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://github.com/shaarli/Shaarli/wiki/Server-requirements\n"
  52         ."- https://github.com/shaarli/Shaarli/wiki/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/Languages.php';
  68 require_once 'application/LinkDB.php';
  69 require_once 'application/LinkFilter.php';
  70 require_once 'application/LinkUtils.php';
  71 require_once 'application/NetscapeBookmarkUtils.php';
  72 require_once 'application/PageBuilder.php';
  73 require_once 'application/TimeZone.php';
  74 require_once 'application/Url.php';
  75 require_once 'application/Utils.php';
  76 require_once 'application/PluginManager.php';
  77 require_once 'application/Router.php';
  78 require_once 'application/Updater.php';
  79 use \Shaarli\ThemeUtils;
  80 use \Shaarli\Config\ConfigManager;
  81
  82 // Ensure the PHP version is supported
  83 try {
  84     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  85 } catch(Exception $exc) {
  86     header('Content-Type: text/plain; charset=utf-8');
  87     echo $exc->getMessage();
  88     exit;
  89 }
  90
  91 define('shaarli_version', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  92
  93 // Force cookie path (but do not change lifetime)
  94 $cookie = session_get_cookie_params();
  95 $cookiedir = '';
  96 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  97     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
  98 }
  99 // Set default cookie expiration and path.
 100 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 101 // Set session parameters on server side.
 102 // If the user does not access any page within this time, his/her session is considered expired.
 103 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 104 // Use cookies to store session.
 105 ini_set('session.use_cookies', 1);
 106 // Force cookies for session (phpsessionID forbidden in URL).
 107 ini_set('session.use_only_cookies', 1);
 108 // Prevent PHP form using sessionID in URL if cookies are disabled.
 109 ini_set('session.use_trans_sid', false);
 110
 111 session_name('shaarli');
 112 // Start session if needed (Some server auto-start sessions).
 113 if (session_id() == '') {
 114     session_start();
 115 }
 116
 117 // Regenerate session ID if invalid or not defined in cookie.
 118 if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
 119     session_regenerate_id(true);
 120     $_COOKIE['shaarli'] = session_id();
 121 }
 122
 123 $conf = new ConfigManager();
 124 $conf->setEmpty('general.timezone', date_default_timezone_get());
 125 $conf->setEmpty('general.title', 'Shared links on '. escape(index_url($_SERVER)));
 126 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 127 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 128
 129 $pluginManager = new PluginManager($conf);
 130 $pluginManager->load($conf->get('general.enabled_plugins'));
 131
 132 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 133
 134 ob_start();  // Output buffering for the page cache.
 135
 136 // In case stupid admin has left magic_quotes enabled in php.ini:
 137 if (get_magic_quotes_gpc())
 138 {
 139     function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
 140     $_POST = array_map('stripslashes_deep', $_POST);
 141     $_GET = array_map('stripslashes_deep', $_GET);
 142     $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
 143 }
 144
 145 // Prevent caching on client side or proxy: (yes, it's ugly)
 146 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 147 header("Cache-Control: no-store, no-cache, must-revalidate");
 148 header("Cache-Control: post-check=0, pre-check=0", false);
 149 header("Pragma: no-cache");
 150
 151 if (! is_file($conf->getConfigFileExt())) {
 152     // Ensure Shaarli has proper access to its resources
 153     $errors = ApplicationUtils::checkResourcePermissions($conf);
 154
 155     if ($errors != array()) {
 156         $message = '<p>Insufficient permissions:</p><ul>';
 157
 158         foreach ($errors as $error) {
 159             $message .= '<li>'.$error.'</li>';
 160         }
 161         $message .= '</ul>';
 162
 163         header('Content-Type: text/html; charset=utf-8');
 164         echo $message;
 165         exit;
 166     }
 167
 168     // Display the installation form if no existing config is found
 169     install($conf);
 170 }
 171
 172 // a token depending of deployment salt, user password, and the current ip
 173 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 174
 175 // Sniff browser language and set date format accordingly.
 176 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 177     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 178 }
 179
 180 /**
 181  * Checking session state (i.e. is the user still logged in)
 182  *
 183  * @param ConfigManager $conf The configuration manager.
 184  *
 185  * @return bool: true if the user is logged in, false otherwise.
 186  */
 187 function setup_login_state($conf)
 188 {
 189         if ($conf->get('security.open_shaarli')) {
 190             return true;
 191         }
 192         $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 193         $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 194         if (! $conf->exists('credentials.login')) {
 195             $userIsLoggedIn = false;  // Shaarli is not configured yet.
 196             $loginFailure = true;
 197         }
 198         if (isset($_COOKIE['shaarli_staySignedIn']) &&
 199             $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 200             !$loginFailure)
 201         {
 202             fillSessionInfo($conf);
 203             $userIsLoggedIn = true;
 204         }
 205         // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 206         if (empty($_SESSION['uid'])
 207         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 208         || time() >= $_SESSION['expires_on'])
 209         {
 210             logout();
 211             $userIsLoggedIn = false;
 212             $loginFailure = true;
 213         }
 214         if (!empty($_SESSION['longlastingsession'])) {
 215             $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 216         }
 217         else {
 218             $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 219         }
 220         if (!$loginFailure) {
 221             $userIsLoggedIn = true;
 222         }
 223
 224         return $userIsLoggedIn;
 225 }
 226 $userIsLoggedIn = setup_login_state($conf);
 227
 228 // ------------------------------------------------------------------------------------------
 229 // Session management
 230
 231 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 232 function allIPs()
 233 {
 234     $ip = $_SERVER['REMOTE_ADDR'];
 235     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 236     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 237     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 238     return $ip;
 239 }
 240
 241 /**
 242  * Load user session.
 243  *
 244  * @param ConfigManager $conf Configuration Manager instance.
 245  */
 246 function fillSessionInfo($conf)
 247 {
 248         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 249         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 250         $_SESSION['username']= $conf->get('credentials.login');
 251         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 252 }
 253
 254 /**
 255  * Check that user/password is correct.
 256  *
 257  * @param string        $login    Username
 258  * @param string        $password User password
 259  * @param ConfigManager $conf     Configuration Manager instance.
 260  *
 261  * @return bool: authentication successful or not.
 262  */
 263 function check_auth($login, $password, $conf)
 264 {
 265     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 266     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 267     {   // Login/password is correct.
 268                 fillSessionInfo($conf);
 269         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 270         return true;
 271     }
 272     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 273     return false;
 274 }
 275
 276 // Returns true if the user is logged in.
 277 function isLoggedIn()
 278 {
 279     global $userIsLoggedIn;
 280     return $userIsLoggedIn;
 281 }
 282
 283 // Force logout.
 284 function logout() {
 285     if (isset($_SESSION)) {
 286         unset($_SESSION['uid']);
 287         unset($_SESSION['ip']);
 288         unset($_SESSION['username']);
 289         unset($_SESSION['privateonly']);
 290         unset($_SESSION['untaggedonly']);
 291     }
 292     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 293 }
 294
 295
 296 // ------------------------------------------------------------------------------------------
 297 // Brute force protection system
 298 // Several consecutive failed logins will ban the IP address for 30 minutes.
 299 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 300     // FIXME! globals
 301     file_put_contents(
 302         $conf->get('resource.ban_file', 'data/ipbans.php'),
 303         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 304     );
 305 }
 306 include $conf->get('resource.ban_file', 'data/ipbans.php');
 307 /**
 308  * Signal a failed login. Will ban the IP if too many failures:
 309  *
 310  * @param ConfigManager $conf Configuration Manager instance.
 311  */
 312 function ban_loginFailed($conf)
 313 {
 314     $ip = $_SERVER['REMOTE_ADDR'];
 315     $trusted = $conf->get('security.trusted_proxies', array());
 316     if (in_array($ip, $trusted)) {
 317         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 318         if (!$ip) {
 319             return;
 320         }
 321     }
 322     $gb = $GLOBALS['IPBANS'];
 323     if (! isset($gb['FAILURES'][$ip])) {
 324         $gb['FAILURES'][$ip]=0;
 325     }
 326     $gb['FAILURES'][$ip]++;
 327     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 328     {
 329         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 330         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 331     }
 332     $GLOBALS['IPBANS'] = $gb;
 333     file_put_contents(
 334         $conf->get('resource.ban_file', 'data/ipbans.php'),
 335         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 336     );
 337 }
 338
 339 /**
 340  * Signals a successful login. Resets failed login counter.
