Nodejs: how to clone or duplicate an incoming soap http request?

My Node.js server receives http soap requests. I would like to clone/duplicate each requests in order to send one to server A and the other to server B. How can I do that? Thanks

var proxy = httpProxy.createProxyServer({changeOrigin: true});
app.all('/', (req, res) =>{
     // Duplicate or clone request
     // ..... and send it to server B

     // Forward original request to Server A
     proxy.web(req, res, { target: url_serverA }, function(e) {})
});