nextcloud / server

settings/Controller/CheckSetupController.php

Indentation +625 added lines, -625 removed lines

@@ -65,292 +65,292 @@ 
  * @package OC\Settings\Controller
  */
 class CheckSetupController extends Controller {
-	/** @var IConfig */
-	private $config;
-	/** @var IClientService */
-	private $clientService;
-	/** @var IURLGenerator */
-	private $urlGenerator;
-	/** @var IL10N */
-	private $l10n;
-	/** @var Checker */
-	private $checker;
-	/** @var ILogger */
-	private $logger;
-	/** @var EventDispatcherInterface */
-	private $dispatcher;
-	/** @var IDBConnection|Connection */
-	private $db;
-	/** @var ILockingProvider */
-	private $lockingProvider;
-	/** @var IDateTimeFormatter */
-	private $dateTimeFormatter;
-	/** @var MemoryInfo */
-	private $memoryInfo;
-	/** @var ISecureRandom */
-	private $secureRandom;
-
-	public function __construct($AppName,
-								IRequest $request,
-								IConfig $config,
-								IClientService $clientService,
-								IURLGenerator $urlGenerator,
-								IL10N $l10n,
-								Checker $checker,
-								ILogger $logger,
-								EventDispatcherInterface $dispatcher,
-								IDBConnection $db,
-								ILockingProvider $lockingProvider,
-								IDateTimeFormatter $dateTimeFormatter,
-								MemoryInfo $memoryInfo,
-								ISecureRandom $secureRandom) {
-		parent::__construct($AppName, $request);
-		$this->config = $config;
-		$this->clientService = $clientService;
-		$this->urlGenerator = $urlGenerator;
-		$this->l10n = $l10n;
-		$this->checker = $checker;
-		$this->logger = $logger;
-		$this->dispatcher = $dispatcher;
-		$this->db = $db;
-		$this->lockingProvider = $lockingProvider;
-		$this->dateTimeFormatter = $dateTimeFormatter;
-		$this->memoryInfo = $memoryInfo;
-		$this->secureRandom = $secureRandom;
-	}
-
-	/**
-	 * Checks if the server can connect to the internet using HTTPS and HTTP
-	 * @return bool
-	 */
-	private function hasInternetConnectivityProblems(): bool {
-		if ($this->config->getSystemValue('has_internet_connection', true) === false) {
-			return false;
-		}
-
-		$siteArray = $this->config->getSystemValue('connectivity_check_domains', [
-			'www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'
-		]);
-
-		foreach($siteArray as $site) {
-			if ($this->isSiteReachable($site)) {
-				return false;
-			}
-		}
-		return true;
-	}
-
-	/**
-	* Checks if the Nextcloud server can connect to a specific URL using both HTTPS and HTTP
-	* @return bool
-	*/
-	private function isSiteReachable($sitename) {
-		$httpSiteName = 'http://' . $sitename . '/';
-		$httpsSiteName = 'https://' . $sitename . '/';
-
-		try {
-			$client = $this->clientService->newClient();
-			$client->get($httpSiteName);
-			$client->get($httpsSiteName);
-		} catch (\Exception $e) {
-			$this->logger->logException($e, ['app' => 'internet_connection_check']);
-			return false;
-		}
-		return true;
-	}
-
-	/**
-	 * Checks whether a local memcache is installed or not
-	 * @return bool
-	 */
-	private function isMemcacheConfigured() {
-		return $this->config->getSystemValue('memcache.local', null) !== null;
-	}
-
-	/**
-	 * Whether PHP can generate "secure" pseudorandom integers
-	 *
-	 * @return bool
-	 */
-	private function isRandomnessSecure() {
-		try {
-			$this->secureRandom->generate(1);
-		} catch (\Exception $ex) {
-			return false;
-		}
-		return true;
-	}
-
-	/**
-	 * Public for the sake of unit-testing
-	 *
-	 * @return array
-	 */
-	protected function getCurlVersion() {
-		return curl_version();
-	}
-
-	/**
-	 * Check if the used  SSL lib is outdated. Older OpenSSL and NSS versions do
-	 * have multiple bugs which likely lead to problems in combination with
-	 * functionality required by ownCloud such as SNI.
