index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://github.com/shaarli/Shaarli/wiki/Server-requirements\n"
  52         ."- https://github.com/shaarli/Shaarli/wiki/Download-and-Installation";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/Languages.php';
  68 require_once 'application/LinkDB.php';
  69 require_once 'application/LinkFilter.php';
  70 require_once 'application/LinkUtils.php';
  71 require_once 'application/NetscapeBookmarkUtils.php';
  72 require_once 'application/PageBuilder.php';
  73 require_once 'application/TimeZone.php';
  74 require_once 'application/Url.php';
  75 require_once 'application/Utils.php';
  76 require_once 'application/PluginManager.php';
  77 require_once 'application/Router.php';
  78 require_once 'application/Updater.php';
  79 use \Shaarli\ThemeUtils;
  80 use \Shaarli\Config\ConfigManager;
  81
  82 // Ensure the PHP version is supported
  83 try {
  84     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  85 } catch(Exception $exc) {
  86     header('Content-Type: text/plain; charset=utf-8');
  87     echo $exc->getMessage();
  88     exit;
  89 }
  90
  91 define('shaarli_version', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  92
  93 // Force cookie path (but do not change lifetime)
  94 $cookie = session_get_cookie_params();
  95 $cookiedir = '';
  96 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  97     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
  98 }
  99 // Set default cookie expiration and path.
 100 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 101 // Set session parameters on server side.
 102 // If the user does not access any page within this time, his/her session is considered expired.
 103 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 104 // Use cookies to store session.
 105 ini_set('session.use_cookies', 1);
 106 // Force cookies for session (phpsessionID forbidden in URL).
 107 ini_set('session.use_only_cookies', 1);
 108 // Prevent PHP form using sessionID in URL if cookies are disabled.
 109 ini_set('session.use_trans_sid', false);
 110
 111 session_name('shaarli');
 112 // Start session if needed (Some server auto-start sessions).
 113 if (session_id() == '') {
 114     session_start();
 115 }
 116
 117 // Regenerate session ID if invalid or not defined in cookie.
 118 if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
 119     session_regenerate_id(true);
 120     $_COOKIE['shaarli'] = session_id();
 121 }
 122
 123 $conf = new ConfigManager();
 124 $conf->setEmpty('general.timezone', date_default_timezone_get());
 125 $conf->setEmpty('general.title', 'Shared links on '. escape(index_url($_SERVER)));
 126 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 127 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 128
 129 $pluginManager = new PluginManager($conf);
 130 $pluginManager->load($conf->get('general.enabled_plugins'));
 131
 132 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 133
 134 ob_start();  // Output buffering for the page cache.
 135
 136 // In case stupid admin has left magic_quotes enabled in php.ini:
 137 if (get_magic_quotes_gpc())
 138 {
 139     function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
 140     $_POST = array_map('stripslashes_deep', $_POST);
 141     $_GET = array_map('stripslashes_deep', $_GET);
 142     $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
 143 }
 144
 145 // Prevent caching on client side or proxy: (yes, it's ugly)
 146 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 147 header("Cache-Control: no-store, no-cache, must-revalidate");
 148 header("Cache-Control: post-check=0, pre-check=0", false);
 149 header("Pragma: no-cache");
 150
 151 if (! is_file($conf->getConfigFileExt())) {
 152     // Ensure Shaarli has proper access to its resources
 153     $errors = ApplicationUtils::checkResourcePermissions($conf);
 154
 155     if ($errors != array()) {
 156         $message = '<p>Insufficient permissions:</p><ul>';
 157
 158         foreach ($errors as $error) {
 159             $message .= '<li>'.$error.'</li>';
 160         }
 161         $message .= '</ul>';
 162
 163         header('Content-Type: text/html; charset=utf-8');
 164         echo $message;
 165         exit;
 166     }
 167
 168     // Display the installation form if no existing config is found
 169     install($conf);
 170 }
 171
 172 // a token depending of deployment salt, user password, and the current ip
 173 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 174
 175 // Sniff browser language and set date format accordingly.
 176 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 177     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 178 }
 179
 180 /**
 181  * Checking session state (i.e. is the user still logged in)
 182  *
 183  * @param ConfigManager $conf The configuration manager.
