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, $conf);
 126
 127 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 128 if (! defined('LC_MESSAGES')) {
 129     define('LC_MESSAGES', LC_COLLATE);
 130 }
 131
 132 // Sniff browser language and set date format accordingly.
 133 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 134     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 135 }
 136
 137 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 138
 139 $conf->setEmpty('general.timezone', date_default_timezone_get());
 140 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 141 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 142 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 143
 144 $pluginManager = new PluginManager($conf);
 145 $pluginManager->load($conf->get('general.enabled_plugins'));
 146
 147 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 148
 149 ob_start();  // Output buffering for the page cache.
 150
 151 // Prevent caching on client side or proxy: (yes, it's ugly)
 152 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 153 header("Cache-Control: no-store, no-cache, must-revalidate");
 154 header("Cache-Control: post-check=0, pre-check=0", false);
 155 header("Pragma: no-cache");
 156
 157 if (! is_file($conf->getConfigFileExt())) {
 158     // Ensure Shaarli has proper access to its resources
 159     $errors = ApplicationUtils::checkResourcePermissions($conf);
 160
 161     if ($errors != array()) {
 162         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 163
 164         foreach ($errors as $error) {
 165             $message .= '<li>'.$error.'</li>';
 166         }
 167         $message .= '</ul>';
 168
 169         header('Content-Type: text/html; charset=utf-8');
 170         echo $message;
 171         exit;
 172     }
 173
 174     // Display the installation form if no existing config is found
 175     install($conf, $sessionManager);
 176 }
 177
 178 // a token depending of deployment salt, user password, and the current ip
 179 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 180
 181 /**
 182  * Checking session state (i.e. is the user still logged in)
 183  *
 184  * @param ConfigManager $conf The configuration manager.
 185  *
 186  * @return bool: true if the user is logged in, false otherwise.
 187  */
 188 function setup_login_state($conf)
 189 {
 190     if ($conf->get('security.open_shaarli')) {
 191         return true;
 192     }
 193     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 194     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 195     if (! $conf->exists('credentials.login')) {
 196         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 197         $loginFailure = true;
 198     }
 199     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 200         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 201         !$loginFailure)
 202     {
 203         fillSessionInfo($conf);
 204         $userIsLoggedIn = true;
 205     }
 206     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 207     if (empty($_SESSION['uid'])
 208         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 209         || time() >= $_SESSION['expires_on'])
 210     {
 211         logout();
 212         $userIsLoggedIn = false;
 213         $loginFailure = true;
 214     }
 215     if (!empty($_SESSION['longlastingsession'])) {
 216         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 217     }
 218     else {
 219         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 220     }
 221     if (!$loginFailure) {
 222         $userIsLoggedIn = true;
 223     }
 224
 225     return $userIsLoggedIn;
 226 }
 227 $userIsLoggedIn = setup_login_state($conf);
 228
 229 // ------------------------------------------------------------------------------------------
 230 // Session management
 231
 232 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 233 function allIPs()
 234 {
 235     $ip = $_SERVER['REMOTE_ADDR'];
 236     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 237     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 238     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 239     return $ip;
 240 }
 241
 242 /**
 243  * Load user session.
 244  *
 245  * @param ConfigManager $conf Configuration Manager instance.
 246  */
 247 function fillSessionInfo($conf)
 248 {
 249     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 250     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 251     $_SESSION['username']= $conf->get('credentials.login');
 252     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 253 }
 254
 255 /**
 256  * Check that user/password is correct.
 257  *
 258  * @param string        $login    Username
 259  * @param string        $password User password
 260  * @param ConfigManager $conf     Configuration Manager instance.
 261  *
 262  * @return bool: authentication successful or not.
 263  */
 264 function check_auth($login, $password, $conf)
 265 {
 266     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 267     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 268     {   // Login/password is correct.
 269         fillSessionInfo($conf);
 270         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 271         return true;
 272     }
 273     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 274     return false;
 275 }
 276
 277 // Returns true if the user is logged in.
 278 function isLoggedIn()
 279 {
 280     global $userIsLoggedIn;
 281     return $userIsLoggedIn;
 282 }
 283
 284 // Force logout.
 285 function logout() {
 286     if (isset($_SESSION)) {
 287         unset($_SESSION['uid']);
 288         unset($_SESSION['ip']);
 289         unset($_SESSION['username']);
 290         unset($_SESSION['visibility']);
 291         unset($_SESSION['untaggedonly']);
 292     }
 293     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 294 }
 295
 296
 297 // ------------------------------------------------------------------------------------------
 298 // Brute force protection system
 299 // Several consecutive failed logins will ban the IP address for 30 minutes.
 300 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 301     // FIXME! globals
 302     file_put_contents(
 303         $conf->get('resource.ban_file', 'data/ipbans.php'),
 304         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 305     );
 306 }
 307 include $conf->get('resource.ban_file', 'data/ipbans.php');
 308 /**
 309  * Signal a failed login. Will ban the IP if too many failures:
 310  *
 311  * @param ConfigManager $conf Configuration Manager instance.
 312  */
 313 function ban_loginFailed($conf)
 314 {
 315     $ip = $_SERVER['REMOTE_ADDR'];
 316     $trusted = $conf->get('security.trusted_proxies', array());
 317     if (in_array($ip, $trusted)) {
 318         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 319         if (!$ip) {
 320             return;
 321         }
 322     }
 323     $gb = $GLOBALS['IPBANS'];
 324     if (! isset($gb['FAILURES'][$ip])) {
 325         $gb['FAILURES'][$ip]=0;
 326     }
 327     $gb['FAILURES'][$ip]++;
 328     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 329     {
 330         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 331         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 332     }
 333     $GLOBALS['IPBANS'] = $gb;
 334     file_put_contents(
 335         $conf->get('resource.ban_file', 'data/ipbans.php'),
 336         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 337     );
 338 }
 339
 340 /**
 341  * Signals a successful login. Resets failed login counter.
 342  *
 343  * @param ConfigManager $conf Configuration Manager instance.
 344  */
 345 function ban_loginOk($conf)
 346 {
 347     $ip = $_SERVER['REMOTE_ADDR'];
 348     $gb = $GLOBALS['IPBANS'];
 349     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 350     $GLOBALS['IPBANS'] = $gb;
 351     file_put_contents(
 352         $conf->get('resource.ban_file', 'data/ipbans.php'),
 353         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 354     );
 355 }
 356
 357 /**
 358  * Checks if the user CAN login. If 'true', the user can try to login.
 359  *
 360  * @param ConfigManager $conf Configuration Manager instance.
 361  *
 362  * @return bool: true if the user is allowed to login.
 363  */
 364 function ban_canLogin($conf)
 365 {
 366     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 367     if (isset($gb['BANS'][$ip]))
 368     {
 369         // User is banned. Check if the ban has expired:
 370         if ($gb['BANS'][$ip]<=time())
 371         {   // Ban expired, user can try to login again.
 372             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 373             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 374             file_put_contents(
 375                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 376                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 377             );
 378             return true; // Ban has expired, user can login.
 379         }
 380         return false; // User is banned.
 381     }
 382     return true; // User is not banned.
 383 }
 384
 385 // ------------------------------------------------------------------------------------------
 386 // Process login form: Check if login/password is correct.
 387 if (isset($_POST['login']))
 388 {
 389     if (!ban_canLogin($conf)) die(t('I said: NO. You are banned for the moment. Go away.'));
 390     if (isset($_POST['password'])
 391         && $sessionManager->checkToken($_POST['token'])
 392         && (check_auth($_POST['login'], $_POST['password'], $conf))
 393     ) {   // Login/password is OK.
 394         ban_loginOk($conf);
 395         // If user wants to keep the session cookie even after the browser closes:
 396         if (!empty($_POST['longlastingsession']))
 397         {
 398             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 399             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 400             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 401             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 402
 403             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 404             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 405             // Note: Never forget the trailing slash on the cookie path!
