module ActionController module Rendering extend ActiveSupport::Concern RENDER_FORMATS_IN_PRIORITY = [:body, :text, :plain, :html] module ClassMethods # Documentation at ActionController::Renderer#render delegate :render, to: :renderer # Returns a renderer class (inherited from ActionController::Renderer) # for the controller. def renderer @renderer ||= Renderer.for(self) end end # Before processing, set the request formats in current controller formats. def process_action(*) #:nodoc: self.formats = request.formats.map(&:ref).compact super end # Check for double render errors and set the content_type after rendering. def render(*args) #:nodoc: raise ::AbstractController::DoubleRenderError if self.response_body super end # Overwrite render_to_string because body can now be set to a rack body. def render_to_string(*) result = super if result.respond_to?(:each) string = "" result.each { |r| string << r } string else result end end def render_to_body(options = {}) super || _render_in_priorities(options) || ' ' end private def _render_in_priorities(options) RENDER_FORMATS_IN_PRIORITY.each do |format| return options[format] if options.key?(format) end nil end def _process_format(format, options = {}) super if options[:plain] self.content_type = Mime::TEXT else self.content_type ||= format.to_s end end # Normalize arguments by catching blocks and setting them on :update. def _normalize_args(action=nil, options={}, &blk) #:nodoc: options = super options[:update] = blk if block_given? options end # Normalize both text and status options. def _normalize_options(options) #:nodoc: _normalize_text(options) if options[:html] options[:html] = ERB::Util.html_escape(options[:html]) end if options.delete(:nothing) ActiveSupport::Deprecation.warn("`:nothing` option is deprecated and will be removed in Rails 5.1. Use `head` method to respond with empty response body.") options[:body] = nil end if options[:status] options[:status] = Rack::Utils.status_code(options[:status]) end super end def _normalize_text(options) RENDER_FORMATS_IN_PRIORITY.each do |format| if options.key?(format) && options[format].respond_to?(:to_text) options[format] = options[format].to_text end end end # Process controller specific options, as status, content-type and location. def _process_options(options) #:nodoc: status, content_type, location = options.values_at(:status, :content_type, :location) self.status = status if status self.content_type = content_type if content_type self.headers["Location"] = url_for(location) if location super end end end