From a74022ecd3e078f55ed6049a96565119dc540ff5 Mon Sep 17 00:00:00 2001 From: Joshua Peek Date: Tue, 20 Oct 2009 10:14:46 -0500 Subject: Move Routing into AD --- .../lib/action_dispatch/routing/resources.rb | 687 ++++++++++++++++++++ .../lib/action_dispatch/routing/route_set.rb | 699 +++++++++++++++++++++ 2 files changed, 1386 insertions(+) create mode 100644 actionpack/lib/action_dispatch/routing/resources.rb create mode 100644 actionpack/lib/action_dispatch/routing/route_set.rb (limited to 'actionpack/lib/action_dispatch/routing') diff --git a/actionpack/lib/action_dispatch/routing/resources.rb b/actionpack/lib/action_dispatch/routing/resources.rb new file mode 100644 index 0000000000..ada0d0a648 --- /dev/null +++ b/actionpack/lib/action_dispatch/routing/resources.rb @@ -0,0 +1,687 @@ +require 'active_support/core_ext/hash/slice' +require 'active_support/core_ext/object/try' + +module ActionDispatch + module Routing + # == Overview + # + # ActionController::Resources are a way of defining RESTful \resources. A RESTful \resource, in basic terms, + # is something that can be pointed at and it will respond with a representation of the data requested. + # In real terms this could mean a user with a browser requests an HTML page, or that a desktop application + # requests XML data. + # + # RESTful design is based on the assumption that there are four generic verbs that a user of an + # application can request from a \resource (the noun). + # + # \Resources can be requested using four basic HTTP verbs (GET, POST, PUT, DELETE), the method used + # denotes the type of action that should take place. + # + # === The Different Methods and their Usage + # + # * GET - Requests for a \resource, no saving or editing of a \resource should occur in a GET request. + # * POST - Creation of \resources. + # * PUT - Editing of attributes on a \resource. + # * DELETE - Deletion of a \resource. + # + # === Examples + # + # # A GET request on the Posts resource is asking for all Posts + # GET /posts + # + # # A GET request on a single Post resource is asking for that particular Post + # GET /posts/1 + # + # # A POST request on the Posts resource is asking for a Post to be created with the supplied details + # POST /posts # with => { :post => { :title => "My Whizzy New Post", :body => "I've got a brand new combine harvester" } } + # + # # A PUT request on a single Post resource is asking for a Post to be updated + # PUT /posts # with => { :id => 1, :post => { :title => "Changed Whizzy Title" } } + # + # # A DELETE request on a single Post resource is asking for it to be deleted + # DELETE /posts # with => { :id => 1 } + # + # By using the REST convention, users of our application can assume certain things about how the data + # is requested and how it is returned. Rails simplifies the routing part of RESTful design by + # supplying you with methods to create them in your routes.rb file. + # + # Read more about REST at http://en.wikipedia.org/wiki/Representational_State_Transfer + module Resources + INHERITABLE_OPTIONS = :namespace, :shallow + + class Resource #:nodoc: + DEFAULT_ACTIONS = :index, :create, :new, :edit, :show, :update, :destroy + + attr_reader :collection_methods, :member_methods, :new_methods + attr_reader :path_prefix, :name_prefix, :path_segment + attr_reader :plural, :singular + attr_reader :options + + def initialize(entities, options) + @plural ||= entities + @singular ||= options[:singular] || plural.to_s.singularize + @path_segment = options.delete(:as) || @plural + + @options = options + + arrange_actions + add_default_actions + set_allowed_actions + set_prefixes + end + + def controller + @controller ||= "#{options[:namespace]}#{(options[:controller] || plural).to_s}" + end + + def requirements(with_id = false) + @requirements ||= @options[:requirements] || {} + @id_requirement ||= { :id => @requirements.delete(:id) || /[^#{Routing::SEPARATORS.join}]+/ } + + with_id ? @requirements.merge(@id_requirement) : @requirements + end + + def conditions + @conditions ||= @options[:conditions] || {} + end + + def path + @path ||= "#{path_prefix}/#{path_segment}" + end + + def new_path + new_action = self.options[:path_names][:new] if self.options[:path_names] + new_action ||= ActionController::Base.resources_path_names[:new] + @new_path ||= "#{path}/#{new_action}" + end + + def shallow_path_prefix + @shallow_path_prefix ||= @options[:shallow] ? @options[:namespace].try(:sub, /\/$/, '') : path_prefix + end + + def member_path + @member_path ||= "#{shallow_path_prefix}/#{path_segment}/:id" + end + + def nesting_path_prefix + @nesting_path_prefix ||= "#{shallow_path_prefix}/#{path_segment}/:#{singular}_id" + end + + def shallow_name_prefix + @shallow_name_prefix ||= @options[:shallow] ? @options[:namespace].try(:gsub, /\//, '_') : name_prefix + end + + def nesting_name_prefix + "#{shallow_name_prefix}#{singular}_" + end + + def action_separator + @action_separator ||= ActionController::Base.resource_action_separator + end + + def uncountable? + @singular.to_s == @plural.to_s + end + + def has_action?(action) + !DEFAULT_ACTIONS.include?(action) || action_allowed?(action) + end + + protected + def arrange_actions + @collection_methods = arrange_actions_by_methods(options.delete(:collection)) + @member_methods = arrange_actions_by_methods(options.delete(:member)) + @new_methods = arrange_actions_by_methods(options.delete(:new)) + end + + def add_default_actions + add_default_action(member_methods, :get, :edit) + add_default_action(new_methods, :get, :new) + end + + def set_allowed_actions + only, except = @options.values_at(:only, :except) + @allowed_actions ||= {} + + if only == :all || except == :none + only = nil + except = [] + elsif only == :none || except == :all + only = [] + except = nil + end + + if only + @allowed_actions[:only] = Array(only).map {|a| a.to_sym } + elsif except + @allowed_actions[:except] = Array(except).map {|a| a.to_sym } + end + end + + def action_allowed?