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<?php |
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namespace TYPO3\PharStreamWrapper\Resolver; |
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/* |
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* This file is part of the TYPO3 project. |
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* |
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* It is free software; you can redistribute it and/or modify it under the terms |
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* of the MIT License (MIT). For the full copyright and license information, |
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* please read the LICENSE file that was distributed with this source code. |
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* |
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* The TYPO3 project - inspiring people to share! |
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*/ |
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use TYPO3\PharStreamWrapper\Helper; |
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use TYPO3\PharStreamWrapper\Manager; |
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use TYPO3\PharStreamWrapper\Phar\Reader; |
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use TYPO3\PharStreamWrapper\Resolvable; |
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class PharInvocationResolver implements Resolvable |
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{ |
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const RESOLVE_REALPATH = 1; |
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const RESOLVE_ALIAS = 2; |
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const ASSERT_INTERNAL_INVOCATION = 32; |
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/** |
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* @var string[] |
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*/ |
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private $invocationFunctionNames = array( |
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'include', |
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'include_once', |
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'require', |
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'require_once' |
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); |
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/** |
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* Resolves PharInvocation value object (baseName and optional alias). |
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* |
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* Phar aliases are intended to be used only inside Phar archives, however |
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* PharStreamWrapper needs this information exposed outside of Phar as well |
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* It is possible that same alias is used for different $baseName values. |
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* That's why PharInvocationCollection behaves like a stack when resolving |
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* base-name for a given alias. On the other hand it is not possible that |
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* one $baseName is referring to multiple aliases. |
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* @see https://secure.php.net/manual/en/phar.setalias.php |
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* @see https://secure.php.net/manual/en/phar.mapphar.php |
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* |
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* @param string $path |
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* @param int|null $flags |
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* @return null|PharInvocation |
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*/ |
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public function resolve($path, $flags = null) |
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{ |
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$hasPharPrefix = Helper::hasPharPrefix($path); |
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if ($flags === null) { |
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$flags = static::RESOLVE_REALPATH | static::RESOLVE_ALIAS | static::ASSERT_INTERNAL_INVOCATION; |
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} |
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if ($hasPharPrefix && $flags & static::RESOLVE_ALIAS) { |
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$invocation = $this->findByAlias($path); |
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if ($invocation !== null && $this->assertInternalInvocation($invocation, $flags)) { |
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return $invocation; |
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} elseif ($invocation !== null) { |
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return null; |
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} |
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} |
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$baseName = Helper::determineBaseFile($path); |
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if ($baseName === null) { |
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return null; |
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} |
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if ($flags & static::RESOLVE_REALPATH) { |
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$baseName = realpath($baseName); |
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} |
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if ($flags & static::RESOLVE_ALIAS) { |
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$reader = new Reader($baseName); |
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$alias = $reader->resolveContainer()->getAlias(); |
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} else { |
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$alias = ''; |
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} |
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return new PharInvocation($baseName, $alias); |
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} |
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/** |
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* @param string $path |
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* @return null|PharInvocation |
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*/ |
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private function findByAlias($path) |
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{ |
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$normalizedPath = Helper::normalizePath($path); |
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$possibleAlias = strstr($normalizedPath, '/', true); |
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if (empty($possibleAlias)) { |
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return null; |
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} |
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return Manager::instance()->getCollection()->findByCallback( |
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function (PharInvocation $candidate) use ($possibleAlias) { |
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return $candidate->getAlias() === $possibleAlias; |
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}, |
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true |
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); |
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} |
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/** |
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* @param PharInvocation $invocation |
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* @param int $flags |
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* @return bool |
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* @experimental |
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*/ |
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private function assertInternalInvocation(PharInvocation $invocation, $flags) |
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{ |
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if (!($flags & static::ASSERT_INTERNAL_INVOCATION)) { |
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return true; |
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} |
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$trace = debug_backtrace(0); |
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$firstIndex = count($trace) - 1; |
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// initial invocation, most probably a CLI tool |
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if (isset($trace[$firstIndex]['file']) && $trace[$firstIndex]['file'] === $invocation->getBaseName()) { |
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return true; |
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} |
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// otherwise search for include/require invocations |
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foreach ($trace as $item) { |
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if (!isset($item['function']) || !isset($item['args'][0])) { |
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continue; |
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} |
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if ($item['args'][0] === $invocation->getBaseName() |
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&& in_array($item['function'], $this->invocationFunctionNames, true) |
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) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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TYPO3 /
phar-stream-wrapper
