尝试发送PUT请求时发生ConnectionResetError

Question

我试图使用PUT REST Api上传一个文件，但是我得到了一个ConnectionResetError。我尝试过将urllib.request.Request()与urllib.request.urlopen()以及{}一起使用。在

当我使用cURL时，它可以正常工作：

$ curl -X PUT http://localhost:5000/root.bar/test/1.0/jre -H 'Content-Type: application/java-archive' -H 'Content-Name: bfg-1.12.16.jar' -H 'Authorization: Basic cm9vdDphbHBpbmU=' -d @C:/Users/niklas/Desktop/bfg-1.12.16.jar

代码的重要部分：

^{pr2}$

我错过了什么卷曲在做什么？

（PS：我还尝试过通过传递data=args.file.read()来发送bytes而不是使用requests.put()来发送类似文件的对象）

---

完整的回溯：

$ python -m fatartifacts.web.cli http://localhost:5000 root.bar:test:1.0:jre ~/Desktop/bfg-1.12.16.jar  -m application/java-archive -u root:alpine
Traceback (most recent call last):
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
    chunked=chunked)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\connectionpool.py", line 357, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1239, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1285, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1234, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1065, in _send_output
    self.send(chunk)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 986, in send
    self.sock.sendall(data)
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\adapters.py", line 440, in send
    timeout=timeout
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\connectionpool.py", line 639, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\util\retry.py", line 357, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\packages\six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
    chunked=chunked)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\urllib3\connectionpool.py", line 357, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1239, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1285, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1234, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 1065, in _send_output
    self.send(chunk)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\http\client.py", line 986, in send
    self.sock.sendall(data)
urllib3.exceptions.ProtocolError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\niklas\appdata\local\programs\python\python36\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\niklas\repos\fatartifacts\fatartifacts\web\cli.py", line 106, in <module>
    main_and_exit()
  File "C:\Users\niklas\repos\fatartifacts\fatartifacts\web\cli.py", line 102, in main_and_exit
    sys.exit(main())
  File "C:\Users\niklas\repos\fatartifacts\fatartifacts\web\cli.py", line 97, in main
    response = requests.put(url, data=args.file, headers=headers)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\api.py", line 126, in put
    return request('put', url, data=data, **kwargs)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\sessions.py", line 508, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\sessions.py", line 618, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\niklas\.virtualenvs\fatartifacts-LoWBpE4v\lib\site-packages\requests\adapters.py", line 490, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

---

restapi是用flask和flask-restful实现的。这种例外似乎发生在

• 使用Python发出请求（urllib.request，requests）
• API使用flask.abort()返回非200状态代码

Answer 1

问题是flaskrestapi没有使用请求发送的所有内容。在读取flask.request.stream之前，Flask应用程序调用了abort(403)。在

由于我不想在请求被拒绝时读取所有数据，所以我发现调用request.environ['wsgi.input'].close()关闭流而不首先读取其内容，这避免了客户端上的ConnectionResetError。在

def close_input_stream(func):
  @functools.wraps(func)
  def wrapper(*a, **kw):
    try:
      return func(*a, **kw)
    finally:
      fp = request.environ.get('wsgi.input')
      if fp:
        fp.close()
  return wrapper