我在我的套接字 python 程序中找不到错误

Question

我正在学习套接字教程，突然我的代码中出现了一个我无法理解或找不到的错误

任何人都可以帮我找到错误吗？我参考了教程代码，但它不起作用。唯一的办法就是copy/paste我不喜欢

这是我的 server.py 文件

import socket
import threading
HEADER = 64
FORMAT = 'utf-8'
PORT = 5050
DISCONNECTED_ADDR = "!disCONNECTED"
SERVER = socket.gethostbyname(socket.gethostname())
print(SERVER)
ADDR = (SERVER, PORT)

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(ADDR)

def handle_client(conn, addr):
    print(f"[NEW CONNECTION] {addr} connected.")

    connected = True
    while connected:
        msg_length = conn.recv(HEADER).decode(FORMAT)
        if msg_length:
            msg_length = int(msg_length)
            msg = conn.recv(msg_length).decode(FORMAT)
            if msg == DISCONNECTED_ADDR:
                connected = False

            print(f"[{addr}] {msg}")
            conn.send("Msg received".encode(FORMAT))

    conn.close()

def main():
    print(f"[LISTENING] Server listening on {SERVER}")
    server.listen()
    while True:
        conn, addr = server.accept()
        thread = threading.Thread(target=handle_client, args=(conn, addr))
        thread.start()
        print("STARTED")


print("APP STARTED")
main()

这是我的 client.py 文件


import socket

HEADER = 64
FORMAT = 'utf-8'
PORT = 5050
DISCONNECTED_ADDR = "!disCONNECTED"

SERVER = "#myipaddress"
ADDR = (SERVER, PORT)
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect(ADDR)

def send(msg):
    message = msg.encode(FORMAT)
    msg_length = len(message)
    send_length = str(msg_length).encode(FORMAT)
    send_length += b' ' * (HEADER - len(send_length)-1)
    client.send(send_length)
    client.send(message)
    print(client.recv(2048).decode(FORMAT))


send("Hello World!")
input()
send("Hello Everyone!")
input()
send("Hello Tim!")

send(DISCONNECTED_ADDR)

Answer 1

Can anyone help me find the bug?
    send_length += b' ' * (HEADER - len(send_length)-1)

您错误计算了客户端中 header 的填充长度。我不知道为什么你认为需要减少 1 - 它不合适，正确：

    send_length += b' ' * (HEADER - len(send_length))

我在我的套接字 python 程序中找不到错误

I can't find the error in my socket python program

python

sockets

debugging

network-programming