 184  *
 185  * @return bool: true if the user is logged in, false otherwise.
 186  */
 187 function setup_login_state($conf)
 188 {
 189         if ($conf->get('security.open_shaarli')) {
 190             return true;
 191         }
 192         $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 193         $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 194         if (! $conf->exists('credentials.login')) {
 195             $userIsLoggedIn = false;  // Shaarli is not configured yet.
 196             $loginFailure = true;
 197         }
 198         if (isset($_COOKIE['shaarli_staySignedIn']) &&
 199             $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 200             !$loginFailure)
 201         {
 202             fillSessionInfo($conf);
 203             $userIsLoggedIn = true;
 204         }
 205         // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 206         if (empty($_SESSION['uid'])
 207         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 208         || time() >= $_SESSION['expires_on'])
 209         {
 210             logout();
 211             $userIsLoggedIn = false;
 212             $loginFailure = true;
 213         }
 214         if (!empty($_SESSION['longlastingsession'])) {
 215             $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 216         }
 217         else {
 218             $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 219         }
 220         if (!$loginFailure) {
 221             $userIsLoggedIn = true;
 222         }
 223
 224         return $userIsLoggedIn;
 225 }
 226 $userIsLoggedIn = setup_login_state($conf);
 227
 228 // ------------------------------------------------------------------------------------------
 229 // Session management
 230
 231 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 232 function allIPs()
 233 {
 234     $ip = $_SERVER['REMOTE_ADDR'];
 235     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 236     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 237     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 238     return $ip;
 239 }
 240
 241 /**
 242  * Load user session.
 243  *
 244  * @param ConfigManager $conf Configuration Manager instance.
 245  */
 246 function fillSessionInfo($conf)
 247 {
 248         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 249         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 250         $_SESSION['username']= $conf->get('credentials.login');
 251         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 252 }
 253
 254 /**
 255  * Check that user/password is correct.
 256  *
 257  * @param string        $login    Username
 258  * @param string        $password User password
 259  * @param ConfigManager $conf     Configuration Manager instance.
 260  *
 261  * @return bool: authentication successful or not.
 262  */
 263 function check_auth($login, $password, $conf)
 264 {
 265     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 266     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 267     {   // Login/password is correct.
 268                 fillSessionInfo($conf);
 269         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 270         return true;
 271     }
 272     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 273     return false;
 274 }
 275
 276 // Returns true if the user is logged in.
 277 function isLoggedIn()
 278 {
 279     global $userIsLoggedIn;
 280     return $userIsLoggedIn;
 281 }
 282
 283 // Force logout.
 284 function logout() {
 285     if (isset($_SESSION)) {
 286         unset($_SESSION['uid']);
 287         unset($_SESSION['ip']);
 288         unset($_SESSION['username']);
 289         unset($_SESSION['privateonly']);
 290     }
 291     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 292 }
 293
 294
 295 // ------------------------------------------------------------------------------------------
 296 // Brute force protection system
 297 // Several consecutive failed logins will ban the IP address for 30 minutes.
 298 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 299     // FIXME! globals
 300     file_put_contents(
 301         $conf->get('resource.ban_file', 'data/ipbans.php'),
 302         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 303     );
 304 }
 305 include $conf->get('resource.ban_file', 'data/ipbans.php');
 306 /**
 307  * Signal a failed login. Will ban the IP if too many failures:
 308  *
 309  * @param ConfigManager $conf Configuration Manager instance.
 310  */
 311 function ban_loginFailed($conf)
 312 {
 313     $ip = $_SERVER['REMOTE_ADDR'];
 314     $trusted = $conf->get('security.trusted_proxies', array());
 315     if (in_array($ip, $trusted)) {
 316         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 317         if (!$ip) {
 318             return;
 319         }
 320     }
 321     $gb = $GLOBALS['IPBANS'];
 322     if (! isset($gb['FAILURES'][$ip])) {
 323         $gb['FAILURES'][$ip]=0;
 324     }
 325     $gb['FAILURES'][$ip]++;
 326     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 327     {
 328         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 329         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 330     }
 331     $GLOBALS['IPBANS'] = $gb;
 332     file_put_contents(
 333         $conf->get('resource.ban_file', 'data/ipbans.php'),
 334         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 335     );
 336 }
 337
 338 /**
 339  * Signals a successful login. Resets failed login counter.
