nextcloud / server

lib/private/AppFramework/Http/Request.php

Indentation +826 added lines, -826 removed lines

@@ -59,831 +59,831 @@
  */
 class Request implements \ArrayAccess, \Countable, IRequest {
 
-	const USER_AGENT_IE = '/(MSIE)|(Trident)/';
-	// Microsoft Edge User Agent from https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
-	const USER_AGENT_MS_EDGE = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+ Edge\/[0-9.]+$/';
-	// Firefox User Agent from https://developer.mozilla.org/en-US/docs/Web/HTTP/Gecko_user_agent_string_reference
-	const USER_AGENT_FIREFOX = '/^Mozilla\/5\.0 \([^)]+\) Gecko\/[0-9.]+ Firefox\/[0-9.]+$/';
-	// Chrome User Agent from https://developer.chrome.com/multidevice/user-agent
-	const USER_AGENT_CHROME = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\)( Ubuntu Chromium\/[0-9.]+|) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+$/';
-	// Safari User Agent from http://www.useragentstring.com/pages/Safari/
-	const USER_AGENT_SAFARI = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Version\/[0-9.]+ Safari\/[0-9.A-Z]+$/';
-	// Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
-	const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
-	const USER_AGENT_FREEBOX = '#^Mozilla/5\.0$#';
-	const REGEX_LOCALHOST = '/^(127\.0\.0\.1|localhost|::1)$/';
-
-	/**
-	 * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_IOS instead
-	 */
-	const USER_AGENT_OWNCLOUD_IOS = '/^Mozilla\/5\.0 \(iOS\) (ownCloud|Nextcloud)\-iOS.*$/';
-	/**
-	 * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_ANDROID instead
-	 */
-	const USER_AGENT_OWNCLOUD_ANDROID = '/^Mozilla\/5\.0 \(Android\) ownCloud\-android.*$/';
-	/**
-	 * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_DESKTOP instead
-	 */
-	const USER_AGENT_OWNCLOUD_DESKTOP = '/^Mozilla\/5\.0 \([A-Za-z ]+\) (mirall|csyncoC)\/.*$/';
-
-	protected $inputStream;
-	protected $content;
-	protected $items = [];
-	protected $allowedKeys = [
-		'get',
-		'post',
-		'files',
-		'server',
-		'env',
-		'cookies',
-		'urlParams',
-		'parameters',
-		'method',
-		'requesttoken',
-	];
-	/** @var ISecureRandom */
-	protected $secureRandom;
-	/** @var IConfig */
-	protected $config;
-	/** @var string */
-	protected $requestId = '';
-	/** @var ICrypto */
-	protected $crypto;
-	/** @var CsrfTokenManager|null */
-	protected $csrfTokenManager;
-
-	/** @var bool */
-	protected $contentDecoded = false;
-
-	/**
-	 * @param array $vars An associative array with the following optional values:
-	 *        - array 'urlParams' the parameters which were matched from the URL
-	 *        - array 'get' the $_GET array
-	 *        - array|string 'post' the $_POST array or JSON string
-	 *        - array 'files' the $_FILES array
-	 *        - array 'server' the $_SERVER array
-	 *        - array 'env' the $_ENV array
-	 *        - array 'cookies' the $_COOKIE array
-	 *        - string 'method' the request method (GET, POST etc)
-	 *        - string|false 'requesttoken' the requesttoken or false when not available
-	 * @param ISecureRandom $secureRandom
-	 * @param IConfig $config
-	 * @param CsrfTokenManager|null $csrfTokenManager
-	 * @param string $stream
-	 * @see http://www.php.net/manual/en/reserved.variables.php
-	 */
-	public function __construct(array $vars= [],
-								ISecureRandom $secureRandom = null,
-								IConfig $config,
-								CsrfTokenManager $csrfTokenManager = null,
-								string $stream = 'php://input') {
-		$this->inputStream = $stream;
-		$this->items['params'] = [];
-		$this->secureRandom = $secureRandom;
-		$this->config = $config;
-		$this->csrfTokenManager = $csrfTokenManager;
-
-		if(!array_key_exists('method', $vars)) {
-			$vars['method'] = 'GET';
-		}
-
-		foreach($this->allowedKeys as $name) {
-			$this->items[$name] = isset($vars[$name])
-				? $vars[$name]
-				: [];
-		}
-
-		$this->items['parameters'] = array_merge(
-			$this->items['get'],
-			$this->items['post'],
-			$this->items['urlParams'],
-			$this->items['params']
-		);
-
-	}
-	/**
-	 * @param array $parameters
-	 */
-	public function setUrlParameters(array $parameters) {
-		$this->items['urlParams'] = $parameters;
-		$this->items['parameters'] = array_merge(
-			$this->items['parameters'],
-			$this->items['urlParams']
-		);
-	}
-
-	/**
-	 * Countable method
-	 * @return int
-	 */
-	public function count(): int {
-		return \count($this->items['parameters']);
-	}
-
-	/**
-	* ArrayAccess methods
-	*
-	* Gives access to the combined GET, POST and urlParams arrays
-	*
-	* Examples:
-	*
-	* $var = $request['myvar'];
-	*
-	* or
-	*
-	* if(!isset($request['myvar']) {
-	* 	// Do something
-	* }
-	*
-	* $request['myvar'] = 'something'; // This throws an exception.
-	*
-	* @param string $offset The key to lookup
-	* @return boolean
-	*/
-	public function offsetExists($offset): bool {
-		return isset($this->items['parameters'][$offset]);
-	}
-
-	/**
-	 * @see offsetExists
-	 * @param string $offset
-	 * @return mixed
-	 */
-	public function offsetGet($offset) {
-		return isset($this->items['parameters'][$offset])
-			? $this->items['parameters'][$offset]
-			: null;
-	}
-
-	/**
-	 * @see offsetExists
-	 * @param string $offset
-	 * @param mixed $value
-	 */
-	public function offsetSet($offset, $value) {
-		throw new \RuntimeException('You cannot change the contents of the request object');
-	}
-
-	/**
-	 * @see offsetExists
-	 * @param string $offset
-	 */
-	public function offsetUnset($offset) {
-		throw new \RuntimeException('You cannot change the contents of the request object');
-	}
-
-	/**
-	 * Magic property accessors
-	 * @param string $name
-	 * @param mixed $value
-	 */
-	public function __set($name, $value) {
-		throw new \RuntimeException('You cannot change the contents of the request object');
-	}
-
-	/**
-	* Access request variables by method and name.
-	* Examples:
-	*
-	* $request->post['myvar']; // Only look for POST variables
-	* $request->myvar; or $request->{'myvar'}; or $request->{$myvar}
-	* Looks in the combined GET, POST and urlParams array.
-	*
-	* If you access e.g. ->post but the current HTTP request method
-	* is GET a \LogicException will be thrown.
-	*
-	* @param string $name The key to look for.
-	* @throws \LogicException
-	* @return mixed|null
-	*/
-	public function __get($name) {
-		switch($name) {
-			case 'put':
-			case 'patch':
-			case 'get':
-			case 'post':
-				if($this->method !== strtoupper($name)) {
-					throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
-				}
-				return $this->getContent();
-			case 'files':
-			case 'server':
-			case 'env':
-			case 'cookies':
-			case 'urlParams':
-			case 'method':
-				return isset($this->items[$name])
-					? $this->items[$name]
-					: null;
-			case 'parameters':
-			case 'params':
-				return $this->getContent();
-			default;
-				return isset($this[$name])
-					? $this[$name]
-					: null;
-		}
-	}
-
-	/**
-	 * @param string $name
-	 * @return bool
-	 */
-	public function __isset($name) {
-		if (\in_array($name, $this->allowedKeys, true)) {
-			return true;
-		}
-		return isset($this->items['parameters'][$name]);
-	}
-
-	/**
-	 * @param string $id
-	 */
-	public function __unset($id) {
-		throw new \RuntimeException('You cannot change the contents of the request object');
-	}
-
-	/**
-	 * Returns the value for a specific http header.
-	 *
-	 * This method returns null if the header did not exist.
-	 *
-	 * @param string $name
-	 * @return string
-	 */
-	public function getHeader(string $name): string {
-
-		$name = strtoupper(str_replace('-', '_',$name));
-		if (isset($this->server['HTTP_' . $name])) {
-			return $this->server['HTTP_' . $name];
-		}
-
-		// There's a few headers that seem to end up in the top-level
-		// server array.
-		switch ($name) {
-			case 'CONTENT_TYPE' :
-			case 'CONTENT_LENGTH' :
-				if (isset($this->server[$name])) {
-					return $this->server[$name];
-				}
-				break;
-			case 'REMOTE_ADDR' :
-				if (isset($this->server[$name])) {
-					return $this->server[$name];
-				}
-				break;
-		}
-
-		return '';
-	}
-
-	/**
-	 * Lets you access post and get parameters by the index
-	 * In case of json requests the encoded json body is accessed
-	 *
-	 * @param string $key the key which you want to access in the URL Parameter
-	 *                     placeholder, $_POST or $_GET array.
-	 *                     The priority how they're returned is the following:
-	 *                     1. URL parameters
-	 *                     2. POST parameters
-	 *                     3. GET parameters
-	 * @param mixed $default If the key is not found, this value will be returned
-	 * @return mixed the content of the array
-	 */
-	public function getParam(string $key, $default = null) {
-		return isset($this->parameters[$key])
-			? $this->parameters[$key]
-			: $default;
-	}
