2025年2月2日（网络编程 tcp）

tcp 循环服务

import socketdef main():# 创建 socket# 绑定tcp_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)tcp_server.bind(("", 8080))# socket 转变为被动tcp_server.listen(128)while True:# 产生专门为链接进来的客户端服务的 socketprint("堵塞-1")server_client, client_addr = tcp_server.accept()# 接收数据（来自客户端）print(client_addr)while True:recv_msg = server_client.recv(1024)if recv_msg:print(recv_msg.decode("utf-8"))else:print("用户下线")break# 发送数据（发送到客户端）server_client.send("谢谢".encode("utf-8"))# 关闭套接字server_client.close()print("服务完毕")tcp_server.close()if __name__ == "__main__":main()

下载器

import socketdef main():# 创建 sockettcp_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)tcp_client.bind(("", 8081))# 链接服务器tcp_client.connect(("192.168.0.178", 8080))# 发送数据send_data = input("请输入下载名称：")tcp_client.send(send_data.encode("utf-8"))# 接收数据recv_msg = tcp_client.recv(1024)  # 1024 bytes 1 kBprint(recv_msg)# 保存数据# 存在再创建if recv_msg:  # 服务器关闭解堵塞with open("[测试]" + send_data, "wb") as f:f.write(recv_msg)# 关闭套接字tcp_client.close()if __name__ == "__main__":main()

import socketdef main():# 创建 socket# 绑定tcp_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)tcp_server.bind(("192.168.0.178", 8080))# socket 转变为被动tcp_server.listen(128)# 产生专门为链接进来的客户端服务的 socketprint("堵塞-1")server_client, client_addr = tcp_server.accept()# 接收数据（来自客户端）print(client_addr)recv_msg = server_client.recv(1024)print(recv_msg.decode("utf-8"))# 发送数据（发送到客户端）file_name = recv_msg.decode("utf-8")file_content = Nonetry:f = open(file_name, "rb")file_content = f.read()f.close()except Exception:print("没有要下载的文件")if file_content:server_client.send(file_content)# 关闭套接字server_client.close()tcp_server.close()if __name__ == "__main__":main()