module ActionDispatch module Http module Parameters extend ActiveSupport::Concern PARAMETERS_KEY = "action_dispatch.request.path_parameters" DEFAULT_PARSERS = { Mime[:json].symbol => -> (raw_post) { data = ActiveSupport::JSON.decode(raw_post) data.is_a?(Hash) ? data : { _json: data } } } # Raised when raw data from the request cannot be parsed by the parser # defined for request's content mime type. class ParseError < StandardError def initialize super($!.message) end end included do class << self # Returns the parameter parsers. attr_reader :parameter_parsers end self.parameter_parsers = DEFAULT_PARSERS end module ClassMethods # Configure the parameter parser for a given mime type. # # It accepts a hash where the key is the symbol of the mime type # and the value is a proc. # # original_parsers = ActionDispatch::Request.parameter_parsers # xml_parser = -> (raw_post) { Hash.from_xml(raw_post) || {} } # new_parsers = original_parsers.merge(xml: xml_parser) # ActionDispatch::Request.parameter_parsers = new_parsers def parameter_parsers=(parsers) @parameter_parsers = parsers.transform_keys { |key| key.respond_to?(:symbol) ? key.symbol : key } end end # Returns both GET and POST \parameters in a single hash. def parameters params = get_header("action_dispatch.request.parameters") return params if params params = begin request_parameters.merge(query_parameters) rescue EOFError query_parameters.dup end params.merge!(path_parameters) params = set_binary_encoding(params) set_header("action_dispatch.request.parameters", params) params end alias :params :parameters def path_parameters=(parameters) #:nodoc: delete_header("action_dispatch.request.parameters") # If any of the path parameters has an invalid encoding then # raise since it's likely to trigger errors further on. Request::Utils.check_param_encoding(parameters) set_header PARAMETERS_KEY, parameters rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e raise ActionController::BadRequest.new("Invalid path parameters: #{e.message}") end # Returns a hash with the \parameters used to form the \path of the request. # Returned hash keys are strings: # # {'action' => 'my_action', 'controller' => 'my_controller'} def path_parameters get_header(PARAMETERS_KEY) || set_header(PARAMETERS_KEY, {}) end private def set_binary_encoding(params) action = params[:action] if controller_class.binary_params_for?(action) ActionDispatch::Request::Utils.each_param_value(params) do |param| param.force_encoding ::Encoding::ASCII_8BIT end end params end def parse_formatted_parameters(parsers) return yield if content_length.zero? || content_mime_type.nil? strategy = parsers.fetch(content_mime_type.symbol) { return yield } begin strategy.call(raw_post) rescue # JSON or Ruby code block errors my_logger = logger || ActiveSupport::Logger.new($stderr) my_logger.debug "Error occurred while parsing request parameters.\nContents:\n\n#{raw_post}" raise ParseError end end def params_parsers ActionDispatch::Request.parameter_parsers end end end module ParamsParser ParseError = ActiveSupport::Deprecation::DeprecatedConstantProxy.new("ActionDispatch::ParamsParser::ParseError", "ActionDispatch::Http::Parameters::ParseError") end end