github.com/go-resty/resty
Simple HTTP and REST client library for Go (inspired by Ruby rest-client)
Features section describes in detail about Resty capabilities
v2 development is in-progress :smile:string, []byte, struct, map, slice and io.Reader too
Content-Typeio.Reader[]byte array - response.Body() OR Access as string - response.String()response.Time() and when we response.ReceivedAt()JSON and XML content type
JSON, if you supply struct/map without header Content-Typeapplication/problem+json & application/problem+xmlmultipart/form-data
Request.SetContext supported go1.7 and aboveBasicAuth and Bearer tokenContentLength value for all request or particular requestREST
HTTP - default up to 10 redirects and no automatic response unmarshalREST - defaults to no redirects and automatic response marshal/unmarshal for JSON & XMLcurl -o flag. See SetOutputDirectory & SetOutput.Timeout, RedirectPolicy, Proxy, TLSClientConfig, Transport, etc.Content-Type when response Content-Type header missing. Refer to #92resty.New()http.RoundTripper implementation, see SetTransportHTTP/2 and HTTP/1.1Resty works with go1.3 and above.
Please refer section Versioning for detailed info.
require gopkg.in/resty.v1 v1.12.0
go get -u gopkg.in/resty.v1
Resty v2 release will be moving away from gopkg.in proxy versioning. It will completely follow and adpating Go Mod versioning recommendation. For e.g.: module definition would be module github.com/go-resty/resty/v2.
Resty author also published following projects for Go Community.
struct.The following samples will assist you to become as comfortable as possible with resty library. Resty comes with ready to use DefaultClient.
Import resty into your code and refer it as resty.
import "gopkg.in/resty.v1"
// GET request
resp, err := resty.R().Get("http://httpbin.org/get")
// explore response object
fmt.Printf("\nError: %v", err)
fmt.Printf("\nResponse Status Code: %v", resp.StatusCode())
fmt.Printf("\nResponse Status: %v", resp.Status())
fmt.Printf("\nResponse Time: %v", resp.Time())
fmt.Printf("\nResponse Received At: %v", resp.ReceivedAt())
fmt.Printf("\nResponse Body: %v", resp) // or resp.String() or string(resp.Body())
// more...
/* Output
Error: <nil>
Response Status Code: 200
Response Status: 200 OK
Response Time: 160.1151ms
Response Received At: 2018-10-16 16:28:34.8595663 -0700 PDT m=+0.166119401
Response Body: {
"args": {},
"headers": {
"Accept-Encoding": "gzip",
"Connection": "close",
"Host": "httpbin.org",
"User-Agent": "go-resty/1.10.0 (https://github.com/go-resty/resty)"
},
"origin": "0.0.0.0",
"url": "http://httpbin.org/get"
}
*/
resp, err := resty.R().
SetQueryParams(map[string]string{
"page_no": "1",
"limit": "20",
"sort":"name",
"order": "asc",
"random":strconv.FormatInt(time.Now().Unix(), 10),
}).
SetHeader("Accept", "application/json").
SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F").
Get("/search_result")
// Sample of using Request.SetQueryString method
resp, err := resty.R().
SetQueryString("productId=232&template=fresh-sample&cat=resty&source=google&kw=buy a lot more").
SetHeader("Accept", "application/json").
SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F").
Get("/show_product")
// POST JSON string
// No need to set content type, if you have client level setting
resp, err := resty.R().
SetHeader("Content-Type", "application/json").
SetBody(`{"username":"testuser", "password":"testpass"}`).
SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
Post("https://myapp.com/login")
// POST []byte array
// No need to set content type, if you have client level setting
resp, err := resty.R().
SetHeader("Content-Type", "application/json").
SetBody([]byte(`{"username":"testuser", "password":"testpass"}`)).
SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
Post("https://myapp.com/login")
// POST Struct, default is JSON content type. No need to set one
resp, err := resty.R().
SetBody(User{Username: "testuser", Password: "testpass"}).
SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
SetError(&AuthError{}). // or SetError(AuthError{}).
Post("https://myapp.com/login")
// POST Map, default is JSON content type. No need to set one
resp, err := resty.R().
SetBody(map[string]interface{}{"username": "testuser", "password": "testpass"}).
SetResult(&AuthSuccess{}). // or SetResult(AuthSuccess{}).
SetError(&AuthError{}). // or SetError(AuthError{}).
Post("https://myapp.com/login")
// POST of raw bytes for file upload. For example: upload file to Dropbox
fileBytes, _ := ioutil.ReadFile("/Users/jeeva/mydocument.pdf")
// See we are not setting content-type header, since go-resty automatically detects Content-Type for you
resp, err := resty.R().