-	 *
-	 * @link https://github.com/owncloud/core/issues/17446#issuecomment-122877546
-	 * @link https://bugzilla.redhat.com/show_bug.cgi?id=1241172
-	 * @return string
-	 */
-	private function isUsedTlsLibOutdated() {
-		// Don't run check when:
-		// 1. Server has `has_internet_connection` set to false
-		// 2. AppStore AND S2S is disabled
-		if(!$this->config->getSystemValue('has_internet_connection', true)) {
-			return '';
-		}
-		if(!$this->config->getSystemValue('appstoreenabled', true)
-			&& $this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') === 'no'
-			&& $this->config->getAppValue('files_sharing', 'incoming_server2server_share_enabled', 'yes') === 'no') {
-			return '';
-		}
-
-		$versionString = $this->getCurlVersion();
-		if(isset($versionString['ssl_version'])) {
-			$versionString = $versionString['ssl_version'];
-		} else {
-			return '';
-		}
-
-		$features = (string)$this->l10n->t('installing and updating apps via the app store or Federated Cloud Sharing');
-		if(!$this->config->getSystemValue('appstoreenabled', true)) {
-			$features = (string)$this->l10n->t('Federated Cloud Sharing');
-		}
-
-		// Check if at least OpenSSL after 1.01d or 1.0.2b
-		if(strpos($versionString, 'OpenSSL/') === 0) {
-			$majorVersion = substr($versionString, 8, 5);
-			$patchRelease = substr($versionString, 13, 6);
-
-			if(($majorVersion === '1.0.1' && ord($patchRelease) < ord('d')) ||
-				($majorVersion === '1.0.2' && ord($patchRelease) < ord('b'))) {
-				return $this->l10n->t('cURL is using an outdated %1$s version (%2$s). Please update your operating system or features such as %3$s will not work reliably.', ['OpenSSL', $versionString, $features]);
-			}
-		}
-
-		// Check if NSS and perform heuristic check
-		if(strpos($versionString, 'NSS/') === 0) {
-			try {
-				$firstClient = $this->clientService->newClient();
-				$firstClient->get('https://nextcloud.com/');
-
-				$secondClient = $this->clientService->newClient();
-				$secondClient->get('https://nextcloud.com/');
-			} catch (ClientException $e) {
-				if($e->getResponse()->getStatusCode() === 400) {
-					return $this->l10n->t('cURL is using an outdated %1$s version (%2$s). Please update your operating system or features such as %3$s will not work reliably.', ['NSS', $versionString, $features]);
-				}
-			}
-		}
-
-		return '';
-	}
-
-	/**
-	 * Whether the version is outdated
-	 *
-	 * @return bool
-	 */
-	protected function isPhpOutdated() {
-		if (version_compare(PHP_VERSION, '7.1.0', '<')) {
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * Whether the php version is still supported (at time of release)
-	 * according to: https://secure.php.net/supported-versions.php
-	 *
-	 * @return array
-	 */
-	private function isPhpSupported() {
-		return ['eol' => $this->isPhpOutdated(), 'version' => PHP_VERSION];
-	}
-
-	/**
-	 * Check if the reverse proxy configuration is working as expected
-	 *
-	 * @return bool
-	 */
-	private function forwardedForHeadersWorking() {
-		$trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
-		$remoteAddress = $this->request->getHeader('REMOTE_ADDR');
-
-		if (empty($trustedProxies) && $this->request->getHeader('X-Forwarded-Host') !== '') {
-			return false;
-		}
-
-		if (\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies, true)) {
-			return $remoteAddress !== $this->request->getRemoteAddress();
-		}
-
-		// either not enabled or working correctly
-		return true;
-	}
-
-	/**
-	 * Checks if the correct memcache module for PHP is installed. Only
-	 * fails if memcached is configured and the working module is not installed.
-	 *
-	 * @return bool
-	 */
-	private function isCorrectMemcachedPHPModuleInstalled() {
-		if ($this->config->getSystemValue('memcache.distributed', null) !== '\OC\Memcache\Memcached') {
-			return true;
-		}
-
-		// there are two different memcached modules for PHP
-		// we only support memcached and not memcache
-		// https://code.google.com/p/memcached/wiki/PHPClientComparison
-		return !(!extension_loaded('memcached') && extension_loaded('memcache'));
-	}
-
-	/**
-	 * Checks if set_time_limit is not disabled.
-	 *
-	 * @return bool
-	 */
-	private function isSettimelimitAvailable() {
-		if (function_exists('set_time_limit')
-			&& strpos(@ini_get('disable_functions'), 'set_time_limit') === false) {
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * @return RedirectResponse
-	 */
-	public function rescanFailedIntegrityCheck() {
-		$this->checker->runInstanceVerification();
-		return new RedirectResponse(
-			$this->urlGenerator->linkToRoute('settings.AdminSettings.index')
-		);
-	}
-
-	/**
-	 * @NoCSRFRequired
-	 * @return DataResponse
-	 */
-	public function getFailedIntegrityCheckFiles() {
-		if(!$this->checker->isCodeCheckEnforced()) {
-			return new DataDisplayResponse('Integrity checker has been disabled. Integrity cannot be verified.');
-		}
-
-		$completeResults = $this->checker->getResults();
-
-		if(!empty($completeResults)) {
-			$formattedTextResponse = 'Technical information
+    /** @var IConfig */
+    private $config;
+    /** @var IClientService */
+    private $clientService;
+    /** @var IURLGenerator */
+    private $urlGenerator;
+    /** @var IL10N */
+    private $l10n;
+    /** @var Checker */
+    private $checker;
+    /** @var ILogger */
+    private $logger;
+    /** @var EventDispatcherInterface */
+    private $dispatcher;
+    /** @var IDBConnection|Connection */
+    private $db;
+    /** @var ILockingProvider */
+    private $lockingProvider;
+    /** @var IDateTimeFormatter */
+    private $dateTimeFormatter;
+    /** @var MemoryInfo */
+    private $memoryInfo;
+    /** @var ISecureRandom */
+    private $secureRandom;
+
+    public function __construct($AppName,
+                                IRequest $request,
+                                IConfig $config,
+                                IClientService $clientService,
+                                IURLGenerator $urlGenerator,
+                                IL10N $l10n,
+                                Checker $checker,
+                                ILogger $logger,
+                                EventDispatcherInterface $dispatcher,
+                                IDBConnection $db,
+                                ILockingProvider $lockingProvider,
+                                IDateTimeFormatter $dateTimeFormatter,
+                                MemoryInfo $memoryInfo,
+                                ISecureRandom $secureRandom) {
+        parent::__construct($AppName, $request);
+        $this->config = $config;
+        $this->clientService = $clientService;
+        $this->urlGenerator = $urlGenerator;
+        $this->l10n = $l10n;
+        $this->checker = $checker;
+        $this->logger = $logger;
+        $this->dispatcher = $dispatcher;
+        $this->db = $db;
+        $this->lockingProvider = $lockingProvider;
+        $this->dateTimeFormatter = $dateTimeFormatter;
+        $this->memoryInfo = $memoryInfo;
+        $this->secureRandom = $secureRandom;
+    }
+
+    /**
+     * Checks if the server can connect to the internet using HTTPS and HTTP
+     * @return bool
+     */
+    private function hasInternetConnectivityProblems(): bool {
+        if ($this->config->getSystemValue('has_internet_connection', true) === false) {
+            return false;
+        }
+
+        $siteArray = $this->config->getSystemValue('connectivity_check_domains', [
+            'www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'
+        ]);
+
+        foreach($siteArray as $site) {
+            if ($this->isSiteReachable($site)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Checks if the Nextcloud server can connect to a specific URL using both HTTPS and HTTP
+     * @return bool
+     */
+    private function isSiteReachable($sitename) {
+        $httpSiteName = 'http://' . $sitename . '/';
+        $httpsSiteName = 'https://' . $sitename . '/';
+
+        try {
+            $client = $this->clientService->newClient();
+            $client->get($httpSiteName);
+            $client->get($httpsSiteName);
+        } catch (\Exception $e) {
+            $this->logger->logException($e, ['app' => 'internet_connection_check']);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Checks whether a local memcache is installed or not
+     * @return bool
+     */
+    private function isMemcacheConfigured() {
+        return $this->config->getSystemValue('memcache.local', null) !== null;
+    }
+
+    /**
+     * Whether PHP can generate "secure" pseudorandom integers
+     *
+     * @return bool
+     */
+    private function isRandomnessSecure() {
+        try {
+            $this->secureRandom->generate(1);
+        } catch (\Exception $ex) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Public for the sake of unit-testing
+     *
+     * @return array
+     */
+    protected function getCurlVersion() {
+        return curl_version();
+    }
+
+    /**
+     * Check if the used  SSL lib is outdated. Older OpenSSL and NSS versions do
+     * have multiple bugs which likely lead to problems in combination with
+     * functionality required by ownCloud such as SNI.