 406             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 407         }
 408         else // Standard session expiration (=when browser closes)
 409         {
 410             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 411             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 412             session_regenerate_id(true);
 413         }
 414
 415         // Optional redirect after login:
 416         if (isset($_GET['post'])) {
 417             $uri = '?post='. urlencode($_GET['post']);
 418             foreach (array('description', 'source', 'title', 'tags') as $param) {
 419                 if (!empty($_GET[$param])) {
 420                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 421                 }
 422             }
 423             header('Location: '. $uri);
 424             exit;
 425         }
 426
 427         if (isset($_GET['edit_link'])) {
 428             header('Location: ?edit_link='. escape($_GET['edit_link']));
 429             exit;
 430         }
 431
 432         if (isset($_POST['returnurl'])) {
 433             // Prevent loops over login screen.
 434             if (strpos($_POST['returnurl'], 'do=login') === false) {
 435                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 436                 exit;
 437             }
 438         }
 439         header('Location: ?'); exit;
 440     }
 441     else
 442     {
 443         ban_loginFailed($conf);
 444         $redir = '&username='. urlencode($_POST['login']);
 445         if (isset($_GET['post'])) {
 446             $redir .= '&post=' . urlencode($_GET['post']);
 447             foreach (array('description', 'source', 'title', 'tags') as $param) {
 448                 if (!empty($_GET[$param])) {
 449                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 450                 }
 451             }
 452         }
 453         // Redirect to login screen.
 454         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 455         exit;
 456     }
 457 }
 458
 459 // ------------------------------------------------------------------------------------------
 460 // Token management for XSRF protection
 461 // Token should be used in any form which acts on data (create,update,delete,import...).
 462 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 463
 464 /**
 465  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 466  * Gives the last 7 days (which have links).
 467  * This RSS feed cannot be filtered.
 468  *
 469  * @param ConfigManager $conf Configuration Manager instance.
 470  */
 471 function showDailyRSS($conf) {
 472     // Cache system
 473     $query = $_SERVER['QUERY_STRING'];
 474     $cache = new CachedPage(
 475         $conf->get('config.PAGE_CACHE'),
 476         page_url($_SERVER),
 477         startsWith($query,'do=dailyrss') && !isLoggedIn()
 478     );
 479     $cached = $cache->cachedVersion();
 480     if (!empty($cached)) {
 481         echo $cached;
 482         exit;
 483     }
 484
 485     // If cached was not found (or not usable), then read the database and build the response:
 486     // Read links from database (and filter private links if used it not logged in).
 487     $LINKSDB = new LinkDB(
 488         $conf->get('resource.datastore'),
 489         isLoggedIn(),
 490         $conf->get('privacy.hide_public_links'),
 491         $conf->get('redirector.url'),
 492         $conf->get('redirector.encode_url')
 493     );
 494
 495     /* Some Shaarlies may have very few links, so we need to look
 496        back in time until we have enough days ($nb_of_days).
 497     */
 498     $nb_of_days = 7; // We take 7 days.
 499     $today = date('Ymd');
 500     $days = array();
 501
 502     foreach ($LINKSDB as $link) {
 503         $day = $link['created']->format('Ymd'); // Extract day (without time)
 504         if (strcmp($day, $today) < 0) {
 505             if (empty($days[$day])) {
 506                 $days[$day] = array();
 507             }
 508             $days[$day][] = $link;
 509         }
 510
 511         if (count($days) > $nb_of_days) {
 512             break; // Have we collected enough days?
 513         }
 514     }
 515
 516     // Build the RSS feed.
 517     header('Content-Type: application/rss+xml; charset=utf-8');
 518     $pageaddr = escape(index_url($_SERVER));
 519     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 520     echo '<channel>';
 521     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 522     echo '<link>'. $pageaddr .'</link>';
 523     echo '<description>Daily shared links</description>';
 524     echo '<language>en-en</language>';
 525     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 526
 527     // For each day.
 528     foreach ($days as $day => $links) {
 529         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 530         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 531
 532         // We pre-format some fields for proper output.
 533         foreach ($links as &$link) {
 534             $link['formatedDescription'] = format_description(
 535                 $link['description'],
 536                 $conf->get('redirector.url'),
 537                 $conf->get('redirector.encode_url')
 538             );
 539             $link['thumbnail'] = thumbnail($conf, $link['url']);
 540             $link['timestamp'] = $link['created']->getTimestamp();
 541             if (startsWith($link['url'], '?')) {
 542                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 543             }
 544         }
 545
 546         // Then build the HTML for this day:
 547         $tpl = new RainTPL;
 548         $tpl->assign('title', $conf->get('general.title'));
 549         $tpl->assign('daydate', $dayDate->getTimestamp());
 550         $tpl->assign('absurl', $absurl);
 551         $tpl->assign('links', $links);
 552         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 553         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 554         $html = $tpl->draw('dailyrss', true);
 555
 556         echo $html . PHP_EOL;
 557     }
 558     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 559
 560     $cache->cache(ob_get_contents());
 561     ob_end_flush();
 562     exit;
 563 }
 564
 565 /**
 566  * Show the 'Daily' page.
 567  *
 568  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 569  * @param LinkDB        $LINKSDB       LinkDB instance.
 570  * @param ConfigManager $conf          Configuration Manager instance.
 571  * @param PluginManager $pluginManager Plugin Manager instane.
 572  */
 573 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 574 {
 575     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 576     if (isset($_GET['day'])) {
 577       $day = $_GET['day'];
 578     }
 579
 580     $days = $LINKSDB->days();
 581     $i = array_search($day, $days);
 582     if ($i === false && count($days)) {
 583         // no links for day, but at least one day with links
 584         $i = count($days) - 1;
 585         $day = $days[$i];
 586     }
 587     $previousday = '';
 588     $nextday = '';
 589
 590     if ($i !== false) {
 591         if ($i >= 1) {
 592              $previousday=$days[$i - 1];
 593         }
 594         if ($i < count($days) - 1) {
 595           $nextday = $days[$i + 1];
 596         }
 597     }
 598     try {
 599         $linksToDisplay = $LINKSDB->filterDay($day);
 600     } catch (Exception $exc) {
 601         error_log($exc);
 602         $linksToDisplay = array();
 603     }
 604
 605     // We pre-format some fields for proper output.
 606     foreach($linksToDisplay as $key => $link) {
 607         $taglist = explode(' ',$link['tags']);
 608         uasort($taglist, 'strcasecmp');
 609         $linksToDisplay[$key]['taglist']=$taglist;
 610         $linksToDisplay[$key]['formatedDescription'] = format_description(
 611             $link['description'],
 612             $conf->get('redirector.url'),
 613             $conf->get('redirector.encode_url')
 614         );
 615         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 616         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 617     }
 618
 619     /* We need to spread the articles on 3 columns.
 620        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 621        so I manually spread entries with a simple method: I roughly evaluate the
 622        height of a div according to title and description length.
 623     */
 624     $columns = array(array(), array(), array()); // Entries to display, for each column.
 625     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 626     foreach($linksToDisplay as $key => $link) {
 627         // Roughly estimate length of entry (by counting characters)
 628         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 629         // Description: 836 characters gives roughly 342 pixel height.
 630         // This is not perfect, but it's usually OK.
 631         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 632         if ($link['thumbnail']) {
 633           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 634         }
 635         // Then put in column which is the less filled:
 636         $smallest = min($fill); // find smallest value in array.
 637         $index = array_search($smallest, $fill); // find index of this smallest value.
 638         array_push($columns[$index], $link); // Put entry in this column.
