在 python 分叉服务器

forking server in python

我已经使用 python 3 编写了一个可以接受很多客户端的分叉服务器(我没有设置客户端数量的限制)。每个客户端将按照与服务器的连接顺序在服务器中分配一个索引值。例如,第一个客户端将被称为 CLIENT 1,然后第二个客户端将被称为 CLIENT 2,依此类推。

但问题是该索引未正确分配给客户端。请帮我解决这个问题。我正在发送服务器和客户端的 python 代码以及示例输出

对于服务器代码是

import os, socket

host="127.0.0.1"
port=7000
s=socket.socket()
s.bind((host, port))
s.listen(10)

def handle_client(s, addr, i):
    while True:
        data=s.recv(1024)
        decoded_data=data.decode("utf-8")
        if not decoded_data:
                print("\nconnection with client " + str(i) + " broken\n")
                break
        print("  CLIENT " + str(i) + " -> " + decoded_data)

def server():
    i=1
    while i<=10:
        c, addr=s.accept()
        child_pid=os.fork()
        if child_pid==0:
                print("\nconnection successful with client " + str(i) + str(addr) + "\n")
                handle_client(c, addr, i)
        else:
                i+=1

server()

客户端代码为

import socket

def client():
    host="127.0.0.1"
    port=7000
    s=socket.socket()
    s.connect((host, port))
    msg=str(input("\n -> "))
    encoded_msg=bytes(msg, "utf-8")
    while msg!='q':
            s.send(encoded_msg)
            msg=str(input("\n -> "))
            encoded_msg=bytes(msg, "utf-8")

client()

现在我打开 2 个终端,运行 服务器在一个终端中,在另一个终端中 运行 个客户端

我运行客户所在的终端是这样的

debesh@laptop:~/Documents/programs/python/network$ python3 forking_chat_client.py

 -> hii

 -> q
debesh@laptop:~/Documents/programs/python/network$ python3 forking_chat_client.py

 -> hello

 -> q
debesh@laptop:~/Documents/programs/python/network$ python3 forking_chat_client.py

 -> hii how are you???

 -> q
debesh@laptop:~/Documents/programs/python/network$ python3 forking_chat_client.py

 -> good day

 -> q
debesh@laptop:~/Documents/programs/python/network$ 

服务器所在的终端运行ning是这样的

debesh@laptop:~/Documents/programs/python/network$ python3 forking_chat_server.py

connection successful with client 1('127.0.0.1', 50362)

  CLIENT 1 -> hii

connection with client 1 broken


connection successful with client 2('127.0.0.1', 50363)

  CLIENT 2 -> hello

connection with client 2 broken


connection successful with client 1('127.0.0.1', 50364)

  CLIENT 1 -> hii how are you???

connection with client 1 broken


connection successful with client 3('127.0.0.1', 50365)

  CLIENT 3 -> good day

connection with client 3 broken

正如您在服务器终端中看到的那样,索引 1 分配给了两个客户端 - 第一个和第三个。这是怎么发生的?我的代码有什么问题?请帮助我

问题是您的分叉进程在处理客户端后保持 运行 服务器循环。尝试在调用 handle_client(c, addr, i):

后添加 break
def server():
    i=1
    while i<=10:
        c, addr=s.accept()
        child_pid=os.fork()
        if child_pid==0:
                print("\nconnection successful with client " + str(i) + str(addr) + "\n")
                handle_client(c, addr, i)
                break                                 # fix here!
        else:
                i+=1