-
-	/**
-	 * Returns all params that were received, be it from the request
-	 * (as GET or POST) or throuh the URL by the route
-	 * @return array the array with all parameters
-	 */
-	public function getParams(): array {
-		return is_array($this->parameters) ? $this->parameters : [];
-	}
-
-	/**
-	 * Returns the method of the request
-	 * @return string the method of the request (POST, GET, etc)
-	 */
-	public function getMethod(): string {
-		return $this->method;
-	}
-
-	/**
-	 * Shortcut for accessing an uploaded file through the $_FILES array
-	 * @param string $key the key that will be taken from the $_FILES array
-	 * @return array the file in the $_FILES element
-	 */
-	public function getUploadedFile(string $key) {
-		return isset($this->files[$key]) ? $this->files[$key] : null;
-	}
-
-	/**
-	 * Shortcut for getting env variables
-	 * @param string $key the key that will be taken from the $_ENV array
-	 * @return array the value in the $_ENV element
-	 */
-	public function getEnv(string $key) {
-		return isset($this->env[$key]) ? $this->env[$key] : null;
-	}
-
-	/**
-	 * Shortcut for getting cookie variables
-	 * @param string $key the key that will be taken from the $_COOKIE array
-	 * @return string the value in the $_COOKIE element
-	 */
-	public function getCookie(string $key) {
-		return isset($this->cookies[$key]) ? $this->cookies[$key] : null;
-	}
-
-	/**
-	 * Returns the request body content.
-	 *
-	 * If the HTTP request method is PUT and the body
-	 * not application/x-www-form-urlencoded or application/json a stream
-	 * resource is returned, otherwise an array.
-	 *
-	 * @return array|string|resource The request body content or a resource to read the body stream.
-	 *
-	 * @throws \LogicException
-	 */
-	protected function getContent() {
-		// If the content can't be parsed into an array then return a stream resource.
-		if ($this->method === 'PUT'
-			&& $this->getHeader('Content-Length') !== '0'
-			&& $this->getHeader('Content-Length') !== ''
-			&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') === false
-			&& strpos($this->getHeader('Content-Type'), 'application/json') === false
-		) {
-			if ($this->content === false) {
-				throw new \LogicException(
-					'"put" can only be accessed once if not '
-					. 'application/x-www-form-urlencoded or application/json.'
-				);
-			}
-			$this->content = false;
-			return fopen($this->inputStream, 'rb');
-		} else {
-			$this->decodeContent();
-			return $this->items['parameters'];
-		}
-	}
-
-	/**
-	 * Attempt to decode the content and populate parameters
-	 */
-	protected function decodeContent() {
-		if ($this->contentDecoded) {
-			return;
-		}
-		$params = [];
-
-		// 'application/json' must be decoded manually.
-		if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
-			$params = json_decode(file_get_contents($this->inputStream), true);
-			if($params !== null && \count($params) > 0) {
-				$this->items['params'] = $params;
-				if($this->method === 'POST') {
-					$this->items['post'] = $params;
-				}
-			}
-
-		// Handle application/x-www-form-urlencoded for methods other than GET
-		// or post correctly
-		} elseif($this->method !== 'GET'
-				&& $this->method !== 'POST'
-				&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
-
-			parse_str(file_get_contents($this->inputStream), $params);
-			if(\is_array($params)) {
-				$this->items['params'] = $params;
-			}
-		}
-
-		if (\is_array($params)) {
-			$this->items['parameters'] = array_merge($this->items['parameters'], $params);
-		}
-		$this->contentDecoded = true;
-	}
-
-
-	/**
-	 * Checks if the CSRF check was correct
-	 * @return bool true if CSRF check passed
-	 */
-	public function passesCSRFCheck(): bool {
-		if($this->csrfTokenManager === null) {
-			return false;
-		}
-
-		if(!$this->passesStrictCookieCheck()) {
-			return false;
-		}
-
-		if (isset($this->items['get']['requesttoken'])) {
-			$token = $this->items['get']['requesttoken'];
-		} elseif (isset($this->items['post']['requesttoken'])) {
-			$token = $this->items['post']['requesttoken'];
-		} elseif (isset($this->items['server']['HTTP_REQUESTTOKEN'])) {
-			$token = $this->items['server']['HTTP_REQUESTTOKEN'];
-		} else {
-			//no token found.
-			return false;
-		}
-		$token = new CsrfToken($token);
-
-		return $this->csrfTokenManager->isTokenValid($token);
-	}
-
-	/**
-	 * Whether the cookie checks are required
-	 *
-	 * @return bool
-	 */
-	private function cookieCheckRequired(): bool {
-		if ($this->getHeader('OCS-APIREQUEST')) {
-			return false;
-		}
-		if($this->getCookie(session_name()) === null && $this->getCookie('nc_token') === null) {
-			return false;
-		}
-
-		return true;
-	}
-
-	/**
-	 * Wrapper around session_get_cookie_params
-	 *
-	 * @return array
-	 */
-	public function getCookieParams(): array {
-		return session_get_cookie_params();
-	}
-
-	/**
-	 * Appends the __Host- prefix to the cookie if applicable
-	 *
-	 * @param string $name
-	 * @return string
-	 */
-	protected function getProtectedCookieName(string $name): string {
-		$cookieParams = $this->getCookieParams();
-		$prefix = '';
-		if($cookieParams['secure'] === true && $cookieParams['path'] === '/') {
-			$prefix = '__Host-';
-		}
-
-		return $prefix.$name;
-	}
-
-	/**
-	 * Checks if the strict cookie has been sent with the request if the request
-	 * is including any cookies.
-	 *
-	 * @return bool
-	 * @since 9.1.0
-	 */
-	public function passesStrictCookieCheck(): bool {
-		if(!$this->cookieCheckRequired()) {
-			return true;
-		}
-
-		$cookieName = $this->getProtectedCookieName('nc_sameSiteCookiestrict');
-		if($this->getCookie($cookieName) === 'true'
-			&& $this->passesLaxCookieCheck()) {
-			return true;
-		}
-		return false;
-	}
-
-	/**
-	 * Checks if the lax cookie has been sent with the request if the request
-	 * is including any cookies.
-	 *
-	 * @return bool
-	 * @since 9.1.0
-	 */
-	public function passesLaxCookieCheck(): bool {
-		if(!$this->cookieCheckRequired()) {
-			return true;
-		}
-
-		$cookieName = $this->getProtectedCookieName('nc_sameSiteCookielax');
-		if($this->getCookie($cookieName) === 'true') {
-			return true;
-		}
-		return false;
-	}
-
-
-	/**
-	 * Returns an ID for the request, value is not guaranteed to be unique and is mostly meant for logging
-	 * If `mod_unique_id` is installed this value will be taken.
-	 * @return string
-	 */
-	public function getId(): string {
-		if(isset($this->server['UNIQUE_ID'])) {
-			return $this->server['UNIQUE_ID'];
-		}
-
-		if(empty($this->requestId)) {
-			$validChars = ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS;
-			$this->requestId = $this->secureRandom->generate(20, $validChars);
-		}
-
-		return $this->requestId;
-	}
-
-	/**
-	 * Returns the remote address, if the connection came from a trusted proxy
-	 * and `forwarded_for_headers` has been configured then the IP address
-	 * specified in this header will be returned instead.
-	 * Do always use this instead of $_SERVER['REMOTE_ADDR']
-	 * @return string IP address
-	 */
-	public function getRemoteAddress(): string {
-		$remoteAddress = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
-		$trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
-
-		if(\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
-			$forwardedForHeaders = $this->config->getSystemValue('forwarded_for_headers', [
-				'HTTP_X_FORWARDED_FOR'
-				// only have one default, so we cannot ship an insecure product out of the box
-			]);
-
-			foreach($forwardedForHeaders as $header) {
-				if(isset($this->server[$header])) {
-					foreach(explode(',', $this->server[$header]) as $IP) {
-						$IP = trim($IP);
-						if (filter_var($IP, FILTER_VALIDATE_IP) !== false) {
-							return $IP;
-						}
-					}
-				}
-			}
-		}
-
-		return $remoteAddress;
-	}
-
-	/**
-	 * Check overwrite condition
-	 * @param string $type
-	 * @return bool
-	 */
-	private function isOverwriteCondition(string $type = ''): bool {
-		$regex = '/' . $this->config->getSystemValue('overwritecondaddr', '')  . '/';
-		$remoteAddr = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
-		return $regex === '//' || preg_match($regex, $remoteAddr) === 1
-		|| $type !== 'protocol';
-	}
-
-	/**
-	 * Returns the server protocol. It respects one or more reverse proxies servers
-	 * and load balancers
-	 * @return string Server protocol (http or https)
-	 */
-	public function getServerProtocol(): string {
-		if($this->config->getSystemValue('overwriteprotocol') !== ''
-			&& $this->isOverwriteCondition('protocol')) {
-			return $this->config->getSystemValue('overwriteprotocol');
-		}
-
-		if (isset($this->server['HTTP_X_FORWARDED_PROTO'])) {
-			if (strpos($this->server['HTTP_X_FORWARDED_PROTO'], ',') !== false) {
-				$parts = explode(',', $this->server['HTTP_X_FORWARDED_PROTO']);
