If you want to get the full requested URL in your Express application:

var requestedUrl = req.protocol + '://' + req.get('Host') + req.originalUrl;

If you want to make it available on your views you can use a middleware function to add context to the response's local context:

app.use(function(req, res, next){
    if(!res.locals) res.locals = {};
    var requestedUrl = req.protocol + '://' + req.get('Host') + req.originalUrl;
    res.requestedUrl = requestedUrl;
    next();
});