mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-09-20 11:15:18 +00:00
de23201cbb
- Armor some character index checking - Add compatibility stuff for PHP_EOL - Add autoclose for colgroup - Compensate for realpath() quirkiness in old versions - Add flush maintenance script git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1096 48356398-32a2-884e-a903-53898d9a118a
58 lines
2.0 KiB
PHP
58 lines
2.0 KiB
PHP
<?php
|
|
|
|
require_once 'HTMLPurifier/AttrDef/URI.php';
|
|
|
|
/**
|
|
* Validates a URI in CSS syntax, which uses url('http://example.com')
|
|
* @note While theoretically speaking a URI in a CSS document could
|
|
* be non-embedded, as of CSS2 there is no such usage so we're
|
|
* generalizing it. This may need to be changed in the future.
|
|
* @warning Since HTMLPurifier_AttrDef_CSS blindly uses semicolons as
|
|
* the separator, you cannot put a literal semicolon in
|
|
* in the URI. Try percent encoding it, in that case.
|
|
*/
|
|
class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
|
|
{
|
|
|
|
function HTMLPurifier_AttrDef_CSS_URI() {
|
|
$this->HTMLPurifier_AttrDef_URI(true); // always embedded
|
|
}
|
|
|
|
function validate($uri_string, $config, &$context) {
|
|
// parse the URI out of the string and then pass it onto
|
|
// the parent object
|
|
|
|
$uri_string = $this->parseCDATA($uri_string);
|
|
if (strpos($uri_string, 'url(') !== 0) return false;
|
|
$uri_string = substr($uri_string, 4);
|
|
$new_length = strlen($uri_string) - 1;
|
|
if ($uri_string[$new_length] != ')') return false;
|
|
$uri = trim(substr($uri_string, 0, $new_length));
|
|
|
|
if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
|
|
$quote = $uri[0];
|
|
$new_length = strlen($uri) - 1;
|
|
if ($uri[$new_length] !== $quote) return false;
|
|
$uri = substr($uri, 1, $new_length - 1);
|
|
}
|
|
|
|
$keys = array( '(', ')', ',', ' ', '"', "'");
|
|
$values = array('\\(', '\\)', '\\,', '\\ ', '\\"', "\\'");
|
|
$uri = str_replace($values, $keys, $uri);
|
|
|
|
$result = parent::validate($uri, $config, $context);
|
|
|
|
if ($result === false) return false;
|
|
|
|
// escape necessary characters according to CSS spec
|
|
// except for the comma, none of these should appear in the
|
|
// URI at all
|
|
$result = str_replace($keys, $values, $result);
|
|
|
|
return "url($result)";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
?>
|