class HTTParty::Request

def perform(&block)
  validate
  setup_raw_request
  chunked_body = nil
  current_http = http
  begin
    self.last_response = current_http.request(@raw_request) do |http_response|
      if block
        chunks = []
        http_response.read_body do |fragment|
          encoded_fragment = encode_text(fragment, http_response['content-type'])
          chunks << encoded_fragment if !options[:stream_body]
          block.call ResponseFragment.new(encoded_fragment, http_response, current_http)
        end
        chunked_body = chunks.join
      end
    end
    handle_host_redirection if response_redirects?
    result = handle_unauthorized
    result ||= handle_response(chunked_body, &block)
    result
  rescue *COMMON_NETWORK_ERRORS => e
    raise options[:foul] ? HTTParty::NetworkError.new("#{e.class}: #{e.message}") : e
  end
end