ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
URISchemeRegistry.php
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1<?php
2
7{
8
17 public static function instance($prototype = null)
18 {
19 static $instance = null;
20 if ($prototype !== null) {
21 $instance = $prototype;
22 } elseif ($instance === null || $prototype == true) {
23 $instance = new HTMLPurifier_URISchemeRegistry();
24 }
25 return $instance;
26 }
27
32 protected $schemes = array();
33
41 public function getScheme($scheme, $config, $context)
42 {
43 if (!$config) {
45 }
46
47 // important, otherwise attacker could include arbitrary file
48 $allowed_schemes = $config->get('URI.AllowedSchemes');
49 if (!$config->get('URI.OverrideAllowedSchemes') &&
50 !isset($allowed_schemes[$scheme])
51 ) {
52 return;
53 }
54
55 if (isset($this->schemes[$scheme])) {
56 return $this->schemes[$scheme];
57 }
58 if (!isset($allowed_schemes[$scheme])) {
59 return;
60 }
61
62 $class = 'HTMLPurifier_URIScheme_' . $scheme;
63 if (!class_exists($class)) {
64 return;
65 }
66 $this->schemes[$scheme] = new $class();
67 return $this->schemes[$scheme];
68 }
69
75 public function register($scheme, $scheme_obj)
76 {
77 $this->schemes[$scheme] = $scheme_obj;
78 }
79}
80
81// vim: et sw=4 sts=4
static createDefault()
Convenience constructor that creates a default configuration object.
Definition: Config.php:154
Registry for retrieving specific URI scheme validator objects.
$schemes
Cache of retrieved schemes.
static instance($prototype=null)
Retrieve sole instance of the registry.
getScheme($scheme, $config, $context)
Retrieves a scheme validator object.