index.php

   1 <?php
   2 /**
   3  * Shaarli v0.8.3 - Shaare your links...
   4  *
   5  * The personal, minimalist, super-fast, database free, bookmarking service.
   6  *
   7  * Friendly fork by the Shaarli community:
   8  *  - https://github.com/shaarli/Shaarli
   9  *
  10  * Original project by sebsauvage.net:
  11  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  12  *  - https://github.com/sebsauvage/Shaarli
  13  *
  14  * Licence: http://www.opensource.org/licenses/zlib-license.php
  15  *
  16  * Requires: PHP 5.5.x
  17  */
  18
  19 // Set 'UTC' as the default timezone if it is not defined in php.ini
  20 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  21 if (date_default_timezone_get() == '') {
  22     date_default_timezone_set('UTC');
  23 }
  24
  25 /*
  26  * PHP configuration
  27  */
  28 define('shaarli_version', '0.8.2');
  29
  30 // http://server.com/x/shaarli --> /shaarli/
  31 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  32
  33 // High execution time in case of problematic imports/exports.
  34 ini_set('max_input_time','60');
  35
  36 // Try to set max upload file size and read
  37 ini_set('memory_limit', '128M');
  38 ini_set('post_max_size', '16M');
  39 ini_set('upload_max_filesize', '16M');
  40
  41 // See all error except warnings
  42 error_reporting(E_ALL^E_WARNING);
  43 // See all errors (for debugging only)
  44 //error_reporting(-1);
  45
  46
  47 // 3rd-party libraries
  48 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  49     header('Content-Type: text/plain; charset=utf-8');
  50     echo "Error: missing Composer configuration\n\n"
  51         ."If you installed Shaarli through Git or using the development branch,\n"
  52         ."please refer to the installation documentation to install PHP"
  53         ." dependencies using Composer:\n"
  54         ."- https://github.com/shaarli/Shaarli/wiki/Server-requirements\n"
  55         ."- https://github.com/shaarli/Shaarli/wiki/Download-and-Installation";
  56     exit;
  57 }
  58 require_once 'inc/rain.tpl.class.php';
  59 require_once __DIR__ . '/vendor/autoload.php';
  60
  61 // Shaarli library
  62 require_once 'application/ApplicationUtils.php';
  63 require_once 'application/Cache.php';
  64 require_once 'application/CachedPage.php';
  65 require_once 'application/config/ConfigPlugin.php';
  66 require_once 'application/FeedBuilder.php';
  67 require_once 'application/FileUtils.php';
  68 require_once 'application/HttpUtils.php';
  69 require_once 'application/Languages.php';
  70 require_once 'application/LinkDB.php';
  71 require_once 'application/LinkFilter.php';
  72 require_once 'application/LinkUtils.php';
  73 require_once 'application/NetscapeBookmarkUtils.php';
  74 require_once 'application/PageBuilder.php';
  75 require_once 'application/TimeZone.php';
  76 require_once 'application/Url.php';
  77 require_once 'application/Utils.php';
  78 require_once 'application/PluginManager.php';
  79 require_once 'application/Router.php';
  80 require_once 'application/Updater.php';
  81 use \Shaarli\ThemeUtils;
  82 use \Shaarli\Config\ConfigManager;
  83
  84 // Ensure the PHP version is supported
  85 try {
  86     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  87 } catch(Exception $exc) {
  88     header('Content-Type: text/plain; charset=utf-8');
  89     echo $exc->getMessage();
  90     exit;
  91 }
  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  * PubSubHubbub protocol support (if enabled)  [UNTESTED]
 230  * (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
 231  *
 232  * @param ConfigManager $conf Configuration Manager instance.
 233  */
 234 function pubsubhub($conf)
 235 {
 236     $pshUrl = $conf->get('config.PUBSUBHUB_URL');
 237     if (!empty($pshUrl))
 238     {
 239         include_once './publisher.php';
 240         $p = new Publisher($pshUrl);
 241         $topic_url = array (
 242             index_url($_SERVER).'?do=atom',
 243             index_url($_SERVER).'?do=rss'
 244         );
 245         $p->publish_update($topic_url);
 246     }
 247 }
 248
 249 // ------------------------------------------------------------------------------------------
 250 // Session management
 251
 252 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 253 function allIPs()
 254 {
 255     $ip = $_SERVER['REMOTE_ADDR'];
 256     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 257     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 258     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 259     return $ip;
 260 }
 261
 262 /**
 263  * Load user session.
 264  *
 265  * @param ConfigManager $conf Configuration Manager instance.
 266  */
 267 function fillSessionInfo($conf)
 268 {
 269         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 270         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 271         $_SESSION['username']= $conf->get('credentials.login');
 272         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 273 }
 274
 275 /**
 276  * Check that user/password is correct.
 277  *
 278  * @param string        $login    Username
 279  * @param string        $password User password
 280  * @param ConfigManager $conf     Configuration Manager instance.
 281  *
 282  * @return bool: authentication successful or not.
 283  */
 284 function check_auth($login, $password, $conf)
 285 {
 286     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 287     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 288     {   // Login/password is correct.
 289                 fillSessionInfo($conf);
 290         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 291         return true;
 292     }
 293     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 294     return false;
 295 }
 296
 297 // Returns true if the user is logged in.
 298 function isLoggedIn()
 299 {
 300     global $userIsLoggedIn;
 301     return $userIsLoggedIn;
 302 }
 303
 304 // Force logout.
 305 function logout() {
 306     if (isset($_SESSION)) {
 307         unset($_SESSION['uid']);
 308         unset($_SESSION['ip']);
 309         unset($_SESSION['username']);
 310         unset($_SESSION['privateonly']);
 311     }
 312     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 313 }
 314
 315
 316 // ------------------------------------------------------------------------------------------
 317 // Brute force protection system
 318 // Several consecutive failed logins will ban the IP address for 30 minutes.
 319 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 320     // FIXME! globals
 321     file_put_contents(
 322         $conf->get('resource.ban_file', 'data/ipbans.php'),
 323         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 324     );
 325 }
 326 include $conf->get('resource.ban_file', 'data/ipbans.php');
 327 /**
 328  * Signal a failed login. Will ban the IP if too many failures:
 329  *
 330  * @param ConfigManager $conf Configuration Manager instance.
 331  */
 332 function ban_loginFailed($conf)
 333 {
 334     $ip = $_SERVER['REMOTE_ADDR'];
 335     $trusted = $conf->get('security.trusted_proxies', array());
 336     if (in_array($ip, $trusted)) {
 337         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 338         if (!$ip) {
 339             return;
 340         }
 341     }
 342     $gb = $GLOBALS['IPBANS'];
 343     if (! isset($gb['FAILURES'][$ip])) {
 344         $gb['FAILURES'][$ip]=0;
 345     }
 346     $gb['FAILURES'][$ip]++;
 347     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 348     {
 349         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 350         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 351     }
 352     $GLOBALS['IPBANS'] = $gb;
 353     file_put_contents(
 354         $conf->get('resource.ban_file', 'data/ipbans.php'),
 355         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 356     );
 357 }
 358
 359 /**
 360  * Signals a successful login. Resets failed login counter.
 361  *
 362  * @param ConfigManager $conf Configuration Manager instance.
 363  */
 364 function ban_loginOk($conf)
 365 {
 366     $ip = $_SERVER['REMOTE_ADDR'];
 367     $gb = $GLOBALS['IPBANS'];
 368     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 369     $GLOBALS['IPBANS'] = $gb;
 370     file_put_contents(
 371         $conf->get('resource.ban_file', 'data/ipbans.php'),
 372         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 373     );
 374 }
 375
 376 /**
 377  * Checks if the user CAN login. If 'true', the user can try to login.
 378  *
 379  * @param ConfigManager $conf Configuration Manager instance.
 380  *
 381  * @return bool: true if the user is allowed to login.