-				$proto = strtolower(trim($parts[0]));
-			} else {
-				$proto = strtolower($this->server['HTTP_X_FORWARDED_PROTO']);
-			}
-
-			// Verify that the protocol is always HTTP or HTTPS
-			// default to http if an invalid value is provided
-			return $proto === 'https' ? 'https' : 'http';
-		}
-
-		if (isset($this->server['HTTPS'])
-			&& $this->server['HTTPS'] !== null
-			&& $this->server['HTTPS'] !== 'off'
-			&& $this->server['HTTPS'] !== '') {
-			return 'https';
-		}
-
-		return 'http';
-	}
-
-	/**
-	 * Returns the used HTTP protocol.
-	 *
-	 * @return string HTTP protocol. HTTP/2, HTTP/1.1 or HTTP/1.0.
-	 */
-	public function getHttpProtocol(): string {
-		$claimedProtocol = $this->server['SERVER_PROTOCOL'];
-
-		if (\is_string($claimedProtocol)) {
-			$claimedProtocol = strtoupper($claimedProtocol);
-		}
-
-		$validProtocols = [
-			'HTTP/1.0',
-			'HTTP/1.1',
-			'HTTP/2',
-		];
-
-		if(\in_array($claimedProtocol, $validProtocols, true)) {
-			return $claimedProtocol;
-		}
-
-		return 'HTTP/1.1';
-	}
-
-	/**
-	 * Returns the request uri, even if the website uses one or more
-	 * reverse proxies
-	 * @return string
-	 */
-	public function getRequestUri(): string {
-		$uri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
-		if($this->config->getSystemValue('overwritewebroot') !== '' && $this->isOverwriteCondition()) {
-			$uri = $this->getScriptName() . substr($uri, \strlen($this->server['SCRIPT_NAME']));
-		}
-		return $uri;
-	}
-
-	/**
-	 * Get raw PathInfo from request (not urldecoded)
-	 * @throws \Exception
-	 * @return string Path info
-	 */
-	public function getRawPathInfo(): string {
-		$requestUri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
-		// remove too many leading slashes - can be caused by reverse proxy configuration
-		if (strpos($requestUri, '/') === 0) {
-			$requestUri = '/' . ltrim($requestUri, '/');
-		}
-
-		$requestUri = preg_replace('%/{2,}%', '/', $requestUri);
-
-		// Remove the query string from REQUEST_URI
-		if ($pos = strpos($requestUri, '?')) {
-			$requestUri = substr($requestUri, 0, $pos);
-		}
-
-		$scriptName = $this->server['SCRIPT_NAME'];
-		$pathInfo = $requestUri;
-
-		// strip off the script name's dir and file name
-		// FIXME: Sabre does not really belong here
-		list($path, $name) = \Sabre\Uri\split($scriptName);
-		if (!empty($path)) {
-			if($path === $pathInfo || strpos($pathInfo, $path.'/') === 0) {
-				$pathInfo = substr($pathInfo, \strlen($path));
-			} else {
-				throw new \Exception("The requested uri($requestUri) cannot be processed by the script '$scriptName')");
-			}
-		}
-		if ($name === null) {
-			$name = '';
-		}
-
-		if (strpos($pathInfo, '/'.$name) === 0) {
-			$pathInfo = substr($pathInfo, \strlen($name) + 1);
-		}
-		if ($name !== '' && strpos($pathInfo, $name) === 0) {
-			$pathInfo = substr($pathInfo, \strlen($name));
-		}
-		if($pathInfo === false || $pathInfo === '/'){
-			return '';
-		} else {
-			return $pathInfo;
-		}
-	}
-
-	/**
-	 * Get PathInfo from request
-	 * @throws \Exception
-	 * @return string|false Path info or false when not found
-	 */
-	public function getPathInfo() {
-		$pathInfo = $this->getRawPathInfo();
-		// following is taken from \Sabre\HTTP\URLUtil::decodePathSegment
-		$pathInfo = rawurldecode($pathInfo);
-		$encoding = mb_detect_encoding($pathInfo, ['UTF-8', 'ISO-8859-1']);
-
-		switch($encoding) {
-			case 'ISO-8859-1' :
-				$pathInfo = utf8_encode($pathInfo);
-		}
-		// end copy
-
-		return $pathInfo;
-	}
-
-	/**
-	 * Returns the script name, even if the website uses one or more
-	 * reverse proxies
-	 * @return string the script name
-	 */
-	public function getScriptName(): string {
-		$name = $this->server['SCRIPT_NAME'];
-		$overwriteWebRoot =  $this->config->getSystemValue('overwritewebroot');
-		if ($overwriteWebRoot !== '' && $this->isOverwriteCondition()) {
-			// FIXME: This code is untestable due to __DIR__, also that hardcoded path is really dangerous
-			$serverRoot = str_replace('\\', '/', substr(__DIR__, 0, -\strlen('lib/private/appframework/http/')));
-			$suburi = str_replace('\\', '/', substr(realpath($this->server['SCRIPT_FILENAME']), \strlen($serverRoot)));
-			$name = '/' . ltrim($overwriteWebRoot . $suburi, '/');
-		}
-		return $name;
-	}
-
-	/**
-	 * Checks whether the user agent matches a given regex
-	 * @param array $agent array of agent names
-	 * @return bool true if at least one of the given agent matches, false otherwise
-	 */
-	public function isUserAgent(array $agent): bool {
-		if (!isset($this->server['HTTP_USER_AGENT'])) {
-			return false;
-		}
-		foreach ($agent as $regex) {
-			if (preg_match($regex, $this->server['HTTP_USER_AGENT'])) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * Returns the unverified server host from the headers without checking
-	 * whether it is a trusted domain
-	 * @return string Server host
-	 */
-	public function getInsecureServerHost(): string {
-		$host = 'localhost';
-		if (isset($this->server['HTTP_X_FORWARDED_HOST'])) {
-			if (strpos($this->server['HTTP_X_FORWARDED_HOST'], ',') !== false) {
-				$parts = explode(',', $this->server['HTTP_X_FORWARDED_HOST']);
-				$host = trim(current($parts));
-			} else {
-				$host = $this->server['HTTP_X_FORWARDED_HOST'];
-			}
-		} else {
-			if (isset($this->server['HTTP_HOST'])) {
-				$host = $this->server['HTTP_HOST'];
-			} else if (isset($this->server['SERVER_NAME'])) {
-				$host = $this->server['SERVER_NAME'];
-			}
-		}
-		return $host;
-	}
-
-
-	/**
-	 * Returns the server host from the headers, or the first configured
-	 * trusted domain if the host isn't in the trusted list
-	 * @return string Server host
-	 */
-	public function getServerHost(): string {
-		// overwritehost is always trusted
-		$host = $this->getOverwriteHost();
-		if ($host !== null) {
-			return $host;
-		}
-
-		// get the host from the headers
-		$host = $this->getInsecureServerHost();
-
-		// Verify that the host is a trusted domain if the trusted domains
-		// are defined
-		// If no trusted domain is provided the first trusted domain is returned
-		$trustedDomainHelper = new TrustedDomainHelper($this->config);
-		if ($trustedDomainHelper->isTrustedDomain($host)) {
-			return $host;
-		} else {
-			$trustedList = $this->config->getSystemValue('trusted_domains', []);
-			if(!empty($trustedList)) {
-				return $trustedList[0];
-			} else {
-				return '';
-			}
-		}
-	}
-
-	/**
-	 * Returns the overwritehost setting from the config if set and
-	 * if the overwrite condition is met
-	 * @return string|null overwritehost value or null if not defined or the defined condition
-	 * isn't met
-	 */
-	private function getOverwriteHost() {
-		if($this->config->getSystemValue('overwritehost') !== '' && $this->isOverwriteCondition()) {
-			return $this->config->getSystemValue('overwritehost');
-		}
-		return null;
-	}
+    const USER_AGENT_IE = '/(MSIE)|(Trident)/';
+    // Microsoft Edge User Agent from https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
+    const USER_AGENT_MS_EDGE = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+ Edge\/[0-9.]+$/';
+    // Firefox User Agent from https://developer.mozilla.org/en-US/docs/Web/HTTP/Gecko_user_agent_string_reference
+    const USER_AGENT_FIREFOX = '/^Mozilla\/5\.0 \([^)]+\) Gecko\/[0-9.]+ Firefox\/[0-9.]+$/';
+    // Chrome User Agent from https://developer.chrome.com/multidevice/user-agent
+    const USER_AGENT_CHROME = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\)( Ubuntu Chromium\/[0-9.]+|) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+$/';
+    // Safari User Agent from http://www.useragentstring.com/pages/Safari/
+    const USER_AGENT_SAFARI = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Version\/[0-9.]+ Safari\/[0-9.A-Z]+$/';
+    // Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
+    const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
+    const USER_AGENT_FREEBOX = '#^Mozilla/5\.0$#';
+    const REGEX_LOCALHOST = '/^(127\.0\.0\.1|localhost|::1)$/';
+
+    /**
+     * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_IOS instead
+     */
+    const USER_AGENT_OWNCLOUD_IOS = '/^Mozilla\/5\.0 \(iOS\) (ownCloud|Nextcloud)\-iOS.*$/';
+    /**
+     * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_ANDROID instead
+     */
+    const USER_AGENT_OWNCLOUD_ANDROID = '/^Mozilla\/5\.0 \(Android\) ownCloud\-android.*$/';
+    /**
+     * @deprecated use \OCP\IRequest::USER_AGENT_CLIENT_DESKTOP instead
+     */
+    const USER_AGENT_OWNCLOUD_DESKTOP = '/^Mozilla\/5\.0 \([A-Za-z ]+\) (mirall|csyncoC)\/.*$/';
+
+    protected $inputStream;
+    protected $content;
+    protected $items = [];
+    protected $allowedKeys = [
+        'get',
+        'post',
+        'files',
+        'server',
+        'env',
+        'cookies',
