TCP多进程并发模型_process target daemon=true-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44497507/article/details/126750834

本文探讨了两种Python服务端实现方式：FORK模型和Process模型。FORK模型利用os.fork创建子进程来处理客户端连接，而Process模型则采用multiprocessing模块的Process类启动新进程。两种模型都在监听8080端口，接收到客户端请求后，发送'OK'响应。客户端通过输入昵称和消息进行交互。文章侧重于并发处理客户端连接的实现细节和差异。

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服务端：FORK模型

import os
from socket import *
import signal

server_addr = ("0.0.0.0", 8080)
s = socket()
s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
s.bind(server_addr)
s.listen(5)
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
print("waiting for connecting....")


def handle(c):
    while True:
        try:
            data = c.recv(1024)
        except Exception as e:
            print(e)
            break
        if not data:
            break
        print(data.decode())
        n = c.send(b"OK")
        print("send %d byte" % n)
    c.close()


while True:
    try:
        c, addr = s.accept()
        print("Connect from:", addr)
    except KeyboardInterrupt:
        print("server exit")
        os._exit(0)
    except Exception as e:
        print(e)
        continue

    pid = os.fork()
    if pid == 0:
        s.close()
        handle(c)
        os._exit(0)
    else:
        c.close()

服务端Process模型

import os
from socket import *
import signal
from multiprocessing import Process

server_addr = ("0.0.0.0", 8080)
s = socket()
s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
s.bind(server_addr)
s.listen(5)
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
print("waiting for connecting....")


def handle(c):
    while True:
        try:
            data = c.recv(1024)
        except Exception as e:
            print(e)
            break
        if not data:
            break
        print(data.decode())
        n = c.send(b"OK")
        print("send %d byte" % n)
    c.close()


while True:
    try:
        c, addr = s.accept()
        print("Connect from:", addr)
    except KeyboardInterrupt:
        print("server exit")
        os._exit(0)
    except Exception as e:
        print(e)
        continue

    p = Process(target=handle, args=(c,), daemon=True)
    p.start()

客户端：

from socket import *

server_addr = ("192.168.27.189", 8080)
sock = socket()
print("waiting for connecting....")
sock.connect(server_addr)
print("connected...")
while True:
    nick = input("nick:")
    if nick != "":
        break

while True:
    msg = input("Msg>>")
    if not msg:
        break
    msg = "%s:%s" % (nick, msg)
    sock.send(msg.encode())
    data = sock.recv(1024)
    if not data:
        break
    print(data)
sock.close()