HTTP Router

What is it?

This is an HTTP router for use in either a web framework, or on it's own using Rack. It takes a set of routes and attempts to find the best match for it. Take a look at the examples directory for how you'd use it in the Rack context.


  • Ordered route resolution.
  • Supports variables, and globbing, both named and unnamed.
  • Regex support for variables.
  • Request condition support.
  • Partial matches.
  • Supports interstitial variables (e.g. /my-:variable-brings.all.the.boys/yard) and unnamed variable /one/:/two
  • Very fast and small code base (~1,000 loc).
  • Sinatra via


Please see the examples directory for a bunch of awesome rackup file examples, with tonnes of commentary. As well, the rdocs should provide a lot of useful specifics and exact usage.

Takes the following options:

  • :default_app - The default #call made on non-matches. Defaults to a 404 generator.
  • :ignore_trailing_slash - Ignores the trailing slash when matching. Defaults to true.
  • :middleware - Perform matching without deferring to matched route. Defaults to false.

#add(name, options)

Maps a route. The format for variables in paths is: :variable *glob

Everything else is treated literally. Optional parts are surrounded by brackets. Partially matching paths have a trailing *. Optional trailing slash matching is done with /?.

As well, you can escape the following characters with a backslash: ( ) : *

Once you have a route object, use HttpRouter::Route#to to add a destination and HttpRouter::Route#name to name it.


  r =
  r.add('/test/:variable(.:format)').name(:my_test_path).to {|env| [200, {}, "Hey dude #{env['router.params'][:variable]}"]}

As well, you can support regex matching and request conditions. To add a regex match, use matching(:id => /\d+/). To match on a request condition you can use condition(:request_method => %w(POST HEAD)) or more succinctly request_method('POST', 'HEAD').

There are convenience methods HttpRouter#get, HttpRouter#post, etc for each request method.

Routes will not be recognized unless #to has been called on it.

#url(name or route, *args)

Generates a route. The args can either be a hash, a list, or a mix of both.


Recognizes and dispatches the request. env should be a Hash representing the rack environment.


Only performs recognition. env should be a Hash representing the rack environment.