 382  */
 383 function ban_canLogin($conf)
 384 {
 385     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 386     if (isset($gb['BANS'][$ip]))
 387     {
 388         // User is banned. Check if the ban has expired:
 389         if ($gb['BANS'][$ip]<=time())
 390         {   // Ban expired, user can try to login again.
 391             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 392             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 393             file_put_contents(
 394                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 395                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 396             );
 397             return true; // Ban has expired, user can login.
 398         }
 399         return false; // User is banned.
 400     }
 401     return true; // User is not banned.
 402 }
 403
 404 // ------------------------------------------------------------------------------------------
 405 // Process login form: Check if login/password is correct.
 406 if (isset($_POST['login']))
 407 {
 408     if (!ban_canLogin($conf)) die('I said: NO. You are banned for the moment. Go away.');
 409     if (isset($_POST['password'])
 410         && tokenOk($_POST['token'])
 411         && (check_auth($_POST['login'], $_POST['password'], $conf))
 412     ) {   // Login/password is OK.
 413         ban_loginOk($conf);
 414         // If user wants to keep the session cookie even after the browser closes:
 415         if (!empty($_POST['longlastingsession']))
 416         {
 417                         setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
 418             $_SESSION['longlastingsession']=31536000;  // (31536000 seconds = 1 year)
 419             $_SESSION['expires_on']=time()+$_SESSION['longlastingsession'];  // Set session expiration on server-side.
 420
 421             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 422             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 423             // Note: Never forget the trailing slash on the cookie path!
 424             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 425         }
 426         else // Standard session expiration (=when browser closes)
 427         {
 428             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 429             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 430             session_regenerate_id(true);
 431         }
 432
 433         // Optional redirect after login:
 434         if (isset($_GET['post'])) {
 435             $uri = '?post='. urlencode($_GET['post']);
 436             foreach (array('description', 'source', 'title') as $param) {
 437                 if (!empty($_GET[$param])) {
 438                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 439                 }
 440             }
 441             header('Location: '. $uri);
 442             exit;
 443         }
 444
 445         if (isset($_GET['edit_link'])) {
 446             header('Location: ?edit_link='. escape($_GET['edit_link']));
 447             exit;
 448         }
 449
 450         if (isset($_POST['returnurl'])) {
 451             // Prevent loops over login screen.
 452             if (strpos($_POST['returnurl'], 'do=login') === false) {
 453                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 454                 exit;
 455             }
 456         }
 457         header('Location: ?'); exit;
 458     }
 459     else
 460     {
 461         ban_loginFailed($conf);
 462         $redir = '&username='. $_POST['login'];
 463         if (isset($_GET['post'])) {
 464             $redir .= '&post=' . urlencode($_GET['post']);
 465             foreach (array('description', 'source', 'title') as $param) {
 466                 if (!empty($_GET[$param])) {
 467                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 468                 }
 469             }
 470         }
 471         echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
 472         exit;
 473     }
 474 }
 475
 476 // ------------------------------------------------------------------------------------------
 477 // Misc utility functions:
 478
 479 // Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes.
 480 function return_bytes($val)
 481 {
 482     $val = trim($val); $last=strtolower($val[strlen($val)-1]);
 483     switch($last)
 484     {
 485         case 'g': $val *= 1024;
 486         case 'm': $val *= 1024;
 487         case 'k': $val *= 1024;
 488     }
 489     return $val;
 490 }
 491
 492 // Try to determine max file size for uploads (POST).
 493 // Returns an integer (in bytes)
 494 function getMaxFileSize()
 495 {
 496     $size1 = return_bytes(ini_get('post_max_size'));
 497     $size2 = return_bytes(ini_get('upload_max_filesize'));
 498     // Return the smaller of two:
 499     $maxsize = min($size1,$size2);
 500     // FIXME: Then convert back to readable notations ? (e.g. 2M instead of 2000000)
 501     return $maxsize;
 502 }
 503
 504 // ------------------------------------------------------------------------------------------
 505 // Token management for XSRF protection
 506 // Token should be used in any form which acts on data (create,update,delete,import...).
 507 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 508
 509 /**
 510  * Returns a token.
 511  *
 512  * @param ConfigManager $conf Configuration Manager instance.
 513  *
 514  * @return string token.
 515  */
 516 function getToken($conf)
 517 {
 518     $rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt'));  // We generate a random string.
 519     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 520     return $rnd;
 521 }
 522
 523 // Tells if a token is OK. Using this function will destroy the token.
 524 // true=token is OK.
 525 function tokenOk($token)
 526 {
 527     if (isset($_SESSION['tokens'][$token]))
 528     {
 529         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 530         return true; // Token is OK.
 531     }
 532     return false; // Wrong token, or already used.
 533 }
 534
 535 /**
 536  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 537  * Gives the last 7 days (which have links).
 538  * This RSS feed cannot be filtered.
 539  *
 540  * @param ConfigManager $conf Configuration Manager instance.
 541  */
 542 function showDailyRSS($conf) {
 543     // Cache system
 544     $query = $_SERVER['QUERY_STRING'];
 545     $cache = new CachedPage(
 546         $conf->get('config.PAGE_CACHE'),
 547         page_url($_SERVER),
 548         startsWith($query,'do=dailyrss') && !isLoggedIn()
 549     );
 550     $cached = $cache->cachedVersion();
 551     if (!empty($cached)) {
 552         echo $cached;
 553         exit;
 554     }
 555
 556     // If cached was not found (or not usable), then read the database and build the response:
 557     // Read links from database (and filter private links if used it not logged in).
 558     $LINKSDB = new LinkDB(
 559         $conf->get('resource.datastore'),
 560         isLoggedIn(),
 561         $conf->get('privacy.hide_public_links'),
 562         $conf->get('redirector.url'),
 563         $conf->get('redirector.encode_url')
 564     );
 565
 566     /* Some Shaarlies may have very few links, so we need to look
 567        back in time until we have enough days ($nb_of_days).
 568     */
 569     $nb_of_days = 7; // We take 7 days.
 570     $today = date('Ymd');
 571     $days = array();
 572
 573     foreach ($LINKSDB as $link) {
 574         $day = $link['created']->format('Ymd'); // Extract day (without time)
 575         if (strcmp($day, $today) < 0) {
 576             if (empty($days[$day])) {
 577                 $days[$day] = array();
 578             }
 579             $days[$day][] = $link;
 580         }
 581
 582         if (count($days) > $nb_of_days) {
 583             break; // Have we collected enough days?
 584         }
 585     }
 586
 587     // Build the RSS feed.
 588     header('Content-Type: application/rss+xml; charset=utf-8');
 589     $pageaddr = escape(index_url($_SERVER));
 590     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 591     echo '<channel>';
 592     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 593     echo '<link>'. $pageaddr .'</link>';
 594     echo '<description>Daily shared links</description>';
 595     echo '<language>en-en</language>';
 596     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 597
 598     // For each day.
 599     foreach ($days as $day => $links) {
 600         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 601         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 602
 603         // We pre-format some fields for proper output.
 604         foreach ($links as &$link) {
 605             $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 606             $link['thumbnail'] = thumbnail($conf, $link['url']);
 607             $link['timestamp'] = $link['created']->getTimestamp();
 608             if (startsWith($link['url'], '?')) {
 609                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 610             }
 611         }
 612
 613         // Then build the HTML for this day:
 614         $tpl = new RainTPL;
 615         $tpl->assign('title', $conf->get('general.title'));
 616         $tpl->assign('daydate', $dayDate->getTimestamp());
 617         $tpl->assign('absurl', $absurl);
 618         $tpl->assign('links', $links);
 619         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 620         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 621         $html = $tpl->draw('dailyrss', true);
 622
 623         echo $html . PHP_EOL;
 624     }
 625     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 626
 627     $cache->cache(ob_get_contents());
 628     ob_end_flush();
 629     exit;
 630 }
 631
 632 /**
 633  * Show the 'Daily' page.
 634  *
 635  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 636  * @param LinkDB        $LINKSDB       LinkDB instance.
