inc/poche/Tools.class.php

   1 <?php
   2 /**
   3  * poche, a read it later open source system
   4  *
   5  * @category   poche
   6  * @author     Nicolas Lœuillet <support@inthepoche.com>
   7  * @copyright  2013
   8  * @license    http://www.wtfpl.net/ see COPYING file
   9  */
  10
  11 class Tools
  12 {
  13     public static function initPhp()
  14     {
  15         define('START_TIME', microtime(true));
  16
  17         if (phpversion() < 5) {
  18             die(_('Oops, it seems you don\'t have PHP 5.'));
  19         }
  20
  21         error_reporting(E_ALL);
  22
  23         function stripslashesDeep($value) {
  24             return is_array($value)
  25                 ? array_map('stripslashesDeep', $value)
  26                 : stripslashes($value);
  27         }
  28
  29         if (get_magic_quotes_gpc()) {
  30             $_POST = array_map('stripslashesDeep', $_POST);
  31             $_GET = array_map('stripslashesDeep', $_GET);
  32             $_COOKIE = array_map('stripslashesDeep', $_COOKIE);
  33         }
  34
  35         ob_start();
  36         register_shutdown_function('ob_end_flush');
  37     }
  38
  39     public static function getPocheUrl()
  40     {
  41         $https = (!empty($_SERVER['HTTPS'])
  42                     && (strtolower($_SERVER['HTTPS']) == 'on'))
  43             || (isset($_SERVER["SERVER_PORT"])
  44                     && $_SERVER["SERVER_PORT"] == '443'); // HTTPS detection.
  45         $serverport = (!isset($_SERVER["SERVER_PORT"])
  46             || $_SERVER["SERVER_PORT"] == '80'
  47             || ($https && $_SERVER["SERVER_PORT"] == '443')
  48             ? '' : ':' . $_SERVER["SERVER_PORT"]);
  49
  50         $scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);
  51
  52         if (!isset($_SERVER["SERVER_NAME"])) {
  53             return $scriptname;
  54         }
  55
  56         return 'http' . ($https ? 's' : '') . '://'
  57             . $_SERVER["SERVER_NAME"] . $serverport . $scriptname;
  58     }
  59
  60     public static function redirect($url = '')
  61     {
  62         if ($url === '') {
  63             $url = (empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']);
  64             if (isset($_POST['returnurl'])) {
  65                 $url = $_POST['returnurl'];
  66             }
  67         }
  68
  69         # prevent loop
  70         if (empty($url) || parse_url($url, PHP_URL_QUERY) === $_SERVER['QUERY_STRING']) {
  71             $url = Tools::getPocheUrl();
  72         }
  73
  74         if (substr($url, 0, 1) !== '?') {
  75             $ref = Tools::getPocheUrl();
  76             if (substr($url, 0, strlen($ref)) !== $ref) {
  77                 $url = $ref;
  78             }
  79         }
  80         self::logm('redirect to ' . $url);
  81         header('Location: '.$url);
  82         exit();
  83     }
  84
  85     public static function getTplFile($view)
  86     {
  87         $default_tpl = 'home.twig';
  88
  89         switch ($view) {
  90             case 'install':
  91                 $tpl_file = 'install.twig';
  92                 break;
  93             case 'import';
  94                 $tpl_file = 'import.twig';
  95                 break;
  96             case 'export':
  97                 $tpl_file = 'export.twig';
  98                 break;
  99             case 'config':
 100                 $tpl_file = 'config.twig';
 101                 break;
 102             case 'view':
 103                 $tpl_file = 'view.twig';
 104                 break;
 105
 106             case 'login':
 107                 $tpl_file = 'login.twig';
 108                 break;
 109
 110             case 'error':
 111                 $tpl_file = 'error.twig';
 112                 break;
 113
 114             default:
 115                 $tpl_file = $default_tpl;
 116                 break;
 117         }
 118
 119         return $tpl_file;
 120     }
 121
 122     public static function getFile($url)
 123     {
 124         $timeout = 15;
 125         $useragent = "Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0";
 126
 127         if (in_array ('curl', get_loaded_extensions())) {
 128             # Fetch feed from URL
 129             $curl = curl_init();
 130             curl_setopt($curl, CURLOPT_URL, $url);
 131             curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
 132             curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
 133             curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
 134             curl_setopt($curl, CURLOPT_HEADER, false);
 135
 136             # for ssl, do not verified certificate
 137             curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
 138             curl_setopt($curl, CURLOPT_AUTOREFERER, TRUE );
 139
 140             # FeedBurner requires a proper USER-AGENT...
