Python TCP 服务器

Question

我写了一个简单的 Python 3 TCP 多线程服务器和 telnet 到它。在我关闭 telnet 连接之前，一切似乎都正常。当我关闭 telnet 连接 ^] 然后 control+d 退出 telnet 时，服务器重复打印 ''。

我在这里缺少一些微不足道的东西来防止这种行为吗？

import socket 
from threading import Thread 
from socketserver import ThreadingMixIn 
 
# Multithreaded Python server : TCP Server Socket Thread Pool
class ClientThread(Thread): 
 
    def __init__(self,ip,port): 
        Thread.__init__(self) 
        self.ip = ip 
        self.port = port 
        print ("[+] New server socket thread started for " + ip + ":" + str(port)) 
 
    def run(self): 
        while True : 
            data = conn.recv(2048) 
            #data = "Echo data: " + data.decode()
            print ("Server received data: ", data)
            conn.send(data)  # echo 
 
# Multithreaded Python server : TCP Server Socket Program Stub
TCP_IP = '0.0.0.0' 
TCP_PORT = 2004 
BUFFER_SIZE = 1024  # Usually 1024, but we need quick response 
 
tcpServer = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
tcpServer.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
tcpServer.bind((TCP_IP, TCP_PORT)) 
threads = [] 
 
while True: 
    tcpServer.listen(4) 
    print ("Multithreaded Python server : Waiting for connections from TCP clients...") 
    (conn, (ip,port)) = tcpServer.accept() 
    newthread = ClientThread(ip,port) 
    newthread.start() 
    threads.append(newthread) 
 
for t in threads: 
    t.join() 



Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received data:  b''
Server received da

Answer 1

您的客户端线程似乎无限循环。它会愉快地继续(尝试)从关闭的连接中读取。您应该添加一个检查，以确保从读取中收到的数据实际上包含字节。如果不是，则连接关闭。

所以，之后

data = conn.recv(2048)

添加:

if not data: break