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['privateonly']);
 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['privateonly']) ? 'private' : 'all';
 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['privateonly']) ? 'private' : 'all';
 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['privateonly'])) {
1020         if (empty($_SESSION['privateonly'])) {
1021             $_SESSION['privateonly'] = 1; // See only private links
1022         } else {
1023             unset($_SESSION['privateonly']); // See all links
1024         }
1025
1026         if (! empty($_SERVER['HTTP_REFERER'])) {
1027             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1028         } else {
1029             $location = '?';
1030         }
1031         header('Location: '. $location);
1032         exit;
1033     }
1034
1035     // -------- User wants to see only untagged links (toggle)
1036     if (isset($_GET['untaggedonly'])) {
1037         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1038
1039         if (! empty($_SERVER['HTTP_REFERER'])) {
1040             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1041         } else {
1042             $location = '?';
1043         }
1044         header('Location: '. $location);
1045         exit;
1046     }
1047
1048     // -------- Handle other actions allowed for non-logged in users:
1049     if (!isLoggedIn())
1050     {
1051         // User tries to post new link but is not logged in:
1052         // Show login screen, then redirect to ?post=...
1053         if (isset($_GET['post']))
1054         {
1055             header( // Redirect to login page, then back to post link.
1056                 'Location: ?do=login&post='.urlencode($_GET['post']).
1057                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1058                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1059                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1060                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1061             );
1062             exit;
1063         }
1064
1065         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1066         if (isset($_GET['edit_link'])) {
1067             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1068             exit;
1069         }
1070
1071         exit; // Never remove this one! All operations below are reserved for logged in user.
1072     }
1073
1074     // -------- All other functions are reserved for the registered user:
1075
1076     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1077     if ($targetPage == Router::$PAGE_TOOLS)
1078     {
1079         $data = [
1080             'pageabsaddr' => index_url($_SERVER),
1081             'sslenabled' => is_https($_SERVER),
1082         ];
1083         $pluginManager->executeHooks('render_tools', $data);
1084
1085         foreach ($data as $key => $value) {
1086             $PAGE->assign($key, $value);
1087         }
1088
1089         $PAGE->renderPage('tools');
1090         exit;
1091     }
1092
1093     // -------- User wants to change his/her password.
1094     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1095     {
1096         if ($conf->get('security.open_shaarli')) {
1097             die(t('You are not supposed to change a password on an Open Shaarli.'));
1098         }
1099
1100         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1101         {
1102             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1103
1104             // Make sure old password is correct.
1105             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1106             if ($oldhash!= $conf->get('credentials.hash')) {
1107                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1108                 exit;
1109             }
1110             // Save new password
1111             // Salt renders rainbow-tables attacks useless.
1112             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1113             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1114             try {
1115                 $conf->write(isLoggedIn());
1116             }
1117             catch(Exception $e) {
1118                 error_log(
1119                     'ERROR while writing config file after changing password.' . PHP_EOL .
1120                     $e->getMessage()
1121                 );
1122
1123                 // TODO: do not handle exceptions/errors in JS.
1124                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1125                 exit;
1126             }
1127             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1128             exit;
1129         }
1130         else // show the change password form.
1131         {
1132             $PAGE->renderPage('changepassword');
1133             exit;
1134         }
1135     }
1136
1137     // -------- User wants to change configuration
1138     if ($targetPage == Router::$PAGE_CONFIGURE)
1139     {
1140         if (!empty($_POST['title']) )
1141         {
1142             if (!$sessionManager->checkToken($_POST['token'])) {
1143                 die(t('Wrong token.')); // Go away!
1144             }
1145             $tz = 'UTC';
1146             if (!empty($_POST['continent']) && !empty($_POST['city'])
1147                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1148             ) {
1149                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1150             }
1151             $conf->set('general.timezone', $tz);
1152             $conf->set('general.title', escape($_POST['title']));
1153             $conf->set('general.header_link', escape($_POST['titleLink']));
1154             $conf->set('resource.theme', escape($_POST['theme']));
1155             $conf->set('redirector.url', escape($_POST['redirector']));
1156             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1157             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1158             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1159             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1160             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1161             $conf->set('api.enabled', !empty($_POST['enableApi']));
1162             $conf->set('api.secret', escape($_POST['apiSecret']));
1163             $conf->set('translation.language', escape($_POST['language']));
1164
1165             try {
1166                 $conf->write(isLoggedIn());
1167                 $history->updateSettings();
1168                 invalidateCaches($conf->get('resource.page_cache'));
1169             }
1170             catch(Exception $e) {
1171                 error_log(
1172                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1173                     $e->getMessage()
1174                 );
1175
1176                 // TODO: do not handle exceptions/errors in JS.
