Error: socket hang up

[pepe95270]

Hello all,
I get an issue when simply trying to connect to a server via WebSocket.
Here is my code:

const WebSocket = require('ws');
const ws = new WebSocket('http://172.21.178.165:8080');

ws.on('open', function open() {
  ws.send('Start video HoloLens');
});

And I get

Error: socket hang up
at createHangUpError (_http_client.js:331:15)
at Socket.socketOnEnd (_http_client.js:423:23)
at emitNone (events.js:111:20)
at Socket.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1055:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickCallback (internal/process/next_tick.js:180:9)

If I try connecting to the same address with Chrome and socket.io, it works well:

<script src="/socket.io.js"></script>
<script>var socket = io.connect('http://172.21.178.165:8080');</script>

I've attached the result of this connection, you can see that it is working as expected.

Someone has an idea why I get this socket hang up error?

I also tried using this library to have a websocket client but I get a similar error, so I guess I've done something wrong or it's the fault of the library used under the hood to send the initial request or other request that is buggy? Any suggestion is very appreciated :)

NodeJS version 8.9.4
ws version 5.2.0
(request version 2.85.0)
OS: Windows 10

Thanks,
Pierre

[lpinca]

You are not connecting to the same path, look at the url in your screenshot and the url you used in the WebSocket constructor, they are not the same.

Also using plain WebSocket to talk with a Socket.IO server does not work seamlessly.