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