+     *
+     * @link https://github.com/owncloud/core/issues/17446#issuecomment-122877546
+     * @link https://bugzilla.redhat.com/show_bug.cgi?id=1241172
+     * @return string
+     */
+    private function isUsedTlsLibOutdated() {
+        // Don't run check when:
+        // 1. Server has `has_internet_connection` set to false
+        // 2. AppStore AND S2S is disabled
+        if(!$this->config->getSystemValue('has_internet_connection', true)) {
+            return '';
+        }
+        if(!$this->config->getSystemValue('appstoreenabled', true)
+            && $this->config->getAppValue('files_sharing', 'outgoing_server2server_share_enabled', 'yes') === 'no'
+            && $this->config->getAppValue('files_sharing', 'incoming_server2server_share_enabled', 'yes') === 'no') {
+            return '';
+        }
+
+        $versionString = $this->getCurlVersion();
+        if(isset($versionString['ssl_version'])) {
+            $versionString = $versionString['ssl_version'];
+        } else {
+            return '';
+        }
+
+        $features = (string)$this->l10n->t('installing and updating apps via the app store or Federated Cloud Sharing');
+        if(!$this->config->getSystemValue('appstoreenabled', true)) {
+            $features = (string)$this->l10n->t('Federated Cloud Sharing');
+        }
+
+        // Check if at least OpenSSL after 1.01d or 1.0.2b
+        if(strpos($versionString, 'OpenSSL/') === 0) {
+            $majorVersion = substr($versionString, 8, 5);
+            $patchRelease = substr($versionString, 13, 6);
+
+            if(($majorVersion === '1.0.1' && ord($patchRelease) < ord('d')) ||
+                ($majorVersion === '1.0.2' && ord($patchRelease) < ord('b'))) {
+                return $this->l10n->t('cURL is using an outdated %1$s version (%2$s). Please update your operating system or features such as %3$s will not work reliably.', ['OpenSSL', $versionString, $features]);
+            }
+        }
+
+        // Check if NSS and perform heuristic check
+        if(strpos($versionString, 'NSS/') === 0) {
+            try {
+                $firstClient = $this->clientService->newClient();
+                $firstClient->get('https://nextcloud.com/');
+
+                $secondClient = $this->clientService->newClient();
+                $secondClient->get('https://nextcloud.com/');
+            } catch (ClientException $e) {
+                if($e->getResponse()->getStatusCode() === 400) {
+                    return $this->l10n->t('cURL is using an outdated %1$s version (%2$s). Please update your operating system or features such as %3$s will not work reliably.', ['NSS', $versionString, $features]);
+                }
+            }
+        }
+
+        return '';
+    }
+
+    /**
+     * Whether the version is outdated
+     *
+     * @return bool
+     */
+    protected function isPhpOutdated() {
+        if (version_compare(PHP_VERSION, '7.1.0', '<')) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Whether the php version is still supported (at time of release)
+     * according to: https://secure.php.net/supported-versions.php
+     *
+     * @return array
+     */
+    private function isPhpSupported() {
+        return ['eol' => $this->isPhpOutdated(), 'version' => PHP_VERSION];
+    }
+
+    /**
+     * Check if the reverse proxy configuration is working as expected
+     *
+     * @return bool
+     */
+    private function forwardedForHeadersWorking() {
+        $trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
+        $remoteAddress = $this->request->getHeader('REMOTE_ADDR');
+
+        if (empty($trustedProxies) && $this->request->getHeader('X-Forwarded-Host') !== '') {
+            return false;
+        }
+
+        if (\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies, true)) {
+            return $remoteAddress !== $this->request->getRemoteAddress();
+        }
+
+        // either not enabled or working correctly
+        return true;
+    }
+
+    /**
+     * Checks if the correct memcache module for PHP is installed. Only
+     * fails if memcached is configured and the working module is not installed.
+     *
+     * @return bool
+     */
+    private function isCorrectMemcachedPHPModuleInstalled() {
+        if ($this->config->getSystemValue('memcache.distributed', null) !== '\OC\Memcache\Memcached') {
+            return true;
+        }
+
+        // there are two different memcached modules for PHP
+        // we only support memcached and not memcache
+        // https://code.google.com/p/memcached/wiki/PHPClientComparison
+        return !(!extension_loaded('memcached') && extension_loaded('memcache'));
+    }
+
+    /**
+     * Checks if set_time_limit is not disabled.
