socket io tutorial

Basic Application of socket. io tutorial (2) socket. io tutorial Preface Socket. IO supports timely, bidirectional, and event-based communic

step will go to github to download npm files and progress, and the fourth step is to install npm to node. js will copy several cmd files and the mode_modules folder to the nodejs directory. In this way, npm is configured. If you need to install any modules, enter npm install ***. If there is no npm or windows users can use github to download socket. io and put it into the node_modules folder. For detailed

This article mainly introduces socket in node. io event Usage Details. For more information, see socket. the io class library can not only send messages to each other, but also send events to each other through the emit method of the socket port object. In the previous even

Use Socket. io to push messages in real time, and socket. io to push messages in real time. Project Background There is a social network module in a recently written project. You need to implement this function: when a user is liked, commented, or followed, the server needs to push a message to the user in real time. T

Introduction Java NiO, introduced from JDK1.4, provides a completely different way of working with standard IO. The NIO package (java.nio.*) introduces four key abstract data types that work together to address some of the problems in traditional I/O classes. 1, Buffer: It is a linear table structure that contains data and is used for reading and writing. It also provides a special class for I/O operations for memory-mapped files. 2, Charset: I

sent. indexOf (user) ===- 1) {return false;} socketIO. to (roomID ). emit ('msg ', user, msg) ;}); // room pagerouter. get ('/room/: roomid', function (req, res) {var roomID = req. params. roomID; // render page data (see views/room. harvard) res. render ('room ', {roomID: roomID, users: roomInfo [roomID]}) ;}); app. use ('/', router); server. listen (3000, function () {console. log ('server listening on port 3000 ');}); Client code Added chatapp/views/room. Harvard. Added chatapp/public/index

The Socket. IO instance in node. js, node. jssocket. io 1. Introduction First Socket. IO Official Website: http://socket.io The official website is very concise, and there is no API documentation. There is only one simple "How to use" for reference. Because

install npm-gfThe first one is that there is no prompt for the settings. The second step will go to github to download npm files and progress, and the fourth step is to install npm to node. js will copy several cmd files and the mode_modules folder to the nodejs directory.In this way, npm is configured.If you need to install any modules, enter npm install ***.If there is no npm or windows users can use github to download socket.

Node. js uses the socket. io method, node. jssocket. io You can use socket. io to create a socket. io server. However, this server depends on a created http server. After the http serve

Nodejs + Socket. io implement communication instance code, nodejssocket. io Directory structure D:. │ package.json │ server.js │ └─public index.html socket.io.js Required Conditions Socket. io. js is used to initialize io on th

, directly submit the command + user buffer to the kernel driver, and then return immediately. At this time, the user thread can continue to run and do other things. When you want to know the command completion status, you can use getqueuedcompletionstatus to obtain the completed request and data. Therefore, you can submit a large number of IO requests first, and then process and return them slowly. The reason why iocp is more efficient than epoll is

Node socket. io event Usage Details, nodesocket. io The socket. io class library can not only send messages to each other, but also send events to each other through the emit method of the socket port object. In the previous event

'); // open the Socket socket. onopen = function (event) {// send an initialization message socket. send ('I am the client and I \' m listening! '); // Listen to the message socket. onmessage = function (event) {console. log ('client received ed a message', event) ;}; // listen to the

How to Use socket. io and nodesocket. io in node express Server. js Code Copy codeThe Code is as follows:Var express = require ("express ");Var http = require ("http ");Var sio = require ("socket. io ");Var app = express ();Var server = http. createServer (app );Var fs = req

the room will receive a message. // note: In comparison with the above, here we will submit the event IO from the server perspective. sockets. in ('another room '). emit ('event _ name', data); // broadcast Io to all clients. sockets. emit ('event _ name', data ); In addition to broadcasting messages to a room, you can use the following APIs to obtain room information. // Obtain information about all room

Broadcast messages of socket. io in node. js, node. jssocket. io After multiple clients establish a connection with the server. the io () server has a sockets attribute. The attribute value is all socket objects connected to the client. you can use the send method or emit me

Android-Socket causes the Socket to close and cannot send and receive data after the IO stream is closed. androidio Use Socket to send data as an example: When sending data, declare: DataOutputStream OS = new DataOutputStream (socket. getOutputStream ()); Recently, I encount

for sending messages to the server.Use socket. io and nodejs to build a websocket Server Socket. io can not only build the websocket service of the client, but also support the websocket of the nodejs server.Install socket. io in

1.I/O Basic Knowledge 1.1What is a file descriptor? In a network, a socket object is a 1 file descriptor, and in a file, 1 file handles (that is, the files object) are 1 file descriptors. In fact, it can be understood as a "pointer" or "handle", pointing to 1 socket or file object, when the file or socket changes, the object corresponding to the document descript

(() => { socket.emit('random', Math.random())}, 500)socket.on('warn', count => { console.log('warning count: ' + count)})socket.on('disconnect', () => { clearInterval(interval)}) Transmission stream Socket. io can process streams Server code io.on('connection', function (socket) { let stream = ss.createStream() ss(socket