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['visibility']);
 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='. $_POST['login'];
 440         if (isset($_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     /* We need to spread the articles on 3 columns.
 615        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 616        so I manually spread entries with a simple method: I roughly evaluate the
 617        height of a div according to title and description length.
 618     */
 619     $columns = array(array(), array(), array()); // Entries to display, for each column.
 620     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 621     foreach($linksToDisplay as $key => $link) {
 622         // Roughly estimate length of entry (by counting characters)
 623         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 624         // Description: 836 characters gives roughly 342 pixel height.
 625         // This is not perfect, but it's usually OK.
 626         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 627         if ($link['thumbnail']) {
 628           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 629         }
 630         // Then put in column which is the less filled:
 631         $smallest = min($fill); // find smallest value in array.
 632         $index = array_search($smallest, $fill); // find index of this smallest value.
 633         array_push($columns[$index], $link); // Put entry in this column.
 634         $fill[$index] += $length;
 635     }
 636
 637     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 638     $data = array(
 639         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 640         'linksToDisplay' => $linksToDisplay,
 641         'cols' => $columns,
 642         'day' => $dayDate->getTimestamp(),
 643         'dayDate' => $dayDate,
 644         'previousday' => $previousday,
 645         'nextday' => $nextday,
 646     );
 647
 648     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 649
 650     foreach ($data as $key => $value) {
 651         $pageBuilder->assign($key, $value);
 652     }
 653
 654     $pageBuilder->renderPage('daily');
 655     exit;
 656 }
 657
 658 /**
 659  * Renders the linklist
 660  *
 661  * @param pageBuilder   $PAGE    pageBuilder instance.
 662  * @param LinkDB        $LINKSDB LinkDB instance.
 663  * @param ConfigManager $conf    Configuration Manager instance.
 664  * @param PluginManager $pluginManager Plugin Manager instance.
 665  */
 666 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 667     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 668     $PAGE->renderPage('linklist');
 669 }
 670
 671 /**
 672  * Render HTML page (according to URL parameters and user rights)
 673  *
 674  * @param ConfigManager  $conf           Configuration Manager instance.
 675  * @param PluginManager  $pluginManager  Plugin Manager instance,
 676  * @param LinkDB         $LINKSDB
 677  * @param History        $history        instance
 678  * @param SessionManager $sessionManager SessionManager instance
 679  */
 680 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager)
 681 {
 682     $updater = new Updater(
 683         read_updates_file($conf->get('resource.updates')),
 684         $LINKSDB,
 685         $conf,
 686         isLoggedIn()
 687     );
 688     try {
 689         $newUpdates = $updater->update();
 690         if (! empty($newUpdates)) {
 691             write_updates_file(
 692                 $conf->get('resource.updates'),
 693                 $updater->getDoneUpdates()
 694             );
 695         }
 696     }
 697     catch(Exception $e) {
 698         die($e->getMessage());
 699     }
 700
 701     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 702     $PAGE->assign('linkcount', count($LINKSDB));
 703     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 704     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 705
 706     // Determine which page will be rendered.
 707     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 708     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 709
 710     if (
 711         // if the user isn't logged in
 712         !isLoggedIn() &&
 713         // and Shaarli doesn't have public content...
 714         $conf->get('privacy.hide_public_links') &&
 715         // and is configured to enforce the login
 716         $conf->get('privacy.force_login') &&
 717         // and the current page isn't already the login page
 718         $targetPage !== Router::$PAGE_LOGIN &&
 719         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 720         $targetPage !== Router::$PAGE_FEED_ATOM &&
 721         $targetPage !== Router::$PAGE_FEED_RSS
 722     ) {
 723         // force current page to be the login page
 724         $targetPage = Router::$PAGE_LOGIN;
 725     }
 726
 727     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 728     // Then assign generated data to RainTPL.
 729     $common_hooks = array(
 730         'includes',
 731         'header',
 732         'footer',
 733     );
 734
 735     foreach($common_hooks as $name) {
 736         $plugin_data = array();
 737         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 738             array(
 739                 'target' => $targetPage,
 740                 'loggedin' => isLoggedIn()
 741             )
 742         );
 743         $PAGE->assign('plugins_' . $name, $plugin_data);
 744     }
 745
 746     // -------- Display login form.
 747     if ($targetPage == Router::$PAGE_LOGIN)
 748     {
 749         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 750         if (isset($_GET['username'])) {
 751             $PAGE->assign('username', escape($_GET['username']));
 752         }
 753         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 754         // add default state of the 'remember me' checkbox
 755         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 756         $PAGE->renderPage('loginform');
 757         exit;
 758     }
 759     // -------- User wants to logout.
 760     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 761     {
 762         invalidateCaches($conf->get('resource.page_cache'));
 763         logout();
 764         header('Location: ?');
 765         exit;
 766     }
 767
 768     // -------- Picture wall
 769     if ($targetPage == Router::$PAGE_PICWALL)
 770     {
 771         // Optionally filter the results:
 772         $links = $LINKSDB->filterSearch($_GET);
 773         $linksToDisplay = array();
 774
 775         // Get only links which have a thumbnail.
 776         foreach($links as $link)
 777         {
 778             $permalink='?'.$link['shorturl'];
 779             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 780             if ($thumb!='') // Only output links which have a thumbnail.
 781             {
 782                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 783                 $linksToDisplay[]=$link; // Add to array.
 784             }
 785         }
 786
 787         $data = array(
 788             'linksToDisplay' => $linksToDisplay,
 789         );
 790         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 791
 792         foreach ($data as $key => $value) {
 793             $PAGE->assign($key, $value);
 794         }
 795
 796         $PAGE->renderPage('picwall');
 797         exit;
 798     }
 799
 800     // -------- Tag cloud
 801     if ($targetPage == Router::$PAGE_TAGCLOUD)
 802     {
 803         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 804         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 805         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 806
 807         // We sort tags alphabetically, then choose a font size according to count.
 808         // First, find max value.