SetBody(fileBytes).
SetContentLength(true). // Dropbox expects this value
SetAuthToken("<your-auth-token>").
SetError(&DropboxError{}). // or SetError(DropboxError{}).
Post("https://content.dropboxapi.com/1/files_put/auto/resty/mydocument.pdf") // for upload Dropbox supports PUT too
// Note: resty detects Content-Type for request body/payload if content type header is not set.
// * For struct and map data type defaults to 'application/json'
// * Fallback is plain text content type
You can use various combinations of PUT method call like demonstrated for POST.
// Note: This is one sample of PUT method usage, refer POST for more combination
// Request goes as JSON content type
// No need to set auth token, error, if you have client level settings
resp, err := resty.R().
SetBody(Article{
Title: "go-resty",
Content: "This is my article content, oh ya!",
Author: "Jeevanandam M",
Tags: []string{"article", "sample", "resty"},
}).
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
SetError(&Error{}). // or SetError(Error{}).
Put("https://myapp.com/article/1234")
You can use various combinations of PATCH method call like demonstrated for POST.
// Note: This is one sample of PUT method usage, refer POST for more combination
// Request goes as JSON content type
// No need to set auth token, error, if you have client level settings
resp, err := resty.R().
SetBody(Article{
Tags: []string{"new tag1", "new tag2"},
}).
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
SetError(&Error{}). // or SetError(Error{}).
Patch("https://myapp.com/articles/1234")
// DELETE a article
// No need to set auth token, error, if you have client level settings
resp, err := resty.R().
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
SetError(&Error{}). // or SetError(Error{}).
Delete("https://myapp.com/articles/1234")
// DELETE a articles with payload/body as a JSON string
// No need to set auth token, error, if you have client level settings
resp, err := resty.R().
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
SetError(&Error{}). // or SetError(Error{}).
SetHeader("Content-Type", "application/json").
SetBody(`{article_ids: [1002, 1006, 1007, 87683, 45432] }`).
Delete("https://myapp.com/articles")
// HEAD of resource
// No need to set auth token, if you have client level settings
resp, err := resty.R().
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
Head("https://myapp.com/videos/hi-res-video")
// OPTIONS of resource
// No need to set auth token, if you have client level settings
resp, err := resty.R().
SetAuthToken("C6A79608-782F-4ED0-A11D-BD82FAD829CD").
Options("https://myapp.com/servers/nyc-dc-01")
profileImgBytes, _ := ioutil.ReadFile("/Users/jeeva/test-img.png")
notesBytes, _ := ioutil.ReadFile("/Users/jeeva/text-file.txt")
resp, err := resty.R().
SetFileReader("profile_img", "test-img.png", bytes.NewReader(profileImgBytes)).
SetFileReader("notes", "text-file.txt", bytes.NewReader(notesBytes)).
SetFormData(map[string]string{
"first_name": "Jeevanandam",
"last_name": "M",
}).
Post("http://myapp.com/upload")
// Single file scenario
resp, err := resty.R().
SetFile("profile_img", "/Users/jeeva/test-img.png").
Post("http://myapp.com/upload")
// Multiple files scenario
resp, err := resty.R().
SetFiles(map[string]string{
"profile_img": "/Users/jeeva/test-img.png",
"notes": "/Users/jeeva/text-file.txt",
}).
Post("http://myapp.com/upload")
// Multipart of form fields and files
resp, err := resty.R().
SetFiles(map[string]string{
"profile_img": "/Users/jeeva/test-img.png",
"notes": "/Users/jeeva/text-file.txt",
}).
SetFormData(map[string]string{
"first_name": "Jeevanandam",
"last_name": "M",
"zip_code": "00001",
"city": "my city",
"access_token": "C6A79608-782F-4ED0-A11D-BD82FAD829CD",
}).
Post("http://myapp.com/profile")
// just mentioning about POST as an example with simple flow
// User Login
resp, err := resty.R().
SetFormData(map[string]string{
"username": "jeeva",
"password": "mypass",
}).
Post("http://myapp.com/login")
// Followed by profile update
resp, err := resty.R().
SetFormData(map[string]string{
"first_name": "Jeevanandam",
"last_name": "M",
"zip_code": "00001",
"city": "new city update",
}).
Post("http://myapp.com/profile")
// Multi value form data
criteria := url.Values{
"search_criteria": []string{"book", "glass", "pencil"},
}
resp, err := resty.R().
SetMultiValueFormData(criteria).
Post("http://myapp.com/search")
// Setting output directory path, If directory not exists then resty creates one!