+        'urlParams',
+        'parameters',
+        'method',
+        'requesttoken',
+    ];
+    /** @var ISecureRandom */
+    protected $secureRandom;
+    /** @var IConfig */
+    protected $config;
+    /** @var string */
+    protected $requestId = '';
+    /** @var ICrypto */
+    protected $crypto;
+    /** @var CsrfTokenManager|null */
+    protected $csrfTokenManager;
+
+    /** @var bool */
+    protected $contentDecoded = false;
+
+    /**
+     * @param array $vars An associative array with the following optional values:
+     *        - array 'urlParams' the parameters which were matched from the URL
+     *        - array 'get' the $_GET array
+     *        - array|string 'post' the $_POST array or JSON string
+     *        - array 'files' the $_FILES array
+     *        - array 'server' the $_SERVER array
+     *        - array 'env' the $_ENV array
+     *        - array 'cookies' the $_COOKIE array
+     *        - string 'method' the request method (GET, POST etc)
+     *        - string|false 'requesttoken' the requesttoken or false when not available
+     * @param ISecureRandom $secureRandom
+     * @param IConfig $config
+     * @param CsrfTokenManager|null $csrfTokenManager
+     * @param string $stream
+     * @see http://www.php.net/manual/en/reserved.variables.php
+     */
+    public function __construct(array $vars= [],
+                                ISecureRandom $secureRandom = null,
+                                IConfig $config,
+                                CsrfTokenManager $csrfTokenManager = null,
+                                string $stream = 'php://input') {
+        $this->inputStream = $stream;
+        $this->items['params'] = [];
+        $this->secureRandom = $secureRandom;
+        $this->config = $config;
+        $this->csrfTokenManager = $csrfTokenManager;
+
+        if(!array_key_exists('method', $vars)) {
+            $vars['method'] = 'GET';
+        }
+
+        foreach($this->allowedKeys as $name) {
+            $this->items[$name] = isset($vars[$name])
+                ? $vars[$name]
+                : [];
+        }
+
+        $this->items['parameters'] = array_merge(
+            $this->items['get'],
+            $this->items['post'],
+            $this->items['urlParams'],
+            $this->items['params']
+        );
+
+    }
+    /**
+     * @param array $parameters
+     */
+    public function setUrlParameters(array $parameters) {
+        $this->items['urlParams'] = $parameters;
+        $this->items['parameters'] = array_merge(
+            $this->items['parameters'],
+            $this->items['urlParams']
+        );
+    }
+
+    /**
+     * Countable method
+     * @return int
+     */
+    public function count(): int {
+        return \count($this->items['parameters']);
+    }
+
+    /**
+     * ArrayAccess methods
+     *
+     * Gives access to the combined GET, POST and urlParams arrays
+     *
+     * Examples:
+     *
+     * $var = $request['myvar'];
+     *
+     * or
+     *
+     * if(!isset($request['myvar']) {
+     * 	// Do something
+     * }
+     *
+     * $request['myvar'] = 'something'; // This throws an exception.
+     *
+     * @param string $offset The key to lookup
+     * @return boolean
+     */
+    public function offsetExists($offset): bool {
+        return isset($this->items['parameters'][$offset]);
+    }
+
+    /**
+     * @see offsetExists
+     * @param string $offset
+     * @return mixed
+     */
+    public function offsetGet($offset) {
+        return isset($this->items['parameters'][$offset])
+            ? $this->items['parameters'][$offset]
+            : null;
+    }
+
+    /**
+     * @see offsetExists
+     * @param string $offset
+     * @param mixed $value
+     */
+    public function offsetSet($offset, $value) {
+        throw new \RuntimeException('You cannot change the contents of the request object');
+    }
+
+    /**
+     * @see offsetExists
+     * @param string $offset
+     */
+    public function offsetUnset($offset) {
+        throw new \RuntimeException('You cannot change the contents of the request object');
+    }
+
+    /**
+     * Magic property accessors
+     * @param string $name
+     * @param mixed $value
+     */
+    public function __set($name, $value) {
+        throw new \RuntimeException('You cannot change the contents of the request object');
+    }
+
+    /**
+     * Access request variables by method and name.
+     * Examples:
+     *
+     * $request->post['myvar']; // Only look for POST variables
+     * $request->myvar; or $request->{'myvar'}; or $request->{$myvar}
+     * Looks in the combined GET, POST and urlParams array.
+     *
+     * If you access e.g. ->post but the current HTTP request method
+     * is GET a \LogicException will be thrown.
+     *
+     * @param string $name The key to look for.
+     * @throws \LogicException
+     * @return mixed|null
+     */
+    public function __get($name) {
+        switch($name) {
+            case 'put':
+            case 'patch':
+            case 'get':
+            case 'post':
+                if($this->method !== strtoupper($name)) {
+                    throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
+                }
+                return $this->getContent();
+            case 'files':
+            case 'server':
+            case 'env':
+            case 'cookies':
+            case 'urlParams':
+            case 'method':
+                return isset($this->items[$name])
+                    ? $this->items[$name]
+                    : null;
+            case 'parameters':
+            case 'params':
+                return $this->getContent();
+            default;
+                return isset($this[$name])
+                    ? $this[$name]
+                    : null;
+        }
+    }
+
+    /**
+     * @param string $name
+     * @return bool
+     */
+    public function __isset($name) {
+        if (\in_array($name, $this->allowedKeys, true)) {
+            return true;
+        }
+        return isset($this->items['parameters'][$name]);
+    }
+
+    /**
+     * @param string $id
+     */
+    public function __unset($id) {
+        throw new \RuntimeException('You cannot change the contents of the request object');
+    }
+
+    /**
+     * Returns the value for a specific http header.
+     *
+     * This method returns null if the header did not exist.
+     *
+     * @param string $name
+     * @return string
+     */
+    public function getHeader(string $name): string {
+
+        $name = strtoupper(str_replace('-', '_',$name));
+        if (isset($this->server['HTTP_' . $name])) {
+            return $this->server['HTTP_' . $name];
+        }
+
+        // There's a few headers that seem to end up in the top-level
+        // server array.
+        switch ($name) {
+            case 'CONTENT_TYPE' :
+            case 'CONTENT_LENGTH' :
+                if (isset($this->server[$name])) {
+                    return $this->server[$name];
+                }
+                break;
+            case 'REMOTE_ADDR' :
+                if (isset($this->server[$name])) {
+                    return $this->server[$name];
+                }
+                break;
+        }
+
+        return '';
+    }
+
+    /**
+     * Lets you access post and get parameters by the index
+     * In case of json requests the encoded json body is accessed
+     *
+     * @param string $key the key which you want to access in the URL Parameter
+     *                     placeholder, $_POST or $_GET array.
+     *                     The priority how they're returned is the following:
+     *                     1. URL parameters
+     *                     2. POST parameters
+     *                     3. GET parameters
+     * @param mixed $default If the key is not found, this value will be returned
+     * @return mixed the content of the array
+     */
+    public function getParam(string $key, $default = null) {
+        return isset($this->parameters[$key])
+            ? $this->parameters[$key]
+            : $default;
+    }
+
+    /**
+     * Returns all params that were received, be it from the request
+     * (as GET or POST) or throuh the URL by the route
+     * @return array the array with all parameters
+     */
+    public function getParams(): array {
+        return is_array($this->parameters) ? $this->parameters : [];
+    }
+
+    /**
+     * Returns the method of the request
+     * @return string the method of the request (POST, GET, etc)
+     */
+    public function getMethod(): string {
+        return $this->method;
+    }
+
+    /**
+     * Shortcut for accessing an uploaded file through the $_FILES array
+     * @param string $key the key that will be taken from the $_FILES array
