class Excon::Middleware::Mock

def self.valid_parameter_keys
  [
    :allow_unstubbed_requests,
    :captures,
    :mock
  ]
end

def request_call(datum)
  if datum[:mock]
    # convert File/Tempfile body to string before matching:
    if datum[:body].respond_to?(:read)
     if datum[:body].respond_to?(:binmode)
       datum[:body].binmode
     end
     if datum[:body].respond_to?(:rewind)
       datum[:body].rewind
     end
     datum[:body] = datum[:body].read
    elsif !datum[:body].nil? && !datum[:body].is_a?(String)
      raise Excon::Errors::InvalidStub.new("Request body should be a string or an IO object. #{datum[:body].class} provided")
    end
    if (stub = Excon.stub_for(datum))
      datum[:remote_ip] ||= '127.0.0.1'
      datum[:response] = {
        :body       => '',
        :headers    => {},
        :status     => 200,
        :remote_ip  => datum[:remote_ip]
      }
      stub_datum = case stub.last
      when Proc
        stub.last.call(datum)
      else
        stub.last
      end
      datum[:response].merge!(stub_datum.reject {|key,_| key == :headers})
      if stub_datum.has_key?(:headers)
        datum[:response][:headers].merge!(stub_datum[:headers])
      end
    elsif datum[:allow_unstubbed_requests] != true
      # if we reach here no stubs matched
      message = StringIO.new
      message.puts('no stubs matched')
      Excon::PrettyPrinter.pp(message, datum)
      raise(Excon::Errors::StubNotFound.new(message.string))
    end
  end
  @stack.request_call(datum)
end