fyers-api-v2/socketWrapper/socketWrapper.js

Fyers data.

const WebSocket = require('ws');
const errorHandler = require('../errorHandler/errorHandler')


let reconnectedValue = 0;

function webSocketWrapper(url, dataToSubscribe,  subscribeFun) {
    const pingFrequency = 6000;
    const maxReconnectTimes = 10;
    let isAlive = false


    const ws = new WebSocket(url);
    ws.binaryType = 'arraybuffer';
    ws.on('open', function open() {
        console.log('connected');
        ws.send(dataToSubscribe)
        ws.send(JSON.stringify('ping'))

    });
    ws.on('error', function open(e) {
        console.log('error', new errorHandler(e).getError(e));
    });

    ws.on('closed', function open(e) {
        console.log('onclosed', new errorHandler(e).getError(e));

    });

    ws.onmessage=(res)=> {
        if ((typeof res.data === "string") && res.data.includes('pong')) {
            isAlive = true
            return
        }else {
            subscribeFun(res)
        }

    }


    let interValInstant = setInterval(() => {
        if (isAlive === false) {
            console.log('trying to reconnect', reconnectedValue)
            reconnectedValue++;
            clearInterval(interValInstant)
            if (reconnectedValue <= maxReconnectTimes) {
               webSocketWrapper(url, dataToSubscribe, subscribeFun)
            } else {
                console.log("Error : Connection Error Please not able to connect to socket")
            }
        } else {
            isAlive = false
            reconnectedValue = 0
            ws.send(JSON.stringify('ping'))
        }
    }, pingFrequency);

    return ws;

}


module.exports = webSocketWrapper