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<?php
class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
{
/**
* @type string
*/
public $name = 'DisableExternal';
/**
* @type array
*/
protected $ourHostParts = false;
/**
* @param HTMLPurifier_Config $config
* @return void
*/
public function prepare($config)
{
$our_host = $config->getDefinition('URI')->host;
if ($our_host !== null) {
$this->ourHostParts = array_reverse(explode('.', $our_host));
}
}
/**
* @param HTMLPurifier_URI $uri Reference
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return bool
*/
public function filter(&$uri, $config, $context)
{
if (is_null($uri->host)) {
return true;
}
if ($this->ourHostParts === false) {
return false;
}
$host_parts = array_reverse(explode('.', $uri->host));
foreach ($this->ourHostParts as $i => $x) {
if (!isset($host_parts[$i])) {
return false;
}
if ($host_parts[$i] != $this->ourHostParts[$i]) {
return false;
}
}
return true;
}
}
// vim: et sw=4 sts=4
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