1 | <?php |
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2 | /** |
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3 | * Clean.php |
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4 | * |
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5 | * -Description- |
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6 | * |
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7 | * This program is free software: you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation, either version 3 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
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19 | * |
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20 | * @link https://www.librenms.org |
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21 | * |
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22 | * @copyright 2019 Tony Murray |
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23 | * @author Tony Murray <[email protected]> |
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24 | */ |
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25 | |||
26 | namespace LibreNMS\Util; |
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27 | |||
28 | use HTMLPurifier; |
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29 | use HTMLPurifier_Config; |
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30 | use LibreNMS\Config; |
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31 | |||
32 | class Clean |
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33 | { |
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34 | /** |
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35 | * Sanitize file name by removing all invalid characters. |
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36 | * Does not make the string safe for javascript or sql! |
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37 | * |
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38 | * @param string $file |
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39 | * @return string|string[]|null |
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40 | */ |
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41 | public static function fileName($file) |
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42 | { |
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43 | return preg_replace('/[^a-zA-Z0-9\-._]/', '', $file); |
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44 | } |
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45 | |||
46 | /** |
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47 | * Sanitize string to only contain alpha, numeric, dashes, and underscores |
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48 | * |
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49 | * @param string $string |
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50 | * @return string |
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51 | */ |
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52 | public static function alphaDash($string) |
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53 | { |
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54 | return preg_replace('/[^a-zA-Z0-9\-_]/', '', $string); |
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55 | } |
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56 | |||
57 | /** |
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58 | * Sanitize string to only contain alpha, numeric, dashes, underscores, and spaces |
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59 | * |
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60 | * @param string $string |
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61 | * @return string |
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62 | */ |
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63 | public static function alphaDashSpace($string) |
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64 | { |
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65 | return preg_replace('/[^a-zA-Z0-9\-_ ]/', '', $string); |
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66 | } |
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67 | |||
68 | /** |
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69 | * Clean a string for display in an html page. |
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70 | * For use in non-blade pages |
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71 | * |
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72 | * @param string $value |
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73 | * @param array $purifier_config (key, value pair) |
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74 | * @return string |
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75 | */ |
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76 | public static function html($value, $purifier_config = []) |
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77 | { |
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78 | /** @var HTMLPurifier $purifier */ |
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79 | static $purifier; |
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80 | |||
81 | // If $purifier_config is non-empty then we don't want |
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82 | // to convert html tags and allow these to be controlled |
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83 | // by purifier instead. |
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84 | if (empty($purifier_config)) { |
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85 | $value = htmlentities($value); |
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86 | } |
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87 | |||
88 | if (! $purifier instanceof HTMLPurifier) { |
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89 | // initialize HTML Purifier here since this is the only user |
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90 | $p_config = HTMLPurifier_Config::createDefault(); |
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91 | $p_config->set('Cache.SerializerPath', Config::get('temp_dir', '/tmp')); |
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92 | foreach ($purifier_config as $k => $v) { |
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93 | $p_config->set($k, $v); |
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94 | } |
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95 | $purifier = new HTMLPurifier($p_config); |
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96 | } |
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97 | |||
98 | return $purifier->purify(stripslashes($value)); |
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99 | } |
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100 | } |
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101 |