 340  *
 341  * @param ConfigManager $conf Configuration Manager instance.
 342  */
 343 function ban_loginOk($conf)
 344 {
 345     $ip = $_SERVER['REMOTE_ADDR'];
 346     $gb = $GLOBALS['IPBANS'];
 347     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 348     $GLOBALS['IPBANS'] = $gb;
 349     file_put_contents(
 350         $conf->get('resource.ban_file', 'data/ipbans.php'),
 351         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 352     );
 353 }
 354
 355 /**
 356  * Checks if the user CAN login. If 'true', the user can try to login.
 357  *
 358  * @param ConfigManager $conf Configuration Manager instance.
 359  *
 360  * @return bool: true if the user is allowed to login.
 361  */
 362 function ban_canLogin($conf)
 363 {
 364     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 365     if (isset($gb['BANS'][$ip]))
 366     {
 367         // User is banned. Check if the ban has expired:
 368         if ($gb['BANS'][$ip]<=time())
 369         {   // Ban expired, user can try to login again.
 370             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 371             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 372             file_put_contents(
 373                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 374                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 375             );
 376             return true; // Ban has expired, user can login.
 377         }
 378         return false; // User is banned.
 379     }
 380     return true; // User is not banned.
 381 }
 382
 383 // ------------------------------------------------------------------------------------------
 384 // Process login form: Check if login/password is correct.
 385 if (isset($_POST['login']))
 386 {
 387     if (!ban_canLogin($conf)) die('I said: NO. You are banned for the moment. Go away.');
 388     if (isset($_POST['password'])
 389         && tokenOk($_POST['token'])
 390         && (check_auth($_POST['login'], $_POST['password'], $conf))
 391     ) {   // Login/password is OK.
 392         ban_loginOk($conf);
 393         // If user wants to keep the session cookie even after the browser closes:
 394         if (!empty($_POST['longlastingsession']))
 395         {
 396                         setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
 397             $_SESSION['longlastingsession']=31536000;  // (31536000 seconds = 1 year)
 398             $_SESSION['expires_on']=time()+$_SESSION['longlastingsession'];  // Set session expiration on server-side.
 399
 400             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 401             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 402             // Note: Never forget the trailing slash on the cookie path!
 403             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 404         }
 405         else // Standard session expiration (=when browser closes)
 406         {
 407             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 408             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 409             session_regenerate_id(true);
 410         }
 411
 412         // Optional redirect after login:
 413         if (isset($_GET['post'])) {
 414             $uri = '?post='. urlencode($_GET['post']);
 415             foreach (array('description', 'source', 'title', 'tags') as $param) {
 416                 if (!empty($_GET[$param])) {
 417                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 418                 }
 419             }
 420             header('Location: '. $uri);
 421             exit;
 422         }
 423
 424         if (isset($_GET['edit_link'])) {
 425             header('Location: ?edit_link='. escape($_GET['edit_link']));
 426             exit;
 427         }
 428
 429         if (isset($_POST['returnurl'])) {
 430             // Prevent loops over login screen.
 431             if (strpos($_POST['returnurl'], 'do=login') === false) {
 432                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 433                 exit;
 434             }
 435         }
 436         header('Location: ?'); exit;
 437     }
 438     else
 439     {
 440         ban_loginFailed($conf);
 441         $redir = '&username='. $_POST['login'];
 442         if (isset($_GET['post'])) {
 443             $redir .= '&post=' . urlencode($_GET['post']);
 444             foreach (array('description', 'source', 'title', 'tags') as $param) {
 445                 if (!empty($_GET[$param])) {
 446                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 447                 }
 448             }
 449         }
 450         echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
 451         exit;
 452     }
 453 }
 454
 455 // ------------------------------------------------------------------------------------------
 456 // Token management for XSRF protection
 457 // Token should be used in any form which acts on data (create,update,delete,import...).
 458 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 459
 460 /**
 461  * Returns a token.
