grunt-check-pages
Grunt task that checks various aspects of a web page for correctness.
Getting Started
This plugin requires Grunt ~0.4.4
or later.
If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:
npm install grunt-check-pages --save-dev
Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:
grunt.loadNpmTasks('grunt-check-pages');
For similar functionality without a Grunt dependency, please see the check-pages
package.
For direct use, the check-pages-cli
package wraps check-pages
with a command-line interface.
The "checkPages" task
Overview
An important aspect of creating a web site is validating the structure, content, and configuration of the site's pages. The checkPages
task provides an easy way to integrate this testing into your normal Grunt workflow.
By providing a list of pages to scan, the task can:
Usage
In your project's Gruntfile, add a section named checkPages
to the data object passed into grunt.initConfig()
.
The following example includes all supported options:
grunt.initConfig({
checkPages: {
development: {
options: {
pageUrls: [
'http://localhost:8080/',
'http://localhost:8080/blog',
'http://localhost:8080/about.html'
],
checkLinks: true,
linksToIgnore: [
'http://localhost:8080/broken.html'
],
noEmptyFragments: true,
noLocalLinks: true,
noRedirects: true,
onlySameDomain: true,
preferSecure: true,
queryHashes: true,
checkCaching: true,
checkCompression: true,
checkXhtml: true,
summary: true,
terse: true,
maxResponseTime: 200,
userAgent: 'custom-user-agent/1.2.3'
}
},
production: {
options: {
pageUrls: [
'http://example.com/',
'http://example.com/blog',
'http://example.com/about.html'
],
checkLinks: true,
maxResponseTime: 500
}
}
}
});
Options
pageUrls
Type: Array
of String
Default value: undefined
Required
pageUrls
specifies a list of URLs for web pages the task will check. The list can be empty, but must be present. Wildcards are not supported.
URLs can point to local or remote content via the http
, https
, and file
protocols. http
and https
URLs must be absolute; file
URLs can be relative. Some features (for example, HTTP header checks) are not available with the file
protocol.
To store the list outside Gruntfile.js
, read the array from a JSON file instead: pageUrls: grunt.file.readJSON('pageUrls.json')
.
checkLinks
Type: Boolean
Default value: false
Enabling checkLinks
causes each link in a page to be checked for validity (i.e., an HTTP HEAD or GET request returns success).
For efficiency, a HEAD
request is made first and a successful result validates the link. Because some web servers misbehave, a failed HEAD
request is followed by a GET
request to definitively validate the link.
The following element/attribute pairs are used to identify links:
a
/href
area
/href
audio
/src
embed
/src
iframe
/src
img
/src
img
/srcset
input
/src
link
/href
object
/data
script
/src
source
/src
source
/srcset
track
/src
video
/src
video
/poster
linksToIgnore
Type: Array
of String
Default value: undefined
Used by: checkLinks
linksToIgnore
specifies a list of URLs that should be ignored by the link checker.
This is useful for links that are not accessible during development or known to be unreliable.
noEmptyFragments
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to fail the task if any links contain an empty fragment identifier (hash) such as <a href="#">
.
This is useful to identify placeholder links that haven't been updated.
noLocalLinks
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to fail the task if any links to localhost
are encountered.
This is useful to detect temporary links that may work during development but would fail when deployed.
The list of host names recognized as localhost
are:
- localhost
- 127.0.0.1 (and the rest of the
127.0.0.0/8
address block) - ::1 (and its expanded forms)
noRedirects
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to fail the task if any HTTP redirects are encountered.
This is useful to ensure outgoing links are to the content's canonical location.
onlySameDomain
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to block the checking of links on different domains than the referring page.
This is useful during development when external sites aren't changing and don't need to be checked.
preferSecure
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to fail the task if any HTTP links are present where the corresponding HTTPS link is also valid.
This is useful to ensure outgoing links use a secure protocol wherever possible.
queryHashes
Type: Boolean
Default value: false
Used by: checkLinks
Set this option to true
to verify links with file hashes in the query string point to content that hashes to the expected value.
Query hashes can be used to invalidate cached responses when leveraging browser caching via long cache lifetimes.
Supported hash functions are:
- image.png?crc32=e4f013b5
- styles.css?md5=4f47458e34bc855a46349c1335f58cc3
- archive.zip?sha1=9511fa1a787d021bdf3aa9538029a44209fb5c4c
checkCaching
Type: Boolean
Default value: false
Enabling checkCaching
verifies the HTTP Cache-Control
and ETag
response headers are present and valid.
This is useful to ensure a page makes use of browser caching for better performance.
checkCompression
Type: Boolean
Default value: false
Enabling checkCompression
verifies the HTTP Content-Encoding
response header is present and valid.
This is useful to ensure a page makes use of compression for better performance.
checkXhtml
Type: Boolean
Default value: false
Enabling checkXhtml
attempts to parse each URL's content as XHTML and fails if there are any structural errors.
This is useful to ensure a page's structure is well-formed and unambiguous for browsers.
summary
Type: Boolean
Default value: false
Enabling the summary
option logs a summary of each issue found after all checks have completed.
This makes it easy to pick out failures when running tests against many pages. May be combined with the terse
option.
terse
Type: Boolean
Default value: false
Enabling the terse
option suppresses the logging of each check as it runs, instead displaying a brief overview at the end.
This is useful for scripting or to reduce output. May be combined with the summary
option.
maxResponseTime
Type: Number
Default value: undefined
maxResponseTime
specifies the maximum amount of time (in milliseconds) a page request can take to finish downloading.
Requests that take more time will trigger a failure (but are still checked for other issues).
userAgent
Type: String
Default value: grunt-check-pages/x.y.z
userAgent
specifies the value of the HTTP User-Agent
header sent with all page/link requests.
This is useful for pages that alter their behavior based on the user agent. Setting the value null
omits the User-Agent
header entirely.
Release History
- 0.1.0 - Initial release, support for
checkLinks
and checkXhtml
. - 0.1.1 - Tweak README for better formatting.
- 0.1.2 - Support page-only mode (no link or XHTML checks), show response time for requests.
- 0.1.3 - Support
maxResponseTime
option, buffer all page responses, add "no-cache" header to requests. - 0.1.4 - Support
checkCaching
and checkCompression
options, improve error handling, use gruntMock
. - 0.1.5 - Support
userAgent
option, weak entity tags, update nock
dependency. - 0.2.0 - Support
noLocalLinks
option, rename disallowRedirect
option to noRedirects
, switch to ESLint
, update superagent
and nock
dependencies. - 0.3.0 - Support
queryHashes
option for CRC-32/MD5/SHA-1, update superagent
dependency. - 0.4.0 - Rename
onlySameDomainLinks
option to onlySameDomain
, fix handling of redirected page links, use page order for links, update all dependencies. - 0.5.0 - Show location of redirected links with
noRedirects
option, switch to crc-hash
dependency. - 0.6.0 - Support
summary
option, update crc-hash
, grunt-eslint
, nock
dependencies. - 0.6.1 - Add badges for automated build and coverage info to README (along with npm, GitHub, and license).
- 0.6.2 - Switch from
superagent
to request
, update grunt-eslint
and nock
dependencies. - 0.7.0 - Move task implementation into reusable
check-pages
package. - 0.7.1 - Fix misreporting of "Bad link" for redirected links when noRedirects enabled.
- 0.8.0 - Suppress redundant link checks, support
noEmptyFragments
option, update dependencies. - 0.9.0 - Add support for checking local content via the 'file:' protocol, update dependencies.
- 0.10.0 - International URLs,
preferSecure
option, terse
option, srcset
, update dependencies.