index.php

   1 <?php
   2 /**
   3 <<<<<<< HEAD
   4  * Shaarli v0.8.7 - Shaare your links...
   5  *
   6  * The personal, minimalist, super-fast, database free, bookmarking service.
   7 =======
   8  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   9 >>>>>>> v0.9.7
  10  *
  11  * Friendly fork by the Shaarli community:
  12  *  - https://github.com/shaarli/Shaarli
  13  *
  14  * Original project by sebsauvage.net:
  15  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  16  *  - https://github.com/sebsauvage/Shaarli
  17  *
  18  * Licence: http://www.opensource.org/licenses/zlib-license.php
  19  *
  20  * Requires: PHP 5.5.x
  21  */
  22
  23 // Set 'UTC' as the default timezone if it is not defined in php.ini
  24 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  25 if (date_default_timezone_get() == '') {
  26     date_default_timezone_set('UTC');
  27 }
  28
  29 /*
  30  * PHP configuration
  31  */
  32
  33 // http://server.com/x/shaarli --> /shaarli/
  34 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  35
  36 // High execution time in case of problematic imports/exports.
  37 ini_set('max_input_time','60');
  38
  39 // Try to set max upload file size and read
  40 ini_set('memory_limit', '128M');
  41 ini_set('post_max_size', '16M');
  42 ini_set('upload_max_filesize', '16M');
  43
  44 // See all error except warnings
  45 error_reporting(E_ALL^E_WARNING);
  46 // See all errors (for debugging only)
  47 //error_reporting(-1);
  48
  49
  50 // 3rd-party libraries
  51 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  52     header('Content-Type: text/plain; charset=utf-8');
  53     echo "Error: missing Composer configuration\n\n"
  54         ."If you installed Shaarli through Git or using the development branch,\n"
  55         ."please refer to the installation documentation to install PHP"
  56         ." dependencies using Composer:\n"
  57         ."- https://shaarli.readthedocs.io/en/master/Server-requirements/\n"
  58         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  59     exit;
  60 }
  61 require_once 'inc/rain.tpl.class.php';
  62 require_once __DIR__ . '/vendor/autoload.php';
  63
  64 // Shaarli library
  65 require_once 'application/ApplicationUtils.php';
  66 require_once 'application/Cache.php';
  67 require_once 'application/CachedPage.php';
  68 require_once 'application/config/ConfigPlugin.php';
  69 require_once 'application/FeedBuilder.php';
  70 require_once 'application/FileUtils.php';
  71 require_once 'application/History.php';
  72 require_once 'application/HttpUtils.php';
  73 require_once 'application/LinkDB.php';
  74 require_once 'application/LinkFilter.php';
  75 require_once 'application/LinkUtils.php';
  76 require_once 'application/NetscapeBookmarkUtils.php';
  77 require_once 'application/PageBuilder.php';
  78 require_once 'application/TimeZone.php';
  79 require_once 'application/Url.php';
  80 require_once 'application/Utils.php';
  81 require_once 'application/PluginManager.php';
  82 require_once 'application/Router.php';
  83 require_once 'application/Updater.php';
  84 use \Shaarli\Languages;
  85 use \Shaarli\ThemeUtils;
  86 use \Shaarli\Config\ConfigManager;
  87 use \Shaarli\SessionManager;
  88
  89 // Ensure the PHP version is supported
  90 try {
  91     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  92 } catch(Exception $exc) {
  93     header('Content-Type: text/plain; charset=utf-8');
  94     echo $exc->getMessage();
  95     exit;
  96 }
  97
  98 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  99
 100 // Force cookie path (but do not change lifetime)
 101 $cookie = session_get_cookie_params();
 102 $cookiedir = '';
 103 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
 104     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
 105 }
 106 // Set default cookie expiration and path.
 107 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 108 // Set session parameters on server side.
 109 // If the user does not access any page within this time, his/her session is considered expired.
 110 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 111 // Use cookies to store session.
 112 ini_set('session.use_cookies', 1);
 113 // Force cookies for session (phpsessionID forbidden in URL).
 114 ini_set('session.use_only_cookies', 1);
 115 // Prevent PHP form using sessionID in URL if cookies are disabled.
 116 ini_set('session.use_trans_sid', false);
 117
 118 session_name('shaarli');
 119 // Start session if needed (Some server auto-start sessions).
 120 if (session_id() == '') {
 121     session_start();
 122 }
 123
 124 // Regenerate session ID if invalid or not defined in cookie.
 125 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 126     session_regenerate_id(true);
 127     $_COOKIE['shaarli'] = session_id();
 128 }
 129
 130 $conf = new ConfigManager();
 131 $sessionManager = new SessionManager($_SESSION, $conf);
 132
 133 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 134 if (! defined('LC_MESSAGES')) {
 135     define('LC_MESSAGES', LC_COLLATE);
 136 }
 137
 138 // Sniff browser language and set date format accordingly.
 139 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 140     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 141 }
 142
 143 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 144
 145 $conf->setEmpty('general.timezone', date_default_timezone_get());
 146 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 147 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 148 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 149
 150 $pluginManager = new PluginManager($conf);
 151 $pluginManager->load($conf->get('general.enabled_plugins'));
 152
 153 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 154
 155 ob_start();  // Output buffering for the page cache.
 156
 157 // Prevent caching on client side or proxy: (yes, it's ugly)
 158 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 159 header("Cache-Control: no-store, no-cache, must-revalidate");
 160 header("Cache-Control: post-check=0, pre-check=0", false);
 161 header("Pragma: no-cache");
 162
 163 if (! is_file($conf->getConfigFileExt())) {
 164     // Ensure Shaarli has proper access to its resources
 165     $errors = ApplicationUtils::checkResourcePermissions($conf);
 166
 167     if ($errors != array()) {
 168         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 169
 170         foreach ($errors as $error) {
 171             $message .= '<li>'.$error.'</li>';
 172         }
 173         $message .= '</ul>';
 174
 175         header('Content-Type: text/html; charset=utf-8');
 176         echo $message;
 177         exit;
 178     }
 179
 180     // Display the installation form if no existing config is found
 181     install($conf, $sessionManager);
 182 }
 183
 184 // a token depending of deployment salt, user password, and the current ip
 185 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 186
 187 /**
 188  * Checking session state (i.e. is the user still logged in)
 189  *
 190  * @param ConfigManager $conf The configuration manager.
 191  *
 192  * @return bool: true if the user is logged in, false otherwise.
 193  */
 194 function setup_login_state($conf)
 195 {
 196     if ($conf->get('security.open_shaarli')) {
 197         return true;
 198     }
 199     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 200     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 201     if (! $conf->exists('credentials.login')) {
 202         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 203         $loginFailure = true;
 204     }
 205     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 206         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 207         !$loginFailure)
 208     {
 209         fillSessionInfo($conf);
 210         $userIsLoggedIn = true;
 211     }
 212     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 213     if (empty($_SESSION['uid'])
 214         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 215         || time() >= $_SESSION['expires_on'])
 216     {
 217         logout();
 218         $userIsLoggedIn = false;
 219         $loginFailure = true;
 220     }
 221     if (!empty($_SESSION['longlastingsession'])) {
 222         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 223     }
 224     else {
 225         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 226     }
 227     if (!$loginFailure) {
 228         $userIsLoggedIn = true;
 229     }
 230
 231     return $userIsLoggedIn;
 232 }
 233 $userIsLoggedIn = setup_login_state($conf);
 234
 235 // ------------------------------------------------------------------------------------------
 236 // Session management
 237
 238 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 239 function allIPs()
 240 {
 241     $ip = $_SERVER['REMOTE_ADDR'];
 242     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 243     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 244     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 245     return $ip;
 246 }
 247
 248 /**
 249  * Load user session.
 250  *
 251  * @param ConfigManager $conf Configuration Manager instance.
 252  */
 253 function fillSessionInfo($conf)
 254 {
 255     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 256     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 257     $_SESSION['username']= $conf->get('credentials.login');
 258     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 259 }
 260
 261 /**
 262  * Check that user/password is correct.
 263  *
 264  * @param string        $login    Username
 265  * @param string        $password User password
 266  * @param ConfigManager $conf     Configuration Manager instance.
 267  *
 268  * @return bool: authentication successful or not.
 269  */
 270 function check_auth($login, $password, $conf)
 271 {
 272     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 273     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 274     {   // Login/password is correct.