// This is optional one, if you're planning using absoule path in
// `Request.SetOutput` and can used together.
resty.SetOutputDirectory("/Users/jeeva/Downloads")
// HTTP response gets saved into file, similar to curl -o flag
_, err := resty.R().
SetOutput("plugin/ReplyWithHeader-v5.1-beta.zip").
Get("http://bit.ly/1LouEKr")
// OR using absolute path
// Note: output directory path is not used for absoulte path
_, err := resty.R().
SetOutput("/MyDownloads/plugin/ReplyWithHeader-v5.1-beta.zip").
Get("http://bit.ly/1LouEKr")
Resty provides easy to use dynamic request URL path params. Params can be set at client and request level. Client level params value can be overridden at request level.
resty.R().SetPathParams(map[string]string{
"userId": "sample@sample.com",
"subAccountId": "100002",
}).
Get("/v1/users/{userId}/{subAccountId}/details")
// Result:
// Composed URL - /v1/users/sample@sample.com/100002/details
Resty provides middleware ability to manipulate for Request and Response. It is more flexible than callback approach.
// Registering Request Middleware
resty.OnBeforeRequest(func(c *resty.Client, req *resty.Request) error {
// Now you have access to Client and current Request object
// manipulate it as per your need
return nil // if its success otherwise return error
})
// Registering Response Middleware
resty.OnAfterResponse(func(c *resty.Client, resp *resty.Response) error {
// Now you have access to Client and current Response object
// manipulate it as per your need
return nil // if its success otherwise return error
})
Resty provides few ready to use redirect policy(s) also it supports multiple policies together.
// Assign Client Redirect Policy. Create one as per you need
resty.SetRedirectPolicy(resty.FlexibleRedirectPolicy(15))
// Wanna multiple policies such as redirect count, domain name check, etc
resty.SetRedirectPolicy(resty.FlexibleRedirectPolicy(20),
resty.DomainCheckRedirectPolicy("host1.com", "host2.org", "host3.net"))
Implement RedirectPolicy interface and register it with resty client. Have a look redirect.go for more information.
// Using raw func into resty.SetRedirectPolicy
resty.SetRedirectPolicy(resty.RedirectPolicyFunc(func(req *http.Request, via []*http.Request) error {
// Implement your logic here
// return nil for continue redirect otherwise return error to stop/prevent redirect
return nil
}))
//---------------------------------------------------
// Using struct create more flexible redirect policy
type CustomRedirectPolicy struct {
// variables goes here
}
func (c *CustomRedirectPolicy) Apply(req *http.Request, via []*http.Request) error {
// Implement your logic here
// return nil for continue redirect otherwise return error to stop/prevent redirect
return nil
}
// Registering in resty
resty.SetRedirectPolicy(CustomRedirectPolicy{/* initialize variables */})
// Custom Root certificates, just supply .pem file.
// you can add one or more root certificates, its get appended
resty.SetRootCertificate("/path/to/root/pemFile1.pem")
resty.SetRootCertificate("/path/to/root/pemFile2.pem")
// ... and so on!
// Adding Client Certificates, you add one or more certificates
// Sample for creating certificate object
// Parsing public/private key pair from a pair of files. The files must contain PEM encoded data.
cert1, err := tls.LoadX509KeyPair("certs/client.pem", "certs/client.key")
if err != nil {
log.Fatalf("ERROR client certificate: %s", err)
}
// ...
// You add one or more certificates
resty.SetCertificates(cert1, cert2, cert3)
Default Go supports Proxy via environment variable HTTP_PROXY. Resty provides support via SetProxy & RemoveProxy.
Choose as per your need.
Client Level Proxy settings applied to all the request
// Setting a Proxy URL and Port
resty.SetProxy("http://proxyserver:8888")
// Want to remove proxy setting
resty.RemoveProxy()
Resty uses backoff to increase retry intervals after each attempt.
Usage example:
// Retries are configured per client
resty.
// Set retry count to non zero to enable retries
SetRetryCount(3).
// You can override initial retry wait time.
// Default is 100 milliseconds.
SetRetryWaitTime(5 * time.Second).
// MaxWaitTime can be overridden as well.
// Default is 2 seconds.
SetRetryMaxWaitTime(20 * time.Second)
Above setup will result in resty retrying requests returned non nil error up to 3 times with delay increased after each attempt.
You can optionally provide client with custom retry conditions:
resty.AddRetryCondition(
// Condition function will be provided with *resty.Response as a
// parameter. It is expected to return (bool, error) pair. Resty will retry
// in case condition returns true or non nil error.
func(r *resty.Response) (bool, error) {
return r.StatusCode() == http.StatusTooManyRequests, nil
},
)
Above example will make resty retry requests ended with 429 Too Many Requests
status code.