1177                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1178                 exit;
1179             }
1180             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1181             exit;
1182         }
1183         else // Show the configuration form.
1184         {
1185             $PAGE->assign('title', $conf->get('general.title'));
1186             $PAGE->assign('theme', $conf->get('resource.theme'));
1187             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1188             $PAGE->assign('redirector', $conf->get('redirector.url'));
1189             list($continents, $cities) = generateTimeZoneData(
1190                 timezone_identifiers_list(),
1191                 $conf->get('general.timezone')
1192             );
1193             $PAGE->assign('continents', $continents);
1194             $PAGE->assign('cities', $cities);
1195             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1196             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1197             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1198             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1199             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1200             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1201             $PAGE->assign('api_secret', $conf->get('api.secret'));
1202             $PAGE->assign('languages', Languages::getAvailableLanguages());
1203             $PAGE->assign('language', $conf->get('translation.language'));
1204             $PAGE->renderPage('configure');
1205             exit;
1206         }
1207     }
1208
1209     // -------- User wants to rename a tag or delete it
1210     if ($targetPage == Router::$PAGE_CHANGETAG)
1211     {
1212         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1213             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1214             $PAGE->renderPage('changetag');
1215             exit;
1216         }
1217
1218         if (!$sessionManager->checkToken($_POST['token'])) {
1219             die(t('Wrong token.'));
1220         }
1221
1222         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1223         $LINKSDB->save($conf->get('resource.page_cache'));
1224         foreach ($alteredLinks as $link) {
1225             $history->updateLink($link);
1226         }
1227         $delete = empty($_POST['totag']);
1228         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1229         $count = count($alteredLinks);
1230         $alert = $delete
1231             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1232             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1233         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1234         exit;
1235     }
1236
1237     // -------- User wants to add a link without using the bookmarklet: Show form.
1238     if ($targetPage == Router::$PAGE_ADDLINK)
1239     {
1240         $PAGE->renderPage('addlink');
1241         exit;
1242     }
1243
1244     // -------- User clicked the "Save" button when editing a link: Save link to database.
1245     if (isset($_POST['save_edit']))
1246     {
1247         // Go away!
1248         if (! $sessionManager->checkToken($_POST['token'])) {
1249             die(t('Wrong token.'));
1250         }
1251
1252         // lf_id should only be present if the link exists.
1253         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1254         // Linkdate is kept here to:
1255         //   - use the same permalink for notes as they're displayed when creating them
1256         //   - let users hack creation date of their posts
1257         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1258         $linkdate = escape($_POST['lf_linkdate']);
1259         if (isset($LINKSDB[$id])) {
1260             // Edit
1261             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1262             $updated = new DateTime();
1263             $shortUrl = $LINKSDB[$id]['shorturl'];
1264             $new = false;
1265         } else {
1266             // New link
1267             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1268             $updated = null;
1269             $shortUrl = link_small_hash($created, $id);
1270             $new = true;
1271         }
1272
1273         // Remove multiple spaces.
1274         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1275         // Remove first '-' char in tags.
1276         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1277         // Remove duplicates.
1278         $tags = implode(' ', array_unique(explode(' ', $tags)));
1279
1280         if (empty(trim($_POST['lf_url']))) {
1281             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1282         }
1283         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1284
1285         $link = array(
1286             'id' => $id,
1287             'title' => trim($_POST['lf_title']),
1288             'url' => $url,
1289             'description' => $_POST['lf_description'],
1290             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1291             'created' => $created,
1292             'updated' => $updated,
1293             'tags' => str_replace(',', ' ', $tags),
1294             'shorturl' => $shortUrl,
1295         );
1296
1297         // If title is empty, use the URL as title.
1298         if ($link['title'] == '') {
1299             $link['title'] = $link['url'];
1300         }
1301
1302         $pluginManager->executeHooks('save_link', $link);
1303
1304         $LINKSDB[$id] = $link;
1305         $LINKSDB->save($conf->get('resource.page_cache'));
1306         if ($new) {
1307             $history->addLink($link);
1308         } else {
1309             $history->updateLink($link);
1310         }
1311
1312         // If we are called from the bookmarklet, we must close the popup:
1313         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1314             echo '<script>self.close();</script>';
1315             exit;
1316         }
1317
1318         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1319         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1320         // Scroll to the link which has been edited.
1321         $location .= '#' . $link['shorturl'];
1322         // After saving the link, redirect to the page the user was on.
1323         header('Location: '. $location);
1324         exit;
1325     }
1326
1327     // -------- User clicked the "Cancel" button when editing a link.
