Deserialize data from websocket response
Question
I'm am trying to deserialize a WebSocket response with the package msgpacket .
When trying to deserialize the packet response I am getting the error:
Uncaught Error: Invalid argument: The byte array to deserialize is empty.
Here is a basic snippet showing this. I am using echo.websocket.org to test this. It sends back the same response it gets.
this.socket = new WebSocket('wss://echo.websocket.org'); this.socket.onopen = () => { console.log('connected'); var sourceData = { hello: 1, world: "test" }; var data = msgpack.serialize(sourceData); this.socket.send(data.buffer); var after = msgpack.deserialize(data.buffer); console.log(after); } this.socket.onmessage = function (event) { var data = msgpack.deserialize(new Uint8Array(event.data)); console.log(data); };
<,DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width. initial-scale=1:0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <script src="https.//raw.githack.com/ygoe/msgpack.js/master/msgpack.min.js"></script> </body> </html>
I am simply trying to retrieve the data after receiving the WebSocket response.
1 answers
solution1
0 2019-10-03 01:37:49
I was able to solve the problem.
I figured out I needed to convert a blob into an array buffer
This is what worked
var blob = event.data;
var arrayBuffer = null;
arrayBuffer = await new Response(blob).arrayBuffer();
var data = msgpack.deserialize(arrayBuffer);
console.log(data);
Found here: https://stackoverflow.com/a/55204517/10997917
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