Package Release

Package draw2d is a pure go 2D vector graphics library with support for multiple output devices such as images (draw2d), pdf documents (draw2dpdf) and opengl (draw2dgl), which can also be used on the google app engine. It can be used as a pure go Cairo alternative. draw2d is released under the BSD license. Operations in draw2d include stroking and filling polygons, arcs, Bézier curves, drawing images and text rendering with truetype fonts. All drawing operations can be transformed by affine transformations (scale, rotation, translation). Package draw2d follows the conventions of http://www.w3.org/TR/2dcontext for coordinate system, angles, etc... To install or update the package draw2d on your system, run: Package draw2d itself provides a graphic context that can draw vector graphics and text on an image canvas. The following Go code generates a simple drawing and saves it to an image file: There are more examples here: https://gopkg.in/llgcode/draw2d.v1/tree/master/samples Drawing on pdf documents is provided by the draw2dpdf package. Drawing on opengl is provided by the draw2dgl package. See subdirectories at the bottom of this page. The samples are run as tests from the root package folder `draw2d` by: Or if you want to run with test coverage: This will generate output by the different backends in the output folder. Laurent Le Goff wrote this library, inspired by Postscript and HTML5 canvas. He implemented the image and opengl backend with the freetype-go package. Also he created a pure go Postscript interpreter, which can read postscript images and draw to a draw2d graphic context (https://github.com/llgcode/ps). Stani Michiels implemented the pdf backend with the gofpdf package. - https://github.com/llgcode/ps: Postscript interpreter written in Go - https://github.com/gonum/plot: drawing plots in Go - https://github.com/muesli/smartcrop: content aware image cropping - https://github.com/peterhellberg/karta: drawing Voronoi diagrams - https://github.com/vdobler/chart: basic charts in Go

Package semver provides the ability to work with Semantic Versions (http://semver.org) in Go. Specifically it provides the ability to: There are two functions that can parse semantic versions. The `StrictNewVersion` function only parses valid version 2 semantic versions as outlined in the specification. The `NewVersion` function attempts to coerce a version into a semantic version and parse it. For example, if there is a leading v or a version listed without all 3 parts (e.g. 1.2) it will attempt to coerce it into a valid semantic version (e.g., 1.2.0). In both cases a `Version` object is returned that can be sorted, compared, and used in constraints. When parsing a version an optional error can be returned if there is an issue parsing the version. For example, The version object has methods to get the parts of the version, compare it to other versions, convert the version back into a string, and get the original string. For more details please see the documentation at https://godoc.org/github.com/Masterminds/semver. A set of versions can be sorted using the `sort` package from the standard library. For example, There are two methods for comparing versions. One uses comparison methods on `Version` instances and the other is using Constraints. There are some important differences to notes between these two methods of comparison. There are differences between the two methods or checking versions because the comparison methods on `Version` follow the specification while comparison ranges are not part of the specification. Different packages and tools have taken it upon themselves to come up with range rules. This has resulted in differences. For example, npm/js and Cargo/Rust follow similar patterns which PHP has a different pattern for ^. The comparison features in this package follow the npm/js and Cargo/Rust lead because applications using it have followed similar patters with their versions. Checking a version against version constraints is one of the most featureful parts of the package. There are two elements to the comparisons. First, a comparison string is a list of comma or space separated AND comparisons. These are then separated by || (OR) comparisons. For example, `">= 1.2 < 3.0.0 || >= 4.2.3"` is looking for a comparison that's greater than or equal to 1.2 and less than 3.0.0 or is greater than or equal to 4.2.3. This can also be written as `">= 1.2, < 3.0.0 || >= 4.2.3"` The basic comparisons are: There are multiple methods to handle ranges and the first is hyphens ranges. These look like: The `x`, `X`, and `*` characters can be used as a wildcard character. This works for all comparison operators. When used on the `=` operator it falls back to the tilde operation. For example, Tilde Range Comparisons (Patch) The tilde (`~`) comparison operator is for patch level ranges when a minor version is specified and major level changes when the minor number is missing. For example, Caret Range Comparisons (Major) The caret (`^`) comparison operator is for major level changes once a stable (1.0.0) release has occurred. Prior to a 1.0.0 release the minor versions acts as the API stability level. This is useful when comparisons of API versions as a major change is API breaking. For example, In addition to testing a version against a constraint, a version can be validated against a constraint. When validation fails a slice of errors containing why a version didn't meet the constraint is returned. For example,

Command mox is a modern, secure, full-featured, open source mail server for low-maintenance self-hosted email. Mox is started with the "serve" subcommand, but mox also has many other subcommands. Many of those commands talk to a running mox instance, through the ctl file in the data directory. Specify the configuration file (that holds the path to the data directory) through the -config flag or MOXCONF environment variable. Commands that don't talk to a running mox instance are often for testing/debugging email functionality. For example for parsing an email message, or looking up SPF/DKIM/DMARC records. Below is the usage information as printed by the command when started without any parameters. Followed by the help and usage information for each command. Start mox, serving SMTP/IMAP/HTTPS. Incoming email is accepted over SMTP. Email can be retrieved by users using IMAP. HTTP listeners are started for the admin/account web interfaces, and for automated TLS configuration. Missing essential TLS certificates are immediately requested, other TLS certificates are requested on demand. Only implemented on unix systems, not Windows. Quickstart generates configuration files and prints instructions to quickly set up a mox instance. Quickstart writes configuration files, prints initial admin and account passwords, DNS records you should create. If you run it on Linux it writes a systemd service file and prints commands to enable and start mox as service. The user or uid is optional, defaults to "mox", and is the user or uid/gid mox will run as after initialization. Quickstart assumes mox will run on the machine you run quickstart on and uses its host name and public IPs. On many systems the hostname is not a fully qualified domain name, but only the first dns "label", e.g. "mail" in case of "mail.example.org". If so, quickstart does a reverse DNS lookup to find the hostname, and as fallback uses the label plus the domain of the email address you specified. Use flag -hostname to explicitly specify the hostname mox will run on. Mox is by far easiest to operate if you let it listen on port 443 (HTTPS) and 80 (HTTP). TLS will be fully automatic with ACME with Let's Encrypt. You can run mox along with an existing webserver, but because of MTA-STS and autoconfig, you'll need to forward HTTPS traffic for two domains to mox. Run "mox quickstart -existing-webserver ..." to generate configuration files and instructions for configuring mox along with an existing webserver. But please first consider configuring mox on port 443. It can itself serve domains with HTTP/HTTPS, including with automatic TLS with ACME, is easily configured through both configuration files and admin web interface, and can act as a reverse proxy (and static file server for that matter), so you can forward traffic to your existing backend applications. Look for "WebHandlers:" in the output of "mox config describe-domains" and see the output of "mox config example webhandlers". Shut mox down, giving connections maximum 3 seconds to stop before closing them. While shutting down, new IMAP and SMTP connections will get a status response indicating temporary unavailability. Existing connections will get a 3 second period to finish their transaction and shut down. Under normal circumstances, only IMAP has long-living connections, with the IDLE command to get notified of new mail deliveries. Set new password an account. The password is read from stdin. Secrets derived from the password, but not the password itself, are stored in the account database. The stored secrets are for authentication with: scram-sha-256, scram-sha-1, cram-md5, plain text (bcrypt hash). The parameter is an account name, as configured under Accounts in domains.conf and as present in the data/accounts/ directory, not a configured email address for an account. Set a new admin password, for the web interface. The password is read from stdin. Its bcrypt hash is stored in a file named "adminpasswd" in the configuration directory. Print the log levels, or set a new default log level, or a level for the given package. By default, a single log level applies to all logging in mox. But for each "pkg", an overriding log level can be configured. Examples of packages: smtpserver, smtpclient, queue, imapserver, spf, dkim, dmarc, junk, message, etc. Specify a pkg and an empty level to clear the configured level for a package. Valid labels: error, info, debug, trace, traceauth, tracedata. List hold rules for the delivery queue. Messages submitted to the queue that match a hold rule will be marked as on hold and not scheduled for delivery. Add hold rule for the delivery queue. Add a hold rule to mark matching newly submitted messages as on hold. Set the matching rules with the flags. Don't specify any flags to match all submitted messages. Remove hold rule for the delivery queue. Remove a hold rule by its id. List matching messages in the delivery queue. Prints the message with its ID, last and next delivery attempts, last error. Mark matching messages on hold. Messages that are on hold are not delivered until marked as off hold again, or otherwise handled by the admin. Mark matching messages off hold. Once off hold, messages can be delivered according to their current next delivery attempt. See the "queue schedule" command. Change next delivery attempt for matching messages. The next delivery attempt is adjusted by the duration parameter. If the -now flag is set, the new delivery attempt is set to the duration added to the current time, instead of added to the current scheduled time. Schedule immediate delivery with "mox queue schedule -now 0". Set transport for matching messages. By default, the routing rules determine how a message is delivered. The default and common case is direct delivery with SMTP. Messages can get a previously configured transport assigned to use for delivery, e.g. using submission to another mail server or with connections over a SOCKS proxy. Set TLS requirements for delivery of matching messages. Value "yes" is handled as if the RequireTLS extension was specified during submission. Value "no" is handled as if the message has a header "TLS-Required: No". This header is not added by the queue. If messages without this header are relayed through other mail servers they will apply their own default TLS policy. Value "default" is the default behaviour, currently for unverified opportunistic TLS. Fail delivery of matching messages, delivering DSNs. Failing a message is handled similar to how delivery is given up after all delivery attempts failed. The DSN (delivery status notification) message contains a line saying the message was canceled by the admin. Remove matching messages from the queue. Dangerous operation, this completely removes the message. If you want to store the message, use "queue dump" before removing. Dump a message from the queue. The message is printed to stdout and is in standard internet mail format. List matching messages in the retired queue. Prints messages with their ID and results. Print a message from the retired queue. Prints a JSON representation of the information from the retired queue. Print addresses in suppression list. Add address to suppression list for account. Remove address from suppression list for account. Check if address is present in suppression list, for any or specific account. List matching webhooks in the queue. Prints list of webhooks, their IDs and basic information. Change next delivery attempt for matching webhooks. The next delivery attempt is adjusted by the duration parameter. If the -now flag is set, the new delivery attempt is set to the duration added to the current time, instead of added to the current scheduled time. Schedule immediate delivery with "mox queue schedule -now 0". Fail delivery of matching webhooks. Print details of a webhook from the queue. The webhook is printed to stdout as JSON. List matching webhooks in the retired queue. Prints list of retired webhooks, their IDs and basic information. Print details of a webhook from the retired queue. The retired webhook is printed to stdout as JSON. Import a maildir into an account. The mbox/maildir archive is accessed and imported by the running mox process, so it must have access to the archive files. The default suggested systemd service file isolates mox from most of the file system, with only the "data/" directory accessible, so you may want to put the mbox/maildir archive files in a directory like "data/import/" to make it available to mox. By default, messages will train the junk filter based on their flags and, if "automatic junk flags" configuration is set, based on mailbox naming. If the destination mailbox is the Sent mailbox, the recipients of the messages are added to the message metadata, causing later incoming messages from these recipients to be accepted, unless other reputation signals prevent that. Users can also import mailboxes/messages through the account web page by uploading a zip or tgz file with mbox and/or maildirs. Messages are imported even if already present. Importing messages twice will result in duplicate messages. Mailbox flags, like "seen", "answered", will be imported. An optional dovecot-keywords file can specify additional flags, like Forwarded/Junk/NotJunk. Import an mbox into an account. Using mbox is not recommended, maildir is a better defined format. The mbox/maildir archive is accessed and imported by the running mox process, so it must have access to the archive files. The default suggested systemd service file isolates mox from most of the file system, with only the "data/" directory accessible, so you may want to put the mbox/maildir archive files in a directory like "data/import/" to make it available to mox. By default, messages will train the junk filter based on their flags and, if "automatic junk flags" configuration is set, based on mailbox naming. If the destination mailbox is the Sent mailbox, the recipients of the messages are added to the message metadata, causing later incoming messages from these recipients to be accepted, unless other reputation signals prevent that. Users can also import mailboxes/messages through the account web page by uploading a zip or tgz file with mbox and/or maildirs. Messages are imported even if already present. Importing messages twice will result in duplicate messages. Export one or all mailboxes from an account in maildir format. Export bypasses a running mox instance. It opens the account mailbox/message database file directly. This may block if a running mox instance also has the database open, e.g. for IMAP connections. To export from a running instance, use the accounts web page or webmail. Export messages from one or all mailboxes in an account in mbox format. Using mbox is not recommended. Maildir is a better format. Export bypasses a running mox instance. It opens the account mailbox/message database file directly. This may block if a running mox instance also has the database open, e.g. for IMAP connections. To export from a running instance, use the accounts web page or webmail. For mbox export, "mboxrd" is used where message lines starting with the magic "From " string are escaped by prepending a >. All ">*From " are escaped, otherwise reconstructing the original could lose a ">". Start a local SMTP/IMAP server that accepts all messages, useful when testing/developing software that sends email. Localserve starts mox with a configuration suitable for local email-related software development/testing. It listens for SMTP/Submission(s), IMAP(s) and HTTP(s), on the regular port numbers + 1000. Data is stored in the system user's configuration directory under "mox-localserve", e.g. $HOME/.config/mox-localserve/ on linux, but can be overridden with the -dir flag. If the directory does not yet exist, it is automatically initialized with configuration files, an account with email address mox@localhost and password moxmoxmox, and a newly generated self-signed TLS certificate. Incoming messages are delivered as normal, falling back to accepting and delivering to the mox account for unknown addresses. Submitted messages are added to the queue, which delivers by ignoring the destination servers, always connecting to itself instead. Recipient addresses with the following localpart suffixes are handled specially: - "temperror": fail with a temporary error code - "permerror": fail with a permanent error code - [45][0-9][0-9]: fail with the specific error code - "timeout": no response (for an hour) If the localpart begins with "mailfrom" or "rcptto", the error is returned during those commands instead of during "data". Prints help about matching commands. If multiple commands match, they are listed along with the first line of their help text. If a single command matches, its usage and full help text is printed. Creates a backup of the data directory. Backup creates consistent snapshots of the databases and message files and copies other files in the data directory. Empty directories are not copied. These files can then be stored elsewhere for long-term storage, or used to fall back to should an upgrade fail. Simply copying files in the data directory while mox is running can result in unusable database files. Message files never change (they are read-only, though can be removed) and are hard-linked so they don't consume additional space. If hardlinking fails, for example when the backup destination directory is on a different file system, a regular copy is made. Using a destination directory like "data/tmp/backup" increases the odds hardlinking succeeds: the default systemd service file specifically mounts the data directory, causing attempts to hardlink outside it to fail with an error about cross-device linking. All files in the data directory that aren't recognized (i.e. other than known database files, message files, an acme directory, the "tmp" directory, etc), are stored, but with a warning. Remove files in the destination directory before doing another backup. The backup command will not overwrite files, but print and return errors. Exit code 0 indicates the backup was successful. A clean successful backup does not print any output, but may print warnings. Use the -verbose flag for details, including timing. To restore a backup, first shut down mox, move away the old data directory and move an earlier backed up directory in its place, run "mox verifydata", possibly with the "-fix" option, and restart mox. After the restore, you may also want to run "mox bumpuidvalidity" for each account for which messages in a mailbox changed, to force IMAP clients to synchronize mailbox state. Before upgrading, to check if the upgrade will likely succeed, first make a backup, then use the new mox binary to run "mox verifydata" on the backup. This can change the backup files (e.g. upgrade database files, move away unrecognized message files), so you should make a new backup before actually upgrading. Verify the contents of a data directory, typically of a backup. Verifydata checks all database files to see if they are valid BoltDB/bstore databases. It checks that all messages in the database have a corresponding on-disk message file and there are no unrecognized files. If option -fix is specified, unrecognized message files are moved away. This may be needed after a restore, because messages enqueued or delivered in the future may get those message sequence numbers assigned and writing the message file would fail. Consistency of message/mailbox UID, UIDNEXT and UIDVALIDITY is verified as well. Because verifydata opens the database files, schema upgrades may automatically be applied. This can happen if you use a new mox release. It is useful to run "mox verifydata" with a new binary before attempting an upgrade, but only on a copy of the database files, as made with "mox backup". Before upgrading, make a new backup again since "mox verifydata" may have upgraded the database files, possibly making them potentially no longer readable by the previous version. Print licenses of mox source code and dependencies. Parses and validates the configuration files. If valid, the command exits with status 0. If not valid, all errors encountered are printed. Check the DNS records with the configuration for the domain, and print any errors/warnings. Prints annotated DNS records as zone file that should be created for the domain. The zone file can be imported into existing DNS software. You should review the DNS records, especially if your domain previously/currently has email configured. Prints an annotated empty configuration for use as domains.conf. The domains configuration file contains the domains and their configuration, and accounts and their configuration. This includes the configured email addresses. The mox admin web interface, and the mox command line interface, can make changes to this file. Mox automatically reloads this file when it changes. Like the static configuration, the example domains.conf printed by this command needs modifications to make it valid. Prints an annotated empty configuration for use as mox.conf. The static configuration file cannot be reloaded while mox is running. Mox has to be restarted for changes to the static configuration file to take effect. This configuration file needs modifications to make it valid. For example, it may contain unfinished list items. Add an account with an email address and reload the configuration. Email can be delivered to this address/account. A password has to be configured explicitly, see the setaccountpassword command. Remove an account and reload the configuration. Email addresses for this account will also be removed, and incoming email for these addresses will be rejected. All data for the account will be removed. Adds an address to an account and reloads the configuration. If address starts with a @ (i.e. a missing localpart), this is a catchall address for the domain. Remove an address and reload the configuration. Incoming email for this address will be rejected after removing an address. Adds a new domain to the configuration and reloads the configuration. The account is used for the postmaster mailboxes the domain, including as DMARC and TLS reporting. Localpart is the "username" at the domain for this account. If must be set if and only if account does not yet exist. Remove a domain from the configuration and reload the configuration. This is a dangerous operation. Incoming email delivery for this domain will be rejected. List aliases for domain. Print settings and members of alias. Add new alias with one or more addresses. Update alias configuration. Remove alias. Add addresses to alias. Remove addresses from alias. Describe configuration for mox when invoked as sendmail. Prints a systemd unit service file for mox. This is the same file as generated using quickstart. If the systemd service file has changed with a newer version of mox, use this command to generate an up to date version. Ensure host private keys exist for TLS listeners with ACME. In mox.conf, each listener can have TLS configured. Long-lived private key files can be specified, which will be used when requesting ACME certificates. Configuring these private keys makes it feasible to publish DANE TLSA records for the corresponding public keys in DNS, protected with DNSSEC, allowing TLS certificate verification without depending on a list of Certificate Authorities (CAs). Previous versions of mox did not pre-generate private keys for use with ACME certificates, but would generate private keys on-demand. By explicitly configuring private keys, they will not change automatedly with new certificates, and the DNS TLSA records stay valid. This command looks for listeners in mox.conf with TLS with ACME configured. For each missing host private key (of type rsa-2048 and ecdsa-p256) a key is written to config/hostkeys/. If a certificate exists in the ACME "cache", its private key is copied. Otherwise a new private key is generated. Snippets for manually updating/editing mox.conf are printed. After running this command, and updating mox.conf, run "mox config dnsrecords" for a domain and create the TLSA DNS records it suggests to enable DANE. List available config examples, or print a specific example. Check if a newer version of mox is available. A single DNS TXT lookup to _updates.xmox.nl tells if a new version is available. If so, a changelog is fetched from https://updates.xmox.nl, and the individual entries verified with a builtin public key. The changelog is printed. Turn an ID from a Received header into a cid, for looking up in logs. A cid is essentially a connection counter initialized when mox starts. Each log line contains a cid. Received headers added by mox contain a unique ID that can be decrypted to a cid by admin of a mox instance only. Print the configuration for email clients for a domain. Sending email is typically not done on the SMTP port 25, but on submission ports 465 (with TLS) and 587 (without initial TLS, but usually added to the connection with STARTTLS). For IMAP, the port with TLS is 993 and without is 143. Without TLS/STARTTLS, passwords are sent in clear text, which should only be configured over otherwise secured connections, like a VPN. Dial the address using TLS with certificate verification using DANE. Data is copied between connection and stdin/stdout until either side closes the connection. Connect to MX server for domain using STARTTLS verified with DANE. If no destination host is specified, regular delivery logic is used to find the hosts to attempt delivery too. This involves following CNAMEs for the domain, looking up MX records, and possibly falling back to the domain name itself as host. If a destination host is specified, that is the only candidate host considered for dialing. With a list of destinations gathered, each is dialed until a successful SMTP session verified with DANE has been initialized, including EHLO and STARTTLS commands. Once connected, data is copied between connection and stdin/stdout, until either side closes the connection. This command follows the same logic as delivery attempts made from the queue, sharing most of its code. Print TLSA record for given certificate/key and parameters. Valid values: - usage: pkix-ta (0), pkix-ee (1), dane-ta (2), dane-ee (3) - selector: cert (0), spki (1) - matchtype: full (0), sha2-256 (1), sha2-512 (2) Common DANE TLSA record parameters are: dane-ee spki sha2-256, or 3 1 1, followed by a sha2-256 hash of the DER-encoded "SPKI" (subject public key info) from the certificate. An example DNS zone file entry: The first usable information from the pem file is used to compose the TLSA record. In case of selector "cert", a certificate is required. Otherwise the "subject public key info" (spki) of the first certificate or public or private key (pkcs#8, pkcs#1 or ec private key) is used. Lookup DNS name of given type. Lookup always prints whether the response was DNSSEC-protected. Examples: mox dns lookup ptr 1.1.1.1 mox dns lookup mx xmox.nl mox dns lookup txt _dmarc.xmox.nl. mox dns lookup tlsa _25._tcp.xmox.nl Generate a new ed25519 key for use with DKIM. Ed25519 keys are much smaller than RSA keys of comparable cryptographic strength. This is convenient because of maximum DNS message sizes. At the time of writing, not many mail servers appear to support ed25519 DKIM keys though, so it is recommended to sign messages with both RSA and ed25519 keys. Generate a new 2048 bit RSA private key for use with DKIM. The generated file is in PEM format, and has a comment it is generated for use with DKIM, by mox. Lookup and print the DKIM record for the selector at the domain. Print a DKIM DNS TXT record with the public key derived from the private key read from stdin. The DNS should be configured as a TXT record at $selector._domainkey.$domain. Verify the DKIM signatures in a message and print the results. The message is parsed, and the DKIM-Signature headers are validated. Validation of older messages may fail because the DNS records have been removed or changed by now, or because the signature header may have specified an expiration time that was passed. Sign a message, adding DKIM-Signature headers based on the domain in the From header. The message is parsed, the domain looked up in the configuration files, and DKIM-Signature headers generated. The message is printed with the DKIM-Signature headers prepended. Lookup dmarc policy for domain, a DNS TXT record at _dmarc.<domain>, validate and print it. Parse a DMARC report from an email message, and print its extracted details. DMARC reports are periodically mailed, if requested in the DMARC DNS record of a domain. Reports are sent by mail servers that received messages with our domain in a From header. This may or may not be legatimate email. DMARC reports contain summaries of evaluations of DMARC and DKIM/SPF, which can help understand email deliverability problems. Parse an email message and evaluate it against the DMARC policy of the domain in the From-header. mailfromaddress and helodomain are used for SPF validation. If both are empty, SPF validation is skipped. mailfromaddress should be the address used as MAIL FROM in the SMTP session. For DSN messages, that address may be empty. The helo domain was specified at the beginning of the SMTP transaction that delivered the message. These values can be found in message headers. For each reporting address in the domain's DMARC record, check if it has opted into receiving reports (if needed). A DMARC record can request reports about DMARC evaluations to be sent to an email/http address. If the organizational domains of that of the DMARC record and that of the report destination address do not match, the destination address must opt-in to receiving DMARC reports by creating a DMARC record at <dmarcdomain>._report._dmarc.<reportdestdomain>. Test if IP is in the DNS blocklist of the zone, e.g. bl.spamcop.net. If the IP is in the blocklist, an explanation is printed. This is typically a URL with more information. Check the health of the DNS blocklist represented by zone, e.g. bl.spamcop.net. The health of a DNS blocklist can be checked by querying for 127.0.0.1 and 127.0.0.2. The second must and the first must not be present. Lookup the MTASTS record and policy for the domain. MTA-STS is a mechanism for a domain to specify if it requires TLS connections for delivering email. If a domain has a valid MTA-STS DNS TXT record at _mta-sts.<domain> it signals it implements MTA-STS. A policy can then be fetched at https://mta-sts.<domain>/.well-known/mta-sts.txt. The policy specifies the mode (enforce, testing, none), which MX servers support TLS and should be used, and how long the policy can be cached. Recreate and retrain the junk filter for the account. Useful after having made changes to the junk filter configuration, or if the implementation has changed. Sendmail is a drop-in replacement for /usr/sbin/sendmail to deliver emails sent by unix processes like cron. If invoked as "sendmail", it will act as sendmail for sending messages. Its intention is to let processes like cron send emails. Messages are submitted to an actual mail server over SMTP. The destination mail server and credentials are configured in /etc/moxsubmit.conf, see mox config describe-sendmail. The From message header is rewritten to the configured address. When the addressee appears to be a local user, because without @, the message is sent to the configured default address. If submitting an email fails, it is added to a directory moxsubmit.failures in the user's home directory. Most flags are ignored to fake compatibility with other sendmail implementations. A single recipient or the -t flag with a To-header is required. With the -t flag, Cc and Bcc headers are not handled specially, so Bcc is not removed and the addresses do not receive the email. /etc/moxsubmit.conf should be group-readable and not readable by others and this binary should be setgid that group: Check the status of IP for the policy published in DNS for the domain. IPs may be allowed to send for a domain, or disallowed, and several shades in between. If not allowed, an explanation may be provided by the policy. If so, the explanation is printed. The SPF mechanism that matched (if any) is also printed. Lookup the SPF record for the domain and print it. Parse the record as SPF record. If valid, nothing is printed. Lookup the TLSRPT record for the domain. A TLSRPT record typically contains an email address where reports about TLS connectivity should be sent. Mail servers attempting delivery to our domain should attempt to use TLS. TLSRPT lets them report how many connection successfully used TLS, and how what kind of errors occurred otherwise. Parse and print the TLSRPT in the message. The report is printed in formatted JSON. Prints this mox version. Lists available methods, prints request/response parameters for method, or calls a method with a request read from standard input. List available examples, or print a specific example. Change the IMAP UID validity of the mailbox, causing IMAP clients to refetch messages. This can be useful after manually repairing metadata about the account/mailbox. Opens account database file directly. Ensure mox does not have the account open, or is not running. Reassign UIDs in one mailbox or all mailboxes in an account and bump UID validity, causing IMAP clients to refetch messages. Opens account database file directly. Ensure mox does not have the account open, or is not running. Fix inconsistent UIDVALIDITY and UIDNEXT in messages/mailboxes/account. The next UID to use for a message in a mailbox should always be higher than any existing message UID in the mailbox. If it is not, the mailbox UIDNEXT is updated. Each mailbox has a UIDVALIDITY sequence number, which should always be lower than the per-account next UIDVALIDITY to use. If it is not, the account next UIDVALIDITY is updated. Opens account database file directly. Ensure mox does not have the account open, or is not running. Ensure message sizes in the database matching the sum of the message prefix length and on-disk file size. Messages with an inconsistent size are also parsed again. If an inconsistency is found, you should probably also run "mox bumpuidvalidity" on the mailboxes or entire account to force IMAP clients to refetch messages. Parse all messages in the account or all accounts again. Can be useful after upgrading mox with improved message parsing. Messages are parsed in batches, so other access to the mailboxes/messages are not blocked while reparsing all messages. Ensure messages in the database have a pre-parsed MIME form in the database. Recalculate message counts for all mailboxes in the account, and total message size for quota. When a message is added to/removed from a mailbox, or when message flags change, the total, unread, unseen and deleted messages are accounted, the total size of the mailbox, and the total message size for the account. In case of a bug in this accounting, the numbers could become incorrect. This command will find, fix and print them. Parse message, print JSON representation. Reassign message threads. For all accounts, or optionally only the specified account. Threading for all messages in an account is first reset, and new base subject and normalized message-id saved with the message. Then all messages are evaluated and matched against their parents/ancestors. Messages are matched based on the References header, with a fall-back to an In-Reply-To header, and if neither is present/valid, based only on base subject. A References header typically points to multiple previous messages in a hierarchy. From oldest ancestor to most recent parent. An In-Reply-To header would have only a message-id of the parent message. A message is only linked to a parent/ancestor if their base subject is the same. This ensures unrelated replies, with a new subject, are placed in their own thread. The base subject is lower cased, has whitespace collapsed to a single space, and some components removed: leading "Re:", "Fwd:", "Fw:", or bracketed tag (that mailing lists often add, e.g. "[listname]"), trailing "(fwd)", or enclosing "[fwd: ...]". Messages are linked to all their ancestors. If an intermediate parent/ancestor message is deleted in the future, the message can still be linked to the earlier ancestors. If the direct parent already wasn't available while matching, this is stored as the message having a "missing link" to its stored ancestors.

