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Util.php 19 KB

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  1. <?php
  2. /**
  3. * @copyright Copyright (c) 2016, ownCloud, Inc.
  4. *
  5. * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
  6. * @author Bart Visscher <bartv@thisnet.nl>
  7. * @author Björn Schießle <bjoern@schiessle.org>
  8. * @author Christoph Wurst <christoph@winzerhof-wurst.at>
  9. * @author Frank Karlitschek <frank@karlitschek.de>
  10. * @author Georg Ehrke <oc.list@georgehrke.com>
  11. * @author Individual IT Services <info@individual-it.net>
  12. * @author J0WI <J0WI@users.noreply.github.com>
  13. * @author Jens-Christian Fischer <jens-christian.fischer@switch.ch>
  14. * @author Joas Schilling <coding@schilljs.com>
  15. * @author Jonas Meurer <jonas@freesources.org>
  16. * @author Julius Härtl <jus@bitgrid.net>
  17. * @author Lukas Reschke <lukas@statuscode.ch>
  18. * @author Michael Gapczynski <GapczynskiM@gmail.com>
  19. * @author Morris Jobke <hey@morrisjobke.de>
  20. * @author Pellaeon Lin <nfsmwlin@gmail.com>
  21. * @author Randolph Carter <RandolphCarter@fantasymail.de>
  22. * @author Robin Appelman <robin@icewind.nl>
  23. * @author Robin McCorkell <robin@mccorkell.me.uk>
  24. * @author Roeland Jago Douma <roeland@famdouma.nl>
  25. * @author Thomas Müller <thomas.mueller@tmit.eu>
  26. * @author Victor Dubiniuk <dubiniuk@owncloud.com>
  27. * @author Vincent Petry <vincent@nextcloud.com>
  28. *
  29. * @license AGPL-3.0
  30. *
  31. * This code is free software: you can redistribute it and/or modify
  32. * it under the terms of the GNU Affero General Public License, version 3,
  33. * as published by the Free Software Foundation.
  34. *
  35. * This program is distributed in the hope that it will be useful,
  36. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  37. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  38. * GNU Affero General Public License for more details.
  39. *
  40. * You should have received a copy of the GNU Affero General Public License, version 3,
  41. * along with this program. If not, see <http://www.gnu.org/licenses/>
  42. *
  43. */
  44. // use OCP namespace for all classes that are considered public.
  45. // This means that they should be used by apps instead of the internal ownCloud classes
  46. namespace OCP;
  47. use OC\AppScriptDependency;
  48. use OC\AppScriptSort;
  49. use bantu\IniGetWrapper\IniGetWrapper;
  50. /**
  51. * This class provides different helper functions to make the life of a developer easier
  52. *
  53. * @since 4.0.0
  54. */
  55. class Util {
  56. /** @var \OCP\Share\IManager */
  57. private static $shareManager;
  58. /** @var array */
  59. private static $scripts = [];
  60. /** @var array */
  61. private static $scriptDeps = [];
  62. /** @var array */
  63. private static $sortedScriptDeps = [];
  64. /**
  65. * get the current installed version of Nextcloud
  66. * @return array
  67. * @since 4.0.0
  68. */
  69. public static function getVersion() {
  70. return \OC_Util::getVersion();
  71. }
  72. /**
  73. * @since 17.0.0
  74. */
  75. public static function hasExtendedSupport(): bool {
  76. try {
  77. /** @var \OCP\Support\Subscription\IRegistry */
  78. $subscriptionRegistry = \OC::$server->query(\OCP\Support\Subscription\IRegistry::class);
  79. return $subscriptionRegistry->delegateHasExtendedSupport();
  80. } catch (AppFramework\QueryException $e) {
  81. }
  82. return \OC::$server->getConfig()->getSystemValueBool('extendedSupport', false);
  83. }
  84. /**
  85. * Set current update channel
  86. * @param string $channel
  87. * @since 8.1.0
  88. */
  89. public static function setChannel($channel) {
  90. \OC::$server->getConfig()->setSystemValue('updater.release.channel', $channel);
  91. }
  92. /**
  93. * Get current update channel
  94. * @return string
  95. * @since 8.1.0
  96. */
  97. public static function getChannel() {
  98. return \OC_Util::getChannel();
  99. }
  100. /**
  101. * write a message in the log
  102. * @param string $app
  103. * @param string $message
  104. * @param int $level
  105. * @since 4.0.0
  106. * @deprecated 13.0.0 use log of \OCP\ILogger
  107. */
  108. public static function writeLog($app, $message, $level) {