 275         fillSessionInfo($conf);
 276         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 277         return true;
 278     }
 279     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 280     return false;
 281 }
 282
 283 // Returns true if the user is logged in.
 284 function isLoggedIn()
 285 {
 286     global $userIsLoggedIn;
 287     return $userIsLoggedIn;
 288 }
 289
 290 // Force logout.
 291 function logout() {
 292     if (isset($_SESSION)) {
 293         unset($_SESSION['uid']);
 294         unset($_SESSION['ip']);
 295         unset($_SESSION['username']);
 296         unset($_SESSION['privateonly']);
 297         unset($_SESSION['untaggedonly']);
 298     }
 299     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 300 }
 301
 302
 303 // ------------------------------------------------------------------------------------------
 304 // Brute force protection system
 305 // Several consecutive failed logins will ban the IP address for 30 minutes.
 306 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 307     // FIXME! globals
 308     file_put_contents(
 309         $conf->get('resource.ban_file', 'data/ipbans.php'),
 310         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 311     );
 312 }
 313 include $conf->get('resource.ban_file', 'data/ipbans.php');
 314 /**
 315  * Signal a failed login. Will ban the IP if too many failures:
 316  *
 317  * @param ConfigManager $conf Configuration Manager instance.
 318  */
 319 function ban_loginFailed($conf)
 320 {
 321     $ip = $_SERVER['REMOTE_ADDR'];
 322     $trusted = $conf->get('security.trusted_proxies', array());
 323     if (in_array($ip, $trusted)) {
 324         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 325         if (!$ip) {
 326             return;
 327         }
 328     }
 329     $gb = $GLOBALS['IPBANS'];
 330     if (! isset($gb['FAILURES'][$ip])) {
 331         $gb['FAILURES'][$ip]=0;
 332     }
 333     $gb['FAILURES'][$ip]++;
 334     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 335     {
 336         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 337         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 338     }
 339     $GLOBALS['IPBANS'] = $gb;
 340     file_put_contents(
 341         $conf->get('resource.ban_file', 'data/ipbans.php'),
 342         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 343     );
 344 }
 345
 346 /**
 347  * Signals a successful login. Resets failed login counter.
 348  *
 349  * @param ConfigManager $conf Configuration Manager instance.
 350  */
 351 function ban_loginOk($conf)
 352 {
 353     $ip = $_SERVER['REMOTE_ADDR'];
 354     $gb = $GLOBALS['IPBANS'];
 355     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 356     $GLOBALS['IPBANS'] = $gb;
 357     file_put_contents(
 358         $conf->get('resource.ban_file', 'data/ipbans.php'),
 359         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 360     );
 361 }
 362
 363 /**
 364  * Checks if the user CAN login. If 'true', the user can try to login.
 365  *
 366  * @param ConfigManager $conf Configuration Manager instance.
 367  *
 368  * @return bool: true if the user is allowed to login.
 369  */
 370 function ban_canLogin($conf)
 371 {
 372     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 373     if (isset($gb['BANS'][$ip]))
 374     {
 375         // User is banned. Check if the ban has expired:
 376         if ($gb['BANS'][$ip]<=time())
 377         {   // Ban expired, user can try to login again.
 378             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 379             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 380             file_put_contents(
 381                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 382                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 383             );
 384             return true; // Ban has expired, user can login.
 385         }
 386         return false; // User is banned.
 387     }
 388     return true; // User is not banned.
 389 }
 390
 391 // ------------------------------------------------------------------------------------------
 392 // Process login form: Check if login/password is correct.
 393 if (isset($_POST['login']))
 394 {
 395     if (!ban_canLogin($conf)) die(t('I said: NO. You are banned for the moment. Go away.'));
 396     if (isset($_POST['password'])
 397         && $sessionManager->checkToken($_POST['token'])
 398         && (check_auth($_POST['login'], $_POST['password'], $conf))
 399     ) {   // Login/password is OK.
 400         ban_loginOk($conf);
 401         // If user wants to keep the session cookie even after the browser closes:
 402         if (!empty($_POST['longlastingsession']))
 403         {
 404             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 405             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 406             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 407             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 408
 409             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 410             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 411             // Note: Never forget the trailing slash on the cookie path!
 412             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 413         }
 414         else // Standard session expiration (=when browser closes)
 415         {
 416             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 417             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 418             session_regenerate_id(true);
 419         }
 420
 421         // Optional redirect after login:
 422         if (isset($_GET['post'])) {
 423             $uri = '?post='. urlencode($_GET['post']);
 424             foreach (array('description', 'source', 'title', 'tags') as $param) {
 425                 if (!empty($_GET[$param])) {
 426                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 427                 }
 428             }
 429             header('Location: '. $uri);
 430             exit;
 431         }
 432
 433         if (isset($_GET['edit_link'])) {
 434             header('Location: ?edit_link='. escape($_GET['edit_link']));
 435             exit;
 436         }
 437
 438         if (isset($_POST['returnurl'])) {
 439             // Prevent loops over login screen.
 440             if (strpos($_POST['returnurl'], 'do=login') === false) {
 441                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 442                 exit;
 443             }
 444         }
 445         header('Location: ?'); exit;
 446     }
 447     else
 448     {
 449         ban_loginFailed($conf);
 450         $redir = '&username='. urlencode($_POST['login']);
 451         if (isset($_GET['post'])) {
 452             $redir .= '&post=' . urlencode($_GET['post']);
 453             foreach (array('description', 'source', 'title', 'tags') as $param) {
 454                 if (!empty($_GET[$param])) {
 455                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 456                 }
 457             }
 458         }
 459         // Redirect to login screen.
 460         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 461         exit;
 462     }
 463 }
 464
 465 // ------------------------------------------------------------------------------------------
 466 // Token management for XSRF protection
 467 // Token should be used in any form which acts on data (create,update,delete,import...).
 468 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 469
 470 /**
 471  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 472  * Gives the last 7 days (which have links).
 473  * This RSS feed cannot be filtered.
 474  *
 475  * @param ConfigManager $conf Configuration Manager instance.
 476  */
 477 function showDailyRSS($conf) {
 478     // Cache system
 479     $query = $_SERVER['QUERY_STRING'];
 480     $cache = new CachedPage(
 481         $conf->get('config.PAGE_CACHE'),
 482         page_url($_SERVER),
 483         startsWith($query,'do=dailyrss') && !isLoggedIn()
 484     );
 485     $cached = $cache->cachedVersion();
 486     if (!empty($cached)) {
 487         echo $cached;
 488         exit;
 489     }
 490
 491     // If cached was not found (or not usable), then read the database and build the response:
 492     // Read links from database (and filter private links if used it not logged in).
 493     $LINKSDB = new LinkDB(
 494         $conf->get('resource.datastore'),
 495         isLoggedIn(),
 496         $conf->get('privacy.hide_public_links'),
 497         $conf->get('redirector.url'),
 498         $conf->get('redirector.encode_url')
 499     );
 500
 501     /* Some Shaarlies may have very few links, so we need to look
 502        back in time until we have enough days ($nb_of_days).
 503     */
 504     $nb_of_days = 7; // We take 7 days.
 505     $today = date('Ymd');
 506     $days = array();
 507
 508     foreach ($LINKSDB as $link) {
 509         $day = $link['created']->format('Ymd'); // Extract day (without time)
 510         if (strcmp($day, $today) < 0) {
 511             if (empty($days[$day])) {
 512                 $days[$day] = array();
 513             }
 514             $days[$day][] = $link;
 515         }
 516
 517         if (count($days) > $nb_of_days) {
 518             break; // Have we collected enough days?
 519         }
 520     }
 521
 522     // Build the RSS feed.
 523     header('Content-Type: application/rss+xml; charset=utf-8');
 524     $pageaddr = escape(index_url($_SERVER));
 525     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 526     echo '<channel>';
 527     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 528     echo '<link>'. $pageaddr .'</link>';
 529     echo '<description>Daily shared links</description>';
 530     echo '<language>en-en</language>';
 531     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 532
 533     // For each day.
 534     foreach ($days as $day => $links) {
 535         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 536         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 537
 538         // We pre-format some fields for proper output.
