Introduce `render :body` for render raw content

This is an option for sending a raw content back to browser. Note that
this rendering option will unset the default content type and does not
include "Content-Type" header back in the response.

You should only use this option if you are expecting the "Content-Type"
header to not be set. More information on "Content-Type" header can be
found on RFC 2616, section 7.2.1.

Please see #12374 for more detail.

4 files changed, 8 insertions, 4 deletions

diff --git a/actionview/lib/action_view/helpers/rendering_helper.rb b/actionview/lib/action_view/helpers/rendering_helper.rb
index 458086de96..77d63b7f86 100644
--- a/actionview/lib/action_view/helpers/rendering_helper.rb
+++ b/actionview/lib/action_view/helpers/rendering_helper.rb
@@ -12,6 +12,8 @@ module ActionView
       # * <tt>:file</tt> - Renders an explicit template file (this used to be the old default), add :locals to pass in those.
       # * <tt>:inline</tt> - Renders an inline template similar to how it's done in the controller.
       # * <tt>:text</tt> - Renders the text passed in out.
+      # * <tt>:body</tt> - Renders the text passed in, and does not set content
+      # type in the response.
       #
       # If no options hash is passed or :update specified, the default is to render a partial and use the second parameter
       # as the locals hash.
diff --git a/actionview/lib/action_view/layouts.rb b/actionview/lib/action_view/layouts.rb
index ffa67649da..b67b749af5 100644
--- a/actionview/lib/action_view/layouts.rb
+++ b/actionview/lib/action_view/layouts.rb
@@ -420,7 +420,7 @@ module ActionView
     end
 
     def _include_layout?(options)
-      (options.keys & [:text, :inline, :partial]).empty? || options.key?(:layout)
+      (options.keys & [:body, :text, :inline, :partial]).empty? || options.key?(:layout)
     end
   end
 end
diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb
index 668831dff3..8f24f8dab0 100644
--- a/actionview/lib/action_view/renderer/template_renderer.rb
+++ b/actionview/lib/action_view/renderer/template_renderer.rb
@@ -21,7 +21,9 @@ module ActionView
     def determine_template(options) #:nodoc:
       keys = options.fetch(:locals, {}).keys
 
-      if options.key?(:text)
+      if options.key?(:body)
+        Template::Text.new(options[:body])
+      elsif options.key?(:text)
         Template::Text.new(options[:text], formats.first)
       elsif options.key?(:file)
         with_fallbacks { find_template(options[:file], nil, false, keys, @details) }
@@ -35,7 +37,7 @@ module ActionView
           find_template(options[:template], options[:prefixes], false, keys, @details)
         end
       else
-        raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file or :text option."
+        raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file, :text or :body option."
       end
     end
 
diff --git a/actionview/lib/action_view/rendering.rb b/actionview/lib/action_view/rendering.rb
index 7c17220d14..017302d40f 100644
--- a/actionview/lib/action_view/rendering.rb
+++ b/actionview/lib/action_view/rendering.rb
@@ -100,7 +100,7 @@ module ActionView
       end
 
       # Assign the rendered format to lookup context.
-      def _process_format(format) #:nodoc:
+      def _process_format(format, options = {}) #:nodoc:
         super
         lookup_context.formats = [format.to_sym]
         lookup_context.rendered_format = lookup_context.formats.first