websocket with binary data doesn't seem to work

[anttilehtonen]

Hello,
I try to send array buffers over the socket to react-native client.
In Android emulator this works but in Windows emulator it doesn't work but it closes the socket.
I am using "react-native-windows": "^0.42.0-rc.5" and application has been created with 'react-native init websockettest' command.
I am using Node JS ws module to implement simple server.
Attached are zip files for client code without ios, android and windows folders and server side code.

console.log prints error when I send array buffer from the server and connection closes.
In Android the same code works as expected.

snippet of console.log:

In Windows:
1489057053027 "opened"
1489057053030 "message" "hello from server"
1489057053033 "error" WebSocketEvent {type: "error", target: WebSocket, currentTarget: WebSocket, eventPhase: 2, bubbles: false…}
1489057053036 "closed"

In Android:
1489056911160 "opened"
1489056911223 "message" "hello from server"
1489056911228 "message" ArrayBuffer {}

server side code:

const WebSocket = require('ws');

const wss = new WebSocket.Server({ port: 3141 });

wss.on('connection', function connection(ws) {
console.log((new Date()).getTime(), 'connected');
ws.on('message', function incoming(message) {
console.log('received message react-native', message);
});
ws.send('hello from server');

const buf = new ArrayBuffer(400);
const a = new Uint8Array(buf);
for(let i=0; i<a.length; i++) a[i] = i % 256;
ws.send(buf);

});

client side code:

const start = () => {
const socket = new WebSocket('ws://a.b.c.d:3141');
socket.binaryType = 'arraybuffer';

socket.addEventListener('message', (message) => {
console.log((new Date()).getTime(), 'message', message.data);
});
socket.addEventListener('open', (event) => {
console.log((new Date()).getTime(), 'opened');
});
socket.addEventListener('close', (event) => {
console.log((new Date()).getTime(), 'closed');
});
socket.addEventListener('error', (error) => {
console.log((new Date()).getTime(), 'error', error);
});
}

export default start;

websockettest.zip
websocketserver.zip

[rozele]

Thanks for filing @anttilehtonen. Can you try the fix in PR #1067 and let me know if that solves the problem?

[anttilehtonen]

Thanks for quick fixing! It seems to work, even in my more complex use case.
Any idea when we get official fix?

[anttilehtonen]

@rozele Thanks for quick fixing! It seems to work, even in my more complex use case.
Any idea when we get official fix?

[matthargett]

Fixed in #1067. I'll cherry pick to 42-stable branch and publish it there, then publish it in a new 43-stable package as well.