(action) + only, except = @allowed_actions.values_at(:only, :except) + (!only || only.include?(action)) && (!except || !except.include?(action)) + end + + def set_prefixes + @path_prefix = options.delete(:path_prefix) + @name_prefix = options.delete(:name_prefix) + end + + def arrange_actions_by_methods(actions) + (actions || {}).inject({}) do |flipped_hash, (key, value)| + (flipped_hash[value] ||= []) << key + flipped_hash + end + end + + def add_default_action(collection, method, action) + (collection[method] ||= []).unshift(action) + end + end + + class SingletonResource < Resource #:nodoc: + def initialize(entity, options) + @singular = @plural = entity + options[:controller] ||= @singular.to_s.pluralize + super + end + + alias_method :shallow_path_prefix, :path_prefix + alias_method :shallow_name_prefix, :name_prefix + alias_method :member_path, :path + alias_method :nesting_path_prefix, :path + end + + # Creates named routes for implementing verb-oriented controllers + # for a collection \resource. + # + # For example: + # + # map.resources :messages + # + # will map the following actions in the corresponding controller: + # + # class MessagesController < ActionController::Base + # # GET messages_url + # def index + # # return all messages + # end + # + # # GET new_message_url + # def new + # # return an HTML form for describing a new message + # end + # + # # POST messages_url + # def create + # # create a new message + # end + # + # # GET message_url(:id => 1) + # def show + # # find and return a specific message + # end + # + # # GET edit_message_url(:id => 1) + # def edit + # # return an HTML form for editing a specific message + # end + # + # # PUT message_url(:id => 1) + # def update + # # find and update a specific message + # end + # + # # DELETE message_url(:id => 1) + # def destroy + # # delete a specific message + # end + # end + # + # Along with the routes themselves, +resources+ generates named routes for use in + # controllers and views. map.resources :messages produces the following named routes and helpers: + # + # Named Route Helpers + # ============ ===================================================== + # messages messages_url, hash_for_messages_url, + # messages_path, hash_for_messages_path + # + # message message_url(id), hash_for_message_url(id), + # message_path(id), hash_for_message_path(id) + # + # new_message new_message_url, hash_for_new_message_url, + # new_message_path, hash_for_new_message_path + # + # edit_message edit_message_url(id), hash_for_edit_message_url(id), + # edit_message_path(id), hash_for_edit_message_path(id) + # + # You can use these helpers instead of +url_for+ or methods that take +url_for+ parameters. For example: + # + # redirect_to :controller => 'messages', :action => 'index' + # # and + # <%= link_to "edit this message", :controller => 'messages', :action => 'edit', :id => @message.id %> + # + # now become: + # + # redirect_to messages_url + # # and + # <%= link_to "edit this message", edit_message_url(@message) # calls @message.id automatically + # + # Since web browsers don't support the PUT and DELETE verbs, you will need to add a parameter '_method' to your + # form tags. The form helpers make this a little easier. For an update form with a @message object: + # + # <%= form_tag message_path(@message), :method => :put %> + # + # or + # + # <% form_for :message, @message, :url => message_path(@message), :html => {:method => :put} do |f| %> + # + # or + # + # <% form_for @message do |f| %> + # + # which takes into account whether @message is a new record or not and generates the + # path and method accordingly. + # + # The +resources+ method accepts the following options to customize the resulting routes: + # * :collection - Add named routes for other actions that operate on the collection. + # Takes a hash of #{action} => #{method}, where method is :get/:post/:put/:delete, + # an array of any of the previous, or :any if the method does not matter. + # These routes map to a URL like /messages/rss, with a route of +rss_messages_url+. + # * :member - Same as :collection, but for actions that operate on a specific member. + # * :new - Same as :collection, but for actions that operate on the new \resource action. + # * :controller - Specify the controller name for the routes. + # * :singular - Specify the singular name used in the member routes. + # * :requirements - Set custom routing parameter requirements; this is a hash of either + # regular expressions (which must match for the route to match) or extra parameters. For example: + # + # map.resource :profile, :path_prefix => ':name', :requirements => { :name => /[a-zA-Z]+/, :extra => 'value' } + # + # will only match if the first part is alphabetic, and will pass the parameter :extra to the controller. + # * :conditions - Specify custom routing recognition conditions. \Resources sets the :method value for the method-specific routes. + # * :as - Specify a different \resource name to use in the URL path. For example: + # # products_path == '/productos' + # map.resources :products, :as => 'productos' do |product| + # # product_reviews_path(product) == '/productos/1234/comentarios' + # product.resources :product_reviews, :as => 'comentarios' + # end + # + # * :has_one - Specify nested \resources, this is a shorthand for mapping singleton \resources beneath the current. + # * :has_many - Same has :has_one, but for plural \resources. + # + # You may directly specify the