 341  *
 342  * @param ConfigManager $conf Configuration Manager instance.
 343  */
 344 function ban_loginOk($conf)
 345 {
 346     $ip = $_SERVER['REMOTE_ADDR'];
 347     $gb = $GLOBALS['IPBANS'];
 348     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 349     $GLOBALS['IPBANS'] = $gb;
 350     file_put_contents(
 351         $conf->get('resource.ban_file', 'data/ipbans.php'),
 352         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 353     );
 354 }
 355
 356 /**
 357  * Checks if the user CAN login. If 'true', the user can try to login.
 358  *
 359  * @param ConfigManager $conf Configuration Manager instance.
 360  *
 361  * @return bool: true if the user is allowed to login.
 362  */
 363 function ban_canLogin($conf)
 364 {
 365     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 366     if (isset($gb['BANS'][$ip]))
 367     {
 368         // User is banned. Check if the ban has expired:
 369         if ($gb['BANS'][$ip]<=time())
 370         {   // Ban expired, user can try to login again.
 371             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 372             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 373             file_put_contents(
 374                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 375                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 376             );
 377             return true; // Ban has expired, user can login.
 378         }
 379         return false; // User is banned.
 380     }
 381     return true; // User is not banned.
 382 }
 383
 384 // ------------------------------------------------------------------------------------------
 385 // Process login form: Check if login/password is correct.
 386 if (isset($_POST['login']))
 387 {
 388     if (!ban_canLogin($conf)) die('I said: NO. You are banned for the moment. Go away.');
 389     if (isset($_POST['password'])
 390         && tokenOk($_POST['token'])
 391         && (check_auth($_POST['login'], $_POST['password'], $conf))
 392     ) {   // Login/password is OK.
 393         ban_loginOk($conf);
 394         // If user wants to keep the session cookie even after the browser closes:
 395         if (!empty($_POST['longlastingsession']))
 396         {
 397                         setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
 398             $_SESSION['longlastingsession']=31536000;  // (31536000 seconds = 1 year)
 399             $_SESSION['expires_on']=time()+$_SESSION['longlastingsession'];  // Set session expiration on server-side.
 400
 401             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 402             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 403             // Note: Never forget the trailing slash on the cookie path!
 404             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 405         }
 406         else // Standard session expiration (=when browser closes)
 407         {
 408             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 409             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 410             session_regenerate_id(true);
 411         }
 412
 413         // Optional redirect after login:
 414         if (isset($_GET['post'])) {
 415             $uri = '?post='. urlencode($_GET['post']);
 416             foreach (array('description', 'source', 'title', 'tags') as $param) {
 417                 if (!empty($_GET[$param])) {
 418                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 419                 }
 420             }
 421             header('Location: '. $uri);
 422             exit;
 423         }
 424
 425         if (isset($_GET['edit_link'])) {
 426             header('Location: ?edit_link='. escape($_GET['edit_link']));
 427             exit;
 428         }
 429
 430         if (isset($_POST['returnurl'])) {
 431             // Prevent loops over login screen.
 432             if (strpos($_POST['returnurl'], 'do=login') === false) {
 433                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 434                 exit;
 435             }
 436         }
 437         header('Location: ?'); exit;
 438     }
 439     else
 440     {
 441         ban_loginFailed($conf);
 442         $redir = '&username='. $_POST['login'];
 443         if (isset($_GET['post'])) {
 444             $redir .= '&post=' . urlencode($_GET['post']);
 445             foreach (array('description', 'source', 'title', 'tags') as $param) {
 446                 if (!empty($_GET[$param])) {
 447                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 448                 }
 449             }
 450         }
 451         echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
 452         exit;
 453     }
 454 }
 455
 456 // ------------------------------------------------------------------------------------------
 457 // Token management for XSRF protection
 458 // Token should be used in any form which acts on data (create,update,delete,import...).
 459 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 460
 461 /**
 462  * Returns a token.
 463  *
 464  * @param ConfigManager $conf Configuration Manager instance.
 465  *
 466  * @return string token.
 467  */
 468 function getToken($conf)
 469 {
 470     $rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt'));  // We generate a random string.
 471     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 472     return $rnd;
 473 }
 474
 475 // Tells if a token is OK. Using this function will destroy the token.
 476 // true=token is OK.
 477 function tokenOk($token)
 478 {
 479     if (isset($_SESSION['tokens'][$token]))
 480     {
 481         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 482         return true; // Token is OK.
 483     }
 484     return false; // Wrong token, or already used.
 485 }
 486
 487 /**
 488  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 489  * Gives the last 7 days (which have links).
 490  * This RSS feed cannot be filtered.
 491  *
 492  * @param ConfigManager $conf Configuration Manager instance.
 493  */
 494 function showDailyRSS($conf) {
 495     // Cache system
 496     $query = $_SERVER['QUERY_STRING'];
 497     $cache = new CachedPage(
 498         $conf->get('config.PAGE_CACHE'),
 499         page_url($_SERVER),
 500         startsWith($query,'do=dailyrss') && !isLoggedIn()
 501     );
 502     $cached = $cache->cachedVersion();
 503     if (!empty($cached)) {
 504         echo $cached;
 505         exit;
 506     }
 507
 508     // If cached was not found (or not usable), then read the database and build the response:
 509     // Read links from database (and filter private links if used it not logged in).
 510     $LINKSDB = new LinkDB(
 511         $conf->get('resource.datastore'),
 512         isLoggedIn(),
 513         $conf->get('privacy.hide_public_links'),
 514         $conf->get('redirector.url'),
 515         $conf->get('redirector.encode_url')
 516     );
 517
 518     /* Some Shaarlies may have very few links, so we need to look
 519        back in time until we have enough days ($nb_of_days).
 520     */
 521     $nb_of_days = 7; // We take 7 days.
 522     $today = date('Ymd');
 523     $days = array();
 524
 525     foreach ($LINKSDB as $link) {
 526         $day = $link['created']->format('Ymd'); // Extract day (without time)
 527         if (strcmp($day, $today) < 0) {
 528             if (empty($days[$day])) {
 529                 $days[$day] = array();
 530             }
 531             $days[$day][] = $link;
 532         }
 533
 534         if (count($days) > $nb_of_days) {
 535             break; // Have we collected enough days?
 536         }
 537     }
 538
 539     // Build the RSS feed.
 540     header('Content-Type: application/rss+xml; charset=utf-8');
 541     $pageaddr = escape(index_url($_SERVER));
 542     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 543     echo '<channel>';
 544     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 545     echo '<link>'. $pageaddr .'</link>';
 546     echo '<description>Daily shared links</description>';
 547     echo '<language>en-en</language>';
 548     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 549
 550     // For each day.
 551     foreach ($days as $day => $links) {
 552         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 553         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 554
 555         // We pre-format some fields for proper output.
 556         foreach ($links as &$link) {
 557             $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 558             $link['thumbnail'] = thumbnail($conf, $link['url']);
 559             $link['timestamp'] = $link['created']->getTimestamp();
 560             if (startsWith($link['url'], '?')) {
 561                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 562             }
 563         }
 564
 565         // Then build the HTML for this day:
 566         $tpl = new RainTPL;
 567         $tpl->assign('title', $conf->get('general.title'));
 568         $tpl->assign('daydate', $dayDate->getTimestamp());
 569         $tpl->assign('absurl', $absurl);
 570         $tpl->assign('links', $links);
 571         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 572         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 573         $html = $tpl->draw('dailyrss', true);
 574
 575         echo $html . PHP_EOL;
 576     }
 577     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 578
 579     $cache->cache(ob_get_contents());
 580     ob_end_flush();
 581     exit;
 582 }
 583
 584 /**
 585  * Show the 'Daily' page.
 586  *
 587  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 588  * @param LinkDB        $LINKSDB       LinkDB instance.
 589  * @param ConfigManager $conf          Configuration Manager instance.