+     *
+     * @return bool
+     */
+    private function isSettimelimitAvailable() {
+        if (function_exists('set_time_limit')
+            && strpos(@ini_get('disable_functions'), 'set_time_limit') === false) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return RedirectResponse
+     */
+    public function rescanFailedIntegrityCheck() {
+        $this->checker->runInstanceVerification();
+        return new RedirectResponse(
+            $this->urlGenerator->linkToRoute('settings.AdminSettings.index')
+        );
+    }
+
+    /**
+     * @NoCSRFRequired
+     * @return DataResponse
+     */
+    public function getFailedIntegrityCheckFiles() {
+        if(!$this->checker->isCodeCheckEnforced()) {
+            return new DataDisplayResponse('Integrity checker has been disabled. Integrity cannot be verified.');
+        }
+
+        $completeResults = $this->checker->getResults();
+
+        if(!empty($completeResults)) {
+            $formattedTextResponse = 'Technical information
 =====================
 The following list covers which files have failed the integrity check. Please read
 the previous linked documentation to learn more about the errors and how to fix
@@ -359,346 +359,346 @@ 
 Results
 =======
 ';
-			foreach($completeResults as $context => $contextResult) {
-				$formattedTextResponse .= "- $context\n";
-
-				foreach($contextResult as $category => $result) {
-					$formattedTextResponse .= "\t- $category\n";
-					if($category !== 'EXCEPTION') {
-						foreach ($result as $key => $results) {
-							$formattedTextResponse .= "\t\t- $key\n";
-						}
-					} else {
-						foreach ($result as $key => $results) {
-							$formattedTextResponse .= "\t\t- $results\n";
-						}
-					}
-
-				}
-			}
-
-			$formattedTextResponse .= '
+            foreach($completeResults as $context => $contextResult) {
+                $formattedTextResponse .= "- $context\n";
+
+                foreach($contextResult as $category => $result) {
+                    $formattedTextResponse .= "\t- $category\n";
+                    if($category !== 'EXCEPTION') {
+                        foreach ($result as $key => $results) {
+                            $formattedTextResponse .= "\t\t- $key\n";
+                        }
+                    } else {
+                        foreach ($result as $key => $results) {
+                            $formattedTextResponse .= "\t\t- $results\n";
+                        }
+                    }
+
+                }
+            }
+
+            $formattedTextResponse .= '
 Raw output
 ==========
 ';
-			$formattedTextResponse .= print_r($completeResults, true);
-		} else {
-			$formattedTextResponse = 'No errors have been found.';
-		}
-
-
-		$response = new DataDisplayResponse(
-			$formattedTextResponse,
-			Http::STATUS_OK,
-			[
-				'Content-Type' => 'text/plain',
-			]
-		);
-
-		return $response;
-	}
-
-	/**
-	 * Checks whether a PHP opcache is properly set up
-	 * @return bool
-	 */
-	protected function isOpcacheProperlySetup() {
-		$iniWrapper = new IniGetWrapper();
-
-		if(!$iniWrapper->getBool('opcache.enable')) {
-			return false;
-		}
-
-		if(!$iniWrapper->getBool('opcache.save_comments')) {
-			return false;
-		}
-
-		if($iniWrapper->getNumeric('opcache.max_accelerated_files') < 10000) {
-			return false;
-		}
-
-		if($iniWrapper->getNumeric('opcache.memory_consumption') < 128) {
-			return false;
-		}
-
-		if($iniWrapper->getNumeric('opcache.interned_strings_buffer') < 8) {
-			return false;
-		}
-
-		return true;
-	}
-
-	/**
-	 * Check if the required FreeType functions are present
-	 * @return bool
-	 */
-	protected function hasFreeTypeSupport() {
-		return function_exists('imagettfbbox') && function_exists('imagettftext');
-	}
-
-	protected function hasMissingIndexes(): array {
-		$indexInfo = new MissingIndexInformation();
-		// Dispatch event so apps can also hint for pending index updates if needed
-		$event = new GenericEvent($indexInfo);
-		$this->dispatcher->dispatch(IDBConnection::CHECK_MISSING_INDEXES_EVENT, $event);
-
-		return $indexInfo->getListOfMissingIndexes();
-	}
-
-	protected function isSqliteUsed() {
-		return strpos($this->config->getSystemValue('dbtype'), 'sqlite') !== false;
-	}
-
-	protected function isReadOnlyConfig(): bool {
-		return \OC_Helper::isReadOnlyConfigEnabled();
-	}
-
-	protected function hasValidTransactionIsolationLevel(): bool {
-		try {
-			if ($this->db->getDatabasePlatform() instanceof SqlitePlatform) {
-				return true;
-			}
-
-			return $this->db->getTransactionIsolation() === Connection::TRANSACTION_READ_COMMITTED;
-		} catch (DBALException $e) {
-			// ignore
-		}
-
-		return true;
-	}
-
-	protected function hasFileinfoInstalled(): bool {
-		return \OC_Util::fileInfoLoaded();
-	}
-
-	protected function hasWorkingFileLocking(): bool {
-		return !($this->lockingProvider instanceof NoopLockingProvider);
-	}
-
-	protected function getSuggestedOverwriteCliURL(): string {
-		$suggestedOverwriteCliUrl = '';
-		if ($this->config->getSystemValue('overwrite.cli.url', '') === '') {
-			$suggestedOverwriteCliUrl = $this->request->getServerProtocol() . '://' . $this->request->getInsecureServerHost() . \OC::$WEBROOT;
-			if (!$this->config->getSystemValue('config_is_read_only', false)) {
-				// Set the overwrite URL when it was not set yet.
