331 lines
10 KiB
PHP
331 lines
10 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Cache\Adapter;
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use Symfony\Component\Cache\Exception\CacheException;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\PruneableInterface;
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use Symfony\Component\Cache\Traits\FilesystemCommonTrait;
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use Symfony\Component\VarExporter\VarExporter;
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/**
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* @author Piotr Stankowski <git@trakos.pl>
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* @author Nicolas Grekas <p@tchwork.com>
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* @author Rob Frawley 2nd <rmf@src.run>
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*/
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class PhpFilesAdapter extends AbstractAdapter implements PruneableInterface
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{
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use FilesystemCommonTrait {
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doClear as private doCommonClear;
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doDelete as private doCommonDelete;
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}
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private $includeHandler;
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private $appendOnly;
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private $values = [];
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private $files = [];
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private static $startTime;
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private static $valuesCache = [];
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/**
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* @param $appendOnly Set to `true` to gain extra performance when the items stored in this pool never expire.
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* Doing so is encouraged because it fits perfectly OPcache's memory model.
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*
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* @throws CacheException if OPcache is not enabled
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*/
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public function __construct(string $namespace = '', int $defaultLifetime = 0, ?string $directory = null, bool $appendOnly = false)
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{
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$this->appendOnly = $appendOnly;
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self::$startTime = self::$startTime ?? $_SERVER['REQUEST_TIME'] ?? time();
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parent::__construct('', $defaultLifetime);
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$this->init($namespace, $directory);
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$this->includeHandler = static function ($type, $msg, $file, $line) {
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throw new \ErrorException($msg, 0, $type, $file, $line);
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};
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}
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public static function isSupported()
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{
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self::$startTime = self::$startTime ?? $_SERVER['REQUEST_TIME'] ?? time();
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return \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOLEAN) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOLEAN));
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}
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/**
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* @return bool
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*/
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public function prune()
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{
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$time = time();
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$pruned = true;
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$getExpiry = true;
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set_error_handler($this->includeHandler);
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try {
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foreach ($this->scanHashDir($this->directory) as $file) {
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try {
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if (\is_array($expiresAt = include $file)) {
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$expiresAt = $expiresAt[0];
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}
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} catch (\ErrorException $e) {
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$expiresAt = $time;
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}
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if ($time >= $expiresAt) {
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$pruned = ($this->doUnlink($file) || !file_exists($file)) && $pruned;
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}
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}
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} finally {
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restore_error_handler();
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}
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return $pruned;
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}
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/**
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* {@inheritdoc}
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*/
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protected function doFetch(array $ids)
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{
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if ($this->appendOnly) {
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$now = 0;
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$missingIds = [];
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} else {
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$now = time();
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$missingIds = $ids;
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$ids = [];
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}
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$values = [];
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begin:
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$getExpiry = false;
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foreach ($ids as $id) {
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if (null === $value = $this->values[$id] ?? null) {
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$missingIds[] = $id;
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} elseif ('N;' === $value) {
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$values[$id] = null;
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} elseif (!\is_object($value)) {
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$values[$id] = $value;
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} elseif (!$value instanceof LazyValue) {
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$values[$id] = $value();
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} elseif (false === $values[$id] = include $value->file) {
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unset($values[$id], $this->values[$id]);
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$missingIds[] = $id;
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}
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if (!$this->appendOnly) {
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unset($this->values[$id]);
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}
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}
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if (!$missingIds) {
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return $values;
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}
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set_error_handler($this->includeHandler);
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try {
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$getExpiry = true;
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foreach ($missingIds as $k => $id) {
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try {
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$file = $this->files[$id] ?? $this->files[$id] = $this->getFile($id);
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if (isset(self::$valuesCache[$file])) {
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[$expiresAt, $this->values[$id]] = self::$valuesCache[$file];
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} elseif (\is_array($expiresAt = include $file)) {
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if ($this->appendOnly) {
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self::$valuesCache[$file] = $expiresAt;
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}
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[$expiresAt, $this->values[$id]] = $expiresAt;
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} elseif ($now < $expiresAt) {
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$this->values[$id] = new LazyValue($file);
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}
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if ($now >= $expiresAt) {
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unset($this->values[$id], $missingIds[$k], self::$valuesCache[$file]);
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}
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} catch (\ErrorException $e) {
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unset($missingIds[$k]);
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}
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}
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} finally {
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restore_error_handler();
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}
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$ids = $missingIds;
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$missingIds = [];
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goto begin;
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}