+     * @return array the file in the $_FILES element
+     */
+    public function getUploadedFile(string $key) {
+        return isset($this->files[$key]) ? $this->files[$key] : null;
+    }
+
+    /**
+     * Shortcut for getting env variables
+     * @param string $key the key that will be taken from the $_ENV array
+     * @return array the value in the $_ENV element
+     */
+    public function getEnv(string $key) {
+        return isset($this->env[$key]) ? $this->env[$key] : null;
+    }
+
+    /**
+     * Shortcut for getting cookie variables
+     * @param string $key the key that will be taken from the $_COOKIE array
+     * @return string the value in the $_COOKIE element
+     */
+    public function getCookie(string $key) {
+        return isset($this->cookies[$key]) ? $this->cookies[$key] : null;
+    }
+
+    /**
+     * Returns the request body content.
+     *
+     * If the HTTP request method is PUT and the body
+     * not application/x-www-form-urlencoded or application/json a stream
+     * resource is returned, otherwise an array.
+     *
+     * @return array|string|resource The request body content or a resource to read the body stream.
+     *
+     * @throws \LogicException
+     */
+    protected function getContent() {
+        // If the content can't be parsed into an array then return a stream resource.
+        if ($this->method === 'PUT'
+            && $this->getHeader('Content-Length') !== '0'
+            && $this->getHeader('Content-Length') !== ''
+            && strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') === false
+            && strpos($this->getHeader('Content-Type'), 'application/json') === false
+        ) {
+            if ($this->content === false) {
+                throw new \LogicException(
+                    '"put" can only be accessed once if not '
+                    . 'application/x-www-form-urlencoded or application/json.'
+                );
+            }
+            $this->content = false;
+            return fopen($this->inputStream, 'rb');
+        } else {
+            $this->decodeContent();
+            return $this->items['parameters'];
+        }
+    }
+
+    /**
+     * Attempt to decode the content and populate parameters
+     */
+    protected function decodeContent() {
+        if ($this->contentDecoded) {
+            return;
+        }
+        $params = [];
+
+        // 'application/json' must be decoded manually.
+        if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
+            $params = json_decode(file_get_contents($this->inputStream), true);
+            if($params !== null && \count($params) > 0) {
+                $this->items['params'] = $params;
+                if($this->method === 'POST') {
+                    $this->items['post'] = $params;
+                }
+            }
+
+        // Handle application/x-www-form-urlencoded for methods other than GET
+        // or post correctly
+        } elseif($this->method !== 'GET'
+                && $this->method !== 'POST'
+                && strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
+
+            parse_str(file_get_contents($this->inputStream), $params);
+            if(\is_array($params)) {
+                $this->items['params'] = $params;
+            }
+        }
+
+        if (\is_array($params)) {
+            $this->items['parameters'] = array_merge($this->items['parameters'], $params);
+        }
+        $this->contentDecoded = true;
+    }
+
+
+    /**
+     * Checks if the CSRF check was correct
+     * @return bool true if CSRF check passed
+     */
+    public function passesCSRFCheck(): bool {
+        if($this->csrfTokenManager === null) {
+            return false;
+        }
+
+        if(!$this->passesStrictCookieCheck()) {
+            return false;
+        }
+
+        if (isset($this->items['get']['requesttoken'])) {
+            $token = $this->items['get']['requesttoken'];
+        } elseif (isset($this->items['post']['requesttoken'])) {
+            $token = $this->items['post']['requesttoken'];
+        } elseif (isset($this->items['server']['HTTP_REQUESTTOKEN'])) {
+            $token = $this->items['server']['HTTP_REQUESTTOKEN'];
+        } else {
+            //no token found.
+            return false;
+        }
+        $token = new CsrfToken($token);
+
+        return $this->csrfTokenManager->isTokenValid($token);
+    }
+
+    /**
+     * Whether the cookie checks are required
+     *
+     * @return bool
+     */
+    private function cookieCheckRequired(): bool {
+        if ($this->getHeader('OCS-APIREQUEST')) {
+            return false;
+        }
+        if($this->getCookie(session_name()) === null && $this->getCookie('nc_token') === null) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Wrapper around session_get_cookie_params
+     *
+     * @return array
+     */
+    public function getCookieParams(): array {
+        return session_get_cookie_params();
+    }
+
+    /**
+     * Appends the __Host- prefix to the cookie if applicable
+     *
+     * @param string $name
+     * @return string
+     */
+    protected function getProtectedCookieName(string $name): string {
+        $cookieParams = $this->getCookieParams();
+        $prefix = '';
+        if($cookieParams['secure'] === true && $cookieParams['path'] === '/') {
+            $prefix = '__Host-';
+        }
+
+        return $prefix.$name;
+    }
+
+    /**
+     * Checks if the strict cookie has been sent with the request if the request
+     * is including any cookies.
+     *
+     * @return bool
+     * @since 9.1.0
+     */
+    public function passesStrictCookieCheck(): bool {
+        if(!$this->cookieCheckRequired()) {
+            return true;
+        }
+
+        $cookieName = $this->getProtectedCookieName('nc_sameSiteCookiestrict');
+        if($this->getCookie($cookieName) === 'true'
+            && $this->passesLaxCookieCheck()) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Checks if the lax cookie has been sent with the request if the request
+     * is including any cookies.
+     *
+     * @return bool
+     * @since 9.1.0
+     */
+    public function passesLaxCookieCheck(): bool {
+        if(!$this->cookieCheckRequired()) {
+            return true;
+        }
+
+        $cookieName = $this->getProtectedCookieName('nc_sameSiteCookielax');
+        if($this->getCookie($cookieName) === 'true') {
+            return true;
+        }
+        return false;
+    }
+
+
+    /**
+     * Returns an ID for the request, value is not guaranteed to be unique and is mostly meant for logging
+     * If `mod_unique_id` is installed this value will be taken.
+     * @return string
+     */
+    public function getId(): string {
+        if(isset($this->server['UNIQUE_ID'])) {
+            return $this->server['UNIQUE_ID'];
+        }
+
+        if(empty($this->requestId)) {
+            $validChars = ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS;
+            $this->requestId = $this->secureRandom->generate(20, $validChars);
+        }
+
+        return $this->requestId;
+    }
+
+    /**
+     * Returns the remote address, if the connection came from a trusted proxy
+     * and `forwarded_for_headers` has been configured then the IP address
+     * specified in this header will be returned instead.
+     * Do always use this instead of $_SERVER['REMOTE_ADDR']
+     * @return string IP address
+     */
+    public function getRemoteAddress(): string {
+        $remoteAddress = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
+        $trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
+
+        if(\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
+            $forwardedForHeaders = $this->config->getSystemValue('forwarded_for_headers', [
+                'HTTP_X_FORWARDED_FOR'
+                // only have one default, so we cannot ship an insecure product out of the box
+            ]);
+
+            foreach($forwardedForHeaders as $header) {
+                if(isset($this->server[$header])) {
+                    foreach(explode(',', $this->server[$header]) as $IP) {
+                        $IP = trim($IP);
+                        if (filter_var($IP, FILTER_VALIDATE_IP) !== false) {
+                            return $IP;
+                        }
+                    }
+                }
+            }
+        }
+
+        return $remoteAddress;
+    }
+
+    /**
+     * Check overwrite condition
+     * @param string $type
+     * @return bool
+     */
+    private function isOverwriteCondition(string $type = ''): bool {
+        $regex = '/' . $this->config->getSystemValue('overwritecondaddr', '')  . '/';
+        $remoteAddr = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