 590  * @param PluginManager $pluginManager Plugin Manager instane.
 591  */
 592 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 593 {
 594     $day=date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 595     if (isset($_GET['day'])) $day=$_GET['day'];
 596
 597     $days = $LINKSDB->days();
 598     $i = array_search($day,$days);
 599     if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
 600     $previousday='';
 601     $nextday='';
 602     if ($i!==false)
 603     {
 604         if ($i>=1) $previousday=$days[$i-1];
 605         if ($i<count($days)-1) $nextday=$days[$i+1];
 606     }
 607
 608     try {
 609         $linksToDisplay = $LINKSDB->filterDay($day);
 610     } catch (Exception $exc) {
 611         error_log($exc);
 612         $linksToDisplay = array();
 613     }
 614
 615     // We pre-format some fields for proper output.
 616     foreach($linksToDisplay as $key=>$link)
 617     {
 618
 619         $taglist = explode(' ',$link['tags']);
 620         uasort($taglist, 'strcasecmp');
 621         $linksToDisplay[$key]['taglist']=$taglist;
 622         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 623         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 624         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 625     }
 626
 627     /* We need to spread the articles on 3 columns.
 628        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 629        so I manually spread entries with a simple method: I roughly evaluate the
 630        height of a div according to title and description length.
 631     */
 632     $columns=array(array(),array(),array()); // Entries to display, for each column.
 633     $fill=array(0,0,0);  // Rough estimate of columns fill.
 634     foreach($linksToDisplay as $key=>$link)
 635     {
 636         // Roughly estimate length of entry (by counting characters)
 637         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 638         // Description: 836 characters gives roughly 342 pixel height.
 639         // This is not perfect, but it's usually OK.
 640         $length=strlen($link['title'])+(342*strlen($link['description']))/836;
 641         if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
 642         // Then put in column which is the less filled:
 643         $smallest=min($fill); // find smallest value in array.
 644         $index=array_search($smallest,$fill); // find index of this smallest value.
 645         array_push($columns[$index],$link); // Put entry in this column.
 646         $fill[$index]+=$length;
 647     }
 648
 649     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 650     $data = array(
 651         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 652         'linksToDisplay' => $linksToDisplay,
 653         'cols' => $columns,
 654         'day' => $dayDate->getTimestamp(),
 655         'dayDate' => $dayDate,
 656         'previousday' => $previousday,
 657         'nextday' => $nextday,
 658     );
 659
 660     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 661
 662     foreach ($data as $key => $value) {
 663         $pageBuilder->assign($key, $value);
 664     }
 665
 666     $pageBuilder->renderPage('daily');
 667     exit;
 668 }
 669
 670 /**
 671  * Renders the linklist
 672  *
 673  * @param pageBuilder   $PAGE    pageBuilder instance.
 674  * @param LinkDB        $LINKSDB LinkDB instance.
 675  * @param ConfigManager $conf    Configuration Manager instance.
 676  * @param PluginManager $pluginManager Plugin Manager instance.
 677  */
 678 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 679     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 680     $PAGE->renderPage('linklist');
 681 }
 682
 683 /**
 684  * Render HTML page (according to URL parameters and user rights)
 685  *
 686  * @param ConfigManager $conf          Configuration Manager instance.
 687  * @param PluginManager $pluginManager Plugin Manager instance,
 688  * @param LinkDB        $LINKSDB
 689  */
 690 function renderPage($conf, $pluginManager, $LINKSDB, $history)
 691 {
 692     $updater = new Updater(
 693         read_updates_file($conf->get('resource.updates')),
 694         $LINKSDB,
 695         $conf,
 696         isLoggedIn()
 697     );
 698     try {
 699         $newUpdates = $updater->update();
 700         if (! empty($newUpdates)) {
 701             write_updates_file(
 702                 $conf->get('resource.updates'),
 703                 $updater->getDoneUpdates()
 704             );
 705         }
 706     }
 707     catch(Exception $e) {
 708         die($e->getMessage());
 709     }
 710
 711     $PAGE = new PageBuilder($conf, $LINKSDB);
 712     $PAGE->assign('linkcount', count($LINKSDB));
 713     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 714     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 715
 716     // Determine which page will be rendered.
 717     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 718     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 719
 720     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 721     // Then assign generated data to RainTPL.
 722     $common_hooks = array(
 723         'includes',
 724         'header',
 725         'footer',
 726     );
 727
 728     foreach($common_hooks as $name) {
 729         $plugin_data = array();
 730         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 731             array(
 732                 'target' => $targetPage,
 733                 'loggedin' => isLoggedIn()
 734             )
 735         );
 736         $PAGE->assign('plugins_' . $name, $plugin_data);
 737     }
 738
 739     // -------- Display login form.
 740     if ($targetPage == Router::$PAGE_LOGIN)
 741     {
 742         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 743         if (isset($_GET['username'])) {
 744             $PAGE->assign('username', escape($_GET['username']));
 745         }
 746         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 747         $PAGE->renderPage('loginform');
 748         exit;
 749     }
 750     // -------- User wants to logout.
 751     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 752     {
 753         invalidateCaches($conf->get('resource.page_cache'));
 754         logout();
 755         header('Location: ?');
 756         exit;
 757     }
 758
 759     // -------- Picture wall
 760     if ($targetPage == Router::$PAGE_PICWALL)
 761     {
 762         // Optionally filter the results:
 763         $links = $LINKSDB->filterSearch($_GET);
 764         $linksToDisplay = array();
 765
 766         // Get only links which have a thumbnail.
 767         foreach($links as $link)
 768         {
 769             $permalink='?'.$link['shorturl'];
 770             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 771             if ($thumb!='') // Only output links which have a thumbnail.
 772             {
 773                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 774                 $linksToDisplay[]=$link; // Add to array.
 775             }
 776         }
 777
 778         $data = array(
 779             'linksToDisplay' => $linksToDisplay,
 780         );
 781         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 782
 783         foreach ($data as $key => $value) {
 784             $PAGE->assign($key, $value);
 785         }
 786
 787         $PAGE->renderPage('picwall');
 788         exit;
 789     }
 790
 791     // -------- Tag cloud
 792     if ($targetPage == Router::$PAGE_TAGCLOUD)
 793     {
 794         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 795         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 796         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 797
 798         // We sort tags alphabetically, then choose a font size according to count.
 799         // First, find max value.
 800         $maxcount = 0;
 801         foreach ($tags as $value) {
 802             $maxcount = max($maxcount, $value);
 803         }
 804
 805         alphabetical_sort($tags, true, true);
 806
 807         $tagList = array();
 808         foreach($tags as $key => $value) {
 809             if (in_array($key, $filteringTags)) {
 810                 continue;
 811             }
 812             // Tag font size scaling:
 813             //   default 15 and 30 logarithm bases affect scaling,
 814             //   22 and 6 are arbitrary font sizes for max and min sizes.
 815             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 816             $tagList[$key] = array(
 817                 'count' => $value,
 818                 'size' => number_format($size, 2, '.', ''),
 819             );
 820         }
 821
 822         $data = array(
 823             'search_tags' => implode(' ', $filteringTags),
 824             'tags' => $tagList,
 825         );
 826         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 827
 828         foreach ($data as $key => $value) {
 829             $PAGE->assign($key, $value);
 830         }
 831
 832         $PAGE->renderPage('tag.cloud');
 833         exit;
 834     }
 835
 836     // -------- Tag list
 837     if ($targetPage == Router::$PAGE_TAGLIST)
 838     {
 839         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 840         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 841         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 842         foreach ($filteringTags as $tag) {
 843             if (array_key_exists($tag, $tags)) {
 844                 unset($tags[$tag]);
 845             }
 846         }
 847
 848         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 849             alphabetical_sort($tags, false, true);
 850         }
 851
 852         $data = [
 853             'search_tags' => implode(' ', $filteringTags),
 854             'tags' => $tags,
 855         ];
 856         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 857
 858         foreach ($data as $key => $value) {
 859             $PAGE->assign($key, $value);
 860         }
 861
 862         $PAGE->renderPage('tag.list');
 863         exit;
 864     }
 865
 866     // Daily page.
