Merged updates from trunk into stable branch

[feedcatcher.git] / vendor / rails / actionpack / lib / action_controller / vendor / rack-1.0 / rack / urlmap.rb

diff --git a/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb b/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb
new file mode 100644 (file)
index 0000000..0ff32df
--- /dev/null
+++ b/vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb
@@ -0,0 +1,55 @@
+module Rack
+  # Rack::URLMap takes a hash mapping urls or paths to apps, and
+  # dispatches accordingly.  Support for HTTP/1.1 host names exists if
+  # the URLs start with <tt>http://</tt> or <tt>https://</tt>.
+  #
+  # URLMap modifies the SCRIPT_NAME and PATH_INFO such that the part
+  # relevant for dispatch is in the SCRIPT_NAME, and the rest in the
+  # PATH_INFO.  This should be taken care of when you need to
+  # reconstruct the URL in order to create links.
+  #
+  # URLMap dispatches in such a way that the longest paths are tried
+  # first, since they are most specific.
+
+  class URLMap
+    def initialize(map = {})
+      remap(map)
+    end
+
+    def remap(map)
+      @mapping = map.map { |location, app|
+        if location =~ %r{\Ahttps?://(.*?)(/.*)}
+          host, location = $1, $2
+        else
+          host = nil
+        end
+
+        unless location[0] == ?/
+          raise ArgumentError, "paths need to start with /"
+        end
+        location = location.chomp('/')
+
+        [host, location, app]
+      }.sort_by { |(h, l, a)| [-l.size, h.to_s.size] }  # Longest path first
+    end
+
+    def call(env)
+      path = env["PATH_INFO"].to_s.squeeze("/")
+      script_name = env['SCRIPT_NAME']
+      hHost, sName, sPort = env.values_at('HTTP_HOST','SERVER_NAME','SERVER_PORT')
+      @mapping.each { |host, location, app|
+        next unless (hHost == host || sName == host \
+          || (host.nil? && (hHost == sName || hHost == sName+':'+sPort)))
+        next unless location == path[0, location.size]
+        next unless path[location.size] == nil || path[location.size] == ?/
+
+        return app.call(
+          env.merge(
+            'SCRIPT_NAME' => (script_name + location),
+            'PATH_INFO'   => path[location.size..-1]))
+      }
+      [404, {"Content-Type" => "text/plain"}, ["Not Found: #{path}"]]
+    end
+  end
+end
+