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require 'active_support/deprecation'
require 'active_support/core_ext/string/filters'
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 instance (inherited from ActionController::Renderer)
# for the controller.
attr_reader :renderer
def setup_renderer! # :nodoc:
@renderer = Renderer.for(self)
end
def inherited(klass)
klass.setup_renderer!
super
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 _set_html_content_type
self.content_type = Mime::Type[:HTML].to_s
end
def _set_rendered_content_type(format)
unless response.content_type
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[:text]
ActiveSupport::Deprecation.warn <<-WARNING.squish
`render :text` is deprecated because it does not actually render a
`text/plain` response. Switch to `render plain: 'plain text'` to
render as `text/plain`, `render html: '<strong>HTML</strong>'` to
render as `text/html`, or `render body: 'raw'` to match the deprecated
behavior and render with the default Content-Type, which is
`text/plain`.
WARNING
end
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
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