 867     if ($targetPage == Router::$PAGE_DAILY) {
 868         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 869     }
 870
 871     // ATOM and RSS feed.
 872     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 873         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 874         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 875
 876         // Cache system
 877         $query = $_SERVER['QUERY_STRING'];
 878         $cache = new CachedPage(
 879             $conf->get('resource.page_cache'),
 880             page_url($_SERVER),
 881             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 882         );
 883         $cached = $cache->cachedVersion();
 884         if (!empty($cached)) {
 885             echo $cached;
 886             exit;
 887         }
 888
 889         // Generate data.
 890         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 891         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 892         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 893         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 894         $data = $feedGenerator->buildData();
 895
 896         // Process plugin hook.
 897         $pluginManager->executeHooks('render_feed', $data, array(
 898             'loggedin' => isLoggedIn(),
 899             'target' => $targetPage,
 900         ));
 901
 902         // Render the template.
 903         $PAGE->assignAll($data);
 904         $PAGE->renderPage('feed.'. $feedType);
 905         $cache->cache(ob_get_contents());
 906         ob_end_flush();
 907         exit;
 908     }
 909
 910     // Display opensearch plugin (XML)
 911     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 912         header('Content-Type: application/xml; charset=utf-8');
 913         $PAGE->assign('serverurl', index_url($_SERVER));
 914         $PAGE->renderPage('opensearch');
 915         exit;
 916     }
 917
 918     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 919     if (isset($_GET['addtag']))
 920     {
 921         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 922         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 923         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 924
 925         // Prevent redirection loop
 926         if (isset($params['addtag'])) {
 927             unset($params['addtag']);
 928         }
 929
 930         // Check if this tag is already in the search query and ignore it if it is.
 931         // Each tag is always separated by a space
 932         if (isset($params['searchtags'])) {
 933             $current_tags = explode(' ', $params['searchtags']);
 934         } else {
 935             $current_tags = array();
 936         }
 937         $addtag = true;
 938         foreach ($current_tags as $value) {
 939             if ($value === $_GET['addtag']) {
 940                 $addtag = false;
 941                 break;
 942             }
 943         }
 944         // Append the tag if necessary
 945         if (empty($params['searchtags'])) {
 946             $params['searchtags'] = trim($_GET['addtag']);
 947         }
 948         else if ($addtag) {
 949             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 950         }
 951
 952         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 953         header('Location: ?'.http_build_query($params));
 954         exit;
 955     }
 956
 957     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 958     if (isset($_GET['removetag'])) {
 959         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 960         if (empty($_SERVER['HTTP_REFERER'])) {
 961             header('Location: ?');
 962             exit;
 963         }
 964
 965         // In case browser does not send HTTP_REFERER
 966         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 967
 968         // Prevent redirection loop
 969         if (isset($params['removetag'])) {
 970             unset($params['removetag']);
 971         }
 972
 973         if (isset($params['searchtags'])) {
 974             $tags = explode(' ', $params['searchtags']);
 975             // Remove value from array $tags.
 976             $tags = array_diff($tags, array($_GET['removetag']));
 977             $params['searchtags'] = implode(' ',$tags);
 978
 979             if (empty($params['searchtags'])) {
 980                 unset($params['searchtags']);
 981             }
 982
 983             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 984         }
 985         header('Location: ?'.http_build_query($params));
 986         exit;
 987     }
 988
 989     // -------- User wants to change the number of links per page (linksperpage=...)
 990     if (isset($_GET['linksperpage'])) {
 991         if (is_numeric($_GET['linksperpage'])) {
 992             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 993         }
 994
 995         if (! empty($_SERVER['HTTP_REFERER'])) {
 996             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 997         } else {
 998             $location = '?';
 999         }
1000         header('Location: '. $location);
1001         exit;
1002     }
1003
1004     // -------- User wants to see only private links (toggle)
1005     if (isset($_GET['privateonly'])) {
1006         if (empty($_SESSION['privateonly'])) {
1007             $_SESSION['privateonly'] = 1; // See only private links
1008         } else {
1009             unset($_SESSION['privateonly']); // See all links
1010         }
1011
1012         if (! empty($_SERVER['HTTP_REFERER'])) {
1013             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1014         } else {
1015             $location = '?';
1016         }
1017         header('Location: '. $location);
1018         exit;
1019     }
1020
1021     // -------- User wants to see only untagged links (toggle)
1022     if (isset($_GET['untaggedonly'])) {
1023         $_SESSION['untaggedonly'] = !$_SESSION['untaggedonly'];
1024
1025         if (! empty($_SERVER['HTTP_REFERER'])) {
1026             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1027         } else {
1028             $location = '?';
1029         }
1030         header('Location: '. $location);
1031         exit;
1032     }
1033
1034     // -------- Handle other actions allowed for non-logged in users:
1035     if (!isLoggedIn())
1036     {
1037         // User tries to post new link but is not logged in:
1038         // Show login screen, then redirect to ?post=...
1039         if (isset($_GET['post']))
1040         {
1041             header( // Redirect to login page, then back to post link.
1042                 'Location: ?do=login&post='.urlencode($_GET['post']).
1043                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1044                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1045                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1046                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1047             );
1048             exit;
1049         }
1050
1051         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1052         if (isset($_GET['edit_link'])) {
1053             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1054             exit;
1055         }
1056
1057         exit; // Never remove this one! All operations below are reserved for logged in user.
1058     }
1059
1060     // -------- All other functions are reserved for the registered user:
1061
1062     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1063     if ($targetPage == Router::$PAGE_TOOLS)
1064     {
1065         $data = array(
1066             'pageabsaddr' => index_url($_SERVER),
1067             'sslenabled' => !empty($_SERVER['HTTPS'])
1068         );
1069         $pluginManager->executeHooks('render_tools', $data);
1070
1071         foreach ($data as $key => $value) {
1072             $PAGE->assign($key, $value);
1073         }
1074
1075         $PAGE->renderPage('tools');
1076         exit;
1077     }
1078
1079     // -------- User wants to change his/her password.
1080     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1081     {
1082         if ($conf->get('security.open_shaarli')) {
1083             die('You are not supposed to change a password on an Open Shaarli.');
1084         }
1085
1086         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1087         {
1088             if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1089
1090             // Make sure old password is correct.
1091             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1092             if ($oldhash!= $conf->get('credentials.hash')) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1093             // Save new password
1094             // Salt renders rainbow-tables attacks useless.
1095             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1096             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1097             try {
1098                 $conf->write(isLoggedIn());
1099             }
1100             catch(Exception $e) {
1101                 error_log(
1102                     'ERROR while writing config file after changing password.' . PHP_EOL .
1103                     $e->getMessage()
1104                 );
1105
1106                 // TODO: do not handle exceptions/errors in JS.
1107                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1108                 exit;
1109             }
1110             echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1111             exit;
1112         }
1113         else // show the change password form.
1114         {
1115             $PAGE->renderPage('changepassword');
1116             exit;
1117         }
1118     }
1119
1120     // -------- User wants to change configuration
1121     if ($targetPage == Router::$PAGE_CONFIGURE)
1122     {
1123         if (!empty($_POST['title']) )
1124         {
1125             if (!tokenOk($_POST['token'])) {
1126                 die('Wrong token.'); // Go away!
1127             }
1128             $tz = 'UTC';
1129             if (!empty($_POST['continent']) && !empty($_POST['city'])
1130                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1131             ) {
1132                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1133             }
1134             $conf->set('general.timezone', $tz);
1135             $conf->set('general.title', escape($_POST['title']));
1136             $conf->set('general.header_link', escape($_POST['titleLink']));
1137             $conf->set('resource.theme', escape($_POST['theme']));
1138             $conf->set('redirector.url', escape($_POST['redirector']));
1139             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1140             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1141             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1142             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1143             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1144             $conf->set('api.enabled', !empty($_POST['enableApi']));
1145             $conf->set('api.secret', escape($_POST['apiSecret']));
1146             try {
1147                 $conf->write(isLoggedIn());
1148                 $history->updateSettings();
1149                 invalidateCaches($conf->get('resource.page_cache'));
1150             }
1151             catch(Exception $e) {
1152                 error_log(
1153                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1154                     $e->getMessage()
1155                 );
1156
1157                 // TODO: do not handle exceptions/errors in JS.
