Viewing file:  UriResolver.php (3.5 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DomCrawler;
/**
* The UriResolver class takes an URI (relative, absolute, fragment, etc.)
* and turns it into an absolute URI against another given base URI.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Grégoire Pineau <lyrixx@lyrixx.info>
*/
class UriResolver
{
/**
* Resolves a URI according to a base URI.
*
* For example if $uri=/foo/bar and $baseUri=https://symfony.com it will
* return https://symfony.com/foo/bar
*
* If the $uri is not absolute you must pass an absolute $baseUri
*/
public static function resolve(string $uri, ?string $baseUri): string
{
$uri = trim($uri);
// absolute URL?
if (null !== parse_url($uri, \PHP_URL_SCHEME)) {
return $uri;
}
if (null === $baseUri) {
throw new \InvalidArgumentException('The URI is relative, so you must define its base URI passing an absolute URL.');
}
// empty URI
if (!$uri) {
return $baseUri;
}
// an anchor
if ('#' === $uri[0]) {
return self::cleanupAnchor($baseUri).$uri;
}
$baseUriCleaned = self::cleanupUri($baseUri);
if ('?' === $uri[0]) {
return $baseUriCleaned.$uri;
}
// absolute URL with relative schema
if (0 === strpos($uri, '//')) {
return preg_replace('#^([^/]*)//.*$#', '$1', $baseUriCleaned).$uri;
}
$baseUriCleaned = preg_replace('#^(.*?//[^/]*)(?:\/.*)?$#', '$1', $baseUriCleaned);
// absolute path
if ('/' === $uri[0]) {
return $baseUriCleaned.$uri;
}
// relative path
$path = parse_url(substr($baseUri, \strlen($baseUriCleaned)), \PHP_URL_PATH) ?? '';
$path = self::canonicalizePath(substr($path, 0, strrpos($path, '/')).'/'.$uri);
return $baseUriCleaned.('' === $path || '/' !== $path[0] ? '/' : '').$path;
}
/**
* Returns the canonicalized URI path (see RFC 3986, section 5.2.4).
*/
private static function canonicalizePath(string $path): string
{
if ('' === $path || '/' === $path) {
return $path;
}
if ('.' === substr($path, -1)) {
$path .= '/';
}
$output = [];
foreach (explode('/', $path) as $segment) {
if ('..' === $segment) {
array_pop($output);
} elseif ('.' !== $segment) {
$output[] = $segment;
}
}
return implode('/', $output);
}
/**
* Removes the query string and the anchor from the given uri.
*/
private static function cleanupUri(string $uri): string
{
return self::cleanupQuery(self::cleanupAnchor($uri));
}
/**
* Removes the query string from the uri.
*/
private static function cleanupQuery(string $uri): string
{
if (false !== $pos = strpos($uri, '?')) {
return substr($uri, 0, $pos);
}
return $uri;
}
/**
* Removes the anchor from the uri.
*/
private static function cleanupAnchor(string $uri): string
{
if (false !== $pos = strpos($uri, '#')) {
return substr($uri, 0, $pos);
}
return $uri;
}
}
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