-				$this->config->setSystemValue('overwrite.cli.url', $suggestedOverwriteCliUrl);
-				$suggestedOverwriteCliUrl = '';
-			}
-		}
-		return $suggestedOverwriteCliUrl;
-	}
-
-	protected function getLastCronInfo(): array {
-		$lastCronRun = $this->config->getAppValue('core', 'lastcron', 0);
-		return [
-			'diffInSeconds' => time() - $lastCronRun,
-			'relativeTime' => $this->dateTimeFormatter->formatTimeSpan($lastCronRun),
-			'backgroundJobsUrl' => $this->urlGenerator->linkToRoute('settings.AdminSettings.index', ['section' => 'server']) . '#backgroundjobs',
-		];
-	}
-
-	protected function getCronErrors() {
-		$errors = json_decode($this->config->getAppValue('core', 'cronErrors', ''), true);
-
-		if (is_array($errors)) {
-			return $errors;
-		}
-
-		return [];
-	}
-
-	protected function isPHPMailerUsed(): bool {
-		return $this->config->getSystemValue('mail_smtpmode', 'smtp') === 'php';
-	}
-
-	protected function hasOpcacheLoaded(): bool {
-		return function_exists('opcache_get_status');
-	}
-
-	/**
-	 * Iterates through the configured app roots and
-	 * tests if the subdirectories are owned by the same user than the current user.
-	 *
-	 * @return array
-	 */
-	protected function getAppDirsWithDifferentOwner(): array {
-		$currentUser = posix_getuid();
-		$appDirsWithDifferentOwner = [[]];
-
-		foreach (OC::$APPSROOTS as $appRoot) {
-			if ($appRoot['writable'] === true) {
-				$appDirsWithDifferentOwner[] = $this->getAppDirsWithDifferentOwnerForAppRoot($currentUser, $appRoot);
-			}
-		}
-
-		$appDirsWithDifferentOwner = array_merge(...$appDirsWithDifferentOwner);
-		sort($appDirsWithDifferentOwner);
-
-		return $appDirsWithDifferentOwner;
-	}
-
-	/**
-	 * Tests if the directories for one apps directory are writable by the current user.
-	 *
-	 * @param int $currentUser The current user
-	 * @param array $appRoot The app root config
-	 * @return string[] The none writable directory paths inside the app root
-	 */
-	private function getAppDirsWithDifferentOwnerForAppRoot(int $currentUser, array $appRoot): array {
-		$appDirsWithDifferentOwner = [];
-		$appsPath = $appRoot['path'];
-		$appsDir = new DirectoryIterator($appRoot['path']);
-
-		foreach ($appsDir as $fileInfo) {
-			if ($fileInfo->isDir() && !$fileInfo->isDot()) {
-				$absAppPath = $appsPath . DIRECTORY_SEPARATOR . $fileInfo->getFilename();
-				$appDirUser = fileowner($absAppPath);
-				if ($appDirUser !== $currentUser) {
-					$appDirsWithDifferentOwner[] = $absAppPath;
-				}
-			}
-		}
-
-		return $appDirsWithDifferentOwner;
-	}
-
-	/**
-	 * Checks for potential PHP modules that would improve the instance
-	 *
-	 * @return string[] A list of PHP modules that is recommended
-	 */
-	protected function hasRecommendedPHPModules(): array {
-		$recommendedPHPModules = [];
-
-		if (!extension_loaded('intl')) {
-			$recommendedPHPModules[] = 'intl';
-		}
-
-		if ($this->config->getAppValue('theming', 'enabled', 'no') === 'yes') {
-			if (!extension_loaded('imagick')) {
-				$recommendedPHPModules[] = 'imagick';
-			}
-		}
-
-		return $recommendedPHPModules;
-	}
-
-	protected function isMysqlUsedWithoutUTF8MB4(): bool {
-		return ($this->config->getSystemValue('dbtype', 'sqlite') === 'mysql') && ($this->config->getSystemValue('mysql.utf8mb4', false) === false);
-	}
-
-	protected function hasBigIntConversionPendingColumns(): array {
-		// copy of ConvertFilecacheBigInt::getColumnsByTable()
-		$tables = [
-			'activity' => ['activity_id', 'object_id'],
-			'activity_mq' => ['mail_id'],
-			'filecache' => ['fileid', 'storage', 'parent', 'mimetype', 'mimepart', 'mtime', 'storage_mtime'],
-			'mimetypes' => ['id'],
-			'storages' => ['numeric_id'],
-		];
-
-		$schema = new SchemaWrapper($this->db);
-		$isSqlite = $this->db->getDatabasePlatform() instanceof SqlitePlatform;
-		$pendingColumns = [];
-
-		foreach ($tables as $tableName => $columns) {
-			if (!$schema->hasTable($tableName)) {
-				continue;
-			}
-
-			$table = $schema->getTable($tableName);
-			foreach ($columns as $columnName) {
-				$column = $table->getColumn($columnName);
-				$isAutoIncrement = $column->getAutoincrement();
-				$isAutoIncrementOnSqlite = $isSqlite && $isAutoIncrement;
-				if ($column->getType()->getName() !== Type::BIGINT && !$isAutoIncrementOnSqlite) {
-					$pendingColumns[] = $tableName . '.' . $columnName;
-				}
-			}
-		}
-
-		return $pendingColumns;
-	}
-
-	protected function isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed(): bool {
-		$objectStore = $this->config->getSystemValue('objectstore', null);
-		$objectStoreMultibucket = $this->config->getSystemValue('objectstore_multibucket', null);
-
-		if (!isset($objectStoreMultibucket) && !isset($objectStore)) {
-			return true;
-		}
-
-		if (isset($objectStoreMultibucket['class']) && $objectStoreMultibucket['class'] !== 'OC\\Files\\ObjectStore\\S3') {
-			return true;
-		}
-
-		if (isset($objectStore['class']) && $objectStore['class'] !== 'OC\\Files\\ObjectStore\\S3') {
-			return true;
-		}
-
-		$tempPath = sys_get_temp_dir();
-		if (!is_dir($tempPath)) {
-			$this->logger->error('Error while checking the temporary PHP path - it was not properly set to a directory. value: ' . $tempPath);
-			return false;
-		}
-		$freeSpaceInTemp = disk_free_space($tempPath);
-		if ($freeSpaceInTemp === false) {
-			$this->logger->error('Error while checking the available disk space of temporary PHP path - no free disk space returned. temporary path: ' . $tempPath);
-			return false;
-		}
-
-		$freeSpaceInTempInGB = $freeSpaceInTemp / 1024 / 1024 / 1024;
-		if ($freeSpaceInTempInGB > 50) {
-			return true;
-		}
-
-		$this->logger->warning('Checking the available space in the temporary path resulted in ' . round($freeSpaceInTempInGB, 1) . ' GB instead of the recommended 50GB. Path: ' . $tempPath);
-		return false;
-	}
-
-	/**
-	 * @return DataResponse
