module ActionDispatch class RequestEncoder # :nodoc: class IdentityEncoder def content_type; end def accept_header; end def encode_params(params); params; end def response_parser; -> body { body }; end end @encoders = { identity: IdentityEncoder.new } attr_reader :response_parser def initialize(mime_name, param_encoder, response_parser) @mime = Mime[mime_name] unless @mime raise ArgumentError, "Can't register a request encoder for " \ "unregistered MIME Type: #{mime_name}. See `Mime::Type.register`." end @response_parser = response_parser || -> body { body } @param_encoder = param_encoder || :"to_#{@mime.symbol}".to_proc end def content_type @mime.to_s end def accept_header @mime.to_s end def encode_params(params) @param_encoder.call(params) end def self.parser(content_type) mime = Mime::Type.lookup(content_type) encoder(mime ? mime.ref : nil).response_parser end def self.encoder(name) @encoders[name] || @encoders[:identity] end def self.register_encoder(mime_name, param_encoder: nil, response_parser: nil) @encoders[mime_name] = new(mime_name, param_encoder, response_parser) end register_encoder :json, response_parser: -> body { JSON.parse(body) } end end