encoding/decoding and Buffers

gistfile1.txt

// Return a buffer, that when encoded to base64, will be of size "length"
exports.randomBytesBase64 = function(length){
    length = Math.ceil(length * 3/4);
    return require('crypto').randomBytes(length);
}

// Take a buffer and create a base64, url safe encoding
exports.urlEncode = function(buffer){
    return buffer.toString('base64').replace(/\//g,'_').replace(/\+/g,'-');
}

exports.urlDecode = function(string){
    return new Buffer(string.replace(/_/g,'/').replace(/\-/g,'+'), 'base64');
}

var original = exports.randomBytesBase64(8),
    encoded = exports.urlEncode(original),
    decoded = exports.urlDecode(encoded);


// original should be the same as decoded
console.log(original, encoded.toString(), decoded, original.toString() == decoded.toString());