routing association with +has_one+ and +has_many+ like: + # + # map.resources :notes, :has_one => :author, :has_many => [:comments, :attachments] + # + # This is the same as: + # + # map.resources :notes do |notes| + # notes.resource :author + # notes.resources :comments + # notes.resources :attachments + # end + # + # * :path_names - Specify different path names for the actions. For example: + # # new_products_path == '/productos/nuevo' + # # bids_product_path(1) == '/productos/1/licitacoes' + # map.resources :products, :as => 'productos', :member => { :bids => :get }, :path_names => { :new => 'nuevo', :bids => 'licitacoes' } + # + # You can also set default action names from an environment, like this: + # config.action_controller.resources_path_names = { :new => 'nuevo', :edit => 'editar' } + # + # * :path_prefix - Set a prefix to the routes with required route variables. + # + # Weblog comments usually belong to a post, so you might use +resources+ like: + # + # map.resources :articles + # map.resources :comments, :path_prefix => '/articles/:article_id' + # + # You can nest +resources+ calls to set this automatically: + # + # map.resources :articles do |article| + # article.resources :comments + # end + # + # The comment \resources work the same, but must now include a value for :article_id. + # + # article_comments_url(@article) + # article_comment_url(@article, @comment) + # + # article_comments_url(:article_id => @article) + # article_comment_url(:article_id => @article, :id => @comment) + # + # If you don't want to load all objects from the database you might want to use the article_id directly: + # + # articles_comments_url(@comment.article_id, @comment) + # + # * :name_prefix - Define a prefix for all generated routes, usually ending in an underscore. + # Use this if you have named routes that may clash. + # + # map.resources :tags, :path_prefix => '/books/:book_id', :name_prefix => 'book_' + # map.resources :tags, :path_prefix => '/toys/:toy_id', :name_prefix => 'toy_' + # + # You may also use :name_prefix to override the generic named routes in a nested \resource: + # + # map.resources :articles do |article| + # article.resources :comments, :name_prefix => nil + # end + # + # This will yield named \resources like so: + # + # comments_url(@article) + # comment_url(@article, @comment) + # + # * :shallow - If true, paths for nested resources which reference a specific member + # (ie. those with an :id parameter) will not use the parent path prefix or name prefix. + # + # The :shallow option is inherited by any nested resource(s). + # + # For example, 'users', 'posts' and 'comments' all use shallow paths with the following nested resources: + # + # map.resources :users, :shallow => true do |user| + # user.resources :posts do |post| + # post.resources :comments + # end + # end + # # --> GET /users/1/posts (maps to the PostsController#index action as usual) + # # also adds the usual named route called "user_posts" + # # --> GET /posts/2 (maps to the PostsController#show action as if it were not nested) + # # also adds the named route called "post" + # # --> GET /posts/2/comments (maps to the CommentsController#index action) + # # also adds the named route called "post_comments" + # # --> GET /comments/2 (maps to the CommentsController#show action as if it were not nested) + # # also adds the named route called "comment" + # + # You may also use :shallow in combination with the +has_one+ and +has_many+ shorthand notations like: + # + # map.resources :users, :has_many => { :posts => :comments }, :shallow => true + # + # * :only and :except - Specify which of the seven default actions should be routed to. + # + # :only and :except may be set to :all, :none, an action name or a + # list of action names. By default, routes are generated for all seven actions. + # + # For example: + # + # map.resources :posts, :only => [:index, :show] do |post| + # post.resources :comments, :except => [:update, :destroy] + # end + # # --> GET /posts (maps to the PostsController#index action) + # # --> POST /posts (fails) + # # --> GET /posts/1 (maps to the PostsController#show action) + # # --> DELETE /posts/1 (fails) + # # --> POST /posts/1/comments (maps to the CommentsController#create action) + # # --> PUT /posts/1/comments/1 (fails) + # + # If map.resources is called with multiple resources, they all get the same options applied. + # + # Examples: + # + # map.resources :messages, :path_prefix => "/thread/:thread_id" + # # --> GET /thread/7/messages/1 + # + # map.resources :messages, :collection => { :rss => :get } + # # --> GET /messages/rss (maps to the #rss action) + # # also adds a named route called "rss_messages" + # + # map.resources :messages, :member => { :mark => :post } + # # --> POST /messages/1/mark (maps to the #mark action) + # # also adds a named route called "mark_message" + # + # map.resources :messages, :new => { :preview => :post } + # # --> POST /messages/new/preview (maps to the #preview action) + # # also adds a named route called "preview_new_message" + # + # map.resources :messages, :new => { :new => :any, :preview => :post } + # # --> POST /messages/new/preview (maps to the #preview action) + # # also adds a named route called "preview_new_message" + # # --> /messages/new can be invoked via any request method + # + # map.resources :messages, :controller => "categories", + # :path_prefix => "/category/:category_id", + # :name_prefix => "category_" + # # --> GET /categories/7/messages/1 + # # has named route "category_message" + # + # The +resources+ method sets HTTP method restrictions on the routes it generates. For example, making an + # HTTP POST on new_message_url will raise a RoutingError exception. The default