require 'action_dispatch/http/request' module ActionDispatch class ParamsParser DEFAULT_PARSERS = { Mime::XML => :xml_simple, Mime::JSON => :json } def initialize(app, parsers = {}) @app, @parsers = app, DEFAULT_PARSERS.merge(parsers) end def call(env) if params = parse_formatted_parameters(env) env["action_dispatch.request.request_parameters"] = params end @app.call(env) end private 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 = @parsers[mime_type] return false unless strategy case strategy when Proc strategy.call(request.raw_post) when :xml_simple, :xml_node request.body.size == 0 ? {} : Hash.from_xml(request.raw_post).with_indifferent_access when :yaml YAML.load(request.raw_post) when :json if request.body.size == 0 {} else data = ActiveSupport::JSON.decode(request.raw_post) 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 def content_type_from_legacy_post_data_format_header(env) if x_post_format = env['HTTP_X_POST_DATA_FORMAT'] case x_post_format.to_s.downcase when 'yaml' then return Mime::YAML when 'xml' then return Mime::XML end end nil end def logger defined?(Rails.logger) ? Rails.logger : Logger.new($stderr) end end end