Javascript data compressor and decompressor

compressor.js

var winston = require('winston');
var compressjs = require('compressjs');
var algorithm = compressjs.Bzip2;

exports.compressString = function(string) {
	var bufferedString = new Buffer(string, 'utf8');
	var compressedString = algorithm.compressFile(bufferedString);
	var encodedString = new Buffer(compressedString).toString('base64');
	return encodedString;
}

exports.decompressString = function(string) {
	var unencodedString = new Buffer(string, 'base64');
	var decompressedString = algorithm.decompressFile(unencodedString);
	var originalString = new Buffer(decompressedString).toString('utf8');
	return originalString;
}

exports.compressData = function(data) {
	var jsonString = JSON.stringify(data);
	var compressedData = exports.compressString(jsonString);
	return compressedData;
}

exports.decompressData = function(data) {
	var jsonString = exports.decompressString(data);
	var actualData = JSON.parse(jsonString);
	return actualData;
}