projects / github / wallabag / wallabag.git / blame
| Commit | Line | Data |
|---|---|---|
| d4949327 NL |
1 | <?php\r |
| 2 | \r | |
| 3 | /**\r | |
| 4 | * Implements safety checks for safe iframes.\r | |
| 5 | *\r | |
| 6 | * @warning This filter is *critical* for ensuring that %HTML.SafeIframe\r | |
| 7 | * works safely.\r | |
| 8 | */\r | |
| 9 | class HTMLPurifier_URIFilter_SafeIframe extends HTMLPurifier_URIFilter\r | |
| 10 | {\r | |
| 11 | /**\r | |
| 12 | * @type string\r | |
| 13 | */\r | |
| 14 | public $name = 'SafeIframe';\r | |
| 15 | \r | |
| 16 | /**\r | |
| 17 | * @type bool\r | |
| 18 | */\r | |
| 19 | public $always_load = true;\r | |
| 20 | \r | |
| 21 | /**\r | |
| 22 | * @type string\r | |
| 23 | */\r | |
| 24 | protected $regexp = null;\r | |
| 25 | \r | |
| 26 | // XXX: The not so good bit about how this is all set up now is we\r | |
| 27 | // can't check HTML.SafeIframe in the 'prepare' step: we have to\r | |
| 28 | // defer till the actual filtering.\r | |
| 29 | /**\r | |
| 30 | * @param HTMLPurifier_Config $config\r | |
| 31 | * @return bool\r | |
| 32 | */\r | |
| 33 | public function prepare($config)\r | |
| 34 | {\r | |
| 35 | $this->regexp = $config->get('URI.SafeIframeRegexp');\r | |
| 36 | return true;\r | |
| 37 | }\r | |
| 38 | \r | |
| 39 | /**\r | |
| 40 | * @param HTMLPurifier_URI $uri\r | |
| 41 | * @param HTMLPurifier_Config $config\r | |
| 42 | * @param HTMLPurifier_Context $context\r | |
| 43 | * @return bool\r | |
| 44 | */\r | |
| 45 | public function filter(&$uri, $config, $context)\r | |
| 46 | {\r | |
| 47 | // check if filter not applicable\r | |
| 48 | if (!$config->get('HTML.SafeIframe')) {\r | |
| 49 | return true;\r | |
| 50 | }\r | |
| 51 | // check if the filter should actually trigger\r | |
| 52 | if (!$context->get('EmbeddedURI', true)) {\r | |
| 53 | return true;\r | |
| 54 | }\r | |
| 55 | $token = $context->get('CurrentToken', true);\r | |
| 56 | if (!($token && $token->name == 'iframe')) {\r | |
| 57 | return true;\r | |
| 58 | }\r | |
| 59 | // check if we actually have some whitelists enabled\r | |
| 60 | if ($this->regexp === null) {\r | |
| 61 | return false;\r | |
| 62 | }\r | |
| 63 | // actually check the whitelists\r | |
| 64 | return preg_match($this->regexp, $uri->toString());\r | |
| 65 | }\r | |
| 66 | }\r | |
| 67 | \r | |
| 68 | // vim: et sw=4 sts=4\r |