/**
* Rewrite a file relative URI as root relative
*
* <code>
* Minify_CSS_UriRewriter::rewriteRelative(
* '../img/hello.gif'
* , '/home/user/www/css' // path of CSS file
* , '/home/user/www' // doc root
* );
* // returns '/img/hello.gif'
*
* // example where static files are stored in a symlinked directory
* Minify_CSS_UriRewriter::rewriteRelative(
* 'hello.gif'
* , '/var/staticFiles/theme'
* , '/home/user/www'
* , array('/home/user/www/static' => '/var/staticFiles')
* );
* // returns '/static/theme/hello.gif'
* </code>
*
* @param string $uri file relative URI
*
* @param string $realCurrentDir realpath of the current file's directory.
*
* @param string $realDocRoot realpath of the site document root.
*
* @param array $symlinks (default = array()) If the file is stored in
* a symlink-ed directory, provide an array of link paths to
* real target paths, where the link paths "appear" to be within the document
* root. E.g.:
* <code>
* array('/home/foo/www/not/real/path' => '/real/target/path') // unix
* array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows
* </code>
*
* @return string
*/
public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array())
{
if ('/' === $uri[0]) {
// root-relative
return $uri;
}
// prepend path with current dir separator (OS-independent)
$path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR);
self::$debugText .= "file-relative URI : {$uri}\n" . "path prepended : {$path}\n";
// "unresolve" a symlink back to doc root
foreach ($symlinks as $link => $target) {
if (0 === strpos($path, $target)) {
// replace $target with $link
$path = $link . substr($path, strlen($target));
self::$debugText .= "symlink unresolved : {$path}\n";
break;
}
}
// strip doc root
$path = substr($path, strlen($realDocRoot));
self::$debugText .= "docroot stripped : {$path}\n";
// fix to root-relative URI
$uri = strtr($path, '/\\', '//');
// remove /./ and /../ where possible
$uri = str_replace('/./', '/', $uri);
// inspired by patch from Oleg Cherniy
do {
$uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed);
} while ($changed);
self::$debugText .= "traversals removed : {$uri}\n\n";
$uri = str_replace(w3_get_site_path(), w3_get_blog_path(), $uri);
return $uri;
}
/**
* Link replace callback
*
* @param array $matches
* @return string
*/
function link_replace_callback($matches)
{
global $wpdb;
static $queue = null, $reject_files = null;
list($match, $quote, $url, $site_url, $path) = $matches;
$path = ltrim($path, '/');
/**
* Check if URL was already replaced
*/
if (isset($this->replaced_urls[$url])) {
return $quote . $this->replaced_urls[$url];
}
/**
* Check URL for rejected files
*/
if ($reject_files === null) {
$reject_files = $this->_config->get_array('cdn.reject.files');
}
foreach ($reject_files as $reject_file) {
if ($reject_file != '') {
$reject_file = w3_normalize_file($reject_file);
$reject_file_regexp = '~^' . $this->get_regexp_by_mask($reject_file) . '$~i';
if (preg_match($reject_file_regexp, $path)) {
return $quote . $url;
}
}
}
/**
* Don't replace URL for files that are in the CDN queue
*/
if ($queue === null) {
$sql = sprintf('SELECT remote_path FROM %s', $wpdb->prefix . W3TC_CDN_TABLE_QUEUE);
$queue = $wpdb->get_col($sql);
}
if (in_array($path, $queue)) {
return $quote . $url;
}
/**
* Do replacement
*/
$cdn =& $this->get_cdn();
$blog_path = w3_get_blog_path();
$new_path = $blog_path . $path;
$new_url = $cdn->format_url($new_path);
if ($new_url) {
$this->replaced_urls[$url] = $new_url;
return $quote . $new_url;
}
return $quote . $url;
}
