python socket programming

code:Import java.io.IOException;Import Java.io.OutputStream;Import Java.net.ServerSocket;Import Java.net.Socket;public class Myserver {Establish the ServerSocket and set its port numberPrivate ServerSocket SS;public static final int port=8962;Public Myserver () {try{Ss=new ServerSocket (port);}catch (IOException e) {E.printstacktrace ();}}public void SetConnection () throws ioexception{Create a server-side socketSocket s;OutputStream OS;try{//serversocke.accept () t returns a

[UNIX Network Programming] basic TCP socket programming and unix Network Programming The concurrent server described in this chapter is a single customer Process Model Implemented by fork. The following is the socket function of the basic TCP client/server program (the sched

Socket programming refers to a complete set of API programming about sockets, not just the use of socket () system calls, but also a complete set of functions around this system call. Here we will start from the basics and learn how to write the socket program initially. hos

(SOCKFD, (const struct sockaddr *) serveraddr, sizeof (serveraddr)) = =-1) err_exit ("Connect error"); Char buf[512]; while (Fgets (buf, sizeof (BUF), stdin)! = NULL) {if (write (SOCKFD, buf, strlen (buf)) = = =-1) err_exit ( "Write socket error"); memset (buf, 0, sizeof (BUF)); int readbytes = Read (SOCKFD, buf, sizeof (BUF)); if (readbytes = = 0) {cerr Attached-makefile. Phony:clean all CC = g++ Cppflags =-wall-g-

Socket Communication in Python twisted framework Reprinted: http://blog.csdn.net/jackyyen/archive/2009/04/13/4069887.aspx Python Network toolkit twisted Matrix Twisted matrix is an increasingly popular pure Python framework for programming network services and applicati

(LISTENFD, (const struct sockaddr *) addr, sizeof (addr)) = =-1) err_exit ("Bind error"); if (Listen (LISTENFD, somaxconn) = =-1) err_exit ("Listen error"); Char buf[512]; int readbytes; struct sockaddr_in clientaddr; Remember: Be sure to initialize socklen_t Addrlen = sizeof (CLIENTADDR) here; while (true) {int clientfd = accept (LISTENFD, (struct sockaddr *) clientaddr, addrlen); if (clientfd = =-1) err_exit ("Accept error"); Print client IP address and port numb

C #2.0 Socket socket programming example Author: knife and light dance First, explain the network communication using the socket interface in principle. Here we use the most common C/S mode as an example. First, the server has a process (or multiple processes) wait for the customer to connect to the specified port, an

Network protocol seven-tier structure:What is a socket?The socket (socket) is the end of the two-program data exchange between the two-way channel, which can be understood as an interface. Using socket programming is also known as network

The sample program is a synchronous socket program, the function is very simple, just the client sends a message to the server, the server returns a message to the client, here is just a simple example, is a basic socket programming process, in the next article, will record the synchronization and asynchronous sockets, and their differences.The following is a sim

In the article Java Socket Chat room programming (i) the use of socket to implement chat message push we talked about how to use the socket to allow the server and the client to pass messages between the message to achieve the purpose of the push message, and then I will write out how to let the server establish client

::getaddr () {if (IsValid ()) {return Inet_ntoa (M_ADDRESS.SIN_ADDR); } return std::string ();} int SOCKET::GETPORT () const{if (IsValid ()) {return ntohs (m_address.sin_port); } return-1;} static ssize_t readn (int fd, void *buf, size_t count) {size_t nleft = count; ssize_t nread = 0; Char *ptr = Static_castSocketException.h#ifndef socketexception_h_included#define socketexception_h_included//Exception handling Class (the next section will u

SendBuf; while (Getline (CIN,SENDBUF)) { if (!clientsocket.send (clientsocket,sendbuf)) { Err_exit (" Send Error "); } Sendbuf.clear (); if (!clientsocket.receive (clientsocket,sendbuf)) { err_exit ("Receive error"); } cout Attached -commen.h#ifndef comment_h_included#define comment_h_included#include "Socket.h" #include Attached -makefileCC = g++ Cppflags =-wall-g-pthreadbin = Server Clientsources = $ (bin.=.cp

SocketI. OverviewSockets are also commonly referred to as "sockets," which describe IP addresses and ports, and are a handle to a chain of communication, where applications usually make requests to the network through "sockets" or respond to network requests.Sockets originate from UNIX, and one of the basic philosophies of unix/linux is "Everything is file", and the file is operated with "open" "Read and Write" "Off" mode. Socket is an implementation

program will always block at the receive () method, which is certainly not possible for the client, in order to avoid this problem, We use the Datagramsocket class's Setsotimeout () method on the client to develop the maximum blocking time for the receive () method and specify the number of times the datagram will be re-sent, and if each block times out and the number of postbacks reaches the set limit, the client is shut down.6. The UDP server uses the same

Original://http://blog.csdn.net/linybo/article/details/51141960The sample program is a synchronous socket program, the function is very simple, just the client sends a message to the server, the server returns a message to the client, here is just a simple example, is a basic socket programming process, in the following article, The synchronization and asynchrony

Day8 -- socket network programming advanced, day8 -- socket Socket: socketIt is to achieve data exchange between the server and the client. The server receives and sends data, and the client sends and receives data.Python3. This is because the client needs to convert to bytecode when sending a connection to the server,

(127.0.0.1) and the local address (192.168.12.104) finally took some time to parse the host name, but the host corresponding to it was not found, the inetaddress class can obtain information about the network address and some network address attributes. The networkinterface class can obtain some information about a host network interface, which is very helpful for programming. TCP socket The following is

Related reading: Java Socket Chat Room Programming (ii) the use of socket to achieve a single chat room There are many examples of using sockets to implement chat online, but I have seen many, many problems exist. Here I will implement a more complete chat example and explain the logic. Because this piece of socket

Socket programming practices in Linux (5) solutions for setting socket I/O timeout (1) Use the alarm function to set timeout #include unsigned int alarm(unsigned int seconds); Its main function is to set a signal transmission alarm. The signal SIGALRM is sent to the current process after the specified number of seconds in seconds. If the alarm functio

= In.read (recdata); if (r>-1) {String data = new String (recdata), if (Data.trim (). Equals ("over")) {S.close ();} SYSTEM.OUT.PRINTLN ("reads the data sent to the client:" +data); Out.write ("This is the data that the server sends to the client:". GetBytes ()); Out.write (recdata);} else {System.out.println ("The data is read! "); S.close (); System.exit (0);//ss.close ();}}} catch (IOException e) {e.printstacktrace ();}}}The above service-side read data is blocked, if the client does not hav