nodejs+socket.io實現資料推送功能
阿新 • • 發佈：2019-02-04
1.安裝express
在資料夾mypro路徑下的cmd視窗執行“npm install express –save”
2.新增檔案app.js到mypro資料夾
/app.js var app = require('express')(); var http = require('http').Server(app); app.get('/', function(req, res){ res.send('<h1>Hello world</h1>'); }); http.listen(3000, function(){ console.log('listening on *:3000'); });
3.安裝socket.io
在上面的CMD視窗執行：“npm install –save socket.io”
4.新增index.html到mypro資料夾
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } body { font: 13px Helvetica, Arial; } form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; } form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; } form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; } #messages { list-style-type: none; margin: 0; padding: 0; } #messages li { padding: 5px 10px; } #messages li:nth-child(odd) { background: #eee; } </style> </head> <body> <ul id="messages"></ul> <form action=""> <input id="m" autocomplete="off" /><button>Send</button> </form> <script src="/socket.io/socket.io.js"></script> <script src="http://code.jquery.com/jquery-1.11.1.js"></script> <script> var socket = io(); $('form').submit(function(){ socket.emit('chat message', $('#m').val()); $('#m').val(''); return false; }); socket.on('chat message', function(msg){ $('#messages').append($('<li>').text(msg)); }); </script> </body> </html>
5.修改app.js
/** * Created by xl on 2017/2/21. */ var app = require('express')(); var http = require('http').Server(app); var io = require('socket.io')(http); app.get('/',function (req,res) { res.sendfile('index.html'); }); io.on('connection', function(socket){ console.log('a user connected'); socket.on('chat message', function(msg){ console.log('message: ' + msg); io.emit('chat message', msg); }); }); app.set('port', process.env.PORT || 3000); var server = http.listen(app.get('port'), function() { console.log('start at port:' + server.address().port); });
服務端如下所示：