+        return $regex === '//' || preg_match($regex, $remoteAddr) === 1
+        || $type !== 'protocol';
+    }
+
+    /**
+     * Returns the server protocol. It respects one or more reverse proxies servers
+     * and load balancers
+     * @return string Server protocol (http or https)
+     */
+    public function getServerProtocol(): string {
+        if($this->config->getSystemValue('overwriteprotocol') !== ''
+            && $this->isOverwriteCondition('protocol')) {
+            return $this->config->getSystemValue('overwriteprotocol');
+        }
+
+        if (isset($this->server['HTTP_X_FORWARDED_PROTO'])) {
+            if (strpos($this->server['HTTP_X_FORWARDED_PROTO'], ',') !== false) {
+                $parts = explode(',', $this->server['HTTP_X_FORWARDED_PROTO']);
+                $proto = strtolower(trim($parts[0]));
+            } else {
+                $proto = strtolower($this->server['HTTP_X_FORWARDED_PROTO']);
+            }
+
+            // Verify that the protocol is always HTTP or HTTPS
+            // default to http if an invalid value is provided
+            return $proto === 'https' ? 'https' : 'http';
+        }
+
+        if (isset($this->server['HTTPS'])
+            && $this->server['HTTPS'] !== null
+            && $this->server['HTTPS'] !== 'off'
+            && $this->server['HTTPS'] !== '') {
+            return 'https';
+        }
+
+        return 'http';
+    }
+
+    /**
+     * Returns the used HTTP protocol.
+     *
+     * @return string HTTP protocol. HTTP/2, HTTP/1.1 or HTTP/1.0.
+     */
+    public function getHttpProtocol(): string {
+        $claimedProtocol = $this->server['SERVER_PROTOCOL'];
+
+        if (\is_string($claimedProtocol)) {
+            $claimedProtocol = strtoupper($claimedProtocol);
+        }
+
+        $validProtocols = [
+            'HTTP/1.0',
+            'HTTP/1.1',
+            'HTTP/2',
+        ];
+
+        if(\in_array($claimedProtocol, $validProtocols, true)) {
+            return $claimedProtocol;
+        }
+
+        return 'HTTP/1.1';
+    }
+
+    /**
+     * Returns the request uri, even if the website uses one or more
+     * reverse proxies
+     * @return string
+     */
+    public function getRequestUri(): string {
+        $uri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
+        if($this->config->getSystemValue('overwritewebroot') !== '' && $this->isOverwriteCondition()) {
+            $uri = $this->getScriptName() . substr($uri, \strlen($this->server['SCRIPT_NAME']));
+        }
+        return $uri;
+    }
+
+    /**
+     * Get raw PathInfo from request (not urldecoded)
+     * @throws \Exception
+     * @return string Path info
+     */
+    public function getRawPathInfo(): string {
+        $requestUri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
+        // remove too many leading slashes - can be caused by reverse proxy configuration
+        if (strpos($requestUri, '/') === 0) {
+            $requestUri = '/' . ltrim($requestUri, '/');
+        }
+
+        $requestUri = preg_replace('%/{2,}%', '/', $requestUri);
+
+        // Remove the query string from REQUEST_URI
+        if ($pos = strpos($requestUri, '?')) {
+            $requestUri = substr($requestUri, 0, $pos);
+        }
+
+        $scriptName = $this->server['SCRIPT_NAME'];
+        $pathInfo = $requestUri;
+
+        // strip off the script name's dir and file name
+        // FIXME: Sabre does not really belong here
+        list($path, $name) = \Sabre\Uri\split($scriptName);
+        if (!empty($path)) {
+            if($path === $pathInfo || strpos($pathInfo, $path.'/') === 0) {
+                $pathInfo = substr($pathInfo, \strlen($path));
+            } else {
+                throw new \Exception("The requested uri($requestUri) cannot be processed by the script '$scriptName')");
+            }
+        }
+        if ($name === null) {
+            $name = '';
+        }
+
+        if (strpos($pathInfo, '/'.$name) === 0) {
+            $pathInfo = substr($pathInfo, \strlen($name) + 1);
+        }
+        if ($name !== '' && strpos($pathInfo, $name) === 0) {
+            $pathInfo = substr($pathInfo, \strlen($name));
+        }
+        if($pathInfo === false || $pathInfo === '/'){
+            return '';
+        } else {
+            return $pathInfo;
+        }
+    }
+
+    /**
+     * Get PathInfo from request
+     * @throws \Exception
+     * @return string|false Path info or false when not found
+     */
+    public function getPathInfo() {
+        $pathInfo = $this->getRawPathInfo();
+        // following is taken from \Sabre\HTTP\URLUtil::decodePathSegment
+        $pathInfo = rawurldecode($pathInfo);
+        $encoding = mb_detect_encoding($pathInfo, ['UTF-8', 'ISO-8859-1']);
+
+        switch($encoding) {
+            case 'ISO-8859-1' :
+                $pathInfo = utf8_encode($pathInfo);
+        }
+        // end copy
+
+        return $pathInfo;
+    }
+
+    /**
+     * Returns the script name, even if the website uses one or more
+     * reverse proxies
+     * @return string the script name
+     */
+    public function getScriptName(): string {
+        $name = $this->server['SCRIPT_NAME'];
+        $overwriteWebRoot =  $this->config->getSystemValue('overwritewebroot');
+        if ($overwriteWebRoot !== '' && $this->isOverwriteCondition()) {
+            // FIXME: This code is untestable due to __DIR__, also that hardcoded path is really dangerous
+            $serverRoot = str_replace('\\', '/', substr(__DIR__, 0, -\strlen('lib/private/appframework/http/')));
+            $suburi = str_replace('\\', '/', substr(realpath($this->server['SCRIPT_FILENAME']), \strlen($serverRoot)));
+            $name = '/' . ltrim($overwriteWebRoot . $suburi, '/');
+        }
+        return $name;
+    }
+
+    /**
+     * Checks whether the user agent matches a given regex
+     * @param array $agent array of agent names
+     * @return bool true if at least one of the given agent matches, false otherwise
+     */
+    public function isUserAgent(array $agent): bool {
+        if (!isset($this->server['HTTP_USER_AGENT'])) {
+            return false;
+        }
+        foreach ($agent as $regex) {
+            if (preg_match($regex, $this->server['HTTP_USER_AGENT'])) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Returns the unverified server host from the headers without checking
+     * whether it is a trusted domain
+     * @return string Server host
+     */
+    public function getInsecureServerHost(): string {
+        $host = 'localhost';
+        if (isset($this->server['HTTP_X_FORWARDED_HOST'])) {
+            if (strpos($this->server['HTTP_X_FORWARDED_HOST'], ',') !== false) {
+                $parts = explode(',', $this->server['HTTP_X_FORWARDED_HOST']);
+                $host = trim(current($parts));
+            } else {
+                $host = $this->server['HTTP_X_FORWARDED_HOST'];
+            }
+        } else {
+            if (isset($this->server['HTTP_HOST'])) {
+                $host = $this->server['HTTP_HOST'];
+            } else if (isset($this->server['SERVER_NAME'])) {
+                $host = $this->server['SERVER_NAME'];
+            }
+        }
+        return $host;
+    }
+
+
+    /**
+     * Returns the server host from the headers, or the first configured
+     * trusted domain if the host isn't in the trusted list
+     * @return string Server host
+     */
+    public function getServerHost(): string {
+        // overwritehost is always trusted
+        $host = $this->getOverwriteHost();
+        if ($host !== null) {
+            return $host;
+        }
+
+        // get the host from the headers
+        $host = $this->getInsecureServerHost();
+
+        // Verify that the host is a trusted domain if the trusted domains
+        // are defined
+        // If no trusted domain is provided the first trusted domain is returned
+        $trustedDomainHelper = new TrustedDomainHelper($this->config);
+        if ($trustedDomainHelper->isTrustedDomain($host)) {
+            return $host;
+        } else {
+            $trustedList = $this->config->getSystemValue('trusted_domains', []);
+            if(!empty($trustedList)) {
+                return $trustedList[0];
+            } else {
+                return '';
+            }
+        }
+    }
+
+    /**
+     * Returns the overwritehost setting from the config if set and
+     * if the overwrite condition is met
+     * @return string|null overwritehost value or null if not defined or the defined condition
+     * isn't met
+     */
+    private function getOverwriteHost() {
+        if($this->config->getSystemValue('overwritehost') !== '' && $this->isOverwriteCondition()) {
+            return $this->config->getSystemValue('overwritehost');
+        }
+        return null;
+    }
 