 809         $maxcount = 0;
 810         foreach ($tags as $value) {
 811             $maxcount = max($maxcount, $value);
 812         }
 813
 814         alphabetical_sort($tags, false, true);
 815
 816         $tagList = array();
 817         foreach($tags as $key => $value) {
 818             if (in_array($key, $filteringTags)) {
 819                 continue;
 820             }
 821             // Tag font size scaling:
 822             //   default 15 and 30 logarithm bases affect scaling,
 823             //   22 and 6 are arbitrary font sizes for max and min sizes.
 824             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 825             $tagList[$key] = array(
 826                 'count' => $value,
 827                 'size' => number_format($size, 2, '.', ''),
 828             );
 829         }
 830
 831         $data = array(
 832             'search_tags' => implode(' ', escape($filteringTags)),
 833             'tags' => $tagList,
 834         );
 835         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 836
 837         foreach ($data as $key => $value) {
 838             $PAGE->assign($key, $value);
 839         }
 840
 841         $PAGE->renderPage('tag.cloud');
 842         exit;
 843     }
 844
 845     // -------- Tag list
 846     if ($targetPage == Router::$PAGE_TAGLIST)
 847     {
 848         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 849         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 850         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 851         foreach ($filteringTags as $tag) {
 852             if (array_key_exists($tag, $tags)) {
 853                 unset($tags[$tag]);
 854             }
 855         }
 856
 857         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 858             alphabetical_sort($tags, false, true);
 859         }
 860
 861         $data = [
 862             'search_tags' => implode(' ', escape($filteringTags)),
 863             'tags' => $tags,
 864         ];
 865         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 866
 867         foreach ($data as $key => $value) {
 868             $PAGE->assign($key, $value);
 869         }
 870
 871         $PAGE->renderPage('tag.list');
 872         exit;
 873     }
 874
 875     // Daily page.
 876     if ($targetPage == Router::$PAGE_DAILY) {
 877         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 878     }
 879
 880     // ATOM and RSS feed.
 881     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 882         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 883         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 884
 885         // Cache system
 886         $query = $_SERVER['QUERY_STRING'];
 887         $cache = new CachedPage(
 888             $conf->get('resource.page_cache'),
 889             page_url($_SERVER),
 890             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 891         );
 892         $cached = $cache->cachedVersion();
 893         if (!empty($cached)) {
 894             echo $cached;
 895             exit;
 896         }
 897
 898         // Generate data.
 899         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 900         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 901         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 902         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 903         $data = $feedGenerator->buildData();
 904
 905         // Process plugin hook.
 906         $pluginManager->executeHooks('render_feed', $data, array(
 907             'loggedin' => isLoggedIn(),
 908             'target' => $targetPage,
 909         ));
 910
 911         // Render the template.
 912         $PAGE->assignAll($data);
 913         $PAGE->renderPage('feed.'. $feedType);
 914         $cache->cache(ob_get_contents());
 915         ob_end_flush();
 916         exit;
 917     }
 918
 919     // Display opensearch plugin (XML)
 920     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 921         header('Content-Type: application/xml; charset=utf-8');
 922         $PAGE->assign('serverurl', index_url($_SERVER));
 923         $PAGE->renderPage('opensearch');
 924         exit;
 925     }
 926
 927     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 928     if (isset($_GET['addtag']))
 929     {
 930         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 931         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 932         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 933
 934         // Prevent redirection loop
 935         if (isset($params['addtag'])) {
 936             unset($params['addtag']);
 937         }
 938
 939         // Check if this tag is already in the search query and ignore it if it is.
 940         // Each tag is always separated by a space
 941         if (isset($params['searchtags'])) {
 942             $current_tags = explode(' ', $params['searchtags']);
 943         } else {
 944             $current_tags = array();
 945         }
 946         $addtag = true;
 947         foreach ($current_tags as $value) {
 948             if ($value === $_GET['addtag']) {
 949                 $addtag = false;
 950                 break;
 951             }
 952         }
 953         // Append the tag if necessary
 954         if (empty($params['searchtags'])) {
 955             $params['searchtags'] = trim($_GET['addtag']);
 956         }
 957         else if ($addtag) {
 958             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 959         }
 960
 961         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 962         header('Location: ?'.http_build_query($params));
 963         exit;
 964     }
 965
 966     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 967     if (isset($_GET['removetag'])) {
 968         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 969         if (empty($_SERVER['HTTP_REFERER'])) {
 970             header('Location: ?');
 971             exit;
 972         }
 973
 974         // In case browser does not send HTTP_REFERER
 975         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 976
 977         // Prevent redirection loop
 978         if (isset($params['removetag'])) {
 979             unset($params['removetag']);
 980         }
 981
 982         if (isset($params['searchtags'])) {
 983             $tags = explode(' ', $params['searchtags']);
 984             // Remove value from array $tags.
 985             $tags = array_diff($tags, array($_GET['removetag']));
 986             $params['searchtags'] = implode(' ',$tags);
 987
 988             if (empty($params['searchtags'])) {
 989                 unset($params['searchtags']);
 990             }
 991
 992             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 993         }
 994         header('Location: ?'.http_build_query($params));
 995         exit;
 996     }
 997
 998     // -------- User wants to change the number of links per page (linksperpage=...)
 999     if (isset($_GET['linksperpage'])) {
1000         if (is_numeric($_GET['linksperpage'])) {
1001             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1002         }
1003
1004         if (! empty($_SERVER['HTTP_REFERER'])) {
1005             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1006         } else {
1007             $location = '?';
1008         }
1009         header('Location: '. $location);
1010         exit;
1011     }
1012
1013     // -------- User wants to see only private links (toggle)
1014     if (isset($_GET['visibility'])) {
1015         unset($_SESSION['visibility']);
1016         if ($_GET['visibility'] === 'private') {
1017             $_SESSION['visibility'] = 'private'; // See only private links
1018         } else if ($_GET['visibility'] === 'public') {
1019             $_SESSION['visibility'] = 'public'; // See only public links
1020         }
1021
1022         if (! empty($_SERVER['HTTP_REFERER'])) {
1023             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
1024         } else {
1025             $location = '?';
1026         }
1027         header('Location: '. $location);
1028         exit;
1029     }
1030
1031     // -------- User wants to see only untagged links (toggle)
1032     if (isset($_GET['untaggedonly'])) {
1033         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1034
1035         if (! empty($_SERVER['HTTP_REFERER'])) {
1036             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1037         } else {
1038             $location = '?';
1039         }
1040         header('Location: '. $location);
1041         exit;
1042     }
1043
1044     // -------- Handle other actions allowed for non-logged in users:
1045     if (!isLoggedIn())
1046     {
1047         // User tries to post new link but is not logged in:
1048         // Show login screen, then redirect to ?post=...