1328     if (isset($_POST['cancel_edit']))
1329     {
1330         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1331         if (! isset($LINKSDB[$id])) {
1332             header('Location: ?');
1333         }
1334         // If we are called from the bookmarklet, we must close the popup:
1335         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1336         $link = $LINKSDB[$id];
1337         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1338         // Scroll to the link which has been edited.
1339         $returnurl .= '#'. $link['shorturl'];
1340         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1341         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1342         exit;
1343     }
1344
1345     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1346     if ($targetPage == Router::$PAGE_DELETELINK)
1347     {
1348         if (! $sessionManager->checkToken($_GET['token'])) {
1349             die(t('Wrong token.'));
1350         }
1351
1352         $ids = trim($_GET['lf_linkdate']);
1353         if (strpos($ids, ' ') !== false) {
1354             // multiple, space-separated ids provided
1355             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1356         } else {
1357             // only a single id provided
1358             $ids = [$ids];
1359         }
1360         // assert at least one id is given
1361         if(!count($ids)){
1362             die('no id provided');
1363         }
1364         foreach ($ids as $id) {
1365             $id = (int) escape($id);
1366             $link = $LINKSDB[$id];
1367             $pluginManager->executeHooks('delete_link', $link);
1368             unset($LINKSDB[$id]);
1369         }
1370         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1371         $history->deleteLink($link);
1372
1373         // If we are called from the bookmarklet, we must close the popup:
1374         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1375
1376         $location = '?';
1377         if (isset($_SERVER['HTTP_REFERER'])) {
1378             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1379             $location = generateLocation(
1380                     $_SERVER['HTTP_REFERER'],
1381                     $_SERVER['HTTP_HOST'],
1382                     ['delete_link', 'edit_link', $link['shorturl']]
1383             );
1384         }
1385
1386         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1387         exit;
1388     }
1389
1390     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1391     if (isset($_GET['edit_link']))
1392     {
1393         $id = (int) escape($_GET['edit_link']);
1394         $link = $LINKSDB[$id];  // Read database
1395         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1396         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1397         $data = array(
1398             'link' => $link,
1399             'link_is_new' => false,
1400             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1401             'tags' => $LINKSDB->linksCountPerTag(),
1402         );
1403         $pluginManager->executeHooks('render_editlink', $data);
1404
1405         foreach ($data as $key => $value) {
1406             $PAGE->assign($key, $value);
1407         }
1408
1409         $PAGE->renderPage('editlink');
1410         exit;
1411     }
1412
1413     // -------- User want to post a new link: Display link edit form.
1414     if (isset($_GET['post'])) {
1415         $url = cleanup_url($_GET['post']);
1416
1417         $link_is_new = false;
1418         // Check if URL is not already in database (in this case, we will edit the existing link)
1419         $link = $LINKSDB->getLinkFromUrl($url);
1420         if (! $link)
1421         {
1422             $link_is_new = true;
1423             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1424             // Get title if it was provided in URL (by the bookmarklet).
1425             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1426             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1427             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1428             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1429             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1430             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1431             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1432                 // Short timeout to keep the application responsive
1433                 // The callback will fill $charset and $title with data from the downloaded page.
1434                 get_http_response($url, 25, 4194304, get_curl_download_callback($charset, $title));
1435                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1436                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1437                 }
1438             }
1439
1440             if ($url == '') {
1441                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1442                 $title = $conf->get('general.default_note_title', t('Note: '));
1443             }
1444             $url = escape($url);
1445             $title = escape($title);
1446
1447             $link = array(
1448                 'linkdate' => $linkdate,
1449                 'title' => $title,
1450                 'url' => $url,
1451                 'description' => $description,
1452                 'tags' => $tags,
1453                 'private' => $private,
1454             );
1455         } else {
1456             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1457         }
1458
1459         $data = array(
1460             'link' => $link,
1461             'link_is_new' => $link_is_new,
1462             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1463             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1464             'tags' => $LINKSDB->linksCountPerTag(),
1465             'default_private_links' => $conf->get('privacy.default_private_links', false),
1466         );
1467         $pluginManager->executeHooks('render_editlink', $data);
1468
1469         foreach ($data as $key => $value) {
1470             $PAGE->assign($key, $value);
1471         }
1472
1473         $PAGE->renderPage('editlink');
1474         exit;
1475     }
1476
