tcpclient程序示例

TCPClient是一个简单的网络应用程序，用于通过TCP协议连接到远程服务器并发送数据。下面是一个基本的Python TCP客户端示例，它使用socket库：

import socket

def send_message(host, port, message):
    # 创建一个TCP/IP socket
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    try:
        # 连接到指定主机和端口
        client_socket.connect((host, port))
        
        # 发送消息
        client_socket.sendall(message.encode('utf-8'))

        # 接收服务器响应
        response = client_socket.recv(1024)
        print("Received from server:", response.decode('utf-8'))
    
    except ConnectionRefusedError:
        print(f"Connection refused by {host}:{port}.")
    finally:
        # 关闭连接
        client_socket.close()

# 示例：向www.example.com的80端口发送一条消息
send_message("www.example.com", 80, "Hello, Server!")