I'm trying to create a proxy server to pass HTTP GET requests from a client to a third party website (say google). My proxy just needs to mirror incoming requests to their corresponding path on the target site, so if my client's requested url is:

127.0.0.1/images/srpr/logo11w.png

the following resource should be served:

http://www.google.com/images/srpr/logo11w.png

here is what I came up with:

http.createServer(onRequest).listen(80);

function onRequest (client_req, client_res) {
    client_req.addListener("end", function() {
        var options = {
            hostname: 'www.google.com',
            port: 80,
            path: client_req.url,
            method: 'GET'
        };
        var req=http.request(options, function(res) {
            var body;
            res.on('data', function (chunk) {
                body += chunk;
            });
            res.on('end', function () {
                 client_res.writeHead(res.statusCode, res.headers);
                 client_res.end(body);
            });
        });
        req.end();
    });
}

it works well with html pages, but for other types of files, it just returns a blank page or some error message from target site (which varies in different sites).