Handler response in nodejs - node.js

Question

I am new in NodeJS, and I am working an an example:
function test(req,res){
var path = urls[Math.floor(Math.random()*urls.length)];
console.log("try to redirect to:"+path);
http.get(path,function(res_server){
//how to send the data from res_server to res
});
}
And the urls is an array of url.
I wonder how can I send the data from the res_server to the original client response?
BTW, the url maybe http or https.
update
var urls=["url1","url2","url3"];
var path = urls[Math.floor(Math.random()*urls.length)]; // find an random item from the array
update:2
Fine, this is the complete simple test script:
var http=require("http");
http.createServer(function(req, res1) {
var url = 'http://www.google.com.hk/images/srpr/logo11w.png';
var hp=require("http");
hp.get(url, function(res2) {
res2.pipe(res1);
});
}).listen(3000);
It works, but if you change http://www.google.com.hk/...logo..png to https:/www.google.....png
It will throw error:
http.js:1840
throw new Error('Protocol:' + options.protocol + ' not supported.');
^
Error: Protocol:https: not supported.
at Object.exports.request (http.js:1840:11)
at Object.exports.get (http.js:1847:21)
at Server.<anonymous> (C:\Users\maven\Desktop\t.js:6:6)
at Server.EventEmitter.emit (events.js:98:17)
at HTTPParser.parser.onIncoming (http.js:2108:12)
at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:121:23)
at Socket.socket.ondata (http.js:1966:22)
at TCP.onread (net.js:525:27)

Answer 1

Change var http = require('http'); to var http = require('https');

Answer 2

I do not fully understand your example. Looks strange to me. However best would be to pipe the request response into the server response:
http.createServer(function(req, res1) {
var path = url.format({
protocol: 'http:',
host: 'www.google.com'
});
http.get(path, function(res2) {
res2.pipe(res1);
});
}).listen(3000);