 639         $fill[$index] += $length;
 640     }
 641
 642     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 643     $data = array(
 644         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 645         'linksToDisplay' => $linksToDisplay,
 646         'cols' => $columns,
 647         'day' => $dayDate->getTimestamp(),
 648         'dayDate' => $dayDate,
 649         'previousday' => $previousday,
 650         'nextday' => $nextday,
 651     );
 652
 653     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 654
 655     foreach ($data as $key => $value) {
 656         $pageBuilder->assign($key, $value);
 657     }
 658
 659     $pageBuilder->renderPage('daily');
 660     exit;
 661 }
 662
 663 /**
 664  * Renders the linklist
 665  *
 666  * @param pageBuilder   $PAGE    pageBuilder instance.
 667  * @param LinkDB        $LINKSDB LinkDB instance.
 668  * @param ConfigManager $conf    Configuration Manager instance.
 669  * @param PluginManager $pluginManager Plugin Manager instance.
 670  */
 671 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 672     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 673     $PAGE->renderPage('linklist');
 674 }
 675
 676 /**
 677  * Render HTML page (according to URL parameters and user rights)
 678  *
 679  * @param ConfigManager  $conf           Configuration Manager instance.
 680  * @param PluginManager  $pluginManager  Plugin Manager instance,
 681  * @param LinkDB         $LINKSDB
 682  * @param History        $history        instance
 683  * @param SessionManager $sessionManager SessionManager instance
 684  */
 685 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager)
 686 {
 687     $updater = new Updater(
 688         read_updates_file($conf->get('resource.updates')),
 689         $LINKSDB,
 690         $conf,
 691         isLoggedIn()
 692     );
 693     try {
 694         $newUpdates = $updater->update();
 695         if (! empty($newUpdates)) {
 696             write_updates_file(
 697                 $conf->get('resource.updates'),
 698                 $updater->getDoneUpdates()
 699             );
 700         }
 701     }
 702     catch(Exception $e) {
 703         die($e->getMessage());
 704     }
 705
 706     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 707     $PAGE->assign('linkcount', count($LINKSDB));
 708     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 709     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 710
 711     // Determine which page will be rendered.
 712     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 713     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 714
 715     if (
 716         // if the user isn't logged in
 717         !isLoggedIn() &&
 718         // and Shaarli doesn't have public content...
 719         $conf->get('privacy.hide_public_links') &&
 720         // and is configured to enforce the login
 721         $conf->get('privacy.force_login') &&
 722         // and the current page isn't already the login page
 723         $targetPage !== Router::$PAGE_LOGIN &&
 724         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 725         $targetPage !== Router::$PAGE_FEED_ATOM &&
 726         $targetPage !== Router::$PAGE_FEED_RSS
 727     ) {
 728         // force current page to be the login page
 729         $targetPage = Router::$PAGE_LOGIN;
 730     }
 731
 732     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 733     // Then assign generated data to RainTPL.
 734     $common_hooks = array(
 735         'includes',
 736         'header',
 737         'footer',
 738     );
 739
 740     foreach($common_hooks as $name) {
 741         $plugin_data = array();
 742         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 743             array(
 744                 'target' => $targetPage,
 745                 'loggedin' => isLoggedIn()
 746             )
 747         );
 748         $PAGE->assign('plugins_' . $name, $plugin_data);
 749     }
 750
 751     // -------- Display login form.
 752     if ($targetPage == Router::$PAGE_LOGIN)
 753     {
 754         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 755         if (isset($_GET['username'])) {
 756             $PAGE->assign('username', escape($_GET['username']));
 757         }
 758         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 759         // add default state of the 'remember me' checkbox
 760         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 761         $PAGE->renderPage('loginform');
 762         exit;
 763     }
 764     // -------- User wants to logout.
 765     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 766     {
 767         invalidateCaches($conf->get('resource.page_cache'));
 768         logout();
 769         header('Location: ?');
 770         exit;
 771     }
 772
 773     // -------- Picture wall
 774     if ($targetPage == Router::$PAGE_PICWALL)
 775     {
 776         // Optionally filter the results:
 777         $links = $LINKSDB->filterSearch($_GET);
 778         $linksToDisplay = array();
 779
 780         // Get only links which have a thumbnail.
 781         foreach($links as $link)
 782         {
 783             $permalink='?'.$link['shorturl'];
 784             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 785             if ($thumb!='') // Only output links which have a thumbnail.
 786             {
 787                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 788                 $linksToDisplay[]=$link; // Add to array.
 789             }
 790         }
 791
 792         $data = array(
 793             'linksToDisplay' => $linksToDisplay,
 794         );
 795         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 796
 797         foreach ($data as $key => $value) {
 798             $PAGE->assign($key, $value);
 799         }
 800
 801         $PAGE->renderPage('picwall');
 802         exit;
 803     }
 804
 805     // -------- Tag cloud
 806     if ($targetPage == Router::$PAGE_TAGCLOUD)
 807     {
 808         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 809         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 810         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 811
 812         // We sort tags alphabetically, then choose a font size according to count.
 813         // First, find max value.
 814         $maxcount = 0;
 815         foreach ($tags as $value) {
 816             $maxcount = max($maxcount, $value);
 817         }
 818
 819         alphabetical_sort($tags, false, true);
 820
 821         $tagList = array();
 822         foreach($tags as $key => $value) {
 823             if (in_array($key, $filteringTags)) {
 824                 continue;
 825             }
 826             // Tag font size scaling:
 827             //   default 15 and 30 logarithm bases affect scaling,
 828             //   22 and 6 are arbitrary font sizes for max and min sizes.
 829             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 830             $tagList[$key] = array(
 831                 'count' => $value,
 832                 'size' => number_format($size, 2, '.', ''),
 833             );
 834         }
 835
 836         $data = array(
 837             'search_tags' => implode(' ', escape($filteringTags)),
 838             'tags' => $tagList,
 839         );
 840         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 841
 842         foreach ($data as $key => $value) {
 843             $PAGE->assign($key, $value);
 844         }
 845
 846         $PAGE->renderPage('tag.cloud');
 847         exit;
 848     }
 849
 850     // -------- Tag list
 851     if ($targetPage == Router::$PAGE_TAGLIST)
 852     {
 853         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 854         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 855         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 856         foreach ($filteringTags as $tag) {
 857             if (array_key_exists($tag, $tags)) {
 858                 unset($tags[$tag]);
 859             }
 860         }
 861
 862         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 863             alphabetical_sort($tags, false, true);
 864         }
 865
 866         $data = [
 867             'search_tags' => implode(' ', escape($filteringTags)),
 868             'tags' => $tags,
 869         ];
 870         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 871
 872         foreach ($data as $key => $value) {
 873             $PAGE->assign($key, $value);
 874         }
 875
 876         $PAGE->renderPage('tag.list');
 877         exit;
 878     }
 879
 880     // Daily page.
 881     if ($targetPage == Router::$PAGE_DAILY) {
 882         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 883     }
 884
 885     // ATOM and RSS feed.
 886     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 887         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 888         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 889
 890         // Cache system
 891         $query = $_SERVER['QUERY_STRING'];
 892         $cache = new CachedPage(
 893             $conf->get('resource.page_cache'),
 894             page_url($_SERVER),
 895             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 896         );
 897         $cached = $cache->cachedVersion();
 898         if (!empty($cached)) {
 899             echo $cached;
 900             exit;
 901         }
 902
 903         // Generate data.
 904         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 905         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 906         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 907         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 908         $data = $feedGenerator->buildData();
 909
 910         // Process plugin hook.
 911         $pluginManager->executeHooks('render_feed', $data, array(
 912             'loggedin' => isLoggedIn(),
 913             'target' => $targetPage,
 914         ));
 915
 916         // Render the template.
 917         $PAGE->assignAll($data);
 918         $PAGE->renderPage('feed.'. $feedType);
 919         $cache->cache(ob_get_contents());
 920         ob_end_flush();
 921         exit;
 922     }
 923
 924     // Display opensearch plugin (XML)
 925     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 926         header('Content-Type: application/xml; charset=utf-8');
 927         $PAGE->assign('serverurl', index_url($_SERVER));
 928         $PAGE->renderPage('opensearch');
 929         exit;
 930     }
 931
 932     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 933     if (isset($_GET['addtag']))
 934     {
 935         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 936         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 937         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 938
 939         // Prevent redirection loop
 940         if (isset($params['addtag'])) {
 941             unset($params['addtag']);
 942         }
 943
 944         // Check if this tag is already in the search query and ignore it if it is.