1158                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1159                 exit;
1160             }
1161             echo '<script>alert("Configuration was saved.");document.location=\'?do=configure\';</script>';
1162             exit;
1163         }
1164         else // Show the configuration form.
1165         {
1166             $PAGE->assign('title', $conf->get('general.title'));
1167             $PAGE->assign('theme', $conf->get('resource.theme'));
1168             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1169             $PAGE->assign('redirector', $conf->get('redirector.url'));
1170             list($continents, $cities) = generateTimeZoneData(
1171                 timezone_identifiers_list(),
1172                 $conf->get('general.timezone')
1173             );
1174             $PAGE->assign('continents', $continents);
1175             $PAGE->assign('cities', $cities);
1176             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1177             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1178             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1179             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1180             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1181             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1182             $PAGE->assign('api_secret', $conf->get('api.secret'));
1183             $PAGE->renderPage('configure');
1184             exit;
1185         }
1186     }
1187
1188     // -------- User wants to rename a tag or delete it
1189     if ($targetPage == Router::$PAGE_CHANGETAG)
1190     {
1191         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1192             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1193             $PAGE->renderPage('changetag');
1194             exit;
1195         }
1196
1197         if (!tokenOk($_POST['token'])) {
1198             die('Wrong token.');
1199         }
1200
1201         // Delete a tag:
1202         if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
1203             $needle = trim($_POST['fromtag']);
1204             // True for case-sensitive tag search.
1205             $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1206             foreach($linksToAlter as $key=>$value)
1207             {
1208                 $tags = explode(' ',trim($value['tags']));
1209                 unset($tags[array_search($needle,$tags)]); // Remove tag.
1210                 $value['tags']=trim(implode(' ',$tags));
1211                 $LINKSDB[$key]=$value;
1212                 $history->updateLink($LINKSDB[$key]);
1213             }
1214             $LINKSDB->save($conf->get('resource.page_cache'));
1215             echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?do=changetag\';</script>';
1216             exit;
1217         }
1218
1219         // Rename a tag:
1220         if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
1221             $needle = trim($_POST['fromtag']);
1222             // True for case-sensitive tag search.
1223             $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1224             foreach($linksToAlter as $key=>$value) {
1225                 $tags = preg_split('/\s+/', trim($value['tags']));
1226                 // Replace tags value.
1227                 $tags[array_search($needle, $tags)] = trim($_POST['totag']);
1228                 $value['tags'] = implode(' ', array_unique($tags));
1229                 $LINKSDB[$key] = $value;
1230                 $history->updateLink($LINKSDB[$key]);
1231             }
1232             $LINKSDB->save($conf->get('resource.page_cache')); // Save to disk.
1233             echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode(escape($_POST['totag'])).'\';</script>';
1234             exit;
1235         }
1236     }
1237
1238     // -------- User wants to add a link without using the bookmarklet: Show form.
1239     if ($targetPage == Router::$PAGE_ADDLINK)
1240     {
1241         $PAGE->renderPage('addlink');
1242         exit;
1243     }
1244
1245     // -------- User clicked the "Save" button when editing a link: Save link to database.
1246     if (isset($_POST['save_edit']))
1247     {
1248         // Go away!
1249         if (! tokenOk($_POST['token'])) {
1250             die('Wrong token.');
1251         }
1252
1253         // lf_id should only be present if the link exists.
1254         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1255         // Linkdate is kept here to:
1256         //   - use the same permalink for notes as they're displayed when creating them
1257         //   - let users hack creation date of their posts
1258         //     See: https://github.com/shaarli/Shaarli/wiki/Datastore-hacks#changing-the-timestamp-for-a-link
1259         $linkdate = escape($_POST['lf_linkdate']);
1260         if (isset($LINKSDB[$id])) {
1261             // Edit
1262             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1263             $updated = new DateTime();
1264             $shortUrl = $LINKSDB[$id]['shorturl'];
1265             $new = false;
1266         } else {
1267             // New link
1268             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1269             $updated = null;
1270             $shortUrl = link_small_hash($created, $id);
1271             $new = true;
1272         }
1273
1274         // Remove multiple spaces.
1275         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1276         // Remove first '-' char in tags.
1277         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1278         // Remove duplicates.
1279         $tags = implode(' ', array_unique(explode(' ', $tags)));
1280
1281         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1282
1283         $link = array(
1284             'id' => $id,
1285             'title' => trim($_POST['lf_title']),
1286             'url' => $url,
1287             'description' => $_POST['lf_description'],
1288             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1289             'created' => $created,
1290             'updated' => $updated,
1291             'tags' => str_replace(',', ' ', $tags),
1292             'shorturl' => $shortUrl,
1293         );
1294
1295         // If title is empty, use the URL as title.
1296         if ($link['title'] == '') {
1297             $link['title'] = $link['url'];
1298         }
1299
1300         $pluginManager->executeHooks('save_link', $link);
1301
1302         $LINKSDB[$id] = $link;
1303         $LINKSDB->save($conf->get('resource.page_cache'));
1304         if ($new) {
1305             $history->addLink($link);
1306         } else {
1307             $history->updateLink($link);
1308         }
1309
1310         // If we are called from the bookmarklet, we must close the popup:
1311         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1312             echo '<script>self.close();</script>';
1313             exit;
1314         }
1315
1316         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1317         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1318         // Scroll to the link which has been edited.
1319         $location .= '#' . $link['shorturl'];
1320         // After saving the link, redirect to the page the user was on.
1321         header('Location: '. $location);
1322         exit;
1323     }
1324
1325     // -------- User clicked the "Cancel" button when editing a link.
1326     if (isset($_POST['cancel_edit']))
1327     {
1328         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1329         if (! isset($LINKSDB[$id])) {
1330             header('Location: ?');
1331         }
1332         // If we are called from the bookmarklet, we must close the popup:
1333         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1334         $link = $LINKSDB[$id];
1335         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1336         // Scroll to the link which has been edited.
1337         $returnurl .= '#'. $link['shorturl'];
1338         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1339         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1340         exit;
1341     }
1342
1343     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1344     if ($targetPage == Router::$PAGE_DELETELINK)
1345     {
1346         if (! tokenOk($_GET['token'])) {
1347             die('Wrong token.');
1348         }
1349
1350         if (strpos($_GET['lf_linkdate'], ' ') !== false) {
1351             $ids = array_values(array_filter(preg_split('/\s+/', escape($_GET['lf_linkdate']))));
1352         } else {
1353             $ids = [$_GET['lf_linkdate']];
1354         }
1355         foreach ($ids as $id) {
1356             $id = (int) escape($id);
1357             $link = $LINKSDB[$id];
1358             $pluginManager->executeHooks('delete_link', $link);
1359             unset($LINKSDB[$id]);
1360         }
1361         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1362         $history->deleteLink($link);
1363
1364         // If we are called from the bookmarklet, we must close the popup:
1365         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1366
1367         $location = '?';
1368         if (isset($_SERVER['HTTP_REFERER'])) {
1369             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1370             $location = generateLocation(
1371                     $_SERVER['HTTP_REFERER'],
1372                     $_SERVER['HTTP_HOST'],
1373                     ['delete_link', 'edit_link', $link['shorturl']]
1374             );
1375         }
1376
1377         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1378         exit;
1379     }
1380
1381     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1382     if (isset($_GET['edit_link']))
1383     {
1384         $id = (int) escape($_GET['edit_link']);
1385         $link = $LINKSDB[$id];  // Read database
1386         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1387         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1388         $data = array(
1389             'link' => $link,
1390             'link_is_new' => false,
1391             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1392             'tags' => $LINKSDB->linksCountPerTag(),
1393         );
1394         $pluginManager->executeHooks('render_editlink', $data);
1395
1396         foreach ($data as $key => $value) {
1397             $PAGE->assign($key, $value);
1398         }
1399
1400         $PAGE->renderPage('editlink');
1401         exit;
1402     }
1403
1404     // -------- User want to post a new link: Display link edit form.