1477     if ($targetPage == Router::$PAGE_EXPORT) {
1478         // Export links as a Netscape Bookmarks file
1479
1480         if (empty($_GET['selection'])) {
1481             $PAGE->renderPage('export');
1482             exit;
1483         }
1484
1485         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1486         $selection = $_GET['selection'];
1487         if (isset($_GET['prepend_note_url'])) {
1488             $prependNoteUrl = $_GET['prepend_note_url'];
1489         } else {
1490             $prependNoteUrl = false;
1491         }
1492
1493         try {
1494             $PAGE->assign(
1495                 'links',
1496                 NetscapeBookmarkUtils::filterAndFormat(
1497                     $LINKSDB,
1498                     $selection,
1499                     $prependNoteUrl,
1500                     index_url($_SERVER)
1501                 )
1502             );
1503         } catch (Exception $exc) {
1504             header('Content-Type: text/plain; charset=utf-8');
1505             echo $exc->getMessage();
1506             exit;
1507         }
1508         $now = new DateTime();
1509         header('Content-Type: text/html; charset=utf-8');
1510         header(
1511             'Content-disposition: attachment; filename=bookmarks_'
1512            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1513         );
1514         $PAGE->assign('date', $now->format(DateTime::RFC822));
1515         $PAGE->assign('eol', PHP_EOL);
1516         $PAGE->assign('selection', $selection);
1517         $PAGE->renderPage('export.bookmarks');
1518         exit;
1519     }
1520
1521     if ($targetPage == Router::$PAGE_IMPORT) {
1522         // Upload a Netscape bookmark dump to import its contents
1523
1524         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1525             // Show import dialog
1526             $PAGE->assign(
1527                 'maxfilesize',
1528                 get_max_upload_size(
1529                     ini_get('post_max_size'),
1530                     ini_get('upload_max_filesize'),
1531                     false
1532                 )
1533             );
1534             $PAGE->assign(
1535                 'maxfilesizeHuman',
1536                 get_max_upload_size(
1537                     ini_get('post_max_size'),
1538                     ini_get('upload_max_filesize'),
1539                     true
1540                 )
1541             );
1542             $PAGE->renderPage('import');
1543             exit;
1544         }
1545
1546         // Import bookmarks from an uploaded file
1547         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1548             // The file is too big or some form field may be missing.
1549             $msg = sprintf(
1550                 t(
1551                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1552                     .' (%s). Please upload in smaller chunks.'
1553                 ),
1554                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1555             );
1556             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1557             exit;
1558         }
1559         if (! $sessionManager->checkToken($_POST['token'])) {
1560             die('Wrong token.');
1561         }
1562         $status = NetscapeBookmarkUtils::import(
1563             $_POST,
1564             $_FILES,
1565             $LINKSDB,
1566             $conf,
1567             $history
1568         );
1569         echo '<script>alert("'.$status.'");document.location=\'?do='
1570              .Router::$PAGE_IMPORT .'\';</script>';
1571         exit;
1572     }
1573
1574     // Plugin administration page
1575     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1576         $pluginMeta = $pluginManager->getPluginsMeta();
1577
1578         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1579         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1580         // Load parameters.
1581         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1582         uasort(
1583             $enabledPlugins,
1584             function($a, $b) { return $a['order'] - $b['order']; }
1585         );
1586         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1587
1588         $PAGE->assign('enabledPlugins', $enabledPlugins);
1589         $PAGE->assign('disabledPlugins', $disabledPlugins);
1590         $PAGE->renderPage('pluginsadmin');
1591         exit;
1592     }
1593
1594     // Plugin administration form action
1595     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1596         try {
1597             if (isset($_POST['parameters_form'])) {
1598                 unset($_POST['parameters_form']);
1599                 foreach ($_POST as $param => $value) {
1600                     $conf->set('plugins.'. $param, escape($value));
1601                 }
1602             }
1603             else {
1604                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1605             }
1606             $conf->write(isLoggedIn());
1607             $history->updateSettings();
1608         }
1609         catch (Exception $e) {
1610             error_log(
1611                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1612                 $e->getMessage()
1613             );
1614
1615             // TODO: do not handle exceptions/errors in JS.
1616             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1617             exit;
1618         }
1619         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1620         exit;
1621     }
1622
1623     // Get a fresh token
1624     if ($targetPage == Router::$GET_TOKEN) {
1625         header('Content-Type:text/plain');
1626         echo $sessionManager->generateToken($conf);
1627         exit;
1628     }
1629
1630     // -------- Otherwise, simply display search form and links:
1631     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1632     exit;
1633 }
1634
1635 /**
1636  * Template for the list of links (<div id="linklist">)
1637  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1638  *
1639  * @param pageBuilder   $PAGE          pageBuilder instance.
1640  * @param LinkDB        $LINKSDB       LinkDB instance.
1641  * @param ConfigManager $conf          Configuration Manager instance.
1642  * @param PluginManager $pluginManager Plugin Manager instance.