  109. $context = ['app' => $app];
  110. \OC::$server->getLogger()->log($level, $message, $context);
  111. }
  112. /**
  113. * check if sharing is disabled for the current user
  114. *
  115. * @return boolean
  116. * @since 7.0.0
  117. * @deprecated 9.1.0 Use \OC::$server->getShareManager()->sharingDisabledForUser
  118. */
  119. public static function isSharingDisabledForUser() {
  120. if (self::$shareManager === null) {
  121. self::$shareManager = \OC::$server->getShareManager();
  122. }
  123. $user = \OC::$server->getUserSession()->getUser();
  124. if ($user !== null) {
  125. $user = $user->getUID();
  126. }
  127. return self::$shareManager->sharingDisabledForUser($user);
  128. }
  129. /**
  130. * get l10n object
  131. * @param string $application
  132. * @param string|null $language
  133. * @return \OCP\IL10N
  134. * @since 6.0.0 - parameter $language was added in 8.0.0
  135. */
  136. public static function getL10N($application, $language = null) {
  137. return \OC::$server->getL10N($application, $language);
  138. }
  139. /**
  140. * add a css file
  141. * @param string $application
  142. * @param string $file
  143. * @since 4.0.0
  144. */
  145. public static function addStyle($application, $file = null) {
  146. \OC_Util::addStyle($application, $file);
  147. }
  148. /**
  149. * add a javascript file
  150. *
  151. * @param string $application
  152. * @param string|null $file
  153. * @param string $afterAppId
  154. * @since 4.0.0
  155. */
  156. public static function addScript(string $application, string $file = null, string $afterAppId = 'core'): void {
  157. if (!empty($application)) {
  158. $path = "$application/js/$file";
  159. } else {
  160. $path = "js/$file";
  161. }
  162. // Inject js translations if we load a script for
  163. // a specific app that is not core, as those js files
  164. // need separate handling
  165. if ($application !== 'core'
  166. && $file !== null
  167. && strpos($file, 'l10n') === false) {
  168. self::addTranslations($application);
  169. }
  170. // store app in dependency list
  171. if (!array_key_exists($application, self::$scriptDeps)) {
  172. self::$scriptDeps[$application] = new AppScriptDependency($application, [$afterAppId]);
  173. } else {
  174. self::$scriptDeps[$application]->addDep($afterAppId);
  175. }
  176. self::$scripts[$application][] = $path;
  177. }
  178. /**
  179. * Return the list of scripts injected to the page
  180. *
  181. * @return array
  182. * @since 24.0.0
  183. */
  184. public static function getScripts(): array {
  185. // Sort scriptDeps into sortedScriptDeps
  186. $scriptSort = \OC::$server->get(AppScriptSort::class);
  187. $sortedScripts = $scriptSort->sort(self::$scripts, self::$scriptDeps);
  188. // Flatten array and remove duplicates
  189. $sortedScripts = $sortedScripts ? array_merge(...array_values(($sortedScripts))) : [];
  190. // Override core-common and core-main order
  191. array_unshift($sortedScripts, 'core/js/common', 'core/js/main');
  192. return array_unique($sortedScripts);
  193. }
  194. /**
  195. * Add a translation JS file
  196. * @param string $application application id
  197. * @param string $languageCode language code, defaults to the current locale
  198. * @since 8.0.0
  199. */
  200. public static function addTranslations($application, $languageCode = null) {
  201. if (is_null($languageCode)) {
  202. $languageCode = \OC::$server->getL10NFactory()->findLanguage($application);
  203. }
  204. if (!empty($application)) {
  205. $path = "$application/l10n/$languageCode";
  206. } else {
  207. $path = "l10n/$languageCode";
  208. }
  209. self::$scripts[$application][] = $path;
  210. }
  211. /**
  212. * Add a custom element to the header
  213. * If $text is null then the element will be written as empty element.
  214. * So use "" to get a closing tag.
  215. * @param string $tag tag name of the element
  216. * @param array $attributes array of attributes for the element
  217. * @param string $text the text content for the element
  218. * @since 4.0.0
  219. */
  220. public static function addHeader($tag, $attributes, $text = null) {
  221. \OC_Util::addHeader($tag, $attributes, $text);
  222. }
  223. /**
  224. * Creates an absolute url to the given app and file.
