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