socket emit

Socket series What is socket and socket Series1. What is socket?Socket is the intermediate abstraction layer for communications between the application layer and the TCP/IP protocol family. It is a group of interfaces that the application layer can send and receive data by c

continuously sends a random number. When the random number is greater than 0.95, the server sends a warning and warning message to the client after one second delay. Server code let server = require('http').Server() let io = require('socket.io')(server)server.listen(3000); io.on('connection', socket => { socket.on('random', value => { console.log(value) if (value > 0.95) { if (typeof socket.warning === 'undefined') socket.warning = 0 setTimeout(()

[CPP] View plain copy/*user:lixiujie * date:20101207 *desc:unix (Linux) non-blocking socket communication Epoll model, multiplexing, TCP server-side, sends response information to the client. *file:tcp_server_epoll.c *system:ubuntu64bit * gcctcp_server_epoll.c-otcp_server_epoll *tcp_server_epoll7878 * epoll Function Introduction Epoll is an improved poll of the Linux kernel to handle large batches of handles and is an enhanced version of the select

Node. js Web application framework, which is often used when building HTTP servers. Therefore, it is explained directly using Socket. IO and express as examples. Copy codeThe Code is as follows:Var express = require ('express '), App = express (), Server = require ('http'). createServer (app), Io = require ('socket. io '). listen (server );Server. listen (3001 ); If you do not use express, see

, Therefore, the execution of the server application is suspended while waiting for a connection from the client. The application receives a string from the client, Displays the string in the console, and then echoes the string back to the client. The string from the client must contain the string "To emit a signal that indicates the end of the message. C# Copy Code Using System; Using System.Net; Using System.Net.Sockets; Using System.Text;

request from read () and processes the client's requests. During this time the client invokes read () to block waiting for a reply from the server, and the server calls write () to send the processing result back to the client, call read () again to block for the next request, and the client receives a return from read (), sends the next request, and loops through it. If the client does not have more requests, call Close () to turn off the connection, as if the write-end pipe is closed, the se

socket. Therefore, the execution of the server application is suspended while waiting for a connection from the client. The application receives a string from the client, Display the string in the console, and then echo the string back to the client. The string from the client must contain the string "To emit a signal that indicates the end of the message. C# Copy Code Using System; Using System.N

have not studied it carefully. I understand callback quickly and I will first use the callback function for processing. The last is the most critical communication phase. The background code of the socket. io module is as follows: Var io = require ('socket. io '). listen (server); // socket io module // WebSocket connection listening io. on ('connection', func

Image Description of the SOCKET protocol The original meaning of socket is "hole" or "socket ". Here we use the 4bds UNIX Process Information mechanism, take the latter meaning. Socket is very similar to a telephone outlet. Take a national-level telephone network as an example. The two sides of a telephone call are equ

Java (Socket programming basics), socket programming BasicsI,Two main problems in Network Programming One is how to accurately locate one or more hosts on the network, and the other is how to transmit data reliably and efficiently after finding the hosts. In TCP/IP, the IP layer is mainly responsible for locating network hosts and routing data transmission. The IP address can uniquely identify a host on the

Tags: web ack ipv6 address Port pen Linux description type. com"Everything is socket!. ”Although the words are slightly exaggerated, but the fact is, the current network programming is almost all using the socket.--Thoughts on practical programming and open source project research.We know the value of the exchange of information, how the process of communication between the network, such as when we open the

clients. All broadcasts and communication in the room will not affect clients outside the room. In this article, we know that socket. join ('room name') can be used by the client to enter the room, and socket. leave ('room name') is used to leave the room. When the client enters a room, you can broadcast messages in the room in the following two ways: The Code is as follows: // 1. broadcast an event to my

{alert ('The browser does not support WebSocket ~ ');} Currently, browsers such as chrome and firefox support websocket, but IE does not. Next, let's briefly talk about the server's support for websocket. The server supports many websocket languages and has related open-source projects, such as php phpwebsockets: http://code.google.com/p/phpwebsockets/, Java's jwebsocket:http://jwebsocket.org /.For more information, see this article: Start Using HTML5 WebSockets Today.Socket. io

processes running on different machines communicate with each other by sending messages to the socket. Each process is like a house, and the socket of the process is a door . sockets are the door between the application process and TCP , and application developers can control everything on the application layer of the socket, but cannot control the side of the

PHP Socket Communication Demo and socket operation class, Phpsocket 　　 Ready to do the Java course design, an address book. Adopt C/S architecture. The client uses Java FX and Java, server side with PHP, socket communication. Here's a talk about the socket for PHP: 　　Before you speak , you have to talk about TCP/IP,U

In-depth explanation: the socket communication principle and socket communication principle of php Are you familiar with TCP/IP, UDP, and Socket programming? With the development of network technology, these words are filled with our ears. So I want to ask: 1. What are TCP/IP and UDP? 2. Where is the Socket? 3. What is

Sockets are used for real-time communication between the browser and the server. In the past, regular polling was often used to simulate real-time communication, but this undoubtedly increased the pressure on the server.Here are some uses of the collected Socket.io:Service-Side SectionIo.on (' connection ',function(socket)); // listen to the client connection, the callback function will pass the connection socket