go-websocket

Golang Websockets

This project is a code exercise following Jacob Martin's article Practical Golang: Using websockets.

I like the article, because it shows a very minimal example of how to write a Golang application that allows a client to connect using websockets. There are only two source files doing all the work.

Dependencies

The websocket library used is the Gorilla WebSocket library. You can fetch this dependency by running:

go get github.com/gorilla/websocket

Running

To run this example, you can simply run the following:

go run main.go

Then navigate your browser to http://127.0.0.1:8000.

You should see a "Subscribe" button and a text area with "MyTextArea" already in the field.

When you press the "Subscribe" button you'll see the following eventually fill the text area:

MyTextArea
{"Name":"Bill","Age":0}
{"Name":"Bill","Age":2}
{"Name":"Bill","Age":4}
{"Name":"Bill","Age":6}
{"Name":"Bill","Age":8}
{"Name":"Bill","Age":10}
{"Name":"Bill","Age":12}
{"Name":"Bill","Age":14}
{"Name":"Bill","Age":16}
{"Name":"Bill","Age":18}
{"Name":"Bill","Age":20}
{"Name":"Bill","Age":22}
{"Name":"Bill","Age":24}
{"Name":"Bill","Age":26}
{"Name":"Bill","Age":28}
{"Name":"Bill","Age":30}
{"Name":"Bill","Age":32}
{"Name":"Bill","Age":34}
{"Name":"Bill","Age":36}
{"Name":"Bill","Age":38}
Connection closed

You'll also see the following logged in your terminal:

2017/02/17 17:33:37 Client subscribed
2017/02/17 17:34:19 Client unsubscribed

You can stop the server by pressing Ctrl+C in your terminal.

For more details explaining the code, please see Jacob Martin's article.