 141             curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
 142             curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate");
 143             curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
 144
 145             $data = curl_exec($curl);
 146             $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
 147             $httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
 148             curl_close($curl);
 149         } else {
 150             # create http context and add timeout and user-agent
 151             $context = stream_context_create(
 152                 array(
 153                     'http' => array(
 154                         'timeout' => $timeout,
 155                         'header' => "User-Agent: " . $useragent,
 156                         'follow_location' => true
 157                     ),
 158                     'ssl' => array(
 159                         'verify_peer' => false,
 160                         'allow_self_signed' => true
 161                     )
 162                 )
 163             );
 164
 165             # only download page lesser than 4MB
 166             $data = @file_get_contents($url, false, $context, -1, 4000000);
 167
 168             if (isset($http_response_header) and isset($http_response_header[0])) {
 169                 $httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== FALSE) or (strpos($http_response_header[0], '301 Moved Permanently') !== FALSE));
 170             }
 171         }
 172
 173         # if response is not empty and response is OK
 174         if (isset($data) and isset($httpcodeOK) and $httpcodeOK) {
 175
 176             # take charset of page and get it
 177             preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
 178
 179             # if meta tag is found
 180             if (!empty($meta[0])) {
 181                 preg_match('#charset="?(.*)"#si', $meta[0], $encoding);
 182                 # if charset is found set it otherwise, set it to utf-8
 183                 $html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8';
 184                 if (empty($encoding[1])) $encoding[1] = 'utf-8';
 185             } else {
 186                 $html_charset = 'utf-8';
 187                 $encoding[1] = '';
 188             }
 189
 190             # replace charset of url to charset of page
 191             $data = str_replace('charset=' . $encoding[1], 'charset=' . $html_charset, $data);
 192
 193             return $data;
 194         }
 195         else {
 196             return FALSE;
 197         }
 198     }
 199
 200     public static function renderJson($data)
 201     {
 202         header('Cache-Control: no-cache, must-revalidate');
 203         header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
 204         header('Content-type: application/json; charset=UTF-8');
 205         echo json_encode($data);
 206         exit();
 207     }
 208
 209     public static function logm($message)
 210     {
 211         if (DEBUG_POCHE) {
 212             $t = strval(date('Y/m/d_H:i:s')) . ' - ' . $_SERVER["REMOTE_ADDR"] . ' - ' . strval($message) . "\n";
 213             file_put_contents(CACHE . '/log.txt', $t, FILE_APPEND);
 214             error_log('DEBUG POCHE : ' . $message);
 215         }
 216     }
 217
 218     public static function encodeString($string)
 219     {
 220         return sha1($string . SALT);
 221     }
 222
 223     public static function checkVar($var, $default = '')
 224     {
 225         return ((isset ($_REQUEST["$var"])) ? htmlentities($_REQUEST["$var"]) : $default);
 226     }
 227
 228     public static function getDomain($url)
 229     {
 230       return parse_url($url, PHP_URL_HOST);
 231     }
 232
 233     public static function getReadingTime($text) {
 234         $word = str_word_count(strip_tags($text));
 235         $minutes = floor($word / 200);
 236         $seconds = floor($word % 200 / (200 / 60));
 237         $time = array('minutes' => $minutes, 'seconds' => $seconds);
 238
 239         return $minutes;
 240     }
 241
 242     public static function getDocLanguage($userlanguage) {
 243         $lang = explode('.', $userlanguage);
 244         return str_replace('_', '-', $lang[0]);
 245     }
 246 }