main.go

package main

import (
	"fmt"
	"time"

	"github.com/gorilla/websocket"
)

func main() {
	URL := "ws://echo.websocket.org/"

	var dialer *websocket.Dialer

	conn, _, err := dialer.Dial(URL, nil)
	if err != nil {
		fmt.Println(err)
		return
	}

	go timeWriter(conn)

	for {
		_, message, err := conn.ReadMessage()
		if err != nil {
			fmt.Println("read:", err)
			return
		}

		fmt.Printf("received: %s\n", message)
	}
}

func timeWriter(conn *websocket.Conn) {
	for {
		time.Sleep(time.Second * 2)
		conn.WriteMessage(websocket.TextMessage, []byte(time.Now().Format("2006-01-02 15:04:05")))
	}
}

How to add Client.crt and Client.key to this piece of code as I need to connect to an existing TLS1.2 websocket (wss (selfsigned))
My existing websocket is from NODE.JS server.

You Can check My Node.js server code:

==========================================================
var express = require('express');
var app = express();
var fs = require('fs');
/var expressWs = require('express-ws')(app);/
var port = process.env.port || 1995;
var https = require('https');

var serverKey = fs.readFileSync('cert/server.key', 'utf8');
var serverCrt = fs.readFileSync('cert/server.crt', 'utf8');
var credentials = {key: serverKey, cert: serverCrt};
var httpsServer = https.createServer(credentials, app);

app.use(function (req, res, next) {
console.log('middleware');
req.testing = 'testing';
return next();
});

app.get('/', function(req, res, next){
console.log('get route', req.testing);
res.end();
});

var WebSocketServer = require('ws').Server;
var wss = new WebSocketServer({
server: httpsServer
});

wss.on('connection', function connection(ws) {
  ws.on('message', function incoming(message) {
    console.log('received: %s', message);
  });

  ws.send('something');
});

httpsServer.listen(port,function(err){
console.log("College Server is running on: "+port);
});

============================================================