1049         if (isset($_GET['post']))
1050         {
1051             header( // Redirect to login page, then back to post link.
1052                 'Location: ?do=login&post='.urlencode($_GET['post']).
1053                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1054                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1055                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1056                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1057             );
1058             exit;
1059         }
1060
1061         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1062         if (isset($_GET['edit_link'])) {
1063             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1064             exit;
1065         }
1066
1067         exit; // Never remove this one! All operations below are reserved for logged in user.
1068     }
1069
1070     // -------- All other functions are reserved for the registered user:
1071
1072     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1073     if ($targetPage == Router::$PAGE_TOOLS)
1074     {
1075         $data = [
1076             'pageabsaddr' => index_url($_SERVER),
1077             'sslenabled' => is_https($_SERVER),
1078         ];
1079         $pluginManager->executeHooks('render_tools', $data);
1080
1081         foreach ($data as $key => $value) {
1082             $PAGE->assign($key, $value);
1083         }
1084
1085         $PAGE->renderPage('tools');
1086         exit;
1087     }
1088
1089     // -------- User wants to change his/her password.
1090     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1091     {
1092         if ($conf->get('security.open_shaarli')) {
1093             die(t('You are not supposed to change a password on an Open Shaarli.'));
1094         }
1095
1096         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1097         {
1098             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1099
1100             // Make sure old password is correct.
1101             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1102             if ($oldhash!= $conf->get('credentials.hash')) {
1103                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1104                 exit;
1105             }
1106             // Save new password
1107             // Salt renders rainbow-tables attacks useless.
1108             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1109             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1110             try {
1111                 $conf->write(isLoggedIn());
1112             }
1113             catch(Exception $e) {
1114                 error_log(
1115                     'ERROR while writing config file after changing password.' . PHP_EOL .
1116                     $e->getMessage()
1117                 );
1118
1119                 // TODO: do not handle exceptions/errors in JS.
1120                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1121                 exit;
1122             }
1123             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1124             exit;
1125         }
1126         else // show the change password form.
1127         {
1128             $PAGE->renderPage('changepassword');
1129             exit;
1130         }
1131     }
1132
1133     // -------- User wants to change configuration
1134     if ($targetPage == Router::$PAGE_CONFIGURE)
1135     {
1136         if (!empty($_POST['title']) )
1137         {
1138             if (!$sessionManager->checkToken($_POST['token'])) {
1139                 die(t('Wrong token.')); // Go away!
1140             }
1141             $tz = 'UTC';
1142             if (!empty($_POST['continent']) && !empty($_POST['city'])
1143                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1144             ) {
1145                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1146             }
1147             $conf->set('general.timezone', $tz);
1148             $conf->set('general.title', escape($_POST['title']));
1149             $conf->set('general.header_link', escape($_POST['titleLink']));
1150             $conf->set('resource.theme', escape($_POST['theme']));
1151             $conf->set('redirector.url', escape($_POST['redirector']));
1152             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1153             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1154             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1155             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1156             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1157             $conf->set('api.enabled', !empty($_POST['enableApi']));
1158             $conf->set('api.secret', escape($_POST['apiSecret']));
1159             $conf->set('translation.language', escape($_POST['language']));
1160
1161             try {
1162                 $conf->write(isLoggedIn());
1163                 $history->updateSettings();
1164                 invalidateCaches($conf->get('resource.page_cache'));
1165             }
1166             catch(Exception $e) {
1167                 error_log(
1168                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1169                     $e->getMessage()
1170                 );
1171
1172                 // TODO: do not handle exceptions/errors in JS.
1173                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1174                 exit;
1175             }
1176             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1177             exit;
1178         }
1179         else // Show the configuration form.
1180         {
1181             $PAGE->assign('title', $conf->get('general.title'));
1182             $PAGE->assign('theme', $conf->get('resource.theme'));
1183             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1184             $PAGE->assign('redirector', $conf->get('redirector.url'));
1185             list($continents, $cities) = generateTimeZoneData(
1186                 timezone_identifiers_list(),
1187                 $conf->get('general.timezone')
1188             );
1189             $PAGE->assign('continents', $continents);
1190             $PAGE->assign('cities', $cities);
1191             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1192             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1193             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1194             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1195             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1196             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1197             $PAGE->assign('api_secret', $conf->get('api.secret'));
1198             $PAGE->assign('languages', Languages::getAvailableLanguages());
1199             $PAGE->assign('language', $conf->get('translation.language'));
1200             $PAGE->renderPage('configure');
1201             exit;
1202         }
1203     }
1204
1205     // -------- User wants to rename a tag or delete it
1206     if ($targetPage == Router::$PAGE_CHANGETAG)
1207     {
1208         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1209             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1210             $PAGE->renderPage('changetag');
1211             exit;
1212         }
1213
1214         if (!$sessionManager->checkToken($_POST['token'])) {
1215             die(t('Wrong token.'));
1216         }
1217
1218         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1219         $LINKSDB->save($conf->get('resource.page_cache'));
1220         foreach ($alteredLinks as $link) {
1221             $history->updateLink($link);
1222         }
1223         $delete = empty($_POST['totag']);
1224         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1225         $count = count($alteredLinks);
1226         $alert = $delete
1227             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1228             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1229         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1230         exit;
1231     }
1232
1233     // -------- User wants to add a link without using the bookmarklet: Show form.
1234     if ($targetPage == Router::$PAGE_ADDLINK)
1235     {
1236         $PAGE->renderPage('addlink');
1237         exit;
1238     }
1239
1240     // -------- User clicked the "Save" button when editing a link: Save link to database.
