Only getting Blob with different sizes in Websocket

marsonya

Hi, I am able to successfully connect to the Websocket and receiving text messages.
But, I am not getting ticks properly. I am continuously (more than a few times in a second) getting the following message that the parser is not able to parse:

data: Blob {
size: 560 // this keeps changing
type: ""
}

marsonya

I am not using any client directly. I have copied the Parser from NodeJS NPM Client.

onMessage: (message) => {
console.log(message);
this.connected = true;
if(message.data instanceof ArrayBuffer) {
console.log(message.data.byteLength)
if(message.data.byteLength > 2) {
const parsedData = this.parseBinary(message.data);
this.updatePrices(parsedData);
console.log('binary message', parsedData);
}
}else {
const parsedText = this.parseTextMessage(message.data)
if(parsedText) {
console.log('text message', parsedText);
}
}
}


The code is not passing "if(message.data instanceof ArrayBuffer) {"

marsonya

@sujith , please help me

sujith

The tick data is in binary. You can read more about it from the API documentation.

marsonya

@sujith I understand that. And I am following the exact thing written in Kite NPM Package
https://github.com/zerodha/kiteconnectjs/blob/master/lib/ticker.ts#L400

The problem is message.data is coming as undefined.

But I am getting empty Blob messages. I would really appreciate if you can nudge me in the right direction.

marsonya

Issue resolved. I had to convert the Blob data to Array buffer using const buffer = await blob.arrayBuffer();
Thanks