python - Client.py无法连接到server.py

Question

我对python3网络(套接字)编程有问题。问题是，当我运行server.py时，一切都很好。比起我打开client.py，它必须连接到server.py，但不能连接。它停留5-15秒，然后给出有关连接的错误。我给访问 python 使用网络。我不知道为什么它不起作用。
Server.py代码:

import socket

socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

host = '127.0.0.1'
port = 80

Buffer_Size = 1024

socket.bind((host, port))
socket.listen(1)
connectionNumber = 1
print("\n" + "[SERVER] Port" + str(port) + "opened. Connections are listening..." + "\n")

while True:
    print("\n" + "*"*50)
    print("[SERVER] Waitong connection {}...".format(connectionNumber))
    conn, addr = socket.accept()
    print("[SERVER] Connected to {}".format(addr))
    print("[SERVER] Receiving bytes...")
    while True:
        msgFromClient = socket.recv(Buffer_Size)
        if not msgFromClient:
            print("[SERVER] No message received.")
            break
        
        print("[CLIENT]: {}".format(msgFromClient))
        print("[SERVER] Message received, buffer emptied. " + connectionNumber + "Closing Connection...")
        conn.send(str(msgFromClient) + ". You are the client. Thanks for connecting!")
    conn.close()
    print("[SERVER] Connection closed...")
    connectionNumber += 1

client.py代码:

import getpass

pcName = getpass.getuser()

import socket

clientName = socket.gethostname()
clientIP = socket.gethostbyname(socket.gethostname())

sendingMessageToServer = pcName +"___" + clientName + "___"+ clientIP

import socket

clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

host = '127.0.0.1'
port = 80
Buffer_Size = 1024
clientSocket.connect((host, port)) 

print("Sending message: {}".format(sendingMessageToServer))

clientSocket.send(sendingMessageToServer)

print("Message Sended Succesfully!")

messageFromServer = clientSocket.recv(Buffer_Size)

print("[SERVER] Received message: {}".format(messageFromServer))

print("[CLIENT SERVER] Message received.. Closing connection...")

clientSocket.close()

Answer 1

首先，您应该更改端口80，因为它被http连接使用。也许您的系统正在接管它。设置例如端口8001。在server.py中，您从创建的conn对象(而不是socket)获取传入数据:

msgFromClient = conn.recv(Buffer_Size)

另外，通过套接字接收或发送的数据应为bytes类型，而不是str，因此您应将所有recv和send参数更改为字节，例如:

conn.send(msgFromClient + b". You are the client. Thanks for connecting!")

或client.py中:

clientSocket.send(sendingMessageToServer.encode())