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1. Steps 1.1) <code>Run</code> server.js <img src="https://i.stack.imgur.com/ttyrB.png" alt="enter image description here"> The cloud 9 console shows up: <img src="https://i.stack.imgur.com/vBVch.png" alt="enter image description here"> 1.2) Hit <code>Preview</code> on index.html <img src="https://i.stack.imgur.com/Vl4tF.png" alt="enter image description here"> 1.3) Then a window is opening on the right side of your IDE. You can either hit the button in the middle of the navigation bar or copy and paste the url into a new browser window. <img src="https://i.stack.imgur.com/ZtlFo.png" alt="enter image description here"> 1.4) Socket communication is working! <img src="https://i.stack.imgur.com/Fx1qs.png" alt="enter image description here"> <img src="https://i.stack.imgur.com/raHrg.png" alt="enter image description here"> 2. Prerequisite 2.1) node module socket.io Hit <code>F6</code> or <code>View -> Console</code> and install socket.io. <img src="https://i.stack.imgur.com/orSc8.png" alt="enter image description here"> 2.2) the client side JavaScript from socket.io Since I didn't find an official link to download it, I created a GitHubGist. <a href="https://gist.github.com/MatthiasHoldorf/7957556" rel="noreferrer">socket.io.js</a> 3. Code server.js <pre><code>// module dependencies var http = require("http"), sio = require("socket.io"); // create http server var server = http.createServer().listen(process.env.PORT, process.env.IP), // create socket server io = sio.listen(server); // set socket.io debugging io.set('log level', 1); io.sockets.on('connection', function (socket) { socket.emit('news', { message: 'Hello world!' }); socket.on('my other event', function (data) { console.log(data.message); }); }); </code></pre> index.html <pre><code><!DOCTYPE html> <html> <script src="js/socket.io.js"></script> <script> var socket = io.connect("https://demo-project-c9-matthiasholdorf.c9.io"); socket.on("news", function(data) { console.log(data.message); }); socket.emit("my other event", { message : "client emit" } ); </script> </html> </code></pre>
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1. PONode.js and socket.io don't work on Cloud9 IDE
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1. USMatthias Holdorf
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1. CODid you manually create a static file "socket.io.js" under project folder /js? But I learned that, once a node server containing socket.io.js starts, the file "socket.io.js" would be magically created under folder /socket.io. Though I don't know the exact mechanism.
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2. COYes, I did. But you are right, there is indeed a builder for the client side JavaScript in the socket.io node module. You should be able to address the client side JavaScript from socket.io through [this](https://github.com/LearnBoost/socket.io/blob/master/client/socket.io.js) path. It didn't work for me in the hurry, so I went with a static file.
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