route in + # config/routes.rb overrides this and allows invalid HTTP methods for \resource routes. + def resources(*entities, &block) + options = entities.extract_options! + entities.each { |entity| map_resource(entity, options.dup, &block) } + end + + # Creates named routes for implementing verb-oriented controllers for a singleton \resource. + # A singleton \resource is global to its current context. For unnested singleton \resources, + # the \resource is global to the current user visiting the application, such as a user's + # /account profile. For nested singleton \resources, the \resource is global to its parent + # \resource, such as a projects \resource that has_one :project_manager. + # The project_manager should be mapped as a singleton \resource under projects: + # + # map.resources :projects do |project| + # project.resource :project_manager + # end + # + # See +resources+ for general conventions. These are the main differences: + # * A singular name is given to map.resource. The default controller name is still taken from the plural name. + # * To specify a custom plural name, use the :plural option. There is no :singular option. + # * No default index route is created for the singleton \resource controller. + # * When nesting singleton \resources, only the singular name is used as the path prefix (example: 'account/messages/1') + # + # For example: + # + # map.resource :account + # + # maps these actions in the Accounts controller: + # + # class AccountsController < ActionController::Base + # # GET new_account_url + # def new + # # return an HTML form for describing the new account + # end + # + # # POST account_url + # def create + # # create an account + # end + # + # # GET account_url + # def show + # # find and return the account + # end + # + # # GET edit_account_url + # def edit + # # return an HTML form for editing the account + # end + # + # # PUT account_url + # def update + # # find and update the account + # end + # + # # DELETE account_url + # def destroy + # # delete the account + # end + # end + # + # Along with the routes themselves, +resource+ generates named routes for + # use in controllers and views. map.resource :account produces + # these named routes and helpers: + # + # Named Route Helpers + # ============ ============================================= + # account account_url, hash_for_account_url, + # account_path, hash_for_account_path + # + # new_account new_account_url, hash_for_new_account_url, + # new_account_path, hash_for_new_account_path + # + # edit_account edit_account_url, hash_for_edit_account_url, + # edit_account_path, hash_for_edit_account_path + def resource(*entities, &block) + options = entities.extract_options! + entities.each { |entity| map_singleton_resource(entity, options.dup, &block) } + end + + private + def map_resource(entities, options = {}, &block) + resource = Resource.new(entities, options) + + with_options :controller => resource.controller do |map| + map_associations(resource, options) + + if block_given? + with_options(options.slice(*INHERITABLE_OPTIONS).merge(:path_prefix => resource.nesting_path_prefix, :name_prefix => resource.nesting_name_prefix), &block) + end + + map_collection_actions(map, resource) + map_default_collection_actions(map, resource) + map_new_actions(map, resource) + map_member_actions(map, resource) + end + end + + def map_singleton_resource(entities, options = {}, &block) + resource = SingletonResource.new(entities, options) + + with_options :controller => resource.controller do |map| + map_associations(resource, options) + + if block_given? + with_options(options.slice(*INHERITABLE_OPTIONS).merge(:path_prefix => resource.nesting_path_prefix, :name_prefix => resource.nesting_name_prefix), &block) + end + + map_collection_actions(map, resource) + map_new_actions(map, resource) + map_member_actions(map, resource) + map_default_singleton_actions(map, resource) + end + end + + def map_associations(resource, options) + map_has_many_associations(resource, options.delete(:has_many), options) if options[:has_many] + + path_prefix = "#{options.delete(:path_prefix)}#{resource.nesting_path_prefix}" + name_prefix = "#{options.delete(:name_prefix)}#{resource.nesting_name_prefix}" + + Array(options[:has_one]).each do |association| + resource(association, options.slice(*INHERITABLE_OPTIONS).merge(:path_prefix => path_prefix, :name_prefix => name_prefix)) + end + end + + def map_has_many_associations(resource, associations, options) + case associations + when Hash + associations.each do |association,has_many| + map_has_many_associations(resource, association, options.merge(:has_many => has_many)) + end + when Array + associations.each do |association| + map_has_many_associations(resource, association, options) + end + when Symbol, String + resources(associations, options.slice(*INHERITABLE_OPTIONS).merge(:path_prefix => resource.nesting_path_prefix, :name_prefix => resource.nesting_name_prefix, :has_many => options[:has_many])) + else + end + end + + def map_collection_actions(map, resource) + resource.collection_methods.each do |method, actions| + actions.each do |action| + [method].flatten.each do |m| + action_path = resource.options[:path_names][action] if resource.options[:path_names].is_a?