1643  */
1644 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1645 {
1646     // Used in templates
1647     if (isset($_GET['searchtags'])) {
1648         if (! empty($_GET['searchtags'])) {
1649             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1650         } else {
1651             $searchtags = false;
1652         }
1653     } else {
1654         $searchtags = '';
1655     }
1656     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1657
1658     // Smallhash filter
1659     if (! empty($_SERVER['QUERY_STRING'])
1660         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1661         try {
1662             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1663         } catch (LinkNotFoundException $e) {
1664             $PAGE->render404($e->getMessage());
1665             exit;
1666         }
1667     } else {
1668         // Filter links according search parameters.
1669         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1670         $request = [
1671             'searchtags' => $searchtags,
1672             'searchterm' => $searchterm,
1673         ];
1674         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1675     }
1676
1677     // ---- Handle paging.
1678     $keys = array();
1679     foreach ($linksToDisplay as $key => $value) {
1680         $keys[] = $key;
1681     }
1682
1683
1684
1685     // Select articles according to paging.
1686     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1687     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1688     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1689     $page = $page < 1 ? 1 : $page;
1690     $page = $page > $pagecount ? $pagecount : $page;
1691     // Start index.
1692     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1693     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1694     $linkDisp = array();
1695     while ($i<$end && $i<count($keys))
1696     {
1697         $link = $linksToDisplay[$keys[$i]];
1698         $link['description'] = format_description(
1699             $link['description'],
1700             $conf->get('redirector.url'),
1701             $conf->get('redirector.encode_url')
1702         );
1703         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1704         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1705         $link['timestamp'] = $link['created']->getTimestamp();
1706         if (! empty($link['updated'])) {
1707             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1708         } else {
1709             $link['updated_timestamp'] = '';
1710         }
1711         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1712         uasort($taglist, 'strcasecmp');
1713         $link['taglist'] = $taglist;
1714         // Check for both signs of a note: starting with ? and 7 chars long.
1715         if ($link['url'][0] === '?' &&
1716             strlen($link['url']) === 7) {
1717             $link['url'] = index_url($_SERVER) . $link['url'];
1718         }
1719
1720         $linkDisp[$keys[$i]] = $link;
1721         $i++;
1722     }
1723
1724     // Compute paging navigation
1725     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1726     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1727     $previous_page_url = '';
1728     if ($i != count($keys)) {
1729         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1730     }
1731     $next_page_url='';
1732     if ($page>1) {
1733         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1734     }
1735
1736     // Fill all template fields.
1737     $data = array(
1738         'previous_page_url' => $previous_page_url,
1739         'next_page_url' => $next_page_url,
1740         'page_current' => $page,
1741         'page_max' => $pagecount,
1742         'result_count' => count($linksToDisplay),
1743         'search_term' => $searchterm,
1744         'search_tags' => $searchtags,
1745         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1746         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1747         'links' => $linkDisp,
1748     );
1749
1750     // If there is only a single link, we change on-the-fly the title of the page.
1751     if (count($linksToDisplay) == 1) {
1752         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1753     }
1754
1755     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1756
1757     foreach ($data as $key => $value) {
1758         $PAGE->assign($key, $value);
1759     }
1760
1761     return;
1762 }
1763
1764 /**
1765  * Compute the thumbnail for a link.
1766  *
1767  * With a link to the original URL.
1768  * Understands various services (youtube.com...)
1769  * Input: $url = URL for which the thumbnail must be found.
1770  *        $href = if provided, this URL will be followed instead of $url
1771  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1772  * Some of them may be missing.
1773  * Return an empty array if no thumbnail available.
1774  *
1775  * @param ConfigManager $conf Configuration Manager instance.
1776  * @param string        $url
1777  * @param string|bool   $href
1778  *
1779  * @return array
1780  */
1781 function computeThumbnail($conf, $url, $href = false)
1782 {
1783     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1784     if ($href==false) $href=$url;
1785
1786     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1787     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1788     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1789     $domain = parse_url($url,PHP_URL_HOST);
1790     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1791     {
1792         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1793         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1794                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1795     }
1796     if ($domain=='youtu.be') // Youtube short links
1797     {
1798         $path = parse_url($url,PHP_URL_PATH);
1799         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1800                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1801     }
1802     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1803     {
1804         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1805         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1806                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1807     }
1808
1809     if ($domain=='imgur.com')
1810     {
1811         $path = parse_url($url,PHP_URL_PATH);
1812         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1813         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1814                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1815         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1816                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1817
1818         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1819                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1820     }
1821     if ($domain=='i.imgur.com')
1822     {
1823         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1824         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1825                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1826     }
1827     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1828     {
1829         if (strpos($url,'dailymotion.com/video/')!==false)
1830         {
1831             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1832             return array('src'=>$thumburl,
1833                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1834         }
1835     }
1836     if (endsWith($domain,'.imageshack.us'))
1837     {
1838         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1839         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1840         {
1841             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1842             return array('src'=>$thumburl,
1843                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1844         }
1845     }
1846
1847     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1848     // So we deport the thumbnail generation in order not to slow down page generation
1849     // (and we also cache the thumbnail)
1850
1851     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1852
1853     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1854         || $domain=='vimeo.com'
1855         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1856         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1857     )
1858     {
1859         if ($domain=='vimeo.com')
1860         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1861             $path = parse_url($url,PHP_URL_PATH);
1862             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1863         }
1864         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1865         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1866             $path = parse_url($url,PHP_URL_PATH);
1867             if (!preg_match('!/\d+.+?!',$path)) return array();
1868         }
1869         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1870         {   // Make sure this TED URL points to a video (/talks/...)