 637  * @param ConfigManager $conf          Configuration Manager instance.
 638  * @param PluginManager $pluginManager Plugin Manager instane.
 639  */
 640 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 641 {
 642     $day=date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 643     if (isset($_GET['day'])) $day=$_GET['day'];
 644
 645     $days = $LINKSDB->days();
 646     $i = array_search($day,$days);
 647     if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
 648     $previousday='';
 649     $nextday='';
 650     if ($i!==false)
 651     {
 652         if ($i>=1) $previousday=$days[$i-1];
 653         if ($i<count($days)-1) $nextday=$days[$i+1];
 654     }
 655
 656     try {
 657         $linksToDisplay = $LINKSDB->filterDay($day);
 658     } catch (Exception $exc) {
 659         error_log($exc);
 660         $linksToDisplay = array();
 661     }
 662
 663     // We pre-format some fields for proper output.
 664     foreach($linksToDisplay as $key=>$link)
 665     {
 666
 667         $taglist = explode(' ',$link['tags']);
 668         uasort($taglist, 'strcasecmp');
 669         $linksToDisplay[$key]['taglist']=$taglist;
 670         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 671         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 672         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 673     }
 674
 675     /* We need to spread the articles on 3 columns.
 676        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 677        so I manually spread entries with a simple method: I roughly evaluate the
 678        height of a div according to title and description length.
 679     */
 680     $columns=array(array(),array(),array()); // Entries to display, for each column.
 681     $fill=array(0,0,0);  // Rough estimate of columns fill.
 682     foreach($linksToDisplay as $key=>$link)
 683     {
 684         // Roughly estimate length of entry (by counting characters)
 685         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 686         // Description: 836 characters gives roughly 342 pixel height.
 687         // This is not perfect, but it's usually OK.
 688         $length=strlen($link['title'])+(342*strlen($link['description']))/836;
 689         if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
 690         // Then put in column which is the less filled:
 691         $smallest=min($fill); // find smallest value in array.
 692         $index=array_search($smallest,$fill); // find index of this smallest value.
 693         array_push($columns[$index],$link); // Put entry in this column.
 694         $fill[$index]+=$length;
 695     }
 696
 697     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 698     $data = array(
 699         'linksToDisplay' => $linksToDisplay,
 700         'cols' => $columns,
 701         'day' => $dayDate->getTimestamp(),
 702         'previousday' => $previousday,
 703         'nextday' => $nextday,
 704     );
 705
 706     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 707
 708     foreach ($data as $key => $value) {
 709         $pageBuilder->assign($key, $value);
 710     }
 711
 712     $pageBuilder->renderPage('daily');
 713     exit;
 714 }
 715
 716 /**
 717  * Renders the linklist
 718  *
 719  * @param pageBuilder   $PAGE    pageBuilder instance.
 720  * @param LinkDB        $LINKSDB LinkDB instance.
 721  * @param ConfigManager $conf    Configuration Manager instance.
 722  * @param PluginManager $pluginManager Plugin Manager instance.
 723  */
 724 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 725     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 726     $PAGE->renderPage('linklist');
 727 }
 728
 729 /**
 730  * Render HTML page (according to URL parameters and user rights)
 731  *
 732  * @param ConfigManager $conf          Configuration Manager instance.
 733  * @param PluginManager $pluginManager Plugin Manager instance,
 734  * @param LinkDB        $LINKSDB
 735  */
 736 function renderPage($conf, $pluginManager, $LINKSDB)
 737 {
 738     $updater = new Updater(
 739         read_updates_file($conf->get('resource.updates')),
 740         $LINKSDB,
 741         $conf,
 742         isLoggedIn()
 743     );
 744     try {
 745         $newUpdates = $updater->update();
 746         if (! empty($newUpdates)) {
 747             write_updates_file(
 748                 $conf->get('resource.updates'),
 749                 $updater->getDoneUpdates()
 750             );
 751         }
 752     }
 753     catch(Exception $e) {
 754         die($e->getMessage());
 755     }
 756
 757     $PAGE = new PageBuilder($conf);
 758     $PAGE->assign('linkcount', count($LINKSDB));
 759     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 760     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 761
 762     // Determine which page will be rendered.
 763     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 764     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 765
 766     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 767     // Then assign generated data to RainTPL.
 768     $common_hooks = array(
 769         'includes',
 770         'header',
 771         'footer',
 772     );
 773
 774     foreach($common_hooks as $name) {
 775         $plugin_data = array();
 776         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 777             array(
 778                 'target' => $targetPage,
 779                 'loggedin' => isLoggedIn()
 780             )
 781         );
 782         $PAGE->assign('plugins_' . $name, $plugin_data);
 783     }
 784
 785     // -------- Display login form.
 786     if ($targetPage == Router::$PAGE_LOGIN)
 787     {
 788         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 789         if (isset($_GET['username'])) {
 790             $PAGE->assign('username', escape($_GET['username']));
 791         }
 792         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 793         $PAGE->renderPage('loginform');
 794         exit;
 795     }
 796     // -------- User wants to logout.
 797     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 798     {
 799         invalidateCaches($conf->get('resource.page_cache'));
 800         logout();
 801         header('Location: ?');
 802         exit;
 803     }
 804
 805     // -------- Picture wall
 806     if ($targetPage == Router::$PAGE_PICWALL)
 807     {
 808         // Optionally filter the results:
 809         $links = $LINKSDB->filterSearch($_GET);
 810         $linksToDisplay = array();
 811
 812         // Get only links which have a thumbnail.
 813         foreach($links as $link)
 814         {
 815             $permalink='?'.$link['shorturl'];
 816             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 817             if ($thumb!='') // Only output links which have a thumbnail.
 818             {
 819                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 820                 $linksToDisplay[]=$link; // Add to array.
 821             }
 822         }
 823
 824         $data = array(
 825             'linksToDisplay' => $linksToDisplay,
 826         );
 827         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 828
 829         foreach ($data as $key => $value) {
 830             $PAGE->assign($key, $value);
 831         }
 832
 833         $PAGE->renderPage('picwall');
 834         exit;
 835     }
 836
 837     // -------- Tag cloud
 838     if ($targetPage == Router::$PAGE_TAGCLOUD)
 839     {
 840         $tags= $LINKSDB->allTags();
 841
 842         // We sort tags alphabetically, then choose a font size according to count.
 843         // First, find max value.
 844         $maxcount = 0;
 845         foreach ($tags as $value) {
 846             $maxcount = max($maxcount, $value);
 847         }
 848
 849         // Sort tags alphabetically: case insensitive, support locale if available.
 850         uksort($tags, function($a, $b) {
 851             // Collator is part of PHP intl.
 852             if (class_exists('Collator')) {
 853                 $c = new Collator(setlocale(LC_COLLATE, 0));
 854                 if (!intl_is_failure(intl_get_error_code())) {
 855                     return $c->compare($a, $b);
 856                 }
 857             }
 858             return strcasecmp($a, $b);
 859         });
 860
 861         $tagList = array();
 862         foreach($tags as $key => $value) {
 863             // Tag font size scaling:
 864             //   default 15 and 30 logarithm bases affect scaling,
 865             //   22 and 6 are arbitrary font sizes for max and min sizes.
 866             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 867             $tagList[$key] = array(
 868                 'count' => $value,
 869                 'size' => number_format($size, 2, '.', ''),
 870             );
 871         }
 872
 873         $data = array(
 874             'tags' => $tagList,
 875         );
 876         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 877
 878         foreach ($data as $key => $value) {
 879             $PAGE->assign($key, $value);
 880         }
 881
 882         $PAGE->renderPage('tagcloud');
 883         exit;
 884     }
 885
 886     // Daily page.
 887     if ($targetPage == Router::$PAGE_DAILY) {
 888         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 889     }
 890
 891     // ATOM and RSS feed.