Package XGB provides the X Go Binding, which is a low-level API to communicate with the core X protocol and many of the X extensions. It is *very* closely modeled on XCB, so that experience with XCB (or xpyb) is easily translatable to XGB. That is, it uses the same cookie/reply model and is thread safe. There are otherwise no major differences (in the API). Most uses of XGB typically fall under the realm of window manager and GUI kit development, but other applications (like pagers, panels, tilers, etc.) may also require XGB. Moreover, it is a near certainty that if you need to work with X, xgbutil will be of great use to you as well: https://github.com/BurntSushi/xgbutil This is an extremely terse example that demonstrates how to connect to X, create a window, listen to StructureNotify events and Key{Press,Release} events, map the window, and print out all events received. An example with accompanying documentation can be found in examples/create-window. This is another small example that shows how to query Xinerama for geometry information of each active head. Accompanying documentation for this example can be found in examples/xinerama. XGB can benefit greatly from parallelism due to its concurrent design. For evidence of this claim, please see the benchmarks in xproto/xproto_test.go. xproto/xproto_test.go contains a number of contrived tests that stress particular corners of XGB that I presume could be problem areas. Namely: requests with no replies, requests with replies, checked errors, unchecked errors, sequence number wrapping, cookie buffer flushing (i.e., forcing a round trip every N requests made that don't have a reply), getting/setting properties and creating a window and listening to StructureNotify events. Both XCB and xpyb use the same Python module (xcbgen) for a code generator. XGB (before this fork) used the same code generator as well, but in my attempt to add support for more extensions, I found the code generator extremely difficult to work with. Therefore, I re-wrote the code generator in Go. It can be found in its own sub-package, xgbgen, of xgb. My design of xgbgen includes a rough consideration that it could be used for other languages. I am reasonably confident that the core X protocol is in full working form. I've also tested the Xinerama and RandR extensions sparingly. Many of the other existing extensions have Go source generated (and are compilable) and are included in this package, but I am currently unsure of their status. They *should* work. XKB is the only extension that intentionally does not work, although I suspect that GLX also does not work (however, there is Go source code for GLX that compiles, unlike XKB). I don't currently have any intention of getting XKB working, due to its complexity and my current mental incapacity to test it.

Package XGB provides the X Go Binding, which is a low-level API to communicate with the core X protocol and many of the X extensions. It is *very* closely modeled on XCB, so that experience with XCB (or xpyb) is easily translatable to XGB. That is, it uses the same cookie/reply model and is thread safe. There are otherwise no major differences (in the API). Most uses of XGB typically fall under the realm of window manager and GUI kit development, but other applications (like pagers, panels, tilers, etc.) may also require XGB. Moreover, it is a near certainty that if you need to work with X, xgbutil will be of great use to you as well: https://github.com/BurntSushi/xgbutil This is an extremely terse example that demonstrates how to connect to X, create a window, listen to StructureNotify events and Key{Press,Release} events, map the window, and print out all events received. An example with accompanying documentation can be found in examples/create-window. This is another small example that shows how to query Xinerama for geometry information of each active head. Accompanying documentation for this example can be found in examples/xinerama. XGB can benefit greatly from parallelism due to its concurrent design. For evidence of this claim, please see the benchmarks in xproto/xproto_test.go. xproto/xproto_test.go contains a number of contrived tests that stress particular corners of XGB that I presume could be problem areas. Namely: requests with no replies, requests with replies, checked errors, unchecked errors, sequence number wrapping, cookie buffer flushing (i.e., forcing a round trip every N requests made that don't have a reply), getting/setting properties and creating a window and listening to StructureNotify events. Both XCB and xpyb use the same Python module (xcbgen) for a code generator. XGB (before this fork) used the same code generator as well, but in my attempt to add support for more extensions, I found the code generator extremely difficult to work with. Therefore, I re-wrote the code generator in Go. It can be found in its own sub-package, xgbgen, of xgb. My design of xgbgen includes a rough consideration that it could be used for other languages. I am reasonably confident that the core X protocol is in full working form. I've also tested the Xinerama and RandR extensions sparingly. Many of the other existing extensions have Go source generated (and are compilable) and are included in this package, but I am currently unsure of their status. They *should* work. XKB is the only extension that intentionally does not work, although I suspect that GLX also does not work (however, there is Go source code for GLX that compiles, unlike XKB). I don't currently have any intention of getting XKB working, due to its complexity and my current mental incapacity to test it.

Package XGB provides the X Go Binding, which is a low-level API to communicate with the core X protocol and many of the X extensions. It is *very* closely modeled on XCB, so that experience with XCB (or xpyb) is easily translatable to XGB. That is, it uses the same cookie/reply model and is thread safe. There are otherwise no major differences (in the API). Most uses of XGB typically fall under the realm of window manager and GUI kit development, but other applications (like pagers, panels, tilers, etc.) may also require XGB. Moreover, it is a near certainty that if you need to work with X, xgbutil will be of great use to you as well: https://github.com/BurntSushi/xgbutil This is an extremely terse example that demonstrates how to connect to X, create a window, listen to StructureNotify events and Key{Press,Release} events, map the window, and print out all events received. An example with accompanying documentation can be found in examples/create-window. This is another small example that shows how to query Xinerama for geometry information of each active head. Accompanying documentation for this example can be found in examples/xinerama. XGB can benefit greatly from parallelism due to its concurrent design. For evidence of this claim, please see the benchmarks in xproto/xproto_test.go. xproto/xproto_test.go contains a number of contrived tests that stress particular corners of XGB that I presume could be problem areas. Namely: requests with no replies, requests with replies, checked errors, unchecked errors, sequence number wrapping, cookie buffer flushing (i.e., forcing a round trip every N requests made that don't have a reply), getting/setting properties and creating a window and listening to StructureNotify events. Both XCB and xpyb use the same Python module (xcbgen) for a code generator. XGB (before this fork) used the same code generator as well, but in my attempt to add support for more extensions, I found the code generator extremely difficult to work with. Therefore, I re-wrote the code generator in Go. It can be found in its own sub-package, xgbgen, of xgb. My design of xgbgen includes a rough consideration that it could be used for other languages. I am reasonably confident that the core X protocol is in full working form. I've also tested the Xinerama and RandR extensions sparingly. Many of the other existing extensions have Go source generated (and are compilable) and are included in this package, but I am currently unsure of their status. They *should* work. XKB is the only extension that intentionally does not work, although I suspect that GLX also does not work (however, there is Go source code for GLX that compiles, unlike XKB). I don't currently have any intention of getting XKB working, due to its complexity and my current mental incapacity to test it.

Package yarpc provides the YARPC service framework. With hundreds to thousands of services communicating with RPC, transport protocols (like HTTP and TChannel), encoding protocols (like JSON or Thrift), and peer choosers are the concepts that vary year over year. Separating these concerns allows services to change transports and wire protocols without changing call sites or request handlers, build proxies and wire protocol bridges, or experiment with load balancing strategies. YARPC is a toolkit for services and proxies. YARPC breaks RPC into interchangeable encodings, transports, and peer choosers. YARPC for Go provides reference implementations for HTTP/1.1, TChannel and gRPC transports, and also raw, JSON, Thrift, and Protobuf encodings. YARPC for Go provides a round robin peer chooser and experimental implementations for debug pages and rate limiting. YARPC for Go plans to provide a load balancer that uses a least-pending-requests strategy. Peer choosers can implement any strategy, including load balancing or sharding, in turn bound to any peer list updater. Regardless of transport, every RPC has some common properties: caller name, service name, procedure name, encoding name, deadline or TTL, headers, baggage (multi-hop headers), and tracing. Each RPC can also have an optional shard key, routing key, or routing delegate for advanced routing. YARPC transports use a shared API for capturing RPC metadata, so middleware can apply to requests over any transport. Each YARPC transport protocol can implement inbound handlers and outbound callers. Each of these can support different RPC types, like unary (request and response) or oneway (request and receipt) RPC. A future release of YARPC will add support for other RPC types including variations on streaming and pubsub.