 539         foreach ($links as &$link) {
 540             $link['formatedDescription'] = format_description(
 541                 $link['description'],
 542                 $conf->get('redirector.url'),
 543                 $conf->get('redirector.encode_url')
 544             );
 545             $link['thumbnail'] = thumbnail($conf, $link['url']);
 546             $link['timestamp'] = $link['created']->getTimestamp();
 547             if (startsWith($link['url'], '?')) {
 548                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 549             }
 550         }
 551
 552         // Then build the HTML for this day:
 553         $tpl = new RainTPL;
 554         $tpl->assign('title', $conf->get('general.title'));
 555         $tpl->assign('daydate', $dayDate->getTimestamp());
 556         $tpl->assign('absurl', $absurl);
 557         $tpl->assign('links', $links);
 558         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 559         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 560         $html = $tpl->draw('dailyrss', true);
 561
 562         echo $html . PHP_EOL;
 563     }
 564     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 565
 566     $cache->cache(ob_get_contents());
 567     ob_end_flush();
 568     exit;
 569 }
 570
 571 /**
 572  * Show the 'Daily' page.
 573  *
 574  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 575  * @param LinkDB        $LINKSDB       LinkDB instance.
 576  * @param ConfigManager $conf          Configuration Manager instance.
 577  * @param PluginManager $pluginManager Plugin Manager instane.
 578  */
 579 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 580 {
 581     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 582     if (isset($_GET['day'])) {
 583       $day = $_GET['day'];
 584     }
 585
 586     $days = $LINKSDB->days();
 587     $i = array_search($day, $days);
 588     if ($i === false && count($days)) {
 589         // no links for day, but at least one day with links
 590         $i = count($days) - 1;
 591         $day = $days[$i];
 592     }
 593     $previousday = '';
 594     $nextday = '';
 595
 596     if ($i !== false) {
 597         if ($i >= 1) {
 598              $previousday=$days[$i - 1];
 599         }
 600         if ($i < count($days) - 1) {
 601           $nextday = $days[$i + 1];
 602         }
 603     }
 604     try {
 605         $linksToDisplay = $LINKSDB->filterDay($day);
 606     } catch (Exception $exc) {
 607         error_log($exc);
 608         $linksToDisplay = array();
 609     }
 610
 611     // We pre-format some fields for proper output.
 612     foreach($linksToDisplay as $key => $link) {
 613         $taglist = explode(' ',$link['tags']);
 614         uasort($taglist, 'strcasecmp');
 615         $linksToDisplay[$key]['taglist']=$taglist;
 616         $linksToDisplay[$key]['formatedDescription'] = format_description(
 617             $link['description'],
 618             $conf->get('redirector.url'),
 619             $conf->get('redirector.encode_url')
 620         );
 621         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 622         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 623     }
 624
 625     /* We need to spread the articles on 3 columns.
 626        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 627        so I manually spread entries with a simple method: I roughly evaluate the
 628        height of a div according to title and description length.
 629     */
 630     $columns = array(array(), array(), array()); // Entries to display, for each column.
 631     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 632     foreach($linksToDisplay as $key => $link) {
 633         // Roughly estimate length of entry (by counting characters)
 634         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 635         // Description: 836 characters gives roughly 342 pixel height.
 636         // This is not perfect, but it's usually OK.
 637         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 638         if ($link['thumbnail']) {
 639           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 640         }
 641         // Then put in column which is the less filled:
 642         $smallest = min($fill); // find smallest value in array.
 643         $index = array_search($smallest, $fill); // find index of this smallest value.
 644         array_push($columns[$index], $link); // Put entry in this column.
 645         $fill[$index] += $length;
 646     }
 647
 648     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 649     $data = array(
 650         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 651         'linksToDisplay' => $linksToDisplay,
 652         'cols' => $columns,
 653         'day' => $dayDate->getTimestamp(),
 654         'dayDate' => $dayDate,
 655         'previousday' => $previousday,
 656         'nextday' => $nextday,
 657     );
 658
 659     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 660
 661     foreach ($data as $key => $value) {
 662         $pageBuilder->assign($key, $value);
 663     }
 664
 665     $pageBuilder->renderPage('daily');
 666     exit;
 667 }
 668
 669 /**
 670  * Renders the linklist
 671  *
 672  * @param pageBuilder   $PAGE    pageBuilder instance.
 673  * @param LinkDB        $LINKSDB LinkDB instance.
 674  * @param ConfigManager $conf    Configuration Manager instance.
 675  * @param PluginManager $pluginManager Plugin Manager instance.
 676  */
 677 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 678     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 679     $PAGE->renderPage('linklist');
 680 }
 681
 682 /**
 683  * Render HTML page (according to URL parameters and user rights)
 684  *
 685  * @param ConfigManager  $conf           Configuration Manager instance.
 686  * @param PluginManager  $pluginManager  Plugin Manager instance,
 687  * @param LinkDB         $LINKSDB
 688  * @param History        $history        instance
 689  * @param SessionManager $sessionManager SessionManager instance
 690  */
 691 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager)
 692 {
 693     $updater = new Updater(
 694         read_updates_file($conf->get('resource.updates')),
 695         $LINKSDB,
 696         $conf,
 697         isLoggedIn()
 698     );
 699     try {
 700         $newUpdates = $updater->update();
 701         if (! empty($newUpdates)) {
 702             write_updates_file(
 703                 $conf->get('resource.updates'),
 704                 $updater->getDoneUpdates()
 705             );
 706         }
 707     }
 708     catch(Exception $e) {
 709         die($e->getMessage());
 710     }
 711
 712     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 713     $PAGE->assign('linkcount', count($LINKSDB));
 714     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 715     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 716
 717     // Determine which page will be rendered.
 718     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 719     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 720
 721     if (
 722         // if the user isn't logged in
 723         !isLoggedIn() &&
 724         // and Shaarli doesn't have public content...
 725         $conf->get('privacy.hide_public_links') &&
 726         // and is configured to enforce the login
 727         $conf->get('privacy.force_login') &&
 728         // and the current page isn't already the login page
 729         $targetPage !== Router::$PAGE_LOGIN &&
 730         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 731         $targetPage !== Router::$PAGE_FEED_ATOM &&
 732         $targetPage !== Router::$PAGE_FEED_RSS
 733     ) {
 734         // force current page to be the login page
 735         $targetPage = Router::$PAGE_LOGIN;
 736     }
 737
 738     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 739     // Then assign generated data to RainTPL.
 740     $common_hooks = array(
 741         'includes',
 742         'header',
 743         'footer',
 744     );
 745
 746     foreach($common_hooks as $name) {
 747         $plugin_data = array();
 748         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 749             array(
 750                 'target' => $targetPage,
 751                 'loggedin' => isLoggedIn()
 752             )
 753         );
 754         $PAGE->assign('plugins_' . $name, $plugin_data);
 755     }
 756
 757     // -------- Display login form.
 758     if ($targetPage == Router::$PAGE_LOGIN)
 759     {
 760         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 761         if (isset($_GET['username'])) {
 762             $PAGE->assign('username', escape($_GET['username']));
 763         }
 764         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 765         // add default state of the 'remember me' checkbox
 766         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 767         $PAGE->renderPage('loginform');
 768         exit;
 769     }
 770     // -------- User wants to logout.
 771     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 772     {
 773         invalidateCaches($conf->get('resource.page_cache'));
 774         logout();
 775         header('Location: ?');
 776         exit;
 777     }
 778
 779     // -------- Picture wall
 780     if ($targetPage == Router::$PAGE_PICWALL)
 781     {
 782         // Optionally filter the results:
 783         $links = $LINKSDB->filterSearch($_GET);
 784         $linksToDisplay = array();
 785
 786         // Get only links which have a thumbnail.
 787         foreach($links as $link)
 788         {
 789             $permalink='?'.$link['shorturl'];
 790             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 791             if ($thumb!='') // Only output links which have a thumbnail.
 792             {
 793                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 794                 $linksToDisplay[]=$link; // Add to array.
 795             }
 796         }
 797
 798         $data = array(
 799             'linksToDisplay' => $linksToDisplay,
 800         );
 801         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 802
 803         foreach ($data as $key => $value) {
 804             $PAGE->assign($key, $value);
 805         }
 806
 807         $PAGE->renderPage('picwall');
 808         exit;
 809     }
 810
 811     // -------- Tag cloud
 812     if ($targetPage == Router::$PAGE_TAGCLOUD)
 813     {
 814         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 815         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 816         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 817
 818         // We sort tags alphabetically, then choose a font size according to count.
 819         // First, find max value.
