GET routes accepts HEAD requests

lib/journey/router.rb

@@ -128,6 +128,7 @@ def find_routes env
       routes = filter_routes(req.path_info) + custom_routes.find_all { |r|
         r.path.match(req.path_info)
       }
+      routes.concat head_routes(routes)
 
       routes.sort_by(&:precedence).find_all { |r|
         r.constraints.all? { |k,v| v === req.send(k) } &&
@@ -141,5 +142,22 @@ def find_routes env
         [match_data, r.defaults.merge(info), r]
       }
     end
+
+    def head_routes(routes)
+      precedence = (routes.map(&:precedence).max || 0) + 1
+      routes = routes.select { |r|
+        r.verb === "GET" && !(r.verb === "HEAD")
+      }.map! { |r|
+        Route.new(r.name,
+                  r.app,
+                  r.path,
+                  r.conditions.merge(:request_method => "HEAD"),
+                  r.defaults).tap do |route|
+                    route.precedence = r.precedence + precedence
+                  end
+      }
+      routes.flatten!
+      routes
+    end
   end
 end

test/test_router.rb

@@ -478,6 +478,25 @@ def test_recognize_literal
       assert called
     end
 
+    def test_recognize_head_request_as_get_route
+      path   = Path::Pattern.new "/books(/:action(.:format))"
+      app    = Object.new
+      conditions = {
+        :request_method => 'GET'
+      }
+      @router.routes.add_route(app, path, conditions, {})
+
+      env = rails_env 'PATH_INFO' => '/books/list.rss',
+                      "REQUEST_METHOD"    => "HEAD"
+
+      called = false
+      @router.recognize(env) do |r, _, params|
+        called = true
+      end
+
+      assert called
+    end
+
     def test_recognize_cares_about_verbs
       path   = Path::Pattern.new "/books(/:action(.:format))"
       app    = Object.new