 892     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 893         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 894         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 895
 896         // Cache system
 897         $query = $_SERVER['QUERY_STRING'];
 898         $cache = new CachedPage(
 899             $conf->get('resource.page_cache'),
 900             page_url($_SERVER),
 901             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 902         );
 903         $cached = $cache->cachedVersion();
 904         if (!empty($cached)) {
 905             echo $cached;
 906             exit;
 907         }
 908
 909         // Generate data.
 910         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 911         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 912         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 913         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 914         $data = $feedGenerator->buildData();
 915
 916         // Process plugin hook.
 917         $pluginManager->executeHooks('render_feed', $data, array(
 918             'loggedin' => isLoggedIn(),
 919             'target' => $targetPage,
 920         ));
 921
 922         // Render the template.
 923         $PAGE->assignAll($data);
 924         $PAGE->renderPage('feed.'. $feedType);
 925         $cache->cache(ob_get_contents());
 926         ob_end_flush();
 927         exit;
 928     }
 929
 930     // Display opensearch plugin (XML)
 931     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 932         header('Content-Type: application/xml; charset=utf-8');
 933         $PAGE->assign('serverurl', index_url($_SERVER));
 934         $PAGE->renderPage('opensearch');
 935         exit;
 936     }
 937
 938     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 939     if (isset($_GET['addtag']))
 940     {
 941         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 942         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 943         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 944
 945         // Prevent redirection loop
 946         if (isset($params['addtag'])) {
 947             unset($params['addtag']);
 948         }
 949
 950         // Check if this tag is already in the search query and ignore it if it is.
 951         // Each tag is always separated by a space
 952         if (isset($params['searchtags'])) {
 953             $current_tags = explode(' ', $params['searchtags']);
 954         } else {
 955             $current_tags = array();
 956         }
 957         $addtag = true;
 958         foreach ($current_tags as $value) {
 959             if ($value === $_GET['addtag']) {
 960                 $addtag = false;
 961                 break;
 962             }
 963         }
 964         // Append the tag if necessary
 965         if (empty($params['searchtags'])) {
 966             $params['searchtags'] = trim($_GET['addtag']);
 967         }
 968         else if ($addtag) {
 969             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 970         }
 971
 972         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 973         header('Location: ?'.http_build_query($params));
 974         exit;
 975     }
 976
 977     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 978     if (isset($_GET['removetag'])) {
 979         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 980         if (empty($_SERVER['HTTP_REFERER'])) {
 981             header('Location: ?');
 982             exit;
 983         }
 984
 985         // In case browser does not send HTTP_REFERER
 986         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 987
 988         // Prevent redirection loop
 989         if (isset($params['removetag'])) {
 990             unset($params['removetag']);
 991         }
 992
 993         if (isset($params['searchtags'])) {
 994             $tags = explode(' ', $params['searchtags']);
 995             // Remove value from array $tags.
 996             $tags = array_diff($tags, array($_GET['removetag']));
 997             $params['searchtags'] = implode(' ',$tags);
 998
 999             if (empty($params['searchtags'])) {
1000                 unset($params['searchtags']);
1001             }
1002
1003             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1004         }
1005         header('Location: ?'.http_build_query($params));
1006         exit;
1007     }
1008
1009     // -------- User wants to change the number of links per page (linksperpage=...)
1010     if (isset($_GET['linksperpage'])) {
1011         if (is_numeric($_GET['linksperpage'])) {
1012             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1013         }
1014
1015         if (! empty($_SERVER['HTTP_REFERER'])) {
1016             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1017         } else {
1018             $location = '?';
1019         }
1020         header('Location: '. $location);
1021         exit;
1022     }
1023
1024     // -------- User wants to see only private links (toggle)
1025     if (isset($_GET['privateonly'])) {
1026         if (empty($_SESSION['privateonly'])) {
1027             $_SESSION['privateonly'] = 1; // See only private links
1028         } else {
1029             unset($_SESSION['privateonly']); // See all links
1030         }
1031
1032         if (! empty($_SERVER['HTTP_REFERER'])) {
1033             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1034         } else {
1035             $location = '?';
1036         }
1037         header('Location: '. $location);
1038         exit;
1039     }
1040
1041     // -------- Handle other actions allowed for non-logged in users:
1042     if (!isLoggedIn())
1043     {
1044         // User tries to post new link but is not logged in:
1045         // Show login screen, then redirect to ?post=...
1046         if (isset($_GET['post']))
1047         {
1048             header('Location: ?do=login&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
1049             exit;
1050         }
1051
1052         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1053         if (isset($_GET['edit_link'])) {
1054             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1055             exit;
1056         }
1057
1058         exit; // Never remove this one! All operations below are reserved for logged in user.
1059     }
1060
1061     // -------- All other functions are reserved for the registered user:
1062
1063     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1064     if ($targetPage == Router::$PAGE_TOOLS)
1065     {
1066         $data = array(
1067             'pageabsaddr' => index_url($_SERVER),
1068             'sslenabled' => !empty($_SERVER['HTTPS'])
1069         );
1070         $pluginManager->executeHooks('render_tools', $data);
1071
1072         foreach ($data as $key => $value) {
1073             $PAGE->assign($key, $value);
1074         }
1075
1076         $PAGE->renderPage('tools');
1077         exit;
1078     }
1079
1080     // -------- User wants to change his/her password.
1081     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1082     {
1083         if ($conf->get('security.open_shaarli')) {
1084             die('You are not supposed to change a password on an Open Shaarli.');
1085         }
1086
1087         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1088         {
1089             if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1090
1091             // Make sure old password is correct.
1092             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1093             if ($oldhash!= $conf->get('credentials.hash')) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1094             // Save new password
1095             // Salt renders rainbow-tables attacks useless.
1096             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1097             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1098             try {
1099                 $conf->write(isLoggedIn());
1100             }
1101             catch(Exception $e) {
1102                 error_log(
1103                     'ERROR while writing config file after changing password.' . PHP_EOL .
1104                     $e->getMessage()
1105                 );
1106
1107                 // TODO: do not handle exceptions/errors in JS.
1108                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1109                 exit;
1110             }
1111             echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1112             exit;
1113         }
1114         else // show the change password form.
1115         {
1116             $PAGE->renderPage('changepassword');
1117             exit;
1118         }
1119     }
1120
1121     // -------- User wants to change configuration
1122     if ($targetPage == Router::$PAGE_CONFIGURE)
1123     {
1124         if (!empty($_POST['title']) )
1125         {
1126             if (!tokenOk($_POST['token'])) {
1127                 die('Wrong token.'); // Go away!
1128             }
1129             $tz = 'UTC';
1130             if (!empty($_POST['continent']) && !empty($_POST['city'])
1131                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1132             ) {
1133                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1134             }
1135             $conf->set('general.timezone', $tz);
1136             $conf->set('general.title', escape($_POST['title']));
1137             $conf->set('general.header_link', escape($_POST['titleLink']));
1138             $conf->set('resource.theme', escape($_POST['theme']));
1139             $conf->set('redirector.url', escape($_POST['redirector']));
1140             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1141             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1142             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1143             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1144             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1145             $conf->set('api.enabled', !empty($_POST['apiEnabled']));
1146             $conf->set('api.secret', escape($_POST['apiSecret']));
1147             try {
1148                 $conf->write(isLoggedIn());
1149                 invalidateCaches($conf->get('resource.page_cache'));
1150             }
1151             catch(Exception $e) {
1152                 error_log(
1153                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1154                     $e->getMessage()
1155                 );
1156
1157                 // TODO: do not handle exceptions/errors in JS.
1158                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1159                 exit;
1160             }
1161             echo '<script>alert("Configuration was saved.");document.location=\'?do=configure\';</script>';
1162             exit;
1163         }
1164         else // Show the configuration form.
