python socket programming

a tuple (ipaddr,port)Sk.fileno ()file descriptor for socketsSecond, get some address and host nameThe socket module provides several functions for working with host names and addresses.Socket.gethostname ()GetHostName () returns the host name of the computer on which the program is runningSocket.gethostbyname (' www.jb51.net ')gethostbyname (name) attempts to interpret the given host name as an IP address.GETHOSTBYNAME_EX (name)It returns a tuple of

and port number for this machine2.2 Getpeername () Peer IP and port number#!/usr/bin/env python# Information arppingingimport socketprint "Creating socket..."s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)print "done."print "Connect socket..."s.connect(("www.arppinging.com",80))print "done."# 获取本机的IP和portprint "Connected from",s.getsockname()# 获取对端的IP和portp

server.py at the terminal and then running clien.py will print "Welcome to server!" at the terminal. If you change client.py's Sock.send (' 1 ') to a different value in the terminal will print "Please go out!", Change Time.sleep (2) to a value greater than 5, the server will time out.www.qytang.com/http://www.qytang.com/cn/list/29/http://www.qytang.com/cn/list/28/610.htmhttp://www.qytang.com/cn/list/28/595.htmhttp://www.qytang.com/cn/list/28/583.htmhttp://www.qytang.com/cn/list/28/582.htmhttp:/

Python 3.x Study Notes 13 (Network Programming socket), pythonsocket 1. ProtocolHttp, smtp, dns, ftp, ssh, snmp, icmp, dhcp... 2. Layer 7 OSIApplication, representation, session, transmission, network, data link, physical 3. socket: Encapsulation of all upper-layer protocols 4. Common

also the Communication Foundation of the upper application.2. The server in order to respond to multiple requests at the same time, you can select processes, threads, and other methods to process the incoming requests, the general choice thread or the association3. CPython because the Gil guarantees that a nucleus can only run one thread at a time, a multi-process in a sense just opens up multiple threads, and the process overhead is not a good method, that is, asynchronous

address families, Python supports a variety of address families, but since we only care about network programming, most of the time I use af_inet only)Iv. Socket WorkflowA scene in the life. You have to call a friend, dial first, a friend hears a phone call, and then you and your friend establish a connection, you can talk. When the communication is over, hang u

:‘, modified_message)tcp_client_socket.close()SummaryAt the time of writing this demo, I made a few minor mistakes: In the TCP server socket, my recv method was not connection_socket operational on the connection, resulting in an error: Transport endpoint is not connectedSimilar: https://stackoverflow.com/questions/35969714/error-transport-endpoint-is-not-connected-python-sockets In the TCP cli

Recently learning Python, but also need to learn some of the network programming knowledge, wrote a simple chat room program. The program is divided into two Python files, one is server.py and the other is client.py.The process for socket programming is as follows:　　　　Servic

Python/socket programming of sticky bagSticky Bag:Only TCP has a urine packet phenomenon, UDP will never sticky packets.First you need to master a socket to send and receive messagesthe principleThe sender can be 1k,1k send data and the receiving end of the application can 2k,2k extract data, of course, it may be 3k or

Socket is the foundation of Network application. Python makes it super easy to get started with web socket programming. In this brief introduction we will create a simple server for accepting and requesting the corresponding client program.Since I have recently been a bit obsessed with Linux containers, we will also im

()BreakIf not data:Breaks= ' hi,you send me: [%s]%s '% (Time.ctime (), Data.decode (' UTF8 '))Connection.send (S.encode (' UTF8 '))Print ([Time.ctime ()], ': ', Data.decode (' UTF8 '))Connection.close ()Sock.close ()client.py#!/usr/bin/env python# tcp-clientImport socketImport SysHost= ' 127.0.0.1 'port=8001bufsiz=1024Client=socket.socket (Socket.af_inet,socket. SOCK_STREAM)Client.connect ((Host,port))Whil

This article mainly introduces the Python network programming using Select to implement the socket full-duplex asynchronous communication function, here to share to everyone, the need for friends can refer to the next The examples in this paper describe Python network programming