 462  *
 463  * @param ConfigManager $conf Configuration Manager instance.
 464  *
 465  * @return string token.
 466  */
 467 function getToken($conf)
 468 {
 469     $rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt'));  // We generate a random string.
 470     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 471     return $rnd;
 472 }
 473
 474 // Tells if a token is OK. Using this function will destroy the token.
 475 // true=token is OK.
 476 function tokenOk($token)
 477 {
 478     if (isset($_SESSION['tokens'][$token]))
 479     {
 480         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 481         return true; // Token is OK.
 482     }
 483     return false; // Wrong token, or already used.
 484 }
 485
 486 /**
 487  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 488  * Gives the last 7 days (which have links).
 489  * This RSS feed cannot be filtered.
 490  *
 491  * @param ConfigManager $conf Configuration Manager instance.
 492  */
 493 function showDailyRSS($conf) {
 494     // Cache system
 495     $query = $_SERVER['QUERY_STRING'];
 496     $cache = new CachedPage(
 497         $conf->get('config.PAGE_CACHE'),
 498         page_url($_SERVER),
 499         startsWith($query,'do=dailyrss') && !isLoggedIn()
 500     );
 501     $cached = $cache->cachedVersion();
 502     if (!empty($cached)) {
 503         echo $cached;
 504         exit;
 505     }
 506
 507     // If cached was not found (or not usable), then read the database and build the response:
 508     // Read links from database (and filter private links if used it not logged in).
 509     $LINKSDB = new LinkDB(
 510         $conf->get('resource.datastore'),
 511         isLoggedIn(),
 512         $conf->get('privacy.hide_public_links'),
 513         $conf->get('redirector.url'),
 514         $conf->get('redirector.encode_url')
 515     );
 516
 517     /* Some Shaarlies may have very few links, so we need to look
 518        back in time until we have enough days ($nb_of_days).
 519     */
 520     $nb_of_days = 7; // We take 7 days.
 521     $today = date('Ymd');
 522     $days = array();
 523
 524     foreach ($LINKSDB as $link) {
 525         $day = $link['created']->format('Ymd'); // Extract day (without time)
 526         if (strcmp($day, $today) < 0) {
 527             if (empty($days[$day])) {
 528                 $days[$day] = array();
 529             }
 530             $days[$day][] = $link;
 531         }
 532
 533         if (count($days) > $nb_of_days) {
 534             break; // Have we collected enough days?
 535         }
 536     }
 537
 538     // Build the RSS feed.
 539     header('Content-Type: application/rss+xml; charset=utf-8');
 540     $pageaddr = escape(index_url($_SERVER));
 541     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 542     echo '<channel>';
 543     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 544     echo '<link>'. $pageaddr .'</link>';
 545     echo '<description>Daily shared links</description>';
 546     echo '<language>en-en</language>';
 547     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 548
 549     // For each day.
 550     foreach ($days as $day => $links) {
 551         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 552         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 553
 554         // We pre-format some fields for proper output.
 555         foreach ($links as &$link) {
 556             $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 557             $link['thumbnail'] = thumbnail($conf, $link['url']);
 558             $link['timestamp'] = $link['created']->getTimestamp();
 559             if (startsWith($link['url'], '?')) {
 560                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 561             }
 562         }
 563
 564         // Then build the HTML for this day:
 565         $tpl = new RainTPL;
 566         $tpl->assign('title', $conf->get('general.title'));
 567         $tpl->assign('daydate', $dayDate->getTimestamp());
 568         $tpl->assign('absurl', $absurl);
 569         $tpl->assign('links', $links);
 570         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 571         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 572         $html = $tpl->draw('dailyrss', true);
 573
 574         echo $html . PHP_EOL;
 575     }
 576     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 577
 578     $cache->cache(ob_get_contents());
 579     ob_end_flush();
 580     exit;
 581 }
 582
 583 /**
 584  * Show the 'Daily' page.
 585  *
 586  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 587  * @param LinkDB        $LINKSDB       LinkDB instance.
 588  * @param ConfigManager $conf          Configuration Manager instance.
 589  * @param PluginManager $pluginManager Plugin Manager instane.
