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Building Scalable Apps with Redis and Node.js by Joshua Johanan

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Using Socket.IO and Express together

We previously created an Express application. This application is just the foundation. We are going to add features until it is a fully usable app. We currently can serve web pages and respond to HTTP, but now we want to add real-time communication. It's very fortunate that we just spent most of this chapter learning about Socket.IO; it does just that! Let's see how we are going to integrate Socket.IO with an Express application.

We are going to use Express and Socket.IO side by side. As I mentioned before, Socket.IO does not use HTTP like a web application. It is event based, not request based. This means that Socket.IO will not interfere with Express routes that we have set up, and that's a good thing. The ...

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