不同于UDP，TCP首先要用一个欢迎套接字，握手成功后创建一个新的传输套接字

客户端

  1. """
  2. TCP Socket的客户端
  3. 环境 python3
  4. """
  6. from socket import *
  8. serverName = '180.201.20.208'
  9. serverPort = 12000
  10. clientSocket = socket(AF_INET, SOCK_STREAM)
  11. clientSocket.connect((serverName, serverPort))
  12. # python3 改动
  13. sentence = input("Input lowercase sentence:")
  14. # python3 改动 socket要求byte类型数据
  15. clientSocket.send(sentence.encode())
  16. modifiedSentence = clientSocket.recv(1024)
  17. # python3 改动
  18. print("From Server:" + modifiedSentence.decode())
  19. clientSocket.close()

服务器端

  1. """
  2. TCP Socket的服务器端
  3. 环境 python3
  4. """
  6. from socket import *
  7. serverPort = 12000
  8. serverSocket = socket(AF_INET, SOCK_STREAM)
  9. serverSocket.bind(("", serverPort))
  10. serverSocket.listen(1)
  11. # python3 改动
  12. print("The server is ready to receive")
  13. while 1:
  14.     connectSocket , addr = serverSocket.accept()
  15.     sentence = connectSocket.recv(1024)
  16.     capitalizeSentence =sentence.upper()
  17.     connectSocket.send(capitalizeSentence)
  18.     connectSocket.close()

实验结果

输入小写字符串，能够返回大写字符串
image.png