This nodejs module allows you to parse the url and return urls with or without protocol and with or without www.

    var recomposeUrl = require('recompose-url');
    recomposeUrl.setUrls('domain.com', true, function (err, result) { 
      console.log('Urls:', result);
    });

    recomposeUrl.setUrls('http://www.domain.com/path?param=1', true, function (err, result) { 
      console.log('Urls:', result);
    });

{ { originUrl: 'http://www.domain.com/path?param=1' }, { withHttpWwwHost: 'http://www.domain.com' }, { withHttpsWwwHost: 'https://www.domain.com' }, { withHttpHost: 'http://domain.com' }, { withHttpsHost: 'https://domain.com' } { withHttpWww: 'http://www.domain.com/path?param=1' }, { withHttpsWww: 'https://www.domain.com/path?param=1' }, { withHttp: 'http://domain.com/path?param=1' }, { withHttps: 'https://domain.com/path?param=1' } }