1165         {
1166             $PAGE->assign('title', $conf->get('general.title'));
1167             $PAGE->assign('theme', $conf->get('resource.theme'));
1168             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1169             $PAGE->assign('redirector', $conf->get('redirector.url'));
1170             list($timezone_form, $timezone_js) = generateTimeZoneForm($conf->get('general.timezone'));
1171             $PAGE->assign('timezone_form', $timezone_form);
1172             $PAGE->assign('timezone_js',$timezone_js);
1173             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1174             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1175             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1176             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1177             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1178             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1179             $PAGE->assign('api_secret', $conf->get('api.secret'));
1180             $PAGE->renderPage('configure');
1181             exit;
1182         }
1183     }
1184
1185     // -------- User wants to rename a tag or delete it
1186     if ($targetPage == Router::$PAGE_CHANGETAG)
1187     {
1188         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1189             $PAGE->assign('tags', $LINKSDB->allTags());
1190             $PAGE->renderPage('changetag');
1191             exit;
1192         }
1193
1194         if (!tokenOk($_POST['token'])) {
1195             die('Wrong token.');
1196         }
1197
1198         // Delete a tag:
1199         if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
1200             $needle = trim($_POST['fromtag']);
1201             // True for case-sensitive tag search.
1202             $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1203             foreach($linksToAlter as $key=>$value)
1204             {
1205                 $tags = explode(' ',trim($value['tags']));
1206                 unset($tags[array_search($needle,$tags)]); // Remove tag.
1207                 $value['tags']=trim(implode(' ',$tags));
1208                 $LINKSDB[$key]=$value;
1209             }
1210             $LINKSDB->save($conf->get('resource.page_cache'));
1211             echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?do=changetag\';</script>';
1212             exit;
1213         }
1214
1215         // Rename a tag:
1216         if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
1217             $needle = trim($_POST['fromtag']);
1218             // True for case-sensitive tag search.
1219             $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1220             foreach($linksToAlter as $key=>$value) {
1221                 $tags = preg_split('/\s+/', trim($value['tags']));
1222                 // Replace tags value.
1223                 $tags[array_search($needle, $tags)] = trim($_POST['totag']);
1224                 $value['tags'] = implode(' ', array_unique($tags));
1225                 $LINKSDB[$key] = $value;
1226             }
1227             $LINKSDB->save($conf->get('resource.page_cache')); // Save to disk.
1228             echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode(escape($_POST['totag'])).'\';</script>';
1229             exit;
1230         }
1231     }
1232
1233     // -------- User wants to add a link without using the bookmarklet: Show form.
1234     if ($targetPage == Router::$PAGE_ADDLINK)
1235     {
1236         $PAGE->renderPage('addlink');
1237         exit;
1238     }
1239
1240     // -------- User clicked the "Save" button when editing a link: Save link to database.
1241     if (isset($_POST['save_edit']))
1242     {
1243         // Go away!
1244         if (! tokenOk($_POST['token'])) {
1245             die('Wrong token.');
1246         }
1247
1248         // lf_id should only be present if the link exists.
1249         $id = !empty($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1250         // Linkdate is kept here to:
1251         //   - use the same permalink for notes as they're displayed when creating them
1252         //   - let users hack creation date of their posts
1253         //     See: https://github.com/shaarli/Shaarli/wiki/Datastore-hacks#changing-the-timestamp-for-a-link
1254         $linkdate = escape($_POST['lf_linkdate']);
1255         if (isset($LINKSDB[$id])) {
1256             // Edit
1257             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1258             $updated = new DateTime();
1259             $shortUrl = $LINKSDB[$id]['shorturl'];
1260         } else {
1261             // New link
1262             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1263             $updated = null;
1264             $shortUrl = link_small_hash($created, $id);
1265         }
1266
1267         // Remove multiple spaces.
1268         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1269         // Remove first '-' char in tags.
1270         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1271         // Remove duplicates.
1272         $tags = implode(' ', array_unique(explode(' ', $tags)));
1273
1274         $url = trim($_POST['lf_url']);
1275         if (! startsWith($url, 'http:') && ! startsWith($url, 'https:')
1276             && ! startsWith($url, 'ftp:') && ! startsWith($url, 'magnet:')
1277             && ! startsWith($url, '?') && ! startsWith($url, 'javascript:')
1278         ) {
1279             $url = 'http://' . $url;
1280         }
1281
1282         $link = array(
1283             'id' => $id,
1284             'title' => trim($_POST['lf_title']),
1285             'url' => $url,
1286             'description' => $_POST['lf_description'],
1287             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1288             'created' => $created,
1289             'updated' => $updated,
1290             'tags' => str_replace(',', ' ', $tags),
1291             'shorturl' => $shortUrl,
1292         );
1293
1294         // If title is empty, use the URL as title.
1295         if ($link['title'] == '') {
1296             $link['title'] = $link['url'];
1297         }
1298
1299         $pluginManager->executeHooks('save_link', $link);
1300
1301         $LINKSDB[$id] = $link;
1302         $LINKSDB->save($conf->get('resource.page_cache'));
1303
1304         // If we are called from the bookmarklet, we must close the popup:
1305         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1306             echo '<script>self.close();</script>';
1307             exit;
1308         }
1309
1310         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1311         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1312         // Scroll to the link which has been edited.
1313         $location .= '#' . $link['shorturl'];
1314         // After saving the link, redirect to the page the user was on.
1315         header('Location: '. $location);
1316         exit;
1317     }
1318
1319     // -------- User clicked the "Cancel" button when editing a link.
1320     if (isset($_POST['cancel_edit']))
1321     {
1322         // If we are called from the bookmarklet, we must close the popup:
1323         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1324         $link = $LINKSDB[(int) escape($_POST['lf_id'])];
1325         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1326         // Scroll to the link which has been edited.
1327         $returnurl .= '#'. $link['shorturl'];
1328         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1329         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1330         exit;
1331     }
1332
1333     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1334     if ($targetPage == Router::$PAGE_DELETELINK)
1335     {
1336         // We do not need to ask for confirmation:
1337         // - confirmation is handled by JavaScript
1338         // - we are protected from XSRF by the token.
1339
1340         if (! tokenOk($_GET['token'])) {
1341             die('Wrong token.');
1342         }
1343
1344         $id = intval(escape($_GET['lf_linkdate']));
1345         $link = $LINKSDB[$id];
1346         $pluginManager->executeHooks('delete_link', $link);
1347         unset($LINKSDB[$id]);
1348         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1349
1350         // If we are called from the bookmarklet, we must close the popup:
1351         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1352
1353         $location = '?';
1354         if (isset($_SERVER['HTTP_REFERER'])) {
1355             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1356             $location = generateLocation(
1357                     $_SERVER['HTTP_REFERER'],
1358                     $_SERVER['HTTP_HOST'],
1359                     ['delete_link', 'edit_link', $link['shorturl']]
1360             );
1361         }
1362
1363         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1364         exit;
1365     }
1366
1367     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1368     if (isset($_GET['edit_link']))
1369     {
1370         $id = (int) escape($_GET['edit_link']);
1371         $link = $LINKSDB[$id];  // Read database
1372         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1373         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1374         $data = array(
1375             'link' => $link,
1376             'link_is_new' => false,
1377             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1378             'tags' => $LINKSDB->allTags(),
1379         );
1380         $pluginManager->executeHooks('render_editlink', $data);
1381
1382         foreach ($data as $key => $value) {
1383             $PAGE->assign($key, $value);
1384         }
1385
1386         $PAGE->renderPage('editlink');
1387         exit;
1388     }
1389
1390     // -------- User want to post a new link: Display link edit form.
1391     if (isset($_GET['post'])) {
1392         $url = cleanup_url($_GET['post']);
1393
1394         $link_is_new = false;
1395         // Check if URL is not already in database (in this case, we will edit the existing link)
1396         $link = $LINKSDB->getLinkFromUrl($url);
1397         if (! $link)
1398         {
1399             $link_is_new = true;
1400             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1401             // Get title if it was provided in URL (by the bookmarklet).
1402             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1403             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1404             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1405             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1406             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1407             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1408             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1409                 // Short timeout to keep the application responsive
1410                 list($headers, $content) = get_http_response($url, 4);
1411                 if (strpos($headers[0], '200 OK') !== false) {
1412                     // Retrieve charset.
