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POHow to properly enable the twig's sandbox extension in Symfony2?
 

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  1. POHow to properly enable the twig's sandbox extension in Symfony2?
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    <p>In Symfony2, there is some Twig module disabled by default. One of them is the debug extension, that adds <code>{% debug %}</code> tag (useful on a development environment).</p> <p>To enable it, nothing really difficult, you add this service to your configuration :</p> <pre><code> debug.twig.extension: class: Twig_Extensions_Extension_Debug tags: - { name: 'twig.extension' } </code></pre> <p>But how to enable the <code>{% sandbox %}</code> tag?</p> <p>My issue is that the extension's constructor takes security policies :</p> <pre><code>public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false) { $this-&gt;policy = $policy; $this-&gt;sandboxedGlobally = $sandboxed; } </code></pre> <p>By reading the <a href="http://twig.sensiolabs.org/doc/api.html#sandbox-extension" rel="nofollow">twig documentation</a>, I seen the way to do it natively (without Symfony2) :</p> <pre><code>$tags = array('if'); $filters = array('upper'); $methods = array( 'Article' =&gt; array('getTitle', 'getBody'), ); $properties = array( 'Article' =&gt; array('title', 'body'), ); $functions = array('range'); $policy = new Twig_Sandbox_SecurityPolicy($tags, $filters, $methods, $properties, $functions); $sandbox = new Twig_Extension_Sandbox($policy); $twig-&gt;addExtension($sandbox); </code></pre> <p>I can do something like that inside a service just before using the sandbox, but that's not as clear as the dependancy injection we're used to.</p> <p><strong>Is there a better / proper way to enable the twig's sandbox extension in Symfony2?</strong></p>
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