rails/actionpack/lib/action_controller/deprecated_request_methods.rb

module ActionController
  class AbstractRequest
    # Determine whether the body of a HTTP call is URL-encoded (default)
    # or matches one of the registered param_parsers. 
    #
    # For backward compatibility, the post format is extracted from the
    # X-Post-Data-Format HTTP header if present.
    def post_format
      case content_type
      when Mime::XML
        :xml
      when Mime::YAML
        :yaml
      else
        :url_encoded
      end
    end

    # Is this a POST request formatted as XML or YAML?
    def formatted_post?
      post? && (post_format == :yaml || post_format == :xml)
    end

    # Is this a POST request formatted as XML?
    def xml_post?
      post? && post_format == :xml
    end

    # Is this a POST request formatted as YAML?
    def yaml_post?
      post? && post_format == :yaml
    end
  end
end