Viewing file:  GadgetRenderingServlet.php (4.34 KB) -rwxr-xr-x
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<?php
/**
* 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.
*/
require_once 'src/common/HttpServlet.php';
require_once 'src/common/JsMin.php';
require_once 'src/common/SecurityTokenDecoder.php';
require_once 'src/common/SecurityToken.php';
require_once 'src/common/BlobCrypter.php';
require_once 'src/common/RemoteContentRequest.php';
require_once 'src/common/RemoteContent.php';
require_once 'src/common/Cache.php';
require_once 'src/common/RemoteContentFetcher.php';
require_once 'src/gadgets/GadgetSpecParser.php';
require_once 'src/gadgets/GadgetBlacklist.php';
require_once 'src/gadgets/sample/BasicGadgetBlacklist.php';
require_once 'src/gadgets/GadgetContext.php';
require_once 'src/gadgets/GadgetFactory.php';
require_once 'src/gadgets/GadgetSpec.php';
require_once 'src/gadgets/Gadget.php';
require_once 'src/gadgets/GadgetException.php';
require_once 'src/gadgets/render/GadgetRenderer.php';
require_once 'src/gadgets/rewrite/GadgetRewriter.php';
require_once 'src/gadgets/rewrite/DomRewriter.php';
class GadgetRenderingServlet extends HttpServlet {
private $context;
public function doGet() {
try {
if (empty($_GET['url'])) {
throw new GadgetException("Missing required parameter: url");
}
$this->context = new GadgetContext('GADGET');
$gadgetSigner = Config::get('security_token_signer');
$gadgetSigner = new $gadgetSigner();
try {
$token = $this->context->extractAndValidateToken($gadgetSigner);
} catch (Exception $e) {
// no token given, this is a fatal error if 'render_token_required' is set to true
if (Config::get('render_token_required')) {
$this->showError($e);
} else {
$token = '';
}
}
$gadgetSpecFactory = new GadgetFactory($this->context, $token);
$gadget = $gadgetSpecFactory->createGadget();
$this->setCachingHeaders();
$this->renderGadget($gadget);
} catch (Exception $e) {
$this->showError($e);
}
}
private function renderGadget(Gadget $gadget) {
$view = $gadget->getView($this->context->getView());
if ($view['type'] == 'URL') {
require_once "src/gadgets/render/GadgetUrlRenderer.php";
$gadgetRenderer = new GadgetUrlRenderer($this->context);
} elseif ($view['type'] == 'HTML' && empty($view['href'])) {
require_once "src/gadgets/render/GadgetHtmlRenderer.php";
$gadgetRenderer = new GadgetHtmlRenderer($this->context);
} elseif (empty($view['type']) || ! empty($view['href'])) {
require_once "src/gadgets/render/GadgetHrefRenderer.php";
$gadgetRenderer = new GadgetHrefRenderer($this->context);
} else {
throw new GadgetException("Invalid view type");
}
$gadgetRenderer->renderGadget($gadget, $view);
}
private function setCachingHeaders() {
$this->setContentType("text/html; charset=UTF-8");
if ($this->context->getIgnoreCache()) {
// no cache was requested, set non-caching-headers
$this->setNoCache(true);
} elseif (isset($_GET['v'])) {
// version was given, cache for a long long time (a year)
$this->setCacheTime(365 * 24 * 60 * 60);
} else {
// no version was given, cache for 5 minutes
$this->setCacheTime(5 * 60);
}
}
private function showError($e) {
header("HTTP/1.0 400 Bad Request", true, 400);
echo "<html><body>";
echo "<h1>Error</h1>";
echo $e->getMessage();
if (Config::get('debug')) {
echo "<p><b>Debug backtrace</b></p><div style='overflow:auto; height:300px; border:1px solid #000000'><pre>";
print_r(debug_backtrace());
echo "</pre></div>>";
}
echo "</body></html>";
die();
}
}
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