php/src/gadgets/servlet/ProxyServlet.php

   1 <?php
   2 /**
   3  * Licensed to the Apache Software Foundation (ASF) under one
   4  * or more contributor license agreements.  See the NOTICE file
   5  * distributed with this work for additional information
   6  * regarding copyright ownership.  The ASF licenses this file
   7  * to you under the Apache License, Version 2.0 (the
   8  * "License"); you may not use this file except in compliance
   9  * with the License.  You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing,
  14  * software distributed under the License is distributed on an
  15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  16  * KIND, either express or implied.  See the License for the
  17  * specific language governing permissions and limitations
  18  * under the License.
  19  */
  20
  21 require 'src/common/HttpServlet.php';
  22 require 'src/gadgets/GadgetContext.php';
  23 require 'src/gadgets/ProxyBase.php';
  24 require 'src/gadgets/ProxyHandler.php';
  25 require 'src/common/RemoteContentRequest.php';
  26 require 'src/common/RemoteContent.php';
  27 require 'src/common/Cache.php';
  28 require 'src/common/RemoteContentFetcher.php';
  29
  30 class ProxyServlet extends HttpServlet {
  31
  32   public function doGet() {
  33     try {
  34       // Make sure the HttpServlet doesn't overwrite our headers
  35       $this->noHeaders = true;
  36       $context = new GadgetContext('GADGET');
  37       $url = (isset($_GET['url']) ? $_GET['url'] : (isset($_POST['url']) ? $_POST['url'] : false));
  38       $url = urldecode($url);
  39       if (! $url) {
  40         header("HTTP/1.0 400 Bad Request", true);
  41         echo "<html><body><h1>400 - Missing url parameter</h1></body></html>";
  42       }
  43       $proxyHandler = new ProxyHandler($context);
  44       $proxyHandler->fetch($url);
  45     } catch (Exception $e) {
  46       // catch all exceptions and give a 500 server error
  47       header("HTTP/1.0 500 Internal Server Error");
  48       echo "<h1>Internal server error</h1><p>" . $e->getMessage() . "</p>";
  49     }
  50   }
  51
  52   public function doPost() {
  53     $this->doGet();
  54   }
  55 }