Simple example of Server Send Events By Steren Giannini for Paris JS
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December 16, 2015 14:49
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| var express = require('express'); | |
| var fs = require('fs'); | |
| var app = express(); | |
| app.use(express.urlencoded()); | |
| var EventEmitter = require('events').EventEmitter; | |
| var emitter = new EventEmitter(); | |
| app.get('/', function(req, res) { | |
| fs.readFile(__dirname + '/index.html', 'utf8', function(err, content){ | |
| res.send(content); | |
| }); | |
| }); | |
| app.get('/message', function(req, res) { | |
| console.log("received message: " + req.param('content')); | |
| emitter.emit("getmessage", req.param('content')); | |
| res.send(true); | |
| }); | |
| var index = 0; | |
| app.get('/stream', function(req, res) { | |
| res.setHeader("Content-Type", 'text/event-stream'); | |
| res.setHeader("Cache-Control", "no-cache"); | |
| res.setHeader("Connection", "keep-alive"); | |
| res.writeHead(200); | |
| res.write(":\n"); | |
| emitter.on("getmessage", function(data) { | |
| res.write("data: " + JSON.stringify(data)+ "\n"); | |
| res.write("id: " + index + "\n\n"); | |
| index++; | |
| }); | |
| }); | |
| app.listen(3000); | |
| console.log('Listening on port 3000'); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <p>SSE</p> | |
| <script> | |
| document.body.innerHTML += "Demo"; | |
| var source = new EventSource('/stream'); | |
| source.addEventListener('message', function(e) { | |
| console.log(e.data); | |
| var data = JSON.parse(e.data); | |
| document.body.innerHTML += data + '<br>'; | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
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| { | |
| "name": "sse-demo", | |
| "version": "0.0.1", | |
| "private": true, | |
| "dependencies": { | |
| "express": ">= 3.0" | |
| }, | |
| "engines": { | |
| "node": "*" | |
| }, | |
| "author": "Steren Giannini <[email protected]>", | |
| "description": "Very simple demo for server sent events", | |
| "repository": { | |
| "url": "" | |
| }, | |
| "main": "apps.js" | |
| } |
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