Vert.x HttpClient not working with github.io -- just put it into vertx-gradle-template and ./gradlew runMod

PingVerticle.java

package com.mycompany.myproject;

/*
 * Copyright 2013 Red Hat, Inc.
 * 
 * Red Hat licenses this file to you under the Apache License, version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain a copy of the License at:
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @author <a href="http://tfox.org">Tim Fox</a>
 */

import java.net.MalformedURLException;
import java.net.URL;

import org.vertx.java.core.Handler;
import org.vertx.java.core.buffer.Buffer;
import org.vertx.java.core.http.HttpClient;
import org.vertx.java.core.http.HttpClientRequest;
import org.vertx.java.core.http.HttpClientResponse;
import org.vertx.java.platform.Verticle;

/*
 * This is a simple Java verticle which receives `ping` messages on the event bus and sends back
 * `pong` replies
 */
public class PingVerticle extends Verticle {

  public void start() {

		try {
			URL url = new URL(
					"http://vert-x.github.com/vertx-mods/mods/com.campudus.session-manager-v1.2.1/mod.zip");
//					"http://unreleased.de/stuff/mod.zip");

			String host = url.getHost();
			int port = url.getPort();

			HttpClient client = vertx.createHttpClient().setHost(host);
			if (port != -1) {
				client.setPort(port);
			}

			HttpClientRequest req = client.get(url.getPath(), new Handler<HttpClientResponse>() {
				public void handle(HttpClientResponse event) {
					final Buffer buf = new Buffer(0);
					event.dataHandler(new Handler<Buffer>() {
						public void handle(Buffer buffer) {
							buf.appendBuffer(buffer);
						}
					});
					event.endHandler(new Handler<Void>() {
						public void handle(Void event) {
							System.out.println(buf.toString());
						}
					});
				}
			});

			req.putHeader("Host", host);
			req.putHeader("User-Agent", "Vertx client");

			req.end();
		} catch (MalformedURLException e) {
		}
	}
}