require 'digest/md5' require 'active_support/core_ext/module/delegation' require 'active_support/core_ext/object/blank' require 'active_support/core_ext/class/attribute_accessors' module ActionDispatch # :nodoc: # Represents an HTTP response generated by a controller action. One can use # an ActionDispatch::Response object to retrieve the current state # of the response, or customize the response. An Response object can # either represent a "real" HTTP response (i.e. one that is meant to be sent # back to the web browser) or a test response (i.e. one that is generated # from integration tests). See CgiResponse and TestResponse, respectively. # # Response is mostly a Ruby on Rails framework implement detail, and # should never be used directly in controllers. Controllers should use the # methods defined in ActionController::Base instead. For example, if you want # to set the HTTP response's content MIME type, then use # ActionControllerBase#headers instead of Response#headers. # # Nevertheless, integration tests may want to inspect controller responses in # more detail, and that's when Response can be useful for application # developers. Integration test methods such as # ActionDispatch::Integration::Session#get and # ActionDispatch::Integration::Session#post return objects of type # TestResponse (which are of course also of type Response). # # For example, the following demo integration "test" prints the body of the # controller response to the console: # # class DemoControllerTest < ActionDispatch::IntegrationTest # def test_print_root_path_to_console # get('/') # puts @response.body # end # end class Response < Rack::Response attr_accessor :request, :blank attr_writer :header, :sending_file alias_method :headers=, :header= module Setup def initialize(status = 200, header = {}, body = []) @writer = lambda { |x| @body << x } @block = nil @length = 0 @status, @header = status, header self.body = body @cookie = [] @sending_file = false @blank = false if content_type = self["Content-Type"] type, charset = content_type.split(/;\s*charset=/) @content_type = Mime::Type.lookup(type) @charset = charset || "UTF-8" end yield self if block_given? end end include Setup include ActionDispatch::Http::Cache::Response def status=(status) @status = Rack::Utils.status_code(status) end # The response code of the request def response_code @status end # Returns a String to ensure compatibility with Net::HTTPResponse def code @status.to_s end def message Rack::Utils::HTTP_STATUS_CODES[@status] end alias_method :status_message, :message def respond_to?(method) if method.to_sym == :to_path @body.respond_to?(:to_path) else super end end def to_path @body.to_path end def body str = '' each { |part| str << part.to_s } str end EMPTY = " " def body=(body) @blank = true if body == EMPTY @body = body.respond_to?(:to_str) ? [body] : body end def body_parts @body end def location headers['Location'] end alias_method :redirect_url, :location def location=(url) headers['Location'] = url end # Sets the HTTP response's content MIME type. For example, in the controller # you could write this: # # response.content_type = "text/plain" # # If a character set has been defined for this response (see charset=) then # the character set information will also be included in the content type # information. attr_accessor :charset, :content_type CONTENT_TYPE = "Content-Type" cattr_accessor(:default_charset) { "utf-8" } def to_a assign_default_content_type_and_charset! handle_conditional_get! self["Set-Cookie"] = @cookie.join("\n") unless @cookie.blank? self["ETag"] = @_etag if @_etag super end alias prepare! to_a def each(&callback) if @body.respond_to?(:call) @writer = lambda { |x| callback.call(x) } @body.call(self, self) else @body.each { |part| callback.call(part.to_s) } end @writer = callback @block.call(self) if @block end def write(str) str = str.to_s @writer.call str str end # Returns the response cookies, converted to a Hash of (name => value) pairs # # assert_equal 'AuthorOfNewPage', r.cookies['author'] def cookies cookies = {} if header = @cookie header = header.split("\n") if header.respond_to?(:to_str) header.each do |cookie| if pair = cookie.split(';').first key, value = pair.split("=").map { |v| Rack::Utils.unescape(v) } cookies[key] = value end end end cookies end def set_cookie(key, value) case value when Hash domain = "; domain=" + value[:domain] if value[:domain] path = "; path=" + value[:path] if value[:path] # According to RFC 2109, we need dashes here. # N.B.: cgi.rb uses spaces... expires = "; expires=" + value[:expires].clone.gmtime. strftime("%a, %d-%b-%Y %H:%M:%S GMT") if value[:expires] secure = "; secure" if value[:secure] httponly = "; HttpOnly" if value[:httponly] value = value[:value] end value = [value] unless Array === value cookie = Rack::Utils.escape(key) + "=" + value.map { |v| Rack::Utils.escape v }.join("&") + "#{domain}#{path}#{expires}#{secure}#{httponly}" @cookie << cookie end def delete_cookie(key, value={}) @cookie.reject! { |cookie| cookie =~ /\A#{Rack::Utils.escape(key)}=/ } set_cookie(key, {:value => '', :path => nil, :domain => nil, :expires => Time.at(0) }.merge(value)) end private def assign_default_content_type_and_charset! return if headers[CONTENT_TYPE].present? @content_type ||= Mime::HTML @charset ||= self.class.default_charset type = @content_type.to_s.dup type << "; charset=#{@charset}" unless @sending_file headers[CONTENT_TYPE] = type end end end