 590  */
 591 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 592 {
 593     $day=date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 594     if (isset($_GET['day'])) $day=$_GET['day'];
 595
 596     $days = $LINKSDB->days();
 597     $i = array_search($day,$days);
 598     if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
 599     $previousday='';
 600     $nextday='';
 601     if ($i!==false)
 602     {
 603         if ($i>=1) $previousday=$days[$i-1];
 604         if ($i<count($days)-1) $nextday=$days[$i+1];
 605     }
 606
 607     try {
 608         $linksToDisplay = $LINKSDB->filterDay($day);
 609     } catch (Exception $exc) {
 610         error_log($exc);
 611         $linksToDisplay = array();
 612     }
 613
 614     // We pre-format some fields for proper output.
 615     foreach($linksToDisplay as $key=>$link)
 616     {
 617
 618         $taglist = explode(' ',$link['tags']);
 619         uasort($taglist, 'strcasecmp');
 620         $linksToDisplay[$key]['taglist']=$taglist;
 621         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 622         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 623         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 624     }
 625
 626     /* We need to spread the articles on 3 columns.
 627        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 628        so I manually spread entries with a simple method: I roughly evaluate the
 629        height of a div according to title and description length.
 630     */
 631     $columns=array(array(),array(),array()); // Entries to display, for each column.
 632     $fill=array(0,0,0);  // Rough estimate of columns fill.
 633     foreach($linksToDisplay as $key=>$link)
 634     {
 635         // Roughly estimate length of entry (by counting characters)
 636         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 637         // Description: 836 characters gives roughly 342 pixel height.
 638         // This is not perfect, but it's usually OK.
 639         $length=strlen($link['title'])+(342*strlen($link['description']))/836;
 640         if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
 641         // Then put in column which is the less filled:
 642         $smallest=min($fill); // find smallest value in array.
 643         $index=array_search($smallest,$fill); // find index of this smallest value.
 644         array_push($columns[$index],$link); // Put entry in this column.
 645         $fill[$index]+=$length;
 646     }
 647
 648     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 649     $data = array(
 650         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 651         'linksToDisplay' => $linksToDisplay,
 652         'cols' => $columns,
 653         'day' => $dayDate->getTimestamp(),
 654         'dayDate' => $dayDate,
 655         'previousday' => $previousday,
 656         'nextday' => $nextday,
 657     );
 658
 659     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 660
 661     foreach ($data as $key => $value) {
 662         $pageBuilder->assign($key, $value);
 663     }
 664
 665     $pageBuilder->renderPage('daily');
 666     exit;
 667 }
 668
 669 /**
 670  * Renders the linklist
 671  *
 672  * @param pageBuilder   $PAGE    pageBuilder instance.
 673  * @param LinkDB        $LINKSDB LinkDB instance.
 674  * @param ConfigManager $conf    Configuration Manager instance.
 675  * @param PluginManager $pluginManager Plugin Manager instance.
 676  */
 677 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 678     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 679     $PAGE->renderPage('linklist');
 680 }
 681
 682 /**
 683  * Render HTML page (according to URL parameters and user rights)
 684  *
 685  * @param ConfigManager $conf          Configuration Manager instance.
 686  * @param PluginManager $pluginManager Plugin Manager instance,
 687  * @param LinkDB        $LINKSDB
 688  */
 689 function renderPage($conf, $pluginManager, $LINKSDB, $history)
 690 {
 691     $updater = new Updater(
 692         read_updates_file($conf->get('resource.updates')),
 693         $LINKSDB,
 694         $conf,
 695         isLoggedIn()
 696     );
 697     try {
 698         $newUpdates = $updater->update();
 699         if (! empty($newUpdates)) {
 700             write_updates_file(
 701                 $conf->get('resource.updates'),
 702                 $updater->getDoneUpdates()
 703             );
 704         }
 705     }
 706     catch(Exception $e) {
 707         die($e->getMessage());
 708     }
 709
 710     $PAGE = new PageBuilder($conf, $LINKSDB);
 711     $PAGE->assign('linkcount', count($LINKSDB));
 712     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 713     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 714
 715     // Determine which page will be rendered.
 716     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 717     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 718
 719     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 720     // Then assign generated data to RainTPL.