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy(request level configuration), alternatively, global(all services) or client level RetryPolicy configration is also possible. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go If you are trying to make a PUT/POST API call with binary request body, please make sure the binary request body is resettable, which means the request body should inherit Seeker interface. The Retry behavior Precedence (Highest to lowest) is defined as below:- The OCI Go SDK defines a default retry policy that retries on the errors suitable for retries (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm), for a recommended period of time (up to 7 attempts spread out over at most approximately 1.5 minutes). The default retry policy is defined by : Default Retry-able Errors Below is the list of default retry-able errors for which retry attempts should be made. The following errors should be retried (with backoff). HTTP Code Customer-facing Error Code Apart from the above errors, retries should also be attempted in the following Client Side errors : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) The above errors can be avoided through retrying and hence, are classified as the default retry-able errors. Additionally, retries should also be made for Circuit Breaker exceptions (Exceptions raised by Circuit Breaker in an open state) Default Termination Strategy The termination strategy defines when SDKs should stop attempting to retry. In other words, it's the deadline for retries. The OCI SDKs should stop retrying the operation after 7 retry attempts. This means the SDKs will have retried for ~98 seconds or ~1.5 minutes have elapsed due to total delays. SDKs will make a total of 8 attempts. (1 initial request + 7 retries) Default Delay Strategy Default Delay Strategy - The delay strategy defines the amount of time to wait between each of the retry attempts. The default delay strategy chosen for the SDK – Exponential backoff with jitter, using: 1. The base time to use in retry calculations will be 1 second 2. An exponent of 2. When calculating the next retry time, the SDK will raise this to the power of the number of attempts 3. A maximum wait time between calls of 30 seconds (Capped) 4. Added jitter value between 0-1000 milliseconds to spread out the requests Configure and use default retry policy You can set this retry policy for a single request: or for all requests made by a client: or for all requests made by all clients: or setting default retry via environment varaible, which is a global switch for all services: Some services enable retry for operations by default, this can be overridden using any alternatives mentioned above. To know which service operations have retries enabled by default, look at the operation's description in the SDK - it will say whether that it has retries enabled by default Some resources may have to be replicated across regions and are only eventually consistent. That means the request to create, update, or delete the resource succeeded, but the resource is not available everywhere immediately. Creating, updating, or deleting any resource in the Identity service is affected by eventual consistency, and doing so may cause other operations in other services to fail until the Identity resource has been replicated. For example, the request to CreateTag in the Identity service in the home region succeeds, but immediately using that created tag in another region in a request to LaunchInstance in the Compute service may fail. If you are creating, updating, or deleting resources in the Identity service, we recommend using an eventually consistent retry policy for any service you access. The default retry policy already deals with eventual consistency. Example: This retry policy will use a different strategy if an eventually consistent change was made in the recent past (called the "eventually consistent window", currently defined to be 4 minutes after the eventually consistent change). This special retry policy for eventual consistency will: 1. make up to 9 attempts (including the initial attempt); if an attempt is successful, no more attempts will be made 2. retry at most until (a) approximately the end of the eventually consistent window or (b) the end of the default retry period of about 1.5 minutes, whichever is farther in the future; if an attempt is successful, no more attempts will be made, and the OCI Go SDK will not wait any longer 3. retry on the error codes 400-RelatedResourceNotAuthorizedOrNotFound, 404-NotAuthorizedOrNotFound, and 409-NotAuthorizedOrResourceAlreadyExists, for which the default retry policy does not retry, in addition to the errors the default retry policy retries on (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm) If there were no eventually consistent actions within the recent past, then this special retry strategy is not used. If you want a retry policy that does not handle eventual consistency in a special way, for example because you retry on all error responses, you can use DefaultRetryPolicyWithoutEventualConsistency or NewRetryPolicyWithOptions with the common.ReplaceWithValuesFromRetryPolicy(common.DefaultRetryPolicyWithoutEventualConsistency()) option: The NewRetryPolicy function also creates a retry policy without eventual consistency. Circuit Breaker can prevent an application repeatedly trying to execute an operation that is likely to fail, allowing it to continue without waiting for the fault to be rectified or wasting CPU cycles, of course, it also enables an application to detect whether the fault has been resolved. If the problem appears to have been rectified, the application can attempt to invoke the operation. Go SDK intergrates sony/gobreaker solution, wraps in a circuit breaker object, which monitors for failures. Once the failures reach a certain threshold, the circuit breaker trips, and all further calls to the circuit breaker return with an error, this also saves the service from being overwhelmed with network calls in case of an outage. Circuit Breaker Configuration Definitions 1. Failure Rate Threshold - The state of the CircuitBreaker changes from CLOSED to OPEN when the failure rate is equal or greater than a configurable threshold. For example when more than 50% of the recorded calls have failed. 2. Reset Timeout - The timeout after which an open circuit breaker will attempt a request if a request is made 3. Failure Exceptions - The list of Exceptions that will be regarded as failures for the circuit. 4. Minimum number of calls/ Volume threshold - Configures the minimum number of calls which are required (per sliding window period) before the CircuitBreaker can calculate the error rate. 1. Failure Rate Threshold - 80% - This means when 80% of the requests calculated for a time window of 120 seconds have failed then the circuit will transition from closed to open. 2. Minimum number of calls/ Volume threshold - A value of 10, for the above defined time window of 120 seconds. 3. Reset Timeout - 30 seconds to wait before setting the breaker to halfOpen state, and trying the action again. 4. Failure Exceptions - The failures for the circuit will only be recorded for the retryable/transient exceptions. This means only the following exceptions will be regarded as failure for the circuit. HTTP Code Customer-facing Error Code Apart from the above, the following client side exceptions will also be treated as a failure for the circuit : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) Go SDK enable circuit breaker with default configuration for most of the service clients, if you don't want to enable the solution, can disable the functionality before your application running Go SDK also supports customize Circuit Breaker with specified configurations. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_circuitbreaker_test.go To know which service clients have circuit breakers enabled, look at the service client's description in the SDK - it will say whether that it has circuit breakers enabled by default The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy(request level configuration), alternatively, global(all services) or client level RetryPolicy configration is also possible. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go If you are trying to make a PUT/POST API call with binary request body, please make sure the binary request body is resettable, which means the request body should inherit Seeker interface. The Retry behavior Precedence (Highest to lowest) is defined as below:- The OCI Go SDK defines a default retry policy that retries on the errors suitable for retries (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm), for a recommended period of time (up to 7 attempts spread out over at most approximately 1.5 minutes). The default retry policy is defined by : Default Retry-able Errors Below is the list of default retry-able errors for which retry attempts should be made. The following errors should be retried (with backoff). HTTP Code Customer-facing Error Code Apart from the above errors, retries should also be attempted in the following Client Side errors : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) The above errors can be avoided through retrying and hence, are classified as the default retry-able errors. Additionally, retries should also be made for Circuit Breaker exceptions (Exceptions raised by Circuit Breaker in an open state) Default Termination Strategy The termination strategy defines when SDKs should stop attempting to retry. In other words, it's the deadline for retries. The OCI SDKs should stop retrying the operation after 7 retry attempts. This means the SDKs will have retried for ~98 seconds or ~1.5 minutes have elapsed due to total delays. SDKs will make a total of 8 attempts. (1 initial request + 7 retries) Default Delay Strategy Default Delay Strategy - The delay strategy defines the amount of time to wait between each of the retry attempts. The default delay strategy chosen for the SDK – Exponential backoff with jitter, using: 1. The base time to use in retry calculations will be 1 second 2. An exponent of 2. When calculating the next retry time, the SDK will raise this to the power of the number of attempts 3. A maximum wait time between calls of 30 seconds (Capped) 4. Added jitter value between 0-1000 milliseconds to spread out the requests Configure and use default retry policy You can set this retry policy for a single request: or for all requests made by a client: or for all requests made by all clients: or setting default retry via environment varaible, which is a global switch for all services: Some services enable retry for operations by default, this can be overridden using any alternatives mentioned above. To know which service operations have retries enabled by default, look at the operation's description in the SDK - it will say whether that it has retries enabled by default Some resources may have to be replicated across regions and are only eventually consistent. That means the request to create, update, or delete the resource succeeded, but the resource is not available everywhere immediately. Creating, updating, or deleting any resource in the Identity service is affected by eventual consistency, and doing so may cause other operations in other services to fail until the Identity resource has been replicated. For example, the request to CreateTag in the Identity service in the home region succeeds, but immediately using that created tag in another region in a request to LaunchInstance in the Compute service may fail. If you are creating, updating, or deleting resources in the Identity service, we recommend using an eventually consistent retry policy for any service you access. The default retry policy already deals with eventual consistency. Example: This retry policy will use a different strategy if an eventually consistent change was made in the recent past (called the "eventually consistent window", currently defined to be 4 minutes after the eventually consistent change). This special retry policy for eventual consistency will: 1. make up to 9 attempts (including the initial attempt); if an attempt is successful, no more attempts will be made 2. retry at most until (a) approximately the end of the eventually consistent window or (b) the end of the default retry period of about 1.5 minutes, whichever is farther in the future; if an attempt is successful, no more attempts will be made, and the OCI Go SDK will not wait any longer 3. retry on the error codes 400-RelatedResourceNotAuthorizedOrNotFound, 404-NotAuthorizedOrNotFound, and 409-NotAuthorizedOrResourceAlreadyExists, for which the default retry policy does not retry, in addition to the errors the default retry policy retries on (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm) If there were no eventually consistent actions within the recent past, then this special retry strategy is not used. If you want a retry policy that does not handle eventual consistency in a special way, for example because you retry on all error responses, you can use DefaultRetryPolicyWithoutEventualConsistency or NewRetryPolicyWithOptions with the common.ReplaceWithValuesFromRetryPolicy(common.DefaultRetryPolicyWithoutEventualConsistency()) option: The NewRetryPolicy function also creates a retry policy without eventual consistency. Circuit Breaker can prevent an application repeatedly trying to execute an operation that is likely to fail, allowing it to continue without waiting for the fault to be rectified or wasting CPU cycles, of course, it also enables an application to detect whether the fault has been resolved. If the problem appears to have been rectified, the application can attempt to invoke the operation. Go SDK intergrates sony/gobreaker solution, wraps in a circuit breaker object, which monitors for failures. Once the failures reach a certain threshold, the circuit breaker trips, and all further calls to the circuit breaker return with an error, this also saves the service from being overwhelmed with network calls in case of an outage. Circuit Breaker Configuration Definitions 1. Failure Rate Threshold - The state of the CircuitBreaker changes from CLOSED to OPEN when the failure rate is equal or greater than a configurable threshold. For example when more than 50% of the recorded calls have failed. 2. Reset Timeout - The timeout after which an open circuit breaker will attempt a request if a request is made 3. Failure Exceptions - The list of Exceptions that will be regarded as failures for the circuit. 4. Minimum number of calls/ Volume threshold - Configures the minimum number of calls which are required (per sliding window period) before the CircuitBreaker can calculate the error rate. 1. Failure Rate Threshold - 80% - This means when 80% of the requests calculated for a time window of 120 seconds have failed then the circuit will transition from closed to open. 2. Minimum number of calls/ Volume threshold - A value of 10, for the above defined time window of 120 seconds. 3. Reset Timeout - 30 seconds to wait before setting the breaker to halfOpen state, and trying the action again. 4. Failure Exceptions - The failures for the circuit will only be recorded for the retryable/transient exceptions. This means only the following exceptions will be regarded as failure for the circuit. HTTP Code Customer-facing Error Code Apart from the above, the following client side exceptions will also be treated as a failure for the circuit : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) Go SDK enable circuit breaker with default configuration for most of the service clients, if you don't want to enable the solution, can disable the functionality before your application running Go SDK also supports customize Circuit Breaker with specified configurations. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_circuitbreaker_test.go To know which service clients have circuit breakers enabled, look at the service client's description in the SDK - it will say whether that it has circuit breakers enabled by default The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

Package sqlite provides a Go interface to SQLite 3. The semantics of this package are deliberately close to the SQLite3 C API, so it is helpful to be familiar with http://www.sqlite.org/c3ref/intro.html. An SQLite connection is represented by a *sqlite.Conn. Connections cannot be used concurrently. A typical Go program will create a pool of connections (using Open to create a *sqlite.Pool) so goroutines can borrow a connection while they need to talk to the database. This package assumes SQLite will be used concurrently by the process through several connections, so the build options for SQLite enable multi-threading and the shared cache: https://www.sqlite.org/sharedcache.html The implementation automatically handles shared cache locking, see the documentation on Stmt.Step for details. The optional SQLite3 compiled in are: FTS5, RTree, JSON1, Session This is not a database/sql driver. Statements are prepared with the Prepare and PrepareTransient methods. When using Prepare, statements are keyed inside a connection by the original query string used to create them. This means long-running high-performance code paths can write: After all the connections in a pool have been warmed up by passing through one of these Prepare calls, subsequent calls are simply a map lookup that returns an existing statement. The sqlite package supports the SQLite incremental I/O interface for streaming blob data into and out of the the database without loading the entire blob into a single []byte. (This is important when working either with very large blobs, or more commonly, a large number of moderate-sized blobs concurrently.) To write a blob, first use an INSERT statement to set the size of the blob and assign a rowid: Use BindZeroBlob or SetZeroBlob to set the size of myblob. Then you can open the blob with: Every connection can have a done channel associated with it using the SetInterrupt method. This is typically the channel returned by a context.Context Done method. For example, a timeout can be associated with a connection session: As database connections are long-lived, the SetInterrupt method can be called multiple times to reset the associated lifetime. When using pools, the shorthand for associating a context with a connection is: SQLite transactions have to be managed manually with this package by directly calling BEGIN / COMMIT / ROLLBACK or SAVEPOINT / RELEASE/ ROLLBACK. The sqliteutil has a Savepoint function that helps automate this. Using a Pool to execute SQL in a concurrent HTTP handler. For helper functions that make some kinds of statements easier to write see the sqliteutil package.

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

Package libvirt provides a Go binding to the libvirt C library Through conditional compilation it supports libvirt versions 1.2.0 onwards. This is done automatically, with no requirement to use magic Go build tags. If an API was not available in the particular version of libvirt this package was built against, an error will be returned with a code of ERR_NO_SUPPORT. This is the same code seen if using a new libvirt library to talk to an old libvirtd lacking the API, or if a hypervisor does not support a given feature, so an application can easily handle all scenarios together. The Go binding is a fairly direct mapping of the underling C API which seeks to maximise the use of the Go type system to allow strong compiler type checking. The following rules describe how APIs/constants are mapped from C to Go For structs, the 'vir' prefix and 'Ptr' suffix are removed from the name. e.g. virConnectPtr in C becomes 'Connect' in Go. For structs which are reference counted at the C level, it is neccessary to explicitly release the reference at the Go level. e.g. if a Go method returns a '* Domain' struct, it is neccessary to call 'Free' on this when no longer required. The use of 'defer' is recommended for this purpose If multiple goroutines are using the same libvirt object struct, it may not be possible to determine which goroutine should call 'Free'. In such scenarios each new goroutine should call 'Ref' to obtain a private reference on the underlying C struct. All goroutines can call 'Free' unconditionally with the final one causing the release of the C object. For methods, the 'vir' prefix and object name prefix are remove from the name. The C functions become methods with an object receiver. e.g. 'virDomainScreenshot' in C becomes 'Screenshot' with a 'Domain *' receiver. For methods which accept a 'unsigned int flags' parameter in the C level, the corresponding Go parameter will be a named type corresponding to the C enum that defines the valid flags. For example, the ListAllDomains method takes a 'flags ConnectListAllDomainsFlags' parameter. If there are not currently any flags defined for a method in the C API, then the Go method parameter will be declared as a "flags uint32". Callers should always pass the literal integer value 0 for such parameters, without forcing any specific type. This will allow compatibility with future updates to the libvirt-go binding which may replace the 'uint32' type with a enum type at a later date. For enums, the VIR_ prefix is removed from the name. The enums get a dedicated type defined in Go. e.g. the VIR_NODE_SUSPEND_TARGET_MEM enum constant in C, becomes NODE_SUSPEND_TARGET_MEM with a type of NodeSuspendTarget. Methods accepting or returning virTypedParameter arrays in C will map the parameters into a Go struct. The struct will contain two fields for each possible parameter. One boolean field with a suffix of 'Set' indicates whether the parameter has a value set, and the other custom typed field provides the parameter value. This makes it possible to distinguish a parameter with a default value of '0' from a parameter which is 0 because it isn't supported by the hypervisor. If the C API defines additional typed parameters, then the corresponding Go struct will be extended to have further fields. e.g. the GetMemoryStats method in Go (which is backed by virNodeGetMemoryStats in C) will return a NodeMemoryStats struct containing the typed parameter values. Every method that can fail will include an 'error' object as the last return value. This will be an instance of the Error struct if an error occurred. To check for specific libvirt error codes, it is neccessary to cast the error. To connect to libvirt

Package libvirt provides a Go binding to the libvirt C library Through conditional compilation it supports libvirt versions 1.2.0 onwards. This is done automatically, with no requirement to use magic Go build tags. If an API was not available in the particular version of libvirt this package was built against, an error will be returned with a code of ERR_NO_SUPPORT. This is the same code seen if using a new libvirt library to talk to an old libvirtd lacking the API, or if a hypervisor does not support a given feature, so an application can easily handle all scenarios together. The Go binding is a fairly direct mapping of the underling C API which seeks to maximise the use of the Go type system to allow strong compiler type checking. The following rules describe how APIs/constants are mapped from C to Go For structs, the 'vir' prefix and 'Ptr' suffix are removed from the name. e.g. virConnectPtr in C becomes 'Connect' in Go. For structs which are reference counted at the C level, it is neccessary to explicitly release the reference at the Go level. e.g. if a Go method returns a '* Domain' struct, it is neccessary to call 'Free' on this when no longer required. The use of 'defer' is recommended for this purpose If multiple goroutines are using the same libvirt object struct, it may not be possible to determine which goroutine should call 'Free'. In such scenarios each new goroutine should call 'Ref' to obtain a private reference on the underlying C struct. All goroutines can call 'Free' unconditionally with the final one causing the release of the C object. For methods, the 'vir' prefix and object name prefix are remove from the name. The C functions become methods with an object receiver. e.g. 'virDomainScreenshot' in C becomes 'Screenshot' with a 'Domain *' receiver. For methods which accept a 'unsigned int flags' parameter in the C level, the corresponding Go parameter will be a named type corresponding to the C enum that defines the valid flags. For example, the ListAllDomains method takes a 'flags ConnectListAllDomainsFlags' parameter. If there are not currently any flags defined for a method in the C API, then the Go method parameter will be declared as a "flags uint32". Callers should always pass the literal integer value 0 for such parameters, without forcing any specific type. This will allow compatibility with future updates to the libvirt-go binding which may replace the 'uint32' type with a enum type at a later date. For enums, the VIR_ prefix is removed from the name. The enums get a dedicated type defined in Go. e.g. the VIR_NODE_SUSPEND_TARGET_MEM enum constant in C, becomes NODE_SUSPEND_TARGET_MEM with a type of NodeSuspendTarget. Methods accepting or returning virTypedParameter arrays in C will map the parameters into a Go struct. The struct will contain two fields for each possible parameter. One boolean field with a suffix of 'Set' indicates whether the parameter has a value set, and the other custom typed field provides the parameter value. This makes it possible to distinguish a parameter with a default value of '0' from a parameter which is 0 because it isn't supported by the hypervisor. If the C API defines additional typed parameters, then the corresponding Go struct will be extended to have further fields. e.g. the GetMemoryStats method in Go (which is backed by virNodeGetMemoryStats in C) will return a NodeMemoryStats struct containing the typed parameter values. Every method that can fail will include an 'error' object as the last return value. This will be an instance of the Error struct if an error occurred. To check for specific libvirt error codes, it is neccessary to cast the error. To connect to libvirt

