Not able to connect socket server using angular 6

[bhaveshvavdiya]

I am using erl9.3 and angular 6 with ([email protected])

When I call

this.socket = io.connect('localhost:3000');

I get below data in erlang server using below code

	case gen_tcp:recv(Sock, 0) of 
		{ok, Data} ->
			io:format("recv!~n"),
			case handle_request(Sock, Data) of
				ok ->
					io:format("~p",[Data]),
					sock_loop(Sock);
				exit ->
					exit(normal)
			end;
		{error, Why} ->
			error(Why)
	end.

GET / HTTP/1.1\r\n
Host: localhost:4001\r\n
Connection: Upgrade\r\n
Pragma: no-cache\r\n
Cache-Control: no-cache\r\n
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36\r\n
Upgrade: websocket\r\n
Origin: http://localhost:4200\r\nSec-WebSocket-Version: 13\r\n
Accept-Encoding: gzip, deflate, br\r\n
Accept-Language: en-US,en;q=0.9\r\n
Cookie: ga=GA1.1.1506806518.1546498546; io=uJqwysezr_yBH-aAAAj\r\n
Sec-WebSocket-Key: vwbgM9H5sh0z1irkN8Ugyg==\r\n
Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n

After that nothing happens. Even not fire 'connect' callback at Angular site.

[ferd]

This repository is unmaintained and is not compatible with any recent socket.io version, only very old ones before the thing had turned to a kind of framework.

[bhaveshvavdiya]

I read the document at below link & also tried socket.io 0.6, 0.7 & 0.9
http://marcelog.github.io/articles/erlang_websocket_server_cowboy_tutorial.html

Still, it is not working for me.