如何在Python中制作一个能记住客户端的简单多线程套接字服务器

Question

如何制作一个简单的Python回显服务器，该服务器可以记住客户端并且不为每个请求创建新的套接字？必须能够支持并发访问。我希望能够连接一次并使用此客户端或类似客户端连续发送和接收数据：

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = raw_input("Server hostname or ip? ")
port = input("Server port? ")
sock.connect((host,port))
while True:
    data = raw_input("message: ")
    sock.send(data)
    print "response: ", sock.recv(1024)

即使用上面的客户端，服务器在端口50000上运行，我希望能够做到这一点：

me@mine:~$ client.py
Server hostname or ip? localhost
Server Port? 50000
message: testa
response: testa
message: testb
response: testb
message: testc
response: testc

Answer 1

您可以为每个客户端使用一个线程以避免阻塞，client.recv()然后仅将主线程用于侦听新客户端。当一个连接时，主线程创建一个新线程，该新线程仅侦听新客户端，并在60秒钟不讲话时结束。

import socket
import threading

class ThreadedServer(object):
    def __init__(self, host, port):
        self.host = host
        self.port = port
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.sock.bind((self.host, self.port))

    def listen(self):
        self.sock.listen(5)
        while True:
            client, address = self.sock.accept()
            client.settimeout(60)
            threading.Thread(target = self.listenToClient,args = (client,address)).start()

    def listenToClient(self, client, address):
        size = 1024
        while True:
            try:
                data = client.recv(size)
                if data:
                    # Set the response to echo back the recieved data 
                    response = data
                    client.send(response)
                else:
                    raise error('Client disconnected')
            except:
                client.close()
                return False

if __name__ == "__main__":
    while True:
        port_num = input("Port? ")
        try:
            port_num = int(port_num)
            break
        except ValueError:
            pass

    ThreadedServer('',port_num).listen()

客户端闲置60秒后超时，必须重新连接。看到client.settimeout(60)函数中的行ThreadedServer.listen()