(Hash) + action_path ||= action + + map_resource_routes(map, resource, action, "#{resource.path}#{resource.action_separator}#{action_path}", "#{action}_#{resource.name_prefix}#{resource.plural}", m) + end + end + end + end + + def map_default_collection_actions(map, resource) + index_route_name = "#{resource.name_prefix}#{resource.plural}" + + if resource.uncountable? + index_route_name << "_index" + end + + map_resource_routes(map, resource, :index, resource.path, index_route_name) + map_resource_routes(map, resource, :create, resource.path, index_route_name) + end + + def map_default_singleton_actions(map, resource) + map_resource_routes(map, resource, :create, resource.path, "#{resource.shallow_name_prefix}#{resource.singular}") + end + + def map_new_actions(map, resource) + resource.new_methods.each do |method, actions| + actions.each do |action| + route_path = resource.new_path + route_name = "new_#{resource.name_prefix}#{resource.singular}" + + unless action == :new + route_path = "#{route_path}#{resource.action_separator}#{action}" + route_name = "#{action}_#{route_name}" + end + + map_resource_routes(map, resource, action, route_path, route_name, method) + end + end + end + + def map_member_actions(map, resource) + resource.member_methods.each do |method, actions| + actions.each do |action| + [method].flatten.each do |m| + action_path = resource.options[:path_names][action] if resource.options[:path_names].is_a?(Hash) + action_path ||= ActionController::Base.resources_path_names[action] || action + + map_resource_routes(map, resource, action, "#{resource.member_path}#{resource.action_separator}#{action_path}", "#{action}_#{resource.shallow_name_prefix}#{resource.singular}", m, { :force_id => true }) + end + end + end + + route_path = "#{resource.shallow_name_prefix}#{resource.singular}" + map_resource_routes(map, resource, :show, resource.member_path, route_path) + map_resource_routes(map, resource, :update, resource.member_path, route_path) + map_resource_routes(map, resource, :destroy, resource.member_path, route_path) + end + + def map_resource_routes(map, resource, action, route_path, route_name = nil, method = nil, resource_options = {} ) + if resource.has_action?(action) + action_options = action_options_for(action, resource, method, resource_options) + formatted_route_path = "#{route_path}.:format" + + if route_name && @set.named_routes[route_name.to_sym].nil? + map.named_route(route_name, formatted_route_path, action_options) + else + map.connect(formatted_route_path, action_options) + end + end + end + + def add_conditions_for(conditions, method) + returning({:conditions => conditions.dup}) do |options| + options[:conditions][:method] = method unless method == :any + end + end + + def action_options_for(action, resource, method = nil, resource_options = {}) + default_options = { :action => action.to_s } + require_id = !resource.kind_of?(SingletonResource) + force_id = resource_options[:force_id] && !resource.kind_of?(SingletonResource) + + case default_options[:action] + when "index", "new"; default_options.merge(add_conditions_for(resource.conditions, method || :get)).merge(resource.requirements) + when "create"; default_options.merge(add_conditions_for(resource.conditions, method || :post)).merge(resource.requirements) + when "show", "edit"; default_options.merge(add_conditions_for(resource.conditions, method || :get)).merge(resource.requirements(require_id)) + when "update"; default_options.merge(add_conditions_for(resource.conditions, method || :put)).merge(resource.requirements(require_id)) + when "destroy"; default_options.merge(add_conditions_for(resource.conditions, method || :delete)).merge(resource.requirements(require_id)) + else default_options.merge(add_conditions_for(resource.conditions, method)).merge(resource.requirements(force_id)) + end + end + end + end +end diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb new file mode 100644 index 0000000000..9e40108d00 --- /dev/null +++ b/actionpack/lib/action_dispatch/routing/route_set.rb @@ -0,0 +1,699 @@ +require 'rack/mount' +require 'forwardable' + +module ActionDispatch + module Routing + class RouteSet #:nodoc: + NotFound = lambda { |env| + raise ActionController::RoutingError, "No route matches #{env[::Rack::Mount::Const::PATH_INFO].inspect} with #{env.inspect}" + } + + PARAMETERS_KEY = 'action_dispatch.request.path_parameters' + + class Dispatcher + def initialize(options = {}) + defaults = options[:defaults] + @glob_param = options.delete(:glob) + end + + def call(env) + params = env[PARAMETERS_KEY] + merge_default_action!(params) + split_glob_param!(params) if @glob_param + params.each { |key, value| params[key] = URI.unescape(value) if value.is_a?(String) } + + if env['action_controller.recognize'] + [200, {}, params] + else + controller = controller(params) + controller.action(params[:action]).call(env) + end + end + + private + def controller(params) + if params && params.has_key?(:controller) + controller = "#{params[:controller].camelize}Controller" + ActiveSupport::Inflector.constantize(controller) + end + end + + def merge_default_action!(params) + params[:action] ||= 'index' + end + + def split_glob_param!(params) + params[@glob_param] = params[@glob_param].split('/').map { |v| URI.unescape(v) } + end + end + + module RouteExtensions + def segment_keys + conditions[:path_info].names.compact.map { |key| key.to_sym } + end + end + + # Mapper instances are used to build routes. The object passed to the draw + # block in config/routes.rb is a Mapper instance. + # + # Mapper instances have relatively few instance methods, in order to avoid + # clashes with named routes. + class Mapper #:doc: + include Routing::Resources + + def initialize(set) #:nodoc: + @set = set + end + + # Create an unnamed route with the provided +path+ and +options+. See + # ActionDispatch::Routing for an introduction to routes. + def connect(path, options = {}) + @set.add_route(path, options) + end + + # Creates a named route called "root" for matching the root level request. + def root(options = {}) + if options.is_a?