 820         $maxcount = 0;
 821         foreach ($tags as $value) {
 822             $maxcount = max($maxcount, $value);
 823         }
 824
 825         alphabetical_sort($tags, false, true);
 826
 827         $tagList = array();
 828         foreach($tags as $key => $value) {
 829             if (in_array($key, $filteringTags)) {
 830                 continue;
 831             }
 832             // Tag font size scaling:
 833             //   default 15 and 30 logarithm bases affect scaling,
 834             //   22 and 6 are arbitrary font sizes for max and min sizes.
 835             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 836             $tagList[$key] = array(
 837                 'count' => $value,
 838                 'size' => number_format($size, 2, '.', ''),
 839             );
 840         }
 841
 842         $data = array(
 843             'search_tags' => implode(' ', escape($filteringTags)),
 844             'tags' => $tagList,
 845         );
 846         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 847
 848         foreach ($data as $key => $value) {
 849             $PAGE->assign($key, $value);
 850         }
 851
 852         $PAGE->renderPage('tag.cloud');
 853         exit;
 854     }
 855
 856     // -------- Tag list
 857     if ($targetPage == Router::$PAGE_TAGLIST)
 858     {
 859         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 860         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 861         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 862         foreach ($filteringTags as $tag) {
 863             if (array_key_exists($tag, $tags)) {
 864                 unset($tags[$tag]);
 865             }
 866         }
 867
 868         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 869             alphabetical_sort($tags, false, true);
 870         }
 871
 872         $data = [
 873             'search_tags' => implode(' ', escape($filteringTags)),
 874             'tags' => $tags,
 875         ];
 876         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 877
 878         foreach ($data as $key => $value) {
 879             $PAGE->assign($key, $value);
 880         }
 881
 882         $PAGE->renderPage('tag.list');
 883         exit;
 884     }
 885
 886     // Daily page.
 887     if ($targetPage == Router::$PAGE_DAILY) {
 888         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 889     }
 890
 891     // ATOM and RSS feed.
 892     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 893         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 894         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 895
 896         // Cache system
 897         $query = $_SERVER['QUERY_STRING'];
 898         $cache = new CachedPage(
 899             $conf->get('resource.page_cache'),
 900             page_url($_SERVER),
 901             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 902         );
 903         $cached = $cache->cachedVersion();
 904         if (!empty($cached)) {
 905             echo $cached;
 906             exit;
 907         }
 908
 909         // Generate data.
 910         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 911         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 912         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 913         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 914         $data = $feedGenerator->buildData();
 915
 916         // Process plugin hook.
 917         $pluginManager->executeHooks('render_feed', $data, array(
 918             'loggedin' => isLoggedIn(),
 919             'target' => $targetPage,
 920         ));
 921
 922         // Render the template.
 923         $PAGE->assignAll($data);
 924         $PAGE->renderPage('feed.'. $feedType);
 925         $cache->cache(ob_get_contents());
 926         ob_end_flush();
 927         exit;
 928     }
 929
 930     // Display opensearch plugin (XML)
 931     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 932         header('Content-Type: application/xml; charset=utf-8');
 933         $PAGE->assign('serverurl', index_url($_SERVER));
 934         $PAGE->renderPage('opensearch');
 935         exit;
 936     }
 937
 938     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 939     if (isset($_GET['addtag']))
 940     {
 941         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 942         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 943         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 944
 945         // Prevent redirection loop
 946         if (isset($params['addtag'])) {
 947             unset($params['addtag']);
 948         }
 949
 950         // Check if this tag is already in the search query and ignore it if it is.
 951         // Each tag is always separated by a space
 952         if (isset($params['searchtags'])) {
 953             $current_tags = explode(' ', $params['searchtags']);
 954         } else {
 955             $current_tags = array();
 956         }
 957         $addtag = true;
 958         foreach ($current_tags as $value) {
 959             if ($value === $_GET['addtag']) {
 960                 $addtag = false;
 961                 break;
 962             }
 963         }
 964         // Append the tag if necessary
 965         if (empty($params['searchtags'])) {
 966             $params['searchtags'] = trim($_GET['addtag']);
 967         }
 968         else if ($addtag) {
 969             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 970         }
 971
 972         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 973         header('Location: ?'.http_build_query($params));
 974         exit;
 975     }
 976
 977     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 978     if (isset($_GET['removetag'])) {
 979         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 980         if (empty($_SERVER['HTTP_REFERER'])) {
 981             header('Location: ?');
 982             exit;
 983         }
 984
 985         // In case browser does not send HTTP_REFERER
 986         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 987
 988         // Prevent redirection loop
 989         if (isset($params['removetag'])) {
 990             unset($params['removetag']);
 991         }
 992
 993         if (isset($params['searchtags'])) {
 994             $tags = explode(' ', $params['searchtags']);
 995             // Remove value from array $tags.
 996             $tags = array_diff($tags, array($_GET['removetag']));
 997             $params['searchtags'] = implode(' ',$tags);
 998
 999             if (empty($params['searchtags'])) {
1000                 unset($params['searchtags']);
1001             }
1002
1003             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1004         }
1005         header('Location: ?'.http_build_query($params));
1006         exit;
1007     }
1008
1009     // -------- User wants to change the number of links per page (linksperpage=...)
1010     if (isset($_GET['linksperpage'])) {
1011         if (is_numeric($_GET['linksperpage'])) {
1012             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1013         }
1014
1015         if (! empty($_SERVER['HTTP_REFERER'])) {
1016             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1017         } else {
1018             $location = '?';
1019         }
1020         header('Location: '. $location);
1021         exit;
1022     }
1023
1024     // -------- User wants to see only private links (toggle)
1025     if (isset($_GET['privateonly'])) {
1026         if (empty($_SESSION['privateonly'])) {
1027             $_SESSION['privateonly'] = 1; // See only private links
1028         } else {
1029             unset($_SESSION['privateonly']); // See all links
1030         }
1031
1032         if (! empty($_SERVER['HTTP_REFERER'])) {
1033             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1034         } else {
1035             $location = '?';
1036         }
1037         header('Location: '. $location);
1038         exit;
1039     }
1040
1041     // -------- User wants to see only untagged links (toggle)
1042     if (isset($_GET['untaggedonly'])) {
1043         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1044
1045         if (! empty($_SERVER['HTTP_REFERER'])) {
1046             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1047         } else {
1048             $location = '?';
1049         }
1050         header('Location: '. $location);
1051         exit;
1052     }
1053
1054     // -------- Handle other actions allowed for non-logged in users:
1055     if (!isLoggedIn())
1056     {
1057         // User tries to post new link but is not logged in:
1058         // Show login screen, then redirect to ?post=...
1059         if (isset($_GET['post']))
1060         {
1061             header( // Redirect to login page, then back to post link.
1062                 'Location: ?do=login&post='.urlencode($_GET['post']).
1063                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1064                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1065                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1066                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1067             );
1068             exit;
1069         }
1070
1071         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1072         if (isset($_GET['edit_link'])) {
1073             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1074             exit;
1075         }
1076
1077         exit; // Never remove this one! All operations below are reserved for logged in user.
1078     }
1079
1080     // -------- All other functions are reserved for the registered user:
1081
1082     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1083     if ($targetPage == Router::$PAGE_TOOLS)
1084     {
1085         $data = [
1086             'pageabsaddr' => index_url($_SERVER),
1087             'sslenabled' => is_https($_SERVER),
1088         ];
1089         $pluginManager->executeHooks('render_tools', $data);
1090
1091         foreach ($data as $key => $value) {
1092             $PAGE->assign($key, $value);
1093         }
1094
1095         $PAGE->renderPage('tools');
1096         exit;
1097     }
1098
1099     // -------- User wants to change his/her password.
1100     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1101     {
1102         if ($conf->get('security.open_shaarli')) {
1103             die(t('You are not supposed to change a password on an Open Shaarli.'));
1104         }
1105
1106         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1107         {
1108             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1109
1110             // Make sure old password is correct.
1111             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1112             if ($oldhash!= $conf->get('credentials.hash')) {
1113                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1114                 exit;
1115             }
1116             // Save new password
1117             // Salt renders rainbow-tables attacks useless.
1118             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1119             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1120             try {
1121                 $conf->write(isLoggedIn());
1122             }
1123             catch(Exception $e) {
1124                 error_log(
1125                     'ERROR while writing config file after changing password.' . PHP_EOL .
1126                     $e->getMessage()
1127                 );
1128
1129                 // TODO: do not handle exceptions/errors in JS.
1130                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1131                 exit;
1132             }
1133             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1134             exit;
1135         }
1136         else // show the change password form.
