| 1 |
2
|
Manuela
|
<?php
|
| 2 |
|
|
|
| 3 |
|
|
/*
|
| 4 |
|
|
* This file is part of Twig.
|
| 5 |
|
|
*
|
| 6 |
|
|
* (c) 2009 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 |
|
|
* 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 |
|
|
}
|