/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF 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.

  */

 package org.apache.any23.util;

 import java.io.IOException;

 import java.net.MalformedURLException;

 import java.net.URL;

 import java.net.URLConnection;

 /**

  * Contains general utility functions for handling URLs.

  *

  * @author Michele Mostarda (mostarda@fbk.eu)

  */

 public class URLUtils {

     /**

      * Verifies if the specified URL is reachable online.

      *

      * @param url input URL.

      * @return <code>true</code> if the resource can be accessed, <code>false</code> otherwise.

      * @throws MalformedURLException if <code>url</code> is malformed.

      */

     public static boolean isOnline(String url) throws MalformedURLException {

         try {

             final URLConnection connection = new URL(url).openConnection();

             connection.getInputStream().close();

             return true;

         } catch (IOException ioe) {

             if(ioe instanceof MalformedURLException) {

                 throw (MalformedURLException) ioe;

             }

             return false;

         }

     }

     private URLUtils(){}

 }