index.php

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