 945         // Each tag is always separated by a space
 946         if (isset($params['searchtags'])) {
 947             $current_tags = explode(' ', $params['searchtags']);
 948         } else {
 949             $current_tags = array();
 950         }
 951         $addtag = true;
 952         foreach ($current_tags as $value) {
 953             if ($value === $_GET['addtag']) {
 954                 $addtag = false;
 955                 break;
 956             }
 957         }
 958         // Append the tag if necessary
 959         if (empty($params['searchtags'])) {
 960             $params['searchtags'] = trim($_GET['addtag']);
 961         }
 962         else if ($addtag) {
 963             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 964         }
 965
 966         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 967         header('Location: ?'.http_build_query($params));
 968         exit;
 969     }
 970
 971     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 972     if (isset($_GET['removetag'])) {
 973         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 974         if (empty($_SERVER['HTTP_REFERER'])) {
 975             header('Location: ?');
 976             exit;
 977         }
 978
 979         // In case browser does not send HTTP_REFERER
 980         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 981
 982         // Prevent redirection loop
 983         if (isset($params['removetag'])) {
 984             unset($params['removetag']);
 985         }
 986
 987         if (isset($params['searchtags'])) {
 988             $tags = explode(' ', $params['searchtags']);
 989             // Remove value from array $tags.
 990             $tags = array_diff($tags, array($_GET['removetag']));
 991             $params['searchtags'] = implode(' ',$tags);
 992
 993             if (empty($params['searchtags'])) {
 994                 unset($params['searchtags']);
 995             }
 996
 997             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 998         }
 999         header('Location: ?'.http_build_query($params));
1000         exit;
1001     }
1002
1003     // -------- User wants to change the number of links per page (linksperpage=...)
1004     if (isset($_GET['linksperpage'])) {
1005         if (is_numeric($_GET['linksperpage'])) {
1006             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1007         }
1008
1009         if (! empty($_SERVER['HTTP_REFERER'])) {
1010             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1011         } else {
1012             $location = '?';
1013         }
1014         header('Location: '. $location);
1015         exit;
1016     }
1017
1018     // -------- User wants to see only private links (toggle)
1019     if (isset($_GET['visibility'])) {
1020         if ($_GET['visibility'] === 'private') {
1021             // Visibility not set or not already private, set private, otherwise reset it
1022             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
1023                 // See only private links
1024                 $_SESSION['visibility'] = 'private';
1025             } else {
1026                 unset($_SESSION['visibility']);
1027             }
1028         } else if ($_GET['visibility'] === 'public') {
1029             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
1030                 // See only public links
1031                 $_SESSION['visibility'] = 'public';
1032             } else {
1033                 unset($_SESSION['visibility']);
1034             }
1035         }
1036
1037         if (! empty($_SERVER['HTTP_REFERER'])) {
1038             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
1039         } else {
1040             $location = '?';
1041         }
1042         header('Location: '. $location);
1043         exit;
1044     }
1045
1046     // -------- User wants to see only untagged links (toggle)
1047     if (isset($_GET['untaggedonly'])) {
1048         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1049
1050         if (! empty($_SERVER['HTTP_REFERER'])) {
1051             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1052         } else {
1053             $location = '?';
1054         }
1055         header('Location: '. $location);
1056         exit;
1057     }
1058
1059     // -------- Handle other actions allowed for non-logged in users:
1060     if (!isLoggedIn())
1061     {
1062         // User tries to post new link but is not logged in:
1063         // Show login screen, then redirect to ?post=...
1064         if (isset($_GET['post']))
1065         {
1066             header( // Redirect to login page, then back to post link.
1067                 'Location: ?do=login&post='.urlencode($_GET['post']).
1068                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1069                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1070                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1071                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1072             );
1073             exit;
1074         }
1075
1076         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1077         if (isset($_GET['edit_link'])) {
1078             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1079             exit;
1080         }
1081
1082         exit; // Never remove this one! All operations below are reserved for logged in user.
1083     }
1084
1085     // -------- All other functions are reserved for the registered user:
1086
1087     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1088     if ($targetPage == Router::$PAGE_TOOLS)
1089     {
1090         $data = [
1091             'pageabsaddr' => index_url($_SERVER),
1092             'sslenabled' => is_https($_SERVER),
1093         ];
1094         $pluginManager->executeHooks('render_tools', $data);
1095
1096         foreach ($data as $key => $value) {
1097             $PAGE->assign($key, $value);
1098         }
1099
1100         $PAGE->renderPage('tools');
1101         exit;
1102     }
1103
1104     // -------- User wants to change his/her password.
1105     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1106     {
1107         if ($conf->get('security.open_shaarli')) {
1108             die(t('You are not supposed to change a password on an Open Shaarli.'));
1109         }
1110
1111         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1112         {
1113             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1114
1115             // Make sure old password is correct.
1116             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1117             if ($oldhash!= $conf->get('credentials.hash')) {
1118                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1119                 exit;
1120             }
1121             // Save new password
1122             // Salt renders rainbow-tables attacks useless.
1123             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1124             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1125             try {
1126                 $conf->write(isLoggedIn());
1127             }
1128             catch(Exception $e) {
1129                 error_log(
1130                     'ERROR while writing config file after changing password.' . PHP_EOL .
1131                     $e->getMessage()
1132                 );
1133
1134                 // TODO: do not handle exceptions/errors in JS.
1135                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1136                 exit;
1137             }
1138             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1139             exit;
1140         }
1141         else // show the change password form.
1142         {
1143             $PAGE->renderPage('changepassword');
1144             exit;
1145         }
1146     }
1147
1148     // -------- User wants to change configuration
1149     if ($targetPage == Router::$PAGE_CONFIGURE)
1150     {
1151         if (!empty($_POST['title']) )
1152         {
1153             if (!$sessionManager->checkToken($_POST['token'])) {
1154                 die(t('Wrong token.')); // Go away!
1155             }
1156             $tz = 'UTC';
1157             if (!empty($_POST['continent']) && !empty($_POST['city'])
1158                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1159             ) {
1160                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1161             }
1162             $conf->set('general.timezone', $tz);
1163             $conf->set('general.title', escape($_POST['title']));
1164             $conf->set('general.header_link', escape($_POST['titleLink']));
1165             $conf->set('resource.theme', escape($_POST['theme']));
1166             $conf->set('redirector.url', escape($_POST['redirector']));
1167             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1168             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1169             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1170             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1171             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1172             $conf->set('api.enabled', !empty($_POST['enableApi']));
1173             $conf->set('api.secret', escape($_POST['apiSecret']));
1174             $conf->set('translation.language', escape($_POST['language']));
1175
1176             try {
1177                 $conf->write(isLoggedIn());
1178                 $history->updateSettings();
1179                 invalidateCaches($conf->get('resource.page_cache'));
1180             }
1181             catch(Exception $e) {
1182                 error_log(
1183                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1184                     $e->getMessage()
1185                 );
1186
1187                 // TODO: do not handle exceptions/errors in JS.
1188                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1189                 exit;
1190             }
1191             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1192             exit;
1193         }
1194         else // Show the configuration form.
