mirror of
https://github.com/renbaoshuo/S2OJ.git
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80 lines
2.5 KiB
PHP
80 lines
2.5 KiB
PHP
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<?php
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/**
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* Validates name/value pairs in param tags to be used in safe objects. This
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* will only allow name values it recognizes, and pre-fill certain attributes
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* with required values.
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*
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* @note
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* This class only supports Flash. In the future, Quicktime support
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* may be added.
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*
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* @warning
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* This class expects an injector to add the necessary parameters tags.
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*/
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class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
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{
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/**
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* @type string
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*/
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public $name = "SafeParam";
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/**
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* @type HTMLPurifier_AttrDef_URI
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*/
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private $uri;
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public function __construct()
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{
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$this->uri = new HTMLPurifier_AttrDef_URI(true); // embedded
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$this->wmode = new HTMLPurifier_AttrDef_Enum(array('window', 'opaque', 'transparent'));
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}
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/**
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* @param array $attr
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return array
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*/
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public function transform($attr, $config, $context)
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{
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// If we add support for other objects, we'll need to alter the
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// transforms.
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switch ($attr['name']) {
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// application/x-shockwave-flash
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// Keep this synchronized with Injector/SafeObject.php
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case 'allowScriptAccess':
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$attr['value'] = 'never';
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break;
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case 'allowNetworking':
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$attr['value'] = 'internal';
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break;
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case 'allowFullScreen':
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if ($config->get('HTML.FlashAllowFullScreen')) {
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$attr['value'] = ($attr['value'] == 'true') ? 'true' : 'false';
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} else {
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$attr['value'] = 'false';
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}
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break;
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case 'wmode':
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$attr['value'] = $this->wmode->validate($attr['value'], $config, $context);
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break;
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case 'movie':
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case 'src':
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$attr['name'] = "movie";
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$attr['value'] = $this->uri->validate($attr['value'], $config, $context);
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break;
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case 'flashvars':
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// we're going to allow arbitrary inputs to the SWF, on
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// the reasoning that it could only hack the SWF, not us.
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break;
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// add other cases to support other param name/value pairs
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default:
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$attr['name'] = $attr['value'] = null;
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}
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return $attr;
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}
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}
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// vim: et sw=4 sts=4
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