1137         {
1138             $PAGE->renderPage('changepassword');
1139             exit;
1140         }
1141     }
1142
1143     // -------- User wants to change configuration
1144     if ($targetPage == Router::$PAGE_CONFIGURE)
1145     {
1146         if (!empty($_POST['title']) )
1147         {
1148             if (!$sessionManager->checkToken($_POST['token'])) {
1149                 die(t('Wrong token.')); // Go away!
1150             }
1151             $tz = 'UTC';
1152             if (!empty($_POST['continent']) && !empty($_POST['city'])
1153                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1154             ) {
1155                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1156             }
1157             $conf->set('general.timezone', $tz);
1158             $conf->set('general.title', escape($_POST['title']));
1159             $conf->set('general.header_link', escape($_POST['titleLink']));
1160             $conf->set('resource.theme', escape($_POST['theme']));
1161             $conf->set('redirector.url', escape($_POST['redirector']));
1162             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1163             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1164             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1165             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1166             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1167             $conf->set('api.enabled', !empty($_POST['enableApi']));
1168             $conf->set('api.secret', escape($_POST['apiSecret']));
1169             $conf->set('translation.language', escape($_POST['language']));
1170
1171             try {
1172                 $conf->write(isLoggedIn());
1173                 $history->updateSettings();
1174                 invalidateCaches($conf->get('resource.page_cache'));
1175             }
1176             catch(Exception $e) {
1177                 error_log(
1178                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1179                     $e->getMessage()
1180                 );
1181
1182                 // TODO: do not handle exceptions/errors in JS.
1183                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1184                 exit;
1185             }
1186             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1187             exit;
1188         }
1189         else // Show the configuration form.
1190         {
1191             $PAGE->assign('title', $conf->get('general.title'));
1192             $PAGE->assign('theme', $conf->get('resource.theme'));
1193             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1194             $PAGE->assign('redirector', $conf->get('redirector.url'));
1195             list($continents, $cities) = generateTimeZoneData(
1196                 timezone_identifiers_list(),
1197                 $conf->get('general.timezone')
1198             );
1199             $PAGE->assign('continents', $continents);
1200             $PAGE->assign('cities', $cities);
1201             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1202             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1203             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1204             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1205             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1206             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1207             $PAGE->assign('api_secret', $conf->get('api.secret'));
1208             $PAGE->assign('languages', Languages::getAvailableLanguages());
1209             $PAGE->assign('language', $conf->get('translation.language'));
1210             $PAGE->renderPage('configure');
1211             exit;
1212         }
1213     }
1214
1215     // -------- User wants to rename a tag or delete it
1216     if ($targetPage == Router::$PAGE_CHANGETAG)
1217     {
1218         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1219             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1220             $PAGE->renderPage('changetag');
1221             exit;
1222         }
1223
1224         if (!$sessionManager->checkToken($_POST['token'])) {
1225             die(t('Wrong token.'));
1226         }
1227
1228         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1229         $LINKSDB->save($conf->get('resource.page_cache'));
1230         foreach ($alteredLinks as $link) {
1231             $history->updateLink($link);
1232         }
1233         $delete = empty($_POST['totag']);
1234         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1235         $count = count($alteredLinks);
1236         $alert = $delete
1237             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1238             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1239         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1240         exit;
1241     }
1242
1243     // -------- User wants to add a link without using the bookmarklet: Show form.
1244     if ($targetPage == Router::$PAGE_ADDLINK)
1245     {
1246         $PAGE->renderPage('addlink');
1247         exit;
1248     }
1249
1250     // -------- User clicked the "Save" button when editing a link: Save link to database.
1251     if (isset($_POST['save_edit']))
1252     {
1253         // Go away!
1254         if (! $sessionManager->checkToken($_POST['token'])) {
1255             die(t('Wrong token.'));
1256         }
1257
1258         // lf_id should only be present if the link exists.
1259         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1260         // Linkdate is kept here to:
1261         //   - use the same permalink for notes as they're displayed when creating them
1262         //   - let users hack creation date of their posts
1263         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1264         $linkdate = escape($_POST['lf_linkdate']);
1265         if (isset($LINKSDB[$id])) {
1266             // Edit
1267             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1268             $updated = new DateTime();
1269             $shortUrl = $LINKSDB[$id]['shorturl'];
1270             $new = false;
1271         } else {
1272             // New link
1273             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1274             $updated = null;
1275             $shortUrl = link_small_hash($created, $id);
1276             $new = true;
1277         }
1278
1279         // Remove multiple spaces.
1280         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1281         // Remove first '-' char in tags.
1282         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1283         // Remove duplicates.
1284         $tags = implode(' ', array_unique(explode(' ', $tags)));
1285
1286         if (empty(trim($_POST['lf_url']))) {
1287             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1288         }
1289         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1290
1291         $link = array(
1292             'id' => $id,
1293             'title' => trim($_POST['lf_title']),
1294             'url' => $url,
1295             'description' => $_POST['lf_description'],
1296             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1297             'created' => $created,
1298             'updated' => $updated,
1299             'tags' => str_replace(',', ' ', $tags),
1300             'shorturl' => $shortUrl,
1301         );
1302
1303         // If title is empty, use the URL as title.
1304         if ($link['title'] == '') {
1305             $link['title'] = $link['url'];
1306         }
1307
1308         $pluginManager->executeHooks('save_link', $link);
1309
1310         $LINKSDB[$id] = $link;
1311         $LINKSDB->save($conf->get('resource.page_cache'));
1312         if ($new) {
1313             $history->addLink($link);
1314         } else {
1315             $history->updateLink($link);
1316         }
1317
1318         // If we are called from the bookmarklet, we must close the popup:
1319         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1320             echo '<script>self.close();</script>';
1321             exit;
1322         }
1323
1324         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1325         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1326         // Scroll to the link which has been edited.
1327         $location .= '#' . $link['shorturl'];
1328         // After saving the link, redirect to the page the user was on.
1329         header('Location: '. $location);
1330         exit;
1331     }
1332
1333     // -------- User clicked the "Cancel" button when editing a link.
1334     if (isset($_POST['cancel_edit']))
1335     {
1336         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1337         if (! isset($LINKSDB[$id])) {
1338             header('Location: ?');
1339         }
1340         // If we are called from the bookmarklet, we must close the popup:
1341         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1342         $link = $LINKSDB[$id];
1343         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1344         // Scroll to the link which has been edited.
1345         $returnurl .= '#'. $link['shorturl'];
1346         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1347         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1348         exit;
1349     }
1350
1351     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1352     if ($targetPage == Router::$PAGE_DELETELINK)
1353     {
1354         if (! $sessionManager->checkToken($_GET['token'])) {
1355             die(t('Wrong token.'));
1356         }
1357
1358         $ids = trim($_GET['lf_linkdate']);
1359         if (strpos($ids, ' ') !== false) {
1360             // multiple, space-separated ids provided
1361             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1362         } else {
1363             // only a single id provided
1364             $ids = [$ids];
1365         }
1366         // assert at least one id is given
1367         if(!count($ids)){
1368             die('no id provided');
1369         }
1370         foreach ($ids as $id) {
1371             $id = (int) escape($id);
1372             $link = $LINKSDB[$id];
1373             $pluginManager->executeHooks('delete_link', $link);
1374             unset($LINKSDB[$id]);
1375         }
1376         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1377         $history->deleteLink($link);
1378
1379         // If we are called from the bookmarklet, we must close the popup:
1380         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1381
1382         $location = '?';
1383         if (isset($_SERVER['HTTP_REFERER'])) {
1384             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1385             $location = generateLocation(
1386                     $_SERVER['HTTP_REFERER'],
1387                     $_SERVER['HTTP_HOST'],
1388                     ['delete_link', 'edit_link', $link['shorturl']]
1389             );
1390         }
1391
1392         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1393         exit;
1394     }
1395
1396     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1397     if (isset($_GET['edit_link']))
1398     {
1399         $id = (int) escape($_GET['edit_link']);
1400         $link = $LINKSDB[$id];  // Read database
1401         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1402         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1403         $data = array(
1404             'link' => $link,
1405             'link_is_new' => false,
1406             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1407             'tags' => $LINKSDB->linksCountPerTag(),
1408         );
1409         $pluginManager->executeHooks('render_editlink', $data);
1410
1411         foreach ($data as $key => $value) {
1412             $PAGE->assign($key, $value);
1413         }
1414
1415         $PAGE->renderPage('editlink');
1416         exit;
1417     }
1418
1419     // -------- User want to post a new link: Display link edit form.
