How to create a folder in Firebase Storage using Admin API - firebase

Question

Aim: to upload a file into a folder within Firebase Storage
E.g.
default_bucket/folder1/file1
default_bucket/folder1/file2
default_bucket/folder2/file3
Using Firebase client-side I am able to upload a file to a folder within Firebase Storage like this:
const storageRef = firebase.storage().ref();
const fileRef = storageRef.child(`${folder}/${filename}`);
const metadata = {
contentType: file.type,
customMetadata: { }
};
return fileRef.put(file, metadata);
If the folder does not exist, it get's created.
However I have not managed to do the same server-side using the Admin SDK.
The code below, uploads the file into the default bucket.
But, I want to upload the file into a named folder within the default bucket.
The client side makes a POST request to the GCF, sending the file and a folder name.
Busboy is used to extra the folder name and file and pass them to the upload function; which uploads the file, then returns a donwnload link for it.
index.js
const task = require('./tasks/upload-file-to-storage');
app.post('/upload', (req, res, next) => {
try {
let uploadedFilename;
let folder;
if (req.method === 'OPTIONS') {
optionsHelper.doOptions(res);
} else if (req.method === 'POST') {
res.set('Access-Control-Allow-Origin', '*');
const busboy = new Busboy({ headers: req.headers });
const uploads = [];
busboy.on('file', (fieldname, file, filename, encoding, mimetype) => {
uploadedFilename = `${folder}^${filename}`;
const filepath = path.join(os.tmpdir(), uploadedFilename);
uploads.push({ file: filepath, filename: filename, folder: folder });
file.pipe(fs.createWriteStream(filepath));
});
busboy.on('field', (fieldname, val) => {
if (fieldname === 'folder') {
folder = val;
}
});
busboy.on('finish', () => {
if (uploads.length === 0) {
res.end('no files found');
}
for (let i = 0; i < uploads.length; i++) {
const upload = uploads[i];
const file = upload.file;
task.uploadFile(helpers.fbAdmin, upload.folder, upload.file, uploadedFilename).then(downloadLink => {
res.write(`${downloadLink}\n`);
fs.unlinkSync(file);
res.end();
});
}
});
busboy.end(req.rawBody);
} else {
// Client error - only support POST
res.status(405).end();
}
} catch (e) {
console.error(e);
res.sendStatus(500);
}
});
const api = functions.https.onRequest(app);
module.exports = {
api
;
upload-file-to-storage.js
exports.uploadFile = (fbAdmin, folder, filepath, filename) => {
// get the bucket to upload to
const bucket = fbAdmin.storage().bucket(); //`venture-spec-sheet.appspot.com/${folder}`
const uuid = uuid();
// Uploads a local file to the bucket
return bucket
.upload(filepath, {
gzip: true,
metadata: {
//destination: `/${folder}/${filename}`,
cacheControl: 'public, max-age=31536000',
firebaseStorageDownloadTokens: uuid
}
})
.then(() => {
const d = new Date();
const expires = d.setFullYear(d.getFullYear() + 50);
// get file from the bucket
const myFile = fbAdmin
.storage()
.bucket()
.file(filename);
// generate a download link and return it
return myFile.getSignedUrl({ action: 'read', expires: expires }).then(urls => {
const signedUrl = urls[0];
return signedUrl;
});
});
};
I've tried a few things
Setting the bucket name to default and a folder. This resulted in a server error.
const bucket = fbAdmin.storage().bucket(`${defaultName}/${folder}`);
Setting the bucket name to the folder. This resulted in a server error.
const bucket = fbAdmin.storage().bucket(folder);
And, I've also tried using the destination property of uploadOptions.
But this still puts the file in the default bucket.
.upload(filepath, {
gzip: true,
metadata: {
destination: `${folder}/${filename}`, // and /${folder}/${filename}
}
})
Is it possible to upload to a folder using the Admin SDK?
E.g. I want to upload a file so that is is placed in a named "folder".
I.e. so I can reference the file at the path: bucket/folder/file.jpg
In the example below, each "folder" is named with a firebase key.

Answer 1

Found the problem.
I stupidly declared the destination option in the wrong place.
Instead of in the metadata object:
return bucket
.upload(filepath, {
gzip: true,
metadata: {
destination: `${folder}/${filename}`,
cacheControl: 'public, max-age=31536000',
firebaseStorageDownloadTokens: uuid
}
})
It should have been on the options object:
return bucket
.upload(filepath, {
gzip: true,
destination: `${folder}/${filename}`,
metadata: {
cacheControl: 'public, max-age=31536000',
firebaseStorageDownloadTokens: uuid
}
})
With this change made the file now gets uploaded into a named "folder".

Answer 2

There is a create folder option besides Upload File button for a bucket in Storage console.One can create folders in bucket and upload files to it on console. To create such folders in bucket using admin APIs, add folders before file reference. e.g.
const blob = bucket.file('folder1/folder2/' + req.file.originalname);