ILIAS  release_5-2 Revision v5.2.25-18-g3f80b828510
URI.php
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1<?php
2
13{
14
15 public function __construct()
16 {
17 parent::__construct(true); // always embedded
18 }
19
26 public function validate($uri_string, $config, $context)
27 {
28 // parse the URI out of the string and then pass it onto
29 // the parent object
30
31 $uri_string = $this->parseCDATA($uri_string);
32 if (strpos($uri_string, 'url(') !== 0) {
33 return false;
34 }
35 $uri_string = substr($uri_string, 4);
36 if (strlen($uri_string) == 0) {
37 return false;
38 }
39 $new_length = strlen($uri_string) - 1;
40 if ($uri_string[$new_length] != ')') {
41 return false;
42 }
43 $uri = trim(substr($uri_string, 0, $new_length));
44
45 if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
46 $quote = $uri[0];
47 $new_length = strlen($uri) - 1;
48 if ($uri[$new_length] !== $quote) {
49 return false;
50 }
51 $uri = substr($uri, 1, $new_length - 1);
52 }
53
54 $uri = $this->expandCSSEscape($uri);
55
56 $result = parent::validate($uri, $config, $context);
57
58 if ($result === false) {
59 return false;
60 }
61
62 // extra sanity check; should have been done by URI
63 $result = str_replace(array('"', "\\", "\n", "\x0c", "\r"), "", $result);
64
65 // suspicious characters are ()'; we're going to percent encode
66 // them for safety.
67 $result = str_replace(array('(', ')', "'"), array('%28', '%29', '%27'), $result);
68
69 // there's an extra bug where ampersands lose their escaping on
70 // an innerHTML cycle, so a very unlucky query parameter could
71 // then change the meaning of the URL. Unfortunately, there's
72 // not much we can do about that...
73 return "url(\"$result\")";
74 }
75}
76
77// vim: et sw=4 sts=4
$result
An exception for terminatinating execution or to throw for unit testing.
Validates a URI in CSS syntax, which uses url('http://example.com')
Definition: URI.php:13
validate($uri_string, $config, $context)
Definition: URI.php:26
Validates a URI as defined by RFC 3986.
Definition: URI.php:8
parseCDATA($string)
Convenience method that parses a string as if it were CDATA.
Definition: AttrDef.php:60
expandCSSEscape($string)
Parses a possibly escaped CSS string and returns the "pure" version of it.
Definition: AttrDef.php:96