Get Download URL from file uploaded with Cloud Functions for Firebase

**You should avoid harcoding URL prefix in your code, especially when there are alternatives**. I suggest using the option `predefinedAcl: 'publicRead'` when uploading a file with [Cloud Storage NodeJS 1.6.x][1] or +:

const options = {
destination: yourFileDestination,
predefinedAcl: 'publicRead'
};

bucket.upload(attachment, options);

Then, getting the public URL is as simple as:

bucket.upload(attachment, options).then(result => {
const file = result[0];
return file.getMetadata();
}).then(results => {
const metadata = results[0];
console.log('metadata=', metadata.mediaLink);
}).catch(error => {
console.error(error);
});


[1]:

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