(Symbol) + if source_route = @set.named_routes.routes[options] + options = source_route.defaults.merge({ :conditions => source_route.conditions }) + end + end + named_route("root", '', options) + end + + def named_route(name, path, options = {}) #:nodoc: + @set.add_named_route(name, path, options) + end + + # Enables the use of resources in a module by setting the name_prefix, path_prefix, and namespace for the model. + # Example: + # + # map.namespace(:admin) do |admin| + # admin.resources :products, + # :has_many => [ :tags, :images, :variants ] + # end + # + # This will create +admin_products_url+ pointing to "admin/products", which will look for an Admin::ProductsController. + # It'll also create +admin_product_tags_url+ pointing to "admin/products/#{product_id}/tags", which will look for + # Admin::TagsController. + def namespace(name, options = {}, &block) + if options[:namespace] + with_options({:path_prefix => "#{options.delete(:path_prefix)}/#{name}", :name_prefix => "#{options.delete(:name_prefix)}#{name}_", :namespace => "#{options.delete(:namespace)}#{name}/" }.merge(options), &block) + else + with_options({:path_prefix => name, :name_prefix => "#{name}_", :namespace => "#{name}/" }.merge(options), &block) + end + end + + def method_missing(route_name, *args, &proc) #:nodoc: + super unless args.length >= 1 && proc.nil? + @set.add_named_route(route_name, *args) + end + end + + # A NamedRouteCollection instance is a collection of named routes, and also + # maintains an anonymous module that can be used to install helpers for the + # named routes. + class NamedRouteCollection #:nodoc: + include Enumerable + attr_reader :routes, :helpers + + def initialize + clear! + end + + def clear! + @routes = {} + @helpers = [] + + @module ||= Module.new + @module.instance_methods.each do |selector| + @module.class_eval { remove_method selector } + end + end + + def add(name, route) + routes[name.to_sym] = route + define_named_route_methods(name, route) + end + + def get(name) + routes[name.to_sym] + end + + alias []= add + alias [] get + alias clear clear! + + def each + routes.each { |name, route| yield name, route } + self + end + + def names + routes.keys + end + + def length + routes.length + end + + def reset! + old_routes = routes.dup + clear! + old_routes.each do |name, route| + add(name, route) + end + end + + def install(destinations = [ActionController::Base, ActionView::Base], regenerate = false) + reset! if regenerate + Array(destinations).each do |dest| + dest.__send__(:include, @module) + end + end + + private + def url_helper_name(name, kind = :url) + :"#{name}_#{kind}" + end + + def hash_access_name(name, kind = :url) + :"hash_for_#{name}_#{kind}" + end + + def define_named_route_methods(name, route) + {:url => {:only_path => false}, :path => {:only_path => true}}.each do |kind, opts| + hash = route.defaults.merge(:use_route => name).merge(opts) + define_hash_access route, name, kind, hash + define_url_helper route, name, kind, hash + end + end + + def named_helper_module_eval(code, *args) + @module.module_eval(code, *args) + end + + def define_hash_access(route, name, kind, options) + selector = hash_access_name(name, kind) + named_helper_module_eval <<-end_eval # We use module_eval to avoid leaks + def #{selector}(options = nil) # def hash_for_users_url(options = nil) + options ? #{options.inspect}.merge(options) : #{options.inspect} # options ? {:only_path=>false}.merge(options) : {:only_path=>false} + end # end + protected :#{selector} # protected :hash_for_users_url + end_eval + helpers << selector + end + + def define_url_helper(route, name, kind, options) + selector = url_helper_name(name, kind) + # The segment keys used for positional parameters + + hash_access_method = hash_access_name(name, kind) + + # allow ordered parameters to be associated with corresponding + # dynamic segments, so you can do + # + # foo_url(bar, baz, bang) + # + # instead of + # + # foo_url(:bar => bar, :baz => baz, :bang => bang) + # + # Also allow options hash, so you can do + # + # foo_url(bar, baz, bang, :sort_by => 'baz') + # + named_helper_module_eval <<-end_eval # We use module_eval to avoid leaks + def #{selector}(*args) # def users_url(*args) + # + opts = if args.empty? || Hash === args.first # opts = if args.empty? || Hash === args.first + args.first || {} # args.first || {} + else # else + options = args.extract_options! # options = args.extract_options! + args = args.zip(#{route.segment_keys.inspect}).inject({}) do |h, (v, k)| # args = args.zip([]).inject({}) do |h, (v, k)| + h[k] = v # h[k] = v + h # h + end # end + options.merge(args) # options.merge(args) + end # end + # + url_for(#{hash_access_method}(opts)) # url_for(hash_for_users_url(opts)) + # + end # end + #Add an alias to support the now deprecated formatted_* URL. # #Add an alias to support the now deprecated formatted_* URL. + def formatted_#{selector}(*args) # def formatted_users_url(*args) + ActiveSupport::Deprecation.warn( # ActiveSupport::Deprecation.warn( + "formatted_#{selector}() has been deprecated. " + # "formatted_users_url() has been deprecated. " + + "Please pass format to the standard " + # "Please pass format to the standard " + + "#{selector} method instead.", caller) # "users_url method instead.", caller) + #{selector}(*args) # users_url(*args) + end # end + protected :#{selector} # protected :users_url + end_eval + helpers << selector + end + end + + attr_accessor :routes, :named_routes, :configuration_files + + def initialize + self.configuration_files = [] + + self.routes = [] + self.named_routes = NamedRouteCollection.new + + clear! + end + + def draw + clear! + yield Mapper.new(self) + @set.add_route(NotFound) + install_helpers + @set.freeze + end + + def clear! + routes.clear + named_routes.clear + @set = ::Rack::Mount::RouteSet.new(:parameters_key => PARAMETERS_KEY) + end + + def install_helpers(destinations = [ActionController::Base, ActionView::Base], regenerate_code = false) + Array(destinations).each { |d| d.module_eval { include Helpers } } + named_routes.install(destinations, regenerate_code) + end + + def empty? + routes.empty? + end + + def add_configuration_file(path) + self.configuration_files << path + end + + # Deprecated accessor + def configuration_file=(path) + add_configuration_file(path) + end + + # Deprecated accessor + def configuration_file + configuration_files + end + + def load! + Routing.use_controllers!