Generate acces token when uploading file to firebase storage [duplicate] - node.js

Question

This question already has answers here:
Get Download URL from file uploaded with Cloud Functions for Firebase
(25 answers)
Closed 1 year ago.
I am experimenting with Firebase cloud functions and PDFs. I would like to send a PDF via email and save the Access token in Firebase database. My cloudfunctions looks like current code:
exports.invoice = functions
.https
.onRequest( (req, res) => {
const myPdfFile = admin.storage().bucket().file('/test/Arbeitsvertrag-2.pdf');
const doc = new pdfkit({ margin: 50 });
const stream = doc.pipe(myPdfFile.createWriteStream());
doc.fontSize(25).text('Test 4 PDF!', 100, 100);
doc.end();
return res.send('Arbeitsvertrag-2.pdf');
});
Via this code a PDF is stored in firebase storage.
Only no access token is created. Is there any way to do this by default?

Answer 1

you can do this as well to get download url and include the url in the email.
If your file is already exists in firebase storage and you want to get the public url
const bucket = admin.storage().bucket();
const fileInStorage = bucket.file(uploadPath);
const [fileExists] = await fileInStorage.exists();
if (fileExists) {
const [metadata, response] = await fileInStorage.getMetadata();
return metadata.mediaLink;
}
If you want to upload the file and same time get download url
const bucket = admin.storage().bucket();
// create a temp file to upload to storage
const tempLocalFile = path.join(os.tmpdir(), fileName);
const wstream = fs.createWriteStream(tempLocalFile);
wstream.write(buffer);
wstream.end();
// upload file to storage and make it public + creating download token
const [file, meta] = await bucket.upload(tempLocalFile, {
destination: uploadPath,
resumable: false,
public: true,
metadata: {
contentType: 'image/png',
metadata: {
firebaseStorageDownloadTokens: uuidV4(),
},
},
});
//delete temp file
fs.unlinkSync(tempLocalFile);
return meta.mediaLink;