-	 */
-	public function check() {
-		return new DataResponse(
-			[
-				'isGetenvServerWorking' => !empty(getenv('PATH')),
-				'isReadOnlyConfig' => $this->isReadOnlyConfig(),
-				'hasValidTransactionIsolationLevel' => $this->hasValidTransactionIsolationLevel(),
-				'hasFileinfoInstalled' => $this->hasFileinfoInstalled(),
-				'hasWorkingFileLocking' => $this->hasWorkingFileLocking(),
-				'suggestedOverwriteCliURL' => $this->getSuggestedOverwriteCliURL(),
-				'cronInfo' => $this->getLastCronInfo(),
-				'cronErrors' => $this->getCronErrors(),
-				'serverHasInternetConnectionProblems' => $this->hasInternetConnectivityProblems(),
-				'isMemcacheConfigured' => $this->isMemcacheConfigured(),
-				'memcacheDocs' => $this->urlGenerator->linkToDocs('admin-performance'),
-				'isRandomnessSecure' => $this->isRandomnessSecure(),
-				'securityDocs' => $this->urlGenerator->linkToDocs('admin-security'),
-				'isUsedTlsLibOutdated' => $this->isUsedTlsLibOutdated(),
-				'phpSupported' => $this->isPhpSupported(),
-				'forwardedForHeadersWorking' => $this->forwardedForHeadersWorking(),
-				'reverseProxyDocs' => $this->urlGenerator->linkToDocs('admin-reverse-proxy'),
-				'isCorrectMemcachedPHPModuleInstalled' => $this->isCorrectMemcachedPHPModuleInstalled(),
-				'hasPassedCodeIntegrityCheck' => $this->checker->hasPassedCheck(),
-				'codeIntegrityCheckerDocumentation' => $this->urlGenerator->linkToDocs('admin-code-integrity'),
-				'isOpcacheProperlySetup' => $this->isOpcacheProperlySetup(),
-				'hasOpcacheLoaded' => $this->hasOpcacheLoaded(),
-				'phpOpcacheDocumentation' => $this->urlGenerator->linkToDocs('admin-php-opcache'),
-				'isSettimelimitAvailable' => $this->isSettimelimitAvailable(),
-				'hasFreeTypeSupport' => $this->hasFreeTypeSupport(),
-				'missingIndexes' => $this->hasMissingIndexes(),
-				'isSqliteUsed' => $this->isSqliteUsed(),
-				'databaseConversionDocumentation' => $this->urlGenerator->linkToDocs('admin-db-conversion'),
-				'isPHPMailerUsed' => $this->isPHPMailerUsed(),
-				'mailSettingsDocumentation' => $this->urlGenerator->getAbsoluteURL('index.php/settings/admin'),
-				'isMemoryLimitSufficient' => $this->memoryInfo->isMemoryLimitSufficient(),
-				'appDirsWithDifferentOwner' => $this->getAppDirsWithDifferentOwner(),
-				'recommendedPHPModules' => $this->hasRecommendedPHPModules(),
-				'pendingBigIntConversionColumns' => $this->hasBigIntConversionPendingColumns(),
-				'isMysqlUsedWithoutUTF8MB4' => $this->isMysqlUsedWithoutUTF8MB4(),
-				'isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed' => $this->isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed(),
-			]
-		);
-	}
+            $formattedTextResponse .= print_r($completeResults, true);
+        } else {
+            $formattedTextResponse = 'No errors have been found.';
+        }
+
+
+        $response = new DataDisplayResponse(
+            $formattedTextResponse,
+            Http::STATUS_OK,
+            [
+                'Content-Type' => 'text/plain',
+            ]
+        );
+
+        return $response;
+    }
+
+    /**
+     * Checks whether a PHP opcache is properly set up
+     * @return bool
+     */
+    protected function isOpcacheProperlySetup() {
+        $iniWrapper = new IniGetWrapper();
+
+        if(!$iniWrapper->getBool('opcache.enable')) {
+            return false;
+        }
+
+        if(!$iniWrapper->getBool('opcache.save_comments')) {
+            return false;
+        }
+
+        if($iniWrapper->getNumeric('opcache.max_accelerated_files') < 10000) {
+            return false;
+        }
+
+        if($iniWrapper->getNumeric('opcache.memory_consumption') < 128) {
+            return false;
+        }
+
+        if($iniWrapper->getNumeric('opcache.interned_strings_buffer') < 8) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Check if the required FreeType functions are present
+     * @return bool
+     */
+    protected function hasFreeTypeSupport() {
+        return function_exists('imagettfbbox') && function_exists('imagettftext');
+    }
+
+    protected function hasMissingIndexes(): array {
+        $indexInfo = new MissingIndexInformation();
+        // Dispatch event so apps can also hint for pending index updates if needed
+        $event = new GenericEvent($indexInfo);
+        $this->dispatcher->dispatch(IDBConnection::CHECK_MISSING_INDEXES_EVENT, $event);
+
+        return $indexInfo->getListOfMissingIndexes();
+    }
+
+    protected function isSqliteUsed() {
+        return strpos($this->config->getSystemValue('dbtype'), 'sqlite') !== false;
+    }
+
+    protected function isReadOnlyConfig(): bool {
+        return \OC_Helper::isReadOnlyConfigEnabled();
+    }
+
+    protected function hasValidTransactionIsolationLevel(): bool {
+        try {
+            if ($this->db->getDatabasePlatform() instanceof SqlitePlatform) {
+                return true;
+            }
+
+            return $this->db->getTransactionIsolation() === Connection::TRANSACTION_READ_COMMITTED;
+        } catch (DBALException $e) {
+            // ignore
+        }
+
+        return true;
+    }
+
+    protected function hasFileinfoInstalled(): bool {
+        return \OC_Util::fileInfoLoaded();
+    }
+
+    protected function hasWorkingFileLocking(): bool {
+        return !($this->lockingProvider instanceof NoopLockingProvider);
+    }
+
+    protected function getSuggestedOverwriteCliURL(): string {
+        $suggestedOverwriteCliUrl = '';
+        if ($this->config->getSystemValue('overwrite.cli.url', '') === '') {
+            $suggestedOverwriteCliUrl = $this->request->getServerProtocol() . '://' . $this->request->getInsecureServerHost() . \OC::$WEBROOT;
+            if (!$this->config->getSystemValue('config_is_read_only', false)) {
+                // Set the overwrite URL when it was not set yet.