Package libvirt provides a Go binding to the libvirt C library Through conditional compilation it supports libvirt versions 1.2.0 onwards. This is done automatically, with no requirement to use magic Go build tags. If an API was not available in the particular version of libvirt this package was built against, an error will be returned with a code of ERR_NO_SUPPORT. This is the same code seen if using a new libvirt library to talk to an old libvirtd lacking the API, or if a hypervisor does not support a given feature, so an application can easily handle all scenarios together. The Go binding is a fairly direct mapping of the underling C API which seeks to maximise the use of the Go type system to allow strong compiler type checking. The following rules describe how APIs/constants are mapped from C to Go For structs, the 'vir' prefix and 'Ptr' suffix are removed from the name. e.g. virConnectPtr in C becomes 'Connect' in Go. For structs which are reference counted at the C level, it is neccessary to explicitly release the reference at the Go level. e.g. if a Go method returns a '* Domain' struct, it is neccessary to call 'Free' on this when no longer required. The use of 'defer' is recommended for this purpose If multiple goroutines are using the same libvirt object struct, it may not be possible to determine which goroutine should call 'Free'. In such scenarios each new goroutine should call 'Ref' to obtain a private reference on the underlying C struct. All goroutines can call 'Free' unconditionally with the final one causing the release of the C object. For methods, the 'vir' prefix and object name prefix are remove from the name. The C functions become methods with an object receiver. e.g. 'virDomainScreenshot' in C becomes 'Screenshot' with a 'Domain *' receiver. For methods which accept a 'unsigned int flags' parameter in the C level, the corresponding Go parameter will be a named type corresponding to the C enum that defines the valid flags. For example, the ListAllDomains method takes a 'flags ConnectListAllDomainsFlags' parameter. If there are not currently any flags defined for a method in the C API, then the Go method parameter will be declared as a "flags uint32". Callers should always pass the literal integer value 0 for such parameters, without forcing any specific type. This will allow compatibility with future updates to the libvirt-go binding which may replace the 'uint32' type with a enum type at a later date. For enums, the VIR_ prefix is removed from the name. The enums get a dedicated type defined in Go. e.g. the VIR_NODE_SUSPEND_TARGET_MEM enum constant in C, becomes NODE_SUSPEND_TARGET_MEM with a type of NodeSuspendTarget. Methods accepting or returning virTypedParameter arrays in C will map the parameters into a Go struct. The struct will contain two fields for each possible parameter. One boolean field with a suffix of 'Set' indicates whether the parameter has a value set, and the other custom typed field provides the parameter value. This makes it possible to distinguish a parameter with a default value of '0' from a parameter which is 0 because it isn't supported by the hypervisor. If the C API defines additional typed parameters, then the corresponding Go struct will be extended to have further fields. e.g. the GetMemoryStats method in Go (which is backed by virNodeGetMemoryStats in C) will return a NodeMemoryStats struct containing the typed parameter values. Every method that can fail will include an 'error' object as the last return value. This will be an instance of the Error struct if an error occurred. To check for specific libvirt error codes, it is neccessary to cast the error. To connect to libvirt

Package libvirt provides a Go binding to the libvirt C library Through conditional compilation it supports libvirt versions 1.2.0 onwards. This is done automatically, with no requirement to use magic Go build tags. If an API was not available in the particular version of libvirt this package was built against, an error will be returned with a code of ERR_NO_SUPPORT. This is the same code seen if using a new libvirt library to talk to an old libvirtd lacking the API, or if a hypervisor does not support a given feature, so an application can easily handle all scenarios together. The Go binding is a fairly direct mapping of the underling C API which seeks to maximise the use of the Go type system to allow strong compiler type checking. The following rules describe how APIs/constants are mapped from C to Go For structs, the 'vir' prefix and 'Ptr' suffix are removed from the name. e.g. virConnectPtr in C becomes 'Connect' in Go. For structs which are reference counted at the C level, it is neccessary to explicitly release the reference at the Go level. e.g. if a Go method returns a '* Domain' struct, it is neccessary to call 'Free' on this when no longer required. The use of 'defer' is recommended for this purpose If multiple goroutines are using the same libvirt object struct, it may not be possible to determine which goroutine should call 'Free'. In such scenarios each new goroutine should call 'Ref' to obtain a private reference on the underlying C struct. All goroutines can call 'Free' unconditionally with the final one causing the release of the C object. For methods, the 'vir' prefix and object name prefix are remove from the name. The C functions become methods with an object receiver. e.g. 'virDomainScreenshot' in C becomes 'Screenshot' with a 'Domain *' receiver. For methods which accept a 'unsigned int flags' parameter in the C level, the corresponding Go parameter will be a named type corresponding to the C enum that defines the valid flags. For example, the ListAllDomains method takes a 'flags ConnectListAllDomainsFlags' parameter. If there are not currently any flags defined for a method in the C API, then the Go method parameter will be declared as a "flags uint32". Callers should always pass the literal integer value 0 for such parameters, without forcing any specific type. This will allow compatibility with future updates to the libvirt-go binding which may replace the 'uint32' type with a enum type at a later date. For enums, the VIR_ prefix is removed from the name. The enums get a dedicated type defined in Go. e.g. the VIR_NODE_SUSPEND_TARGET_MEM enum constant in C, becomes NODE_SUSPEND_TARGET_MEM with a type of NodeSuspendTarget. Methods accepting or returning virTypedParameter arrays in C will map the parameters into a Go struct. The struct will contain two fields for each possible parameter. One boolean field with a suffix of 'Set' indicates whether the parameter has a value set, and the other custom typed field provides the parameter value. This makes it possible to distinguish a parameter with a default value of '0' from a parameter which is 0 because it isn't supported by the hypervisor. If the C API defines additional typed parameters, then the corresponding Go struct will be extended to have further fields. e.g. the GetMemoryStats method in Go (which is backed by virNodeGetMemoryStats in C) will return a NodeMemoryStats struct containing the typed parameter values. Every method that can fail will include an 'error' object as the last return value. This will be an instance of the Error struct if an error occurred. To check for specific libvirt error codes, it is neccessary to cast the error. To connect to libvirt

Package libvirt provides a Go binding to the libvirt C library Through conditional compilation it supports libvirt versions 1.2.0 onwards. This is done automatically, with no requirement to use magic Go build tags. If an API was not available in the particular version of libvirt this package was built against, an error will be returned with a code of ERR_NO_SUPPORT. This is the same code seen if using a new libvirt library to talk to an old libvirtd lacking the API, or if a hypervisor does not support a given feature, so an application can easily handle all scenarios together. The Go binding is a fairly direct mapping of the underling C API which seeks to maximise the use of the Go type system to allow strong compiler type checking. The following rules describe how APIs/constants are mapped from C to Go For structs, the 'vir' prefix and 'Ptr' suffix are removed from the name. e.g. virConnectPtr in C becomes 'Connect' in Go. For structs which are reference counted at the C level, it is neccessary to explicitly release the reference at the Go level. e.g. if a Go method returns a '* Domain' struct, it is neccessary to call 'Free' on this when no longer required. The use of 'defer' is recommended for this purpose If multiple goroutines are using the same libvirt object struct, it may not be possible to determine which goroutine should call 'Free'. In such scenarios each new goroutine should call 'Ref' to obtain a private reference on the underlying C struct. All goroutines can call 'Free' unconditionally with the final one causing the release of the C object. For methods, the 'vir' prefix and object name prefix are remove from the name. The C functions become methods with an object receiver. e.g. 'virDomainScreenshot' in C becomes 'Screenshot' with a 'Domain *' receiver. For methods which accept a 'unsigned int flags' parameter in the C level, the corresponding Go parameter will be a named type corresponding to the C enum that defines the valid flags. For example, the ListAllDomains method takes a 'flags ConnectListAllDomainsFlags' parameter. If there are not currently any flags defined for a method in the C API, then the Go method parameter will be declared as a "flags uint32". Callers should always pass the literal integer value 0 for such parameters, without forcing any specific type. This will allow compatibility with future updates to the libvirt-go binding which may replace the 'uint32' type with a enum type at a later date. For enums, the VIR_ prefix is removed from the name. The enums get a dedicated type defined in Go. e.g. the VIR_NODE_SUSPEND_TARGET_MEM enum constant in C, becomes NODE_SUSPEND_TARGET_MEM with a type of NodeSuspendTarget. Methods accepting or returning virTypedParameter arrays in C will map the parameters into a Go struct. The struct will contain two fields for each possible parameter. One boolean field with a suffix of 'Set' indicates whether the parameter has a value set, and the other custom typed field provides the parameter value. This makes it possible to distinguish a parameter with a default value of '0' from a parameter which is 0 because it isn't supported by the hypervisor. If the C API defines additional typed parameters, then the corresponding Go struct will be extended to have further fields. e.g. the GetMemoryStats method in Go (which is backed by virNodeGetMemoryStats in C) will return a NodeMemoryStats struct containing the typed parameter values. Every method that can fail will include an 'error' object as the last return value. This will be an instance of the Error struct if an error occurred. To check for specific libvirt error codes, it is neccessary to cast the error. To connect to libvirt

Package aw is a "plug-and-play" workflow development library/framework for Alfred 3 & 4 (https://www.alfredapp.com/). It requires Go 1.13 or later. It provides everything you need to create a polished and blazing-fast Alfred frontend for your project. As of AwGo 0.26, all applicable features of Alfred 4.1 are supported. The main features are: AwGo is an opinionated framework that expects to be used in a certain way in order to eliminate boilerplate. It *will* panic if not run in a valid, minimally Alfred-like environment. At a minimum the following environment variables should be set to meaningful values: NOTE: AwGo is currently in development. The API *will* change and should not be considered stable until v1.0. Until then, be sure to pin a version using go modules or similar. Be sure to also check out the _examples/ subdirectory, which contains some simple, but complete, workflows that demonstrate the features of AwGo and useful workflow idioms. Typically, you'd call your program's main entry point via Workflow.Run(). This way, the library will rescue any panic, log the stack trace and show an error message to the user in Alfred. In the Script box (Language = "/bin/bash"): To generate results for Alfred to show in a Script Filter, use the feedback API of Workflow: You can set workflow variables (via feedback) with Workflow.Var, Item.Var and Modifier.Var. See Workflow.SendFeedback for more documentation. Alfred requires a different JSON format if you wish to set workflow variables. Use the ArgVars (named for its equivalent element in Alfred) struct to generate output from Run Script actions. Be sure to set TextErrors to true to prevent Workflow from generating Alfred JSON if it catches a panic: See ArgVars for more information. New() creates a *Workflow using the default values and workflow settings read from environment variables set by Alfred. You can change defaults by passing one or more Options to New(). If you do not want to use Alfred's environment variables, or they aren't set (i.e. you're not running the code in Alfred), use NewFromEnv() with a custom Env implementation. A Workflow can be re-configured later using its Configure() method. See the documentation for Option for more information on configuring a Workflow. AwGo can check for and install new versions of your workflow. Subpackage update provides an implementation of the Updater interface and sources to load updates from GitHub or Gitea releases, or from the URL of an Alfred `metadata.json` file. See subpackage update and _examples/update. AwGo can filter Script Filter feedback using a Sublime Text-like fuzzy matching algorithm. Workflow.Filter() sorts feedback Items against the provided query, removing those that do not match. See _examples/fuzzy for a basic demonstration, and _examples/bookmarks for a demonstration of implementing fuzzy.Sortable on your own structs and customising the fuzzy sort settings. Fuzzy matching is done by package https://godoc.org/go.deanishe.net/fuzzy AwGo automatically configures the default log package to write to STDERR (Alfred's debugger) and a log file in the workflow's cache directory. The log file is necessary because background processes aren't connected to Alfred, so their output is only visible in the log. It is rotated when it exceeds 1 MiB in size. One previous log is kept. AwGo detects when Alfred's debugger is open (Workflow.Debug() returns true) and in this case prepends filename:linenumber: to log messages. The Config struct (which is included in Workflow as Workflow.Config) provides an interface to the workflow's settings from the Workflow Environment Variables panel (see https://www.alfredapp.com/help/workflows/advanced/variables/#environment). Alfred exports these settings as environment variables, and you can read them ad-hoc with the Config.Get*() methods, and save values back to Alfred/info.plist with Config.Set(). Using Config.To() and Config.From(), you can "bind" your own structs to the settings in Alfred: See the documentation for Config.To and Config.From for more information, and _examples/settings for a demo workflow based on the API. The Alfred struct provides methods for the rest of Alfred's AppleScript API. Amongst other things, you can use it to tell Alfred to open, to search for a query, to browse/action files & directories, or to run External Triggers. See documentation of the Alfred struct for more information. AwGo provides a basic, but useful, API for loading and saving data. In addition to reading/writing bytes and marshalling/unmarshalling to/from JSON, the API can auto-refresh expired cache data. See Cache and Session for the API documentation. Workflow has three caches tied to different directories: These all share (almost) the same API. The difference is in when the data go away. Data saved with Session are deleted after the user closes Alfred or starts using a different workflow. The Cache directory is in a system cache directory, so may be deleted by the system or "system maintenance" tools. The Data directory lives with Alfred's application data and would not normally be deleted. Subpackage util provides several functions for running script files and snippets of AppleScript/JavaScript code. See util for documentation and examples. AwGo offers a simple API to start/stop background processes via Workflow's RunInBackground(), IsRunning() and Kill() methods. This is useful for running checks for updates and other jobs that hit the network or take a significant amount of time to complete, allowing you to keep your Script Filters extremely responsive. See _examples/update and _examples/workflows for demonstrations of this API.

Package aw is a "plug-and-play" workflow development library/framework for Alfred 3 & 4 (https://www.alfredapp.com/). It requires Go 1.13 or later. It provides everything you need to create a polished and blazing-fast Alfred frontend for your project. As of AwGo 0.26, all applicable features of Alfred 4.1 are supported. The main features are: AwGo is an opinionated framework that expects to be used in a certain way in order to eliminate boilerplate. It *will* panic if not run in a valid, minimally Alfred-like environment. At a minimum the following environment variables should be set to meaningful values: NOTE: AwGo is currently in development. The API *will* change and should not be considered stable until v1.0. Until then, be sure to pin a version using go modules or similar. Be sure to also check out the _examples/ subdirectory, which contains some simple, but complete, workflows that demonstrate the features of AwGo and useful workflow idioms. Typically, you'd call your program's main entry point via Workflow.Run(). This way, the library will rescue any panic, log the stack trace and show an error message to the user in Alfred. In the Script box (Language = "/bin/bash"): To generate results for Alfred to show in a Script Filter, use the feedback API of Workflow: You can set workflow variables (via feedback) with Workflow.Var, Item.Var and Modifier.Var. See Workflow.SendFeedback for more documentation. Alfred requires a different JSON format if you wish to set workflow variables. Use the ArgVars (named for its equivalent element in Alfred) struct to generate output from Run Script actions. Be sure to set TextErrors to true to prevent Workflow from generating Alfred JSON if it catches a panic: See ArgVars for more information. New() creates a *Workflow using the default values and workflow settings read from environment variables set by Alfred. You can change defaults by passing one or more Options to New(). If you do not want to use Alfred's environment variables, or they aren't set (i.e. you're not running the code in Alfred), use NewFromEnv() with a custom Env implementation. A Workflow can be re-configured later using its Configure() method. See the documentation for Option for more information on configuring a Workflow. AwGo can check for and install new versions of your workflow. Subpackage update provides an implementation of the Updater interface and sources to load updates from GitHub or Gitea releases, or from the URL of an Alfred `metadata.json` file. See subpackage update and _examples/update. AwGo can filter Script Filter feedback using a Sublime Text-like fuzzy matching algorithm. Workflow.Filter() sorts feedback Items against the provided query, removing those that do not match. See _examples/fuzzy for a basic demonstration, and _examples/bookmarks for a demonstration of implementing fuzzy.Sortable on your own structs and customising the fuzzy sort settings. Fuzzy matching is done by package https://godoc.org/go.deanishe.net/fuzzy AwGo automatically configures the default log package to write to STDERR (Alfred's debugger) and a log file in the workflow's cache directory. The log file is necessary because background processes aren't connected to Alfred, so their output is only visible in the log. It is rotated when it exceeds 1 MiB in size. One previous log is kept. AwGo detects when Alfred's debugger is open (Workflow.Debug() returns true) and in this case prepends filename:linenumber: to log messages. The Config struct (which is included in Workflow as Workflow.Config) provides an interface to the workflow's settings from the Workflow Environment Variables panel (see https://www.alfredapp.com/help/workflows/advanced/variables/#environment). Alfred exports these settings as environment variables, and you can read them ad-hoc with the Config.Get*() methods, and save values back to Alfred/info.plist with Config.Set(). Using Config.To() and Config.From(), you can "bind" your own structs to the settings in Alfred: See the documentation for Config.To and Config.From for more information, and _examples/settings for a demo workflow based on the API. The Alfred struct provides methods for the rest of Alfred's AppleScript API. Amongst other things, you can use it to tell Alfred to open, to search for a query, to browse/action files & directories, or to run External Triggers. See documentation of the Alfred struct for more information. AwGo provides a basic, but useful, API for loading and saving data. In addition to reading/writing bytes and marshalling/unmarshalling to/from JSON, the API can auto-refresh expired cache data. See Cache and Session for the API documentation. Workflow has three caches tied to different directories: These all share (almost) the same API. The difference is in when the data go away. Data saved with Session are deleted after the user closes Alfred or starts using a different workflow. The Cache directory is in a system cache directory, so may be deleted by the system or "system maintenance" tools. The Data directory lives with Alfred's application data and would not normally be deleted. Subpackage util provides several functions for running script files and snippets of AppleScript/JavaScript code. See util for documentation and examples. AwGo offers a simple API to start/stop background processes via Workflow's RunInBackground(), IsRunning() and Kill() methods. This is useful for running checks for updates and other jobs that hit the network or take a significant amount of time to complete, allowing you to keep your Script Filters extremely responsive. See _examples/update and _examples/workflows for demonstrations of this API.