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/**
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* {@inheritdoc}
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*/
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protected function doHave(string $id)
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{
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if ($this->appendOnly && isset($this->values[$id])) {
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return true;
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}
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set_error_handler($this->includeHandler);
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try {
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$file = $this->files[$id] ?? $this->files[$id] = $this->getFile($id);
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$getExpiry = true;
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if (isset(self::$valuesCache[$file])) {
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[$expiresAt, $value] = self::$valuesCache[$file];
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} elseif (\is_array($expiresAt = include $file)) {
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if ($this->appendOnly) {
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self::$valuesCache[$file] = $expiresAt;
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}
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[$expiresAt, $value] = $expiresAt;
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} elseif ($this->appendOnly) {
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$value = new LazyValue($file);
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}
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} catch (\ErrorException $e) {
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return false;
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} finally {
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restore_error_handler();
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}
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if ($this->appendOnly) {
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$now = 0;
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$this->values[$id] = $value;
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} else {
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$now = time();
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}
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return $now < $expiresAt;
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}
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/**
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* {@inheritdoc}
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*/
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protected function doSave(array $values, int $lifetime)
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{
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$ok = true;
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$expiry = $lifetime ? time() + $lifetime : 'PHP_INT_MAX';
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$allowCompile = self::isSupported();
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foreach ($values as $key => $value) {
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unset($this->values[$key]);
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$isStaticValue = true;
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if (null === $value) {
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$value = "'N;'";
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} elseif (\is_object($value) || \is_array($value)) {
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try {
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$value = VarExporter::export($value, $isStaticValue);
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} catch (\Exception $e) {
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throw new InvalidArgumentException(sprintf('Cache key "%s" has non-serializable "%s" value.', $key, get_debug_type($value)), 0, $e);
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}
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} elseif (\is_string($value)) {
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// Wrap "N;" in a closure to not confuse it with an encoded `null`
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if ('N;' === $value) {
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$isStaticValue = false;
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}
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$value = var_export($value, true);
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} elseif (!\is_scalar($value)) {
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throw new InvalidArgumentException(sprintf('Cache key "%s" has non-serializable "%s" value.', $key, get_debug_type($value)));
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} else {
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$value = var_export($value, true);
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}
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$encodedKey = rawurlencode($key);
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if ($isStaticValue) {
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$value = "return [{$expiry}, {$value}];";
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} elseif ($this->appendOnly) {
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$value = "return [{$expiry}, static function () { return {$value}; }];";
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} else {
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// We cannot use a closure here because of https://bugs.php.net/76982
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$value = str_replace('\Symfony\Component\VarExporter\Internal\\', '', $value);
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$value = "namespace Symfony\Component\VarExporter\Internal;\n\nreturn \$getExpiry ? {$expiry} : {$value};";
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}
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$file = $this->files[$key] = $this->getFile($key, true);
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// Since OPcache only compiles files older than the script execution start, set the file's mtime in the past
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$ok = $this->write($file, "<?php //{$encodedKey}\n\n{$value}\n", self::$startTime - 10) && $ok;
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if ($allowCompile) {
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@opcache_invalidate($file, true);
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@opcache_compile_file($file);
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}
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unset(self::$valuesCache[$file]);
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}
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if (!$ok && !is_writable($this->directory)) {
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throw new CacheException(sprintf('Cache directory is not writable (%s).', $this->directory));
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}
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return $ok;
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}
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/**
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* {@inheritdoc}
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*/
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protected function doClear(string $namespace)
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{
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$this->values = [];
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return $this->doCommonClear($namespace);
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}
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/**
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* {@inheritdoc}
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*/
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protected function doDelete(array $ids)
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{
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foreach ($ids as $id) {
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unset($this->values[$id]);
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}
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return $this->doCommonDelete($ids);
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}
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protected function doUnlink(string $file)
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{
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unset(self::$valuesCache[$file]);
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if (self::isSupported()) {
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@opcache_invalidate($file, true);
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}
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return @unlink($file);
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}
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private function getFileKey(string $file): string
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{
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if (!$h = @fopen($file, 'r')) {
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return '';
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}
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$encodedKey = substr(fgets($h), 8);
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fclose($h);
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return rawurldecode(rtrim($encodedKey));
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}
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}
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/**
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* @internal
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*/
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class LazyValue
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{
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public $file;
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public function __construct(string $file)
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{
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$this->file = $file;
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}
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}
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