python socket programming

communication cycle, can continue to communicate, send and receive messagesMSG=CONN.RECV (BUFSIZE)#listen to the news, obey. #If Len (msg) = = 0:break #如果不加, then the client being linked suddenly disconnects, recv no longer blocks, and the dead loop occurs Print(Msg,type (msg)) Conn.send (Msg.upper ())#send a message, speakconn.close ()#Hang up the phones.close ()#Mobile phone offservice-side improved versionView Code#_*_coding:utf-8_*___author__='Linhaifeng'ImportSocketip_port=('

1. ClientImport sockets = Socket.socket (socket.af_inet,socket. SOCK_STREAM) #建立TCP连接S.connect (' 192.168.1.109 ', 1111) #连接服务器, requires the server's address and portPrint (' This is the client! ‘)While True: t = input () #输入 S.send (T.encode (' UTF8 ')) #发送t的utf8格式数据 If T = = ' exit ': #如果发现是exit Break t= ' server: ' +s.recv (1024x768). Decode (' UTF8 ') #收到服务器来的数据 If T = = ' e

) print "Sent:%d characters, so far ..."%sent_data_length # Display Server re Sponse response = SELF.SOCK.RECV (buf_size) print "PID%s Received:%s"% (Current_procESS_ID, Response[5:]) def shutdown (self): "" "Cleanup the Client Socket" "" Self.sock.close () Class Forkingserverrequesthandler (Socketserver.baserequesthandler): def handle (self): # Send the echo back To the client data = SELF.REQUEST.RECV (buf_size) current_process_id = os.getpid () res

close the socket so that a complete network communication is over - $ $ #the data received include the HTTP header and the Web page itself, we just need to separate the HTTP header and Web page, the HTTP header print out, the content of the Web page saved to the file -Header, html = data.split (b'\r\n\r\n', 1) - Print(Header.decode ('Utf-8')) the #to write the received data to a file: -With open ('sina.html','WB') as F:Wuyi f.write (HTML) the - ##

notData: Break #python3 Use bytes, so encode #the message sent to me by s= '%s is: [%s]%s '% (Addr[0],ctime (), Data.decode (' UTF8 ')) #Format the dateisotimeformat='%y-%m-%d%x'stime=time.strftime (Isotimeformat, LocalTime ()) s='the message sent to me by%s is:%s'% (Addr[0],data.decode ('UTF8')) Tcpclientsock.send (S.encode ('UTF8')) Print([Stime],':', Data.decode ('UTF8')) #If you enter quit (ignoring case), the program exitsStop_chat= (Data.decode ('UTF8')

, Subscriber Datagram Protocol) is non-connected, message-oriented, providing efficient service. The Block merging optimization algorithm is not used, because UDP supports a one-to-many pattern, so the receiver Skbuff (socket buffer) uses a chain structure to record each incoming UDP packet, in each UDP packet there is a message header (message source address, port and other information), so for the receiving end, it is easy to distinguish between the

Python-socket principle in network programming, pythonsocket Python is a powerful network programming tool. We start from the socket module here. Methods for handling multiple connections: forking, threading, asynchronous I/OF

The server that implements socket communication in Python is complex, and the client is very simple, so the client is basically implemented by the SOCKCT module, and the serviceThere are many modules that can be used for the end, as follows:1, the Client2. Socketserver ModuleIn order to enable multiple clients to access the service and communicate at the same time, the server will use the Socketserver modul

OK, first write a Python socket server segment, to open three ports: 10000,10001,10002.krondo example is each server bound to a port, the test need to open 3 shell, respectively, run. It's too much trouble. The services are run with three thread respectively. Import optparse import OS import socket import time from threading import Thread import Stringio txt = '

I have already introduced some knowledge about pythonsocket. Here I would like to add some suggestions for you to make it easier. 1. semi-open socket Use the shutdown () function to convert two-way socket data transmission to one-way data transmission. Shutdown () requires a separate parameter, which indicates how to close the socket. Specifically: 0 indicates t