Package txdb is a single transaction based database sql driver. When the connection is opened, it starts a transaction and all operations performed on this *sql.DB will be within that transaction. If concurrent actions are performed, the lock is acquired and connection is always released the statements and rows are not holding the connection. Why is it useful. A very basic use case would be if you want to make functional tests you can prepare a test database and within each test you do not have to reload a database. All tests are isolated within transaction and though, performs fast. And you do not have to interface your sql.DB reference in your code, txdb is like a standard sql.Driver. This driver supports any sql.Driver connection to be opened. You can register txdb for different sql drivers and have it under different driver names. Under the hood whenever a txdb driver is opened, it attempts to open a real connection and starts transaction. When close is called, it rollbacks transaction leaving your prepared test database in the same state as before. Given, you have a mysql database called txdb_test and a table users with a username column. Example: Every time you will run this application, it will remain in the same state as before.

bíogo is a bioinformatics library for the Go language. It is a work in progress. bíogo stems from the need to address the size and structure of modern genomic and metagenomic data sets. These properties enforce requirements on the libraries and languages used for analysis: In addition to the computational burden of massive data set sizes in modern genomics there is an increasing need for complex pipelines to resolve questions in tightening problem space and also a developing need to be able to develop new algorithms to allow novel approaches to interesting questions. These issues suggest the need for a simplicity in syntax to facilitate: Related to the second issue is the reluctance of some researchers to release code because of quality concerns http://www.nature.com/news/2010/101013/full/467753a.html The issue of code release is the first of the principles formalised in the Science Code Manifesto http://sciencecodemanifesto.org/ A language with a simple, yet expressive, syntax should facilitate development of higher quality code and thus help reduce this barrier to research code release. It seems that nearly every language has it own bioinformatics library, some of which are very mature, for example BioPerl and BioPython. Why add another one? The different libraries excel in different fields, acting as scripting glue for applications in a pipeline (much of [1-3]) and interacting with external hosts [1, 2, 4, 5], wrapping lower level high performance languages with more user friendly syntax [1-4] or providing bioinformatics functions for high performance languages [5, 6]. The intended niche for bíogo lies somewhere between the scripting libraries and high performance language libraries in being easy to use for both small and large projects while having reasonable performance with computationally intensive tasks. The intent is to reduce the level of investment required to develop new research software for computationally intensive tasks. The bíogo library structure is influenced both by the structure of BioPerl and the Go core libraries. The coding style should be aligned with normal Go idioms as represented in the Go core libraries. Position numbering in the bíogo library conforms to the zero-based indexing of Go and range indexing conforms to Go's half-open zero-based slice indexing. This is at odds with the 'normal' inclusive indexing used by molecular biologists. This choice was made to avoid inconsistent indexing spaces being used — one-based inclusive for bíogo functions and methods and zero-based for native Go slices and arrays — and so avoid errors that this would otherwise facilitate. Note that the GFF package does allow, and defaults to, one-based inclusive indexing in its input and output of GFF files. Quality scores are supported for all sequence types, including protein. Phred and Solexa scoring systems are able to be read from files, however internal representation of quality scores is with Phred, so there will be precision loss in conversion. A Solexa quality score type is provided for use where this will be a problem. Copyright ©2011-2012 The bíogo Authors except where otherwise noted. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.

bíogo is a bioinformatics library for the Go language. It is a work in progress. bíogo stems from the need to address the size and structure of modern genomic and metagenomic data sets. These properties enforce requirements on the libraries and languages used for analysis: In addition to the computational burden of massive data set sizes in modern genomics there is an increasing need for complex pipelines to resolve questions in tightening problem space and also a developing need to be able to develop new algorithms to allow novel approaches to interesting questions. These issues suggest the need for a simplicity in syntax to facilitate: Related to the second issue is the reluctance of some researchers to release code because of quality concerns http://www.nature.com/news/2010/101013/full/467753a.html The issue of code release is the first of the principles formalised in the Science Code Manifesto http://sciencecodemanifesto.org/ A language with a simple, yet expressive, syntax should facilitate development of higher quality code and thus help reduce this barrier to research code release. It seems that nearly every language has it own bioinformatics library, some of which are very mature, for example BioPerl and BioPython. Why add another one? The different libraries excel in different fields, acting as scripting glue for applications in a pipeline (much of [1-3]) and interacting with external hosts [1, 2, 4, 5], wrapping lower level high performance languages with more user friendly syntax [1-4] or providing bioinformatics functions for high performance languages [5, 6]. The intended niche for bíogo lies somewhere between the scripting libraries and high performance language libraries in being easy to use for both small and large projects while having reasonable performance with computationally intensive tasks. The intent is to reduce the level of investment required to develop new research software for computationally intensive tasks. The bíogo library structure is influenced both by the structure of BioPerl and the Go core libraries. The coding style should be aligned with normal Go idioms as represented in the Go core libraries. Position numbering in the bíogo library conforms to the zero-based indexing of Go and range indexing conforms to Go's half-open zero-based slice indexing. This is at odds with the 'normal' inclusive indexing used by molecular biologists. This choice was made to avoid inconsistent indexing spaces being used — one-based inclusive for bíogo functions and methods and zero-based for native Go slices and arrays — and so avoid errors that this would otherwise facilitate. Note that the GFF package does allow, and defaults to, one-based inclusive indexing in its input and output of GFF files. Quality scores are supported for all sequence types, including protein. Phred and Solexa scoring systems are able to be read from files, however internal representation of quality scores is with Phred, so there will be precision loss in conversion. A Solexa quality score type is provided for use where this will be a problem. Copyright ©2011-2012 The bíogo Authors except where otherwise noted. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.

Package txdb is a single transaction based database sql driver. When the connection is opened, it starts a transaction and all operations performed on this *sql.DB will be within that transaction. If concurrent actions are performed, the lock is acquired and connection is always released the statements and rows are not holding the connection. Why is it useful. A very basic use case would be if you want to make functional tests you can prepare a test database and within each test you do not have to reload a database. All tests are isolated within transaction and though, performs fast. And you do not have to interface your sql.DB reference in your code, txdb is like a standard sql.Driver. This driver supports any sql.Driver connection to be opened. You can register txdb for different sql drivers and have it under different driver names. Under the hood whenever a txdb driver is opened, it attempts to open a real connection and starts transaction. When close is called, it rollbacks transaction leaving your prepared test database in the same state as before. Given, you have a mysql database called txdb_test and a table users with a username column. Example: Every time you will run this application, it will remain in the same state as before.

Package codec provides a High Performance, Feature-Rich Idiomatic Go 1.4+ codec/encoding library for binc, msgpack, cbor, json. Supported Serialization formats are: To install: This package will carefully use 'unsafe' for performance reasons in specific places. You can build without unsafe use by passing the safe or appengine tag i.e. 'go install -tags=safe ...'. Note that unsafe is only supported for the last 3 go sdk versions e.g. current go release is go 1.9, so we support unsafe use only from go 1.7+ . This is because supporting unsafe requires knowledge of implementation details. For detailed usage information, read the primer at http://ugorji.net/blog/go-codec-primer . The idiomatic Go support is as seen in other encoding packages in the standard library (ie json, xml, gob, etc). Rich Feature Set includes: Users can register a function to handle the encoding or decoding of their custom types. There are no restrictions on what the custom type can be. Some examples: As an illustration, MyStructWithUnexportedFields would normally be encoded as an empty map because it has no exported fields, while UUID would be encoded as a string. However, with extension support, you can encode any of these however you like. This package maintains symmetry in the encoding and decoding halfs. We determine how to encode or decode by walking this decision tree This symmetry is important to reduce chances of issues happening because the encoding and decoding sides are out of sync e.g. decoded via very specific encoding.TextUnmarshaler but encoded via kind-specific generalized mode. Consequently, if a type only defines one-half of the symmetry (e.g. it implements UnmarshalJSON() but not MarshalJSON() ), then that type doesn't satisfy the check and we will continue walking down the decision tree. RPC Client and Server Codecs are implemented, so the codecs can be used with the standard net/rpc package. The Handle is SAFE for concurrent READ, but NOT SAFE for concurrent modification. The Encoder and Decoder are NOT safe for concurrent use. Consequently, the usage model is basically: Sample usage model: To run tests, use the following: To run the full suite of tests, use the following: You can run the tag 'safe' to run tests or build in safe mode. e.g. Please see http://github.com/ugorji/go-codec-bench . Struct fields matching the following are ignored during encoding and decoding Every other field in a struct will be encoded/decoded. Embedded fields are encoded as if they exist in the top-level struct, with some caveats. See Encode documentation.

Package main is the UBNT edgeos-dnsmasq-blacklist dnsmasq DNS Blacklisting and Redirection. View the software license here (https://github.com/britannic/blacklist/blob/master/LICENSE.txt)Latest versionVersion (https://github.com/britannic/blacklist)Go documentationGoDoc (https://godoc.org/github.com/britannic/blacklist)Build status for this versionBuild Status (https://travis-ci.org/britannic/blacklist)Test coverage status for this versionCoverage Status (https://coveralls.io/github/britannic/blacklist?branch=master)Quality of Go code for this versionGo Report Card (https://goreportcard.com/report/github.com/britannic/blacklist) Follow the conversation @ community.ubnt.com (https://community.ubnt.com/t5/EdgeRouter/DNS-Adblocking-amp-Blacklisting-dnsmasq-Configuration/td-p/2215008/jump-to/first-unread-message "Follow the conversation about this software in the EdgeRouter forum (https://community.ubnt.com/t5/EdgeRouter/)") Please show your thanks by donating to the project using Securely send and receive cash without fees using Square CashSquare Cash (https://cash.me/$HelmRockSecurity/) or PayPal (https://www.paypal.me/helmrocksecurity/) Donate (https://cash.me/$HelmRockSecurity/5 "Give $5 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/10 "Give $10 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/15 "Give $15 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/20 "Give $20 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/25 "Give $25 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/50 "Give $50 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/100 "Give $100 using Square Cash (free money transfer)") Donate (https://cash.me/$HelmRockSecurity/ "Choose your own donation amount using Square Cash (free money transfer)") Donate (https://paypal.me/helmrocksecurity/5 "Give $5 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/10 "Give $10 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/15 "Give $15 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/20 "Give $20 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/25 "Give $25 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/50 "Give $50 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/100 "Give $100 using PayPal (PayPal money transfer)") Donate (https://paypal.me/helmrocksecurity/ "Choose your own donation amount using PayPal (PayPal money transfer)") We greatly appreciate any and all donations - Thank you! Funds go to maintaining development servers and networks. Note: This is 3rd party software and isn't supported or endorsed by Ubiquiti Networks® • Overview (#overview) • Donate (#donations-and-sponsorship) • Copyright (#copyright) • Licenses (#licenses) • Latest Version (#latest-version) • Change Log (https://github.com/britannic/blacklist/blob/master/CHANGELOG.md) • Features (#features) • Compatibility (#compatibility) • Installation (#installation) • Using apt-get (#apt-get-installation---erlite-3-erpoe-5-er-x-er-x-sfp--unifi-gateway-3) • Using dpkg (#dpkg-installation---best-for-disk-space-constrained-routers) • Upgrade (#upgrade) • Removal (#removal) • Frequently Asked Questions (#frequently-asked-questions) • Can I donate to project? (#donations-and-sponsorship) • Does the install backup my blacklist configuration before deleting it? (#does-the-install-backup-my-blacklist-configuration-before-deleting-it) • Does update-dnsmasq run automatically? (#does-update-dnsmasq-run-automatically) • How do I add or delete sources? (#how-do-i-add-or-delete-sources) • How do I back up my blacklist configuration and restore it later? (#how-do-i-back-up-my-blacklist-configuration-and-restore-it-later) • How do I configure dnsmasq? (#how-do-i-configure-dnsmasq) • How do I configure local file sources instead of internet based ones? (#how-do-i-configure-local-file-sources-instead-of-internet-based-ones) • How do I disable/enable dnsmasq blacklisting? (#how-do-i-disableenable-dnsmasq-blacklisting) • How do I exclude or include a host or a domain? (#how-do-i-exclude-or-include-a-host-or-a-domain) • How do I globally exclude or include hosts or a domains? (#how-do-i-globally-exclude-or-include-hosts-or-a-domains) • How do I use the command line switches? (#how-do-i-use-the-command-line-switches) • How do can keep my USG configuration after an upgrade, provision or reboot? (#how-do-can-keep-my-usg-configuration-after-an-upgrade-provision-or-reboot) • How does whitelisting work? (#how-does-whitelisting-work) • What is the difference between blocking domains and hosts? (#what-is-the-difference-between-blocking-domains-and-hosts) • Which blacklist sources are installed by default? (#which-blacklist-sources-are-installed-by-default) EdgeMax dnsmasq DNS blacklisting and redirection is inspired by the users at EdgeMAX Community (https://community.ubnt.com/t5/EdgeMAX/bd-p/EdgeMAX/) [Top] (#contents) • Copyright © Visit Helm Rock Consulting at https://www.helmrock.com/2019 Helm Rock Consulting (https://www.helmrock.com/) [Top] (#contents) Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. The views and conclusions contained in the software and documentation are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of the FreeBSD Project. [Top] (#contents) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Latest versionLatest (https://github.com/britannic/blacklist/releases/latest) Release v1.1.6.2 (April 24, 2018) • Code refactor • Global whitelist and blacklist configuration files now have their own prefix: "roots" i.e. [Top] (#contents) • See changelog (https://github.com/britannic/blacklist/blob/master/CHANGELOG.md) for details. [Top] (#contents) • Adds DNS blacklisting integration to the EdgeRouter configuration • Generates configuration files used directly by dnsmasq to redirect dns lookups • Integrated with the EdgeMax OS CLI • Any FQDN in the blacklist will force dnsmasq to return the configured dns redirect IP address [Top] (#contents) • edgeos-dnsmasq-blacklist has been tested on the EdgeRouter ERLite-3, ERPoe-5, ER-X and UniFi Security Gateway USG-3 routers • EdgeMAX versions: v1.9.7+hotfix.4-v1.10.1, UniFi: v4.4.12-v4.4.18 • integration could be adapted to work on VyOS and Vyatta derived ports, since EdgeOS is a fork and port of Vyatta 6.3 [Top] (#contents) • Using apt-get (#apt-get-installation---erlite-3-erpoe-5-er-x-er-x-sfp--unifi-gateway-3) - works for all routers • Using dpkg (#dpkg-installation---best-for-disk-space-constrained-routers) - best for disk space constrained routers [Top] (#contents) apt-get Installation - ERLite-3, ERPoe-5, ER-X, ER-X-SFP & UniFi-Gateway-3 • Add the blacklist debian package repository using the router's CLI shell • Add the GPG signing key • Update the system repositorities and install edgeos-dnsmasq-blacklist [Top] (#contents) dpkg Installation - best for disk space constrained routers EdgeRouter ERLite-3, ERPoe-5 & UniFi-Gateway-3 [Top] (#contents) EdgeRouter ER-X & ER-X-SFP • Ensure the router has enough space, by removing unnecessary files • Now download and install the edgeos-dnsmasq-blacklist package [Top] (#contents) • If the repository is set up and you are using apt-get: • Note, if you are using dpkg, it cannot upgrade packages, so follow these instructions (#dpkg-installation---best-for-disk-space-constrained-routers) and the previous package version will be automatically removed before the new package version is installed [Top] (#contents) EdgeMAX - All Platforms [Top] (#contents) How do I disable/enable dnsmasq blacklisting? • Use these CLI configure commands: • Disable: • Enable: [Top] (#contents) Does the install backup my blacklist configuration before deleting it? • If a blacklist configuration already exists, the install routine will automatically back it up to /config/user-data/blacklist.$(date +'%FT%H%M%S').cmds [Top] (#contents) How do I back up my blacklist configuration and restore it later? • use the following commands (make a note of the file name): • After installing the latest version, you can merge your backed up configuration: • If you prefer to delete the default configuration and restore your previous configuration, run these commands: [Top] (#contents) Which blacklist sources are installed by default? • You can use this command in the CLI shell to view the current sources after installation or view the log and see previous downloads: [Top] (#contents) How do I configure local file sources instead of internet based ones? • Use these commands to configure a local file source • File contents example for /config/user-data/blist.hosts.src: [Top] (#contents) How do can keep my USG configuration after an upgrade, provision or reboot? • Follow these instructions (https://britannic.github.io/install-edgeos-packages/) on how to automatically install edgeos-dnsmasq-blacklist • Create a config.gateway.json file following these instructions (https://help.ubnt.com/hc/en-us/articles/215458888-UniFi-How-to-further-customize-USG-configuration-with-config-gateway-json) • Here's a sample config.gateway.json (https://raw.githubusercontent.com/britannic/blacklist/master/config.gateway.json) [Top] (#contents) How do I add or delete sources? • Using the CLI configure command, to delete domains and hosts sources: • To add a source, first check it can serve a text list and also note the prefix (if any) before the hosts or domains, e.g. http://www.malwaredomainlist.com/ (http://www.malwaredomainlist.com/) has this format: • So the prefix is "127.0.0.1 " • Here's how to creating the source in the CLI: [Top] (#contents) How do I globally exclude or include hosts or a domains? • Use these example commands to globally include or exclude blacklisted entries: [Top] (#contents) How do I exclude or include a host or a domain? • Use these example commands to include or exclude blacklisted entries: [Top] (#contents) How does whitelisting work? *dnsmasq will whitelist any entries in the configuration file domains and hosts (servers) with a hash in place of an IP address (the "#" force dnsmasq to forward the DNS request to the router's configured nameservers) • i.e. servers (hosts) • i.e. domains [Top] (#contents) Does update-dnsmasq run automatically? • Yes, a scheduled task is created and run daily at midnight with a random start delay is used ensure other routers in the same time zone won't overload the source servers. • The random start delay window is configured in seconds using this command - this example sets the start delay between 1-10800 seconds (0-3 hours): • It can be reconfigured using these CLI configuration commands: • For example, to change the execution interval to every 6 hours, use this command: • In daily use, no additional interaction with update-dnsmasq is required. By default, cron will run update-dnsmasq at midnight each day to download the blacklist sources and update the dnsmasq configuration files in /etc/dnsmasq.d. dnsmasq will automatically be reloaded after the configuration file update is completed. [Top] (#contents) How do I use the command line switches? • update-dnsmasq has the following commandline switches available: [Top] (#contents) How do I configure dnsmasq? • dnsmasq may need to be configured to ensure blacklisting works correctly • Here is an example using the EdgeOS configuration shell [Top] (#contents) What is the difference between blocking domains and hosts? • The difference lies in the order of update-dnsmasq's processing algorithm. Domains are processed first and take precedence over hosts, so that a blacklisted domain will force update-dnsmasq's source parser to exclude subsequent hosts from the same domain. This reduces dnsmasq's list of lookups, since it will automatically redirect hosts for a blacklisted domain. [Top] (#contents) blacklist

bindata converts any file into managable Go source code. Useful for embedding binary data into a go program. The file data is optionally gzip compressed before being converted to a raw byte slice. The following paragraphs cover some of the customization options which can be specified in the Config struct, which must be passed into the Translate() call. When used with the `Debug` option, the generated code does not actually include the asset data. Instead, it generates function stubs which load the data from the original file on disk. The asset API remains identical between debug and release builds, so your code will not have to change. This is useful during development when you expect the assets to change often. The host application using these assets uses the same API in both cases and will not have to care where the actual data comes from. An example is a Go webserver with some embedded, static web content like HTML, JS and CSS files. While developing it, you do not want to rebuild the whole server and restart it every time you make a change to a bit of javascript. You just want to build and launch the server once. Then just press refresh in the browser to see those changes. Embedding the assets with the `debug` flag allows you to do just that. When you are finished developing and ready for deployment, just re-invoke `go-bindata` without the `-debug` flag. It will now embed the latest version of the assets. The `NoMemCopy` option will alter the way the output file is generated. It will employ a hack that allows us to read the file data directly from the compiled program's `.rodata` section. This ensures that when we call call our generated function, we omit unnecessary memcopies. The downside of this, is that it requires dependencies on the `reflect` and `unsafe` packages. These may be restricted on platforms like AppEngine and thus prevent you from using this mode. Another disadvantage is that the byte slice we create, is strictly read-only. For most use-cases this is not a problem, but if you ever try to alter the returned byte slice, a runtime panic is thrown. Use this mode only on target platforms where memory constraints are an issue. The default behaviour is to use the old code generation method. This prevents the two previously mentioned issues, but will employ at least one extra memcopy and thus increase memory requirements. For instance, consider the following two examples: This would be the default mode, using an extra memcopy but gives a safe implementation without dependencies on `reflect` and `unsafe`: Here is the same functionality, but uses the `.rodata` hack. The byte slice returned from this example can not be written to without generating a runtime error. The NoCompress option indicates that the supplied assets are *not* GZIP compressed before being turned into Go code. The data should still be accessed through a function call, so nothing changes in the API. This feature is useful if you do not care for compression, or the supplied resource is already compressed. Doing it again would not add any value and may even increase the size of the data. The default behaviour of the program is to use compression. The keys used in the `_bindata` map are the same as the input file name passed to `go-bindata`. This includes the path. In most cases, this is not desireable, as it puts potentially sensitive information in your code base. For this purpose, the tool supplies another command line flag `-prefix`. This accepts a portion of a path name, which should be stripped off from the map keys and function names. For example, running without the `-prefix` flag, we get: Running with the `-prefix` flag, we get: With the optional Tags field, you can specify any go build tags that must be fulfilled for the output file to be included in a build. This is useful when including binary data in multiple formats, where the desired format is specified at build time with the appropriate tags. The tags are appended to a `// +build` line in the beginning of the output file and must follow the build tags syntax specified by the go tool.