1420     if (isset($_GET['post'])) {
1421         $url = cleanup_url($_GET['post']);
1422
1423         $link_is_new = false;
1424         // Check if URL is not already in database (in this case, we will edit the existing link)
1425         $link = $LINKSDB->getLinkFromUrl($url);
1426         if (! $link)
1427         {
1428             $link_is_new = true;
1429             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1430             // Get title if it was provided in URL (by the bookmarklet).
1431             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1432             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1433             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1434             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1435             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1436             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1437             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1438                 // Short timeout to keep the application responsive
1439                 // The callback will fill $charset and $title with data from the downloaded page.
1440                 get_http_response($url, 25, 4194304, get_curl_download_callback($charset, $title));
1441                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1442                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1443                 }
1444             }
1445
1446             if ($url == '') {
1447                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1448                 $title = $conf->get('general.default_note_title', t('Note: '));
1449             }
1450             $url = escape($url);
1451             $title = escape($title);
1452
1453             $link = array(
1454                 'linkdate' => $linkdate,
1455                 'title' => $title,
1456                 'url' => $url,
1457                 'description' => $description,
1458                 'tags' => $tags,
1459                 'private' => $private,
1460             );
1461         } else {
1462             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1463         }
1464
1465         $data = array(
1466             'link' => $link,
1467             'link_is_new' => $link_is_new,
1468             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1469             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1470             'tags' => $LINKSDB->linksCountPerTag(),
1471             'default_private_links' => $conf->get('privacy.default_private_links', false),
1472         );
1473         $pluginManager->executeHooks('render_editlink', $data);
1474
1475         foreach ($data as $key => $value) {
1476             $PAGE->assign($key, $value);
1477         }
1478
1479         $PAGE->renderPage('editlink');
1480         exit;
1481     }
1482
1483     if ($targetPage == Router::$PAGE_EXPORT) {
1484         // Export links as a Netscape Bookmarks file
1485
1486         if (empty($_GET['selection'])) {
1487             $PAGE->renderPage('export');
1488             exit;
1489         }
1490
1491         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1492         $selection = $_GET['selection'];
1493         if (isset($_GET['prepend_note_url'])) {
1494             $prependNoteUrl = $_GET['prepend_note_url'];
1495         } else {
1496             $prependNoteUrl = false;
1497         }
1498
1499         try {
1500             $PAGE->assign(
1501                 'links',
1502                 NetscapeBookmarkUtils::filterAndFormat(
1503                     $LINKSDB,
1504                     $selection,
1505                     $prependNoteUrl,
1506                     index_url($_SERVER)
1507                 )
1508             );
1509         } catch (Exception $exc) {
1510             header('Content-Type: text/plain; charset=utf-8');
1511             echo $exc->getMessage();
1512             exit;
1513         }
1514         $now = new DateTime();
1515         header('Content-Type: text/html; charset=utf-8');
1516         header(
1517             'Content-disposition: attachment; filename=bookmarks_'
1518            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1519         );
1520         $PAGE->assign('date', $now->format(DateTime::RFC822));
1521         $PAGE->assign('eol', PHP_EOL);
1522         $PAGE->assign('selection', $selection);
1523         $PAGE->renderPage('export.bookmarks');
1524         exit;
1525     }
1526
1527     if ($targetPage == Router::$PAGE_IMPORT) {
1528         // Upload a Netscape bookmark dump to import its contents
1529
1530         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1531             // Show import dialog
1532             $PAGE->assign(
1533                 'maxfilesize',
1534                 get_max_upload_size(
1535                     ini_get('post_max_size'),
1536                     ini_get('upload_max_filesize'),
1537                     false
1538                 )
1539             );
1540             $PAGE->assign(
1541                 'maxfilesizeHuman',
1542                 get_max_upload_size(
1543                     ini_get('post_max_size'),
1544                     ini_get('upload_max_filesize'),
1545                     true
1546                 )
1547             );
1548             $PAGE->renderPage('import');
1549             exit;
1550         }
1551
1552         // Import bookmarks from an uploaded file
1553         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1554             // The file is too big or some form field may be missing.
1555             $msg = sprintf(
1556                 t(
1557                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1558                     .' (%s). Please upload in smaller chunks.'
1559                 ),
1560                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1561             );
1562             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1563             exit;
1564         }
1565         if (! $sessionManager->checkToken($_POST['token'])) {
1566             die('Wrong token.');
1567         }
1568         $status = NetscapeBookmarkUtils::import(
1569             $_POST,
1570             $_FILES,
1571             $LINKSDB,
1572             $conf,
1573             $history
1574         );
1575         echo '<script>alert("'.$status.'");document.location=\'?do='
1576              .Router::$PAGE_IMPORT .'\';</script>';
1577         exit;
1578     }
1579
1580     // Plugin administration page
1581     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1582         $pluginMeta = $pluginManager->getPluginsMeta();
1583
1584         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1585         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1586         // Load parameters.
1587         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1588         uasort(
1589             $enabledPlugins,
1590             function($a, $b) { return $a['order'] - $b['order']; }
1591         );
1592         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1593
1594         $PAGE->assign('enabledPlugins', $enabledPlugins);
1595         $PAGE->assign('disabledPlugins', $disabledPlugins);
1596         $PAGE->renderPage('pluginsadmin');
1597         exit;
1598     }
1599
1600     // Plugin administration form action
1601     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1602         try {
1603             if (isset($_POST['parameters_form'])) {
1604                 unset($_POST['parameters_form']);
1605                 foreach ($_POST as $param => $value) {
1606                     $conf->set('plugins.'. $param, escape($value));
1607                 }
1608             }
1609             else {
1610                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1611             }
1612             $conf->write(isLoggedIn());
1613             $history->updateSettings();
1614         }
1615         catch (Exception $e) {
1616             error_log(
1617                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1618                 $e->getMessage()
1619             );
1620
1621             // TODO: do not handle exceptions/errors in JS.
1622             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1623             exit;
1624         }
1625         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1626         exit;
1627     }
1628
1629     // Get a fresh token
1630     if ($targetPage == Router::$GET_TOKEN) {
1631         header('Content-Type:text/plain');
1632         echo $sessionManager->generateToken($conf);
1633         exit;
1634     }
1635
1636     // -------- Otherwise, simply display search form and links:
1637     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1638     exit;
1639 }
1640
1641 /**
1642  * Template for the list of links (<div id="linklist">)
1643  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1644  *
1645  * @param pageBuilder   $PAGE          pageBuilder instance.
1646  * @param LinkDB        $LINKSDB       LinkDB instance.
1647  * @param ConfigManager $conf          Configuration Manager instance.
1648  * @param PluginManager $pluginManager Plugin Manager instance.
1649  */
1650 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1651 {
1652     // Used in templates
1653     if (isset($_GET['searchtags'])) {
1654         if (! empty($_GET['searchtags'])) {
1655             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1656         } else {
1657             $searchtags = false;
1658         }
1659     } else {
1660         $searchtags = '';
1661     }
1662     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1663
1664     // Smallhash filter
1665     if (! empty($_SERVER['QUERY_STRING'])
1666         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1667         try {
1668             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1669         } catch (LinkNotFoundException $e) {
1670             $PAGE->render404($e->getMessage());
1671             exit;
1672         }
1673     } else {
1674         // Filter links according search parameters.
1675         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1676         $request = [
1677             'searchtags' => $searchtags,
1678             'searchterm' => $searchterm,
1679         ];
1680         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1681     }
1682
1683     // ---- Handle paging.
1684     $keys = array();
1685     foreach ($linksToDisplay as $key => $value) {
1686         $keys[] = $key;
1687     }
1688
1689
1690
1691     // Select articles according to paging.
1692     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1693     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1694     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1695     $page = $page < 1 ? 1 : $page;
1696     $page = $page > $pagecount ? $pagecount : $page;
1697     // Start index.
1698     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1699     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1700     $linkDisp = array();
1701     while ($i<$end && $i<count($keys))
1702     {
1703         $link = $linksToDisplay[$keys[$i]];
1704         $link['description'] = format_description(
1705             $link['description'],
1706             $conf->get('redirector.url'),
1707             $conf->get('redirector.encode_url')
1708         );
1709         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1710         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1711         $link['timestamp'] = $link['created']->getTimestamp();
1712         if (! empty($link['updated'])) {
1713             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1714         } else {
1715             $link['updated_timestamp'] = '';
1716         }
1717         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1718         uasort($taglist, 'strcasecmp');
1719         $link['taglist'] = $taglist;
1720         // Check for both signs of a note: starting with ? and 7 chars long.
