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Diffstat (limited to 'vendor/guzzlehttp/psr7/src/UriResolver.php')
| -rw-r--r-- | vendor/guzzlehttp/psr7/src/UriResolver.php | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/vendor/guzzlehttp/psr7/src/UriResolver.php b/vendor/guzzlehttp/psr7/src/UriResolver.php new file mode 100644 index 0000000..38d5793 --- /dev/null +++ b/vendor/guzzlehttp/psr7/src/UriResolver.php @@ -0,0 +1,211 @@ +<?php + +declare(strict_types=1); + +namespace GuzzleHttp\Psr7; + +use Psr\Http\Message\UriInterface; + +/** + * Resolves a URI reference in the context of a base URI and the opposite way. + * + * @author Tobias Schultze + * + * @see https://tools.ietf.org/html/rfc3986#section-5 + */ +final class UriResolver +{ + /** + * Removes dot segments from a path and returns the new path. + * + * @see http://tools.ietf.org/html/rfc3986#section-5.2.4 + */ + public static function removeDotSegments(string $path): string + { + if ($path === '' || $path === '/') { + return $path; + } + + $results = []; + $segments = explode('/', $path); + foreach ($segments as $segment) { + if ($segment === '..') { + array_pop($results); + } elseif ($segment !== '.') { + $results[] = $segment; + } + } + + $newPath = implode('/', $results); + + if ($path[0] === '/' && (!isset($newPath[0]) || $newPath[0] !== '/')) { + // Re-add the leading slash if necessary for cases like "/.." + $newPath = '/'.$newPath; + } elseif ($newPath !== '' && ($segment === '.' || $segment === '..')) { + // Add the trailing slash if necessary + // If newPath is not empty, then $segment must be set and is the last segment from the foreach + $newPath .= '/'; + } + + return $newPath; + } + + /** + * Converts the relative URI into a new URI that is resolved against the base URI. + * + * @see http://tools.ietf.org/html/rfc3986#section-5.2 + */ + public static function resolve(UriInterface $base, UriInterface $rel): UriInterface + { + if ((string) $rel === '') { + // we can simply return the same base URI instance for this same-document reference + return $base; + } + + if ($rel->getScheme() != '') { + return $rel->withPath(self::removeDotSegments($rel->getPath())); + } + + if ($rel->getAuthority() != '') { + $targetAuthority = $rel->getAuthority(); + $targetPath = self::removeDotSegments($rel->getPath()); + $targetQuery = $rel->getQuery(); + } else { + $targetAuthority = $base->getAuthority(); + if ($rel->getPath() === '') { + $targetPath = $base->getPath(); + $targetQuery = $rel->getQuery() != '' ? $rel->getQuery() : $base->getQuery(); + } else { + if ($rel->getPath()[0] === '/') { + $targetPath = $rel->getPath(); + } else { + if ($targetAuthority != '' && $base->getPath() === '') { + $targetPath = '/'.$rel->getPath(); + } else { + $lastSlashPos = strrpos($base->getPath(), '/'); + if ($lastSlashPos === false) { + $targetPath = $rel->getPath(); + } else { + $targetPath = substr($base->getPath(), 0, $lastSlashPos + 1).$rel->getPath(); + } + } + } + $targetPath = self::removeDotSegments($targetPath); + $targetQuery = $rel->getQuery(); + } + } + + return new Uri(Uri::composeComponents( + $base->getScheme(), + $targetAuthority, + $targetPath, + $targetQuery, + $rel->getFragment() + )); + } + + /** + * Returns the target URI as a relative reference from the base URI. + * + * This method is the counterpart to resolve(): + * + * (string) $target === (string) UriResolver::resolve($base, UriResolver::relativize($base, $target)) + * + * One use-case is to use the current request URI as base URI and then generate relative links in your documents + * to reduce the document size or offer self-contained downloadable document archives. + * + * $base = new Uri('http://example.com/a/b/'); + * echo UriResolver::relativize($base, new Uri('http://example.com/a/b/c')); // prints 'c'. + * echo UriResolver::relativize($base, new Uri('http://example.com/a/x/y')); // prints '../x/y'. + * echo UriResolver::relativize($base, new Uri('http://example.com/a/b/?q')); // prints '?q'. + * echo UriResolver::relativize($base, new Uri('http://example.org/a/b/')); // prints '//example.org/a/b/'. + * + * This method also accepts a target that is already relative and will try to relativize it further. Only a + * relative-path reference will be returned as-is. + * + * echo UriResolver::relativize($base, new Uri('/a/b/c')); // prints 'c' as well + */ + public static function relativize(UriInterface $base, UriInterface $target): UriInterface + { + if ($target->getScheme() !== '' + && ($base->getScheme() !== $target->getScheme() || $target->getAuthority() === '' && $base->getAuthority() !== '') + ) { + return $target; + } + + if (Uri::isRelativePathReference($target)) { + // As the target is already highly relative we return it as-is. It would be possible to resolve + // the target with `$target = self::resolve($base, $target);` and then try make it more relative + // by removing a duplicate query. But let's not do that automatically. + return $target; + } + + if ($target->getAuthority() !== '' && $base->getAuthority() !== $target->getAuthority()) { + return $target->withScheme(''); + } + + // We must remove the path before removing the authority because if the path starts with two slashes, the URI + // would turn invalid. And we also cannot set a relative path before removing the authority, as that is also + // invalid. + $emptyPathUri = $target->withScheme('')->withPath('')->withUserInfo('')->withPort(null)->withHost(''); + + if ($base->getPath() !== $target->getPath()) { + return $emptyPathUri->withPath(self::getRelativePath($base, $target)); + } + + if ($base->getQuery() === $target->getQuery()) { + // Only the target fragment is left. And it must be returned even if base and target fragment are the same. + return $emptyPathUri->withQuery(''); + } + + // If the base URI has a query but the target has none, we cannot return an empty path reference as it would + // inherit the base query component when resolving. + if ($target->getQuery() === '') { + $segments = explode('/', $target->getPath()); + /** @var string $lastSegment */ + $lastSegment = end($segments); + + return $emptyPathUri->withPath($lastSegment === '' ? './' : $lastSegment); + } + + return $emptyPathUri; + } + + private static function getRelativePath(UriInterface $base, UriInterface $target): string + { + $sourceSegments = explode('/', $base->getPath()); + $targetSegments = explode('/', $target->getPath()); + array_pop($sourceSegments); + $targetLastSegment = array_pop($targetSegments); + foreach ($sourceSegments as $i => $segment) { + if (isset($targetSegments[$i]) && $segment === $targetSegments[$i]) { + unset($sourceSegments[$i], $targetSegments[$i]); + } else { + break; + } + } + $targetSegments[] = $targetLastSegment; + $relativePath = str_repeat('../', count($sourceSegments)).implode('/', $targetSegments); + + // A reference to am empty last segment or an empty first sub-segment must be prefixed with "./". + // This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used + // as the first segment of a relative-path reference, as it would be mistaken for a scheme name. + if ('' === $relativePath || false !== strpos(explode('/', $relativePath, 2)[0], ':')) { + $relativePath = "./$relativePath"; + } elseif ('/' === $relativePath[0]) { + if ($base->getAuthority() != '' && $base->getPath() === '') { + // In this case an extra slash is added by resolve() automatically. So we must not add one here. + $relativePath = ".$relativePath"; + } else { + $relativePath = "./$relativePath"; + } + } + + return $relativePath; + } + + private function __construct() + { + // cannot be instantiated + } +} |