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go If you are trying to make a PUT/POST API call with binary request body, please make sure the binary request body is resettable, which means the request body should inherit Seeker interface. The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go If you are trying to make a PUT/POST API call with binary request body, please make sure the binary request body is resettable, which means the request body should inherit Seeker interface. The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

This is the official Go SDK for Oracle Cloud Infrastructure Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#installing for installation instructions. Refer to https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring for configuration instructions. The following example shows how to get started with the SDK. The example belows creates an identityClient struct with the default configuration. It then utilizes the identityClient to list availability domains and prints them out to stdout More examples can be found in the SDK Github repo: https://github.com/oracle/oci-go-sdk/tree/master/example Optional fields are represented with the `mandatory:"false"` tag on input structs. The SDK will omit all optional fields that are nil when making requests. In the case of enum-type fields, the SDK will omit fields whose value is an empty string. The SDK uses pointers for primitive types in many input structs. To aid in the construction of such structs, the SDK provides functions that return a pointer for a given value. For example: The SDK exposes functionality that allows the user to customize any http request before is sent to the service. You can do so by setting the `Interceptor` field in any of the `Client` structs. For example: The Interceptor closure gets called before the signing process, thus any changes done to the request will be properly signed and submitted to the service. The SDK exposes a stand-alone signer that can be used to signing custom requests. Related code can be found here: https://github.com/oracle/oci-go-sdk/blob/master/common/http_signer.go. The example below shows how to create a default signer. The signer also allows more granular control on the headers used for signing. For example: You can combine a custom signer with the exposed clients in the SDK. This allows you to add custom signed headers to the request. Following is an example: Bear in mind that some services have a white list of headers that it expects to be signed. Therefore, adding an arbitrary header can result in authentications errors. To see a runnable example, see https://github.com/oracle/oci-go-sdk/blob/master/example/example_identity_test.go For more information on the signing algorithm refer to: https://docs.cloud.oracle.com/Content/API/Concepts/signingrequests.htm Some operations accept or return polymorphic JSON objects. The SDK models such objects as interfaces. Further the SDK provides structs that implement such interfaces. Thus, for all operations that expect interfaces as input, pass the struct in the SDK that satisfies such interface. For example: In the case of a polymorphic response you can type assert the interface to the expected type. For example: An example of polymorphic JSON request handling can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_test.go#L63 When calling a list operation, the operation will retrieve a page of results. To retrieve more data, call the list operation again, passing in the value of the most recent response's OpcNextPage as the value of Page in the next list operation call. When there is no more data the OpcNextPage field will be nil. An example of pagination using this logic can be found here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_core_pagination_test.go The SDK has a built-in logging mechanism used internally. The internal logging logic is used to record the raw http requests, responses and potential errors when (un)marshalling request and responses. Built-in logging in the SDK is controlled via the environment variable "OCI_GO_SDK_DEBUG" and its contents. The below are possible values for the "OCI_GO_SDK_DEBUG" variable 1. "info" or "i" enables all info logging messages 2. "debug" or "d" enables all debug and info logging messages 3. "verbose" or "v" or "1" enables all verbose, debug and info logging messages 4. "null" turns all logging messages off. If the value of the environment variable does not match any of the above then default logging level is "info". If the environment variable is not present then no logging messages are emitted. The default destination for logging is Stderr and if you want to output log to a file you can set via environment variable "OCI_GO_SDK_LOG_OUTPUT_MODE". The below are possible values 1. "file" or "f" enables all logging output saved to file 2. "combine" or "c" enables all logging output to both stderr and file You can also customize the log file location and name via "OCI_GO_SDK_LOG_FILE" environment variable, the value should be the path to a specific file If this environment variable is not present, the default location will be the project root path Sometimes you may need to wait until an attribute of a resource, such as an instance or a VCN, reaches a certain state. An example of this would be launching an instance and then waiting for the instance to become available, or waiting until a subnet in a VCN has been terminated. You might also want to retry the same operation again if there's network issue etc... This can be accomplished by using the RequestMetadata.RetryPolicy(request level configuration), alternatively, global(all services) or client level RetryPolicy configration is also possible. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_retry_test.go If you are trying to make a PUT/POST API call with binary request body, please make sure the binary request body is resettable, which means the request body should inherit Seeker interface. The Retry behavior Precedence (Highest to lowest) is defined as below:- The OCI Go SDK defines a default retry policy that retries on the errors suitable for retries (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm), for a recommended period of time (up to 7 attempts spread out over at most approximately 1.5 minutes). The default retry policy is defined by : Default Retry-able Errors Below is the list of default retry-able errors for which retry attempts should be made. The following errors should be retried (with backoff). HTTP Code Customer-facing Error Code Apart from the above errors, retries should also be attempted in the following Client Side errors : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) The above errors can be avoided through retrying and hence, are classified as the default retry-able errors. Additionally, retries should also be made for Circuit Breaker exceptions (Exceptions raised by Circuit Breaker in an open state) Default Termination Strategy The termination strategy defines when SDKs should stop attempting to retry. In other words, it's the deadline for retries. The OCI SDKs should stop retrying the operation after 7 retry attempts. This means the SDKs will have retried for ~98 seconds or ~1.5 minutes have elapsed due to total delays. SDKs will make a total of 8 attempts. (1 initial request + 7 retries) Default Delay Strategy Default Delay Strategy - The delay strategy defines the amount of time to wait between each of the retry attempts. The default delay strategy chosen for the SDK – Exponential backoff with jitter, using: 1. The base time to use in retry calculations will be 1 second 2. An exponent of 2. When calculating the next retry time, the SDK will raise this to the power of the number of attempts 3. A maximum wait time between calls of 30 seconds (Capped) 4. Added jitter value between 0-1000 milliseconds to spread out the requests Configure and use default retry policy You can set this retry policy for a single request: or for all requests made by a client: or for all requests made by all clients: or setting default retry via environment varaible, which is a global switch for all services: Some services enable retry for operations by default, this can be overridden using any alternatives mentioned above. To know which service operations have retries enabled by default, look at the operation's description in the SDK - it will say whether that it has retries enabled by default Some resources may have to be replicated across regions and are only eventually consistent. That means the request to create, update, or delete the resource succeeded, but the resource is not available everywhere immediately. Creating, updating, or deleting any resource in the Identity service is affected by eventual consistency, and doing so may cause other operations in other services to fail until the Identity resource has been replicated. For example, the request to CreateTag in the Identity service in the home region succeeds, but immediately using that created tag in another region in a request to LaunchInstance in the Compute service may fail. If you are creating, updating, or deleting resources in the Identity service, we recommend using an eventually consistent retry policy for any service you access. The default retry policy already deals with eventual consistency. Example: This retry policy will use a different strategy if an eventually consistent change was made in the recent past (called the "eventually consistent window", currently defined to be 4 minutes after the eventually consistent change). This special retry policy for eventual consistency will: 1. make up to 9 attempts (including the initial attempt); if an attempt is successful, no more attempts will be made 2. retry at most until (a) approximately the end of the eventually consistent window or (b) the end of the default retry period of about 1.5 minutes, whichever is farther in the future; if an attempt is successful, no more attempts will be made, and the OCI Go SDK will not wait any longer 3. retry on the error codes 400-RelatedResourceNotAuthorizedOrNotFound, 404-NotAuthorizedOrNotFound, and 409-NotAuthorizedOrResourceAlreadyExists, for which the default retry policy does not retry, in addition to the errors the default retry policy retries on (see https://docs.oracle.com/en-us/iaas/Content/API/References/apierrors.htm) If there were no eventually consistent actions within the recent past, then this special retry strategy is not used. If you want a retry policy that does not handle eventual consistency in a special way, for example because you retry on all error responses, you can use DefaultRetryPolicyWithoutEventualConsistency or NewRetryPolicyWithOptions with the common.ReplaceWithValuesFromRetryPolicy(common.DefaultRetryPolicyWithoutEventualConsistency()) option: The NewRetryPolicy function also creates a retry policy without eventual consistency. Circuit Breaker can prevent an application repeatedly trying to execute an operation that is likely to fail, allowing it to continue without waiting for the fault to be rectified or wasting CPU cycles, of course, it also enables an application to detect whether the fault has been resolved. If the problem appears to have been rectified, the application can attempt to invoke the operation. Go SDK intergrates sony/gobreaker solution, wraps in a circuit breaker object, which monitors for failures. Once the failures reach a certain threshold, the circuit breaker trips, and all further calls to the circuit breaker return with an error, this also saves the service from being overwhelmed with network calls in case of an outage. Circuit Breaker Configuration Definitions 1. Failure Rate Threshold - The state of the CircuitBreaker changes from CLOSED to OPEN when the failure rate is equal or greater than a configurable threshold. For example when more than 50% of the recorded calls have failed. 2. Reset Timeout - The timeout after which an open circuit breaker will attempt a request if a request is made 3. Failure Exceptions - The list of Exceptions that will be regarded as failures for the circuit. 4. Minimum number of calls/ Volume threshold - Configures the minimum number of calls which are required (per sliding window period) before the CircuitBreaker can calculate the error rate. 1. Failure Rate Threshold - 80% - This means when 80% of the requests calculated for a time window of 120 seconds have failed then the circuit will transition from closed to open. 2. Minimum number of calls/ Volume threshold - A value of 10, for the above defined time window of 120 seconds. 3. Reset Timeout - 30 seconds to wait before setting the breaker to halfOpen state, and trying the action again. 4. Failure Exceptions - The failures for the circuit will only be recorded for the retryable/transient exceptions. This means only the following exceptions will be regarded as failure for the circuit. HTTP Code Customer-facing Error Code Apart from the above, the following client side exceptions will also be treated as a failure for the circuit : 1. HTTP Connection timeout 2. Request Connection Errors 3. Request Exceptions 4. Other timeouts (like Read Timeout) Go SDK enable circuit breaker with default configuration for most of the service clients, if you don't want to enable the solution, can disable the functionality before your application running Go SDK also supports customize Circuit Breaker with specified configurations. You can find the examples here: https://github.com/oracle/oci-go-sdk/blob/master/example/example_circuitbreaker_test.go To know which service clients have circuit breakers enabled, look at the service client's description in the SDK - it will say whether that it has circuit breakers enabled by default The GO SDK uses the net/http package to make calls to OCI services. If your environment requires you to use a proxy server for outgoing HTTP requests then you can set this up in the following ways: 1. Configuring environment variable as described here https://golang.org/pkg/net/http/#ProxyFromEnvironment 2. Modifying the underlying Transport struct for a service client In order to modify the underlying Transport struct in HttpClient, you can do something similar to (sample code for audit service client): The Object Storage service supports multipart uploads to make large object uploads easier by splitting the large object into parts. The Go SDK supports raw multipart upload operations for advanced use cases, as well as a higher level upload class that uses the multipart upload APIs. For links to the APIs used for multipart upload operations, see Managing Multipart Uploads (https://docs.cloud.oracle.com/iaas/Content/Object/Tasks/usingmultipartuploads.htm). Higher level multipart uploads are implemented using the UploadManager, which will: split a large object into parts for you, upload the parts in parallel, and then recombine and commit the parts as a single object in storage. This code sample shows how to use the UploadManager to automatically split an object into parts for upload to simplify interaction with the Object Storage service: https://github.com/oracle/oci-go-sdk/blob/master/example/example_objectstorage_test.go Some response fields are enum-typed. In the future, individual services may return values not covered by existing enums for that field. To address this possibility, every enum-type response field is a modeled as a type that supports any string. Thus if a service returns a value that is not recognized by your version of the SDK, then the response field will be set to this value. When individual services return a polymorphic JSON response not available as a concrete struct, the SDK will return an implementation that only satisfies the interface modeling the polymorphic JSON response. If you are using a version of the SDK released prior to the announcement of a new region, you may need to use a workaround to reach it, depending on whether the region is in the oraclecloud.com realm. A region is a localized geographic area. For more information on regions and how to identify them, see Regions and Availability Domains(https://docs.cloud.oracle.com/iaas/Content/General/Concepts/regions.htm). A realm is a set of regions that share entities. You can identify your realm by looking at the domain name at the end of the network address. For example, the realm for xyz.abc.123.oraclecloud.com is oraclecloud.com. oraclecloud.com Realm: For regions in the oraclecloud.com realm, even if common.Region does not contain the new region, the forward compatibility of the SDK can automatically handle it. You can pass new region names just as you would pass ones that are already defined. For more information on passing region names in the configuration, see Configuring (https://github.com/oracle/oci-go-sdk/blob/master/README.md#configuring). For details on common.Region, see (https://github.com/oracle/oci-go-sdk/blob/master/common/common.go). Other Realms: For regions in realms other than oraclecloud.com, you can use the following workarounds to reach new regions with earlier versions of the SDK. NOTE: Be sure to supply the appropriate endpoints for your region. You can overwrite the target host with client.Host: If you are authenticating via instance principals, you can set the authentication endpoint in an environment variable: Got a fix for a bug, or a new feature you'd like to contribute? The SDK is open source and accepting pull requests on GitHub https://github.com/oracle/oci-go-sdk Licensing information available at: https://github.com/oracle/oci-go-sdk/blob/master/LICENSE.txt To be notified when a new version of the Go SDK is released, subscribe to the following feed: https://github.com/oracle/oci-go-sdk/releases.atom Please refer to this link: https://github.com/oracle/oci-go-sdk#help

Package gcfg reads "INI-style" text-based configuration files with "name=value" pairs grouped into sections (gcfg files). This package is still a work in progress; see the sections below for planned changes. The syntax is based on that used by git config: http://git-scm.com/docs/git-config#_syntax . There are some (planned) differences compared to the git config format: The functions in this package read values into a user-defined struct. Each section corresponds to a struct field in the config struct, and each variable in a section corresponds to a data field in the section struct. The mapping of each section or variable name to fields is done either based on the "gcfg" struct tag or by matching the name of the section or variable, ignoring case. In the latter case, hyphens '-' in section and variable names correspond to underscores '_' in field names. Fields must be exported; to use a section or variable name starting with a letter that is neither upper- or lower-case, prefix the field name with 'X'. (See https://code.google.com/p/go/issues/detail?id=5763#c4 .) For sections with subsections, the corresponding field in config must be a map, rather than a struct, with string keys and pointer-to-struct values. Values for subsection variables are stored in the map with the subsection name used as the map key. (Note that unlike section and variable names, subsection names are case sensitive.) When using a map, and there is a section with the same section name but without a subsection name, its values are stored with the empty string used as the key. It is possible to provide default values for subsections in the section "default-<sectionname>" (or by setting values in the corresponding struct field "Default_<sectionname>"). The functions in this package panic if config is not a pointer to a struct, or when a field is not of a suitable type (either a struct or a map with string keys and pointer-to-struct values). The section structs in the config struct may contain single-valued or multi-valued variables. Variables of unnamed slice type (that is, a type starting with `[]`) are treated as multi-value; all others (including named slice types) are treated as single-valued variables. Single-valued variables are handled based on the type as follows. Unnamed pointer types (that is, types starting with `*`) are dereferenced, and if necessary, a new instance is allocated. For types implementing the encoding.TextUnmarshaler interface, the UnmarshalText method is used to set the value. Implementing this method is the recommended way for parsing user-defined types. For fields of string kind, the value string is assigned to the field, after unquoting and unescaping as needed. For fields of bool kind, the field is set to true if the value is "true", "yes", "on" or "1", and set to false if the value is "false", "no", "off" or "0", ignoring case. In addition, single-valued bool fields can be specified with a "blank" value (variable name without equals sign and value); in such case the value is set to true. Predefined integer types [u]int(|8|16|32|64) and big.Int are parsed as decimal or hexadecimal (if having '0x' prefix). (This is to prevent unintuitively handling zero-padded numbers as octal.) Other types having [u]int* as the underlying type, such as os.FileMode and uintptr allow decimal, hexadecimal, or octal values. Parsing mode for integer types can be overridden using the struct tag option ",int=mode" where mode is a combination of the 'd', 'h', and 'o' characters (each standing for decimal, hexadecimal, and octal, respectively.) All other types are parsed using fmt.Sscanf with the "%v" verb. For multi-valued variables, each individual value is parsed as above and appended to the slice. If the first value is specified as a "blank" value (variable name without equals sign and value), a new slice is allocated; that is any values previously set in the slice will be ignored. The types subpackage for provides helpers for parsing "enum-like" and integer types. There are 3 types of errors: Programmer errors trigger panics. These are should be fixed by the programmer before releasing code that uses gcfg. Data errors cause gcfg to return a non-nil error value. This includes the case when there are extra unknown key-value definitions in the configuration data (extra data). However, in some occasions it is desirable to be able to proceed in situations when the only data error is that of extra data. These errors are handled at a different (warning) priority and can be filtered out programmatically. To ignore extra data warnings, wrap the gcfg.Read*Into invocation into a call to gcfg.FatalOnly. The following is a list of changes under consideration:

Package pgx is a PostgreSQL database driver. pgx provides lower level access to PostgreSQL than the standard database/sql. It remains as similar to the database/sql interface as possible while providing better speed and access to PostgreSQL specific features. Import github.com/jackc/pgx/stdlib to use pgx as a database/sql compatible driver. pgx implements Query and Scan in the familiar database/sql style. pgx also implements QueryRow in the same style as database/sql. Use Exec to execute a query that does not return a result set. Connection pool usage is explicit and configurable. In pgx, a connection can be created and managed directly, or a connection pool with a configurable maximum connections can be used. The connection pool offers an after connect hook that allows every connection to be automatically setup before being made available in the connection pool. It delegates methods such as QueryRow to an automatically checked out and released connection so you can avoid manually acquiring and releasing connections when you do not need that level of control. pgx maps between all common base types directly between Go and PostgreSQL. In particular: pgx can map nulls in two ways. The first is package pgtype provides types that have a data field and a status field. They work in a similar fashion to database/sql. The second is to use a pointer to a pointer. pgx maps between int16, int32, int64, float32, float64, and string Go slices and the equivalent PostgreSQL array type. Go slices of native types do not support nulls, so if a PostgreSQL array that contains a null is read into a native Go slice an error will occur. The pgtype package includes many more array types for PostgreSQL types that do not directly map to native Go types. pgx includes built-in support to marshal and unmarshal between Go types and the PostgreSQL JSON and JSONB. pgx encodes from net.IPNet to and from inet and cidr PostgreSQL types. In addition, as a convenience pgx will encode from a net.IP; it will assume a /32 netmask for IPv4 and a /128 for IPv6. pgx includes support for the common data types like integers, floats, strings, dates, and times that have direct mappings between Go and SQL. In addition, pgx uses the github.com/jackc/pgx/pgtype library to support more types. See documention for that library for instructions on how to implement custom types. See example_custom_type_test.go for an example of a custom type for the PostgreSQL point type. pgx also includes support for custom types implementing the database/sql.Scanner and database/sql/driver.Valuer interfaces. If pgx does cannot natively encode a type and that type is a renamed type (e.g. type MyTime time.Time) pgx will attempt to encode the underlying type. While this is usually desired behavior it can produce suprising behavior if one the underlying type and the renamed type each implement database/sql interfaces and the other implements pgx interfaces. It is recommended that this situation be avoided by implementing pgx interfaces on the renamed type. []byte passed as arguments to Query, QueryRow, and Exec are passed unmodified to PostgreSQL. Transactions are started by calling Begin or BeginEx. The BeginEx variant can create a transaction with a specified isolation level. Use CopyFrom to efficiently insert multiple rows at a time using the PostgreSQL copy protocol. CopyFrom accepts a CopyFromSource interface. If the data is already in a [][]interface{} use CopyFromRows to wrap it in a CopyFromSource interface. Or implement CopyFromSource to avoid buffering the entire data set in memory. CopyFrom can be faster than an insert with as few as 5 rows. pgx can listen to the PostgreSQL notification system with the WaitForNotification function. It takes a maximum time to wait for a notification. The pgx ConnConfig struct has a TLSConfig field. If this field is nil, then TLS will be disabled. If it is present, then it will be used to configure the TLS connection. This allows total configuration of the TLS connection. pgx has never explicitly supported Postgres < 9.6's `ssl_renegotiation` option. As of v3.3.0, it doesn't send `ssl_renegotiation: 0` either to support Redshift (https://github.com/jackc/pgx/pull/476). If you need TLS Renegotiation, consider supplying `ConnConfig.TLSConfig` with a non-zero `Renegotiation` value and if it's not the default on your server, set `ssl_renegotiation` via `ConnConfig.RuntimeParams`. pgx defines a simple logger interface. Connections optionally accept a logger that satisfies this interface. Set LogLevel to control logging verbosity. Adapters for github.com/inconshreveable/log15, github.com/sirupsen/logrus, and the testing log are provided in the log directory.

Package gcfg reads "INI-style" text-based configuration files with "name=value" pairs grouped into sections (gcfg files). This package is still a work in progress; see the sections below for planned changes. The syntax is based on that used by git config: http://git-scm.com/docs/git-config#_syntax . There are some (planned) differences compared to the git config format: The functions in this package read values into a user-defined struct. Each section corresponds to a struct field in the config struct, and each variable in a section corresponds to a data field in the section struct. The mapping of each section or variable name to fields is done either based on the "gcfg" struct tag or by matching the name of the section or variable, ignoring case. In the latter case, hyphens '-' in section and variable names correspond to underscores '_' in field names. Fields must be exported; to use a section or variable name starting with a letter that is neither upper- or lower-case, prefix the field name with 'X'. (See https://code.google.com/p/go/issues/detail?id=5763#c4 .) For sections with subsections, the corresponding field in config must be a map, rather than a struct, with string keys and pointer-to-struct values. Values for subsection variables are stored in the map with the subsection name used as the map key. (Note that unlike section and variable names, subsection names are case sensitive.) When using a map, and there is a section with the same section name but without a subsection name, its values are stored with the empty string used as the key. It is possible to provide default values for subsections in the section "default-<sectionname>" (or by setting values in the corresponding struct field "Default_<sectionname>"). The functions in this package panic if config is not a pointer to a struct, or when a field is not of a suitable type (either a struct or a map with string keys and pointer-to-struct values). The section structs in the config struct may contain single-valued or multi-valued variables. Variables of unnamed slice type (that is, a type starting with `[]`) are treated as multi-value; all others (including named slice types) are treated as single-valued variables. Single-valued variables are handled based on the type as follows. Unnamed pointer types (that is, types starting with `*`) are dereferenced, and if necessary, a new instance is allocated. For types implementing the encoding.TextUnmarshaler interface, the UnmarshalText method is used to set the value. Implementing this method is the recommended way for parsing user-defined types. For fields of string kind, the value string is assigned to the field, after unquoting and unescaping as needed. For fields of bool kind, the field is set to true if the value is "true", "yes", "on" or "1", and set to false if the value is "false", "no", "off" or "0", ignoring case. In addition, single-valued bool fields can be specified with a "blank" value (variable name without equals sign and value); in such case the value is set to true. Predefined integer types [u]int(|8|16|32|64) and big.Int are parsed as decimal or hexadecimal (if having '0x' prefix). (This is to prevent unintuitively handling zero-padded numbers as octal.) Other types having [u]int* as the underlying type, such as os.FileMode and uintptr allow decimal, hexadecimal, or octal values. Parsing mode for integer types can be overridden using the struct tag option ",int=mode" where mode is a combination of the 'd', 'h', and 'o' characters (each standing for decimal, hexadecimal, and octal, respectively.) All other types are parsed using fmt.Sscanf with the "%v" verb. For multi-valued variables, each individual value is parsed as above and appended to the slice. If the first value is specified as a "blank" value (variable name without equals sign and value), a new slice is allocated; that is any values previously set in the slice will be ignored. The types subpackage for provides helpers for parsing "enum-like" and integer types. There are 3 types of errors: Programmer errors trigger panics. These are should be fixed by the programmer before releasing code that uses gcfg. Data errors cause gcfg to return a non-nil error value. This includes the case when there are extra unknown key-value definitions in the configuration data (extra data). However, in some occasions it is desirable to be able to proceed in situations when the only data error is that of extra data. These errors are handled at a different (warning) priority and can be filtered out programmatically. To ignore extra data warnings, wrap the gcfg.Read*Into invocation into a call to gcfg.FatalOnly. The following is a list of changes under consideration:

Package gcfg reads "INI-style" text-based configuration files with "name=value" pairs grouped into sections (gcfg files). This package is still a work in progress; see the sections below for planned changes. The syntax is based on that used by git config: http://git-scm.com/docs/git-config#_syntax . There are some (planned) differences compared to the git config format: The functions in this package read values into a user-defined struct. Each section corresponds to a struct field in the config struct, and each variable in a section corresponds to a data field in the section struct. The mapping of each section or variable name to fields is done either based on the "gcfg" struct tag or by matching the name of the section or variable, ignoring case. In the latter case, hyphens '-' in section and variable names correspond to underscores '_' in field names. Fields must be exported; to use a section or variable name starting with a letter that is neither upper- or lower-case, prefix the field name with 'X'. (See https://code.google.com/p/go/issues/detail?id=5763#c4 .) For sections with subsections, the corresponding field in config must be a map, rather than a struct, with string keys and pointer-to-struct values. Values for subsection variables are stored in the map with the subsection name used as the map key. (Note that unlike section and variable names, subsection names are case sensitive.) When using a map, and there is a section with the same section name but without a subsection name, its values are stored with the empty string used as the key. It is possible to provide default values for subsections in the section "default-<sectionname>" (or by setting values in the corresponding struct field "Default_<sectionname>"). The functions in this package panic if config is not a pointer to a struct, or when a field is not of a suitable type (either a struct or a map with string keys and pointer-to-struct values). The section structs in the config struct may contain single-valued or multi-valued variables. Variables of unnamed slice type (that is, a type starting with `[]`) are treated as multi-value; all others (including named slice types) are treated as single-valued variables. Single-valued variables are handled based on the type as follows. Unnamed pointer types (that is, types starting with `*`) are dereferenced, and if necessary, a new instance is allocated. For types implementing the encoding.TextUnmarshaler interface, the UnmarshalText method is used to set the value. Implementing this method is the recommended way for parsing user-defined types. For fields of string kind, the value string is assigned to the field, after unquoting and unescaping as needed. For fields of bool kind, the field is set to true if the value is "true", "yes", "on" or "1", and set to false if the value is "false", "no", "off" or "0", ignoring case. In addition, single-valued bool fields can be specified with a "blank" value (variable name without equals sign and value); in such case the value is set to true. Predefined integer types [u]int(|8|16|32|64) and big.Int are parsed as decimal or hexadecimal (if having '0x' prefix). (This is to prevent unintuitively handling zero-padded numbers as octal.) Other types having [u]int* as the underlying type, such as os.FileMode and uintptr allow decimal, hexadecimal, or octal values. Parsing mode for integer types can be overridden using the struct tag option ",int=mode" where mode is a combination of the 'd', 'h', and 'o' characters (each standing for decimal, hexadecimal, and octal, respectively.) All other types are parsed using fmt.Sscanf with the "%v" verb. For multi-valued variables, each individual value is parsed as above and appended to the slice. If the first value is specified as a "blank" value (variable name without equals sign and value), a new slice is allocated; that is any values previously set in the slice will be ignored. The types subpackage for provides helpers for parsing "enum-like" and integer types. There are 3 types of errors: Programmer errors trigger panics. These are should be fixed by the programmer before releasing code that uses gcfg. Data errors cause gcfg to return a non-nil error value. This includes the case when there are extra unknown key-value definitions in the configuration data (extra data). However, in some occasions it is desirable to be able to proceed in situations when the only data error is that of extra data. These errors are handled at a different (warning) priority and can be filtered out programmatically. To ignore extra data warnings, wrap the gcfg.Read*Into invocation into a call to gcfg.FatalOnly. The following is a list of changes under consideration:

Package redisc implements a redis cluster client on top of the redigo client package. It supports all commands that can be executed on a redis cluster, including pub-sub, scripts and read-only connections to read data from replicas. See http://redis.io/topics/cluster-spec for details. The package defines two main types: Cluster and Conn. Both are described in more details below, but the Cluster manages the mapping of keys (or more exactly, hash slots computed from keys) to a group of nodes that form a redis cluster, and a Conn manages a connection to this cluster. The package is designed such that for simple uses, or when keys have been carefully named to play well with a redis cluster, a Cluster value can be used as a drop-in replacement for a redis.Pool from the redigo package. Similarly, the Conn type implements redigo's redis.Conn interface (and the augmented redis.ConnWithTimeout one too), so the API to execute commands is the same - in fact the redisc package uses the redigo package as its only third-party dependency. When more control is needed, the package offers some extra behaviour specific to working with a redis cluster: Slot and SplitBySlot functions to compute the slot for a given key and to split a list of keys into groups of keys from the same slot, so that each group can safely be handled using the same connection. *Conn.Bind (or the BindConn package-level helper function) to explicitly specify the keys that will be used with the connection so that the right node is selected, instead of relying on the automatic detection based on the first parameter of the command. *Conn.ReadOnly (or the ReadOnlyConn package-level helper function) to mark a connection as read-only, allowing commands to be served by a replica instead of the master. RetryConn to wrap a connection into one that automatically follows redirections when the cluster moves slots around. Helper functions to deal with cluster-specific errors. The Cluster type manages a redis cluster and offers an interface compatible with redigo's redis.Pool: Along with some additional methods specific to a cluster: If the CreatePool function field is set, then a redis.Pool is created to manage connections to each of the cluster's nodes. A call to Get returns a connection from that pool. The Dial method, on the other hand, guarantees that the returned connection will not be managed by a pool, even if CreatePool is set. It calls redigo's redis.Dial function to create the unpooled connection, passing along any DialOptions set on the cluster. If the cluster's CreatePool field is nil, Get behaves the same as Dial. The Refresh method refreshes the cluster's internal mapping of hash slots to nodes. It should typically be called only once, after the cluster is created and before it is used, so that the first connections already benefit from smart routing. It is automatically kept up-to-date based on the redis MOVED responses afterwards. A cluster must be closed once it is no longer used to release its resources. The connection returned from Get or Dial is a redigo redis.Conn interface (that also implements redis.ConnWithTimeout), with a concrete type of *Conn. In addition to the interface's required methods, *Conn adds the following methods: The returned connection is not yet connected to any node; it is "bound" to a specific node only when a call to Do, Send, Receive or Bind is made. For Do, Send and Receive, the node selection is implicit, it uses the first parameter of the command, and computes the hash slot assuming that first parameter is a key. It then binds the connection to the node corresponding to that slot. If there are no parameters for the command, or if there is no command (e.g. in a call to Receive), a random node is selected. Bind is explicit, it gives control to the caller over which node to select by specifying a list of keys that the caller wishes to handle with the connection. All keys must belong to the same slot, and the connection must not already be bound to a node, otherwise an error is returned. On success, the connection is bound to the node holding the slot of the specified key(s). Because the connection is returned as a redis.Conn interface, a type assertion must be used to access the underlying *Conn and to be able to call Bind: The BindConn package-level function is provided as a helper for this common use-case. The ReadOnly method marks the connection as read-only, meaning that it will attempt to connect to a replica instead of the master node for its slot. Once bound to a node, the READONLY redis command is sent automatically, so it doesn't have to be sent explicitly before use. ReadOnly must be called before the connection is bound to a node, otherwise an error is returned. For the same reason as for Bind, a type assertion must be used to call ReadOnly on a *Conn, so a package-level helper function is also provided, ReadOnlyConn. There is no ReadWrite method, because it can be sent as a normal redis command and will essentially end that connection (all commands will now return MOVED errors). If the connection was wrapped in a RetryConn call, then it will automatically follow the redirection to the master node (see the Redirections section). The connection must be closed after use, to release the underlying resources. The redis cluster may return MOVED and ASK errors when the node that received the command doesn't currently hold the slot corresponding to the key. The package cannot reliably handle those redirections automatically because the redirection error may be returned for a pipeline of commands, some of which may have succeeded. However, a connection can be wrapped by a call to RetryConn, which returns a redis.Conn interface where only calls to Do, Close and Err can succeed. That means pipelining is not supported, and only a single command can be executed at a time, but it will automatically handle MOVED and ASK replies, as well as TRYAGAIN errors. Note that even if RetryConn is not used, the cluster always updates its mapping of slots to nodes automatically by keeping track of MOVED replies. The concurrency model is similar to that of the redigo package: Cluster methods are safe to call concurrently (like redis.Pool). Connections do not support concurrent calls to write methods (Send, Flush) or concurrent calls to the read method (Receive). Connections do allow a concurrent reader and writer. Because the Do method combines the functionality of Send, Flush and Receive, it cannot be called concurrently with other methods. The Bind and ReadOnly methods are safe to call concurrently, but there is not much point in doing so for as both will fail if the connection is already bound. Create and use a cluster.

Package lldb implements a low level database engine. The database model used could be considered a specific implementation of some small(est) intersection of models listed in [1]. As a settled term is lacking, it'll be called here a 'Virtual memory model' (VMM). 2016-07-24: v1.0.4 brings some performance improvements. 2016-07-22: v1.0.3 brings some small performance improvements. 2016-07-12: v1.0.2 now uses packages from cznic/internal. 2016-07-12: v1.0.1 adds a license for testdata/fortunes.txt. 2016-07-11: First standalone release v1.0.0 of the package previously published as experimental (github.com/cznic/exp/lldb). A Filer is an abstraction of storage. A Filer may be a part of some process' virtual address space, an OS file, a networked, remote file etc. Persistence of the storage is optional, opaque to VMM and it is specific to a concrete Filer implementation. Mechanism to allocate, reallocate (resize), deallocate (and later reclaim the unused) contiguous parts of a Filer, called blocks. Blocks are identified and referred to by a handle, an int64. In addition to the VMM like services, lldb provides volatile and non-volatile BTrees. Keys and values of a BTree are limited in size to 64kB each (a bit more actually). Support for larger keys/values, if desired, can be built atop a BTree to certain limits. A handle is the abstracted storage counterpart of a memory address. There is one fundamental difference, though. Resizing a block never results in a change to the handle which refers to the resized block, so a handle is more akin to an unique numeric id/key. Yet it shares one property of pointers - handles can be associated again with blocks after the original handle block was deallocated. In other words, a handle uniqueness domain is the state of the database and is not something comparable to e.g. an ever growing numbering sequence. Also, as with memory pointers, dangling handles can be created and blocks overwritten when such handles are used. Using a zero handle to refer to a block will not panic; however, the resulting error is effectively the same exceptional situation as dereferencing a nil pointer. Allocated/used blocks, are limited in size to only a little bit more than 64kB. Bigger semantic entities/structures must be built in lldb's client code. The content of a block has no semantics attached, it's only a fully opaque `[]byte`. Use of "scalars" applies to EncodeScalars, DecodeScalars and Collate. Those first two "to bytes" and "from bytes" functions are suggested for handling multi-valued Allocator content items and/or keys/values of BTrees (using Collate for keys). Types called "scalar" are: Included are concrete implementations of some of the VMM interfaces included to ease serving simple client code or for testing and possibly as an example. More details in the documentation of such implementations.

