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})";
}
public 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);
}
$uri = $this->expandCSSEscape($uri);
$result = parent::validate($uri, $config, $context);
if ($result === false) {
return false;
}
// extra sanity check; should have been done by URI
$result = str_replace(array('"', "\\", "\n", "\f", "\r"), "", $result);
return "url(\"{$result}\")";
}
/**
* @param string $uri_string
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return bool|string
*/
public function validate($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));
$quote = '"';
// BSz
if (!empty($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);
}
$uri = $this->expandCSSEscape($uri);
$result = parent::validate($uri, $config, $context);
if ($result === false) {
return false;
}
// extra sanity check; should have been done by URI
$result = str_replace(array('"', "\\", "\n", "\f", "\r"), "", $result);
// suspicious characters are ()'; we're going to percent encode
// them for safety.
$result = str_replace(array('(', ')', "'"), array('%28', '%29', '%27'), $result);
// there's an extra bug where ampersands lose their escaping on
// an innerHTML cycle, so a very unlucky query parameter could
// then change the meaning of the URL. Unfortunately, there's
// not much we can do about that...
return 'url(' . $quote . $result . $quote . ')';
// BSz
}
function test_make()
{
$factory = new HTMLPurifier_AttrDef_URI();
$def = $factory->make('');
$def2 = new HTMLPurifier_AttrDef_URI();
$this->assertIdentical($def, $def2);
$def = $factory->make('embedded');
$def2 = new HTMLPurifier_AttrDef_URI(true);
$this->assertIdentical($def, $def2);
}
public function validate($uri_string, $config, $context)
{
$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);
}
$uri = $this->expandCSSEscape($uri);
$result = parent::validate($uri, $config, $context);
if ($result === false) {
return false;
}
$result = str_replace(array('"', "\\", "\n", "\f", "\r"), "", $result);
$result = str_replace(array('(', ')', "'"), array('%28', '%29', '%27'), $result);
return "url(\"{$result}\")";
}