index.php

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