1721         if ($link['url'][0] === '?' &&
1722             strlen($link['url']) === 7) {
1723             $link['url'] = index_url($_SERVER) . $link['url'];
1724         }
1725
1726         $linkDisp[$keys[$i]] = $link;
1727         $i++;
1728     }
1729
1730     // Compute paging navigation
1731     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1732     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1733     $previous_page_url = '';
1734     if ($i != count($keys)) {
1735         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1736     }
1737     $next_page_url='';
1738     if ($page>1) {
1739         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1740     }
1741
1742     // Fill all template fields.
1743     $data = array(
1744         'previous_page_url' => $previous_page_url,
1745         'next_page_url' => $next_page_url,
1746         'page_current' => $page,
1747         'page_max' => $pagecount,
1748         'result_count' => count($linksToDisplay),
1749         'search_term' => $searchterm,
1750         'search_tags' => $searchtags,
1751         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1752         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1753         'links' => $linkDisp,
1754     );
1755
1756     // If there is only a single link, we change on-the-fly the title of the page.
1757     if (count($linksToDisplay) == 1) {
1758         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1759     }
1760
1761     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1762
1763     foreach ($data as $key => $value) {
1764         $PAGE->assign($key, $value);
1765     }
1766
1767     return;
1768 }
1769
1770 /**
1771  * Compute the thumbnail for a link.
1772  *
1773  * With a link to the original URL.
1774  * Understands various services (youtube.com...)
1775  * Input: $url = URL for which the thumbnail must be found.
1776  *        $href = if provided, this URL will be followed instead of $url
1777  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1778  * Some of them may be missing.
1779  * Return an empty array if no thumbnail available.
1780  *
1781  * @param ConfigManager $conf Configuration Manager instance.
1782  * @param string        $url
1783  * @param string|bool   $href
1784  *
1785  * @return array
1786  */
1787 function computeThumbnail($conf, $url, $href = false)
1788 {
1789     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1790     if ($href==false) $href=$url;
1791
1792     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1793     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1794     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1795     $domain = parse_url($url,PHP_URL_HOST);
1796     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1797     {
1798         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1799         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1800                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1801     }
1802     if ($domain=='youtu.be') // Youtube short links
1803     {
1804         $path = parse_url($url,PHP_URL_PATH);
1805         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1806                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1807     }
1808     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1809     {
1810         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1811         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1812                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1813     }
1814
1815     if ($domain=='imgur.com')
1816     {
1817         $path = parse_url($url,PHP_URL_PATH);
1818         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1819         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1820                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1821         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1822                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1823
1824         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1825                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1826     }
1827     if ($domain=='i.imgur.com')
1828     {
1829         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1830         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1831                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1832     }
1833     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1834     {
1835         if (strpos($url,'dailymotion.com/video/')!==false)
1836         {
1837             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1838             return array('src'=>$thumburl,
1839                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1840         }
1841     }
1842     if (endsWith($domain,'.imageshack.us'))
1843     {
1844         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1845         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1846         {
1847             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1848             return array('src'=>$thumburl,
1849                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1850         }
1851     }
1852
1853     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1854     // So we deport the thumbnail generation in order not to slow down page generation
1855     // (and we also cache the thumbnail)
1856
1857     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1858
1859     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1860         || $domain=='vimeo.com'
1861         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1862         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1863     )
1864     {
1865         if ($domain=='vimeo.com')
1866         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1867             $path = parse_url($url,PHP_URL_PATH);
1868             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1869         }
1870         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1871         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1872             $path = parse_url($url,PHP_URL_PATH);
1873             if (!preg_match('!/\d+.+?!',$path)) return array();
1874         }
1875         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1876         {   // Make sure this TED URL points to a video (/talks/...)
1877             $path = parse_url($url,PHP_URL_PATH);
1878             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1879         }
1880         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1881         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1882                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1883     }
1884
1885     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1886     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1887     // But using the extension will do.
1888     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1889     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1890     {
1891         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1892         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1893                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1894     }
1895     return array(); // No thumbnail.
1896
1897 }
1898
1899
1900 // Returns the HTML code to display a thumbnail for a link
1901 // with a link to the original URL.
1902 // Understands various services (youtube.com...)
1903 // Input: $url = URL for which the thumbnail must be found.
1904 //        $href = if provided, this URL will be followed instead of $url
1905 // Returns '' if no thumbnail available.
1906 function thumbnail($url,$href=false)
1907 {
1908     // FIXME!
1909     global $conf;
1910     $t = computeThumbnail($conf, $url,$href);
1911     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1912
1913     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1914     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1915     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1916     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1917     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1918     $html.='></a>';
1919     return $html;
1920 }
1921
1922 // Returns the HTML code to display a thumbnail for a link
1923 // for the picture wall (using lazy image loading)
1924 // Understands various services (youtube.com...)
1925 // Input: $url = URL for which the thumbnail must be found.
1926 //        $href = if provided, this URL will be followed instead of $url
1927 // Returns '' if no thumbnail available.
1928 function lazyThumbnail($conf, $url,$href=false)
1929 {
1930     // FIXME!
1931     global $conf;
1932     $t = computeThumbnail($conf, $url,$href);
1933     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1934
1935     $html='<a href="'.escape($t['href']).'">';
1936
1937     // Lazy image
1938     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1939
1940     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1941     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1942     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1943     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1944     $html.='>';
1945
1946     // No-JavaScript fallback.
1947     $html.='<noscript><img src="'.escape($t['src']).'"';
1948     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1949     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1950     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1951     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1952     $html.='></noscript></a>';
1953
1954     return $html;
1955 }
1956
1957
1958 /**
1959  * Installation
1960  * This function should NEVER be called if the file data/config.php exists.
1961  *
1962  * @param ConfigManager  $conf           Configuration Manager instance.
1963  * @param SessionManager $sessionManager SessionManager instance
1964  */
1965 function install($conf, $sessionManager) {
1966     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1967     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1968
1969
1970     // This part makes sure sessions works correctly.
1971     // (Because on some hosts, session.save_path may not be set correctly,
1972     // or we may not have write access to it.)
1973     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1974     {
1975         // Step 2: Check if data in session is correct.
1976         $msg = t(
1977             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1978             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1979             'and that you have write access to it.<br>'.
1980             'It currently points to %s.<br>'.
1981             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1982             'or any custom hostname without a dot causes cookie storage to fail. '.
1983             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1984         );
1985         $msg = sprintf($msg, session_save_path());
1986         echo $msg;
1987         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1988         die;
1989     }
1990     if (!isset($_SESSION['session_tested']))
1991     {   // Step 1 : Try to store data in session and reload page.
1992         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1993         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1994     }
1995     if (isset($_GET['test_session']))
1996     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1997         header('Location: '.index_url($_SERVER));
1998     }
1999
2000
2001     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2002     {
2003         $tz = 'UTC';
2004         if (!empty($_POST['continent']) && !empty($_POST['city'])
2005             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2006         ) {
2007             $tz = $_POST['continent'].'/'.$_POST['city'];
2008         }
2009         $conf->set('general.timezone', $tz);
2010         $login = $_POST['setlogin'];
2011         $conf->set('credentials.login', $login);
2012         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2013         $conf->set('credentials.salt', $salt);
2014         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2015         if (!empty($_POST['title'])) {
2016             $conf->set('general.title', escape($_POST['title']));
2017         } else {
2018             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2019         }
2020         $conf->set('translation.language', escape($_POST['language']));
2021         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2022         $conf->set('api.enabled', !empty($_POST['enableApi']));
2023         $conf->set(
2024             'api.secret',
2025             generate_api_secret(
2026                 $conf->get('credentials.login'),
2027                 $conf->get('credentials.salt')
2028             )
2029         );
2030         try {
2031             // Everything is ok, let's create config file.
2032             $conf->write(isLoggedIn());
2033         }
2034         catch(Exception $e) {
2035             error_log(
2036                     'ERROR while writing config file after installation.' . PHP_EOL .
2037                     $e->getMessage()
2038                 );
2039
2040             // TODO: do not handle exceptions/errors in JS.
