Storing Image and Video Files in Cloud Storage

cloudstorage.js

'use strict';

const Storage = require('@google-cloud/storage');
const config = require('../config');

const GCLOUD_BUCKET = config.get('GCLOUD_BUCKET');

const storage = Storage({
  projectId: config.get('GCLOUD_PROJECT')
});
const bucket = storage.bucket(GCLOUD_BUCKET);

function sendUploadToGCS(req, res, next) {
    if (!req.file) {
        return next();
      }
    
      const oname = Date.now() + req.file.originalname;
      const file = bucket.file(oname);
    
      const stream = file.createWriteStream({
        metadata: {
          contentType: req.file.mimetype
        }
      });
    
      stream.on('error', (err) => {
        req.file.cloudStorageError = err;
        next(err);
      });
    
      stream.on('finish', () => {
        file.makePublic().then(() => {
          req.file.cloudStoragePublicUrl = `https://storage.googleapis.com/${GCLOUD_BUCKET}/${oname}`;
          next();
        });
      });
    
      stream.end(req.file.buffer);
}

// Multer handles parsing multipart/form-data requests.
// This instance is configured to store images in memory.
// This makes it straightforward to upload to Cloud Storage.
const Multer = require('multer');
const multer = Multer({
  storage: Multer.MemoryStorage,
  limits: {
    fileSize: 40 * 1024 * 1024 // no larger than 40mb
  }
});

module.exports = {
  sendUploadToGCS,
  multer
};