| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
- $Id: rcube_shared.inc 2789 2009-07-23 12:14:17Z alec $
+ $Id: rcube_shared.inc 3063 2009-10-27 09:43:39Z alec $
*/
header("Pragma: no-cache");
// We need to set the following headers to make downloads work using IE in HTTPS mode.
- if (isset($_SERVER['HTTPS'])) {
+ if (rcube_https_check()) {
header('Pragma: ');
header('Cache-Control: ');
}
return $mime_type;
}
-
/**
* A method to guess encoding of a string.
*
return $result ? $result : $failover;
}
+/**
+ * Removes non-unicode characters from input
+ *
+ * @param mixed $input String or array.
+ * @return string
+ */
+function rc_utf8_clean($input)
+{
+ // handle input of type array
+ if (is_array($input)) {
+ foreach ($input as $idx => $val)
+ $input[$idx] = rc_utf8_clean($val);
+ return $input;
+ }
+
+ if (!is_string($input) || $input == '')
+ return $input;
+
+ // iconv/mbstring are much faster (especially with long strings)
+ if (function_exists('mb_convert_encoding') && ($res = mb_convert_encoding($input, 'UTF8', 'UTF8')))
+ return $res;
+
+ if (function_exists('iconv') && ($res = iconv('UTF8', 'UTF8//IGNORE', $input)))
+ return $res;
+
+ $regexp = '/^('.
+// '[\x00-\x7F]'. // UTF8-1
+ '|[\xC2-\xDF][\x80-\xBF]'. // UTF8-2
+ '|\xE0[\xA0-\xBF][\x80-\xBF]'. // UTF8-3
+ '|[\xE1-\xEC][\x80-\xBF][\x80-\xBF]'. // UTF8-3
+ '|\xED[\x80-\x9F][\x80-\xBF]'. // UTF8-3
+ '|[\xEE-\xEF][\x80-\xBF][\x80-\xBF]'. // UTF8-3
+ '|\xF0[\x90-\xBF][\x80-\xBF][\x80-\xBF]'. // UTF8-4
+ '|[\xF1-\xF3][\x80-\xBF][\x80-\xBF][\x80-\xBF]'.// UTF8-4
+ '|\xF4[\x80-\x8F][\x80-\xBF][\x80-\xBF]'. // UTF8-4
+ ')$/';
+
+ $seq = '';
+ $out = '';
+
+ for ($i = 0, $len = strlen($input)-1; $i < $len; $i++) {
+ $chr = $input[$i];
+ $ord = ord($chr);
+ // 1-byte character
+ if ($ord <= 0x7F) {
+ if ($seq)
+ $out .= preg_match($regexp, $seq) ? $seq : '';
+ $seq = '';
+ $out .= $chr;
+ // first (or second) byte of multibyte sequence
+ } else if ($ord >= 0xC0) {
+ if (strlen($seq)>1) {
+ $out .= preg_match($regexp, $seq) ? $seq : '';
+ $seq = '';
+ } else if ($seq && ord($seq) < 0xC0) {
+ $seq = '';
+ }
+ $seq .= $chr;
+ // next byte of multibyte sequence
+ } else if ($seq) {
+ $seq .= $chr;
+ }
+ }
+
+ if ($seq)
+ $out .= preg_match($regexp, $seq) ? $seq : '';
+
+ return $out;
+}
/**
* Explode quoted string