1405     if (isset($_GET['post'])) {
1406         $url = cleanup_url($_GET['post']);
1407
1408         $link_is_new = false;
1409         // Check if URL is not already in database (in this case, we will edit the existing link)
1410         $link = $LINKSDB->getLinkFromUrl($url);
1411         if (! $link)
1412         {
1413             $link_is_new = true;
1414             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1415             // Get title if it was provided in URL (by the bookmarklet).
1416             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1417             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1418             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1419             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1420             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1421             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1422             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1423                 // Short timeout to keep the application responsive
1424                 list($headers, $content) = get_http_response($url, 4);
1425                 if (strpos($headers[0], '200 OK') !== false) {
1426                     // Retrieve charset.
1427                     $charset = get_charset($headers, $content);
1428                     // Extract title.
1429                     $title = html_extract_title($content);
1430                     // Re-encode title in utf-8 if necessary.
1431                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1432                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1433                     }
1434                 }
1435             }
1436
1437             if ($url == '') {
1438                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1439                 $title = 'Note: ';
1440             }
1441             $url = escape($url);
1442             $title = escape($title);
1443
1444             $link = array(
1445                 'linkdate' => $linkdate,
1446                 'title' => $title,
1447                 'url' => $url,
1448                 'description' => $description,
1449                 'tags' => $tags,
1450                 'private' => $private,
1451             );
1452         } else {
1453             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1454         }
1455
1456         $data = array(
1457             'link' => $link,
1458             'link_is_new' => $link_is_new,
1459             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1460             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1461             'tags' => $LINKSDB->linksCountPerTag(),
1462             'default_private_links' => $conf->get('privacy.default_private_links', false),
1463         );
1464         $pluginManager->executeHooks('render_editlink', $data);
1465
1466         foreach ($data as $key => $value) {
1467             $PAGE->assign($key, $value);
1468         }
1469
1470         $PAGE->renderPage('editlink');
1471         exit;
1472     }
1473
1474     if ($targetPage == Router::$PAGE_EXPORT) {
1475         // Export links as a Netscape Bookmarks file
1476
1477         if (empty($_GET['selection'])) {
1478             $PAGE->renderPage('export');
1479             exit;
1480         }
1481
1482         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1483         $selection = $_GET['selection'];
1484         if (isset($_GET['prepend_note_url'])) {
1485             $prependNoteUrl = $_GET['prepend_note_url'];
1486         } else {
1487             $prependNoteUrl = false;
1488         }
1489
1490         try {
1491             $PAGE->assign(
1492                 'links',
1493                 NetscapeBookmarkUtils::filterAndFormat(
1494                     $LINKSDB,
1495                     $selection,
1496                     $prependNoteUrl,
1497                     index_url($_SERVER)
1498                 )
1499             );
1500         } catch (Exception $exc) {
1501             header('Content-Type: text/plain; charset=utf-8');
1502             echo $exc->getMessage();
1503             exit;
1504         }
1505         $now = new DateTime();
1506         header('Content-Type: text/html; charset=utf-8');
1507         header(
1508             'Content-disposition: attachment; filename=bookmarks_'
1509            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1510         );
1511         $PAGE->assign('date', $now->format(DateTime::RFC822));
1512         $PAGE->assign('eol', PHP_EOL);
1513         $PAGE->assign('selection', $selection);
1514         $PAGE->renderPage('export.bookmarks');
1515         exit;
1516     }
1517
1518     if ($targetPage == Router::$PAGE_IMPORT) {
1519         // Upload a Netscape bookmark dump to import its contents
1520
1521         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1522             // Show import dialog
1523             $PAGE->assign(
1524                 'maxfilesize',
1525                 get_max_upload_size(
1526                     ini_get('post_max_size'),
1527                     ini_get('upload_max_filesize'),
1528                     false
1529                 )
1530             );
1531             $PAGE->assign(
1532                 'maxfilesizeHuman',
1533                 get_max_upload_size(
1534                     ini_get('post_max_size'),
1535                     ini_get('upload_max_filesize'),
1536                     true
1537                 )
1538             );
1539             $PAGE->renderPage('import');
1540             exit;
1541         }
1542
1543         // Import bookmarks from an uploaded file
1544         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1545             // The file is too big or some form field may be missing.
1546             echo '<script>alert("The file you are trying to upload is probably'
1547                 .' bigger than what this webserver can accept ('
1548                 .get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize')).').'
1549                 .' Please upload in smaller chunks.");document.location=\'?do='
1550                 .Router::$PAGE_IMPORT .'\';</script>';
1551             exit;
1552         }
1553         if (! tokenOk($_POST['token'])) {
1554             die('Wrong token.');
1555         }
1556         $status = NetscapeBookmarkUtils::import(
1557             $_POST,
1558             $_FILES,
1559             $LINKSDB,
1560             $conf,
1561             $history
1562         );
1563         echo '<script>alert("'.$status.'");document.location=\'?do='
1564              .Router::$PAGE_IMPORT .'\';</script>';
1565         exit;
1566     }
1567
1568     // Plugin administration page
1569     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1570         $pluginMeta = $pluginManager->getPluginsMeta();
1571
1572         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1573         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1574         // Load parameters.
1575         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1576         uasort(
1577             $enabledPlugins,
1578             function($a, $b) { return $a['order'] - $b['order']; }
1579         );
1580         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1581
1582         $PAGE->assign('enabledPlugins', $enabledPlugins);
1583         $PAGE->assign('disabledPlugins', $disabledPlugins);
1584         $PAGE->renderPage('pluginsadmin');
1585         exit;
1586     }
1587
1588     // Plugin administration form action
1589     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1590         try {
1591             if (isset($_POST['parameters_form'])) {
1592                 unset($_POST['parameters_form']);
1593                 foreach ($_POST as $param => $value) {
1594                     $conf->set('plugins.'. $param, escape($value));
1595                 }
1596             }
1597             else {
1598                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1599             }
1600             $conf->write(isLoggedIn());
1601             $history->updateSettings();
1602         }
1603         catch (Exception $e) {
1604             error_log(
1605                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1606                 $e->getMessage()
1607             );
1608
1609             // TODO: do not handle exceptions/errors in JS.
1610             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1611             exit;
1612         }
1613         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1614         exit;
1615     }
1616
1617     // Get a fresh token
1618     if ($targetPage == Router::$GET_TOKEN) {
1619         header('Content-Type:text/plain');
1620         echo getToken($conf);
1621         exit;
1622     }
1623
1624     // -------- Otherwise, simply display search form and links:
1625     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1626     exit;
1627 }
1628
1629 /**
1630  * Template for the list of links (<div id="linklist">)
1631  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1632  *
1633  * @param pageBuilder   $PAGE          pageBuilder instance.
1634  * @param LinkDB        $LINKSDB       LinkDB instance.
1635  * @param ConfigManager $conf          Configuration Manager instance.
1636  * @param PluginManager $pluginManager Plugin Manager instance.
1637  */
1638 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1639 {
1640     // Used in templates
1641     if (isset($_GET['searchtags'])) {
1642         if (! empty($_GET['searchtags'])) {
1643             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1644         } else {
1645             $searchtags = false;
1646         }
1647     } else {
1648         $searchtags = '';
1649     }
1650     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1651
1652     // Smallhash filter
1653     if (! empty($_SERVER['QUERY_STRING'])
1654         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1655         try {
1656             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1657         } catch (LinkNotFoundException $e) {
1658             $PAGE->render404($e->getMessage());
1659             exit;
1660         }
1661     } else {
1662         // Filter links according search parameters.
1663         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1664         $request = [
1665             'searchtags' => $searchtags,
1666             'searchterm' => $searchterm,
1667         ];
1668         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1669     }
1670
1671     // ---- Handle paging.
1672     $keys = array();
1673     foreach ($linksToDisplay as $key => $value) {
1674         $keys[] = $key;
1675     }
1676
1677
1678
1679     // Select articles according to paging.
1680     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1681     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1682     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1683     $page = $page < 1 ? 1 : $page;
1684     $page = $page > $pagecount ? $pagecount : $page;
1685     // Start index.
