Link Checker

Crawls a page/site and reports broken links or images.

Installation

npm install -g recursive-link-checker

or, just pull the Docker image:

docker pull ktbartholomew/link-checker

Don't forget: the name of the install package and the name of the binary are different. You're installing recursive-link-checker but will actually use the application as just link-checker.

Usage

The global npm binary way:

$ link-checker [options] <url>

The Docker way:

$ docker run --rm ktbartholomew/link-checker [options] <url>

Either way, when you run it, it looks something like this:

$ bin/link-checker http://localhost:8080/
[ BROKEN ] URL:      http://localhost:8080/broken-link/
           Error:    Error: Not Found
           Referrer: http://localhost:8080/about/
           Element:  <a href="/broken-link/">Broken Link</a>
Crawl complete! 1/22 links were broken (4.5% broken)

Options

-h, --help               output usage information
-c, --concurrency <num>  How many links to check concurrently. Default: 5
-t, --threshold <num>    Exit with error if this many broken links are found. Percentage of broken/total if < 1, count of total broken links if >= 1
-A, --no-assets          Don’t check linked assets like JavaScript and CSS
-I, --no-images          Don’t check images
-L, --no-links           Don’t check hyperlinks
-v, --verbose            Be more verbose

Exit codes

An exit code of 0 is a success and an exit code of 1 is a failure. The exit code can be manipulated by providing a value to --threshold.

To fail if 5% or more of all crawled links are broken (this is the default failure threshold):

$ link-checker --threshold 0.05 <url>

To fail if 5 or more links are broken:

$ link-checker --threshold 5 <url>