Make further proxy requests authenticated

app.get('/hoo/ray', (req,res,next) => {


    let url = "https://www.helloworld.com/ui/fragments/header.html";

    let cookie = request.cookie(req.headers["cookie"]);

    let headers = {cookie};

    request({url, headers}, (error, response, body) => {

        url = "https://www.helloworld.com/ui/fragments/toolbox.html";

        request({url, headers}, (toolboxError, toolboxResponse, toolboxBody) => {

            let html = body + toolboxBody;

            res.writeHead(200, {
                'Content-Type'  : 'text/html',
                'Content-Length': html.length,
                'Expires'       : new Date().toUTCString()
            });


            res.end(html);

        });

    });

});

Next step, convert those callback hell to promises.