1413                     $charset = get_charset($headers, $content);
1414                     // Extract title.
1415                     $title = html_extract_title($content);
1416                     // Re-encode title in utf-8 if necessary.
1417                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1418                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1419                     }
1420                 }
1421             }
1422
1423             if ($url == '') {
1424                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1425                 $title = 'Note: ';
1426             }
1427             $url = escape($url);
1428             $title = escape($title);
1429
1430             $link = array(
1431                 'linkdate' => $linkdate,
1432                 'title' => $title,
1433                 'url' => $url,
1434                 'description' => $description,
1435                 'tags' => $tags,
1436                 'private' => $private
1437             );
1438         } else {
1439             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1440         }
1441
1442         $data = array(
1443             'link' => $link,
1444             'link_is_new' => $link_is_new,
1445             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1446             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1447             'tags' => $LINKSDB->allTags(),
1448             'default_private_links' => $conf->get('privacy.default_private_links', false),
1449         );
1450         $pluginManager->executeHooks('render_editlink', $data);
1451
1452         foreach ($data as $key => $value) {
1453             $PAGE->assign($key, $value);
1454         }
1455
1456         $PAGE->renderPage('editlink');
1457         exit;
1458     }
1459
1460     if ($targetPage == Router::$PAGE_EXPORT) {
1461         // Export links as a Netscape Bookmarks file
1462
1463         if (empty($_GET['selection'])) {
1464             $PAGE->renderPage('export');
1465             exit;
1466         }
1467
1468         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1469         $selection = $_GET['selection'];
1470         if (isset($_GET['prepend_note_url'])) {
1471             $prependNoteUrl = $_GET['prepend_note_url'];
1472         } else {
1473             $prependNoteUrl = false;
1474         }
1475
1476         try {
1477             $PAGE->assign(
1478                 'links',
1479                 NetscapeBookmarkUtils::filterAndFormat(
1480                     $LINKSDB,
1481                     $selection,
1482                     $prependNoteUrl,
1483                     index_url($_SERVER)
1484                 )
1485             );
1486         } catch (Exception $exc) {
1487             header('Content-Type: text/plain; charset=utf-8');
1488             echo $exc->getMessage();
1489             exit;
1490         }
1491         $now = new DateTime();
1492         header('Content-Type: text/html; charset=utf-8');
1493         header(
1494             'Content-disposition: attachment; filename=bookmarks_'
1495            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1496         );
1497         $PAGE->assign('date', $now->format(DateTime::RFC822));
1498         $PAGE->assign('eol', PHP_EOL);
1499         $PAGE->assign('selection', $selection);
1500         $PAGE->renderPage('export.bookmarks');
1501         exit;
1502     }
1503
1504     if ($targetPage == Router::$PAGE_IMPORT) {
1505         // Upload a Netscape bookmark dump to import its contents
1506
1507         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1508             // Show import dialog
1509             $PAGE->assign('maxfilesize', getMaxFileSize());
1510             $PAGE->renderPage('import');
1511             exit;
1512         }
1513
1514         // Import bookmarks from an uploaded file
1515         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1516             // The file is too big or some form field may be missing.
1517             echo '<script>alert("The file you are trying to upload is probably'
1518                 .' bigger than what this webserver can accept ('
1519                 .getMaxFileSize().' bytes).'
1520                 .' Please upload in smaller chunks.");document.location=\'?do='
1521                 .Router::$PAGE_IMPORT .'\';</script>';
1522             exit;
1523         }
1524         if (! tokenOk($_POST['token'])) {
1525             die('Wrong token.');
1526         }
1527         $status = NetscapeBookmarkUtils::import(
1528             $_POST,
1529             $_FILES,
1530             $LINKSDB,
1531             $conf->get('resource.page_cache')
1532         );
1533         echo '<script>alert("'.$status.'");document.location=\'?do='
1534              .Router::$PAGE_IMPORT .'\';</script>';
1535         exit;
1536     }
1537
1538     // Plugin administration page
1539     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1540         $pluginMeta = $pluginManager->getPluginsMeta();
1541
1542         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1543         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1544         // Load parameters.
1545         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1546         uasort(
1547             $enabledPlugins,
1548             function($a, $b) { return $a['order'] - $b['order']; }
1549         );
1550         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1551
1552         $PAGE->assign('enabledPlugins', $enabledPlugins);
1553         $PAGE->assign('disabledPlugins', $disabledPlugins);
1554         $PAGE->renderPage('pluginsadmin');
1555         exit;
1556     }
1557
1558     // Plugin administration form action
1559     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1560         try {
1561             if (isset($_POST['parameters_form'])) {
1562                 unset($_POST['parameters_form']);
1563                 foreach ($_POST as $param => $value) {
1564                     $conf->set('plugins.'. $param, escape($value));
1565                 }
1566             }
1567             else {
1568                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1569             }
1570             $conf->write(isLoggedIn());
1571         }
1572         catch (Exception $e) {
1573             error_log(
1574                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1575                 $e->getMessage()
1576             );
1577
1578             // TODO: do not handle exceptions/errors in JS.
1579             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1580             exit;
1581         }
1582         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1583         exit;
1584     }
1585
1586     // -------- Otherwise, simply display search form and links:
1587     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1588     exit;
1589 }
1590
1591 /**
1592  * Template for the list of links (<div id="linklist">)
1593  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1594  *
1595  * @param pageBuilder   $PAGE          pageBuilder instance.
1596  * @param LinkDB        $LINKSDB       LinkDB instance.
1597  * @param ConfigManager $conf          Configuration Manager instance.
1598  * @param PluginManager $pluginManager Plugin Manager instance.
1599  */
1600 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1601 {
1602     // Used in templates
1603     $searchtags = !empty($_GET['searchtags']) ? escape(normalize_spaces($_GET['searchtags'])) : '';
1604     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1605
1606     // Smallhash filter
1607     if (! empty($_SERVER['QUERY_STRING'])
1608         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1609         try {
1610             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1611         } catch (LinkNotFoundException $e) {
1612             $PAGE->render404($e->getMessage());
1613             exit;
1614         }
1615     } else {
1616         // Filter links according search parameters.
1617         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1618         $linksToDisplay = $LINKSDB->filterSearch($_GET, false, $visibility);
1619     }
1620
1621     // ---- Handle paging.
1622     $keys = array();
1623     foreach ($linksToDisplay as $key => $value) {
1624         $keys[] = $key;
1625     }
1626
1627
1628
1629     // Select articles according to paging.
1630     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1631     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1632     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1633     $page = $page < 1 ? 1 : $page;
1634     $page = $page > $pagecount ? $pagecount : $page;
1635     // Start index.
1636     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1637     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1638     $linkDisp = array();
1639     while ($i<$end && $i<count($keys))
1640     {
1641         $link = $linksToDisplay[$keys[$i]];
1642         $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1643         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1644         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1645         $link['timestamp'] = $link['created']->getTimestamp();
1646         if (! empty($link['updated'])) {
1647             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1648         } else {
1649             $link['updated_timestamp'] = '';
1650         }
1651         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1652         uasort($taglist, 'strcasecmp');
1653         $link['taglist'] = $taglist;
1654         // Check for both signs of a note: starting with ? and 7 chars long.
1655         if ($link['url'][0] === '?' &&
1656             strlen($link['url']) === 7) {
1657             $link['url'] = index_url($_SERVER) . $link['url'];
1658         }
1659
1660         $linkDisp[$keys[$i]] = $link;
1661         $i++;
1662     }
1663
1664     // Compute paging navigation
1665     $searchtagsUrl = empty($searchtags) ? '' : '&searchtags=' . urlencode($searchtags);
1666     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1667     $previous_page_url = '';
1668     if ($i != count($keys)) {
1669         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1670     }
1671     $next_page_url='';
1672     if ($page>1) {
1673         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1674     }
1675
1676     // Fill all template fields.
