Python网络编程-TCP服务器

import socket


def main():
    # 1. socket创建一个套接字
    tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 2. bind绑定ip和port
    local_addr = ("", 9999)
    tcp_server_socket.bind(local_addr)
    # 3. listen使套接字变为可以被动连接
    tcp_server_socket.listen(128)
    # 4. accept等待客户端的链接
    print("等待客户端的接入...")
    new_client_socket, client_addr = tcp_server_socket.accept()
    print("有新的客户端接入...")
    print("%s:%s已与服务器建立连接..." % (client_addr[0], client_addr[1]))
    # 5. recv/send接收发送数据
    recv_data = new_client_socket.recv(1024)
    print("%s" % recv_data.decode("gbk"))
    # 回送数据
    new_client_socket.send("ok".encode("gbk"))
    # 关闭套接字
    new_client_socket.close()
    tcp_server_socket.close()


if __name__ == "__main__":
    main()

import socket


def main():
    # 创建socket
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 绑定本地信息
    server_socket.bind(("", 8888))
    # 变主动为被动
    server_socket.listen(128)
    # 等待客户机的链接
    while True:
        print("等待客户端的链接...")
        new_client_socket, client_addr = server_socket.accept()
        print("%s:%s已经链接到服务器" % (client_addr[0], client_addr[1]))
        # 接收数据
        recv_data = new_client_socket.recv(1024)
        # 打印接收到的数据
        print(recv_data.decode("gbk"))
        # 发送数据
        new_client_socket.send("connect ok!".encode("gbk"))
        # 关闭新socket
        new_client_socket.close()
        print("为%s:%s服务完毕" % (client_addr[0], client_addr[1]))
    # 关闭socket
    server_socket.close()


if __name__ == "__main__":
    main()

import socket


def main():
    # 创建socket
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 绑定本地信息
    server_socket.bind(("", 8888))
    # 设置主动为被动
    server_socket.listen(128)
    # 监听
    while True:
        print("等待客户端的链接...")
        new_client_socket, client_addr = server_socket.accept()
        print("%s已经链接到服务器" % str(client_addr))
        while True:
            # 接收数据
            recv_data = new_client_socket.recv(1024)
            if recv_data:
                # 打印接收到的数据
                print(recv_data.decode("gbk"))
                # 发送数据
                new_client_socket.send("ok".encode("gbk"))
            else:
                break
        # 关闭新链接的socket
        new_client_socket.close()
        print("已经服务完成...")
    # 关闭socket
    server_socket.close()



if __name__ == "__main__":
    main()