1195         {
1196             $PAGE->assign('title', $conf->get('general.title'));
1197             $PAGE->assign('theme', $conf->get('resource.theme'));
1198             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1199             $PAGE->assign('redirector', $conf->get('redirector.url'));
1200             list($continents, $cities) = generateTimeZoneData(
1201                 timezone_identifiers_list(),
1202                 $conf->get('general.timezone')
1203             );
1204             $PAGE->assign('continents', $continents);
1205             $PAGE->assign('cities', $cities);
1206             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1207             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1208             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1209             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1210             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1211             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1212             $PAGE->assign('api_secret', $conf->get('api.secret'));
1213             $PAGE->assign('languages', Languages::getAvailableLanguages());
1214             $PAGE->assign('language', $conf->get('translation.language'));
1215             $PAGE->renderPage('configure');
1216             exit;
1217         }
1218     }
1219
1220     // -------- User wants to rename a tag or delete it
1221     if ($targetPage == Router::$PAGE_CHANGETAG)
1222     {
1223         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1224             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1225             $PAGE->renderPage('changetag');
1226             exit;
1227         }
1228
1229         if (!$sessionManager->checkToken($_POST['token'])) {
1230             die(t('Wrong token.'));
1231         }
1232
1233         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1234         $LINKSDB->save($conf->get('resource.page_cache'));
1235         foreach ($alteredLinks as $link) {
1236             $history->updateLink($link);
1237         }
1238         $delete = empty($_POST['totag']);
1239         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1240         $count = count($alteredLinks);
1241         $alert = $delete
1242             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1243             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1244         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1245         exit;
1246     }
1247
1248     // -------- User wants to add a link without using the bookmarklet: Show form.
1249     if ($targetPage == Router::$PAGE_ADDLINK)
1250     {
1251         $PAGE->renderPage('addlink');
1252         exit;
1253     }
1254
1255     // -------- User clicked the "Save" button when editing a link: Save link to database.
1256     if (isset($_POST['save_edit']))
1257     {
1258         // Go away!
1259         if (! $sessionManager->checkToken($_POST['token'])) {
1260             die(t('Wrong token.'));
1261         }
1262
1263         // lf_id should only be present if the link exists.
1264         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1265         // Linkdate is kept here to:
1266         //   - use the same permalink for notes as they're displayed when creating them
1267         //   - let users hack creation date of their posts
1268         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1269         $linkdate = escape($_POST['lf_linkdate']);
1270         if (isset($LINKSDB[$id])) {
1271             // Edit
1272             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1273             $updated = new DateTime();
1274             $shortUrl = $LINKSDB[$id]['shorturl'];
1275             $new = false;
1276         } else {
1277             // New link
1278             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1279             $updated = null;
1280             $shortUrl = link_small_hash($created, $id);
1281             $new = true;
1282         }
1283
1284         // Remove multiple spaces.
1285         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1286         // Remove first '-' char in tags.
1287         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1288         // Remove duplicates.
1289         $tags = implode(' ', array_unique(explode(' ', $tags)));
1290
1291         if (empty(trim($_POST['lf_url']))) {
1292             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1293         }
1294         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1295
1296         $link = array(
1297             'id' => $id,
1298             'title' => trim($_POST['lf_title']),
1299             'url' => $url,
1300             'description' => $_POST['lf_description'],
1301             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1302             'created' => $created,
1303             'updated' => $updated,
1304             'tags' => str_replace(',', ' ', $tags),
1305             'shorturl' => $shortUrl,
1306         );
1307
1308         // If title is empty, use the URL as title.
1309         if ($link['title'] == '') {
1310             $link['title'] = $link['url'];
1311         }
1312
1313         $pluginManager->executeHooks('save_link', $link);
1314
1315         $LINKSDB[$id] = $link;
1316         $LINKSDB->save($conf->get('resource.page_cache'));
1317         if ($new) {
1318             $history->addLink($link);
1319         } else {
1320             $history->updateLink($link);
1321         }
1322
1323         // If we are called from the bookmarklet, we must close the popup:
1324         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1325             echo '<script>self.close();</script>';
1326             exit;
1327         }
1328
1329         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1330         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1331         // Scroll to the link which has been edited.
1332         $location .= '#' . $link['shorturl'];
1333         // After saving the link, redirect to the page the user was on.
1334         header('Location: '. $location);
1335         exit;
1336     }
1337
1338     // -------- User clicked the "Cancel" button when editing a link.
1339     if (isset($_POST['cancel_edit']))
1340     {
1341         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1342         if (! isset($LINKSDB[$id])) {
1343             header('Location: ?');
1344         }
1345         // If we are called from the bookmarklet, we must close the popup:
1346         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1347         $link = $LINKSDB[$id];
1348         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1349         // Scroll to the link which has been edited.
1350         $returnurl .= '#'. $link['shorturl'];
1351         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1352         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1353         exit;
1354     }
1355
1356     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1357     if ($targetPage == Router::$PAGE_DELETELINK)
1358     {
1359         if (! $sessionManager->checkToken($_GET['token'])) {
1360             die(t('Wrong token.'));
1361         }
1362
1363         $ids = trim($_GET['lf_linkdate']);
1364         if (strpos($ids, ' ') !== false) {
1365             // multiple, space-separated ids provided
1366             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1367         } else {
1368             // only a single id provided
1369             $ids = [$ids];
1370         }
1371         // assert at least one id is given
1372         if(!count($ids)){
1373             die('no id provided');
1374         }
1375         foreach ($ids as $id) {
1376             $id = (int) escape($id);
1377             $link = $LINKSDB[$id];
1378             $pluginManager->executeHooks('delete_link', $link);
1379             unset($LINKSDB[$id]);
1380         }
1381         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1382         $history->deleteLink($link);
1383
1384         // If we are called from the bookmarklet, we must close the popup:
1385         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1386
1387         $location = '?';
1388         if (isset($_SERVER['HTTP_REFERER'])) {
1389             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1390             $location = generateLocation(
1391                     $_SERVER['HTTP_REFERER'],
1392                     $_SERVER['HTTP_HOST'],
1393                     ['delete_link', 'edit_link', $link['shorturl']]
1394             );
1395         }
1396
1397         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1398         exit;
1399     }
1400
1401     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1402     if (isset($_GET['edit_link']))
1403     {
1404         $id = (int) escape($_GET['edit_link']);
1405         $link = $LINKSDB[$id];  // Read database
1406         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1407         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1408         $data = array(
1409             'link' => $link,
1410             'link_is_new' => false,
1411             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1412             'tags' => $LINKSDB->linksCountPerTag(),
1413         );
1414         $pluginManager->executeHooks('render_editlink', $data);
1415
1416         foreach ($data as $key => $value) {
1417             $PAGE->assign($key, $value);
1418         }
1419
1420         $PAGE->renderPage('editlink');
1421         exit;
1422     }
1423
1424     // -------- User want to post a new link: Display link edit form.
1425     if (isset($_GET['post'])) {
1426         $url = cleanup_url($_GET['post']);
1427
1428         $link_is_new = false;
1429         // Check if URL is not already in database (in this case, we will edit the existing link)
1430         $link = $LINKSDB->getLinkFromUrl($url);
1431         if (! $link)
1432         {
1433             $link_is_new = true;
1434             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1435             // Get title if it was provided in URL (by the bookmarklet).
1436             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1437             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1438             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1439             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1440             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1441             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1442             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1443                 // Short timeout to keep the application responsive
1444                 // The callback will fill $charset and $title with data from the downloaded page.
