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<?php |
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/** |
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* @author Christoph Wurst <[email protected]> |
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* @author Thomas Müller <[email protected]> |
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* |
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* Mail |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OCA\Mail\Service\HtmlPurify; |
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use HTMLPurifier_Config; |
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use HTMLPurifier_URI; |
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use HTMLPurifier_URIFilter; |
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use HTMLPurifier_URIParser; |
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use OCP\IRequest; |
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use OCP\IURLGenerator; |
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use OCP\Util; |
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class TransformURLScheme extends HTMLPurifier_URIFilter { |
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public $name = 'TransformURLScheme'; |
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public $post = true; |
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/** @var IURLGenerator */ |
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private $urlGenerator; |
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/** @var IRequest */ |
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private $request; |
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/** |
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* @var \Closure |
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*/ |
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private $mapCidToAttachmentId; |
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public function __construct($messageParameters, \Closure $mapCidToAttachmentId, |
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IURLGenerator $urlGenerator, IRequest $request) { |
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$this->messageParameters = $messageParameters; |
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$this->mapCidToAttachmentId = $mapCidToAttachmentId; |
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$this->urlGenerator = $urlGenerator; |
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$this->request = $request; |
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} |
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/** |
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* Transformator which will rewrite all HTTPS and HTTP urls to |
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* @param \HTMLPurifier_URI $uri |
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* @param HTMLPurifier_Config $config |
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* @param \HTMLPurifier_Context $context |
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* @return bool |
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*/ |
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public function filter(&$uri, $config, $context) { |
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/** @var \HTMLPurifier_Context $context */ |
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/** @var \HTMLPurifier_Config $config */ |
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// Only HTTPS and HTTP urls should get rewritten |
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if ($uri->scheme === 'https' || $uri->scheme === 'http') { |
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$uri = $this->filterHttp($uri, $context); |
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} |
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if ($uri->scheme === 'cid') { |
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$attachmentId = $this->mapCidToAttachmentId->__invoke($uri->path); |
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if (is_null($attachmentId)) { |
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return true; |
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} |
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$this->messageParameters['attachmentId'] = $attachmentId; |
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$imgUrl = $this->urlGenerator->linkToRouteAbsolute('mail.messages.downloadAttachment', |
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$this->messageParameters); |
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$parser = new HTMLPurifier_URIParser(); |
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$uri = $parser->parse($imgUrl); |
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} |
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return true; |
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} |
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/** |
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* @param HTMLPurifier_URI $uri |
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* @param \HTMLPurifier_Context $context |
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* @return HTMLPurifier_URI |
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*/ |
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private function filterHttp(&$uri, $context) { |
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$originalURL = urlencode($uri->scheme . '://' . $uri->host . $uri->path); |
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if ($uri->query !== null) { |
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$originalURL = $originalURL . urlencode('?' . $uri->query); |
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} |
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// Get the HTML attribute |
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$element = $context->get('CurrentAttr'); |
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// If element is of type "href" it is most likely a link that should get redirected |
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// otherwise it's an element that we send through our proxy |
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if ($element === 'href') { |
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$uri = new \HTMLPurifier_URI( |
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$this->request->getServerProtocol(), null, $this->request->getServerHost(), null, |
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$this->urlGenerator->linkToRoute('mail.proxy.redirect'), |
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'src=' . $originalURL, null); |
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return $uri; |
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} else { |
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$uri = new \HTMLPurifier_URI( |
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$this->request->getServerProtocol(), null, $this->request->getServerHost(), null, |
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$this->urlGenerator->linkToRoute('mail.proxy.proxy'), |
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'src=' . $originalURL . '&requesttoken=' . \OC::$server->getSession()->get('requesttoken'), |
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null); |
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return $uri; |
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} |
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} |
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} |
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owncloud /
mail
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: