如何处理与 python 套接字的断开连接？ （连接重置错误）

Posted 2023-04-18

【中文标题】如何处理与 python 套接字的断开连接？ （连接重置错误）

【英文标题】：How do I handle a disconnect with python sockets? (ConnectionResetError)

【发布时间】：2021-03-11 10:35:07

【问题描述】：

我正在使用 python 套接字制作一个简单的服务器和客户端，我想知道如何处理断开连接。每当我的一个客户端断开连接时，它会给出一个ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host 并且服务器停止运行。这是有道理的，但是我该如何处理这样的断开连接呢？这是我的服务器代码：（我知道它是我的第一个套接字项目）

import socket
import threading


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #Connection oriented, IPV4

s.bind((socket.gethostname(), 1234))#Ip address information, port
s.listen(5)

connections = [] #Connection added to this list every time a client connects

def accptconnection():
    while True:
        clientsocket, address = s.accept()
        connections.append(clientsocket) #adds the clients information to the connections array
        threading.Thread(target=recvmsg, args=(clientsocket, address,)).start()

def recvmsg(clientsocket, address):
    while True:
        print(f"Connection from address has been established.")
        msg = clientsocket.recv(1024)
        if len(msg.decode('utf-8')) > 0:
            print(msg.decode("utf-8"))
        for connection in connections: #iterates through the connections array and sends message to each one
            msgbreak = msg
            connection.send(bytes(str(msgbreak.decode("utf-8")), "utf-8"))


accptconnection()

如果您能提供帮助，请提前致谢！

【参考方案1】：

这应该可以防止服务器关闭，并清理您遇到连接错误的客户端：

import socket
import threading


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #Connection oriented, IPV4

s.bind((socket.gethostname(), 1234))#Ip address information, port
s.listen(5)

connections = [] #Connection added to this list every time a client connects

def accptconnection():
    while True:
        clientsocket, address = s.accept()
        connections.append(clientsocket) #adds the clients information to the connections array
        threading.Thread(target=recvmsg, args=(clientsocket, address,)).start()

def recvmsg(clientsocket, address):
    print(f"Connection from address has been established.")
    while True:
        try:
            msg = clientsocket.recv(1024)
        except ConnectionError:
            print(f"Connection from address has been lost.")
            if clientsocket in connections:
                connections.remove(clientsocket)
            return
        if len(msg.decode('utf-8')) > 0:
            print(msg.decode("utf-8"))
        for connection in connections: #iterates through the connections array and sends message to each one
            msgbreak = msg
            try:
                connection.send(bytes(str(msgbreak.decode("utf-8")), "utf-8"))
            except ConnectionError:
                 print(f"Unable to reach client with socket connection")
                 if connection in connections:
                     connections.remove(connection)

accptconnection()

【讨论】：

谢谢！这很有帮助，我完全理解。