1445                 get_http_response($url, 25, 4194304, get_curl_download_callback($charset, $title));
1446                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1447                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1448                 }
1449             }
1450
1451             if ($url == '') {
1452                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1453                 $title = $conf->get('general.default_note_title', t('Note: '));
1454             }
1455             $url = escape($url);
1456             $title = escape($title);
1457
1458             $link = array(
1459                 'linkdate' => $linkdate,
1460                 'title' => $title,
1461                 'url' => $url,
1462                 'description' => $description,
1463                 'tags' => $tags,
1464                 'private' => $private,
1465             );
1466         } else {
1467             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1468         }
1469
1470         $data = array(
1471             'link' => $link,
1472             'link_is_new' => $link_is_new,
1473             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1474             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1475             'tags' => $LINKSDB->linksCountPerTag(),
1476             'default_private_links' => $conf->get('privacy.default_private_links', false),
1477         );
1478         $pluginManager->executeHooks('render_editlink', $data);
1479
1480         foreach ($data as $key => $value) {
1481             $PAGE->assign($key, $value);
1482         }
1483
1484         $PAGE->renderPage('editlink');
1485         exit;
1486     }
1487
1488     if ($targetPage == Router::$PAGE_EXPORT) {
1489         // Export links as a Netscape Bookmarks file
1490
1491         if (empty($_GET['selection'])) {
1492             $PAGE->renderPage('export');
1493             exit;
1494         }
1495
1496         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1497         $selection = $_GET['selection'];
1498         if (isset($_GET['prepend_note_url'])) {
1499             $prependNoteUrl = $_GET['prepend_note_url'];
1500         } else {
1501             $prependNoteUrl = false;
1502         }
1503
1504         try {
1505             $PAGE->assign(
1506                 'links',
1507                 NetscapeBookmarkUtils::filterAndFormat(
1508                     $LINKSDB,
1509                     $selection,
1510                     $prependNoteUrl,
1511                     index_url($_SERVER)
1512                 )
1513             );
1514         } catch (Exception $exc) {
1515             header('Content-Type: text/plain; charset=utf-8');
1516             echo $exc->getMessage();
1517             exit;
1518         }
1519         $now = new DateTime();
1520         header('Content-Type: text/html; charset=utf-8');
1521         header(
1522             'Content-disposition: attachment; filename=bookmarks_'
1523            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1524         );
1525         $PAGE->assign('date', $now->format(DateTime::RFC822));
1526         $PAGE->assign('eol', PHP_EOL);
1527         $PAGE->assign('selection', $selection);
1528         $PAGE->renderPage('export.bookmarks');
1529         exit;
1530     }
1531
1532     if ($targetPage == Router::$PAGE_IMPORT) {
1533         // Upload a Netscape bookmark dump to import its contents
1534
1535         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1536             // Show import dialog
1537             $PAGE->assign(
1538                 'maxfilesize',
1539                 get_max_upload_size(
1540                     ini_get('post_max_size'),
1541                     ini_get('upload_max_filesize'),
1542                     false
1543                 )
1544             );
1545             $PAGE->assign(
1546                 'maxfilesizeHuman',
1547                 get_max_upload_size(
1548                     ini_get('post_max_size'),
1549                     ini_get('upload_max_filesize'),
1550                     true
1551                 )
1552             );
1553             $PAGE->renderPage('import');
1554             exit;
1555         }
1556
1557         // Import bookmarks from an uploaded file
1558         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1559             // The file is too big or some form field may be missing.
1560             $msg = sprintf(
1561                 t(
1562                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1563                     .' (%s). Please upload in smaller chunks.'
1564                 ),
1565                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1566             );
1567             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1568             exit;
1569         }
1570         if (! $sessionManager->checkToken($_POST['token'])) {
1571             die('Wrong token.');
1572         }
1573         $status = NetscapeBookmarkUtils::import(
1574             $_POST,
1575             $_FILES,
1576             $LINKSDB,
1577             $conf,
1578             $history
1579         );
1580         echo '<script>alert("'.$status.'");document.location=\'?do='
1581              .Router::$PAGE_IMPORT .'\';</script>';
1582         exit;
1583     }
1584
1585     // Plugin administration page
1586     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1587         $pluginMeta = $pluginManager->getPluginsMeta();
1588
1589         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1590         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1591         // Load parameters.
1592         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1593         uasort(
1594             $enabledPlugins,
1595             function($a, $b) { return $a['order'] - $b['order']; }
1596         );
1597         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1598
1599         $PAGE->assign('enabledPlugins', $enabledPlugins);
1600         $PAGE->assign('disabledPlugins', $disabledPlugins);
1601         $PAGE->renderPage('pluginsadmin');
1602         exit;
1603     }
1604
1605     // Plugin administration form action
1606     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1607         try {
1608             if (isset($_POST['parameters_form'])) {
1609                 unset($_POST['parameters_form']);
1610                 foreach ($_POST as $param => $value) {
1611                     $conf->set('plugins.'. $param, escape($value));
1612                 }
1613             }
1614             else {
1615                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1616             }
1617             $conf->write(isLoggedIn());
1618             $history->updateSettings();
1619         }
1620         catch (Exception $e) {
1621             error_log(
1622                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1623                 $e->getMessage()
1624             );
1625
1626             // TODO: do not handle exceptions/errors in JS.
1627             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1628             exit;
1629         }
1630         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1631         exit;
1632     }
1633
1634     // Get a fresh token
1635     if ($targetPage == Router::$GET_TOKEN) {
1636         header('Content-Type:text/plain');
1637         echo $sessionManager->generateToken($conf);
1638         exit;
1639     }
1640
1641     // -------- Otherwise, simply display search form and links:
1642     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1643     exit;
1644 }
1645
1646 /**
1647  * Template for the list of links (<div id="linklist">)
1648  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1649  *
1650  * @param pageBuilder   $PAGE          pageBuilder instance.
1651  * @param LinkDB        $LINKSDB       LinkDB instance.
1652  * @param ConfigManager $conf          Configuration Manager instance.
1653  * @param PluginManager $pluginManager Plugin Manager instance.
1654  */
1655 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1656 {
1657     // Used in templates
1658     if (isset($_GET['searchtags'])) {
1659         if (! empty($_GET['searchtags'])) {
1660             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1661         } else {
1662             $searchtags = false;
1663         }
1664     } else {
1665         $searchtags = '';
1666     }
1667     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1668
1669     // Smallhash filter
1670     if (! empty($_SERVER['QUERY_STRING'])
1671         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1672         try {
1673             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1674         } catch (LinkNotFoundException $e) {
1675             $PAGE->render404($e->getMessage());
1676             exit;
1677         }
1678     } else {
1679         // Filter links according search parameters.
1680         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1681         $request = [
1682             'searchtags' => $searchtags,
1683             'searchterm' => $searchterm,
1684         ];
1685         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1686     }
1687
1688     // ---- Handle paging.
1689     $keys = array();
1690     foreach ($linksToDisplay as $key => $value) {
1691         $keys[] = $key;
1692     }
1693
1694
1695
1696     // Select articles according to paging.
1697     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1698     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1699     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1700     $page = $page < 1 ? 1 : $page;
1701     $page = $page > $pagecount ? $pagecount : $page;
1702     // Start index.
1703     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1704     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1705     $linkDisp = array();
1706     while ($i<$end && $i<count($keys))
1707     {
1708         $link = $linksToDisplay[$keys[$i]];
1709         $link['description'] = format_description(
1710             $link['description'],
1711             $conf->get('redirector.url'),
1712             $conf->get('redirector.encode_url')
1713         );
1714         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1715         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1716         $link['timestamp'] = $link['created']->getTimestamp();
1717         if (! empty($link['updated'])) {
1718             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1719         } else {
1720             $link['updated_timestamp'] = '';
1721         }
1722         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1723         uasort($taglist, 'strcasecmp');
1724         $link['taglist'] = $taglist;
1725         // Check for both signs of a note: starting with ? and 7 chars long.
1726         if ($link['url'][0] === '?' &&
1727             strlen($link['url']) === 7) {
1728             $link['url'] = index_url($_SERVER) . $link['url'];
1729         }
1730
1731         $linkDisp[$keys[$i]] = $link;
1732         $i++;
1733     }
1734
1735     // Compute paging navigation
1736     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1737     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1738     $previous_page_url = '';
1739     if ($i != count($keys)) {
1740         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1741     }
1742     $next_page_url='';
1743     if ($page>1) {
1744         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1745     }
1746
1747     // Fill all template fields.
1748     $data = array(
1749         'previous_page_url' => $previous_page_url,
1750         'next_page_url' => $next_page_url,
1751         'page_current' => $page,
1752         'page_max' => $pagecount,
1753         'result_count' => count($linksToDisplay),
1754         'search_term' => $searchterm,
1755         'search_tags' => $searchtags,
1756         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1757         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1758         'links' => $linkDisp,
1759     );
1760
1761     // If there is only a single link, we change on-the-fly the title of the page.