+                $this->config->setSystemValue('overwrite.cli.url', $suggestedOverwriteCliUrl);
+                $suggestedOverwriteCliUrl = '';
+            }
+        }
+        return $suggestedOverwriteCliUrl;
+    }
+
+    protected function getLastCronInfo(): array {
+        $lastCronRun = $this->config->getAppValue('core', 'lastcron', 0);
+        return [
+            'diffInSeconds' => time() - $lastCronRun,
+            'relativeTime' => $this->dateTimeFormatter->formatTimeSpan($lastCronRun),
+            'backgroundJobsUrl' => $this->urlGenerator->linkToRoute('settings.AdminSettings.index', ['section' => 'server']) . '#backgroundjobs',
+        ];
+    }
+
+    protected function getCronErrors() {
+        $errors = json_decode($this->config->getAppValue('core', 'cronErrors', ''), true);
+
+        if (is_array($errors)) {
+            return $errors;
+        }
+
+        return [];
+    }
+
+    protected function isPHPMailerUsed(): bool {
+        return $this->config->getSystemValue('mail_smtpmode', 'smtp') === 'php';
+    }
+
+    protected function hasOpcacheLoaded(): bool {
+        return function_exists('opcache_get_status');
+    }
+
+    /**
+     * Iterates through the configured app roots and
+     * tests if the subdirectories are owned by the same user than the current user.
+     *
+     * @return array
+     */
+    protected function getAppDirsWithDifferentOwner(): array {
+        $currentUser = posix_getuid();
+        $appDirsWithDifferentOwner = [[]];
+
+        foreach (OC::$APPSROOTS as $appRoot) {
+            if ($appRoot['writable'] === true) {
+                $appDirsWithDifferentOwner[] = $this->getAppDirsWithDifferentOwnerForAppRoot($currentUser, $appRoot);
+            }
+        }
+
+        $appDirsWithDifferentOwner = array_merge(...$appDirsWithDifferentOwner);
+        sort($appDirsWithDifferentOwner);
+
+        return $appDirsWithDifferentOwner;
+    }
+
+    /**
+     * Tests if the directories for one apps directory are writable by the current user.
+     *
+     * @param int $currentUser The current user
+     * @param array $appRoot The app root config
+     * @return string[] The none writable directory paths inside the app root
+     */
+    private function getAppDirsWithDifferentOwnerForAppRoot(int $currentUser, array $appRoot): array {
+        $appDirsWithDifferentOwner = [];
+        $appsPath = $appRoot['path'];
+        $appsDir = new DirectoryIterator($appRoot['path']);
+
+        foreach ($appsDir as $fileInfo) {
+            if ($fileInfo->isDir() && !$fileInfo->isDot()) {
+                $absAppPath = $appsPath . DIRECTORY_SEPARATOR . $fileInfo->getFilename();
+                $appDirUser = fileowner($absAppPath);
+                if ($appDirUser !== $currentUser) {
+                    $appDirsWithDifferentOwner[] = $absAppPath;
+                }
+            }
+        }
+
+        return $appDirsWithDifferentOwner;
+    }
+
+    /**
+     * Checks for potential PHP modules that would improve the instance
+     *
+     * @return string[] A list of PHP modules that is recommended
+     */
+    protected function hasRecommendedPHPModules(): array {
+        $recommendedPHPModules = [];
+
+        if (!extension_loaded('intl')) {
+            $recommendedPHPModules[] = 'intl';
+        }
+
+        if ($this->config->getAppValue('theming', 'enabled', 'no') === 'yes') {
+            if (!extension_loaded('imagick')) {
+                $recommendedPHPModules[] = 'imagick';
+            }
+        }
+
+        return $recommendedPHPModules;
+    }
+
+    protected function isMysqlUsedWithoutUTF8MB4(): bool {
+        return ($this->config->getSystemValue('dbtype', 'sqlite') === 'mysql') && ($this->config->getSystemValue('mysql.utf8mb4', false) === false);
+    }
+
+    protected function hasBigIntConversionPendingColumns(): array {
+        // copy of ConvertFilecacheBigInt::getColumnsByTable()
+        $tables = [
+            'activity' => ['activity_id', 'object_id'],
+            'activity_mq' => ['mail_id'],
+            'filecache' => ['fileid', 'storage', 'parent', 'mimetype', 'mimepart', 'mtime', 'storage_mtime'],
+            'mimetypes' => ['id'],
+            'storages' => ['numeric_id'],
+        ];
+
+        $schema = new SchemaWrapper($this->db);
+        $isSqlite = $this->db->getDatabasePlatform() instanceof SqlitePlatform;
+        $pendingColumns = [];
+
+        foreach ($tables as $tableName => $columns) {
+            if (!$schema->hasTable($tableName)) {
+                continue;
+            }
+
+            $table = $schema->getTable($tableName);
+            foreach ($columns as $columnName) {
+                $column = $table->getColumn($columnName);
+                $isAutoIncrement = $column->getAutoincrement();
+                $isAutoIncrementOnSqlite = $isSqlite && $isAutoIncrement;
+                if ($column->getType()->getName() !== Type::BIGINT && !$isAutoIncrementOnSqlite) {
