A simple example of using Websockets in Go with the Gorilla lib

app.go

package main

import (
	"fmt"
	"net/http"

	"github.com/gorilla/websocket"
)

var upgrader = websocket.Upgrader{}

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		http.ServeFile(w, r, "./static/index.html")
	})

	http.HandleFunc("/chat", func(w http.ResponseWriter, r *http.Request) {
		var conn, _ = upgrader.Upgrade(w, r, nil)
		go func(conn *websocket.Conn) {
			for {
				_, msg, _ := conn.ReadMessage()
				println(string(msg))
				res := mStruct{
					Name:    "Aaron",
					Message: fmt.Sprintf("%s back to you!", string(msg)),
				}
				println(string(res.Message))
				conn.WriteJSON(res)
			}
		}(conn)
	})

	http.ListenAndServe(":3000", nil)
}

type mStruct struct {
	Name    string `json:"name"`
	Message string `json:"message"`
}