  225. * @param string $app app
  226. * @param string $file file
  227. * @param array $args array with param=>value, will be appended to the returned url
  228. * The value of $args will be urlencoded
  229. * @return string the url
  230. * @since 4.0.0 - parameter $args was added in 4.5.0
  231. */
  232. public static function linkToAbsolute($app, $file, $args = []) {
  233. $urlGenerator = \OC::$server->getURLGenerator();
  234. return $urlGenerator->getAbsoluteURL(
  235. $urlGenerator->linkTo($app, $file, $args)
  236. );
  237. }
  238. /**
  239. * Creates an absolute url for remote use.
  240. * @param string $service id
  241. * @return string the url
  242. * @since 4.0.0
  243. */
  244. public static function linkToRemote($service) {
  245. $urlGenerator = \OC::$server->getURLGenerator();
  246. $remoteBase = $urlGenerator->linkTo('', 'remote.php') . '/' . $service;
  247. return $urlGenerator->getAbsoluteURL(
  248. $remoteBase . (($service[strlen($service) - 1] != '/') ? '/' : '')
  249. );
  250. }
  251. /**
  252. * Creates an absolute url for public use
  253. * @param string $service id
  254. * @return string the url
  255. * @since 4.5.0
  256. * @deprecated 15.0.0 - use OCP\IURLGenerator
  257. */
  258. public static function linkToPublic($service) {
  259. $urlGenerator = \OC::$server->getURLGenerator();
  260. if ($service === 'files') {
  261. return $urlGenerator->getAbsoluteURL('/s');
  262. }
  263. return $urlGenerator->getAbsoluteURL($urlGenerator->linkTo('', 'public.php').'?service='.$service);
  264. }
  265. /**
  266. * Returns the server host name without an eventual port number
  267. * @return string the server hostname
  268. * @since 5.0.0
  269. */
  270. public static function getServerHostName() {
  271. $host_name = \OC::$server->getRequest()->getServerHost();
  272. // strip away port number (if existing)
  273. $colon_pos = strpos($host_name, ':');
  274. if ($colon_pos != false) {
  275. $host_name = substr($host_name, 0, $colon_pos);
  276. }
  277. return $host_name;
  278. }
  279. /**
  280. * Returns the default email address
  281. * @param string $user_part the user part of the address
  282. * @return string the default email address
  283. *
  284. * Assembles a default email address (using the server hostname
  285. * and the given user part, and returns it
  286. * Example: when given lostpassword-noreply as $user_part param,
  287. * and is currently accessed via http(s)://example.com/,
  288. * it would return 'lostpassword-noreply@example.com'
  289. *
  290. * If the configuration value 'mail_from_address' is set in
  291. * config.php, this value will override the $user_part that
  292. * is passed to this function
  293. * @since 5.0.0
  294. */
  295. public static function getDefaultEmailAddress(string $user_part): string {
  296. $config = \OC::$server->getConfig();
  297. $user_part = $config->getSystemValueString('mail_from_address', $user_part);
  298. $host_name = self::getServerHostName();
  299. $host_name = $config->getSystemValueString('mail_domain', $host_name);
  300. $defaultEmailAddress = $user_part.'@'.$host_name;
  301. $mailer = \OC::$server->getMailer();
  302. if ($mailer->validateMailAddress($defaultEmailAddress)) {
  303. return $defaultEmailAddress;
  304. }
  305. // in case we cannot build a valid email address from the hostname let's fallback to 'localhost.localdomain'
  306. return $user_part.'@localhost.localdomain';
  307. }
  308. /**
  309. * Make a human file size (2048 to 2 kB)
  310. * @param int $bytes file size in bytes
  311. * @return string a human readable file size
  312. * @since 4.0.0
  313. */
  314. public static function humanFileSize($bytes) {
  315. return \OC_Helper::humanFileSize($bytes);
  316. }
  317. /**
  318. * Make a computer file size (2 kB to 2048)
  319. * @param string $str file size in a fancy format
  320. * @return float|false a file size in bytes
  321. *
  322. * Inspired by: https://www.php.net/manual/en/function.filesize.php#92418
  323. * @since 4.0.0
  324. */
  325. public static function computerFileSize($str) {
  326. return \OC_Helper::computerFileSize($str);
  327. }
  328. /**
  329. * connects a function to a hook
  330. *
  331. * @param string $signalClass class name of emitter
  332. * @param string $signalName name of signal
  333. * @param string|object $slotClass class name of slot
  334. * @param string $slotName name of slot
  335. * @return bool
  336. *
  337. * This function makes it very easy to connect to use hooks.
