The socket of the Python module

43, the Python module socket:

Python is powerful in network communication, learn the basic way of socket communication

UDP communication:

Server:

Import Socketport=8081s=socket.socket (Socket.af_inet,socket. SOCK_DGRAM) #从指定的端口, from any sender, receives the UDP data S.bind ((", port)) print (' Waiting for access ... ') while True:    #接收一个数据    data,addr= S.recvfrom    Print (' Received: ', data, ' from ', addr)

Client:

Import socketport=8081host= ' localhost ' s=socket.socket (socket.af_inet,socket. SOCK_DGRAM) s.sendto (b ' Hello,this is a test info! ', (Host,port))

Very simple. Here is the TCP method:

Server:

#-*-coding:utf-8-*-from Socket import *from time import ctimehost= ' port=12345bufsiz=1024addr= (HOST, PORT) sock=socket (Af_inet, Sock_stream) sock.bind (ADDR) Sock.listen (5) while True:    print (' Waiting for connection ')    Tcpclientsock, addr=sock.accept ()    print (' Connect from ', addr) while    True:        try:            data= TCPCLIENTSOCK.RECV (Bufsiz)        except:            print (e)            tcpclientsock.close ()            break        if not data:            Break        s= ' hi,you send me: [%s]%s '% (CTime (), Data.decode (' UTF8 '))        tcpclientsock.send (S.encode (' UTF8 '))        print ([CTime ()], ': ', Data.decode (' UTF8 ')) tcpclientsock.close () Sock.close ()

Client:

#-*-coding:utf-8-*-from Socket import *class TcpClient:    host= ' 127.0.0.1 '    port=12345    bufsiz=1024    Addr= (HOST, PORT)    def __init__ (self):        self.client=socket (Af_inet, Sock_stream)        Self.client.connect ( Self. ADDR) while        True:            data=input (' > ')            if not data:                break            self.client.send (Data.encode (' UTF8 ' ))            data=self.client.recv (self. BUFSIZ)            If not data:                break            print (Data.decode (' UTF8 '))            if __name__ = = ' __main__ ':    client= TcpClient ()

There is a problem with TCP above, we can not quit, OK, let's change it so that the program could send the QUIT command to exit:

Server:

#-*-coding:utf-8-*-from Socket import *from time import ctimefrom time import localtimeimport timehost= ' port=1122 #设置 Listening Port bufsiz=1024addr= (HOST, Port) sock=socket (Af_inet, Sock_stream) sock.bind (ADDR) Sock.listen (5) #设置退出条件STOP_CHAT = Falsewhile not Stop_chat:print (' Waiting for access, listening port:%d ' (port)) Tcpclientsock, addr=sock.accept () print (' Accept connection, client address: ', ad DR) while True:try:data=tcpclientsock.recv (Bufsiz) except: #print (E) t Cpclientsock.close () Break if not data:break #python3使用bytes, so encode #s = '%s sent to My message is: [%s]%s '% (Addr[0],ctime (), Data.decode (' UTF8 ')) #对日期进行一下格式化 isotimeformat= '%y-%m-%d%x ' stime= Time.strftime (Isotimeformat, LocalTime ()) s= '%s sent me the message is:%s '% (Addr[0],data.decode (' UTF8 ')) Tcpclientsock.sen D (S.encode (' UTF8 ')) print ([Stime], ': ', Data.decode (' UTF8 ')) #如果输入quit (ignoring case), the program exits stop_chat= (DATA.D     Ecode (' UTF8 '). Upper () = = "QUIT")   If STOP_CHAT:breaktcpClientSock.close () Sock.close () 

Client:

#-*-coding:utf-8-*-from Socket import *class TcpClient:    #测试, connect the native    host= ' 127.0.0.1 '    #设置侦听端口    port= 1122     bufsiz=1024    addr= (HOST, PORT)    def __init__ (self):        self.client=socket (Af_inet, Sock_stream)        Self.client.connect (self. ADDR)        while True:            data=input (' > ')            if not data:                break            #python3传递的是bytes, so encode            Self.client.send (Data.encode (' UTF8 '))            print (' Send message to%s:%s '% (self). Host,data))            if data.upper () = = "QUIT": Break                        data=self.client.recv (self. BUFSIZ)            If not data:                break            print (' info received from%s:%s '% (self). Host,data.decode (' UTF8 ')))                        if __name__ = = ' __main__ ':    client=tcpclient ()

Note: The above code is PYTHON3.

The socket of the Python module