0xmovses/main.go

## main.go
package main

import (
	"fmt"
	"log"
	"net/http"
	"os"

	"github.com/gorilla/websocket"
)

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

func reader(conn *websocket.Conn) {
	for {
		messageType, p, err := conn.ReadMessage()
		if err != nil {
			log.Println(err)
			return
		}

		log.Println(string(p))

		if err := conn.WriteMessage(messageType, p); err != nil {
			log.Println(err)
			return
		}
	}
}

func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Home Page")
}

func wsEndpoint(w http.ResponseWriter, r *http.Request) {
	//to allow cross origin requests
	upgrader.CheckOrigin = func(r *http.Request) bool { return true }
	ws, err := upgrader.Upgrade(w, r, nil)
	if err != nil {
		log.Println(err)
	}

	log.Println("Client Connected")
	reader(ws)
}

func setupRoutes() {
	http.HandleFunc("/", homePage)
	http.HandleFunc("/ws", wsEndpoint)
}

func main() {
	fmt.Fprintf(os.Stdout, "Starting Server...\n")
	setupRoutes()
	fmt.Fprintf(os.Stdout, "Server Started\n")
	log.Fatal(http.ListenAndServe(":8080", nil))
}

//---------------//
// for front-end test//
//-------------//

<html lang="en">

<head>
    <meta charset="utf-8">
    <title>________________</title>
    <meta name="description" content="________________">
    <meta name="author" content="________________">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="main.css">
</head>

<body>
    <h1>Titolo</h1>
    <p>Lorem ipsum...</p>


    <script>
			let socket = new WebSocket("ws://localhost:8080/ws")
			console.log("Attempting websocket connectio")

			socket.onopen = function(event) {
				console.log("Connected to websocket")
				socket.send("Hello from the client")
			}

			socket.onClose = (event) => {
				console.log("Socket Closed Connection", event)
			}

			socket.onError = (error) => {
				console.log("Socket Error", error)
			}
		</script>
</body>

</html>
	package main

	import (
	"fmt"
	"log"
	"net/http"
	"os"

	"github.com/gorilla/websocket"
	)

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

	func reader(conn *websocket.Conn) {
	for {
	messageType, p, err := conn.ReadMessage()
	if err != nil {
	log.Println(err)
	return
	}

	log.Println(string(p))

	if err := conn.WriteMessage(messageType, p); err != nil {
	log.Println(err)
	return
	}
	}
	}

	func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Home Page")
	}

	func wsEndpoint(w http.ResponseWriter, r *http.Request) {
	//to allow cross origin requests
	upgrader.CheckOrigin = func(r *http.Request) bool { return true }
	ws, err := upgrader.Upgrade(w, r, nil)
	if err != nil {
	log.Println(err)
	}

	log.Println("Client Connected")
	reader(ws)
	}

	func setupRoutes() {
	http.HandleFunc("/", homePage)
	http.HandleFunc("/ws", wsEndpoint)
	}

	func main() {
	fmt.Fprintf(os.Stdout, "Starting Server...\n")
	setupRoutes()
	fmt.Fprintf(os.Stdout, "Server Started\n")
	log.Fatal(http.ListenAndServe(":8080", nil))
	}

	//---------------//
	// for front-end test//
	//-------------//

	<html lang="en">

	<head>
	<meta charset="utf-8">
	<title>________________</title>
	<meta name="description" content="________________">
	<meta name="author" content="________________">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<link rel="stylesheet" href="main.css">
	</head>

	<body>
	<h1>Titolo</h1>
	<p>Lorem ipsum...</p>


	<script>
	let socket = new WebSocket("ws://localhost:8080/ws")
	console.log("Attempting websocket connectio")

	socket.onopen = function(event) {
	console.log("Connected to websocket")
	socket.send("Hello from the client")
	}

	socket.onClose = (event) => {
	console.log("Socket Closed Connection", event)
	}

	socket.onError = (error) => {
	console.log("Socket Error", error)
	}
	</script>
	</body>

	</html>