  338. *
  339. * TODO: write example
  340. * @since 4.0.0
  341. * @deprecated 21.0.0 use \OCP\EventDispatcher\IEventDispatcher::addListener
  342. */
  343. public static function connectHook($signalClass, $signalName, $slotClass, $slotName) {
  344. return \OC_Hook::connect($signalClass, $signalName, $slotClass, $slotName);
  345. }
  346. /**
  347. * Emits a signal. To get data from the slot use references!
  348. * @param string $signalclass class name of emitter
  349. * @param string $signalname name of signal
  350. * @param array $params default: array() array with additional data
  351. * @return bool true if slots exists or false if not
  352. *
  353. * TODO: write example
  354. * @since 4.0.0
  355. * @deprecated 21.0.0 use \OCP\EventDispatcher\IEventDispatcher::dispatchTypedEvent
  356. */
  357. public static function emitHook($signalclass, $signalname, $params = []) {
  358. return \OC_Hook::emit($signalclass, $signalname, $params);
  359. }
  360. /**
  361. * Cached encrypted CSRF token. Some static unit-tests of ownCloud compare
  362. * multiple OC_Template elements which invoke `callRegister`. If the value
  363. * would not be cached these unit-tests would fail.
  364. * @var string
  365. */
  366. private static $token = '';
  367. /**
  368. * Register an get/post call. This is important to prevent CSRF attacks
  369. * @since 4.5.0
  370. */
  371. public static function callRegister() {
  372. if (self::$token === '') {
  373. self::$token = \OC::$server->getCsrfTokenManager()->getToken()->getEncryptedValue();
  374. }
  375. return self::$token;
  376. }
  377. /**
  378. * Used to sanitize HTML
  379. *
  380. * This function is used to sanitize HTML and should be applied on any
  381. * string or array of strings before displaying it on a web page.
  382. *
  383. * @param string|string[] $value
  384. * @return string|string[] an array of sanitized strings or a single sanitized string, depends on the input parameter.
  385. * @since 4.5.0
  386. */
  387. public static function sanitizeHTML($value) {
  388. return \OC_Util::sanitizeHTML($value);
  389. }
  390. /**
  391. * Public function to encode url parameters
  392. *
  393. * This function is used to encode path to file before output.
  394. * Encoding is done according to RFC 3986 with one exception:
  395. * Character '/' is preserved as is.
  396. *
  397. * @param string $component part of URI to encode
  398. * @return string
  399. * @since 6.0.0
  400. */
  401. public static function encodePath($component) {
  402. return \OC_Util::encodePath($component);
  403. }
  404. /**
  405. * Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.
  406. *
  407. * @param array $input The array to work on
  408. * @param int $case Either MB_CASE_UPPER or MB_CASE_LOWER (default)
  409. * @param string $encoding The encoding parameter is the character encoding. Defaults to UTF-8
  410. * @return array
  411. * @since 4.5.0
  412. */
  413. public static function mb_array_change_key_case($input, $case = MB_CASE_LOWER, $encoding = 'UTF-8') {
  414. return \OC_Helper::mb_array_change_key_case($input, $case, $encoding);
  415. }
  416. /**
  417. * performs a search in a nested array
  418. *
  419. * @param array $haystack the array to be searched
  420. * @param string $needle the search string
  421. * @param mixed $index optional, only search this key name
  422. * @return mixed the key of the matching field, otherwise false
  423. * @since 4.5.0
  424. * @deprecated 15.0.0
  425. */
  426. public static function recursiveArraySearch($haystack, $needle, $index = null) {
  427. return \OC_Helper::recursiveArraySearch($haystack, $needle, $index);
  428. }
  429. /**
  430. * calculates the maximum upload size respecting system settings, free space and user quota
  431. *
  432. * @param string $dir the current folder where the user currently operates
  433. * @param int $free the number of bytes free on the storage holding $dir, if not set this will be received from the storage directly
  434. * @return int number of bytes representing
  435. * @since 5.0.0
  436. */
  437. public static function maxUploadFilesize($dir, $free = null) {
  438. return \OC_Helper::maxUploadFilesize($dir, $free);
  439. }
  440. /**
  441. * Calculate free space left within user quota