1241     if (isset($_POST['save_edit']))
1242     {
1243         // Go away!
1244         if (! $sessionManager->checkToken($_POST['token'])) {
1245             die(t('Wrong token.'));
1246         }
1247
1248         // lf_id should only be present if the link exists.
1249         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1250         // Linkdate is kept here to:
1251         //   - use the same permalink for notes as they're displayed when creating them
1252         //   - let users hack creation date of their posts
1253         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1254         $linkdate = escape($_POST['lf_linkdate']);
1255         if (isset($LINKSDB[$id])) {
1256             // Edit
1257             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1258             $updated = new DateTime();
1259             $shortUrl = $LINKSDB[$id]['shorturl'];
1260             $new = false;
1261         } else {
1262             // New link
1263             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1264             $updated = null;
1265             $shortUrl = link_small_hash($created, $id);
1266             $new = true;
1267         }
1268
1269         // Remove multiple spaces.
1270         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1271         // Remove first '-' char in tags.
1272         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1273         // Remove duplicates.
1274         $tags = implode(' ', array_unique(explode(' ', $tags)));
1275
1276         if (empty(trim($_POST['lf_url']))) {
1277             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1278         }
1279         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1280
1281         $link = array(
1282             'id' => $id,
1283             'title' => trim($_POST['lf_title']),
1284             'url' => $url,
1285             'description' => $_POST['lf_description'],
1286             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1287             'created' => $created,
1288             'updated' => $updated,
1289             'tags' => str_replace(',', ' ', $tags),
1290             'shorturl' => $shortUrl,
1291         );
1292
1293         // If title is empty, use the URL as title.
1294         if ($link['title'] == '') {
1295             $link['title'] = $link['url'];
1296         }
1297
1298         $pluginManager->executeHooks('save_link', $link);
1299
1300         $LINKSDB[$id] = $link;
1301         $LINKSDB->save($conf->get('resource.page_cache'));
1302         if ($new) {
1303             $history->addLink($link);
1304         } else {
1305             $history->updateLink($link);
1306         }
1307
1308         // If we are called from the bookmarklet, we must close the popup:
1309         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1310             echo '<script>self.close();</script>';
1311             exit;
1312         }
1313
1314         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1315         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1316         // Scroll to the link which has been edited.
1317         $location .= '#' . $link['shorturl'];
1318         // After saving the link, redirect to the page the user was on.
1319         header('Location: '. $location);
1320         exit;
1321     }
1322
1323     // -------- User clicked the "Cancel" button when editing a link.
1324     if (isset($_POST['cancel_edit']))
1325     {
1326         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1327         if (! isset($LINKSDB[$id])) {
1328             header('Location: ?');
1329         }
1330         // If we are called from the bookmarklet, we must close the popup:
1331         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1332         $link = $LINKSDB[$id];
1333         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1334         // Scroll to the link which has been edited.
1335         $returnurl .= '#'. $link['shorturl'];
1336         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1337         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1338         exit;
1339     }
1340
1341     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1342     if ($targetPage == Router::$PAGE_DELETELINK)
1343     {
1344         if (! $sessionManager->checkToken($_GET['token'])) {
1345             die(t('Wrong token.'));
1346         }
1347
1348         $ids = trim($_GET['lf_linkdate']);
1349         if (strpos($ids, ' ') !== false) {
1350             // multiple, space-separated ids provided
1351             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1352         } else {
1353             // only a single id provided
1354             $ids = [$ids];
1355         }
1356         // assert at least one id is given
1357         if(!count($ids)){
1358             die('no id provided');
1359         }
1360         foreach ($ids as $id) {
1361             $id = (int) escape($id);
1362             $link = $LINKSDB[$id];
1363             $pluginManager->executeHooks('delete_link', $link);
1364             unset($LINKSDB[$id]);
1365         }
1366         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1367         $history->deleteLink($link);
1368
1369         // If we are called from the bookmarklet, we must close the popup:
1370         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1371
1372         $location = '?';
1373         if (isset($_SERVER['HTTP_REFERER'])) {
1374             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1375             $location = generateLocation(
1376                     $_SERVER['HTTP_REFERER'],
1377                     $_SERVER['HTTP_HOST'],
1378                     ['delete_link', 'edit_link', $link['shorturl']]
1379             );
1380         }
1381
1382         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1383         exit;
1384     }
1385
1386     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1387     if (isset($_GET['edit_link']))
1388     {
1389         $id = (int) escape($_GET['edit_link']);
1390         $link = $LINKSDB[$id];  // Read database
1391         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1392         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1393         $data = array(
1394             'link' => $link,
1395             'link_is_new' => false,
1396             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1397             'tags' => $LINKSDB->linksCountPerTag(),
1398         );
1399         $pluginManager->executeHooks('render_editlink', $data);
1400
1401         foreach ($data as $key => $value) {
1402             $PAGE->assign($key, $value);
1403         }
1404
1405         $PAGE->renderPage('editlink');
1406         exit;
1407     }
1408
1409     // -------- User want to post a new link: Display link edit form.
1410     if (isset($_GET['post'])) {
1411         $url = cleanup_url($_GET['post']);
1412
1413         $link_is_new = false;
1414         // Check if URL is not already in database (in this case, we will edit the existing link)
1415         $link = $LINKSDB->getLinkFromUrl($url);
1416         if (! $link)
1417         {
1418             $link_is_new = true;
1419             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1420             // Get title if it was provided in URL (by the bookmarklet).
1421             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1422             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1423             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1424             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1425             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1426             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1427             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1428                 // Short timeout to keep the application responsive
1429                 list($headers, $content) = get_http_response($url, 4);
1430                 if (strpos($headers[0], '200 OK') !== false) {
1431                     // Retrieve charset.
1432                     $charset = get_charset($headers, $content);
1433                     // Extract title.
1434                     $title = html_extract_title($content);
1435                     // Re-encode title in utf-8 if necessary.