Multiple retry conditions can be added.
It is also possible to use resty.Backoff(...) to get arbitrary retry scenarios
implemented. Reference.
// REST mode. This is Default.
resty.SetRESTMode()
// HTTP mode
resty.SetHTTPMode()
// Allow GET request with Payload. This is disabled by default.
resty.SetAllowGetMethodPayload(true)
// Here you go!
// Client 1
client1 := resty.New()
client1.R().Get("http://httpbin.org")
// ...
// Client 2
client2 := resty.New()
client2.R().Head("http://httpbin.org")
// ...
// Bend it as per your need!!!
// Unique settings at Client level
//--------------------------------
// Enable debug mode
resty.SetDebug(true)
// Using you custom log writer
logFile, _ := os.OpenFile("/Users/jeeva/go-resty.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
resty.SetLogger(logFile)
// Assign Client TLSClientConfig
// One can set custom root-certificate. Refer: http://golang.org/pkg/crypto/tls/#example_Dial
resty.SetTLSClientConfig(&tls.Config{ RootCAs: roots })
// or One can disable security check (https)
resty.SetTLSClientConfig(&tls.Config{ InsecureSkipVerify: true })
// Set client timeout as per your need
resty.SetTimeout(1 * time.Minute)
// You can override all below settings and options at request level if you want to
//--------------------------------------------------------------------------------
// Host URL for all request. So you can use relative URL in the request
resty.SetHostURL("http://httpbin.org")
// Headers for all request
resty.SetHeader("Accept", "application/json")
resty.SetHeaders(map[string]string{
"Content-Type": "application/json",
"User-Agent": "My custom User Agent String",
})
// Cookies for all request
resty.SetCookie(&http.Cookie{
Name:"go-resty",
Value:"This is cookie value",
Path: "/",
Domain: "sample.com",
MaxAge: 36000,
HttpOnly: true,
Secure: false,
})
resty.SetCookies(cookies)
// URL query parameters for all request
resty.SetQueryParam("user_id", "00001")
resty.SetQueryParams(map[string]string{ // sample of those who use this manner
"api_key": "api-key-here",
"api_secert": "api-secert",
})
resty.R().SetQueryString("productId=232&template=fresh-sample&cat=resty&source=google&kw=buy a lot more")
// Form data for all request. Typically used with POST and PUT
resty.SetFormData(map[string]string{
"access_token": "BC594900-518B-4F7E-AC75-BD37F019E08F",
})
// Basic Auth for all request
resty.SetBasicAuth("myuser", "mypass")
// Bearer Auth Token for all request
resty.SetAuthToken("BC594900518B4F7EAC75BD37F019E08FBC594900518B4F7EAC75BD37F019E08F")
// Enabling Content length value for all request
resty.SetContentLength(true)
// Registering global Error object structure for JSON/XML request
resty.SetError(&Error{}) // or resty.SetError(Error{})
unixSocket := "/var/run/my_socket.sock"
// Create a Go's http.Transport so we can set it in resty.
transport := http.Transport{
Dial: func(_, _ string) (net.Conn, error) {
return net.Dial("unix", unixSocket)
},
}
// Set the previous transport that we created, set the scheme of the communication to the
// socket and set the unixSocket as the HostURL.
r := resty.New().SetTransport(&transport).SetScheme("http").SetHostURL(unixSocket)
// No need to write the host's URL on the request, just the path.
r.R().Get("/index.html")
Resty can be built, tested and depended upon via Bazel. For example, to run all tests:
bazel test :go_default_test
In order to mock the http requests when testing your application you
could use the httpmock library.
When using the default resty client, you should pass the client to the library as follow:
httpmock.ActivateNonDefault(resty.DefaultClient.GetClient())
More detailed example of mocking resty http requests using ginko could be found here.
resty releases versions according to Semantic Versioning
gopkg.in/resty.vX points to appropriate tagged versions; X denotes version series number and it's a stable release for production use. For e.g. gopkg.in/resty.v0.I would welcome your contribution! If you find any improvement or issue you want to fix, feel free to send a pull request, I like pull requests that include test cases for fix/enhancement. I have done my best to bring pretty good code coverage. Feel free to write tests.
BTW, I'd like to know what you think about Resty. Kindly open an issue or send me an email; it'd mean a lot to me.
Jeevanandam M. (jeeva@myjeeva.com)
Have a look on Contributors page.
Resty released under MIT license, refer LICENSE file.
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