1762     if (count($linksToDisplay) == 1) {
1763         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1764     }
1765
1766     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1767
1768     foreach ($data as $key => $value) {
1769         $PAGE->assign($key, $value);
1770     }
1771
1772     return;
1773 }
1774
1775 /**
1776  * Compute the thumbnail for a link.
1777  *
1778  * With a link to the original URL.
1779  * Understands various services (youtube.com...)
1780  * Input: $url = URL for which the thumbnail must be found.
1781  *        $href = if provided, this URL will be followed instead of $url
1782  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1783  * Some of them may be missing.
1784  * Return an empty array if no thumbnail available.
1785  *
1786  * @param ConfigManager $conf Configuration Manager instance.
1787  * @param string        $url
1788  * @param string|bool   $href
1789  *
1790  * @return array
1791  */
1792 function computeThumbnail($conf, $url, $href = false)
1793 {
1794     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1795     if ($href==false) $href=$url;
1796
1797     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1798     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1799     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1800     $domain = parse_url($url,PHP_URL_HOST);
1801     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1802     {
1803         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1804         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1805                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1806     }
1807     if ($domain=='youtu.be') // Youtube short links
1808     {
1809         $path = parse_url($url,PHP_URL_PATH);
1810         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1811                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1812     }
1813     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1814     {
1815         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1816         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1817                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1818     }
1819
1820     if ($domain=='imgur.com')
1821     {
1822         $path = parse_url($url,PHP_URL_PATH);
1823         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1824         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1825                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1826         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1827                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1828
1829         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1830                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1831     }
1832     if ($domain=='i.imgur.com')
1833     {
1834         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1835         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1836                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1837     }
1838     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1839     {
1840         if (strpos($url,'dailymotion.com/video/')!==false)
1841         {
1842             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1843             return array('src'=>$thumburl,
1844                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1845         }
1846     }
1847     if (endsWith($domain,'.imageshack.us'))
1848     {
1849         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1850         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1851         {
1852             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1853             return array('src'=>$thumburl,
1854                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1855         }
1856     }
1857
1858     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1859     // So we deport the thumbnail generation in order not to slow down page generation
1860     // (and we also cache the thumbnail)
1861
1862     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1863
1864     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1865         || $domain=='vimeo.com'
1866         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1867         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1868     )
1869     {
1870         if ($domain=='vimeo.com')
1871         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1872             $path = parse_url($url,PHP_URL_PATH);
1873             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1874         }
1875         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1876         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1877             $path = parse_url($url,PHP_URL_PATH);
1878             if (!preg_match('!/\d+.+?!',$path)) return array();
1879         }
1880         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1881         {   // Make sure this TED URL points to a video (/talks/...)
1882             $path = parse_url($url,PHP_URL_PATH);
1883             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1884         }
1885         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1886         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1887                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1888     }
1889
1890     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1891     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1892     // But using the extension will do.
1893     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1894     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1895     {
1896         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1897         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1898                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1899     }
1900     return array(); // No thumbnail.
1901
1902 }
1903
1904
1905 // Returns the HTML code to display a thumbnail for a link
1906 // with a link to the original URL.
1907 // Understands various services (youtube.com...)
1908 // Input: $url = URL for which the thumbnail must be found.
1909 //        $href = if provided, this URL will be followed instead of $url
1910 // Returns '' if no thumbnail available.
1911 function thumbnail($url,$href=false)
1912 {
1913     // FIXME!
1914     global $conf;
1915     $t = computeThumbnail($conf, $url,$href);
1916     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1917
1918     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1919     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1920     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1921     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1922     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1923     $html.='></a>';
1924     return $html;
1925 }
1926
1927 // Returns the HTML code to display a thumbnail for a link
1928 // for the picture wall (using lazy image loading)
1929 // Understands various services (youtube.com...)
1930 // Input: $url = URL for which the thumbnail must be found.
1931 //        $href = if provided, this URL will be followed instead of $url
1932 // Returns '' if no thumbnail available.
1933 function lazyThumbnail($conf, $url,$href=false)
1934 {
1935     // FIXME!
1936     global $conf;
1937     $t = computeThumbnail($conf, $url,$href);
1938     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1939
1940     $html='<a href="'.escape($t['href']).'">';
1941
1942     // Lazy image
1943     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1944
1945     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1946     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1947     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1948     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1949     $html.='>';
1950
1951     // No-JavaScript fallback.
1952     $html.='<noscript><img src="'.escape($t['src']).'"';
1953     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1954     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1955     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1956     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1957     $html.='></noscript></a>';
1958
1959     return $html;
1960 }
1961
1962
1963 /**
1964  * Installation
1965  * This function should NEVER be called if the file data/config.php exists.
1966  *
1967  * @param ConfigManager  $conf           Configuration Manager instance.
1968  * @param SessionManager $sessionManager SessionManager instance
1969  */
1970 function install($conf, $sessionManager) {
1971     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1972     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1973
1974
1975     // This part makes sure sessions works correctly.
1976     // (Because on some hosts, session.save_path may not be set correctly,
1977     // or we may not have write access to it.)
1978     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1979     {
1980         // Step 2: Check if data in session is correct.
1981         $msg = t(
1982             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1983             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1984             'and that you have write access to it.<br>'.
1985             'It currently points to %s.<br>'.
1986             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1987             'or any custom hostname without a dot causes cookie storage to fail. '.
1988             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1989         );
1990         $msg = sprintf($msg, session_save_path());
1991         echo $msg;
1992         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1993         die;
1994     }
1995     if (!isset($_SESSION['session_tested']))
1996     {   // Step 1 : Try to store data in session and reload page.
1997         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1998         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1999     }
2000     if (isset($_GET['test_session']))
2001     {   // Step 3: Sessions are OK. Remove test parameter from URL.
2002         header('Location: '.index_url($_SERVER));
2003     }
2004
2005
2006     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2007     {
2008         $tz = 'UTC';
2009         if (!empty($_POST['continent']) && !empty($_POST['city'])
2010             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2011         ) {
2012             $tz = $_POST['continent'].'/'.$_POST['city'];
2013         }
2014         $conf->set('general.timezone', $tz);
2015         $login = $_POST['setlogin'];
2016         $conf->set('credentials.login', $login);
2017         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2018         $conf->set('credentials.salt', $salt);
2019         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2020         if (!empty($_POST['title'])) {
2021             $conf->set('general.title', escape($_POST['title']));
2022         } else {
2023             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2024         }
2025         $conf->set('translation.language', escape($_POST['language']));
2026         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2027         $conf->set('api.enabled', !empty($_POST['enableApi']));
2028         $conf->set(
2029             'api.secret',
2030             generate_api_secret(
2031                 $conf->get('credentials.login'),
2032                 $conf->get('credentials.salt')
2033             )
2034         );
2035         try {
2036             // Everything is ok, let's create config file.
2037             $conf->write(isLoggedIn());
2038         }
2039         catch(Exception $e) {
2040             error_log(
2041                     'ERROR while writing config file after installation.' . PHP_EOL .
2042                     $e->getMessage()
2043                 );
2044
2045             // TODO: do not handle exceptions/errors in JS.
2046             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2047             exit;
2048         }
2049         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2050         exit;
2051     }
2052
2053     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2054     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2055     $PAGE->assign('continents', $continents);
2056     $PAGE->assign('cities', $cities);
2057     $PAGE->assign('languages', Languages::getAvailableLanguages());
2058     $PAGE->renderPage('install');
2059     exit;
2060 }
2061
2062 /**
2063  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2064  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2065  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2066  * This function is called by passing the URL:
2067  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2068  * [URL] is the URL of the link (e.g. a flickr page)
2069  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2070  * The function below will fetch the image from the webservice and store it in the cache.
