加上了 self.write_error(404, None) 和 self.send()，依然empty response

有报错

2019-10-18 14:34:43,829 - base_http_handler.py[line:38] - ERROR:not enough values to unpack (expected 3, got 0)

Traceback (most recent call last):

  File "C:\pythonlearning\HTTPLearning\httpserver\handler\base_http_handler.py", line 24, in handle

    if not self.parse_request():

  File "C:\pythonlearning\HTTPLearning\httpserver\handler\base_http_handler.py", line 64, in parse_request

    self.method, self.path, self.version = words

ValueError: not enough values to unpack (expected 3, got 0)