parse_formatted_parameters

# File actionpack/lib/action_controller/params_parser.rb, line 19
      def parse_formatted_parameters(env)
        request = Request.new(env)

        return false if request.content_length.zero?

        mime_type = content_type_from_legacy_post_data_format_header(env) || request.content_type
        strategy = ActionController::Base.param_parsers[mime_type]

        return false unless strategy

        case strategy
          when Proc
            strategy.call(request.raw_post)
          when :xml_simple, :xml_node
            body = request.raw_post
            body.blank? ? {} : Hash.from_xml(body).with_indifferent_access
          when :yaml
            YAML.load(request.raw_post)
          when :json
            body = request.raw_post
            if body.blank?
              {}
            else
              data = ActiveSupport::JSON.decode(body)
              data = {:_json => data} unless data.is_a?(Hash)
              data.with_indifferent_access
            end
          else
            false
        end
      rescue Exception => e # YAML, XML or Ruby code block errors
        logger.debug "Error occurred while parsing request parameters.\nContents:\n\n#{request.raw_post}"

        raise
          { "body" => request.raw_post,
            "content_type" => request.content_type,
            "content_length" => request.content_length,
            "exception" => "#{e.message} (#{e.class})",
            "backtrace" => e.backtrace }
      end