Question

我正在尝试在我的树莓派和我的电脑之间进行通信我在 Pi 上运行服务器代码和在 PC 上运行客户端代码当我在同一网络上运行它时代码工作正常但是当我尝试采取它通过 Internet 客户端给出错误（[Errno 110] 连接超时）。以下是我正在使用的 Tech with Tim 套接字教程中的代码。

服务器代码

import socket 
import threading

HEADER = 64
PORT = 5050
SERVER = '0.0.0.0'
ADDR = (SERVER, PORT)
FORMAT = 'utf-8'
DISCONNECT_MESSAGE = "!DISCONNECT"

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 == DISCONNECT_MESSAGE:
                connected = False

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

    conn.close()
        

def start():
    server.listen()
    print(f"[LISTENING] Server is listening on {SERVER}")
    while True:
        conn, addr = server.accept()
        thread = threading.Thread(target=handle_client, args=(conn, addr))
        thread.start()
        print(f"[ACTIVE CONNECTIONS] {threading.activeCount() - 1}")


print("[STARTING] server is starting...")
start()

客户端代码

import socket

HEADER = 64
PORT = 5050
FORMAT = 'utf-8'
DISCONNECT_MESSAGE = "!DISCONNECT"
SERVER = "My_external_ip_address"
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))
    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(DISCONNECT_MESSAGE)

在服务器端，我使用 0.0.0.0 的 ip，而在客户端，我使用 this 帖子中建议的我的外部 Ip（公共 IPv4）。

我从 here 获得了我的公共 Ipv4。

我的电脑在 Windows 10 上运行，而 raspberry Pi 使用的是 Ubuntu Linux，两者都安装了 Python 3.7

使用 Python 套接字（通过互联网）

0 个答案: