Python 套接字 : how to connect between two computers on the same wifi

Question

我设置了两台并排的笔记本电脑，想在它们之间发送消息，我发现当客户端和服务器都在同一台计算机上时代码可以工作，但当它们在同一台计算机上时它不会工作分离。

#SERVER
import socket

def Main():
    host = "localhost"
    port = 5000

    mySocket = socket.socket()
    mySocket.bind((host,port))

    mySocket.listen(1)
    conn, addr = mySocket.accept()
    print ("Connection from: " + str(addr))
    while True:
            data = conn.recv(1024).decode()
            if not data:
                    break
            print ("from connected  user: " + str(data))

            data = str(data).upper()
            print ("sending: " + str(data))
            conn.send(data.encode())

    conn.close()

if __name__ == '__main__':
    Main()


#CLIENT
import socket

def Main():
        host = '0.0.0.0'#127.0.0.1
        port = 5000

        mySocket = socket.socket()
        mySocket.connect((host,port))

        message = input(" -> ")

        while message != 'q':
                mySocket.send(message.encode())
                data = mySocket.recv(1024).decode()

                print ('Received from server: ' + data)

                message = input(" -> ")

        mySocket.close()

if __name__ == '__main__':
    Main()

我尝试了很多不同的地址，包括 0.0.0.0、localhost、192.168... <- ifconfig 的 ip。问题是什么？我应该研究什么以获得最佳解决方案？

Answer 1

您需要告诉客户端您的服务器在您的网络上的地址和端口。您还需要告诉服务器要监听的地址和端口。

为方便起见，让我们绑定(bind)服务器的所有 IP 地址。为此，将服务器代码中的主机设置为“0.0.0.0”

对于客户端配置，您必须输入服务器地址。为此，我会在服务器代码中放置一行以显示该机器的主机名。

#SERVER
import socket

def Main():
    host = "0.0.0.0"
    port = 5000

    print socket.gethostname()

    mySocket = socket.socket()
    mySocket.bind((host,port))

    mySocket.listen(1)
    conn, addr = mySocket.accept()
    print ("Connection from: " + str(addr))
    while True:
            data = conn.recv(1024).decode()
            if not data:
                    break
            print ("from connected  user: " + str(data))

            data = str(data).upper()
            print ("sending: " + str(data))
            conn.send(data.encode())

    conn.close()

if __name__ == '__main__':
    Main()


#CLIENT
import socket

def Main():
        host = #put hostname here
        port = 5000

        mySocket = socket.socket()
        mySocket.connect((host,port))

        message = input(" -> ")

        while message != 'q':
                mySocket.send(message.encode())
                data = mySocket.recv(1024).decode()

                print ('Received from server: ' + data)

                message = input(" -> ")

        mySocket.close()

if __name__ == '__main__':
    Main()