/usr/share/php/sabre21/Sabre/HTTP/URLUtil.php is in php-sabre-http-3 3.0.5-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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namespace Sabre\HTTP;
/**
* URL utility class
*
* This class provides methods to deal with encoding and decoding url (percent encoded) strings.
*
* It was not possible to use PHP's built-in methods for this, because some clients don't like
* encoding of certain characters.
*
* Specifically, it was found that GVFS (gnome's webdav client) does not like encoding of ( and
* ). Since these are reserved, but don't have a reserved meaning in url, these characters are
* kept as-is.
*
* @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class URLUtil {
/**
* Encodes the path of a url.
*
* slashes (/) are treated as path-separators.
*
* @param string $path
* @return string
*/
static function encodePath($path) {
return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\)\/:@])/',function($match) {
return '%'.sprintf('%02x',ord($match[0]));
}, $path);
}
/**
* Encodes a 1 segment of a path
*
* Slashes are considered part of the name, and are encoded as %2f
*
* @param string $pathSegment
* @return string
*/
static function encodePathSegment($pathSegment) {
return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\):@])/',function($match) {
return '%'.sprintf('%02x',ord($match[0]));
}, $pathSegment);
}
/**
* Decodes a url-encoded path
*
* @param string $path
* @return string
*/
static function decodePath($path) {
return self::decodePathSegment($path);
}
/**
* Decodes a url-encoded path segment
*
* @param string $path
* @return string
*/
static function decodePathSegment($path) {
$path = rawurldecode($path);
$encoding = mb_detect_encoding($path, ['UTF-8','ISO-8859-1']);
switch($encoding) {
case 'ISO-8859-1' :
$path = utf8_encode($path);
}
return $path;
}
/**
* Returns the 'dirname' and 'basename' for a path.
*
* The reason there is a custom function for this purpose, is because
* basename() is locale aware (behaviour changes if C locale or a UTF-8 locale is used)
* and we need a method that just operates on UTF-8 characters.
*
* In addition basename and dirname are platform aware, and will treat backslash (\) as a
* directory separator on windows.
*
* This method returns the 2 components as an array.
*
* If there is no dirname, it will return an empty string. Any / appearing at the end of the
* string is stripped off.
*
* @param string $path
* @return array
*/
static function splitPath($path) {
$matches = [];
if(preg_match('/^(?:(.*)\/+)?([^\/]+)\/?$/u',$path,$matches)) {
return [$matches[1], $matches[2]];
} else {
return [null, null];
}
}
/**
* Resolves relative urls, like a browser would.
*
* This function takes a basePath, which itself _may_ also be relative, and
* then applies the relative path on top of it.
*
* @param string $basePath
* @param string $newPath
* @return string
*/
static function resolve($basePath, $newPath) {
$base = parse_url($basePath);
$delta = parse_url($newPath);
$pick = function($part) use ($base, $delta) {
if (isset($delta[$part])) {
return $delta[$part];
} elseif (isset($base[$part])) {
return $base[$part];
} else {
return null;
}
};
$url = '';
$scheme = $pick('scheme');
$host = $pick('host');
if ($scheme) {
// If there's a scheme, there's also a host.
$url=$scheme.'://' . $host;
} elseif (!$scheme && $host) {
// No scheme, but there is a host.
$url = '//' . $host;
}
$port = $pick('port');
if ($port) {
// tcp port.
$url.=':' . $port;
}
$path = '';
if (isset($delta['path'])) {
// If the path starts with a slash
if ($delta['path'][0]==='/') {
$path = $delta['path'];
} else {
// Removing last component from base path.
$path = $base['path'];
if (strpos($path, '/')!==false) {
$path = substr($path,0,strrpos($path,'/'));
}
$path.='/' . $delta['path'];
}
} else {
$path = isset($base['path'])?$base['path']:'/';
}
// Removing .. and .
$pathParts = explode('/', $path);
$newPathParts = [];
foreach($pathParts as $pathPart) {
switch($pathPart) {
case '' :
case '.' :
break;
case '..' :
array_pop($newPathParts);
break;
default :
$newPathParts[] = $pathPart;
break;
}
}
$url.='/' . implode('/', $newPathParts);
// If the source url ended with a /, we want to preserve that.
if (substr($path, -1) === '/' && $path!=='/') {
$url.='/';
}
if (isset($delta['query'])) {
$url.='?' . $delta['query'];
}
if (isset($delta['fragment'])) {
$url.='#' . $delta['fragment'];
}
return $url;
}
}
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