+                    $pendingColumns[] = $tableName . '.' . $columnName;
+                }
+            }
+        }
+
+        return $pendingColumns;
+    }
+
+    protected function isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed(): bool {
+        $objectStore = $this->config->getSystemValue('objectstore', null);
+        $objectStoreMultibucket = $this->config->getSystemValue('objectstore_multibucket', null);
+
+        if (!isset($objectStoreMultibucket) && !isset($objectStore)) {
+            return true;
+        }
+
+        if (isset($objectStoreMultibucket['class']) && $objectStoreMultibucket['class'] !== 'OC\\Files\\ObjectStore\\S3') {
+            return true;
+        }
+
+        if (isset($objectStore['class']) && $objectStore['class'] !== 'OC\\Files\\ObjectStore\\S3') {
+            return true;
+        }
+
+        $tempPath = sys_get_temp_dir();
+        if (!is_dir($tempPath)) {
+            $this->logger->error('Error while checking the temporary PHP path - it was not properly set to a directory. value: ' . $tempPath);
+            return false;
+        }
+        $freeSpaceInTemp = disk_free_space($tempPath);
+        if ($freeSpaceInTemp === false) {
+            $this->logger->error('Error while checking the available disk space of temporary PHP path - no free disk space returned. temporary path: ' . $tempPath);
+            return false;
+        }
+
+        $freeSpaceInTempInGB = $freeSpaceInTemp / 1024 / 1024 / 1024;
+        if ($freeSpaceInTempInGB > 50) {
+            return true;
+        }
+
+        $this->logger->warning('Checking the available space in the temporary path resulted in ' . round($freeSpaceInTempInGB, 1) . ' GB instead of the recommended 50GB. Path: ' . $tempPath);
+        return false;
+    }
+
+    /**
+     * @return DataResponse
+     */
+    public function check() {
+        return new DataResponse(
+            [
+                'isGetenvServerWorking' => !empty(getenv('PATH')),
+                'isReadOnlyConfig' => $this->isReadOnlyConfig(),
+                'hasValidTransactionIsolationLevel' => $this->hasValidTransactionIsolationLevel(),
+                'hasFileinfoInstalled' => $this->hasFileinfoInstalled(),
+                'hasWorkingFileLocking' => $this->hasWorkingFileLocking(),
+                'suggestedOverwriteCliURL' => $this->getSuggestedOverwriteCliURL(),
+                'cronInfo' => $this->getLastCronInfo(),
+                'cronErrors' => $this->getCronErrors(),
+                'serverHasInternetConnectionProblems' => $this->hasInternetConnectivityProblems(),
+                'isMemcacheConfigured' => $this->isMemcacheConfigured(),
+                'memcacheDocs' => $this->urlGenerator->linkToDocs('admin-performance'),
+                'isRandomnessSecure' => $this->isRandomnessSecure(),
+                'securityDocs' => $this->urlGenerator->linkToDocs('admin-security'),
+                'isUsedTlsLibOutdated' => $this->isUsedTlsLibOutdated(),
+                'phpSupported' => $this->isPhpSupported(),
+                'forwardedForHeadersWorking' => $this->forwardedForHeadersWorking(),
+                'reverseProxyDocs' => $this->urlGenerator->linkToDocs('admin-reverse-proxy'),
+                'isCorrectMemcachedPHPModuleInstalled' => $this->isCorrectMemcachedPHPModuleInstalled(),
+                'hasPassedCodeIntegrityCheck' => $this->checker->hasPassedCheck(),
+                'codeIntegrityCheckerDocumentation' => $this->urlGenerator->linkToDocs('admin-code-integrity'),
+                'isOpcacheProperlySetup' => $this->isOpcacheProperlySetup(),
+                'hasOpcacheLoaded' => $this->hasOpcacheLoaded(),
+                'phpOpcacheDocumentation' => $this->urlGenerator->linkToDocs('admin-php-opcache'),
+                'isSettimelimitAvailable' => $this->isSettimelimitAvailable(),
+                'hasFreeTypeSupport' => $this->hasFreeTypeSupport(),
+                'missingIndexes' => $this->hasMissingIndexes(),
+                'isSqliteUsed' => $this->isSqliteUsed(),
+                'databaseConversionDocumentation' => $this->urlGenerator->linkToDocs('admin-db-conversion'),
+                'isPHPMailerUsed' => $this->isPHPMailerUsed(),
+                'mailSettingsDocumentation' => $this->urlGenerator->getAbsoluteURL('index.php/settings/admin'),
+                'isMemoryLimitSufficient' => $this->memoryInfo->isMemoryLimitSufficient(),
+                'appDirsWithDifferentOwner' => $this->getAppDirsWithDifferentOwner(),
+                'recommendedPHPModules' => $this->hasRecommendedPHPModules(),
+                'pendingBigIntConversionColumns' => $this->hasBigIntConversionPendingColumns(),
+                'isMysqlUsedWithoutUTF8MB4' => $this->isMysqlUsedWithoutUTF8MB4(),
+                'isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed' => $this->isEnoughTempSpaceAvailableIfS3PrimaryStorageIsUsed(),
+            ]
+        );
+    }
 }