How to Implement WebSockets in Go

Web
2026-04-17T12:05:42+00:00
Implement WebSockets in Go by using the gorilla/websocket package to upgrade HTTP connections and handle bidirectional data streams.

Use the golang.org/x/net/websocket package to handle WebSocket connections in Go.

package main

import (
	"log"
	"net/http"
	"github.com/gorilla/websocket"
)

var upgrader = websocket.Upgrader{
	ReadBufferSize:  1024,
	WriteBufferSize: 1024,
}

func handler(w http.ResponseWriter, r *http.Request) {
	conn, err := upgrader.Upgrade(w, r, nil)
	if err != nil {
		log.Println(err)
		return
	}
	defer conn.Close()
	for {
		_, message, err := conn.ReadMessage()
		if err != nil {
			break
		}
		log.Printf("recv: %s", message)
		err = conn.WriteMessage(websocket.TextMessage, message)
		if err != nil {
			break
		}
	}
}

func main() {
	http.HandleFunc("/ws", handler)
	http.ListenAndServe(":8080", nil)
}