Package sqlite is an in-process implementation of a self-contained, serverless, zero-configuration, transactional SQL database engine. (Work In Progress) 2017-06-10 Windows/Intel no more uses the VM (thanks Steffen Butzer). 2017-06-05 Linux/Intel no more uses the VM (cznic/virtual). To access a Sqlite database do something like This is an experimental, pre-alpha, technology preview package. The alpha release is due when the C runtime support of SQLite in cznic/crt will be complete. See http://modernc.org/ccir. To add a newly supported os/arch combination to this package try running 'go generate'. See https://sqlite.org/docs.html

Package sqlite is an in-process implementation of a self-contained, serverless, zero-configuration, transactional SQL database engine. (Work In Progress) 2017-06-10 Windows/Intel no more uses the VM (thanks Steffen Butzer). 2017-06-05 Linux/Intel no more uses the VM (cznic/virtual). To access a Sqlite database do something like This is an experimental, pre-alpha, technology preview package. The alpha release is due when the C runtime support of SQLite in cznic/crt will be complete. See http://modernc.org/ccir. To add a newly supported os/arch combination to this package try running 'go generate'. See https://sqlite.org/docs.html

Package gcfg reads "INI-style" text-based configuration files with "name=value" pairs grouped into sections (gcfg files). This package is still a work in progress; see the sections below for planned changes. The syntax is based on that used by git config: http://git-scm.com/docs/git-config#_syntax . There are some (planned) differences compared to the git config format: The functions in this package read values into a user-defined struct. Each section corresponds to a struct field in the config struct, and each variable in a section corresponds to a data field in the section struct. The mapping of each section or variable name to fields is done either based on the "gcfg" struct tag or by matching the name of the section or variable, ignoring case. In the latter case, hyphens '-' in section and variable names correspond to underscores '_' in field names. Fields must be exported; to use a section or variable name starting with a letter that is neither upper- or lower-case, prefix the field name with 'X'. (See https://code.google.com/p/go/issues/detail?id=5763#c4 .) For sections with subsections, the corresponding field in config must be a map, rather than a struct, with string keys and pointer-to-struct values. Values for subsection variables are stored in the map with the subsection name used as the map key. (Note that unlike section and variable names, subsection names are case sensitive.) When using a map, and there is a section with the same section name but without a subsection name, its values are stored with the empty string used as the key. It is possible to provide default values for subsections in the section "default-<sectionname>" (or by setting values in the corresponding struct field "Default_<sectionname>"). The functions in this package panic if config is not a pointer to a struct, or when a field is not of a suitable type (either a struct or a map with string keys and pointer-to-struct values). The section structs in the config struct may contain single-valued or multi-valued variables. Variables of unnamed slice type (that is, a type starting with `[]`) are treated as multi-value; all others (including named slice types) are treated as single-valued variables. Single-valued variables are handled based on the type as follows. Unnamed pointer types (that is, types starting with `*`) are dereferenced, and if necessary, a new instance is allocated. For types implementing the encoding.TextUnmarshaler interface, the UnmarshalText method is used to set the value. Implementing this method is the recommended way for parsing user-defined types. For fields of string kind, the value string is assigned to the field, after unquoting and unescaping as needed. For fields of bool kind, the field is set to true if the value is "true", "yes", "on" or "1", and set to false if the value is "false", "no", "off" or "0", ignoring case. In addition, single-valued bool fields can be specified with a "blank" value (variable name without equals sign and value); in such case the value is set to true. Predefined integer types [u]int(|8|16|32|64) and big.Int are parsed as decimal or hexadecimal (if having '0x' prefix). (This is to prevent unintuitively handling zero-padded numbers as octal.) Other types having [u]int* as the underlying type, such as os.FileMode and uintptr allow decimal, hexadecimal, or octal values. Parsing mode for integer types can be overridden using the struct tag option ",int=mode" where mode is a combination of the 'd', 'h', and 'o' characters (each standing for decimal, hexadecimal, and octal, respectively.) All other types are parsed using fmt.Sscanf with the "%v" verb. For multi-valued variables, each individual value is parsed as above and appended to the slice. If the first value is specified as a "blank" value (variable name without equals sign and value), a new slice is allocated; that is any values previously set in the slice will be ignored. The types subpackage for provides helpers for parsing "enum-like" and integer types. There are 3 types of errors: Programmer errors trigger panics. These are should be fixed by the programmer before releasing code that uses gcfg. Data errors cause gcfg to return a non-nil error value. This includes the case when there are extra unknown key-value definitions in the configuration data (extra data). However, in some occasions it is desirable to be able to proceed in situations when the only data error is that of extra data. These errors are handled at a different (warning) priority and can be filtered out programmatically. To ignore extra data warnings, wrap the gcfg.Read*Into invocation into a call to gcfg.FatalOnly. The following is a list of changes under consideration:

Package zabbix provides bindings to interoperate between programs written in Go language and the Zabbix monitoring API. Tested on Zabbix 3.2 but should work since 2.0 version. This package aims to support multiple zabbix resources from its API like trigger, application, host group, host, item, template.. Install it: `go get github.com/DmitriySolopenkov/go-zabbix-api` Getting started Run test You should run tests before using this package – Zabbix API doesn't match documentation in few details, which are changing in patch releases. Tests are not expected to be destructive, but you are advised to run them against not-production instance or at least make a backup. `TEST_ZABBIX_URL` may contain HTTP basic auth username and password: `http://username:password@host/api_jsonrpc.php`. Also, in some setups URL should be like `http://host/zabbix/api_jsonrpc.php`.

Package osrelease is a slightly pedantic implementation of freedesktop.org's specification of the "os-release" file format. Please see https://www.freedesktop.org/software/systemd/man/os-release.html for details about the "os-release" file format and its various OS identification variables. Fetches os-release(5) variables with their values (when systemd is present), then prints them.

Package config is an encoding-agnostic configuration abstraction. It supports merging multiple configuration files, expanding environment variables, and a variety of other small niceties. It currently supports YAML, but may be extended in the future to support more restrictive encodings like JSON or TOML. It's often convenient to separate configuration into multiple files; for example, an application may want to first load some universally-applicable configuration and then merge in some environment-specific overrides. This package supports this pattern in a variety of ways, all of which use the same merge logic. Simple types (numbers, strings, dates, and anything else YAML would consider a scalar) are merged by replacing lower-priority values with higher-priority overrides. For example, consider this merge of base.yaml and override.yaml: Slices, arrays, and anything else YAML would consider a sequence are also replaced. Again merging base.yaml and override.yaml: Maps are recursively deep-merged, handling scalars and sequences as described above. Consider a merge between a more complex set of YAML files: In all cases, explicit nils (represented in YAML with a tilde) override any pre-existing configuration. For example, By default, the NewYAML constructor enables gopkg.in/yaml.v2's strict unmarshalling mode. This prevents a variety of common programmer errors, especially when deep-merging loosely-typed YAML files. In strict mode, providers throw errors if keys are duplicated in the same configuration source, all keys aren't used when populating a struct, or a merge encounters incompatible data types. This behavior can be disabled with the Permissive option. To maintain backward compatibility, all other constructors default to permissive unmarshalling. YAML allows strings to appear quoted or unquoted, so these two lines are identical: However, the YAML specification special-cases some unquoted strings. Most obviously, true and false are interpreted as Booleans (unless quoted). Less obviously, yes, no, on, off, and many variants of these words are also treated as Booleans (see http://yaml.org/type/bool.html for the complete specification). Correctly deep-merging sources requires this package to unmarshal and then remarshal all YAML, which implicitly converts these special-cased unquoted strings to their canonical representation. For example, Quoting special-cased strings prevents this surprising behavior. Unfortunately, this package was released with a variety of bugs and an overly large API. The internals of the configuration provider have been completely reworked and all known bugs have been addressed, but many duplicative exported functions were retained to preserve backward compatibility. New users should rely on the NewYAML constructor. In particular, avoid NewValue - it's unnecessary, complex, and may panic. Deprecated functions are documented in the format expected by the staticcheck linter, available at https://staticcheck.io/.

Package gofpdf implements a PDF document generator with high level support for text, drawing and images. - UTF-8 support - Choice of measurement unit, page format and margins - Page header and footer management - Automatic page breaks, line breaks, and text justification - Inclusion of JPEG, PNG, GIF, TIFF and basic path-only SVG images - Colors, gradients and alpha channel transparency - Outline bookmarks - Internal and external links - TrueType, Type1 and encoding support - Page compression - Lines, Bézier curves, arcs, and ellipses - Rotation, scaling, skewing, translation, and mirroring - Clipping - Document protection - Layers - Templates - Barcodes - Charting facility - Import PDFs as templates gofpdf has no dependencies other than the Go standard library. All tests pass on Linux, Mac and Windows platforms. gofpdf supports UTF-8 TrueType fonts and “right-to-left” languages. Note that Chinese, Japanese, and Korean characters may not be included in many general purpose fonts. For these languages, a specialized font (for example, NotoSansSC for simplified Chinese) can be used. Also, support is provided to automatically translate UTF-8 runes to code page encodings for languages that have fewer than 256 glyphs. This repository will not be maintained, at least for some unknown duration. But it is hoped that gofpdf has a bright future in the open source world. Due to Go’s promise of compatibility, gofpdf should continue to function without modification for a longer time than would be the case with many other languages. Forks should be based on the last viable commit. Tools such as active-forks can be used to select a fork that looks promising for your needs. If a particular fork looks like it has taken the lead in attracting followers, this README will be updated to point people in that direction. The efforts of all contributors to this project have been deeply appreciated. Best wishes to all of you. To install the package on your system, run Later, to receive updates, run The following Go code generates a simple PDF file. See the functions in the fpdf_test.go file (shown as examples in this documentation) for more advanced PDF examples. If an error occurs in an Fpdf method, an internal error field is set. After this occurs, Fpdf method calls typically return without performing any operations and the error state is retained. This error management scheme facilitates PDF generation since individual method calls do not need to be examined for failure; it is generally sufficient to wait until after Output() is called. For the same reason, if an error occurs in the calling application during PDF generation, it may be desirable for the application to transfer the error to the Fpdf instance by calling the SetError() method or the SetErrorf() method. At any time during the life cycle of the Fpdf instance, the error state can be determined with a call to Ok() or Err(). The error itself can be retrieved with a call to Error(). This package is a relatively straightforward translation from the original FPDF library written in PHP (despite the caveat in the introduction to Effective Go). The API names have been retained even though the Go idiom would suggest otherwise (for example, pdf.GetX() is used rather than simply pdf.X()). The similarity of the two libraries makes the original FPDF website a good source of information. It includes a forum and FAQ. However, some internal changes have been made. Page content is built up using buffers (of type bytes.Buffer) rather than repeated string concatenation. Errors are handled as explained above rather than panicking. Output is generated through an interface of type io.Writer or io.WriteCloser. A number of the original PHP methods behave differently based on the type of the arguments that are passed to them; in these cases additional methods have been exported to provide similar functionality. Font definition files are produced in JSON rather than PHP. A side effect of running go test ./... is the production of a number of example PDFs. These can be found in the gofpdf/pdf directory after the tests complete. Please note that these examples run in the context of a test. In order run an example as a standalone application, you’ll need to examine fpdf_test.go for some helper routines, for example exampleFilename() and summary(). Example PDFs can be compared with reference copies in order to verify that they have been generated as expected. This comparison will be performed if a PDF with the same name as the example PDF is placed in the gofpdf/pdf/reference directory and if the third argument to ComparePDFFiles() in internal/example/example.go is true. (By default it is false.) The routine that summarizes an example will look for this file and, if found, will call ComparePDFFiles() to check the example PDF for equality with its reference PDF. If differences exist between the two files they will be printed to standard output and the test will fail. If the reference file is missing, the comparison is considered to succeed. In order to successfully compare two PDFs, the placement of internal resources must be consistent and the internal creation timestamps must be the same. To do this, the methods SetCatalogSort() and SetCreationDate() need to be called for both files. This is done automatically for all examples. Nothing special is required to use the standard PDF fonts (courier, helvetica, times, zapfdingbats) in your documents other than calling SetFont(). You should use AddUTF8Font() or AddUTF8FontFromBytes() to add a TrueType UTF-8 encoded font. Use RTL() and LTR() methods switch between “right-to-left” and “left-to-right” mode. In order to use a different non-UTF-8 TrueType or Type1 font, you will need to generate a font definition file and, if the font will be embedded into PDFs, a compressed version of the font file. This is done by calling the MakeFont function or using the included makefont command line utility. To create the utility, cd into the makefont subdirectory and run “go build”. This will produce a standalone executable named makefont. Select the appropriate encoding file from the font subdirectory and run the command as in the following example. In your PDF generation code, call AddFont() to load the font and, as with the standard fonts, SetFont() to begin using it. Most examples, including the package example, demonstrate this method. Good sources of free, open-source fonts include Google Fonts and DejaVu Fonts. The draw2d package is a two dimensional vector graphics library that can generate output in different forms. It uses gofpdf for its document production mode. gofpdf is a global community effort and you are invited to make it even better. If you have implemented a new feature or corrected a problem, please consider contributing your change to the project. A contribution that does not directly pertain to the core functionality of gofpdf should be placed in its own directory directly beneath the contrib directory. Here are guidelines for making submissions. Your change should - be compatible with the MIT License - be properly documented - be formatted with go fmt - include an example in fpdf_test.go if appropriate - conform to the standards of golint and go vet, that is, golint . and go vet . should not generate any warnings - not diminish test coverage Pull requests are the preferred means of accepting your changes. gofpdf is released under the MIT License. It is copyrighted by Kurt Jung and the contributors acknowledged below. This package’s code and documentation are closely derived from the FPDF library created by Olivier Plathey, and a number of font and image resources are copied directly from it. Bruno Michel has provided valuable assistance with the code. Drawing support is adapted from the FPDF geometric figures script by David Hernández Sanz. Transparency support is adapted from the FPDF transparency script by Martin Hall-May. Support for gradients and clipping is adapted from FPDF scripts by Andreas Würmser. Support for outline bookmarks is adapted from Olivier Plathey by Manuel Cornes. Layer support is adapted from Olivier Plathey. Support for transformations is adapted from the FPDF transformation script by Moritz Wagner and Andreas Würmser. PDF protection is adapted from the work of Klemen Vodopivec for the FPDF product. Lawrence Kesteloot provided code to allow an image’s extent to be determined prior to placement. Support for vertical alignment within a cell was provided by Stefan Schroeder. Ivan Daniluk generalized the font and image loading code to use the Reader interface while maintaining backward compatibility. Anthony Starks provided code for the Polygon function. Robert Lillack provided the Beziergon function and corrected some naming issues with the internal curve function. Claudio Felber provided implementations for dashed line drawing and generalized font loading. Stani Michiels provided support for multi-segment path drawing with smooth line joins, line join styles, enhanced fill modes, and has helped greatly with package presentation and tests. Templating is adapted by Marcus Downing from the FPDF_Tpl library created by Jan Slabon and Setasign. Jelmer Snoeck contributed packages that generate a variety of barcodes and help with registering images on the web. Jelmer Snoek and Guillermo Pascual augmented the basic HTML functionality with aligned text. Kent Quirk implemented backwards-compatible support for reading DPI from images that support it, and for setting DPI manually and then having it properly taken into account when calculating image size. Paulo Coutinho provided support for static embedded fonts. Dan Meyers added support for embedded JavaScript. David Fish added a generic alias-replacement function to enable, among other things, table of contents functionality. Andy Bakun identified and corrected a problem in which the internal catalogs were not sorted stably. Paul Montag added encoding and decoding functionality for templates, including images that are embedded in templates; this allows templates to be stored independently of gofpdf. Paul also added support for page boxes used in printing PDF documents. Wojciech Matusiak added supported for word spacing. Artem Korotkiy added support of UTF-8 fonts. Dave Barnes added support for imported objects and templates. Brigham Thompson added support for rounded rectangles. Joe Westcott added underline functionality and optimized image storage. Benoit KUGLER contributed support for rectangles with corners of unequal radius, modification times, and for file attachments and annotations. - Remove all legacy code page font support; use UTF-8 exclusively - Improve test coverage as reported by the coverage tool. Example demonstrates the generation of a simple PDF document. Note that since only core fonts are used (in this case Arial, a synonym for Helvetica), an empty string can be specified for the font directory in the call to New(). Note also that the example.Filename() and example.Summary() functions belong to a separate, internal package and are not part of the gofpdf library. If an error occurs at some point during the construction of the document, subsequent method calls exit immediately and the error is finally retrieved with the output call where it can be handled by the application.

Package enmime implements a MIME encoding and decoding library. It's built on top of Go's included mime/multipart support where possible, but is geared towards parsing MIME encoded emails. The enmime API has two conceptual layers. The lower layer is a tree of Part structs, representing each component of a decoded MIME message. The upper layer, called an Envelope provides an intuitive way to interact with a MIME message. Calling ReadParts causes enmime to parse the body of a MIME message into a tree of Part objects, each of which is aware of its content type, filename and headers. The content of a Part is available as a slice of bytes via the Content field. If the part was encoded in quoted-printable or base64, it is decoded prior to being placed in Content. If the Part contains text in a character set other than utf-8, enmime will attempt to convert it to utf-8. To locate a particular Part, pass a custom PartMatcher function into the BreadthMatchFirst() or DepthMatchFirst() methods to search the Part tree. BreadthMatchAll() and DepthMatchAll() will collect all Parts matching your criteria. ReadEnvelope returns an Envelope struct. Behind the scenes a Part tree is constructed, and then sorted into the correct fields of the Envelope. The Envelope contains both the plain text and HTML portions of the email. If there was no plain text Part available, the HTML Part will be down-converted using the html2text library1. The root of the Part tree, as well as slices of the inline and attachment Parts are also available. Every MIME Part has its own headers, accessible via the Part.Header field. The raw headers for an Envelope are available in Root.Header. Envelope also provides helper methods to fetch headers: GetHeader(key) will return the RFC 2047 decoded value of the specified header. AddressList(key) will convert the specified address header into a slice of net/mail.Address values. enmime attempts to be tolerant of poorly encoded MIME messages. In situations where parsing is not possible, the ReadEnvelope and ReadParts functions will return a hard error. If enmime is able to continue parsing the message, it will add an entry to the Errors slice on the relevant Part. After parsing is complete, all Part errors will be appended to the Envelope Errors slice. The Error* constants can be used to identify a specific class of error. Please note that enmime parses messages into memory, so it is not likely to perform well with multi-gigabyte attachments. enmime is open source software released under the MIT License. The latest version can be found at https://github.com/zond/enmime