1436                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1437                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1438                     }
1439                 }
1440             }
1441
1442             if ($url == '') {
1443                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1444                 $title = $conf->get('general.default_note_title', t('Note: '));
1445             }
1446             $url = escape($url);
1447             $title = escape($title);
1448
1449             $link = array(
1450                 'linkdate' => $linkdate,
1451                 'title' => $title,
1452                 'url' => $url,
1453                 'description' => $description,
1454                 'tags' => $tags,
1455                 'private' => $private,
1456             );
1457         } else {
1458             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1459         }
1460
1461         $data = array(
1462             'link' => $link,
1463             'link_is_new' => $link_is_new,
1464             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1465             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1466             'tags' => $LINKSDB->linksCountPerTag(),
1467             'default_private_links' => $conf->get('privacy.default_private_links', false),
1468         );
1469         $pluginManager->executeHooks('render_editlink', $data);
1470
1471         foreach ($data as $key => $value) {
1472             $PAGE->assign($key, $value);
1473         }
1474
1475         $PAGE->renderPage('editlink');
1476         exit;
1477     }
1478
1479     if ($targetPage == Router::$PAGE_EXPORT) {
1480         // Export links as a Netscape Bookmarks file
1481
1482         if (empty($_GET['selection'])) {
1483             $PAGE->renderPage('export');
1484             exit;
1485         }
1486
1487         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1488         $selection = $_GET['selection'];
1489         if (isset($_GET['prepend_note_url'])) {
1490             $prependNoteUrl = $_GET['prepend_note_url'];
1491         } else {
1492             $prependNoteUrl = false;
1493         }
1494
1495         try {
1496             $PAGE->assign(
1497                 'links',
1498                 NetscapeBookmarkUtils::filterAndFormat(
1499                     $LINKSDB,
1500                     $selection,
1501                     $prependNoteUrl,
1502                     index_url($_SERVER)
1503                 )
1504             );
1505         } catch (Exception $exc) {
1506             header('Content-Type: text/plain; charset=utf-8');
1507             echo $exc->getMessage();
1508             exit;
1509         }
1510         $now = new DateTime();
1511         header('Content-Type: text/html; charset=utf-8');
1512         header(
1513             'Content-disposition: attachment; filename=bookmarks_'
1514            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1515         );
1516         $PAGE->assign('date', $now->format(DateTime::RFC822));
1517         $PAGE->assign('eol', PHP_EOL);
1518         $PAGE->assign('selection', $selection);
1519         $PAGE->renderPage('export.bookmarks');
1520         exit;
1521     }
1522
1523     if ($targetPage == Router::$PAGE_IMPORT) {
1524         // Upload a Netscape bookmark dump to import its contents
1525
1526         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1527             // Show import dialog
1528             $PAGE->assign(
1529                 'maxfilesize',
1530                 get_max_upload_size(
1531                     ini_get('post_max_size'),
1532                     ini_get('upload_max_filesize'),
1533                     false
1534                 )
1535             );
1536             $PAGE->assign(
1537                 'maxfilesizeHuman',
1538                 get_max_upload_size(
1539                     ini_get('post_max_size'),
1540                     ini_get('upload_max_filesize'),
1541                     true
1542                 )
1543             );
1544             $PAGE->renderPage('import');
1545             exit;
1546         }
1547
1548         // Import bookmarks from an uploaded file
1549         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1550             // The file is too big or some form field may be missing.
1551             $msg = sprintf(
1552                 t(
1553                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1554                     .' (%s). Please upload in smaller chunks.'
1555                 ),
1556                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1557             );
1558             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1559             exit;
1560         }
1561         if (! $sessionManager->checkToken($_POST['token'])) {
1562             die('Wrong token.');
1563         }
1564         $status = NetscapeBookmarkUtils::import(
1565             $_POST,
1566             $_FILES,
1567             $LINKSDB,
1568             $conf,
1569             $history
1570         );
1571         echo '<script>alert("'.$status.'");document.location=\'?do='
1572              .Router::$PAGE_IMPORT .'\';</script>';
1573         exit;
1574     }
1575
1576     // Plugin administration page
1577     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1578         $pluginMeta = $pluginManager->getPluginsMeta();
1579
1580         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1581         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1582         // Load parameters.
1583         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1584         uasort(
1585             $enabledPlugins,
1586             function($a, $b) { return $a['order'] - $b['order']; }
1587         );
1588         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1589
1590         $PAGE->assign('enabledPlugins', $enabledPlugins);
1591         $PAGE->assign('disabledPlugins', $disabledPlugins);
1592         $PAGE->renderPage('pluginsadmin');
1593         exit;
1594     }
1595
1596     // Plugin administration form action
1597     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1598         try {
1599             if (isset($_POST['parameters_form'])) {
1600                 unset($_POST['parameters_form']);
1601                 foreach ($_POST as $param => $value) {
1602                     $conf->set('plugins.'. $param, escape($value));
1603                 }
1604             }
1605             else {
1606                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1607             }
1608             $conf->write(isLoggedIn());
1609             $history->updateSettings();
1610         }
1611         catch (Exception $e) {
1612             error_log(
1613                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1614                 $e->getMessage()
1615             );
1616
1617             // TODO: do not handle exceptions/errors in JS.
1618             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1619             exit;
1620         }
1621         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1622         exit;
1623     }
1624
1625     // Get a fresh token
1626     if ($targetPage == Router::$GET_TOKEN) {
1627         header('Content-Type:text/plain');
1628         echo $sessionManager->generateToken($conf);
1629         exit;
1630     }
1631
1632     // -------- Otherwise, simply display search form and links:
1633     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1634     exit;
1635 }
1636
1637 /**
1638  * Template for the list of links (<div id="linklist">)
1639  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1640  *
1641  * @param pageBuilder   $PAGE          pageBuilder instance.
1642  * @param LinkDB        $LINKSDB       LinkDB instance.
1643  * @param ConfigManager $conf          Configuration Manager instance.
1644  * @param PluginManager $pluginManager Plugin Manager instance.