2041             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2042             exit;
2043         }
2044         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2045         exit;
2046     }
2047
2048     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2049     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2050     $PAGE->assign('continents', $continents);
2051     $PAGE->assign('cities', $cities);
2052     $PAGE->assign('languages', Languages::getAvailableLanguages());
2053     $PAGE->renderPage('install');
2054     exit;
2055 }
2056
2057 /**
2058  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2059  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2060  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2061  * This function is called by passing the URL:
2062  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2063  * [URL] is the URL of the link (e.g. a flickr page)
2064  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2065  * The function below will fetch the image from the webservice and store it in the cache.
2066  *
2067  * @param ConfigManager $conf Configuration Manager instance,
2068  */
2069 function genThumbnail($conf)
2070 {
2071     // Make sure the parameters in the URL were generated by us.
2072     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2073     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2074
2075     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2076     // Let's see if we don't already have the image for this URL in the cache.
2077     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2078     if (is_file($cacheDir .'/'. $thumbname))
2079     {   // We have the thumbnail, just serve it:
2080         header('Content-Type: image/jpeg');
2081         echo file_get_contents($cacheDir .'/'. $thumbname);
2082         return;
2083     }
2084     // We may also serve a blank image (if service did not respond)
2085     $blankname=hash('sha1',$_GET['url']).'.gif';
2086     if (is_file($cacheDir .'/'. $blankname))
2087     {
2088         header('Content-Type: image/gif');
2089         echo file_get_contents($cacheDir .'/'. $blankname);
2090         return;
2091     }
2092
2093     // Otherwise, generate the thumbnail.
2094     $url = $_GET['url'];
2095     $domain = parse_url($url,PHP_URL_HOST);
2096
2097     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2098     {
2099         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2100         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2101
2102         // Is this a link to an image, or to a flickr page ?
2103         $imageurl='';
2104         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2105         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2106             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2107             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2108         }
2109         else // This is a flickr page (html)
2110         {
2111             // Get the flickr html page.
2112             list($headers, $content) = get_http_response($url, 20);
2113             if (strpos($headers[0], '200 OK') !== false)
2114             {
2115                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2116                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2117                 if (!empty($matches[1])) $imageurl=$matches[1];
2118
2119                 // In albums (and some other pages), the link rel="image_src" is not provided,
2120                 // but flickr provides:
2121                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2122                 if ($imageurl=='')
2123                 {
2124                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2125                     if (!empty($matches[1])) $imageurl=$matches[1];
2126                 }
2127             }
2128         }
2129
2130         if ($imageurl!='')
2131         {   // Let's download the image.
2132             // Image is 240x120, so 10 seconds to download should be enough.
2133             list($headers, $content) = get_http_response($imageurl, 10);
2134             if (strpos($headers[0], '200 OK') !== false) {
2135                 // Save image to cache.
2136                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2137                 header('Content-Type: image/jpeg');
2138                 echo $content;
2139                 return;
2140             }
2141         }
2142     }
2143
2144     elseif ($domain=='vimeo.com' )
2145     {
2146         // This is more complex: we have to perform a HTTP request, then parse the result.
2147         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2148         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2149         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2150         if (strpos($headers[0], '200 OK') !== false) {
2151             $t = unserialize($content);
2152             $imageurl = $t[0]['thumbnail_medium'];
2153             // Then we download the image and serve it to our client.
2154             list($headers, $content) = get_http_response($imageurl, 10);
2155             if (strpos($headers[0], '200 OK') !== false) {
2156                 // Save image to cache.
2157                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2158                 header('Content-Type: image/jpeg');
2159                 echo $content;
2160                 return;
2161             }
2162         }
2163     }
2164
2165     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2166     {
2167         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2168         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2169         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2170         list($headers, $content) = get_http_response($url, 5);
2171         if (strpos($headers[0], '200 OK') !== false) {
2172             // Extract the link to the thumbnail
2173             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2174             if (!empty($matches[1]))
2175             {   // Let's download the image.
2176                 $imageurl=$matches[1];
2177                 // No control on image size, so wait long enough
2178                 list($headers, $content) = get_http_response($imageurl, 20);
2179                 if (strpos($headers[0], '200 OK') !== false) {
2180                     $filepath = $cacheDir .'/'. $thumbname;
2181                     file_put_contents($filepath, $content); // Save image to cache.
2182                     if (resizeImage($filepath))
2183                     {
2184                         header('Content-Type: image/jpeg');
2185                         echo file_get_contents($filepath);
2186                         return;
2187                     }
2188                 }
2189             }
2190         }
2191     }
2192
2193     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2194     {
2195         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2196         // http://xkcd.com/327/
2197         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2198         list($headers, $content) = get_http_response($url, 5);
2199         if (strpos($headers[0], '200 OK') !== false) {
2200             // Extract the link to the thumbnail
2201             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2202             if (!empty($matches[1]))
2203             {   // Let's download the image.
2204                 $imageurl=$matches[1];
2205                 // No control on image size, so wait long enough
2206                 list($headers, $content) = get_http_response($imageurl, 20);
2207                 if (strpos($headers[0], '200 OK') !== false) {
2208                     $filepath = $cacheDir.'/'.$thumbname;
2209                     // Save image to cache.
2210                     file_put_contents($filepath, $content);
2211                     if (resizeImage($filepath))
2212                     {
2213                         header('Content-Type: image/jpeg');
2214                         echo file_get_contents($filepath);
2215                         return;
2216                     }
2217                 }
2218             }
2219         }
2220     }
2221
2222     else
2223     {
2224         // For all other domains, we try to download the image and make a thumbnail.
2225         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2226         list($headers, $content) = get_http_response($url, 30);
2227         if (strpos($headers[0], '200 OK') !== false) {
2228             $filepath = $cacheDir .'/'.$thumbname;
2229             // Save image to cache.
2230             file_put_contents($filepath, $content);
2231             if (resizeImage($filepath))
2232             {
2233                 header('Content-Type: image/jpeg');
2234                 echo file_get_contents($filepath);
2235                 return;
2236             }
2237         }
2238     }
2239
2240
2241     // Otherwise, return an empty image (8x8 transparent gif)
2242     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2243     // Also put something in cache so that this URL is not requested twice.
2244     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2245     header('Content-Type: image/gif');
2246     echo $blankgif;
2247 }
2248
2249 // Make a thumbnail of the image (to width: 120 pixels)
2250 // Returns true if success, false otherwise.
2251 function resizeImage($filepath)
2252 {
2253     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2254
2255     // Trick: some stupid people rename GIF as JPEG... or else.
2256     // So we really try to open each image type whatever the extension is.
2257     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2258     $im=false;
2259     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2260     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2261     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2262     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2263     $w = imagesx($im);
2264     $h = imagesy($im);
2265     $ystart = 0; $yheight=$h;
2266     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2267     $nw = 120;   // Desired width
2268     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2269     // Resize image:
2270     $im2 = imagecreatetruecolor($nw,$nh);
2271     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2272     imageinterlace($im2,true); // For progressive JPEG.
2273     $tempname=$filepath.'_TEMP.jpg';
2274     imagejpeg($im2, $tempname, 90);
2275     imagedestroy($im);
2276     imagedestroy($im2);
2277     unlink($filepath);
2278     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2279     return true;
2280 }
2281
2282 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2283 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2284 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2285     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2286 }
2287
2288 try {
2289     $history = new History($conf->get('resource.history'));
2290 } catch(Exception $e) {
2291     die($e->getMessage());
2292 }
2293
2294 $linkDb = new LinkDB(
2295     $conf->get('resource.datastore'),
2296     isLoggedIn(),
2297     $conf->get('privacy.hide_public_links'),
2298     $conf->get('redirector.url'),
2299     $conf->get('redirector.encode_url')
2300 );
2301
2302 $container = new \Slim\Container();
2303 $container['conf'] = $conf;
2304 $container['plugins'] = $pluginManager;
2305 $container['history'] = $history;
2306 $app = new \Slim\App($container);
2307
2308 // REST API routes
2309 $app->group('/api/v1', function() {
2310     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2311     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2312     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2313     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2314     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2315     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2316     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2317 })->add('\Shaarli\Api\ApiMiddleware');
2318
2319 $response = $app->run(true);
2320 // Hack to make Slim and Shaarli router work together:
2321 // If a Slim route isn't found and NOT API call, we call renderPage().
2322 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2323     // We use UTF-8 for proper international characters handling.
2324     header('Content-Type: text/html; charset=utf-8');
2325     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2326 } else {
2327     $app->respond($response);
2328 }