1677     $data = array(
1678         'previous_page_url' => $previous_page_url,
1679         'next_page_url' => $next_page_url,
1680         'page_current' => $page,
1681         'page_max' => $pagecount,
1682         'result_count' => count($linksToDisplay),
1683         'search_term' => $searchterm,
1684         'search_tags' => $searchtags,
1685         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1686         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1687         'links' => $linkDisp,
1688         'tags' => $LINKSDB->allTags(),
1689     );
1690
1691     // If there is only a single link, we change on-the-fly the title of the page.
1692     if (count($linksToDisplay) == 1) {
1693         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1694     }
1695
1696     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1697
1698     foreach ($data as $key => $value) {
1699         $PAGE->assign($key, $value);
1700     }
1701
1702     return;
1703 }
1704
1705 /**
1706  * Compute the thumbnail for a link.
1707  *
1708  * With a link to the original URL.
1709  * Understands various services (youtube.com...)
1710  * Input: $url = URL for which the thumbnail must be found.
1711  *        $href = if provided, this URL will be followed instead of $url
1712  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1713  * Some of them may be missing.
1714  * Return an empty array if no thumbnail available.
1715  *
1716  * @param ConfigManager $conf Configuration Manager instance.
1717  * @param string        $url
1718  * @param string|bool   $href
1719  *
1720  * @return array
1721  */
1722 function computeThumbnail($conf, $url, $href = false)
1723 {
1724     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1725     if ($href==false) $href=$url;
1726
1727     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1728     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1729     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1730     $domain = parse_url($url,PHP_URL_HOST);
1731     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1732     {
1733         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1734         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1735                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1736     }
1737     if ($domain=='youtu.be') // Youtube short links
1738     {
1739         $path = parse_url($url,PHP_URL_PATH);
1740         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1741                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1742     }
1743     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1744     {
1745         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1746         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1747                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1748     }
1749
1750     if ($domain=='imgur.com')
1751     {
1752         $path = parse_url($url,PHP_URL_PATH);
1753         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1754         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1755                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1756         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1757                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1758
1759         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1760                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1761     }
1762     if ($domain=='i.imgur.com')
1763     {
1764         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1765         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1766                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1767     }
1768     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1769     {
1770         if (strpos($url,'dailymotion.com/video/')!==false)
1771         {
1772             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1773             return array('src'=>$thumburl,
1774                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1775         }
1776     }
1777     if (endsWith($domain,'.imageshack.us'))
1778     {
1779         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1780         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1781         {
1782             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1783             return array('src'=>$thumburl,
1784                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1785         }
1786     }
1787
1788     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1789     // So we deport the thumbnail generation in order not to slow down page generation
1790     // (and we also cache the thumbnail)
1791
1792     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1793
1794     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1795         || $domain=='vimeo.com'
1796         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1797         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1798     )
1799     {
1800         if ($domain=='vimeo.com')
1801         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1802             $path = parse_url($url,PHP_URL_PATH);
1803             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1804         }
1805         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1806         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1807             $path = parse_url($url,PHP_URL_PATH);
1808             if (!preg_match('!/\d+.+?!',$path)) return array();
1809         }
1810         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1811         {   // Make sure this TED URL points to a video (/talks/...)
1812             $path = parse_url($url,PHP_URL_PATH);
1813             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1814         }
1815         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1816         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1817                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1818     }
1819
1820     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1821     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1822     // But using the extension will do.
1823     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1824     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1825     {
1826         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1827         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1828                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1829     }
1830     return array(); // No thumbnail.
1831
1832 }
1833
1834
1835 // Returns the HTML code to display a thumbnail for a link
1836 // with a link to the original URL.
1837 // Understands various services (youtube.com...)
1838 // Input: $url = URL for which the thumbnail must be found.
1839 //        $href = if provided, this URL will be followed instead of $url
1840 // Returns '' if no thumbnail available.
1841 function thumbnail($url,$href=false)
1842 {
1843     // FIXME!
1844     global $conf;
1845     $t = computeThumbnail($conf, $url,$href);
1846     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1847
1848     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1849     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1850     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1851     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1852     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1853     $html.='></a>';
1854     return $html;
1855 }
1856
1857 // Returns the HTML code to display a thumbnail for a link
1858 // for the picture wall (using lazy image loading)
1859 // Understands various services (youtube.com...)
1860 // Input: $url = URL for which the thumbnail must be found.
1861 //        $href = if provided, this URL will be followed instead of $url
1862 // Returns '' if no thumbnail available.
1863 function lazyThumbnail($conf, $url,$href=false)
1864 {
1865     // FIXME!
1866     global $conf;
1867     $t = computeThumbnail($conf, $url,$href);
1868     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1869
1870     $html='<a href="'.escape($t['href']).'">';
1871
1872     // Lazy image
1873     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1874
1875     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1876     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1877     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1878     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1879     $html.='>';
1880
1881     // No-JavaScript fallback.
1882     $html.='<noscript><img src="'.escape($t['src']).'"';
1883     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1884     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1885     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1886     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1887     $html.='></noscript></a>';
1888
1889     return $html;
1890 }
1891
1892
1893 /**
1894  * Installation
1895  * This function should NEVER be called if the file data/config.php exists.
1896  *
1897  * @param ConfigManager $conf Configuration Manager instance.
1898  */
1899 function install($conf)
1900 {
1901     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1902     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1903
1904
1905     // This part makes sure sessions works correctly.
1906     // (Because on some hosts, session.save_path may not be set correctly,
1907     // or we may not have write access to it.)
1908     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1909     {   // Step 2: Check if data in session is correct.
1910         echo '<pre>Sessions do not seem to work correctly on your server.<br>';
1911         echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
1912         echo 'It currently points to '.session_save_path().'<br>';
1913         echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
1914         echo '<br><a href="?">Click to try again.</a></pre>';
1915         die;
1916     }
1917     if (!isset($_SESSION['session_tested']))
1918     {   // Step 1 : Try to store data in session and reload page.
1919         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1920         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1921     }
1922     if (isset($_GET['test_session']))
1923     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1924         header('Location: '.index_url($_SERVER));
1925     }
1926
1927
1928     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1929     {
1930         $tz = 'UTC';
1931         if (!empty($_POST['continent']) && !empty($_POST['city'])
1932             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1933         ) {
1934             $tz = $_POST['continent'].'/'.$_POST['city'];
1935         }
1936         $conf->set('general.timezone', $tz);
1937         $login = $_POST['setlogin'];
1938         $conf->set('credentials.login', $login);
1939         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1940         $conf->set('credentials.salt', $salt);
1941         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1942         if (!empty($_POST['title'])) {
1943             $conf->set('general.title', escape($_POST['title']));
1944         } else {
1945             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1946         }
1947         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1948         $conf->set('api.enabled', !empty($_POST['enableApi']));
1949         $conf->set(
1950             'api.secret',
1951             generate_api_secret(
1952                 $conf->get('credentials.login'),
1953                 $conf->get('credentials.salt')
1954             )
1955         );
1956         try {
1957             // Everything is ok, let's create config file.
1958             $conf->write(isLoggedIn());
1959         }
1960         catch(Exception $e) {
1961             error_log(
1962                     'ERROR while writing config file after installation.' . PHP_EOL .
1963                     $e->getMessage()
1964                 );
1965
1966             // TODO: do not handle exceptions/errors in JS.
1967             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1968             exit;
1969         }
1970         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1971         exit;
1972     }
1973
1974     // Display config form:
1975     list($timezone_form, $timezone_js) = generateTimeZoneForm();
1976     $timezone_html = '';
1977     if ($timezone_form != '') {
1978         $timezone_html = '<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
1979     }
1980
1981     $PAGE = new PageBuilder($conf);
1982     $PAGE->assign('timezone_html',$timezone_html);
1983     $PAGE->assign('timezone_js',$timezone_js);
1984     $PAGE->renderPage('install');
1985     exit;
1986 }
1987
1988 /**
1989  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
1990  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
1991  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
1992  * This function is called by passing the URL:
1993  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
1994  * [URL] is the URL of the link (e.g. a flickr page)
1995  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
1996  * The function below will fetch the image from the webservice and store it in the cache.
