775 lines
22 KiB
PHP
775 lines
22 KiB
PHP
<?php
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/**
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Bernhard Posselt <dev@bernhard-posselt.com>
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Mitar <mitar.git@tnode.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <icewind@owncloud.com>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <rullzer@owncloud.com>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Thomas Tanghus <thomas@tanghus.net>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\AppFramework\Http;
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use OC\Security\CSRF\CsrfToken;
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use OC\Security\CSRF\CsrfTokenManager;
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use OC\Security\TrustedDomainHelper;
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use OCP\IConfig;
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use OCP\IRequest;
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use OCP\Security\ICrypto;
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use OCP\Security\ISecureRandom;
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/**
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* Class for accessing variables in the request.
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* This class provides an immutable object with request variables.
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*
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* @property mixed[] cookies
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* @property mixed[] env
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* @property mixed[] files
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* @property string method
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* @property mixed[] parameters
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* @property mixed[] server
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*/
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class Request implements \ArrayAccess, \Countable, IRequest {
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const USER_AGENT_IE = '/(MSIE)|(Trident)/';
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const USER_AGENT_IE_8 = '/MSIE 8.0/';
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// Microsoft Edge User Agent from https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
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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.]+$/';
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// Firefox User Agent from https://developer.mozilla.org/en-US/docs/Web/HTTP/Gecko_user_agent_string_reference
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const USER_AGENT_FIREFOX = '/^Mozilla\/5\.0 \([^)]+\) Gecko\/[0-9.]+ Firefox\/[0-9.]+$/';
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// Chrome User Agent from https://developer.chrome.com/multidevice/user-agent
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const USER_AGENT_CHROME = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Chrome\/[0-9.]+ (Mobile Safari|Safari)\/[0-9.]+$/';
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// Safari User Agent from http://www.useragentstring.com/pages/Safari/
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const USER_AGENT_SAFARI = '/^Mozilla\/5\.0 \([^)]+\) AppleWebKit\/[0-9.]+ \(KHTML, like Gecko\) Version\/[0-9.]+ Safari\/[0-9.A-Z]+$/';
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// Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
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const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
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const USER_AGENT_FREEBOX = '#^Mozilla/5\.0$#';
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const USER_AGENT_OWNCLOUD_IOS = '/^Mozilla\/5\.0 \(iOS\) ownCloud\-iOS.*$/';
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const USER_AGENT_OWNCLOUD_ANDROID = '/^Mozilla\/5\.0 \(Android\) ownCloud\-android.*$/';
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const USER_AGENT_OWNCLOUD_DESKTOP = '/^Mozilla\/5\.0 \([A-Za-z ]+\) (mirall|csyncoC)\/.*$/';
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const REGEX_LOCALHOST = '/^(127\.0\.0\.1|localhost)$/';
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protected $inputStream;
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protected $content;
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protected $items = array();
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protected $allowedKeys = array(
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'get',
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'post',
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'files',
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'server',
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'env',
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'cookies',
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'urlParams',
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'parameters',
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'method',
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'requesttoken',
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);
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/** @var ISecureRandom */
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protected $secureRandom;
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/** @var IConfig */
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protected $config;
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/** @var string */
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protected $requestId = '';
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/** @var ICrypto */
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protected $crypto;
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/** @var CsrfTokenManager|null */
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protected $csrfTokenManager;
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/** @var bool */
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protected $contentDecoded = false;
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/**
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* @param array $vars An associative array with the following optional values:
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* - array 'urlParams' the parameters which were matched from the URL
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* - array 'get' the $_GET array
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* - array|string 'post' the $_POST array or JSON string
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* - array 'files' the $_FILES array
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* - array 'server' the $_SERVER array
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* - array 'env' the $_ENV array
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* - array 'cookies' the $_COOKIE array
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* - string 'method' the request method (GET, POST etc)
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* - string|false 'requesttoken' the requesttoken or false when not available
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* @param ISecureRandom $secureRandom
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* @param IConfig $config
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* @param CsrfTokenManager|null $csrfTokenManager
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* @param string $stream
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* @see http://www.php.net/manual/en/reserved.variables.php
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*/
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public function __construct(array $vars=array(),
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ISecureRandom $secureRandom = null,
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IConfig $config,
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CsrfTokenManager $csrfTokenManager = null,
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$stream = 'php://input') {
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$this->inputStream = $stream;
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$this->items['params'] = array();
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$this->secureRandom = $secureRandom;
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$this->config = $config;
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$this->csrfTokenManager = $csrfTokenManager;
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if(!array_key_exists('method', $vars)) {
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$vars['method'] = 'GET';
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}
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foreach($this->allowedKeys as $name) {
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$this->items[$name] = isset($vars[$name])
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? $vars[$name]
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: array();
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}
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$this->items['parameters'] = array_merge(
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$this->items['get'],
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$this->items['post'],
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$this->items['urlParams'],
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$this->items['params']
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);
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}
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/**