1686     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1687     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1688     $linkDisp = array();
1689     while ($i<$end && $i<count($keys))
1690     {
1691         $link = $linksToDisplay[$keys[$i]];
1692         $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1693         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1694         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1695         $link['timestamp'] = $link['created']->getTimestamp();
1696         if (! empty($link['updated'])) {
1697             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1698         } else {
1699             $link['updated_timestamp'] = '';
1700         }
1701         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1702         uasort($taglist, 'strcasecmp');
1703         $link['taglist'] = $taglist;
1704         // Check for both signs of a note: starting with ? and 7 chars long.
1705         if ($link['url'][0] === '?' &&
1706             strlen($link['url']) === 7) {
1707             $link['url'] = index_url($_SERVER) . $link['url'];
1708         }
1709
1710         $linkDisp[$keys[$i]] = $link;
1711         $i++;
1712     }
1713
1714     // Compute paging navigation
1715     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1716     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1717     $previous_page_url = '';
1718     if ($i != count($keys)) {
1719         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1720     }
1721     $next_page_url='';
1722     if ($page>1) {
1723         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1724     }
1725
1726     // Fill all template fields.
1727     $data = array(
1728         'previous_page_url' => $previous_page_url,
1729         'next_page_url' => $next_page_url,
1730         'page_current' => $page,
1731         'page_max' => $pagecount,
1732         'result_count' => count($linksToDisplay),
1733         'search_term' => $searchterm,
1734         'search_tags' => $searchtags,
1735         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1736         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1737         'links' => $linkDisp,
1738     );
1739
1740     // If there is only a single link, we change on-the-fly the title of the page.
1741     if (count($linksToDisplay) == 1) {
1742         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1743     }
1744
1745     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1746
1747     foreach ($data as $key => $value) {
1748         $PAGE->assign($key, $value);
1749     }
1750
1751     return;
1752 }
1753
1754 /**
1755  * Compute the thumbnail for a link.
1756  *
1757  * With a link to the original URL.
1758  * Understands various services (youtube.com...)
1759  * Input: $url = URL for which the thumbnail must be found.
1760  *        $href = if provided, this URL will be followed instead of $url
1761  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1762  * Some of them may be missing.
1763  * Return an empty array if no thumbnail available.
1764  *
1765  * @param ConfigManager $conf Configuration Manager instance.
1766  * @param string        $url
1767  * @param string|bool   $href
1768  *
1769  * @return array
1770  */
1771 function computeThumbnail($conf, $url, $href = false)
1772 {
1773     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1774     if ($href==false) $href=$url;
1775
1776     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1777     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1778     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1779     $domain = parse_url($url,PHP_URL_HOST);
1780     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1781     {
1782         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1783         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1784                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1785     }
1786     if ($domain=='youtu.be') // Youtube short links
1787     {
1788         $path = parse_url($url,PHP_URL_PATH);
1789         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1790                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1791     }
1792     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1793     {
1794         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1795         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1796                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1797     }
1798
1799     if ($domain=='imgur.com')
1800     {
1801         $path = parse_url($url,PHP_URL_PATH);
1802         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1803         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1804                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1805         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1806                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1807
1808         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1809                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1810     }
1811     if ($domain=='i.imgur.com')
1812     {
1813         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1814         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1815                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1816     }
1817     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1818     {
1819         if (strpos($url,'dailymotion.com/video/')!==false)
1820         {
1821             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1822             return array('src'=>$thumburl,
1823                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1824         }
1825     }
1826     if (endsWith($domain,'.imageshack.us'))
1827     {
1828         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1829         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1830         {
1831             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1832             return array('src'=>$thumburl,
1833                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1834         }
1835     }
1836
1837     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1838     // So we deport the thumbnail generation in order not to slow down page generation
1839     // (and we also cache the thumbnail)
1840
1841     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1842
1843     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1844         || $domain=='vimeo.com'
1845         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1846         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1847     )
1848     {
1849         if ($domain=='vimeo.com')
1850         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1851             $path = parse_url($url,PHP_URL_PATH);
1852             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1853         }
1854         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1855         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1856             $path = parse_url($url,PHP_URL_PATH);
1857             if (!preg_match('!/\d+.+?!',$path)) return array();
1858         }
1859         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1860         {   // Make sure this TED URL points to a video (/talks/...)
1861             $path = parse_url($url,PHP_URL_PATH);
1862             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1863         }
1864         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1865         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1866                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1867     }
1868
1869     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1870     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1871     // But using the extension will do.
1872     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1873     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1874     {
1875         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1876         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1877                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1878     }
1879     return array(); // No thumbnail.
1880
1881 }
1882
1883
1884 // Returns the HTML code to display a thumbnail for a link
1885 // with a link to the original URL.
1886 // Understands various services (youtube.com...)
1887 // Input: $url = URL for which the thumbnail must be found.
1888 //        $href = if provided, this URL will be followed instead of $url
1889 // Returns '' if no thumbnail available.
1890 function thumbnail($url,$href=false)
1891 {
1892     // FIXME!
1893     global $conf;
1894     $t = computeThumbnail($conf, $url,$href);
1895     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1896
1897     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1898     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1899     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1900     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1901     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1902     $html.='></a>';
1903     return $html;
1904 }
1905
1906 // Returns the HTML code to display a thumbnail for a link
1907 // for the picture wall (using lazy image loading)
1908 // Understands various services (youtube.com...)
1909 // Input: $url = URL for which the thumbnail must be found.
1910 //        $href = if provided, this URL will be followed instead of $url
1911 // Returns '' if no thumbnail available.
1912 function lazyThumbnail($conf, $url,$href=false)
1913 {
1914     // FIXME!
1915     global $conf;
1916     $t = computeThumbnail($conf, $url,$href);
1917     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1918
1919     $html='<a href="'.escape($t['href']).'">';
1920
1921     // Lazy image
1922     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1923
1924     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1925     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1926     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1927     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1928     $html.='>';
1929
1930     // No-JavaScript fallback.
1931     $html.='<noscript><img src="'.escape($t['src']).'"';
1932     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1933     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1934     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1935     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1936     $html.='></noscript></a>';
1937
1938     return $html;
1939 }
1940
1941
1942 /**
1943  * Installation
1944  * This function should NEVER be called if the file data/config.php exists.
1945  *
1946  * @param ConfigManager $conf Configuration Manager instance.
1947  */
1948 function install($conf)
1949 {
1950     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1951     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1952
1953
1954     // This part makes sure sessions works correctly.
1955     // (Because on some hosts, session.save_path may not be set correctly,
1956     // or we may not have write access to it.)
1957     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1958     {   // Step 2: Check if data in session is correct.
1959         echo '<pre>Sessions do not seem to work correctly on your server.<br>';
1960         echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
1961         echo 'It currently points to '.session_save_path().'<br>';
1962         echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
1963         echo '<br><a href="?">Click to try again.</a></pre>';
1964         die;
1965     }
1966     if (!isset($_SESSION['session_tested']))
1967     {   // Step 1 : Try to store data in session and reload page.
1968         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1969         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1970     }
1971     if (isset($_GET['test_session']))
1972     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1973         header('Location: '.index_url($_SERVER));
1974     }
1975
1976
1977     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1978     {
1979         $tz = 'UTC';
1980         if (!empty($_POST['continent']) && !empty($_POST['city'])
1981             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1982         ) {
1983             $tz = $_POST['continent'].'/'.$_POST['city'];
1984         }
1985         $conf->set('general.timezone', $tz);
1986         $login = $_POST['setlogin'];
1987         $conf->set('credentials.login', $login);
1988         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1989         $conf->set('credentials.salt', $salt);
1990         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1991         if (!empty($_POST['title'])) {
1992             $conf->set('general.title', escape($_POST['title']));
1993         } else {
1994             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1995         }
1996         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1997         $conf->set('api.enabled', !empty($_POST['enableApi']));
1998         $conf->set(
1999             'api.secret',
2000             generate_api_secret(
2001                 $conf->get('credentials.login'),
2002                 $conf->get('credentials.salt')
2003             )
2004         );
2005         try {
2006             // Everything is ok, let's create config file.
2007             $conf->write(isLoggedIn());
2008         }
2009         catch(Exception $e) {
2010             error_log(
2011                     'ERROR while writing config file after installation.' . PHP_EOL .
2012                     $e->getMessage()
2013                 );
2014
2015             // TODO: do not handle exceptions/errors in JS.