2071  *
2072  * @param ConfigManager $conf Configuration Manager instance,
2073  */
2074 function genThumbnail($conf)
2075 {
2076     // Make sure the parameters in the URL were generated by us.
2077     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2078     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2079
2080     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2081     // Let's see if we don't already have the image for this URL in the cache.
2082     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2083     if (is_file($cacheDir .'/'. $thumbname))
2084     {   // We have the thumbnail, just serve it:
2085         header('Content-Type: image/jpeg');
2086         echo file_get_contents($cacheDir .'/'. $thumbname);
2087         return;
2088     }
2089     // We may also serve a blank image (if service did not respond)
2090     $blankname=hash('sha1',$_GET['url']).'.gif';
2091     if (is_file($cacheDir .'/'. $blankname))
2092     {
2093         header('Content-Type: image/gif');
2094         echo file_get_contents($cacheDir .'/'. $blankname);
2095         return;
2096     }
2097
2098     // Otherwise, generate the thumbnail.
2099     $url = $_GET['url'];
2100     $domain = parse_url($url,PHP_URL_HOST);
2101
2102     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2103     {
2104         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2105         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2106
2107         // Is this a link to an image, or to a flickr page ?
2108         $imageurl='';
2109         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2110         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2111             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2112             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2113         }
2114         else // This is a flickr page (html)
2115         {
2116             // Get the flickr html page.
2117             list($headers, $content) = get_http_response($url, 20);
2118             if (strpos($headers[0], '200 OK') !== false)
2119             {
2120                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2121                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2122                 if (!empty($matches[1])) $imageurl=$matches[1];
2123
2124                 // In albums (and some other pages), the link rel="image_src" is not provided,
2125                 // but flickr provides:
2126                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2127                 if ($imageurl=='')
2128                 {
2129                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2130                     if (!empty($matches[1])) $imageurl=$matches[1];
2131                 }
2132             }
2133         }
2134
2135         if ($imageurl!='')
2136         {   // Let's download the image.
2137             // Image is 240x120, so 10 seconds to download should be enough.
2138             list($headers, $content) = get_http_response($imageurl, 10);
2139             if (strpos($headers[0], '200 OK') !== false) {
2140                 // Save image to cache.
2141                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2142                 header('Content-Type: image/jpeg');
2143                 echo $content;
2144                 return;
2145             }
2146         }
2147     }
2148
2149     elseif ($domain=='vimeo.com' )
2150     {
2151         // This is more complex: we have to perform a HTTP request, then parse the result.
2152         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2153         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2154         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2155         if (strpos($headers[0], '200 OK') !== false) {
2156             $t = unserialize($content);
2157             $imageurl = $t[0]['thumbnail_medium'];
2158             // Then we download the image and serve it to our client.
2159             list($headers, $content) = get_http_response($imageurl, 10);
2160             if (strpos($headers[0], '200 OK') !== false) {
2161                 // Save image to cache.
2162                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2163                 header('Content-Type: image/jpeg');
2164                 echo $content;
2165                 return;
2166             }
2167         }
2168     }
2169
2170     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2171     {
2172         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2173         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2174         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2175         list($headers, $content) = get_http_response($url, 5);
2176         if (strpos($headers[0], '200 OK') !== false) {
2177             // Extract the link to the thumbnail
2178             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2179             if (!empty($matches[1]))
2180             {   // Let's download the image.
2181                 $imageurl=$matches[1];
2182                 // No control on image size, so wait long enough
2183                 list($headers, $content) = get_http_response($imageurl, 20);
2184                 if (strpos($headers[0], '200 OK') !== false) {
2185                     $filepath = $cacheDir .'/'. $thumbname;
2186                     file_put_contents($filepath, $content); // Save image to cache.
2187                     if (resizeImage($filepath))
2188                     {
2189                         header('Content-Type: image/jpeg');
2190                         echo file_get_contents($filepath);
2191                         return;
2192                     }
2193                 }
2194             }
2195         }
2196     }
2197
2198     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2199     {
2200         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2201         // http://xkcd.com/327/
2202         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2203         list($headers, $content) = get_http_response($url, 5);
2204         if (strpos($headers[0], '200 OK') !== false) {
2205             // Extract the link to the thumbnail
2206             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2207             if (!empty($matches[1]))
2208             {   // Let's download the image.
2209                 $imageurl=$matches[1];
2210                 // No control on image size, so wait long enough
2211                 list($headers, $content) = get_http_response($imageurl, 20);
2212                 if (strpos($headers[0], '200 OK') !== false) {
2213                     $filepath = $cacheDir.'/'.$thumbname;
2214                     // Save image to cache.
2215                     file_put_contents($filepath, $content);
2216                     if (resizeImage($filepath))
2217                     {
2218                         header('Content-Type: image/jpeg');
2219                         echo file_get_contents($filepath);
2220                         return;
2221                     }
2222                 }
2223             }
2224         }
2225     }
2226
2227     else
2228     {
2229         // For all other domains, we try to download the image and make a thumbnail.
2230         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2231         list($headers, $content) = get_http_response($url, 30);
2232         if (strpos($headers[0], '200 OK') !== false) {
2233             $filepath = $cacheDir .'/'.$thumbname;
2234             // Save image to cache.
2235             file_put_contents($filepath, $content);
2236             if (resizeImage($filepath))
2237             {
2238                 header('Content-Type: image/jpeg');
2239                 echo file_get_contents($filepath);
2240                 return;
2241             }
2242         }
2243     }
2244
2245
2246     // Otherwise, return an empty image (8x8 transparent gif)
2247     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2248     // Also put something in cache so that this URL is not requested twice.
2249     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2250     header('Content-Type: image/gif');
2251     echo $blankgif;
2252 }
2253
2254 // Make a thumbnail of the image (to width: 120 pixels)
2255 // Returns true if success, false otherwise.
2256 function resizeImage($filepath)
2257 {
2258     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2259
2260     // Trick: some stupid people rename GIF as JPEG... or else.
2261     // So we really try to open each image type whatever the extension is.
2262     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2263     $im=false;
2264     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2265     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2266     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2267     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2268     $w = imagesx($im);
2269     $h = imagesy($im);
2270     $ystart = 0; $yheight=$h;
2271     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2272     $nw = 120;   // Desired width
2273     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2274     // Resize image:
2275     $im2 = imagecreatetruecolor($nw,$nh);
2276     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2277     imageinterlace($im2,true); // For progressive JPEG.
2278     $tempname=$filepath.'_TEMP.jpg';
2279     imagejpeg($im2, $tempname, 90);
2280     imagedestroy($im);
2281     imagedestroy($im2);
2282     unlink($filepath);
2283     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2284     return true;
2285 }
2286
2287 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2288 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2289 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2290     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2291 }
2292
2293 try {
2294     $history = new History($conf->get('resource.history'));
2295 } catch(Exception $e) {
2296     die($e->getMessage());
2297 }
2298
2299 $linkDb = new LinkDB(
2300     $conf->get('resource.datastore'),
2301     isLoggedIn(),
2302     $conf->get('privacy.hide_public_links'),
2303     $conf->get('redirector.url'),
2304     $conf->get('redirector.encode_url')
2305 );
2306
2307 $container = new \Slim\Container();
2308 $container['conf'] = $conf;
2309 $container['plugins'] = $pluginManager;
2310 $container['history'] = $history;
2311 $app = new \Slim\App($container);
2312
2313 // REST API routes
2314 $app->group('/api/v1', function() {
2315     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2316     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2317     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2318     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2319     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2320     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2321     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2322 })->add('\Shaarli\Api\ApiMiddleware');
2323
2324 $response = $app->run(true);
2325 // Hack to make Slim and Shaarli router work together:
2326 // If a Slim route isn't found and NOT API call, we call renderPage().
2327 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2328     // We use UTF-8 for proper international characters handling.
2329     header('Content-Type: text/html; charset=utf-8');
2330     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2331 } else {
2332     $app->respond($response);
2333 }