I have a node/express route that collects information via url parameters. I use these parameters to initiate a separate function which takes a few seconds. I am trying async/await to wait for the function to return data but the route logic just plows ahead, not waiting for anything.
Is this a syntax/structure problem? Any tips are welcome as I seem to have hit a wall. Thanks!
app.get('/testlogin', (req, res) => {
(async () => {
// This needs to wait until loginToApp returns data but it does not
await loginToApp(req.query.u, req.query.p)
.then((data) => {
console.log('from testlogin route. This should print after loginToApp');
console.log(data); // the returned data
});
})();
});
async function loginToApp(user, pwd) {
(async () => {
setTimeout(() => {
const data = { temp: 1, rtemp: 2 };
console.log('from loginToApp');
console.log(data);
return data;
}, 2000);
})();
}
Your loginToApp function needs to return a Promise for you to await. If using a setTimeout, then you'll have to explicitly wrap it in a new Promise.
app.get('/testlogin', async (req, res) => {
const data = await loginToApp(req.query.u, req.query.p);
console.log(data);
});
async function loginToApp(user, pwd) {
return new Promise(res => {
setTimeout(() => {
const data = { temp: 1, rtemp: 2 };
console.log('from loginToApp');
console.log(data);
res(data);
}, 2000);
})
}