我在写一个聊天程序。我的每个客户都在一个单独的线程中向服务器发出一个开放的获取请求（还有一个线程用于发布自己的信息）。我不希望有大量的开销。也就是说，客户端不会频繁地发送获取请求以查看是否有任何未见的消息。相反，他们总是正好有一个开放的获取请求来获取新的消息，一旦服务器响应了他们新的未见消息，他们就立即向服务器发送另一个获取请求来保持更新，如此反复。 所以在客户端，我有这样的东西。
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，我有这样的东西。
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()
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()
And the logic behind this is that the servers want to do the long-polling, that is, it keeps GET/receive requests open in another busy-waiting thread. When any client sends a message to the server via POST/message it just adds this new message to other clients unseenMessages 和 so once their thread is running, they come out of the while True: loop, 和 the server gives them the new messages. In other words, I want to hold client's GET/receive open 和 not respond it as long as I want.
This process might take so long time. Maybe the chatroom is idle 和 there is no messages for a long time.
Right now the problem I have is that as soon as my client sends its first GET/receive message, it gets this error, even though I have set the timeout value in GET/receive request to be so much.
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'))
===========================================================================
奇怪的是，每当我把GET/receive模块编辑成这样。
def do_GET(self):
while True:
everything works fine.
But when I do :
def do_GET(self):
t=threading.Thread(target=long_Poll,args=(self))
t.start()
def long_Poll(con):
client =None
while True:
它给客户带来了同样的错误!
我的意思是，问题是由于我把自己的对象传递给另一个函数来响应？也许它中断了连接？我记得在Java套接字编程中也有同样的问题，当我想用套接字在两个函数中通信时，有时会遇到一些bug？然而，在这里我只想在长轮询的函数中进行通信，而不是在其他地方。
=======================================
update:
I also put my server 和 client code here. For brevity, I post the paste.ubuntu links here.
Client:
https://paste.ubuntu.com/p/qJmRjYy4Y9/
Server: