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python - Python http requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

问题描述

我正在写一个聊天程序。我的每个客户在一个单独的线程（以及另一个用于发布他们自己的消息的线程）中都有一个对服务器的开放获取请求。我不想有很多开销。也就是说，客户端不会经常发送 get 请求来查看是否有任何未见过的消息。相反，它们总是有一个打开的获取请求来获取新消息，并且一旦服务器用新的看不见的消息响应它们，它们就会立即向服务器发送另一个获取请求以保持更新等等。所以在客户端，我有这样的事情：

def coms():
   headers = {'data': myAut.strip()}
   resp = requests.get("http://localhost:8081/receive", headers=headers,timeout=1000000)
   print(resp.text)
   t = threading.Thread(target=coms, args=())
   t.start()

在服务器端，我有这样的事情：

def do_GET(self):

    if self.path == '/receive':
        auth=self.headers['data']
    
    #Using auth, find who has sent this message
        u=None
        for i in range(len(users)):
            print(users[i].aut,auth)
            if users[i].aut==auth:
                u=users[i]
                break


        t=threading.Thread(target=long_Poll,args=(u,self))
        t.start()

和

def long_Poll(client,con):

   while True:

       if len(client.unreadMessages) != 0:
           print("IM GONNA RESPOND")
           con.end_headers()
           con.wfile.write(bytes(client.unreadMessages, "utf8"))
           client.unreadMessages=[]
           break
   con.send_response(200)
   con.end_headers()

这背后的逻辑是服务器想要进行长轮询，也就是说，它GET/receive在另一个忙等待的线程中保持请求打开。当任何客户端通过它向服务器发送消息时POST/message，只需将此新消息添加到其他客户端unseenMessages，因此一旦它们的线程运行，它们就会退出while True:循环，服务器会向它们提供新消息。换句话说，我想保持客户的GET/receive开放状态，并且只要我愿意就不会响应它。这个过程可能需要很长时间。可能聊天室闲置，很长时间没有消息。现在我遇到的问题是，一旦我的客户端发送了第一GET/receive条消息，它就会收到此错误，即使我已将GET/receive请求中的超时值设置得如此之多。

C:\Users\erfan\Desktop\web\client\venv\Scripts\python.exe C:\Users\erfan\Desktop\web\client\Client.py
Hossein
Welcome to chatroom Hossein ! Have a nice time !
Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 677, in urlopen
    chunked=chunked,
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 426, in _make_request
    six.raise_from(e, None)
  File "<string>", line 3, in raise_from
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 421, in _make_request
    httplib_response = conn.getresponse()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 1321, in getresponse
    response.begin()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 296, in begin
    version, status, reason = self._read_status()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 265, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\adapters.py", line 449, in send
    timeout=timeout
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 727, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\util\retry.py", line 410, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\packages\six.py", line 734, in reraise
    raise value.with_traceback(tb)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 677, in urlopen
    chunked=chunked,
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 426, in _make_request
    six.raise_from(e, None)
  File "<string>", line 3, in raise_from
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\urllib3\connectionpool.py", line 421, in _make_request
    httplib_response = conn.getresponse()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 1321, in getresponse
    response.begin()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 296, in begin
    version, status, reason = self._read_status()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\http\client.py", line 265, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
urllib3.exceptions.ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\threading.py", line 917, in _bootstrap_inner
    self.run()
  File "C:\Users\erfan\AppData\Local\Programs\Python\Python37\lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\erfan\Desktop\web\client\Client.py", line 13, in coms
    resp = requests.get("http://localhost:8081/receive", headers=headers,timeout=1000000)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\sessions.py", line 530, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\sessions.py", line 643, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\erfan\Desktop\web\client\venv\lib\site-packages\requests\adapters.py", line 498, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

==================================================== ========================== 更新：

奇怪的是，每当我将GET/receive模块编辑为此：

 def do_GET(self):
      while True:
         pass

一切正常。但是当我这样做时：

def do_GET(self):
   t=threading.Thread(target=long_Poll,args=(self))
   t.start()

def long_Poll(con):

  client =None
  while True:
    pass

它给客户同样的错误！

我的意思是问题是因为我将 self 对象传递给另一个函数来响应？也许它会中断连接？我记得在 Java 套接字编程中遇到过同样的问题，当我想使用套接字在两个函数中进行通信时，有时会遇到一些错误？但是，在这里我只想在长轮询函数中进行通信，而不是在其他任何地方。

========================================

更新：我也把我的服务器和客户端代码放在这里。为简洁起见，我在此处发布 paste.ubuntu 链接。

客户：

https://paste.ubuntu.com/p/qJmRjYy4Y9/

服务器：

https://paste.ubuntu.com/p/rVyHPs4Rjz/

客户第一次打字时，他输入他的名字，然后他开始发送GET/receive请求。然后客户可以通过发送POST/message请求将他的消息发送给其他人。每当用户向服务器发送消息时，服务器都会（通过他的身份验证）找到他并更新所有其他客户端unseenMessages，这样只要他们的长轮询线程继续，他们就会收到新消息，他们的客户端也会GET/receive立即发送另一条消息.

标签： pythonhttppython-requestslong-polling

解决方案

我找到了答案。我试图拥有一个使用单线程语法的多线程服务器！我按照这个线程在 python中拥有一个多线程 HTTP 服务器 多线程 Web 服务器

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