1645  */
1646 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1647 {
1648     // Used in templates
1649     if (isset($_GET['searchtags'])) {
1650         if (! empty($_GET['searchtags'])) {
1651             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1652         } else {
1653             $searchtags = false;
1654         }
1655     } else {
1656         $searchtags = '';
1657     }
1658     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1659
1660     // Smallhash filter
1661     if (! empty($_SERVER['QUERY_STRING'])
1662         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1663         try {
1664             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1665         } catch (LinkNotFoundException $e) {
1666             $PAGE->render404($e->getMessage());
1667             exit;
1668         }
1669     } else {
1670         // Filter links according search parameters.
1671         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1672         $request = [
1673             'searchtags' => $searchtags,
1674             'searchterm' => $searchterm,
1675         ];
1676         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1677     }
1678
1679     // ---- Handle paging.
1680     $keys = array();
1681     foreach ($linksToDisplay as $key => $value) {
1682         $keys[] = $key;
1683     }
1684
1685
1686
1687     // Select articles according to paging.
1688     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1689     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1690     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1691     $page = $page < 1 ? 1 : $page;
1692     $page = $page > $pagecount ? $pagecount : $page;
1693     // Start index.
1694     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1695     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1696     $linkDisp = array();
1697     while ($i<$end && $i<count($keys))
1698     {
1699         $link = $linksToDisplay[$keys[$i]];
1700         $link['description'] = format_description(
1701             $link['description'],
1702             $conf->get('redirector.url'),
1703             $conf->get('redirector.encode_url')
1704         );
1705         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1706         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1707         $link['timestamp'] = $link['created']->getTimestamp();
1708         if (! empty($link['updated'])) {
1709             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1710         } else {
1711             $link['updated_timestamp'] = '';
1712         }
1713         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1714         uasort($taglist, 'strcasecmp');
1715         $link['taglist'] = $taglist;
1716         // Check for both signs of a note: starting with ? and 7 chars long.
1717         if ($link['url'][0] === '?' &&
1718             strlen($link['url']) === 7) {
1719             $link['url'] = index_url($_SERVER) . $link['url'];
1720         }
1721
1722         $linkDisp[$keys[$i]] = $link;
1723         $i++;
1724     }
1725
1726     // Compute paging navigation
1727     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1728     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1729     $previous_page_url = '';
1730     if ($i != count($keys)) {
1731         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1732     }
1733     $next_page_url='';
1734     if ($page>1) {
1735         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1736     }
1737
1738     // Fill all template fields.
1739     $data = array(
1740         'previous_page_url' => $previous_page_url,
1741         'next_page_url' => $next_page_url,
1742         'page_current' => $page,
1743         'page_max' => $pagecount,
1744         'result_count' => count($linksToDisplay),
1745         'search_term' => $searchterm,
1746         'search_tags' => $searchtags,
1747         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1748         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1749         'links' => $linkDisp,
1750     );
1751
1752     // If there is only a single link, we change on-the-fly the title of the page.
1753     if (count($linksToDisplay) == 1) {
1754         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1755     }
1756
1757     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1758
1759     foreach ($data as $key => $value) {
1760         $PAGE->assign($key, $value);
1761     }
1762
1763     return;
1764 }
1765
1766 /**
1767  * Compute the thumbnail for a link.
1768  *
1769  * With a link to the original URL.
1770  * Understands various services (youtube.com...)
1771  * Input: $url = URL for which the thumbnail must be found.
1772  *        $href = if provided, this URL will be followed instead of $url
1773  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1774  * Some of them may be missing.
1775  * Return an empty array if no thumbnail available.
1776  *
1777  * @param ConfigManager $conf Configuration Manager instance.
1778  * @param string        $url
1779  * @param string|bool   $href
1780  *
1781  * @return array
1782  */
1783 function computeThumbnail($conf, $url, $href = false)
1784 {
1785     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1786     if ($href==false) $href=$url;
1787
1788     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1789     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1790     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1791     $domain = parse_url($url,PHP_URL_HOST);
1792     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1793     {
1794         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1795         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1796                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1797     }
1798     if ($domain=='youtu.be') // Youtube short links
1799     {
1800         $path = parse_url($url,PHP_URL_PATH);
1801         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1802                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1803     }
1804     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1805     {
1806         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1807         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1808                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1809     }
1810
1811     if ($domain=='imgur.com')
1812     {
1813         $path = parse_url($url,PHP_URL_PATH);
1814         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1815         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1816                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1817         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1818                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1819
1820         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1821                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1822     }
1823     if ($domain=='i.imgur.com')
1824     {
1825         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1826         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1827                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1828     }
1829     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1830     {
1831         if (strpos($url,'dailymotion.com/video/')!==false)
1832         {
1833             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1834             return array('src'=>$thumburl,
1835                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1836         }
1837     }
1838     if (endsWith($domain,'.imageshack.us'))
1839     {
1840         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1841         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1842         {
1843             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1844             return array('src'=>$thumburl,
1845                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1846         }
1847     }
1848
1849     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1850     // So we deport the thumbnail generation in order not to slow down page generation
1851     // (and we also cache the thumbnail)
1852
1853     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1854
1855     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1856         || $domain=='vimeo.com'
1857         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1858         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1859     )
1860     {
1861         if ($domain=='vimeo.com')
1862         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1863             $path = parse_url($url,PHP_URL_PATH);
1864             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1865         }
1866         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1867         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1868             $path = parse_url($url,PHP_URL_PATH);
1869             if (!preg_match('!/\d+.+?!',$path)) return array();
1870         }
1871         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1872         {   // Make sure this TED URL points to a video (/talks/...)
1873             $path = parse_url($url,PHP_URL_PATH);
1874             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1875         }
1876         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1877         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1878                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1879     }
1880
1881     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1882     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1883     // But using the extension will do.
1884     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1885     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1886     {
1887         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1888         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1889                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1890     }
1891     return array(); // No thumbnail.
1892
1893 }
1894
1895
1896 // Returns the HTML code to display a thumbnail for a link
1897 // with a link to the original URL.
1898 // Understands various services (youtube.com...)
1899 // Input: $url = URL for which the thumbnail must be found.
1900 //        $href = if provided, this URL will be followed instead of $url
1901 // Returns '' if no thumbnail available.
1902 function thumbnail($url,$href=false)
1903 {
1904     // FIXME!
