Python TCP 协议网络编程《三》

今日主题：在Python TCP 协议网络编程《二》的基础上增加了当服务器重启后客户端不挂掉，客户端能够重试连接服务端的功能。

代码实现如下：

server.py文件内容如下

 1from socket import socket,SOCK_STREAM,AF_INET #导入模块
 2
 3def tcp_server():
 4    tcp_server_socket=socket(AF_INET,SOCK_STREAM) #创建TCP服务端套接字对接，UDP是SOCK_DGRAM
 5    server_address=('127.0.0.1',9999)#定义本TCP服务端的ip and port
 6    tcp_server_socket.bind(server_address) #绑定本机的9999端口
 7    tcp_server_socket.listen() #执行监听
 8    client_socket,client_info = tcp_server_socket.accept() #接收客户端的socker and info
 9    while 1:
10        data=client_socket.recv(1024)#接收客户端发过来的消息
11        datas=data.decode("utf-8")
12        if(len(datas)>1):
13            print("the client say:",datas)#打印客户端发送过来的信息
14            if(datas=="bye"):
15                break
16            server_answer=input('>>>')#从键盘录入信息
17            client_socket.send(server_answer.encode("utf-8"))
18
19if __name__ == '__main__':
20    print("the TCP server is running ...")
21    tcp_server()

client.py文件内容如下

 1import time
 2
 3from socket import socket,SOCK_STREAM,AF_INET #导入模块
 4
 5
 6def connection_socket():
 7    tcp_client_socket = socket(AF_INET, SOCK_STREAM)  # 创建TCP客户端套接字对接
 8    server_address = ('127.0.0.1', 9999)  # 定义本TCP服务端的ip and port
 9    try:
10        tcp_client_socket.connect(server_address)  # 连接到服务端
11    except:
12        print("connection failed!!!")
13        exit(0)
14    return tcp_client_socket
15
16def tcp_client():
17    while 1:
18        try:
19            tcp_client_socket=connection_socket()
20            message=input("client>>>") #定义要发送的消息
21            print("the message is:",message)
22            print(tcp_client_socket)
23            tcp_client_socket.send(message.encode("utf-8"))#向服务端发送消息
24            response=tcp_client_socket.recv(1024)
25            print("the server say:",response.decode("utf-8"))
26        except:
27            tcp_client_socket.close()#关闭原有socket连接
28            print("the socket connection is failed, try again to reconnection...")
29            time.sleep(3)
30
31if __name__ == '__main__':
32    print("the TCP client is running ...")
33    tcp_client()
34    print("the message was send")

client console output:

 1the TCP client is running ...
 2
 3client>>>abc
 4the message is: abc
 5<socket.socket fd=200, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 55699), raddr=('127.0.0.1', 9999)>
 6the server say: def
 7
 8client>>>aa
 9the message is: aa
10<socket.socket fd=1888, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 55700), raddr=('127.0.0.1', 9999)>
11the socket connection is failed, try again to reconnection...
12
13client>>>abc
14the message is: abc
15<socket.socket fd=1888, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 55703), raddr=('127.0.0.1', 9999)>
16the server say: def
17client>>>

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