require 'active_support/core_ext/object/to_param' require 'active_support/core_ext/regexp' module ActionDispatch # == Routing # # The routing module provides URL rewriting in native Ruby. It's a way to # redirect incoming requests to controllers and actions. This replaces # mod_rewrite rules. Best of all, Rails' Routing works with any web server. # Routes are defined in config/routes.rb. # # Consider the following route, installed by Rails when you generate your # application: # # map.connect ':controller/:action/:id' # # This route states that it expects requests to consist of a # :controller followed by an :action that in turn is fed # some :id. # # Suppose you get an incoming request for /blog/edit/22, you'll end up # with: # # params = { :controller => 'blog', # :action => 'edit', # :id => '22' # } # # Think of creating routes as drawing a map for your requests. The map tells # them where to go based on some predefined pattern: # # ActionController::Routing::Routes.draw do |map| # Pattern 1 tells some request to go to one place # Pattern 2 tell them to go to another # ... # end # # The following symbols are special: # # :controller maps to your controller name # :action maps to an action with your controllers # # Other names simply map to a parameter as in the case of :id. # # == Route priority # # Not all routes are created equally. Routes have priority defined by the # order of appearance of the routes in the config/routes.rb file. The priority goes # from top to bottom. The last route in that file is at the lowest priority # and will be applied last. If no route matches, 404 is returned. # # Within blocks, the empty pattern is at the highest priority. # In practice this works out nicely: # # ActionController::Routing::Routes.draw do |map| # map.with_options :controller => 'blog' do |blog| # blog.show '', :action => 'list' # end # map.connect ':controller/:action/:view' # end # # In this case, invoking blog controller (with an URL like '/blog/') # without parameters will activate the 'list' action by default. # # == Defaults routes and default parameters # # Setting a default route is straightforward in Rails - you simply append a # Hash at the end of your mapping to set any default parameters. # # Example: # # ActionController::Routing:Routes.draw do |map| # map.connect ':controller/:action/:id', :controller => 'blog' # end # # This sets up +blog+ as the default controller if no other is specified. # This means visiting '/' would invoke the blog controller. # # More formally, you can include arbitrary parameters in the route, thus: # # map.connect ':controller/:action/:id', :action => 'show', :page => 'Dashboard' # # This will pass the :page parameter to all incoming requests that match this route. # # Note: The default routes, as provided by the Rails generator, make all actions in every # controller accessible via GET requests. You should consider removing them or commenting # them out if you're using named routes and resources. # # == Named routes # # Routes can be named with the syntax map.name_of_route options, # allowing for easy reference within your source as +name_of_route_url+ # for the full URL and +name_of_route_path+ for the URI path. # # Example: # # # In routes.rb # map.login 'login', :controller => 'accounts', :action => 'login' # # # With render, redirect_to, tests, etc. # redirect_to login_url # # Arguments can be passed as well. # # redirect_to show_item_path(:id => 25) # # Use map.root as a shorthand to name a route for the root path "". # # # In routes.rb # map.root :controller => 'blogs' # # # would recognize http://www.example.com/ as # params = { :controller => 'blogs', :action => 'index' } # # # and provide these named routes # root_url # => 'http://www.example.com/' # root_path # => '' # # You can also specify an already-defined named route in your map.root call: # # # In routes.rb # map.new_session :controller => 'sessions', :action => 'new' # map.root :new_session # # Note: when using +with_options+, the route is simply named after the # method you call on the block parameter rather than map. # # # In routes.rb # map.with_options :controller => 'blog' do |blog| # blog.show '', :action => 'list' # blog.delete 'delete/:id', :action => 'delete' # blog.edit 'edit/:id', :action => 'edit' # end # # # provides named routes for show, delete, and edit # link_to @article.title, show_path(:id => @article.id) # # == Pretty URLs # # Routes can generate pretty URLs. For example: # # map.connect 'articles/:year/:month/:day', # :controller => 'articles', # :action => 'find_by_date', # :year => /\d{4}/, # :month => /\d{1,2}/, # :day => /\d{1,2}/ # # Using the route above, the URL "http://localhost:3000/articles/2005/11/06" # maps to # # params = {:year => '2005', :month => '11', :day => '06'} # # == Regular Expressions and parameters # You can specify a regular expression to define a format for a parameter. # # map.geocode 'geocode/:postalcode', :controller => 'geocode', # :action => 'show', :postalcode => /\d{5}(-\d{4})?/ # # or, more formally: # # map.geocode 'geocode/:postalcode', :controller => 'geocode', # :action => 'show', :requirements => { :postalcode => /\d{5}(-\d{4})?