2016             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2017             exit;
2018         }
2019         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2020         exit;
2021     }
2022
2023     $PAGE = new PageBuilder($conf);
2024     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2025     $PAGE->assign('continents', $continents);
2026     $PAGE->assign('cities', $cities);
2027     $PAGE->renderPage('install');
2028     exit;
2029 }
2030
2031 /**
2032  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2033  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2034  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2035  * This function is called by passing the URL:
2036  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2037  * [URL] is the URL of the link (e.g. a flickr page)
2038  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2039  * The function below will fetch the image from the webservice and store it in the cache.
2040  *
2041  * @param ConfigManager $conf Configuration Manager instance,
2042  */
2043 function genThumbnail($conf)
2044 {
2045     // Make sure the parameters in the URL were generated by us.
2046     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2047     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2048
2049     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2050     // Let's see if we don't already have the image for this URL in the cache.
2051     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2052     if (is_file($cacheDir .'/'. $thumbname))
2053     {   // We have the thumbnail, just serve it:
2054         header('Content-Type: image/jpeg');
2055         echo file_get_contents($cacheDir .'/'. $thumbname);
2056         return;
2057     }
2058     // We may also serve a blank image (if service did not respond)
2059     $blankname=hash('sha1',$_GET['url']).'.gif';
2060     if (is_file($cacheDir .'/'. $blankname))
2061     {
2062         header('Content-Type: image/gif');
2063         echo file_get_contents($cacheDir .'/'. $blankname);
2064         return;
2065     }
2066
2067     // Otherwise, generate the thumbnail.
2068     $url = $_GET['url'];
2069     $domain = parse_url($url,PHP_URL_HOST);
2070
2071     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2072     {
2073         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2074         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2075
2076         // Is this a link to an image, or to a flickr page ?
2077         $imageurl='';
2078         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2079         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2080             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2081             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2082         }
2083         else // This is a flickr page (html)
2084         {
2085             // Get the flickr html page.
2086             list($headers, $content) = get_http_response($url, 20);
2087             if (strpos($headers[0], '200 OK') !== false)
2088             {
2089                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2090                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2091                 if (!empty($matches[1])) $imageurl=$matches[1];
2092
2093                 // In albums (and some other pages), the link rel="image_src" is not provided,
2094                 // but flickr provides:
2095                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2096                 if ($imageurl=='')
2097                 {
2098                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2099                     if (!empty($matches[1])) $imageurl=$matches[1];
2100                 }
2101             }
2102         }
2103
2104         if ($imageurl!='')
2105         {   // Let's download the image.
2106             // Image is 240x120, so 10 seconds to download should be enough.
2107             list($headers, $content) = get_http_response($imageurl, 10);
2108             if (strpos($headers[0], '200 OK') !== false) {
2109                 // Save image to cache.
2110                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2111                 header('Content-Type: image/jpeg');
2112                 echo $content;
2113                 return;
2114             }
2115         }
2116     }
2117
2118     elseif ($domain=='vimeo.com' )
2119     {
2120         // This is more complex: we have to perform a HTTP request, then parse the result.
2121         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2122         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2123         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2124         if (strpos($headers[0], '200 OK') !== false) {
2125             $t = unserialize($content);
2126             $imageurl = $t[0]['thumbnail_medium'];
2127             // Then we download the image and serve it to our client.
2128             list($headers, $content) = get_http_response($imageurl, 10);
2129             if (strpos($headers[0], '200 OK') !== false) {
2130                 // Save image to cache.
2131                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2132                 header('Content-Type: image/jpeg');
2133                 echo $content;
2134                 return;
2135             }
2136         }
2137     }
2138
2139     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2140     {
2141         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2142         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2143         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2144         list($headers, $content) = get_http_response($url, 5);
2145         if (strpos($headers[0], '200 OK') !== false) {
2146             // Extract the link to the thumbnail
2147             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2148             if (!empty($matches[1]))
2149             {   // Let's download the image.
2150                 $imageurl=$matches[1];
2151                 // No control on image size, so wait long enough
2152                 list($headers, $content) = get_http_response($imageurl, 20);
2153                 if (strpos($headers[0], '200 OK') !== false) {
2154                     $filepath = $cacheDir .'/'. $thumbname;
2155                     file_put_contents($filepath, $content); // Save image to cache.
2156                     if (resizeImage($filepath))
2157                     {
2158                         header('Content-Type: image/jpeg');
2159                         echo file_get_contents($filepath);
2160                         return;
2161                     }
2162                 }
2163             }
2164         }
2165     }
2166
2167     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2168     {
2169         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2170         // http://xkcd.com/327/
2171         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2172         list($headers, $content) = get_http_response($url, 5);
2173         if (strpos($headers[0], '200 OK') !== false) {
2174             // Extract the link to the thumbnail
2175             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2176             if (!empty($matches[1]))
2177             {   // Let's download the image.
2178                 $imageurl=$matches[1];
2179                 // No control on image size, so wait long enough
2180                 list($headers, $content) = get_http_response($imageurl, 20);
2181                 if (strpos($headers[0], '200 OK') !== false) {
2182                     $filepath = $cacheDir.'/'.$thumbname;
2183                     // Save image to cache.
2184                     file_put_contents($filepath, $content);
2185                     if (resizeImage($filepath))
2186                     {
2187                         header('Content-Type: image/jpeg');
2188                         echo file_get_contents($filepath);
2189                         return;
2190                     }
2191                 }
2192             }
2193         }
2194     }
2195
2196     else
2197     {
2198         // For all other domains, we try to download the image and make a thumbnail.
2199         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2200         list($headers, $content) = get_http_response($url, 30);
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     // Otherwise, return an empty image (8x8 transparent gif)
2216     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2217     // Also put something in cache so that this URL is not requested twice.
2218     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2219     header('Content-Type: image/gif');
2220     echo $blankgif;
2221 }
2222
2223 // Make a thumbnail of the image (to width: 120 pixels)
2224 // Returns true if success, false otherwise.
2225 function resizeImage($filepath)
2226 {
2227     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2228
2229     // Trick: some stupid people rename GIF as JPEG... or else.
2230     // So we really try to open each image type whatever the extension is.
2231     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2232     $im=false;
2233     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2234     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2235     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2236     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2237     $w = imagesx($im);
2238     $h = imagesy($im);
2239     $ystart = 0; $yheight=$h;
2240     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2241     $nw = 120;   // Desired width
2242     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2243     // Resize image:
2244     $im2 = imagecreatetruecolor($nw,$nh);
2245     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2246     imageinterlace($im2,true); // For progressive JPEG.
2247     $tempname=$filepath.'_TEMP.jpg';
2248     imagejpeg($im2, $tempname, 90);
2249     imagedestroy($im);
2250     imagedestroy($im2);
2251     unlink($filepath);
2252     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2253     return true;
2254 }
2255
2256 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2257 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2258 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2259     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2260 }
2261
2262 $linkDb = new LinkDB(
2263     $conf->get('resource.datastore'),
2264     isLoggedIn(),
2265     $conf->get('privacy.hide_public_links'),
2266     $conf->get('redirector.url'),
2267     $conf->get('redirector.encode_url')
2268 );
2269
2270 try {
2271     $history = new History($conf->get('resource.history'));
2272 } catch(Exception $e) {
2273     die($e->getMessage());
2274 }
2275
2276 $container = new \Slim\Container();
2277 $container['conf'] = $conf;
2278 $container['plugins'] = $pluginManager;
2279 $container['history'] = $history;
2280 $app = new \Slim\App($container);
2281
2282 // REST API routes
2283 $app->group('/api/v1', function() {
2284     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2285     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2286     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2287     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2288     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2289     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2290     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2291 })->add('\Shaarli\Api\ApiMiddleware');
2292
2293 $response = $app->run(true);
2294 // Hack to make Slim and Shaarli router work together:
2295 // If a Slim route isn't found and NOT API call, we call renderPage().
2296 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2297     // We use UTF-8 for proper international characters handling.
2298     header('Content-Type: text/html; charset=utf-8');
2299     renderPage($conf, $pluginManager, $linkDb, $history);
2300 } else {
2301     $app->respond($response);
2302 }