1905     global $conf;
1906     $t = computeThumbnail($conf, $url,$href);
1907     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1908
1909     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1910     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1911     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1912     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1913     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1914     $html.='></a>';
1915     return $html;
1916 }
1917
1918 // Returns the HTML code to display a thumbnail for a link
1919 // for the picture wall (using lazy image loading)
1920 // Understands various services (youtube.com...)
1921 // Input: $url = URL for which the thumbnail must be found.
1922 //        $href = if provided, this URL will be followed instead of $url
1923 // Returns '' if no thumbnail available.
1924 function lazyThumbnail($conf, $url,$href=false)
1925 {
1926     // FIXME!
1927     global $conf;
1928     $t = computeThumbnail($conf, $url,$href);
1929     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1930
1931     $html='<a href="'.escape($t['href']).'">';
1932
1933     // Lazy image
1934     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1935
1936     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1937     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1938     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1939     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1940     $html.='>';
1941
1942     // No-JavaScript fallback.
1943     $html.='<noscript><img src="'.escape($t['src']).'"';
1944     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1945     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1946     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1947     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1948     $html.='></noscript></a>';
1949
1950     return $html;
1951 }
1952
1953
1954 /**
1955  * Installation
1956  * This function should NEVER be called if the file data/config.php exists.
1957  *
1958  * @param ConfigManager  $conf           Configuration Manager instance.
1959  * @param SessionManager $sessionManager SessionManager instance
1960  */
1961 function install($conf, $sessionManager) {
1962     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1963     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1964
1965
1966     // This part makes sure sessions works correctly.
1967     // (Because on some hosts, session.save_path may not be set correctly,
1968     // or we may not have write access to it.)
1969     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1970     {
1971         // Step 2: Check if data in session is correct.
1972         $msg = t(
1973             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1974             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1975             'and that you have write access to it.<br>'.
1976             'It currently points to %s.<br>'.
1977             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1978             'or any custom hostname without a dot causes cookie storage to fail. '.
1979             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1980         );
1981         $msg = sprintf($msg, session_save_path());
1982         echo $msg;
1983         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1984         die;
1985     }
1986     if (!isset($_SESSION['session_tested']))
1987     {   // Step 1 : Try to store data in session and reload page.
1988         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1989         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1990     }
1991     if (isset($_GET['test_session']))
1992     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1993         header('Location: '.index_url($_SERVER));
1994     }
1995
1996
1997     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1998     {
1999         $tz = 'UTC';
2000         if (!empty($_POST['continent']) && !empty($_POST['city'])
2001             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2002         ) {
2003             $tz = $_POST['continent'].'/'.$_POST['city'];
2004         }
2005         $conf->set('general.timezone', $tz);
2006         $login = $_POST['setlogin'];
2007         $conf->set('credentials.login', $login);
2008         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2009         $conf->set('credentials.salt', $salt);
2010         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2011         if (!empty($_POST['title'])) {
2012             $conf->set('general.title', escape($_POST['title']));
2013         } else {
2014             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2015         }
2016         $conf->set('translation.language', escape($_POST['language']));
2017         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2018         $conf->set('api.enabled', !empty($_POST['enableApi']));
2019         $conf->set(
2020             'api.secret',
2021             generate_api_secret(
2022                 $conf->get('credentials.login'),
2023                 $conf->get('credentials.salt')
2024             )
2025         );
2026         try {
2027             // Everything is ok, let's create config file.
2028             $conf->write(isLoggedIn());
2029         }
2030         catch(Exception $e) {
2031             error_log(
2032                     'ERROR while writing config file after installation.' . PHP_EOL .
2033                     $e->getMessage()
2034                 );
2035
2036             // TODO: do not handle exceptions/errors in JS.
2037             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2038             exit;
2039         }
2040         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2041         exit;
2042     }
2043
2044     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2045     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2046     $PAGE->assign('continents', $continents);
2047     $PAGE->assign('cities', $cities);
2048     $PAGE->assign('languages', Languages::getAvailableLanguages());
2049     $PAGE->renderPage('install');
2050     exit;
2051 }
2052
2053 /**
2054  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2055  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2056  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2057  * This function is called by passing the URL:
2058  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2059  * [URL] is the URL of the link (e.g. a flickr page)
2060  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2061  * The function below will fetch the image from the webservice and store it in the cache.
2062  *
2063  * @param ConfigManager $conf Configuration Manager instance,
2064  */
2065 function genThumbnail($conf)
2066 {
2067     // Make sure the parameters in the URL were generated by us.
2068     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2069     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2070
2071     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2072     // Let's see if we don't already have the image for this URL in the cache.
2073     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2074     if (is_file($cacheDir .'/'. $thumbname))
2075     {   // We have the thumbnail, just serve it:
2076         header('Content-Type: image/jpeg');
2077         echo file_get_contents($cacheDir .'/'. $thumbname);
2078         return;
2079     }
2080     // We may also serve a blank image (if service did not respond)
2081     $blankname=hash('sha1',$_GET['url']).'.gif';
2082     if (is_file($cacheDir .'/'. $blankname))
2083     {
2084         header('Content-Type: image/gif');
2085         echo file_get_contents($cacheDir .'/'. $blankname);
2086         return;
2087     }
2088
2089     // Otherwise, generate the thumbnail.
2090     $url = $_GET['url'];
2091     $domain = parse_url($url,PHP_URL_HOST);
2092
2093     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2094     {
2095         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2096         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2097
2098         // Is this a link to an image, or to a flickr page ?
2099         $imageurl='';
2100         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2101         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2102             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2103             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2104         }
2105         else // This is a flickr page (html)
2106         {
2107             // Get the flickr html page.
2108             list($headers, $content) = get_http_response($url, 20);
2109             if (strpos($headers[0], '200 OK') !== false)
2110             {
2111                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2112                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2113                 if (!empty($matches[1])) $imageurl=$matches[1];
2114
2115                 // In albums (and some other pages), the link rel="image_src" is not provided,
2116                 // but flickr provides:
2117                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2118                 if ($imageurl=='')
2119                 {
2120                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2121                     if (!empty($matches[1])) $imageurl=$matches[1];
2122                 }
2123             }
2124         }
2125
2126         if ($imageurl!='')
2127         {   // Let's download the image.
