mirror of
https://github.com/moodle/moodle.git
synced 2025-06-02 14:15:11 +02:00
be7f6d4834
Prior to this change, all the line endings in the imported HTMLPurifier library were using CRLF (\r\n aka Windows style), but the HTMLPurifier source and also the downloadable artefacts use LF (\n aka Linux style) as line endings. This has been the case since 510d190382003985eafd6f4407190d43509016a5 when with the commit "MDL-38672 import HTML Purifier 4.5.0" all line endings were changed from LF to CRLF. There was no comment in the commit on why this change was done. As the original source uses LF, this commit partly reverts 510d190382003985eafd6f4407190d43509016a5 and goes back to LF as line endings. Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>
82 lines
2.4 KiB
PHP
82 lines
2.4 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Registry for retrieving specific URI scheme validator objects.
|
|
*/
|
|
class HTMLPurifier_URISchemeRegistry
|
|
{
|
|
|
|
/**
|
|
* Retrieve sole instance of the registry.
|
|
* @param HTMLPurifier_URISchemeRegistry $prototype Optional prototype to overload sole instance with,
|
|
* or bool true to reset to default registry.
|
|
* @return HTMLPurifier_URISchemeRegistry
|
|
* @note Pass a registry object $prototype with a compatible interface and
|
|
* the function will copy it and return it all further times.
|
|
*/
|
|
public static function instance($prototype = null)
|
|
{
|
|
static $instance = null;
|
|
if ($prototype !== null) {
|
|
$instance = $prototype;
|
|
} elseif ($instance === null || $prototype == true) {
|
|
$instance = new HTMLPurifier_URISchemeRegistry();
|
|
}
|
|
return $instance;
|
|
}
|
|
|
|
/**
|
|
* Cache of retrieved schemes.
|
|
* @type HTMLPurifier_URIScheme[]
|
|
*/
|
|
protected $schemes = array();
|
|
|
|
/**
|
|
* Retrieves a scheme validator object
|
|
* @param string $scheme String scheme name like http or mailto
|
|
* @param HTMLPurifier_Config $config
|
|
* @param HTMLPurifier_Context $context
|
|
* @return HTMLPurifier_URIScheme
|
|
*/
|
|
public function getScheme($scheme, $config, $context)
|
|
{
|
|
if (!$config) {
|
|
$config = HTMLPurifier_Config::createDefault();
|
|
}
|
|
|
|
// important, otherwise attacker could include arbitrary file
|
|
$allowed_schemes = $config->get('URI.AllowedSchemes');
|
|
if (!$config->get('URI.OverrideAllowedSchemes') &&
|
|
!isset($allowed_schemes[$scheme])
|
|
) {
|
|
return;
|
|
}
|
|
|
|
if (isset($this->schemes[$scheme])) {
|
|
return $this->schemes[$scheme];
|
|
}
|
|
if (!isset($allowed_schemes[$scheme])) {
|
|
return;
|
|
}
|
|
|
|
$class = 'HTMLPurifier_URIScheme_' . $scheme;
|
|
if (!class_exists($class)) {
|
|
return;
|
|
}
|
|
$this->schemes[$scheme] = new $class();
|
|
return $this->schemes[$scheme];
|
|
}
|
|
|
|
/**
|
|
* Registers a custom scheme to the cache, bypassing reflection.
|
|
* @param string $scheme Scheme name
|
|
* @param HTMLPurifier_URIScheme $scheme_obj
|
|
*/
|
|
public function register($scheme, $scheme_obj)
|
|
{
|
|
$this->schemes[$scheme] = $scheme_obj;
|
|
}
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|