今日主题：今天分享的内容是在 Python TCP 协议网络编程《四》的基础上增加了在服务端的登录用户校验，如果客户端输入的用户名不是服务端列表中的，就无法进入正常的聊天室。

具体实现代码如下

server.py文件内容如下

 1from socket import socket,SOCK_STREAM,AF_INET #导入模块 2from threading import Thread #导入线程包 3 4sockets=[] #用于存放所有请求过来的client的socket 5 6userlist=['tony','jack','lucy','lily'] 7 8def tcp_server(): 9 tcp_server_socket=socket(AF_INET,SOCK_STREAM) #创建TCP服务端套接字对接，UDP是SOCK_DGRAM 10 server_address=('127.0.0.1',9999)#定义本TCP服务端的ip and port 11 tcp_server_socket.bind(server_address) #绑定本机的8888端口 12 tcp_server_socket.listen(128) #设置监听,并设置最大等待连接数为128 13 while 1: 14 print("i'm accepting") 15 client_socket, client_info = tcp_server_socket.accept() # 接收客户端的socker and info 16 print(client_socket,client_info) 17 sockets.append(client_socket) 18 t=Thread(target=get_msg,args=(client_socket,)) #开启线程来处理当前请求过来的client 19 t.start() 20 21def get_msg(client_socket): 22 while 1: 23 data=client_socket.recv(1024) 24 print("the data:",data) 25 name=str(data,encoding="utf-8") 26 print("the data:",name) 27 if(len(data)>0 and name in userlist): 28 for sk in sockets: 29 print(sk,data) 30 sk.send(data) 31 else: 32 for sk in sockets: 33 sk.send("username is wrong,please input again...".encode("utf-8")) 34 35 36if __name__ == '__main__': 37 print("the TCP server is running ...") 38 tcp_server() 

client.py文件内容如下

 1from socket import socket,SOCK_STREAM,AF_INET #导入模块 2from threading import Thread #导入线程包 3 4tcp_client_socket = socket(AF_INET, SOCK_STREAM) # 创建TCP客户端套接字对接 5server_address = ('127.0.0.1', 9999) # 定义本TCP服务端的ip and port 6tcp_client_socket.connect(server_address) # 连接到服务端 7 8response='' 9count=1 10 11def tcp_client(): 12 thread1=Thread(target=read_msg,args=(tcp_client_socket,)) 13 thread1.start() 14 15 thread2= Thread(target=send_msg, args=(tcp_client_socket,)) 16 thread2.start() 17 18def send_msg(tcp_client_socket): 19 global count 20 while 1: 21 if(count==1): 22 message = input(">>>请输入你的登录名称：") 23 else: 24 if("wrong" not in response): 25 message = input(">>>可以开始聊天：") 26 else: 27 message = input(">>>请输入你的登录名称：") 28 tcp_client_socket.send(message.encode("utf-8")) 29 import time 30 time.sleep(1) 31 count+=1 32 33def read_msg(tcp_client_socket): 34 global response 35 while 1: 36 resv_data = tcp_client_socket.recv(1024) 37 print("the response of message is:",resv_data.decode("utf-8")) 38 response=resv_data.decode("utf-8") 39 40if __name__ == '__main__': 41 print("the TCP client is running ...") 42 tcp_client() 

client console output内容如下

1the TCP client is running ... 2>>>请输入你的登录名称：aa 3the response of message is: username is wrong,please input again... 4>>>请输入你的登录名称：bb 5the response of message is: username is wrong,please input again... 6>>>请输入你的登录名称：tony 7the response of message is: tony 8>>>可以开始聊天：