(nil) # Clear the controller cache so we may discover new ones + load_routes! + end + + # reload! will always force a reload whereas load checks the timestamp first + alias reload! load! + + def reload + if configuration_files.any? && @routes_last_modified + if routes_changed_at == @routes_last_modified + return # routes didn't change, don't reload + else + @routes_last_modified = routes_changed_at + end + end + + load! + end + + def load_routes! + if configuration_files.any? + configuration_files.each { |config| load(config) } + @routes_last_modified = routes_changed_at + else + draw do |map| + map.connect ":controller/:action/:id" + end + end + end + + def routes_changed_at + routes_changed_at = nil + + configuration_files.each do |config| + config_changed_at = File.stat(config).mtime + + if routes_changed_at.nil? || config_changed_at > routes_changed_at + routes_changed_at = config_changed_at + end + end + + routes_changed_at + end + + def add_route(path, options = {}) + options = options.dup + + if conditions = options.delete(:conditions) + conditions = conditions.dup + method = [conditions.delete(:method)].flatten.compact + method.map! { |m| + m = m.to_s.upcase + + if m == "HEAD" + raise ArgumentError, "HTTP method HEAD is invalid in route conditions. Rails processes HEAD requests the same as GETs, returning just the response headers" + end + + unless HTTP_METHODS.include?(m.downcase.to_sym) + raise ArgumentError, "Invalid HTTP method specified in route conditions" + end + + m + } + + if method.length > 1 + method = Regexp.union(*method) + elsif method.length == 1 + method = method.first + else + method = nil + end + end + + path_prefix = options.delete(:path_prefix) + name_prefix = options.delete(:name_prefix) + namespace = options.delete(:namespace) + + name = options.delete(:_name) + name = "#{name_prefix}#{name}" if name_prefix + + requirements = options.delete(:requirements) || {} + defaults = options.delete(:defaults) || {} + options.each do |k, v| + if v.is_a?(Regexp) + if value = options.delete(k) + requirements[k.to_sym] = value + end + else + value = options.delete(k) + defaults[k.to_sym] = value.is_a?(Symbol) ? value : value.to_param + end + end + + requirements.each do |_, requirement| + if requirement.source =~ %r{\A(\\A|\^)|(\\Z|\\z|\$)\Z} + raise ArgumentError, "Regexp anchor characters are not allowed in routing requirements: #{requirement.inspect}" + end + if requirement.multiline? + raise ArgumentError, "Regexp multiline option not allowed in routing requirements: #{requirement.inspect}" + end + end + + possible_names = Routing.possible_controllers.collect { |n| Regexp.escape(n) } + requirements[:controller] ||= Regexp.union(*possible_names) + + if defaults[:controller] + defaults[:action] ||= 'index' + defaults[:controller] = defaults[:controller].to_s + defaults[:controller] = "#{namespace}#{defaults[:controller]}" if namespace + end + + if defaults[:action] + defaults[:action] = defaults[:action].to_s + end + + if path.is_a?(String) + path = "#{path_prefix}/#{path}" if path_prefix + path = path.gsub('.:format', '(.:format)') + path = optionalize_trailing_dynamic_segments(path, requirements, defaults) + glob = $1.to_sym if path =~ /\/\*(\w+)$/ + path = ::Rack::Mount::Utils.normalize_path(path) + path = ::Rack::Mount::Strexp.compile(path, requirements, %w( / . ? )) + + if glob && !defaults[glob].blank? + raise ActionController::RoutingError, "paths cannot have non-empty default values" + end + end + + app = Dispatcher.new(:defaults => defaults, :glob => glob) + + conditions = {} + conditions[:request_method] = method if method + conditions[:path_info] = path if path + + route = @set.add_route(app, conditions, defaults, name) + route.extend(RouteExtensions) + routes << route + route + end + + def add_named_route(name, path, options = {}) + options[:_name] = name + route = add_route(path, options) + named_routes[route.name] = route + route + end + + def options_as_params(options) + # If an explicit :controller was given, always make :action explicit + # too, so that action expiry works as expected for things like + # + # generate({:controller => 'content'}, {:controller => 'content', :action => 'show'}) + # + # (the above is from the unit tests). In the above case, because the + # controller was explicitly given, but no action, the action is implied to + # be "index", not the recalled action of "show". + # + # great fun, eh? + + options_as_params = options.clone + options_as_params[:action] ||= 'index' if options[:controller] + options_as_params[:action] = options_as_params[:action].to_s if options_as_params[:action] + options_as_params + end + + def build_expiry(options, recall) + recall.inject({}) do |expiry, (key, recalled_value)| + expiry[key] = (options.key?