 }

Spacing +40 added lines, -40 removed lines

@@ -132,7 +132,7 @@ 
 	 * @param string $stream
 	 * @see http://www.php.net/manual/en/reserved.variables.php
 	 */
-	public function __construct(array $vars= [],
+	public function __construct(array $vars = [],
 								ISecureRandom $secureRandom = null,
 								IConfig $config,
 								CsrfTokenManager $csrfTokenManager = null,
@@ -143,11 +143,11 @@ 
 		$this->config = $config;
 		$this->csrfTokenManager = $csrfTokenManager;
 
-		if(!array_key_exists('method', $vars)) {
+		if (!array_key_exists('method', $vars)) {
 			$vars['method'] = 'GET';
 		}
 
-		foreach($this->allowedKeys as $name) {
+		foreach ($this->allowedKeys as $name) {
 			$this->items[$name] = isset($vars[$name])
 				? $vars[$name]
 				: [];
@@ -257,12 +257,12 @@ 
 	* @return mixed|null
 	*/
 	public function __get($name) {
-		switch($name) {
+		switch ($name) {
 			case 'put':
 			case 'patch':
 			case 'get':
 			case 'post':
-				if($this->method !== strtoupper($name)) {
+				if ($this->method !== strtoupper($name)) {
 					throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
 				}
 				return $this->getContent();
@@ -313,9 +313,9 @@ 
 	 */
 	public function getHeader(string $name): string {
 
-		$name = strtoupper(str_replace('-', '_',$name));
-		if (isset($this->server['HTTP_' . $name])) {
-			return $this->server['HTTP_' . $name];
+		$name = strtoupper(str_replace('-', '_', $name));
+		if (isset($this->server['HTTP_'.$name])) {
+			return $this->server['HTTP_'.$name];
 		}
 
 		// There's a few headers that seem to end up in the top-level
@@ -445,21 +445,21 @@ 
 		// 'application/json' must be decoded manually.
 		if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
 			$params = json_decode(file_get_contents($this->inputStream), true);
-			if($params !== null && \count($params) > 0) {
+			if ($params !== null && \count($params) > 0) {
 				$this->items['params'] = $params;
-				if($this->method === 'POST') {
+				if ($this->method === 'POST') {
 					$this->items['post'] = $params;
 				}
 			}
 
 		// Handle application/x-www-form-urlencoded for methods other than GET
 		// or post correctly
-		} elseif($this->method !== 'GET'
+		} elseif ($this->method !== 'GET'
 				&& $this->method !== 'POST'
 				&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
 
 			parse_str(file_get_contents($this->inputStream), $params);
-			if(\is_array($params)) {
+			if (\is_array($params)) {
 				$this->items['params'] = $params;
 			}
 		}
@@ -476,11 +476,11 @@ 
 	 * @return bool true if CSRF check passed
 	 */
 	public function passesCSRFCheck(): bool {
-		if($this->csrfTokenManager === null) {
+		if ($this->csrfTokenManager === null) {
 			return false;
 		}
 
-		if(!$this->passesStrictCookieCheck()) {
+		if (!$this->passesStrictCookieCheck()) {
 			return false;
 		}
 
@@ -508,7 +508,7 @@ 
 		if ($this->getHeader('OCS-APIREQUEST')) {
 			return false;
 		}
-		if($this->getCookie(session_name()) === null && $this->getCookie('nc_token') === null) {
+		if ($this->getCookie(session_name()) === null && $this->getCookie('nc_token') === null) {
 			return false;
 		}
 
@@ -533,7 +533,7 @@ 
 	protected function getProtectedCookieName(string $name): string {
 		$cookieParams = $this->getCookieParams();
 		$prefix = '';
-		if($cookieParams['secure'] === true && $cookieParams['path'] === '/') {
+		if ($cookieParams['secure'] === true && $cookieParams['path'] === '/') {
 			$prefix = '__Host-';
 		}
 
@@ -548,12 +548,12 @@ 
 	 * @since 9.1.0
 	 */
 	public function passesStrictCookieCheck(): bool {
-		if(!$this->cookieCheckRequired()) {
+		if (!$this->cookieCheckRequired()) {
 			return true;
 		}
 
 		$cookieName = $this->getProtectedCookieName('nc_sameSiteCookiestrict');
-		if($this->getCookie($cookieName) === 'true'
+		if ($this->getCookie($cookieName) === 'true'
 			&& $this->passesLaxCookieCheck()) {
 			return true;
 		}
@@ -568,12 +568,12 @@ 
 	 * @since 9.1.0
 	 */
 	public function passesLaxCookieCheck(): bool {
-		if(!$this->cookieCheckRequired()) {
+		if (!$this->cookieCheckRequired()) {
 			return true;
 		}
 
 		$cookieName = $this->getProtectedCookieName('nc_sameSiteCookielax');
-		if($this->getCookie($cookieName) === 'true') {
+		if ($this->getCookie($cookieName) === 'true') {
 			return true;
 		}
 		return false;
@@ -586,12 +586,12 @@ 
 	 * @return string
 	 */
 	public function getId(): string {
-		if(isset($this->server['UNIQUE_ID'])) {
+		if (isset($this->server['UNIQUE_ID'])) {
 			return $this->server['UNIQUE_ID'];
 		}
 
-		if(empty($this->requestId)) {
-			$validChars = ISecureRandom::CHAR_UPPER . ISecureRandom::CHAR_LOWER . ISecureRandom::CHAR_DIGITS;
+		if (empty($this->requestId)) {
+			$validChars = ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_DIGITS;
 			$this->requestId = $this->secureRandom->generate(20, $validChars);
 		}
 
@@ -609,15 +609,15 @@ 
 		$remoteAddress = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
 		$trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
 
-		if(\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
+		if (\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
 			$forwardedForHeaders = $this->config->getSystemValue('forwarded_for_headers', [
 				'HTTP_X_FORWARDED_FOR'
 				// only have one default, so we cannot ship an insecure product out of the box
 			]);
 
-			foreach($forwardedForHeaders as $header) {
-				if(isset($this->server[$header])) {
-					foreach(explode(',', $this->server[$header]) as $IP) {
+			foreach ($forwardedForHeaders as $header) {
+				if (isset($this->server[$header])) {
+					foreach (explode(',', $this->server[$header]) as $IP) {
 						$IP = trim($IP);
 						if (filter_var($IP, FILTER_VALIDATE_IP) !== false) {
 							return $IP;
@@ -636,7 +636,7 @@ 
 	 * @return bool
 	 */
 	private function isOverwriteCondition(string $type = ''): bool {
-		$regex = '/' . $this->config->getSystemValue('overwritecondaddr', '')  . '/';
+		$regex = '/'.$this->config->getSystemValue('overwritecondaddr', '').'/';
 		$remoteAddr = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
 		return $regex === '//' || preg_match($regex, $remoteAddr) === 1
 		|| $type !== 'protocol';
@@ -648,7 +648,7 @@ 
 	 * @return string Server protocol (http or https)
 	 */
 	public function getServerProtocol(): string {
-		if($this->config->getSystemValue('overwriteprotocol') !== ''
+		if ($this->config->getSystemValue('overwriteprotocol') !== ''
 			&& $this->isOverwriteCondition('protocol')) {
 			return $this->config->getSystemValue('overwriteprotocol');
 		}
@@ -694,7 +694,7 @@ 
 			'HTTP/2',
 		];
 
-		if(\in_array($claimedProtocol, $validProtocols, true)) {
+		if (\in_array($claimedProtocol, $validProtocols, true)) {
 			return $claimedProtocol;
 		}
 
@@ -708,8 +708,8 @@ 
 	 */
 	public function getRequestUri(): string {
 		$uri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
-		if($this->config->getSystemValue('overwritewebroot') !== '' && $this->isOverwriteCondition()) {
-			$uri = $this->getScriptName() . substr($uri, \strlen($this->server['SCRIPT_NAME']));
+		if ($this->config->getSystemValue('overwritewebroot') !== '' && $this->isOverwriteCondition()) {
+			$uri = $this->getScriptName().substr($uri, \strlen($this->server['SCRIPT_NAME']));
 		}
 		return $uri;
 	}
@@ -723,7 +723,7 @@ 
 		$requestUri = isset($this->server['REQUEST_URI']) ? $this->server['REQUEST_URI'] : '';
 		// remove too many leading slashes - can be caused by reverse proxy configuration
 		if (strpos($requestUri, '/') === 0) {
-			$requestUri = '/' . ltrim($requestUri, '/');
+			$requestUri = '/'.ltrim($requestUri, '/');
 		}
 