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* @param array $parameters
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*/
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public function setUrlParameters(array $parameters) {
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$this->items['urlParams'] = $parameters;
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$this->items['parameters'] = array_merge(
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$this->items['parameters'],
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$this->items['urlParams']
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);
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}
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/**
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* Countable method
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* @return int
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*/
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public function count() {
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return count(array_keys($this->items['parameters']));
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}
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/**
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* ArrayAccess methods
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*
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* Gives access to the combined GET, POST and urlParams arrays
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*
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* Examples:
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*
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* $var = $request['myvar'];
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*
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* or
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*
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* if(!isset($request['myvar']) {
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* // Do something
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* }
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*
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* $request['myvar'] = 'something'; // This throws an exception.
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*
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* @param string $offset The key to lookup
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* @return boolean
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*/
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public function offsetExists($offset) {
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return isset($this->items['parameters'][$offset]);
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}
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/**
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* @see offsetExists
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*/
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public function offsetGet($offset) {
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return isset($this->items['parameters'][$offset])
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? $this->items['parameters'][$offset]
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: null;
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}
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/**
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* @see offsetExists
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*/
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public function offsetSet($offset, $value) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* @see offsetExists
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*/
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public function offsetUnset($offset) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* Magic property accessors
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* @param string $name
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* @param mixed $value
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*/
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public function __set($name, $value) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* Access request variables by method and name.
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* Examples:
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*
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* $request->post['myvar']; // Only look for POST variables
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* $request->myvar; or $request->{'myvar'}; or $request->{$myvar}
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* Looks in the combined GET, POST and urlParams array.
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*
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* If you access e.g. ->post but the current HTTP request method
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* is GET a \LogicException will be thrown.
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*
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* @param string $name The key to look for.
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* @throws \LogicException
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* @return mixed|null
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*/
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public function __get($name) {
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switch($name) {
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case 'put':
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case 'patch':
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case 'get':
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case 'post':
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if($this->method !== strtoupper($name)) {
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throw new \LogicException(sprintf('%s cannot be accessed in a %s request.', $name, $this->method));
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}
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return $this->getContent();
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case 'files':
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case 'server':
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case 'env':
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case 'cookies':
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case 'urlParams':
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case 'method':
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return isset($this->items[$name])
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? $this->items[$name]
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: null;
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case 'parameters':
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case 'params':
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return $this->getContent();
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default;
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return isset($this[$name])
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? $this[$name]
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: null;
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}
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}
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/**
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* @param string $name
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* @return bool
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*/
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public function __isset($name) {
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if (in_array($name, $this->allowedKeys, true)) {
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return true;
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}
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return isset($this->items['parameters'][$name]);
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}
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/**
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* @param string $id
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*/
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public function __unset($id) {
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throw new \RuntimeException('You cannot change the contents of the request object');
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}
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/**
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* Returns the value for a specific http header.
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*
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* This method returns null if the header did not exist.
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*
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* @param string $name
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* @return string
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*/
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public function getHeader($name) {
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$name = strtoupper(str_replace(array('-'),array('_'),$name));
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if (isset($this->server['HTTP_' . $name])) {
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return $this->server['HTTP_' . $name];
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}
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// There's a few headers that seem to end up in the top-level
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// server array.
