1<?php
2/**
3 * Matomo - free/libre analytics platform
4 *
5 * @link https://matomo.org
6 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
7 */
8
9namespace Piwik\Config;
10
11use Matomo\Cache\Backend\File;
12use Piwik\Common;
13use Piwik\Piwik;
14use Piwik\Url;
15
16/**
17 * Exception thrown when the config file doesn't exist.
18 */
19class Cache extends File
20{
21    private $host = '';
22
23    public function __construct()
24    {
25        $this->host = $this->getHost();
26
27        // because the config is not yet loaded we cannot identify the instanceId...
28        // need to use the hostname
29        $dir = $this->makeCacheDir($this->host);
30
31        parent::__construct($dir);
32    }
33
34    private function makeCacheDir($host)
35    {
36        return PIWIK_INCLUDE_PATH . '/tmp/' . $host . '/cache/tracker';
37    }
38
39    public function isValidHost($mergedConfigSettings)
40    {
41        if (!isset($mergedConfigSettings['General']['trusted_hosts']) || !is_array($mergedConfigSettings['General']['trusted_hosts'])) {
42            return false;
43        }
44        // note: we do not support "enable_trusted_host_check" to keep things secure
45        return in_array($this->host, $mergedConfigSettings['General']['trusted_hosts'], true);
46    }
47
48    private function getHost()
49    {
50        $host = Url::getHost($checkIfTrusted = false);
51        $host = Url::getHostSanitized($host); // Remove any port number to get actual hostname
52        $host = Common::sanitizeInputValue($host);
53
54        if (empty($host)
55            || strpos($host, '..') !== false
56            || strpos($host, '\\') !== false
57            || strpos($host, '/') !== false) {
58            throw new \Exception('Unsupported host');
59        }
60
61        $this->host = $host;
62
63        return $host;
64    }
65
66    public function doDelete($id)
67    {
68        // when the config changes, we need to invalidate the config caches for all configured hosts as well, not only
69        // the currently trusted host
70        $hosts = Url::getTrustedHosts();
71        $initialDir = $this->directory;
72
73        foreach ($hosts as $host)
74        {
75            $dir = $this->makeCacheDir($host);
76            if (@is_dir($dir)) {
77                $this->directory = $dir;
78                $success = parent::doDelete($id);
79                if ($success) {
80                    Piwik::postEvent('Core.configFileDeleted', array($this->getFilename($id)));
81                }
82            }
83        }
84
85        $this->directory = $initialDir;
86    }
87
88}
89