HTTP agent as a proxy tunel

proxy.js

function request_proxy(options, callback) {

	var proxy = options.proxy;
	proxy.path = options.uri.hostname;
	proxy.headers = { host: options.uri.hostname };

	if (proxy.auth)
		proxy.headers['Proxy-Authorization'] = 'Basic ' + U.createBuffer(proxy.auth).toString('base64');

	var req = Https.request(proxy);

	req.on('error', function(e) {
		options.callback(new Error('Proxy error: ' + e.toString()), '', 0, EMPTYOBJECT, proxy.hostname, EMPTYOBJECT);
		options.callback = null;
	});

	req.on('connect', function(res, socket) {
		if (res.statusCode === 200) {
			options.uri.agent = options.uri.protocol === 'http:' ? new Http.Agent() : new Https.Agent();
			options.uri.agent.reuseSocket(socket, req);
			options.socket = socket;
			callback(options.uri, options);
		} else {
			options.callback(new Error((res.statusMessage || 'Proxy error') + ': ' + res.statusCode), '', res.statusCode, res.headers, proxy.hostname, EMPTYOBJECT);
			options.callback = null;
		}
	});

	req.end();
}