1871             $path = parse_url($url,PHP_URL_PATH);
1872             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1873         }
1874         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1875         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1876                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1877     }
1878
1879     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1880     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1881     // But using the extension will do.
1882     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1883     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
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     return array(); // No thumbnail.
1890
1891 }
1892
1893
1894 // Returns the HTML code to display a thumbnail for a link
1895 // with a link to the original URL.
1896 // Understands various services (youtube.com...)
1897 // Input: $url = URL for which the thumbnail must be found.
1898 //        $href = if provided, this URL will be followed instead of $url
1899 // Returns '' if no thumbnail available.
1900 function thumbnail($url,$href=false)
1901 {
1902     // FIXME!
1903     global $conf;
1904     $t = computeThumbnail($conf, $url,$href);
1905     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1906
1907     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1908     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1909     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1910     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1911     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1912     $html.='></a>';
1913     return $html;
1914 }
1915
1916 // Returns the HTML code to display a thumbnail for a link
1917 // for the picture wall (using lazy image loading)
1918 // Understands various services (youtube.com...)
1919 // Input: $url = URL for which the thumbnail must be found.
1920 //        $href = if provided, this URL will be followed instead of $url
1921 // Returns '' if no thumbnail available.
1922 function lazyThumbnail($conf, $url,$href=false)
1923 {
1924     // FIXME!
1925     global $conf;
1926     $t = computeThumbnail($conf, $url,$href);
1927     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1928
1929     $html='<a href="'.escape($t['href']).'">';
1930
1931     // Lazy image
1932     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1933
1934     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1935     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1936     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1937     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1938     $html.='>';
1939
1940     // No-JavaScript fallback.
1941     $html.='<noscript><img src="'.escape($t['src']).'"';
1942     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1943     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1944     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1945     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1946     $html.='></noscript></a>';
1947
1948     return $html;
1949 }
1950
1951
1952 /**
1953  * Installation
1954  * This function should NEVER be called if the file data/config.php exists.
1955  *
1956  * @param ConfigManager  $conf           Configuration Manager instance.
1957  * @param SessionManager $sessionManager SessionManager instance
1958  */
1959 function install($conf, $sessionManager) {
1960     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1961     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1962
1963
1964     // This part makes sure sessions works correctly.
1965     // (Because on some hosts, session.save_path may not be set correctly,
1966     // or we may not have write access to it.)
1967     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1968     {
1969         // Step 2: Check if data in session is correct.
1970         $msg = t(
1971             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1972             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1973             'and that you have write access to it.<br>'.
1974             'It currently points to %s.<br>'.
1975             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1976             'or any custom hostname without a dot causes cookie storage to fail. '.
1977             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1978         );
1979         $msg = sprintf($msg, session_save_path());
1980         echo $msg;
1981         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1982         die;
1983     }
1984     if (!isset($_SESSION['session_tested']))
1985     {   // Step 1 : Try to store data in session and reload page.
1986         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1987         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1988     }
1989     if (isset($_GET['test_session']))
1990     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1991         header('Location: '.index_url($_SERVER));
1992     }
1993
1994
1995     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1996     {
1997         $tz = 'UTC';
1998         if (!empty($_POST['continent']) && !empty($_POST['city'])
1999             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2000         ) {
2001             $tz = $_POST['continent'].'/'.$_POST['city'];
2002         }
2003         $conf->set('general.timezone', $tz);
2004         $login = $_POST['setlogin'];
2005         $conf->set('credentials.login', $login);
2006         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2007         $conf->set('credentials.salt', $salt);
2008         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2009         if (!empty($_POST['title'])) {
2010             $conf->set('general.title', escape($_POST['title']));
2011         } else {
2012             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2013         }
2014         $conf->set('translation.language', escape($_POST['language']));
2015         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2016         $conf->set('api.enabled', !empty($_POST['enableApi']));
2017         $conf->set(
2018             'api.secret',
2019             generate_api_secret(
2020                 $conf->get('credentials.login'),
2021                 $conf->get('credentials.salt')
2022             )
2023         );
2024         try {
2025             // Everything is ok, let's create config file.
