NodeJS Photo Upload with Azure Storage

AzureStorage.js

exports.addCarPhoto = function(req, res) {
	
	var userID = req.user._id;
	
	var carsBaseURI = "http://sobrioapp.blob.core.windows.net/cars/";
	
	// setup photo meta data
	var type = req.files.photo.type;
	var filename = req.params.id + "-" + req.files.photo.name;
	var path = req.files.photo.path;
	
	// check if it has the right filetype
	if(type == "image/jpeg" || type == "image/jpg" || type == "image/png") {
		
		// initiate a blobService object for Azure
		var blobService = azure.createBlobService();
	
		var options = {
			contentType: type,
			metadata: { fileName: filename }
		}
		
		// Fire off in series so that the tmp photo isn't deleted before its fully uploaded
		async.series({
			block: function(callback) {
				blobService.createBlockBlobFromFile('cars', filename, path, options, callback);
			},
			unlink: function(callback) {
				fs.unlink(path, callback);
			}
		}, function(err, results) {
			
			// Update the user's car with the new photo
			var update = User.findOneAndUpdate({
				"_id": userID,
				"cars._id": req.params.id
			}, {
				$set: {
					'cars.$.photo': carsBaseURI + results.block[0].blob
				}
			});
			
			var promise = update.exec();
			
			promise.addBack(function(err, user) {
				
				if(err) {
					res.send(err);
				} else {
					res.send(user.cars);
				}
				
			});

		});
		
	}
	
	
	
}