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switch($name) {
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case 'CONTENT_TYPE' :
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case 'CONTENT_LENGTH' :
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if (isset($this->server[$name])) {
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return $this->server[$name];
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}
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break;
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}
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return null;
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}
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/**
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* Lets you access post and get parameters by the index
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* In case of json requests the encoded json body is accessed
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*
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* @param string $key the key which you want to access in the URL Parameter
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* placeholder, $_POST or $_GET array.
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* The priority how they're returned is the following:
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* 1. URL parameters
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* 2. POST parameters
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* 3. GET parameters
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* @param mixed $default If the key is not found, this value will be returned
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* @return mixed the content of the array
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*/
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public function getParam($key, $default = null) {
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return isset($this->parameters[$key])
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? $this->parameters[$key]
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: $default;
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}
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/**
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* Returns all params that were received, be it from the request
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* (as GET or POST) or throuh the URL by the route
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* @return array the array with all parameters
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*/
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public function getParams() {
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return $this->parameters;
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}
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/**
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* Returns the method of the request
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* @return string the method of the request (POST, GET, etc)
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*/
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public function getMethod() {
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return $this->method;
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}
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/**
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* Shortcut for accessing an uploaded file through the $_FILES array
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* @param string $key the key that will be taken from the $_FILES array
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* @return array the file in the $_FILES element
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*/
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public function getUploadedFile($key) {
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return isset($this->files[$key]) ? $this->files[$key] : null;
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}
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/**
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* Shortcut for getting env variables
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* @param string $key the key that will be taken from the $_ENV array
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* @return array the value in the $_ENV element
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*/
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public function getEnv($key) {
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return isset($this->env[$key]) ? $this->env[$key] : null;
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}
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/**
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* Shortcut for getting cookie variables
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* @param string $key the key that will be taken from the $_COOKIE array
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* @return string the value in the $_COOKIE element
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*/
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public function getCookie($key) {
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return isset($this->cookies[$key]) ? $this->cookies[$key] : null;
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}
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/**
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* Returns the request body content.
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*
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* If the HTTP request method is PUT and the body
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* not application/x-www-form-urlencoded or application/json a stream
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* resource is returned, otherwise an array.
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*
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* @return array|string|resource The request body content or a resource to read the body stream.
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*
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* @throws \LogicException
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*/
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protected function getContent() {
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// If the content can't be parsed into an array then return a stream resource.
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if ($this->method === 'PUT'
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&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') === false
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&& strpos($this->getHeader('Content-Type'), 'application/json') === false
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) {
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if ($this->content === false) {
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throw new \LogicException(
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'"put" can only be accessed once if not '
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. 'application/x-www-form-urlencoded or application/json.'
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);
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}
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$this->content = false;
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return fopen($this->inputStream, 'rb');
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} else {
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$this->decodeContent();
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return $this->items['parameters'];
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}
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}
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/**
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* Attempt to decode the content and populate parameters
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*/
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protected function decodeContent() {
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if ($this->contentDecoded) {
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return;
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}
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$params = [];
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// 'application/json' must be decoded manually.
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if (strpos($this->getHeader('Content-Type'), 'application/json') !== false) {
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$params = json_decode(file_get_contents($this->inputStream), true);
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if(count($params) > 0) {
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$this->items['params'] = $params;
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if($this->method === 'POST') {
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$this->items['post'] = $params;
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}
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}
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// Handle application/x-www-form-urlencoded for methods other than GET
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// or post correctly
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} elseif($this->method !== 'GET'
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&& $this->method !== 'POST'
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&& strpos($this->getHeader('Content-Type'), 'application/x-www-form-urlencoded') !== false) {
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parse_str(file_get_contents($this->inputStream), $params);
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if(is_array($params)) {
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$this->items['params'] = $params;
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}
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}
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if (is_array($params)) {
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$this->items['parameters'] = array_merge($this->items['parameters'], $params);
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}
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$this->contentDecoded = true;
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}
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/**
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* Checks if the CSRF check was correct
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* @return bool true if CSRF check passed
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*/
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public function passesCSRFCheck() {
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if($this->csrfTokenManager === null) {
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return false;
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}
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if (isset($this->items['get']['requesttoken'])) {
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$token = $this->items['get']['requesttoken'];
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} elseif (isset($this->items['post']['requesttoken'])) {
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$token = $this->items['post']['requesttoken'];
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} elseif (isset($this->items['server']['HTTP_REQUESTTOKEN'])) {
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$token = $this->items['server']['HTTP_REQUESTTOKEN'];
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} else {
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//no token found.