2026             $conf->write(isLoggedIn());
2027         }
2028         catch(Exception $e) {
2029             error_log(
2030                     'ERROR while writing config file after installation.' . PHP_EOL .
2031                     $e->getMessage()
2032                 );
2033
2034             // TODO: do not handle exceptions/errors in JS.
2035             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2036             exit;
2037         }
2038         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2039         exit;
2040     }
2041
2042     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2043     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2044     $PAGE->assign('continents', $continents);
2045     $PAGE->assign('cities', $cities);
2046     $PAGE->assign('languages', Languages::getAvailableLanguages());
2047     $PAGE->renderPage('install');
2048     exit;
2049 }
2050
2051 /**
2052  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2053  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2054  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2055  * This function is called by passing the URL:
2056  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2057  * [URL] is the URL of the link (e.g. a flickr page)
2058  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2059  * The function below will fetch the image from the webservice and store it in the cache.
2060  *
2061  * @param ConfigManager $conf Configuration Manager instance,
2062  */
2063 function genThumbnail($conf)
2064 {
2065     // Make sure the parameters in the URL were generated by us.
2066     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2067     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2068
2069     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2070     // Let's see if we don't already have the image for this URL in the cache.
2071     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2072     if (is_file($cacheDir .'/'. $thumbname))
2073     {   // We have the thumbnail, just serve it:
2074         header('Content-Type: image/jpeg');
2075         echo file_get_contents($cacheDir .'/'. $thumbname);
2076         return;
2077     }
2078     // We may also serve a blank image (if service did not respond)
2079     $blankname=hash('sha1',$_GET['url']).'.gif';
2080     if (is_file($cacheDir .'/'. $blankname))
2081     {
2082         header('Content-Type: image/gif');
2083         echo file_get_contents($cacheDir .'/'. $blankname);
2084         return;
2085     }
2086
2087     // Otherwise, generate the thumbnail.
2088     $url = $_GET['url'];
2089     $domain = parse_url($url,PHP_URL_HOST);
2090
2091     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2092     {
2093         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2094         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2095
2096         // Is this a link to an image, or to a flickr page ?
2097         $imageurl='';
2098         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2099         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2100             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2101             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2102         }
2103         else // This is a flickr page (html)
2104         {
2105             // Get the flickr html page.
2106             list($headers, $content) = get_http_response($url, 20);
2107             if (strpos($headers[0], '200 OK') !== false)
2108             {
2109                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2110                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2111                 if (!empty($matches[1])) $imageurl=$matches[1];
2112
2113                 // In albums (and some other pages), the link rel="image_src" is not provided,
2114                 // but flickr provides:
2115                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2116                 if ($imageurl=='')
2117                 {
2118                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2119                     if (!empty($matches[1])) $imageurl=$matches[1];
2120                 }
2121             }
2122         }
2123
2124         if ($imageurl!='')
2125         {   // Let's download the image.
2126             // Image is 240x120, so 10 seconds to download should be enough.
2127             list($headers, $content) = get_http_response($imageurl, 10);
2128             if (strpos($headers[0], '200 OK') !== false) {
2129                 // Save image to cache.
2130                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2131                 header('Content-Type: image/jpeg');
2132                 echo $content;
2133                 return;
2134             }
2135         }
2136     }
2137
2138     elseif ($domain=='vimeo.com' )
2139     {
2140         // This is more complex: we have to perform a HTTP request, then parse the result.
2141         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2142         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2143         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2144         if (strpos($headers[0], '200 OK') !== false) {
2145             $t = unserialize($content);
2146             $imageurl = $t[0]['thumbnail_medium'];
2147             // Then we download the image and serve it to our client.
2148             list($headers, $content) = get_http_response($imageurl, 10);
2149             if (strpos($headers[0], '200 OK') !== false) {
2150                 // Save image to cache.
2151                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2152                 header('Content-Type: image/jpeg');
2153                 echo $content;
2154                 return;
2155             }
2156         }
2157     }
2158
2159     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2160     {
2161         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2162         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2163         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2164         list($headers, $content) = get_http_response($url, 5);
2165         if (strpos($headers[0], '200 OK') !== false) {
2166             // Extract the link to the thumbnail
2167             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2168             if (!empty($matches[1]))
2169             {   // Let's download the image.
