Created
July 24, 2017 18:02
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Hello World - Sockets - HTTPS Load Balancer - Nodejs - Sticky Sessions
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| { | |
| "name": "hello-sockets", | |
| "version": "0.0.1", | |
| "private": true, | |
| "dependencies": { | |
| "express": "~4.15.3", | |
| "socket.io": "~2.0.3" | |
| }, | |
| "engines": { | |
| "node": "4.7.2" | |
| } | |
| } |
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| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <h2>Socket Log</h2> | |
| <div id="log"> | |
| </div> | |
| <script src="/socket.io/socket.io.js"></script> | |
| <script> | |
| var startTime = Date.now(); | |
| var host = { name: "", randomNumber: ""}; | |
| var socket = io(); | |
| socket.on("connect",function onConnect () { console.log("Connect", arguments); }); | |
| socket.on("ack", function onAck(data) { | |
| if (host.name.length == 0) { | |
| host.name = data.host; | |
| host.randomNumber = data.randomNumber; | |
| } | |
| if (host.name != data.host || host.randomNumber != data.randomNumber) { | |
| var endTime = Date.now(); | |
| alert("No longer talking to same VM"); | |
| alert("No longer session affinity after " + (endTime - startTime) + " ms"); | |
| console.error(startTime, endTime, (endTime - startTime)); | |
| } else { | |
| document.getElementById("log").innerHTML += [ | |
| "<p>", | |
| "<b>Host: </b>" + data.host, | |
| "<b>Random Number: </b>" + data.randomNumber, | |
| "<b>Timestamp: </b>" + Date.now(), | |
| "</p>" | |
| ].join("\n"); | |
| } | |
| }); | |
| socket.on("disconnect", function onDisconnect () {console.log("disconnect", arguments); }); | |
| var randomNumber = Math.random() * 10000; | |
| setInterval(function sendMessages() { | |
| socket.emit("ack", { | |
| "randomNumber": randomNumber | |
| }); | |
| }, 5000); | |
| </script> | |
| </body> | |
| </html> |
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| const express = require("express"); | |
| const app = express(); | |
| const http = require("http").Server(app); | |
| const io = require("socket.io")(http); | |
| const port = 80; | |
| http.listen(port, () => { | |
| console.log("Server listening on port %d", port); | |
| }); | |
| app.use(express.static(__dirname + "/public")); | |
| "version": "2.0.3", | |
| io.on("connection", (socket) => { | |
| console.log("Connection established", socket.handshake.address); | |
| var randomNumber = Math.random(); | |
| socket.on("ack", (data) => { | |
| console.log("Received ack", data); | |
| socket.emit("ack", { | |
| host: "instance1", | |
| randomNumber: randomNumber, | |
| originalData: data | |
| }); | |
| }); | |
| }); |
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