rails-crawler takes two arguments: the path to the Rails application and the site-relative start URL:

ruby crawl.rb /path/to/app /

If your start URL is a static page, you need to specify it explicitly:

ruby crawl.rb /path/to/app /index.html

rails-crawler uses the same interface as Rails integration tests to query URLs and retrieve their responses. Thus, it does not actually use the network at all.

Beginning with a GET request to the start URL, the site is walked in a depth-first fashion, following anchors and form actions, until all reachable paths have been processed. Each path is matched to its corresponding route (except static resources or non-existent pages which are handled separately); routes which are never hit are marked as "unused".

Currently, the application is loaded in the production environment, but this will probably change in the future.

rails-crawler currently only crawls through anonymously-accessible paths. If they require the user to log in, they will be marked as unused. Forms are submitted with no post variables, and so most will usually fail with HTTP error 422.

• The ability to authenticate with sites
• A way to submit valid form data
• Look in the config/ directory for a configuration file

rails-crawler is released under the GPL.