class Twig_NodeVisitor_Sandbox in Zircon Profile 8

Twig_NodeVisitor_Sandbox implements sandboxing.

@author Fabien Potencier <[e-mail]>

Hierarchy

• class \Twig_BaseNodeVisitor implements Twig_NodeVisitorInterface
  • class \Twig_NodeVisitor_Sandbox

File

vendor/twig/twig/lib/Twig/NodeVisitor/Sandbox.php, line 17

class Twig_NodeVisitor_Sandbox extends Twig_BaseNodeVisitor {
  protected $inAModule = false;
  protected $tags;
  protected $filters;
  protected $functions;

  /**
   * {@inheritdoc}
   */
  protected function doEnterNode(Twig_Node $node, Twig_Environment $env) {
    if ($node instanceof Twig_Node_Module) {
      $this->inAModule = true;
      $this->tags = array();
      $this->filters = array();
      $this->functions = array();
      return $node;
    }
    elseif ($this->inAModule) {

      // look for tags
      if ($node
        ->getNodeTag() && !isset($this->tags[$node
        ->getNodeTag()])) {
        $this->tags[$node
          ->getNodeTag()] = $node;
      }

      // look for filters
      if ($node instanceof Twig_Node_Expression_Filter && !isset($this->filters[$node
        ->getNode('filter')
        ->getAttribute('value')])) {
        $this->filters[$node
          ->getNode('filter')
          ->getAttribute('value')] = $node;
      }

      // look for functions
      if ($node instanceof Twig_Node_Expression_Function && !isset($this->functions[$node
        ->getAttribute('name')])) {
        $this->functions[$node
          ->getAttribute('name')] = $node;
      }

      // wrap print to check __toString() calls
      if ($node instanceof Twig_Node_Print) {
        return new Twig_Node_SandboxedPrint($node
          ->getNode('expr'), $node
          ->getLine(), $node
          ->getNodeTag());
      }
    }
    return $node;
  }

  /**
   * {@inheritdoc}
   */
  protected function doLeaveNode(Twig_Node $node, Twig_Environment $env) {
    if ($node instanceof Twig_Node_Module) {
      $this->inAModule = false;
      $node
        ->setNode('display_start', new Twig_Node(array(
        new Twig_Node_CheckSecurity($this->filters, $this->tags, $this->functions),
        $node
          ->getNode('display_start'),
      )));
    }
    return $node;
  }

  /**
   * {@inheritdoc}
   */
  public function getPriority() {
    return 0;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Twig_BaseNodeVisitor::enterNode	final public	function	Called before child nodes are visited. Overrides Twig_NodeVisitorInterface::enterNode
Twig_BaseNodeVisitor::leaveNode	final public	function	Called after child nodes are visited. Overrides Twig_NodeVisitorInterface::leaveNode
Twig_NodeVisitor_Sandbox::$filters	protected	property
Twig_NodeVisitor_Sandbox::$functions	protected	property
Twig_NodeVisitor_Sandbox::$inAModule	protected	property
Twig_NodeVisitor_Sandbox::$tags	protected	property
Twig_NodeVisitor_Sandbox::doEnterNode	protected	function	Called before child nodes are visited. Overrides Twig_BaseNodeVisitor::doEnterNode
Twig_NodeVisitor_Sandbox::doLeaveNode	protected	function	Called after child nodes are visited. Overrides Twig_BaseNodeVisitor::doLeaveNode
Twig_NodeVisitor_Sandbox::getPriority	public	function	Returns the priority for this visitor. Overrides Twig_NodeVisitorInterface::getPriority