(key) && options[key].to_param != recalled_value.to_param) + expiry + end + end + + # Generate the path indicated by the arguments, and return an array of + # the keys that were not used to generate it. + def extra_keys(options, recall={}) + generate_extras(options, recall).last + end + + def generate_extras(options, recall={}) + generate(options, recall, :generate_extras) + end + + def generate(options, recall = {}, method = :generate) + options, recall = options.dup, recall.dup + named_route = options.delete(:use_route) + + options = options_as_params(options) + expire_on = build_expiry(options, recall) + + recall[:action] ||= 'index' if options[:controller] || recall[:controller] + + if recall[:controller] && (!options.has_key?(:controller) || options[:controller] == recall[:controller]) + options[:controller] = recall.delete(:controller) + + if recall[:action] && (!options.has_key?(:action) || options[:action] == recall[:action]) + options[:action] = recall.delete(:action) + + if recall[:id] && (!options.has_key?(:id) || options[:id] == recall[:id]) + options[:id] = recall.delete(:id) + end + end + end + + options[:controller] = options[:controller].to_s if options[:controller] + + if !named_route && expire_on[:controller] && options[:controller] && options[:controller][0] != ?/ + old_parts = recall[:controller].split('/') + new_parts = options[:controller].split('/') + parts = old_parts[0..-(new_parts.length + 1)] + new_parts + options[:controller] = parts.join('/') + end + + options[:controller] = options[:controller][1..-1] if options[:controller] && options[:controller][0] == ?/ + + merged = options.merge(recall) + if options.has_key?(:action) && options[:action].nil? + options.delete(:action) + recall[:action] = 'index' + end + recall[:action] = options.delete(:action) if options[:action] == 'index' + + path = _uri(named_route, options, recall) + if path && method == :generate_extras + uri = URI(path) + extras = uri.query ? + Rack::Utils.parse_nested_query(uri.query).keys.map { |k| k.to_sym } : + [] + [uri.path, extras] + elsif path + path + else + raise ActionController::RoutingError, "No route matches #{options.inspect}" + end + rescue Rack::Mount::RoutingError + raise ActionController::RoutingError, "No route matches #{options.inspect}" + end + + def call(env) + @set.call(env) + rescue ActionController::RoutingError => e + raise e if env['action_controller.rescue_error'] == false + + method, path = env['REQUEST_METHOD'].downcase.to_sym, env['PATH_INFO'] + + # Route was not recognized. Try to find out why (maybe wrong verb). + allows = HTTP_METHODS.select { |verb| + begin + recognize_path(path, {:method => verb}, false) + rescue ActionController::RoutingError + nil + end + } + + if !HTTP_METHODS.include?(method) + raise ActionController::NotImplemented.new(*allows) + elsif !allows.empty? + raise ActionController::MethodNotAllowed.new(*allows) + else + raise e + end + end + + def recognize(request) + params = recognize_path(request.path, extract_request_environment(request)) + request.path_parameters = params.with_indifferent_access + "#{params[:controller].to_s.camelize}Controller".constantize + end + + def recognize_path(path, environment = {}, rescue_error = true) + method = (environment[:method] || "GET").to_s.upcase + + begin + env = Rack::MockRequest.env_for(path, {:method => method}) + rescue URI::InvalidURIError => e + raise ActionController::RoutingError, e.message + end + + env['action_controller.recognize'] = true + env['action_controller.rescue_error'] = rescue_error + status, headers, body = call(env) + body + end + + # Subclasses and plugins may override this method to extract further attributes + # from the request, for use by route conditions and such. + def extract_request_environment(request) + { :method => request.method } + end + + private + def _uri(named_route, params, recall) + params = URISegment.wrap_values(params) + recall = URISegment.wrap_values(recall) + + unless result = @set.generate(:path_info, named_route, params, recall) + return + end + + uri, params = result + params.each do |k, v| + if v._value + params[k] = v._value + else + params.delete(k) + end + end + + uri << "?#{Rack::Mount::Utils.build_nested_query(params)}" if uri && params.any? + uri + end + + class URISegment < Struct.new(:_value, :_escape) + EXCLUDED = [:controller] + + def self.wrap_values(hash) + hash.inject({}) { |h, (k, v)| + h[k] = new(v, !EXCLUDED.include?(k.to_sym)) + h + } + end + + extend Forwardable + def_delegators :_value, :==, :eql?, :hash + + def to_param + @to_param ||= begin + if _value.is_a?(Array) + _value.map { |v| _escaped(v) }.join('/') + else + _escaped(_value) + end + end + end + alias_method :to_s, :to_param + + private + def _escaped(value) + v = value.respond_to?(:to_param) ? value.to_param : value + _escape ? Rack::Mount::Utils.escape_uri(v) : v.to_s + end + end + + def optionalize_trailing_dynamic_segments(path, requirements, defaults) + path = (path =~ /^\//) ? path.dup : "/#{path}" + optional, segments = true, [] + + required_segments = requirements.keys + required_segments -= defaults.keys.compact + + old_segments = path.split('/') + old_segments.shift + length = old_segments.length + + old_segments.reverse.each_with_index do |segment, index| + required_segments.each do |required| + if segment =~ /#{required}/ + optional = false + break + end + end + + if optional + if segment == ":id" && segments.include?(":action") + optional = false + elsif segment == ":controller" || segment == ":action" || segment == ":id" + # Ignore + elsif !(segment =~ /^:\w+$/) && + !(segment =~ /^:\w+\(\.:format\)$/) + optional = false + elsif segment =~ /^:(\w+)$/ + if defaults.has_key?($1.to_sym) + defaults.delete($1.to_sym) + else + optional = false + end + end + end + + if optional && index < length - 1 + segments.unshift('(/', segment) + segments.push(')') + elsif optional + segments.unshift('/(', segment) + segments.push(')') + else + segments.unshift('/', segment) + end + end + + segments.join + end + end + end +end -- cgit v1.2.3