1997  *
1998  * @param ConfigManager $conf Configuration Manager instance,
1999  */
2000 function genThumbnail($conf)
2001 {
2002     // Make sure the parameters in the URL were generated by us.
2003     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2004     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2005
2006     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2007     // Let's see if we don't already have the image for this URL in the cache.
2008     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2009     if (is_file($cacheDir .'/'. $thumbname))
2010     {   // We have the thumbnail, just serve it:
2011         header('Content-Type: image/jpeg');
2012         echo file_get_contents($cacheDir .'/'. $thumbname);
2013         return;
2014     }
2015     // We may also serve a blank image (if service did not respond)
2016     $blankname=hash('sha1',$_GET['url']).'.gif';
2017     if (is_file($cacheDir .'/'. $blankname))
2018     {
2019         header('Content-Type: image/gif');
2020         echo file_get_contents($cacheDir .'/'. $blankname);
2021         return;
2022     }
2023
2024     // Otherwise, generate the thumbnail.
2025     $url = $_GET['url'];
2026     $domain = parse_url($url,PHP_URL_HOST);
2027
2028     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2029     {
2030         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2031         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2032
2033         // Is this a link to an image, or to a flickr page ?
2034         $imageurl='';
2035         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2036         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2037             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2038             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2039         }
2040         else // This is a flickr page (html)
2041         {
2042             // Get the flickr html page.
2043             list($headers, $content) = get_http_response($url, 20);
2044             if (strpos($headers[0], '200 OK') !== false)
2045             {
2046                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2047                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2048                 if (!empty($matches[1])) $imageurl=$matches[1];
2049
2050                 // In albums (and some other pages), the link rel="image_src" is not provided,
2051                 // but flickr provides:
2052                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2053                 if ($imageurl=='')
2054                 {
2055                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2056                     if (!empty($matches[1])) $imageurl=$matches[1];
2057                 }
2058             }
2059         }
2060
2061         if ($imageurl!='')
2062         {   // Let's download the image.
2063             // Image is 240x120, so 10 seconds to download should be enough.
2064             list($headers, $content) = get_http_response($imageurl, 10);
2065             if (strpos($headers[0], '200 OK') !== false) {
2066                 // Save image to cache.
2067                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2068                 header('Content-Type: image/jpeg');
2069                 echo $content;
2070                 return;
2071             }
2072         }
2073     }
2074
2075     elseif ($domain=='vimeo.com' )
2076     {
2077         // This is more complex: we have to perform a HTTP request, then parse the result.
2078         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2079         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2080         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2081         if (strpos($headers[0], '200 OK') !== false) {
2082             $t = unserialize($content);
2083             $imageurl = $t[0]['thumbnail_medium'];
2084             // Then we download the image and serve it to our client.
2085             list($headers, $content) = get_http_response($imageurl, 10);
2086             if (strpos($headers[0], '200 OK') !== false) {
2087                 // Save image to cache.
2088                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2089                 header('Content-Type: image/jpeg');
2090                 echo $content;
2091                 return;
2092             }
2093         }
2094     }
2095
2096     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2097     {
2098         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2099         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2100         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2101         list($headers, $content) = get_http_response($url, 5);
2102         if (strpos($headers[0], '200 OK') !== false) {
2103             // Extract the link to the thumbnail
2104             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2105             if (!empty($matches[1]))
2106             {   // Let's download the image.
2107                 $imageurl=$matches[1];
2108                 // No control on image size, so wait long enough
2109                 list($headers, $content) = get_http_response($imageurl, 20);
2110                 if (strpos($headers[0], '200 OK') !== false) {
2111                     $filepath = $cacheDir .'/'. $thumbname;
2112                     file_put_contents($filepath, $content); // Save image to cache.
2113                     if (resizeImage($filepath))
2114                     {
2115                         header('Content-Type: image/jpeg');
2116                         echo file_get_contents($filepath);
2117                         return;
2118                     }
2119                 }
2120             }
2121         }
2122     }
2123
2124     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2125     {
2126         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2127         // http://xkcd.com/327/
2128         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2129         list($headers, $content) = get_http_response($url, 5);
2130         if (strpos($headers[0], '200 OK') !== false) {
2131             // Extract the link to the thumbnail
2132             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2133             if (!empty($matches[1]))
2134             {   // Let's download the image.
2135                 $imageurl=$matches[1];
2136                 // No control on image size, so wait long enough
2137                 list($headers, $content) = get_http_response($imageurl, 20);
2138                 if (strpos($headers[0], '200 OK') !== false) {
2139                     $filepath = $cacheDir.'/'.$thumbname;
2140                     // Save image to cache.
2141                     file_put_contents($filepath, $content);
2142                     if (resizeImage($filepath))
2143                     {
2144                         header('Content-Type: image/jpeg');
2145                         echo file_get_contents($filepath);
2146                         return;
2147                     }
2148                 }
2149             }
2150         }
2151     }
2152
2153     else
2154     {
2155         // For all other domains, we try to download the image and make a thumbnail.
2156         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2157         list($headers, $content) = get_http_response($url, 30);
2158         if (strpos($headers[0], '200 OK') !== false) {
2159             $filepath = $cacheDir .'/'.$thumbname;
2160             // Save image to cache.
2161             file_put_contents($filepath, $content);
2162             if (resizeImage($filepath))
2163             {
2164                 header('Content-Type: image/jpeg');
2165                 echo file_get_contents($filepath);
2166                 return;
2167             }
2168         }
2169     }
2170
2171
2172     // Otherwise, return an empty image (8x8 transparent gif)
2173     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2174     // Also put something in cache so that this URL is not requested twice.
2175     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2176     header('Content-Type: image/gif');
2177     echo $blankgif;
2178 }
2179
2180 // Make a thumbnail of the image (to width: 120 pixels)
2181 // Returns true if success, false otherwise.
2182 function resizeImage($filepath)
2183 {
2184     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2185
2186     // Trick: some stupid people rename GIF as JPEG... or else.
2187     // So we really try to open each image type whatever the extension is.
2188     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2189     $im=false;
2190     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2191     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2192     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2193     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2194     $w = imagesx($im);
2195     $h = imagesy($im);
2196     $ystart = 0; $yheight=$h;
2197     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2198     $nw = 120;   // Desired width
2199     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2200     // Resize image:
2201     $im2 = imagecreatetruecolor($nw,$nh);
2202     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2203     imageinterlace($im2,true); // For progressive JPEG.
2204     $tempname=$filepath.'_TEMP.jpg';
2205     imagejpeg($im2, $tempname, 90);
2206     imagedestroy($im);
2207     imagedestroy($im2);
2208     unlink($filepath);
2209     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2210     return true;
2211 }
2212
2213 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2214 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2215 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2216     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2217 }
2218
2219 $linkDb = new LinkDB(
2220     $conf->get('resource.datastore'),
2221     isLoggedIn(),
2222     $conf->get('privacy.hide_public_links'),
2223     $conf->get('redirector.url'),
2224     $conf->get('redirector.encode_url')
2225 );
2226
2227 $container = new \Slim\Container();
2228 $container['conf'] = $conf;
2229 $container['plugins'] = $pluginManager;
2230 $app = new \Slim\App($container);
2231
2232 // REST API routes
2233 $app->group('/api/v1', function() {
2234     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo');
2235     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks');
2236     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink');
2237 })->add('\Shaarli\Api\ApiMiddleware');
2238
2239 $response = $app->run(true);
2240 // Hack to make Slim and Shaarli router work together:
2241 // If a Slim route isn't found and NOT API call, we call renderPage().
2242 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2243     // We use UTF-8 for proper international characters handling.
2244     header('Content-Type: text/html; charset=utf-8');
2245     renderPage($conf, $pluginManager, $linkDb);
2246 } else {
2247     $app->respond($response);
2248 }