class ActionDispatch::Integration::Session::RequestEncoder

def self.encoder(name)
  @encoders[name] || WWWFormEncoder
end

def self.parser(content_type)
  mime = Mime::Type.lookup(content_type)
  encoder(mime ? mime.ref : nil).response_parser
end

def self.register_encoder(mime_name, param_encoder: nil, response_parser: nil)
  @encoders[mime_name] = new(mime_name, param_encoder, response_parser)
end

def append_format_to(path)
  path << @path_format unless @url_encoded_form
  path
end

def content_type
  @mime.to_s
end

def encode_params(params)
  @param_encoder.call(params)
end

def initialize(mime_name, param_encoder, response_parser, url_encoded_form = false)
  @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
  @url_encoded_form = url_encoded_form
  @path_format      = ".#{@mime.symbol}" unless @url_encoded_form
  @response_parser  = response_parser || -> body { body }
  @param_encoder    = param_encoder   || :"to_#{@mime.symbol}".to_proc
end