Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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Sandbox.php
01 <?php
02
03 /*
04 * This file is part of Twig.
05 *
06 * (c) 2009 Fabien Potencier
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 /**
13 * Twig_NodeVisitor_Sandbox implements sandboxing.
14 *
15 * @author Fabien Potencier <fabien@symfony.com>
16 */
17 class Twig_NodeVisitor_Sandbox extends Twig_BaseNodeVisitor
18 {
19 protected $inAModule = false;
20 protected $tags;
21 protected $filters;
22 protected $functions;
23
24 /**
25 * {@inheritdoc}
26 */
27 protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
28 {
29 if ($node instanceof Twig_Node_Module) {
30 $this->inAModule = true;
31 $this->tags = array();
32 $this->filters = array();
33 $this->functions = array();
34
35 return $node;
36 } elseif ($this->inAModule) {
37 // look for tags
38 if ($node->getNodeTag() && !isset($this->tags[$node->getNodeTag()])) {
39 $this->tags[$node->getNodeTag()] = $node;
40 }
41
42 // look for filters
43 if ($node instanceof Twig_Node_Expression_Filter && !isset($this->filters[$node->getNode('filter')->getAttribute('value')])) {
44 $this->filters[$node->getNode('filter')->getAttribute('value')] = $node;
45 }
46
47 // look for functions
48 if ($node instanceof Twig_Node_Expression_Function && !isset($this->functions[$node->getAttribute('name')])) {
49 $this->functions[$node->getAttribute('name')] = $node;
50 }
51
52 // wrap print to check __toString() calls
53 if ($node instanceof Twig_Node_Print) {
54 return new Twig_Node_SandboxedPrint($node->getNode('expr'), $node->getLine(), $node->getNodeTag());
55 }
56 }
57
58 return $node;
59 }
60
61 /**
62 * {@inheritdoc}
63 */
64 protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
65 {
66 if ($node instanceof Twig_Node_Module) {
67 $this->inAModule = false;
68
69 $node->setNode('display_start', new Twig_Node(array(new Twig_Node_CheckSecurity($this->filters, $this->tags, $this->functions), $node->getNode('display_start'))));
70 }
71
72 return $node;
73 }
74
75 /**
76 * {@inheritdoc}
77 */
78 public function getPriority()
79 {
80 return 0;
81 }
82 }
83