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return false;
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}
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$token = new CsrfToken($token);
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return $this->csrfTokenManager->isTokenValid($token);
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}
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/**
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* Returns an ID for the request, value is not guaranteed to be unique and is mostly meant for logging
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* If `mod_unique_id` is installed this value will be taken.
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* @return string
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*/
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public function getId() {
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if(isset($this->server['UNIQUE_ID'])) {
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return $this->server['UNIQUE_ID'];
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}
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if(empty($this->requestId)) {
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$this->requestId = $this->secureRandom->generate(20);
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}
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return $this->requestId;
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}
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/**
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* Returns the remote address, if the connection came from a trusted proxy
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* and `forwarded_for_headers` has been configured then the IP address
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* specified in this header will be returned instead.
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* Do always use this instead of $_SERVER['REMOTE_ADDR']
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* @return string IP address
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*/
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public function getRemoteAddress() {
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$remoteAddress = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
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$trustedProxies = $this->config->getSystemValue('trusted_proxies', []);
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if(is_array($trustedProxies) && in_array($remoteAddress, $trustedProxies)) {
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$forwardedForHeaders = $this->config->getSystemValue('forwarded_for_headers', [
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'HTTP_X_FORWARDED_FOR'
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// only have one default, so we cannot ship an insecure product out of the box
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]);
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foreach($forwardedForHeaders as $header) {
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if(isset($this->server[$header])) {
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foreach(explode(',', $this->server[$header]) as $IP) {
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$IP = trim($IP);
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if (filter_var($IP, FILTER_VALIDATE_IP) !== false) {
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return $IP;
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}
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}
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}
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}
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}
|
|
|
|
return $remoteAddress;
|
|
}
|
|
|
|
/**
|
|
* Check overwrite condition
|
|
* @param string $type
|
|
* @return bool
|
|
*/
|
|
private function isOverwriteCondition($type = '') {
|
|
$regex = '/' . $this->config->getSystemValue('overwritecondaddr', '') . '/';
|
|
$remoteAddr = isset($this->server['REMOTE_ADDR']) ? $this->server['REMOTE_ADDR'] : '';
|
|
return $regex === '//' || preg_match($regex, $remoteAddr) === 1
|
|
|| $type !== 'protocol';
|
|
}
|
|
|
|
/**
|
|
* Returns the server protocol. It respects one or more reverse proxies servers
|
|
* and load balancers
|
|
* @return string Server protocol (http or https)
|
|
*/
|
|
public function getServerProtocol() {
|
|
if($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() {
|
|
$claimedProtocol = strtoupper($this->server['SERVER_PROTOCOL']);
|
|
|
|
$validProtocols = [
|
|
'HTTP/1.0',
|
|
'HTTP/1.1',
|
|
'HTTP/2',
|
|
];
|
|
|
|
if(in_array($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() {
|
|
$uri = isset($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() {
|
|
$requestUri = isset($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, $name) = \Sabre\HTTP\URLUtil::splitPath($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 '$scriptName')");
|
|
}
|
|
}
|
|
if (strpos($pathInfo, '/'.$name) === 0) {
|
|
$pathInfo = substr($pathInfo, strlen($name) + 1);
|
|
}
|
|
if (strpos($pathInfo, $name) === 0) {
|
|
$pathInfo = substr($pathInfo, strlen($name));
|
|
}
|
|
if($pathInfo === false || $pathInfo === '/'){
|
|
return '';
|
|
} else {
|
|
return $pathInfo;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get PathInfo from request
|
|
* @throws \Exception
|
|
* @return string|false Path info or false when not found
|
|
*/
|
|
public function getPathInfo() {
|
|
if(isset($this->server['PATH_INFO'])) {
|
|
return $this->server['PATH_INFO'];
|
|
}
|
|
|
|
$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() {
|
|
$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 $agent) {
|
|
if (!isset($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() {
|
|
$host = 'localhost';
|
|
if (isset($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() {
|
|
// 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;
|
|
}
|
|
|
|
}
|