 		$requestUri = preg_replace('%/{2,}%', '/', $requestUri);
@@ -740,7 +740,7 @@ 
 		// FIXME: Sabre does not really belong here
 		list($path, $name) = \Sabre\Uri\split($scriptName);
 		if (!empty($path)) {
-			if($path === $pathInfo || strpos($pathInfo, $path.'/') === 0) {
+			if ($path === $pathInfo || strpos($pathInfo, $path.'/') === 0) {
 				$pathInfo = substr($pathInfo, \strlen($path));
 			} else {
 				throw new \Exception("The requested uri($requestUri) cannot be processed by the script '$scriptName')");
@@ -756,7 +756,7 @@ 
 		if ($name !== '' && strpos($pathInfo, $name) === 0) {
 			$pathInfo = substr($pathInfo, \strlen($name));
 		}
-		if($pathInfo === false || $pathInfo === '/'){
+		if ($pathInfo === false || $pathInfo === '/') {
 			return '';
 		} else {
 			return $pathInfo;
@@ -774,7 +774,7 @@ 
 		$pathInfo = rawurldecode($pathInfo);
 		$encoding = mb_detect_encoding($pathInfo, ['UTF-8', 'ISO-8859-1']);
 
-		switch($encoding) {
+		switch ($encoding) {
 			case 'ISO-8859-1' :
 				$pathInfo = utf8_encode($pathInfo);
 		}
@@ -790,12 +790,12 @@ 
 	 */
 	public function getScriptName(): string {
 		$name = $this->server['SCRIPT_NAME'];
-		$overwriteWebRoot =  $this->config->getSystemValue('overwritewebroot');
+		$overwriteWebRoot = $this->config->getSystemValue('overwritewebroot');
 		if ($overwriteWebRoot !== '' && $this->isOverwriteCondition()) {
 			// FIXME: This code is untestable due to __DIR__, also that hardcoded path is really dangerous
 			$serverRoot = str_replace('\\', '/', substr(__DIR__, 0, -\strlen('lib/private/appframework/http/')));
 			$suburi = str_replace('\\', '/', substr(realpath($this->server['SCRIPT_FILENAME']), \strlen($serverRoot)));
-			$name = '/' . ltrim($overwriteWebRoot . $suburi, '/');
+			$name = '/'.ltrim($overwriteWebRoot.$suburi, '/');
 		}
 		return $name;
 	}
@@ -865,7 +865,7 @@ 
 			return $host;
 		} else {
 			$trustedList = $this->config->getSystemValue('trusted_domains', []);
-			if(!empty($trustedList)) {
+			if (!empty($trustedList)) {
 				return $trustedList[0];
 			} else {
 				return '';
@@ -880,7 +880,7 @@ 
 	 * isn't met
 	 */
 	private function getOverwriteHost() {
-		if($this->config->getSystemValue('overwritehost') !== '' && $this->isOverwriteCondition()) {
+		if ($this->config->getSystemValue('overwritehost') !== '' && $this->isOverwriteCondition()) {
 			return $this->config->getSystemValue('overwritehost');
 		}
 		return null;

settings/Controller/CheckSetupController.php

Indentation +552 added lines, -552 removed lines

@@ -63,293 +63,293 @@ 
  * @package OC\Settings\Controller
  */
 class CheckSetupController extends Controller {
-	/** @var IConfig */
-	private $config;
-	/** @var IClientService */
-	private $clientService;
-	/** @var \OC_Util */
-	private $util;
-	/** @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,
-								\OC_Util $util,
-								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->util = $util;
-		$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 = $secureRandom;
-	}
-
-	/**
-	 * Checks if the server can connect to the internet using HTTPS and HTTP
-	 * @return bool
-	 */
-	private function isInternetConnectionWorking() {
-		if ($this->config->getSystemValue('has_internet_connection', true) === false) {
-			return false;
-		}
-
-		$siteArray = ['www.nextcloud.com',
-						'www.startpage.com',
-						'www.eff.org',
-						'www.edri.org',
-			];
-
-		foreach($siteArray as $site) {
-			if ($this->isSiteReachable($site)) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	/**
-	* Checks if the Nextcloud server can connect to a specific URL using both HTTPS and HTTP
-	* @return bool
-	*/
-	private function isSiteReachable($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, '7.0.0', '<')) {
-			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 = $this->request->getHeader('REMOTE_ADDR');
-
-		if (\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
-			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 \OC_Util */
+    private $util;
+    /** @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,
+                                \OC_Util $util,
+                                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->util = $util;
+        $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 = $secureRandom;
+    }
+
+    /**
+     * Checks if the server can connect to the internet using HTTPS and HTTP
+     * @return bool
+     */
+    private function isInternetConnectionWorking() {
+        if ($this->config->getSystemValue('has_internet_connection', true) === false) {
+            return false;
+        }
+
+        $siteArray = ['www.nextcloud.com',
+                        'www.startpage.com',
+                        'www.eff.org',
+                        'www.edri.org',
+            ];
+
+        foreach($siteArray as $site) {
+            if ($this->isSiteReachable($site)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Checks if the Nextcloud server can connect to a specific URL using both HTTPS and HTTP
+     * @return bool
+     */
+    private function isSiteReachable($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, '7.0.0', '<')) {
+            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 = $this->request->getHeader('REMOTE_ADDR');
+
+        if (\is_array($trustedProxies) && \in_array($remoteAddress, $trustedProxies)) {
+            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)) {
+            $formattedTextResponse = 'Technical information
 =====================
 The following list covers which files have failed the integrity check. Please read
 the previous linked documentation to learn more about the errors and how to fix
@@ -358,272 +358,272 @@ 
 Results
 =======
 ';
-			foreach($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->getBool('opcache.enable_cli')) {
-			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();
-	}
-
-	/**
-	 * warn if outdated version of a memcache module is used
-	 */
-	protected function getOutdatedCaches(): array {
-		$caches = [
-			'apcu'	=> ['name' => 'APCu', 'version' => '4.0.6'],
-			'redis'	=> ['name' => 'Redis', 'version' => '2.2.5'],
-		];
-		$outdatedCaches = [];
-		foreach ($caches as $php_module => $data) {
-			$isOutdated = extension_loaded($php_module) && version_compare(phpversion($php_module), $data['version'], '<');
-			if ($isOutdated) {
-				$outdatedCaches[] = $data;
-			}
-		}
-
-		return $outdatedCaches;
-	}
-
-	protected function isSqliteUsed() {
-		return strpos($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', 'php') === '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;
-	}
-
-	/**
-	 * @return DataResponse
-	 */
-	public function check() {
-		return new DataResponse(
-			[
-				'isGetenvServerWorking' => !empty(getenv('PATH')),
-				'isReadOnlyConfig' => $this->isReadOnlyConfig(),
-				'hasValidTransactionIsolationLevel' => $this->hasValidTransactionIsolationLevel(),
-				'outdatedCaches' => $this->getOutdatedCaches(),
-				'hasFileinfoInstalled' => $this->hasFileinfoInstalled(),
-				'hasWorkingFileLocking' => $this->hasWorkingFileLocking(),
-				'suggestedOverwriteCliURL' => $this->getSuggestedOverwriteCliURL(),
-				'cronInfo' => $this->getLastCronInfo(),
-				'cronErrors' => $this->getCronErrors(),
-				'serverHasInternetConnection' => $this->isInternetConnectionWorking(),
-				'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(),
-			]
-		);
-	}
+            $formattedTextResponse .= print_r($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->getBool('opcache.enable_cli')) {
+            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();
+    }
+
+    /**
+     * warn if outdated version of a memcache module is used
+     */
+    protected function getOutdatedCaches(): array {
+        $caches = [
+            'apcu'	=> ['name' => 'APCu', 'version' => '4.0.6'],
+            'redis'	=> ['name' => 'Redis', 'version' => '2.2.5'],
+        ];
+        $outdatedCaches = [];
+        foreach ($caches as $php_module => $data) {
+            $isOutdated = extension_loaded($php_module) && version_compare(phpversion($php_module), $data['version'], '<');
+            if ($isOutdated) {
+                $outdatedCaches[] = $data;
+            }
+        }
+
+        return $outdatedCaches;
+    }
+
+    protected function isSqliteUsed() {
+        return strpos($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', 'php') === '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;
+    }
+
+    /**
+     * @return DataResponse
+     */
+    public function check() {
+        return new DataResponse(
+            [
+                'isGetenvServerWorking' => !empty(getenv('PATH')),
+                'isReadOnlyConfig' => $this->isReadOnlyConfig(),
+                'hasValidTransactionIsolationLevel' => $this->hasValidTransactionIsolationLevel(),
+                'outdatedCaches' => $this->getOutdatedCaches(),
+                'hasFileinfoInstalled' => $this->hasFileinfoInstalled(),
+                'hasWorkingFileLocking' => $this->hasWorkingFileLocking(),
+                'suggestedOverwriteCliURL' => $this->getSuggestedOverwriteCliURL(),
+                'cronInfo' => $this->getLastCronInfo(),
+                'cronErrors' => $this->getCronErrors(),
+                'serverHasInternetConnection' => $this->isInternetConnectionWorking(),
+                '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(),
+            ]
+        );
+    }
 }