2128             // Image is 240x120, so 10 seconds to download should be enough.
2129             list($headers, $content) = get_http_response($imageurl, 10);
2130             if (strpos($headers[0], '200 OK') !== false) {
2131                 // Save image to cache.
2132                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2133                 header('Content-Type: image/jpeg');
2134                 echo $content;
2135                 return;
2136             }
2137         }
2138     }
2139
2140     elseif ($domain=='vimeo.com' )
2141     {
2142         // This is more complex: we have to perform a HTTP request, then parse the result.
2143         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2144         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2145         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2146         if (strpos($headers[0], '200 OK') !== false) {
2147             $t = unserialize($content);
2148             $imageurl = $t[0]['thumbnail_medium'];
2149             // Then we download the image and serve it to our client.
2150             list($headers, $content) = get_http_response($imageurl, 10);
2151             if (strpos($headers[0], '200 OK') !== false) {
2152                 // Save image to cache.
2153                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2154                 header('Content-Type: image/jpeg');
2155                 echo $content;
2156                 return;
2157             }
2158         }
2159     }
2160
2161     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2162     {
2163         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2164         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2165         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2166         list($headers, $content) = get_http_response($url, 5);
2167         if (strpos($headers[0], '200 OK') !== false) {
2168             // Extract the link to the thumbnail
2169             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2170             if (!empty($matches[1]))
2171             {   // Let's download the image.
2172                 $imageurl=$matches[1];
2173                 // No control on image size, so wait long enough
2174                 list($headers, $content) = get_http_response($imageurl, 20);
2175                 if (strpos($headers[0], '200 OK') !== false) {
2176                     $filepath = $cacheDir .'/'. $thumbname;
2177                     file_put_contents($filepath, $content); // Save image to cache.
2178                     if (resizeImage($filepath))
2179                     {
2180                         header('Content-Type: image/jpeg');
2181                         echo file_get_contents($filepath);
2182                         return;
2183                     }
2184                 }
2185             }
2186         }
2187     }
2188
2189     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2190     {
2191         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2192         // http://xkcd.com/327/
2193         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2194         list($headers, $content) = get_http_response($url, 5);
2195         if (strpos($headers[0], '200 OK') !== false) {
2196             // Extract the link to the thumbnail
2197             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2198             if (!empty($matches[1]))
2199             {   // Let's download the image.
2200                 $imageurl=$matches[1];
2201                 // No control on image size, so wait long enough
2202                 list($headers, $content) = get_http_response($imageurl, 20);
2203                 if (strpos($headers[0], '200 OK') !== false) {
2204                     $filepath = $cacheDir.'/'.$thumbname;
2205                     // Save image to cache.
2206                     file_put_contents($filepath, $content);
2207                     if (resizeImage($filepath))
2208                     {
2209                         header('Content-Type: image/jpeg');
2210                         echo file_get_contents($filepath);
2211                         return;
2212                     }
2213                 }
2214             }
2215         }
2216     }
2217
2218     else
2219     {
2220         // For all other domains, we try to download the image and make a thumbnail.
2221         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2222         list($headers, $content) = get_http_response($url, 30);
2223         if (strpos($headers[0], '200 OK') !== false) {
2224             $filepath = $cacheDir .'/'.$thumbname;
2225             // Save image to cache.
2226             file_put_contents($filepath, $content);
2227             if (resizeImage($filepath))
2228             {
2229                 header('Content-Type: image/jpeg');
2230                 echo file_get_contents($filepath);
2231                 return;
2232             }
2233         }
2234     }
2235
2236
2237     // Otherwise, return an empty image (8x8 transparent gif)
2238     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2239     // Also put something in cache so that this URL is not requested twice.
2240     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2241     header('Content-Type: image/gif');
2242     echo $blankgif;
2243 }
2244
2245 // Make a thumbnail of the image (to width: 120 pixels)
2246 // Returns true if success, false otherwise.
2247 function resizeImage($filepath)
2248 {
2249     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2250
2251     // Trick: some stupid people rename GIF as JPEG... or else.
2252     // So we really try to open each image type whatever the extension is.
2253     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2254     $im=false;
2255     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2256     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2257     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2258     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2259     $w = imagesx($im);
2260     $h = imagesy($im);
2261     $ystart = 0; $yheight=$h;
2262     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2263     $nw = 120;   // Desired width
2264     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2265     // Resize image:
2266     $im2 = imagecreatetruecolor($nw,$nh);
2267     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2268     imageinterlace($im2,true); // For progressive JPEG.
2269     $tempname=$filepath.'_TEMP.jpg';
2270     imagejpeg($im2, $tempname, 90);
2271     imagedestroy($im);
2272     imagedestroy($im2);
2273     unlink($filepath);
2274     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2275     return true;
2276 }
2277
2278 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2279 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2280 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2281     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2282 }
2283
2284 try {
2285     $history = new History($conf->get('resource.history'));
2286 } catch(Exception $e) {
2287     die($e->getMessage());
2288 }
2289
2290 $linkDb = new LinkDB(
2291     $conf->get('resource.datastore'),
2292     isLoggedIn(),
2293     $conf->get('privacy.hide_public_links'),
2294     $conf->get('redirector.url'),
2295     $conf->get('redirector.encode_url')
2296 );
2297
2298 $container = new \Slim\Container();
2299 $container['conf'] = $conf;
2300 $container['plugins'] = $pluginManager;
2301 $container['history'] = $history;
2302 $app = new \Slim\App($container);
2303
2304 // REST API routes
2305 $app->group('/api/v1', function() {
2306     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2307     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2308     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2309     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2310     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2311     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2312     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2313 })->add('\Shaarli\Api\ApiMiddleware');
2314
2315 $response = $app->run(true);
2316 // Hack to make Slim and Shaarli router work together:
2317 // If a Slim route isn't found and NOT API call, we call renderPage().
2318 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2319     // We use UTF-8 for proper international characters handling.
2320     header('Content-Type: text/html; charset=utf-8');
2321     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2322 } else {
2323     $app->respond($response);
2324 }