inc/poche/Tools.class.php

   1 <?php
   2 /**
   3  * wallabag, self hostable application allowing you to not miss any content anymore
   4  *
   5  * @category   wallabag
   6  * @author     Nicolas Lœuillet <nicolas@loeuillet.org>
   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                     && $_SERVER["SERVER_PORT"] == '443') // HTTPS detection.
  45             || (isset($_SERVER["SERVER_PORT"]) //Custom HTTPS port detection
  46                     && $_SERVER["SERVER_PORT"] == SSL_PORT)
  47              || (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
  48                     && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');
  49
  50         $serverport = (!isset($_SERVER["SERVER_PORT"])
  51             || $_SERVER["SERVER_PORT"] == '80'
  52             || ($https && $_SERVER["SERVER_PORT"] == '443')
  53             || ($https && $_SERVER["SERVER_PORT"]==SSL_PORT) //Custom HTTPS port detection
  54             ? '' : ':' . $_SERVER["SERVER_PORT"]);
  55
  56         $scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);
  57
  58         if (!isset($_SERVER["HTTP_HOST"])) {
  59             return $scriptname;
  60         }
  61
  62         $host = (isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']));
  63
  64         return 'http' . ($https ? 's' : '') . '://'
  65             . $host . $serverport . $scriptname;
  66     }
  67
  68     public static function redirect($url = '')
  69     {
  70         if ($url === '') {
  71             $url = (empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']);
  72             if (isset($_POST['returnurl'])) {
  73                 $url = $_POST['returnurl'];
  74             }
  75         }
  76
  77         # prevent loop
  78         if (empty($url) || parse_url($url, PHP_URL_QUERY) === $_SERVER['QUERY_STRING']) {
  79             $url = Tools::getPocheUrl();
  80         }
  81
  82         if (substr($url, 0, 1) !== '?') {
  83             $ref = Tools::getPocheUrl();
  84             if (substr($url, 0, strlen($ref)) !== $ref) {
  85                 $url = $ref;
  86             }
  87         }
  88         self::logm('redirect to ' . $url);
  89         header('Location: '.$url);
  90         exit();
  91     }
  92
  93     public static function getTplFile($view)
  94     {
  95         $views = array(
  96             'install', 'import', 'export', 'config', 'tags',
  97             'edit-tags', 'view', 'login', 'error'
  98             );
  99
 100         if (in_array($view, $views)) {
 101             return $view . '.twig';
 102         }
 103
 104         return 'home.twig';
 105     }
 106
 107     public static function getFile($url)
 108     {
 109         $timeout = 15;
 110         $useragent = "Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0";
 111
 112         if (in_array ('curl', get_loaded_extensions())) {
 113             # Fetch feed from URL
 114             $curl = curl_init();
 115             curl_setopt($curl, CURLOPT_URL, $url);
 116             curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
 117             if (!ini_get('open_basedir') && !ini_get('safe_mode')) {
 118                 curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
 119             }
 120             curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
 121             curl_setopt($curl, CURLOPT_HEADER, false);
 122
 123             # for ssl, do not verified certificate
 124             curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
 125             curl_setopt($curl, CURLOPT_AUTOREFERER, TRUE );
 126
 127             # FeedBurner requires a proper USER-AGENT...
 128             curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
 129             curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate");
 130             curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
 131
 132             $data = curl_exec($curl);
 133             $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
 134             $httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
 135             curl_close($curl);
 136         } else {
 137             # create http context and add timeout and user-agent
 138             $context = stream_context_create(
 139                 array(
 140                     'http' => array(
 141                         'timeout' => $timeout,
 142                         'header' => "User-Agent: " . $useragent,
 143                         'follow_location' => true
 144                     ),
 145                     'ssl' => array(
 146                         'verify_peer' => false,
 147                         'allow_self_signed' => true
 148                     )
 149                 )
 150             );
 151
 152             # only download page lesser than 4MB
 153             $data = @file_get_contents($url, false, $context, -1, 4000000);
 154
 155             if (isset($http_response_header) and isset($http_response_header[0])) {
 156                 $httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== FALSE) or (strpos($http_response_header[0], '301 Moved Permanently') !== FALSE));
 157             }
 158         }
 159
 160         # if response is not empty and response is OK
 161         if (isset($data) and isset($httpcodeOK) and $httpcodeOK) {
 162
 163             # take charset of page and get it
 164             preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
 165
 166             # if meta tag is found
 167             if (!empty($meta[0])) {
 168                 preg_match('#charset="?(.*)"#si', $meta[0], $encoding);
