Nodejs calling api updated data not refreshing - node.js

Question

Trying to figure out why my api data not refreshing in node. I'm using local node and express calling api which works fine.
The issue I'm have getting the data from the api using setInterval doesn't output the new data.
I will need to stop/restart nodemon app.js each time, to get the updated api data.
Here's my setup.
const app = express();
const port = 3000;
const path = require('path');
app.use(cors());
app.options('*', cors());
app.use(function (req, res, next) {
// Website you wish to allow to connect
res.setHeader('Access-Control-Allow-Origin', 'http://localhost:8888');
// Request methods you wish to allow
res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
// Request headers you wish to allow
res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
// Set to true if you need the website to include cookies in the requests sent
// to the API (e.g. in case you use sessions)
res.setHeader('Access-Control-Allow-Credentials', true);
// Pass to next layer of middleware
next();
});
async function getCandleTicks(interval) {
try {
const candles = await client.getTicks(
'stocktick', //
'symbol', //
);
app.get('/', (req, res) => {
console.log('load data');
res.send(candles);
});
// do something with the data
} catch (error) {
// handle the error
console.log('error', error);
}
}
//Calling api using set interval works but the data is the same when I refresh the browser. I need to stop and restart to see updated stock ticks
getCandleTicks('1m'); // Calling to get data the first time
var t = setInterval(function () {
getCandleTicks('1m'); // Doesn't reload data.
}, 6000);
app.listen(port, () => console.log(`Hello world app listening on port ${port}!`));

Answer 1

What you're doing is basically trying to reassign the function. Try to avoid it and instead have a variable that keeps changing and send the variable as such:
let candles = 0;
router.get('/', (req, res, next) => {
res.send({
candles
});
});
function updateCandles() {
candles += 1;
// recursive function, keep updating every second
setTimeout(updateCandles, 1000);
}
updateCandles();