镜像来自
https://github.com/nextcloud/server.git
synced 2024-08-26 17:55:04 +02:00
184 line
5.2 KiB
PHP
184 line
5.2 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Andreas Fischer <bantu@owncloud.com>
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* @author Georg Ehrke <georg@owncloud.com>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Markus Goetz <markus@woboq.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC;
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use \OCP\AutoloadNotAllowedException;
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class Autoloader {
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/** @var bool */
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private $useGlobalClassPath = true;
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/** @var array */
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private $validRoots = [];
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/**
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* Optional low-latency memory cache for class to path mapping.
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*
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* @var \OC\Memcache\Cache
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*/
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protected $memoryCache;
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/**
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* Autoloader constructor.
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*
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* @param string[] $validRoots
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*/
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public function __construct(array $validRoots) {
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foreach ($validRoots as $root) {
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$this->validRoots[$root] = true;
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}
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}
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/**
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* Add a path to the list of valid php roots for auto loading
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*
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* @param string $root
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*/
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public function addValidRoot($root) {
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$root = stream_resolve_include_path($root);
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$this->validRoots[$root] = true;
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}
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/**
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* disable the usage of the global classpath \OC::$CLASSPATH
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*/
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public function disableGlobalClassPath() {
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$this->useGlobalClassPath = false;
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}
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/**
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* enable the usage of the global classpath \OC::$CLASSPATH
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*/
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public function enableGlobalClassPath() {
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$this->useGlobalClassPath = true;
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}
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/**
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* get the possible paths for a class
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*
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* @param string $class
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* @return array|bool an array of possible paths or false if the class is not part of ownCloud
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*/
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public function findClass($class) {
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$class = trim($class, '\\');
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$paths = array();
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if ($this->useGlobalClassPath && array_key_exists($class, \OC::$CLASSPATH)) {
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$paths[] = \OC::$CLASSPATH[$class];
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/**
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* @TODO: Remove this when necessary
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* Remove "apps/" from inclusion path for smooth migration to multi app dir
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*/
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if (strpos(\OC::$CLASSPATH[$class], 'apps/') === 0) {
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\OCP\Util::writeLog('core', 'include path for class "' . $class . '" starts with "apps/"', \OCP\Util::DEBUG);
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$paths[] = str_replace('apps/', '', \OC::$CLASSPATH[$class]);
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}
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} elseif (strpos($class, 'OC_') === 0) {
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$paths[] = \OC::$SERVERROOT . '/lib/private/legacy/' . strtolower(str_replace('_', '/', substr($class, 3)) . '.php');
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} elseif (strpos($class, 'OCA\\') === 0) {
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list(, $app, $rest) = explode('\\', $class, 3);
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$app = strtolower($app);
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$appPath = \OC_App::getAppPath($app);
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if ($appPath && stream_resolve_include_path($appPath)) {
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$paths[] = $appPath . '/' . strtolower(str_replace('\\', '/', $rest) . '.php');
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// If not found in the root of the app directory, insert '/lib' after app id and try again.
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$paths[] = $appPath . '/lib/' . strtolower(str_replace('\\', '/', $rest) . '.php');
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}
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} elseif ($class === 'Test\\TestCase') {
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// This File is considered public API, so we make sure that the class
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// can still be loaded, although the PSR-4 paths have not been loaded.
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$paths[] = \OC::$SERVERROOT . '/tests/lib/TestCase.php';
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}
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return $paths;
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}
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/**
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* @param string $fullPath
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* @return bool
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*/
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protected function isValidPath($fullPath) {
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foreach ($this->validRoots as $root => $true) {
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if (substr($fullPath, 0, strlen($root) + 1) === $root . '/') {
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return true;
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}
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}
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throw new AutoloadNotAllowedException($fullPath);
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}
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/**
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* Load the specified class
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*
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* @param string $class
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* @return bool
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*/
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public function load($class) {
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$pathsToRequire = null;
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if ($this->memoryCache) {
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$pathsToRequire = $this->memoryCache->get($class);
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}
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if(class_exists($class, false)) {
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return false;
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}
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if (!is_array($pathsToRequire)) {
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// No cache or cache miss
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$pathsToRequire = array();
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foreach ($this->findClass($class) as $path) {
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$fullPath = stream_resolve_include_path($path);
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if ($fullPath && $this->isValidPath($fullPath)) {
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$pathsToRequire[] = $fullPath;
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}
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}
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if ($this->memoryCache) {
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$this->memoryCache->set($class, $pathsToRequire, 60); // cache 60 sec
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}
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}
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foreach ($pathsToRequire as $fullPath) {
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require_once $fullPath;
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}
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return false;
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}
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/**
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* Sets the optional low-latency cache for class to path mapping.
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*
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* @param \OC\Memcache\Cache $memoryCache Instance of memory cache.
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*/
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public function setMemoryCache(\OC\Memcache\Cache $memoryCache = null) {
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$this->memoryCache = $memoryCache;
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}
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}
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