/**
* Make sure a link keyword (ie "1fv" as in "site.com/1fv") is valid.
*
*/
function yourls_sanitize_string($string)
{
// make a regexp pattern with the shorturl charset, and remove everything but this
$pattern = yourls_make_regexp_pattern(yourls_get_shorturl_charset());
$valid = substr(preg_replace('![^' . $pattern . ']!', '', $string), 0, 199);
return yourls_apply_filter('sanitize_string', $valid, $string);
}
function ozh_preview_loader_failed($args)
{
$request = $args[0];
$pattern = yourls_make_regexp_pattern(yourls_get_shorturl_charset());
if (preg_match("@^([{$pattern}]+)" . OZH_PREVIEW_CHAR . "\$@", $request, $matches)) {
$keyword = isset($matches[1]) ? $matches[1] : '';
$keyword = yourls_sanitize_keyword($keyword);
ozh_preview_show($keyword);
die;
}
}
echo base64_decode("R0lGODlhEAAQAJECAAAAzFZWzP///wAAACH5BAEAAAIALAAAAAAQABAAAAIplI+py+0PUQAgSGoNQFt0LWTVOE6GuX1H6onTVHaW2tEHnJ1YxPc+UwAAOw==");
exit;
}
// Handle inexistent root robots.txt requests and exit
if ('/robots.txt' == $_SERVER['REQUEST_URI']) {
header('Content-Type: text/plain; charset=utf-8');
echo "User-agent: *\n";
echo "Disallow:\n";
exit;
}
// Start YOURLS
require_once dirname(__FILE__) . '/includes/load-yourls.php';
// Get request in YOURLS base (eg in 'http://site.com/yourls/abcd' get 'abdc')
$request = yourls_get_request();
// Make valid regexp pattern from authorized charset in keywords
$pattern = yourls_make_regexp_pattern(yourls_get_shorturl_charset());
// Now load required template and exit
yourls_do_action('pre_load_template', $request);
// At this point, $request is not sanitized. Sanitize in loaded template.
// Redirection:
if (preg_match("@^([{$pattern}]+)/?\$@", $request, $matches)) {
$keyword = isset($matches[1]) ? $matches[1] : '';
$keyword = yourls_sanitize_keyword($keyword);
yourls_do_action('load_template_go', $keyword);
require_once YOURLS_ABSPATH . '/yourls-go.php';
exit;
}
// Stats:
if (preg_match("@^([{$pattern}]+)\\+(all)?/?\$@", $request, $matches)) {
$keyword = isset($matches[1]) ? $matches[1] : '';
$keyword = yourls_sanitize_keyword($keyword);
/**
* Generate random string of (int)$length length and type $type (see function for details)
*
*/
function yourls_rnd_string($length = 5, $type = 0, $charlist = '')
{
$str = '';
$length = intval($length);
// define possible characters
switch ($type) {
// custom char list, or comply to charset as defined in config
case '0':
$possible = $charlist ? $charlist : yourls_get_shorturl_charset();
break;
// no vowels to make no offending word, no 0/1/o/l to avoid confusion between letters & digits. Perfect for passwords.
// no vowels to make no offending word, no 0/1/o/l to avoid confusion between letters & digits. Perfect for passwords.
case '1':
$possible = "23456789bcdfghjkmnpqrstvwxyz";
break;
// Same, with lower + upper
// Same, with lower + upper
case '2':
$possible = "23456789bcdfghjkmnpqrstvwxyzBCDFGHJKMNPQRSTVWXYZ";
break;
// all letters, lowercase
// all letters, lowercase
case '3':
$possible = "abcdefghijklmnopqrstuvwxyz";
break;
// all letters, lowercase + uppercase
// all letters, lowercase + uppercase
case '4':
$possible = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
break;
// all digits & letters lowercase
// all digits & letters lowercase
case '5':
$possible = "0123456789abcdefghijklmnopqrstuvwxyz";
break;
// all digits & letters lowercase + uppercase
// all digits & letters lowercase + uppercase
case '6':
$possible = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
break;
}
$str = substr(str_shuffle($possible), 0, $length);
return yourls_apply_filter('rnd_string', $str, $length, $type, $charlist);
}