  442. * @param string $dir the current folder where the user currently operates
  443. * @return int number of bytes representing
  444. * @since 7.0.0
  445. */
  446. public static function freeSpace($dir) {
  447. return \OC_Helper::freeSpace($dir);
  448. }
  449. /**
  450. * Calculate PHP upload limit
  451. *
  452. * @return int number of bytes representing
  453. * @since 7.0.0
  454. */
  455. public static function uploadLimit() {
  456. return \OC_Helper::uploadLimit();
  457. }
  458. /**
  459. * Returns whether the given file name is valid
  460. * @param string $file file name to check
  461. * @return bool true if the file name is valid, false otherwise
  462. * @deprecated 8.1.0 use \OC\Files\View::verifyPath()
  463. * @since 7.0.0
  464. * @suppress PhanDeprecatedFunction
  465. */
  466. public static function isValidFileName($file) {
  467. return \OC_Util::isValidFileName($file);
  468. }
  469. /**
  470. * Compare two strings to provide a natural sort
  471. * @param string $a first string to compare
  472. * @param string $b second string to compare
  473. * @return int -1 if $b comes before $a, 1 if $a comes before $b
  474. * or 0 if the strings are identical
  475. * @since 7.0.0
  476. */
  477. public static function naturalSortCompare($a, $b) {
  478. return \OC\NaturalSort::getInstance()->compare($a, $b);
  479. }
  480. /**
  481. * Check if a password is required for each public link
  482. *
  483. * @param bool $checkGroupMembership Check group membership exclusion
  484. * @return boolean
  485. * @since 7.0.0
  486. */
  487. public static function isPublicLinkPasswordRequired(bool $checkGroupMembership = true) {
  488. return \OC_Util::isPublicLinkPasswordRequired($checkGroupMembership);
  489. }
  490. /**
  491. * check if share API enforces a default expire date
  492. * @return boolean
  493. * @since 8.0.0
  494. */
  495. public static function isDefaultExpireDateEnforced() {
  496. return \OC_Util::isDefaultExpireDateEnforced();
  497. }
  498. protected static $needUpgradeCache = null;
  499. /**
  500. * Checks whether the current version needs upgrade.
  501. *
  502. * @return bool true if upgrade is needed, false otherwise
  503. * @since 7.0.0
  504. */
  505. public static function needUpgrade() {
  506. if (!isset(self::$needUpgradeCache)) {
  507. self::$needUpgradeCache = \OC_Util::needUpgrade(\OC::$server->getSystemConfig());
  508. }
  509. return self::$needUpgradeCache;
  510. }
  511. /**
  512. * Sometimes a string has to be shortened to fit within a certain maximum
  513. * data length in bytes. substr() you may break multibyte characters,
  514. * because it operates on single byte level. mb_substr() operates on
  515. * characters, so does not ensure that the shortend string satisfies the
  516. * max length in bytes.
  517. *
  518. * For example, json_encode is messing with multibyte characters a lot,
  519. * replacing them with something along "\u1234".
  520. *
  521. * This function shortens the string with by $accurancy (-5) from
  522. * $dataLength characters, until it fits within $dataLength bytes.
  523. *
  524. * @since 23.0.0
  525. */
  526. public static function shortenMultibyteString(string $subject, int $dataLength, int $accuracy = 5): string {
  527. $temp = mb_substr($subject, 0, $dataLength);
  528. // json encodes encapsulates the string in double quotes, they need to be substracted
  529. while ((strlen(json_encode($temp)) - 2) > $dataLength) {
  530. $temp = mb_substr($temp, 0, -$accuracy);
  531. }
  532. return $temp;
  533. }
  534. /**
  535. * Check if a function is enabled in the php configuration
  536. *
  537. * @since 25.0.0
  538. */
  539. public static function isFunctionEnabled(string $functionName): bool {
  540. if (!function_exists($functionName)) {
  541. return false;
  542. }
  543. $ini = \OCP\Server::get(IniGetWrapper::class);
  544. $disabled = explode(',', $ini->get('disable_functions') ?: '');
  545. $disabled = array_map('trim', $disabled);
  546. if (in_array($functionName, $disabled)) {
  547. return false;
  548. }
  549. $disabled = explode(',', $ini->get('suhosin.executor.func.blacklist') ?: '');
  550. $disabled = array_map('trim', $disabled);
  551. if (in_array($functionName, $disabled)) {
  552. return false;
  553. }
  554. return true;
  555. }
  556. }