/ } # # Formats can include the 'ignorecase' and 'extended syntax' regular # expression modifiers: # # map.geocode 'geocode/:postalcode', :controller => 'geocode', # :action => 'show', :postalcode => /hx\d\d\s\d[a-z]{2}/i # # map.geocode 'geocode/:postalcode', :controller => 'geocode', # :action => 'show',:requirements => { # :postalcode => /# Postcode format # \d{5} #Prefix # (-\d{4})? #Suffix # /x # } # # Using the multiline match modifier will raise an ArgumentError. # Encoding regular expression modifiers are silently ignored. The # match will always use the default encoding or ASCII. # # == Route globbing # # Specifying *[string] as part of a rule like: # # map.connect '*path' , :controller => 'blog' , :action => 'unrecognized?' # # will glob all remaining parts of the route that were not recognized earlier. # The globbed values are in params[:path] as an array of path segments. # # == Route conditions # # With conditions you can define restrictions on routes. Currently the only valid condition is :method. # # * :method - Allows you to specify which method can access the route. Possible values are :post, # :get, :put, :delete and :any. The default value is :any, # :any means that any method can access the route. # # Example: # # map.connect 'post/:id', :controller => 'posts', :action => 'show', # :conditions => { :method => :get } # map.connect 'post/:id', :controller => 'posts', :action => 'create_comment', # :conditions => { :method => :post } # # Now, if you POST to /posts/:id, it will route to the create_comment action. A GET on the same # URL will route to the show action. # # == Reloading routes # # You can reload routes if you feel you must: # # ActionController::Routing::Routes.reload # # This will clear all named routes and reload routes.rb if the file has been modified from # last load. To absolutely force reloading, use reload!. # # == Testing Routes # # The two main methods for testing your routes: # # === +assert_routing+ # # def test_movie_route_properly_splits # opts = {:controller => "plugin", :action => "checkout", :id => "2"} # assert_routing "plugin/checkout/2", opts # end # # +assert_routing+ lets you test whether or not the route properly resolves into options. # # === +assert_recognizes+ # # def test_route_has_options # opts = {:controller => "plugin", :action => "show", :id => "12"} # assert_recognizes opts, "/plugins/show/12" # end # # Note the subtle difference between the two: +assert_routing+ tests that # a URL fits options while +assert_recognizes+ tests that a URL # breaks into parameters properly. # # In tests you can simply pass the URL or named route to +get+ or +post+. # # def send_to_jail # get '/jail' # assert_response :success # assert_template "jail/front" # end # # def goes_to_login # get login_url # #... # end # # == View a list of all your routes # # Run rake routes. # module Routing autoload :DeprecatedMapper, 'action_dispatch/routing/deprecated_mapper' autoload :Mapper, 'action_dispatch/routing/mapper' autoload :Route, 'action_dispatch/routing/route' autoload :RouteSet, 'action_dispatch/routing/route_set' SEPARATORS = %w( / . ? ) HTTP_METHODS = [:get, :head, :post, :put, :delete, :options] # The root paths which may contain controller files mattr_accessor :controller_paths self.controller_paths = [] # A helper module to hold URL related helpers. module Helpers include ActionController::PolymorphicRoutes end class << self def controller_constraints Regexp.union(*possible_controllers.collect { |n| Regexp.escape(n) }) end # Expects an array of controller names as the first argument. # Executes the passed block with only the named controllers named available. # This method is used in internal Rails testing. def with_controllers(names) prior_controllers = @possible_controllers use_controllers! names yield ensure use_controllers! prior_controllers end # Returns an array of paths, cleaned of double-slashes and relative path references. # * "\\\" and "//" become "\\" or "/". # * "/foo/bar/../config" becomes "/foo/config". # The returned array is sorted by length, descending. def normalize_paths(paths) # do the hokey-pokey of path normalization... paths = paths.collect do |path| path = path. gsub("//", "/"). # replace double / chars with a single gsub("\\\\", "\\"). # replace double \ chars with a single gsub(%r{(.)[\\/]$}, '\1') # drop final / or \ if path ends with it # eliminate .. paths where possible re = %r{[^/\\]+[/\\]\.\.[/\\]} path.gsub!(re, "") while path.match(re) path end # start with longest path, first paths = paths.uniq.sort_by { |path| - path.length } end # Returns the array of controller names currently available to ActionController::Routing. def possible_controllers unless @possible_controllers @possible_controllers = [] paths = controller_paths.select { |path| File.directory?(path) && path != "." } seen_paths = Hash.new {|h, k| h[k] = true; false} normalize_paths(paths).each do |load_path| Dir["#{load_path}/**/*_controller.rb"].collect do |path| next if seen_paths[path.gsub(%r{^\.[/\\]}, "")] controller_name = path[(load_path.length + 1)..-1] controller_name.gsub!(/_controller\.rb\Z/, '') @possible_controllers << controller_name end end # remove duplicates @possible_controllers.uniq! end @possible_controllers end # Replaces the internal list of controllers available to ActionController::Routing with the passed argument. # ActionController::Routing.use_controllers!([ "posts", "comments", "admin/comments" ]) def use_controllers!(controller_names) @possible_controllers = controller_names end end end end