diff options
Diffstat (limited to 'extlib/Auth/OpenID/Parse.php')
| -rw-r--r-- | extlib/Auth/OpenID/Parse.php | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/extlib/Auth/OpenID/Parse.php b/extlib/Auth/OpenID/Parse.php index 546f34f6b..6c2e72169 100644 --- a/extlib/Auth/OpenID/Parse.php +++ b/extlib/Auth/OpenID/Parse.php @@ -101,7 +101,7 @@ class Auth_OpenID_Parse { * Starts with the tag name at a word boundary, where the tag name * is not a namespace */ - var $_tag_expr = "<%s\b(?!:)([^>]*?)(?:\/>|>(.*?)(?:<\/?%s\s*>|\Z))"; + var $_tag_expr = "<%s\b(?!:)([^>]*?)(?:\/>|>(.*)(?:<\/?%s\s*>|\Z))"; var $_attr_find = '\b(\w+)=("[^"]*"|\'[^\']*\'|[^\'"\s\/<>]+)'; @@ -215,11 +215,31 @@ class Auth_OpenID_Parse { return $str; } } + + function match($regexp, $text, &$match) + { + if (!is_callable('mb_ereg_search_init')) { + return preg_match($regexp, $text, $match); + } + + $regexp = substr($regexp, 1, strlen($regexp) - 2 - strlen($this->_re_flags)); + mb_ereg_search_init($text); + if (!mb_ereg_search($regexp)) { + return false; + } + list($match) = mb_ereg_search_getregs(); + return true; + } /** * Find all link tags in a string representing a HTML document and * return a list of their attributes. * + * @todo This is quite ineffective and may fail with the default + * pcre.backtrack_limit of 100000 in PHP 5.2, if $html is big. + * It should rather use stripos (in PHP5) or strpos()+strtoupper() + * in PHP4 to manage this. + * * @param string $html The text to parse * @return array $list An array of arrays of attributes, one for each * link tag @@ -244,18 +264,23 @@ class Auth_OpenID_Parse { $stripped = substr($stripped, $html_begin, $html_end - $html_begin); + // Workaround to prevent PREG_BACKTRACK_LIMIT_ERROR: + $old_btlimit = ini_set( 'pcre.backtrack_limit', -1 ); + // Try to find the <HEAD> tag. $head_re = $this->headFind(); - $head_matches = array(); - if (!preg_match($head_re, $stripped, $head_matches)) { - return array(); + $head_match = ''; + if (!$this->match($head_re, $stripped, $head_match)) { + ini_set( 'pcre.backtrack_limit', $old_btlimit ); + return array(); } $link_data = array(); $link_matches = array(); - if (!preg_match_all($this->_link_find, $head_matches[0], + if (!preg_match_all($this->_link_find, $head_match, $link_matches)) { + ini_set( 'pcre.backtrack_limit', $old_btlimit ); return array(); } @@ -273,6 +298,7 @@ class Auth_OpenID_Parse { $link_data[] = $link_attrs; } + ini_set( 'pcre.backtrack_limit', $old_btlimit ); return $link_data; } @@ -349,4 +375,3 @@ function Auth_OpenID_legacy_discover($html_text, $server_rel, } } -?>
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