This is basically the code from this awesome video from TutorialEdge. This is how I finally got a WebSockets Hello World working on my local machine, after several blog posts topping big G's search results failed to deliver. (No pointing fingers...)
This code works, and deployment is easy. But I won't assume it's obvious. Instead, I'll be explicit. 🤓😄 Here goes:
Clone this repository and then navigate to it with two seperate terminals. (Yes, I know you can run a process in the background, hush.) You need to have Golang installed already, and also do a go get github.com/gorilla/websocket if you haven't yet. You need Python installed to serve the index.html. Yes, you could do this in other ways, but why not give Python some action.
In Terminal A, run go run main.go. In Terminal B, run python -m SimpleHTTPServer 9876. Then go to your browser and navigate to localhost:9876 (which is of course uses a number I just happened to choose). Nothing's on the main screen in the browser (cuz this is a minimal example), but open up the console to see "Hello World from the client!" echoed back from the server. In Terminal A, you can also see this in the logs.
WebSockets are an awesome solution for modern apps that want a bidirectional event stream between client and server. And of course, the first step to getting a technology integrated in your app is successfully compiling and running a minimal working example of that technology. So hope this helps. Cheers!