/*
 * valac --pkg=glib-2.0 --pkg=libsoup-2.4 redirect.vala
 *
 * Find the real URL (it even works with 302 HTTP status code).
 */

using GLib;
using Soup;


public class Request : Object {

	private string url;

	public Request (string resource) {
		this.url = resource;
	}

	private string get_real_uri (string resource) {
		Session session;
		Message msg;
		string new_url = null;

		/* Create Soup.* objects */
		session = new Session ();
		msg = new Message ("GET", resource);

		/* Signal */
		msg.got_headers.connect (() => {
				/* 302 */
				if (msg.status_code == Status.FOUND) {
					new_url = msg.response_headers.get_one ("Location");
					/* Finish processing request */
					session.cancel_message (msg, Status.CANCELLED);
				}
		});

		session.send_message (msg);

		if (new_url == null) {
			new_url = "%s".printf (resource);
		}

		return new_url;
	}

	public void send () {
		/* Find the real URI */
		stdout.printf ("%s\n", get_real_uri (this.url));
	}

	public static int main (string[] args) {
		//string uri = "http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2016-005.txt.asc";
		
		//string uri = "http://rf.proxycast.org/1175697431602405376/13940-16.06.2016-ITEMA_21011329-0.mp3";
		string uri = "http://www.podtrac.com/pts/redirect.mp4/201406.jb-dl.cdn.scaleengine.net/bsdnow/2016/bsd-0146.mp4";

		var r = new Request (uri);
		r.send ();

		return 0;
	}
}