Multer-Storage-GCS

Google Cloud Storage Multer Storage Engine

Multer Storage Engine that uses Google Cloud Storage as a storage system.

Please read official documentation at https://googlecloudplatform.github.io/gcloud-node/#/docs/v0.36.0/storage for additional options

Installation

npm install multer-gcs

Usage

var multer = require( 'multer' );
var gcs = require( 'multer-gcs' );
var storage = gcs({
	filename    : function( req, file, cb ) {
		cb( null, file.fieldname + '-' + Date.now() );
	},
	bucket      : 'bucket-name', // Required : bucket name to upload
	projectId      : 'dummy-project', // Required : Google project ID
	keyFilename : '/path/to/keyfile.json', // Required : JSON credentials file for Google Cloud Storage
	acl : 'publicread', // Optional : Defaults to private
	preProcess: multerFilter // Optional, can be used to filter unwanted file types after determining true mimetype
});

// Optional preProcess filter
var multerFilter = function(req, file, cb){
    let allowedFileTypes = [
      'png',
      'jpg',
      'jpeg',
      'gif'
    ]

    let error = null

    if (!allowedFileTypes.includes(file.extension)) {
        error = "Invalid file type."
    }

    cb(error)
}

var gcsUpload = multer({ storage: storage });

app.post( '/upload', gcsUpload.single( 'file' ), function( req, res, next ) {

	res.send( 'File was uploaded successfully!' );

});

You can also use environment variables for multer-gcs parameters.

GCS_BUCKET='bucket-name'
GCLOUD_PROJECT='dummy-project'
GCS_KEYFILE='/path/to/keyfile.json'

License

MIT