 169                 # if charset is found set it otherwise, set it to utf-8
 170                 $html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8';
 171                 if (empty($encoding[1])) $encoding[1] = 'utf-8';
 172             } else {
 173                 $html_charset = 'utf-8';
 174                 $encoding[1] = '';
 175             }
 176
 177             # replace charset of url to charset of page
 178             $data = str_replace('charset=' . $encoding[1], 'charset=' . $html_charset, $data);
 179
 180             return $data;
 181         }
 182         else {
 183             return FALSE;
 184         }
 185     }
 186
 187     public static function renderJson($data)
 188     {
 189         header('Cache-Control: no-cache, must-revalidate');
 190         header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
 191         header('Content-type: application/json; charset=UTF-8');
 192         echo json_encode($data);
 193         exit();
 194     }
 195
 196     public static function logm($message)
 197     {
 198         if (DEBUG_POCHE && php_sapi_name() != 'cli') {
 199             $t = strval(date('Y/m/d_H:i:s')) . ' - ' . $_SERVER["REMOTE_ADDR"] . ' - ' . strval($message) . "\n";
 200             file_put_contents(CACHE . '/log.txt', $t, FILE_APPEND);
 201             error_log('DEBUG POCHE : ' . $message);
 202         }
 203     }
 204
 205     public static function encodeString($string)
 206     {
 207         return sha1($string . SALT);
 208     }
 209
 210     public static function checkVar($var, $default = '')
 211     {
 212         return ((isset ($_REQUEST["$var"])) ? htmlentities($_REQUEST["$var"]) : $default);
 213     }
 214
 215     public static function getDomain($url)
 216     {
 217       return parse_url($url, PHP_URL_HOST);
 218     }
 219
 220     public static function getReadingTime($text) {
 221         $word = str_word_count(strip_tags($text));
 222         $minutes = floor($word / 200);
 223         $seconds = floor($word % 200 / (200 / 60));
 224         $time = array('minutes' => $minutes, 'seconds' => $seconds);
 225
 226         return $minutes;
 227     }
 228
 229     public static function getDocLanguage($userlanguage) {
 230         $lang = explode('.', $userlanguage);
 231         return str_replace('_', '-', $lang[0]);
 232     }
 233
 234     public static function status($status_code)
 235     {
 236         if (strpos(php_sapi_name(), 'apache') !== false) {
 237
 238             header('HTTP/1.0 '.$status_code);
 239         }
 240         else {
 241
 242             header('Status: '.$status_code);
 243         }
 244     }
 245
 246     public static function download_db() {
 247         header('Content-Disposition: attachment; filename="poche.sqlite.gz"');
 248         self::status(200);
 249
 250         header('Content-Transfer-Encoding: binary');
 251         header('Content-Type: application/octet-stream');
 252         echo gzencode(file_get_contents(STORAGE_SQLITE));
 253
 254         exit;
 255     }
 256
 257     public static function getPageContent(Url $url)
 258     {
 259         // Saving and clearing context
 260         $REAL = array();
 261         foreach( $GLOBALS as $key => $value ) {
 262             if( $key != 'GLOBALS' && $key != '_SESSION' && $key != 'HTTP_SESSION_VARS' ) {
 263                 $GLOBALS[$key] = array();
 264                 $REAL[$key] = $value;
 265             }
 266         }
 267         // Saving and clearing session
 268         if ( isset($_SESSION) ) {
 269             $REAL_SESSION = array();
 270             foreach( $_SESSION as $key => $value ) {
 271                 $REAL_SESSION[$key] = $value;
 272                 unset($_SESSION[$key]);
 273             }
 274         }
 275
 276         // Running code in different context
 277         $scope = function() {
 278             extract( func_get_arg(1) );
 279             $_GET = $_REQUEST = array(
 280                         "url" => $url->getUrl(),
 281                         "max" => 5,
 282                         "links" => "preserve",
 283                         "exc" => "",
 284                         "format" => "json",
 285                         "submit" => "Create Feed"
 286             );
 287             ob_start();
 288             require func_get_arg(0);
 289             $json = ob_get_contents();
 290             ob_end_clean();
 291             return $json;
 292         };
 293         $json = $scope( "inc/3rdparty/makefulltextfeed.php", array("url" => $url) );
 294
 295         // Clearing and restoring context
 296         foreach( $GLOBALS as $key => $value ) {
 297             if( $key != "GLOBALS" && $key != "_SESSION" ) {
 298                 unset($GLOBALS[$key]);
 299             }
 300         }
 301         foreach( $REAL as $key => $value ) {
 302             $GLOBALS[$key] = $value;
 303         }
 304         // Clearing and restoring session
 305         if ( isset($REAL_SESSION) ) {
 306             foreach( $_SESSION as $key => $value ) {
 307                 unset($_SESSION[$key]);
 308             }
 309             foreach( $REAL_SESSION as $key => $value ) {
 310                 $_SESSION[$key] = $value;
 311             }
 312         }
 313
 314         return json_decode($json, true);
 315     }
 316
 317     /**
 318      * Returns whether we handle an AJAX (XMLHttpRequest) request.
 319      * @return boolean whether we handle an AJAX (XMLHttpRequest) request.
 320      */
 321     public static function isAjaxRequest()
 322     {
 323       return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest';
 324     }
 325
 326 }