1 files changed, 36 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/prefix.rb b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/prefix.rb
new file mode 100644
index 0000000000..58892e4c4f
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/prefix.rb
@@ -0,0 +1,36 @@
+require 'rack/mount/utils'
+
+module Rack::Mount
+  class Prefix #:nodoc:
+    EMPTY_STRING = ''.freeze
+    PATH_INFO    = 'PATH_INFO'.freeze
+    SCRIPT_NAME  = 'SCRIPT_NAME'.freeze
+    SLASH        = '/'.freeze
+
+    KEY = 'rack.mount.prefix'.freeze
+
+    def initialize(app, prefix = nil)
+      @app, @prefix = app, prefix.freeze
+      freeze
+    end
+
+    def call(env)
+      if prefix = env[KEY] || @prefix
+        old_path_info = env[PATH_INFO].dup
+        old_script_name = env[SCRIPT_NAME].dup
+
+        begin
+          env[PATH_INFO] = Utils.normalize_path(env[PATH_INFO].sub(prefix, EMPTY_STRING))
+          env[PATH_INFO] = EMPTY_STRING if env[PATH_INFO] == SLASH
+          env[SCRIPT_NAME] = Utils.normalize_path(env[SCRIPT_NAME].to_s + prefix)
+          @app.call(env)
+        ensure
+          env[PATH_INFO] = old_path_info
+          env[SCRIPT_NAME] = old_script_name
+        end
+      else
+        @app.call(env)
+      end
+    end
+  end
+end