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Sandbox.php (1699B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2010 Fabien Potencier
      7  *
      8  * For the full copyright and license information, please view the LICENSE
      9  * file that was distributed with this source code.
     10  */
     11 
     12 /**
     13  * Marks a section of a template as untrusted code that must be evaluated in the sandbox mode.
     14  *
     15  * <pre>
     16  * {% sandbox %}
     17  *     {% include 'user.html' %}
     18  * {% endsandbox %}
     19  * </pre>
     20  *
     21  * @see http://www.twig-project.org/doc/api.html#sandbox-extension for details
     22  */
     23 class Twig_TokenParser_Sandbox extends Twig_TokenParser
     24 {
     25     public function parse(Twig_Token $token)
     26     {
     27         $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
     28         $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
     29         $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
     30 
     31         // in a sandbox tag, only include tags are allowed
     32         if (!$body instanceof Twig_Node_Include) {
     33             foreach ($body as $node) {
     34                 if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
     35                     continue;
     36                 }
     37 
     38                 if (!$node instanceof Twig_Node_Include) {
     39                     throw new Twig_Error_Syntax('Only "include" tags are allowed within a "sandbox" section.', $node->getLine(), $this->parser->getFilename());
     40                 }
     41             }
     42         }
     43 
     44         return new Twig_Node_Sandbox($body, $token->getLine(), $this->getTag());
     45     }
     46 
     47     public function decideBlockEnd(Twig_Token $token)
     48     {
     49         return $token->test('endsandbox');
     50     }
     51 
     52     public function getTag()
     53     {
     54         return 'sandbox';
     55     }
     56 }