custom_proxy.js

var proxyToelating = function (origReq, origResp, next) {

    var url = origReq.url;
    var path = require('url').parse(url).pathname;
    var proxyReq;
    console.log("Trying to proxying " + url);
    var me = this;
    if (origReq.headers.host) origReq.headers.host = "";
    origReq.headers['Authorization'] = "Basic myauth=";

    proxyReq = require('https').request({
        hostname: "my.host.ext",
        path: path,
        method: origReq.method,
        headers: origReq.headers,
        agent: false
      },
      function (proxyres) {
        console.log(proxyres);
        proxyres.pipe(origResp, { end: true });
      }
    );

    origReq.pipe(proxyReq, { end : true });

  }


/// further on
app.use('/webdav', proxyToelating);