TCP套接字编程

TCP套接字编程：客户向服务器发送一行数据，服务器将这行改为大写并会送给客户。

客户端代码

from socket import *
serverName = 'localhost'
serverPort = 12000
clientSocket = socket(AF_INET,SOCK_STREAM)
clientSocket.connect((serverName,serverPort))
sentence = input('Input lowercase sentence:')
clientSocket.send(sentence.encode('utf-8'))
modifiedSentence = clientSocket.recv(1024)
print('From Server:' + modifiedSentence.decode())
clientSocket.close()

服务端代码

from socket import *
serverPort = 12000
serverSocket = socket(AF_INET,SOCK_STREAM)
serverSocket.bind(('',serverPort))
serverSocket.listen(1)
print('The server is ready to receive')
while 1:
    connectionSocket, addr = serverSocket.accept()
    sentence = connectionSocket.recv(1024)
    capitalizedSentence = sentence.upper()
    connectionSocket.send(capitalizedSentence)
    connectionSocket.close()