redirect after client.on('authenticated')

[ademir10]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

After to generate the QRcode or even already authenticated i can't make a redirect after client.initialize(), because i receive this message error:
node:_http_outgoing:696
throw new ERR_HTTP_HEADERS_SENT('set');
Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

Expected behavior

after to authenticated, be redirected to other page

Steps to Reproduce the Bug or Issue

//Async basic function requested by front-end:
gerar_qrcode: async function (req, res) {
const QRcode = require('qrcode');
client.on('qr', (qr) => {
const url = qr;
QRcode.toDataURL(url, (err, qrCodeUrl) => {
if (err) {
return console.log('erro ' + err);
}
return res.view({ qr_gerado: qrCodeUrl });
})
//if Authenticated redirect my front-end to the page called home:
}).on('authenticated', () => {
console.log('User Authenticated!');
return res.redirect('/pages/home');
});
client.initialize();
},

Relevant Code

//Full error message:
User Authenticated!
node:_http_outgoing:696
throw new ERR_HTTP_HEADERS_SENT('set');
^

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
at ServerResponse.setHeader (node:_http_outgoing:696:11)
at ServerResponse.header (/Users/ademir/apps/logchat/node_modules/express/lib/response.js:776:10)
at ServerResponse.location (/Users/ademir/apps/logchat/node_modules/express/lib/response.js:893:15)
at ServerResponse.redirect (/Users/ademir/apps/logchat/node_modules/express/lib/response.js:931:18)
at Client. (/Users/ademir/apps/logchat/api/controllers/PagesController.js:294:18)
at Client.emit (node:events:515:28)
at Client.initialize (/Users/ademir/apps/logchat/node_modules/whatsapp-web.js/src/Client.js:707:14)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
code: 'ERR_HTTP_HEADERS_SENT'
}

Node.js v21.0.0
[nodemon] app crashed - waiting for file changes before starting...

Browser Type

Chromium

WhatsApp Account Type

WhatsApp Business

Does your WhatsApp account have multidevice enabled?

No, I am not using Multi Device

Environment

OS: Mac
"node": "^21.0.0",
"whatsapp-web.js": "^1.23.0",

Additional context

there is some other way to check if client is authenticated?
thank you guys! i just posted it here because the Official WWebJS Discord Server is not working.

[alechkos]

Check your code

[ademir10]

Check your code

thank you for your help my dear friend! could you help me with this code? i'm trying to do it but i still not did it work as expected..

any suggestion? please..