Features: Print host name and host IP:[email protected] python]# Cat socket1.py #!/usr/bin/pythonimport sockethost_name = socket.gethostname () print " hostname:%s "% host_nameprint" IP address:%s "%socket.gethostbyname (HOST_NAME)Operation Result:[Email protected] python]#./socket1.pyhostname:iz94gh8l046zIP address:10.170.16.67Module:Import socketHow to use:Socket.gethostname get hostname (/etc/hostname)So

server.py:"Service-Side Steps":1. Create a Socket object2. Bind the socket to the specified address (bind)3. Listen for connection requests (listen)4. Waiting for customer request (accept)5. Processing requests (the server and client communicate via the send and recv methods (transfer data).6. Close the connection after the transferis complete (close)client.py:"Client Steps":1. Create a

Server-side code:Import Socket,commandshost = ' Port = 1053s = Socket.socket (socket.af_inet,socket.Sock_stream) S.bind ((Host,port)) S.listen (1) while 1:conn,addr = S.accept () while 1:data = CONN.RECV (1024)CC,BB = commands.getstatusoutput (data) If Len (Bb.strip ())! = 0:conn.sendall (BB) Else: Conn.sendall ("Done")Client side:Import Socket,oss = Socket.socket (socket.af_inet,

request handler class.Next you have to instantiate a server class that, during instantiation, needs to pass in the service-side address and the class of the request handle.3.Then Call the Handle_request () or Serve_forever () method of the server object to process one or many requests.Then, execute the handle_request () or Serve_forever () method of the server object to process one or more requests.4.Finally, call Server_close () to close the socket.Finally, execute the Server_close () method t

, PORT))8 9 whileTrue:Tenmsg = input (">>>:"). Strip () One ifLen (msg) = =0: A Continue - Client.sendall (Msg.encode ()) - thedata = CLIENT.RECV (1024) - - Print('Received', Data.decode ())First open the server, and then turn on client 1, client 2, in the client 1 input information can receive server response information, in the client 2 input information can not receive server response information, at this time disconnect client 1, client 2 can receive the service side of th

Python can invoke the socket module for TCP/UDP processing. The socket can choose a different type, that is, a socket for UNIX threads and a processing interface that is provided to the upper level for the TCP/IP protocol. TCP/UDP is through the socket interface to establish

Programming to shabbiness http://blog.csdn.net/aspnet_lyc/article/details/38946915 with C + + socketsServerImport Socketport = 9999BACKLOG = 5MAXLINE = 1024LISTENFD = Socket.socket (socket.af_inet,socket. Sock_stream) Listenfd.bind ((", PORT)) Listenfd.listen (BACKLOG) while true:connfd, connaddr = listenfd.accept () print ' A New Connection ' BUF = []buf = Connfd.recv (MAXLINE) print bufconnfd.send (' h

try是因为有时候会发生但无法预知的错误Data=conn.recv (1024x768)#最大收1024if not data:break #针对linuxPrint (Data.decode (' Utf-8 '))Conn.send (Data.upper ())except Connectionreseterror: Break#6, hang up the phoneconn.close () #断开连接#7. Shutting down the machinephone.close ()Client:Import socket#买手机Phone=socket.socket (Socket.af_inet,socket. SOCK_STREAM)There's no need to bind #绑定手机卡 client, so no.#开机 don't have to listen.#等电话链接Ph

Network Programming Socket INTRODUCTIONThere are many types of data that are passed between computers, such as video, pictures, files, etc., but there are many protocols on the network that support different types of data, such as HTTP, SMTP, DNS, FTP, SSH, ICMP, and so on. In fact, these protocols are also some data flow exchange, but work in a different way, no matter how they change, are inseparable from

The service-side code is as follows:# _*_ Coding:utf-8 _*_Import socketImport datetimeHost= ' 0.0.0.0 'port=3434S=socket.socket (Socket.af_inet,socket. SOCK_STREAM)S.bind ((Host,port))S.listen (1)While True:Conn,addr=s.accept ()print ' Client%s connected! ' %str (addr)Dt=datetime.datetime.now ()Message= ' Current time is ' +str (DT)Conn.send (Message)Print "Sent:", messageConn.close () The client code is as follows:Import socketHost= ' 127.0.0.1 'p