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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | 1x 1x 1x 1x 1x | // Google Cloud Storage helpers (upload + signed download URL).
// Authenticates automatically via GOOGLE_APPLICATION_CREDENTIALS.
const { Storage } = require('@google-cloud/storage');
const moment = require('moment');
const config = require('../config');
const storage = new Storage({ projectId: config.projectId });
// Part IV - Store the zip in GCS with the given object name.
function uploadBuffer(objectName, buffer, contentType) {
const file = storage.bucket(config.storageBucket).file(objectName);
const stream = file.createWriteStream({
metadata: {
contentType,
cacheControl: 'private'
},
resumable: false
});
return new Promise((resolve, reject) => {
stream.on('error', err => {
reject(err);
});
stream.on('finish', () => {
resolve('Ok');
});
stream.end(buffer);
});
}
// Part V - Generate a temporary (2 days) signed download URL for the zip.
async function getDownloadUrl(objectName) {
const options = {
action: 'read',
expires: moment().add(2, 'days').unix() * 1000
};
const signedUrls = await storage
.bucket(config.storageBucket)
.file(objectName)
.getSignedUrl(options);
return signedUrls[0];
}
module.exports = {
uploadBuffer,
getDownloadUrl
};
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