2170                 $imageurl=$matches[1];
2171                 // No control on image size, so wait long enough
2172                 list($headers, $content) = get_http_response($imageurl, 20);
2173                 if (strpos($headers[0], '200 OK') !== false) {
2174                     $filepath = $cacheDir .'/'. $thumbname;
2175                     file_put_contents($filepath, $content); // Save image to cache.
2176                     if (resizeImage($filepath))
2177                     {
2178                         header('Content-Type: image/jpeg');
2179                         echo file_get_contents($filepath);
2180                         return;
2181                     }
2182                 }
2183             }
2184         }
2185     }
2186
2187     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2188     {
2189         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2190         // http://xkcd.com/327/
2191         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2192         list($headers, $content) = get_http_response($url, 5);
2193         if (strpos($headers[0], '200 OK') !== false) {
2194             // Extract the link to the thumbnail
2195             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2196             if (!empty($matches[1]))
2197             {   // Let's download the image.
2198                 $imageurl=$matches[1];
2199                 // No control on image size, so wait long enough
2200                 list($headers, $content) = get_http_response($imageurl, 20);
2201                 if (strpos($headers[0], '200 OK') !== false) {
2202                     $filepath = $cacheDir.'/'.$thumbname;
2203                     // Save image to cache.
2204                     file_put_contents($filepath, $content);
2205                     if (resizeImage($filepath))
2206                     {
2207                         header('Content-Type: image/jpeg');
2208                         echo file_get_contents($filepath);
2209                         return;
2210                     }
2211                 }
2212             }
2213         }
2214     }
2215
2216     else
2217     {
2218         // For all other domains, we try to download the image and make a thumbnail.
2219         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2220         list($headers, $content) = get_http_response($url, 30);
2221         if (strpos($headers[0], '200 OK') !== false) {
2222             $filepath = $cacheDir .'/'.$thumbname;
2223             // Save image to cache.
2224             file_put_contents($filepath, $content);
2225             if (resizeImage($filepath))
2226             {
2227                 header('Content-Type: image/jpeg');
2228                 echo file_get_contents($filepath);
2229                 return;
2230             }
2231         }
2232     }
2233
2234
2235     // Otherwise, return an empty image (8x8 transparent gif)
2236     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2237     // Also put something in cache so that this URL is not requested twice.
2238     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2239     header('Content-Type: image/gif');
2240     echo $blankgif;
2241 }
2242
2243 // Make a thumbnail of the image (to width: 120 pixels)
2244 // Returns true if success, false otherwise.
2245 function resizeImage($filepath)
2246 {
2247     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2248
2249     // Trick: some stupid people rename GIF as JPEG... or else.
2250     // So we really try to open each image type whatever the extension is.
2251     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2252     $im=false;
2253     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2254     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2255     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2256     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2257     $w = imagesx($im);
2258     $h = imagesy($im);
2259     $ystart = 0; $yheight=$h;
2260     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2261     $nw = 120;   // Desired width
2262     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2263     // Resize image:
2264     $im2 = imagecreatetruecolor($nw,$nh);
2265     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2266     imageinterlace($im2,true); // For progressive JPEG.
2267     $tempname=$filepath.'_TEMP.jpg';
2268     imagejpeg($im2, $tempname, 90);
2269     imagedestroy($im);
2270     imagedestroy($im2);
2271     unlink($filepath);
2272     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2273     return true;
2274 }
2275
2276 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2277 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2278 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2279     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2280 }
2281
2282 try {
2283     $history = new History($conf->get('resource.history'));
2284 } catch(Exception $e) {
2285     die($e->getMessage());
2286 }
2287
2288 $linkDb = new LinkDB(
2289     $conf->get('resource.datastore'),
2290     isLoggedIn(),
2291     $conf->get('privacy.hide_public_links'),
2292     $conf->get('redirector.url'),
2293     $conf->get('redirector.encode_url')
2294 );
2295
2296 $container = new \Slim\Container();
2297 $container['conf'] = $conf;
2298 $container['plugins'] = $pluginManager;
2299 $container['history'] = $history;
2300 $app = new \Slim\App($container);
2301
2302 // REST API routes
2303 $app->group('/api/v1', function() {
2304     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2305     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2306     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2307     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2308     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2309     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2310     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2311 })->add('\Shaarli\Api\ApiMiddleware');
2312
2313 $response = $app->run(true);
2314 // Hack to make Slim and Shaarli router work together:
2315 // If a Slim route isn't found and NOT API call, we call renderPage().
2316 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2317     // We use UTF-8 for proper international characters handling.
2318     header('Content-Type: text/html; charset=utf-8');
2319     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2320 } else {
2321     $app->respond($response);
2322 }