How to Build a Concurrent Chat App With Go and WebSockets

Go emerged from Google out of a need to build highly performant applications using an easy-to-understand syntax. It's a statically typed, compiled language developed by some of C's innovators, without the programming burden of manual memory management. Primarily, it was designed to take advantage of modern multicore CPUs and networked machines.

In this post, I'll demonstrate the capabilities of Go. We'll take advantage of Go's ability to create concurrent apps to build a chat app easily. On the backend, we'll use Redis as the intermediary to accept messages from the browser and send them to the subscribed clients. On the frontend, we'll use WebSockets via socket.io to facilitate client-side communication. We'll deploy it all on Heroku, a PaaS provider that makes it easy to deploy and host your apps. Just as Go makes programming such an application simple, Heroku makes it easy to supplement it with additional infrastructure.

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