 721     $common_hooks = array(
 722         'includes',
 723         'header',
 724         'footer',
 725     );
 726
 727     foreach($common_hooks as $name) {
 728         $plugin_data = array();
 729         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 730             array(
 731                 'target' => $targetPage,
 732                 'loggedin' => isLoggedIn()
 733             )
 734         );
 735         $PAGE->assign('plugins_' . $name, $plugin_data);
 736     }
 737
 738     // -------- Display login form.
 739     if ($targetPage == Router::$PAGE_LOGIN)
 740     {
 741         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 742         if (isset($_GET['username'])) {
 743             $PAGE->assign('username', escape($_GET['username']));
 744         }
 745         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 746         $PAGE->renderPage('loginform');
 747         exit;
 748     }
 749     // -------- User wants to logout.
 750     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 751     {
 752         invalidateCaches($conf->get('resource.page_cache'));
 753         logout();
 754         header('Location: ?');
 755         exit;
 756     }
 757
 758     // -------- Picture wall
 759     if ($targetPage == Router::$PAGE_PICWALL)
 760     {
 761         // Optionally filter the results:
 762         $links = $LINKSDB->filterSearch($_GET);
 763         $linksToDisplay = array();
 764
 765         // Get only links which have a thumbnail.
 766         foreach($links as $link)
 767         {
 768             $permalink='?'.$link['shorturl'];
 769             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 770             if ($thumb!='') // Only output links which have a thumbnail.
 771             {
 772                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 773                 $linksToDisplay[]=$link; // Add to array.
 774             }
 775         }
 776
 777         $data = array(
 778             'linksToDisplay' => $linksToDisplay,
 779         );
 780         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 781
 782         foreach ($data as $key => $value) {
 783             $PAGE->assign($key, $value);
 784         }
 785
 786         $PAGE->renderPage('picwall');
 787         exit;
 788     }
 789
 790     // -------- Tag cloud
 791     if ($targetPage == Router::$PAGE_TAGCLOUD)
 792     {
 793         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 794         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 795         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 796
 797         // We sort tags alphabetically, then choose a font size according to count.
 798         // First, find max value.
 799         $maxcount = 0;
 800         foreach ($tags as $value) {
 801             $maxcount = max($maxcount, $value);
 802         }
 803
 804         alphabetical_sort($tags, true, true);
 805
 806         $tagList = array();
 807         foreach($tags as $key => $value) {
 808             // Tag font size scaling:
 809             //   default 15 and 30 logarithm bases affect scaling,
 810             //   22 and 6 are arbitrary font sizes for max and min sizes.
 811             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 812             $tagList[$key] = array(
 813                 'count' => $value,
 814                 'size' => number_format($size, 2, '.', ''),
 815             );
 816         }
 817
 818         $data = array(
 819             'search_tags' => implode(' ', $filteringTags),
 820             'tags' => $tagList,
 821         );
 822         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 823
 824         foreach ($data as $key => $value) {
 825             $PAGE->assign($key, $value);
 826         }
 827
 828         $PAGE->renderPage('tag.cloud');
 829         exit;
 830     }
 831
 832     // -------- Tag cloud
 833     if ($targetPage == Router::$PAGE_TAGLIST)
 834     {
 835         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 836         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 837         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 838
 839         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 840             alphabetical_sort($tags, false, true);
 841         }
 842
 843         $data = [
 844             'search_tags' => implode(' ', $filteringTags),
 845             'tags' => $tags,
 846         ];
 847         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 848
 849         foreach ($data as $key => $value) {
 850             $PAGE->assign($key, $value);
 851         }
 852
 853         $PAGE->renderPage('tag.list');
 854         exit;
 855     }
 856
 857     // Daily page.
 858     if ($targetPage == Router::$PAGE_DAILY) {
 859         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 860     }
 861
 862     // ATOM and RSS feed.
 863     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 864         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 865         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 866
 867         // Cache system
 868         $query = $_SERVER['QUERY_STRING'];
 869         $cache = new CachedPage(
 870             $conf->get('resource.page_cache'),
 871             page_url($_SERVER),
 872             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 873         );
 874         $cached = $cache->cachedVersion();
 875         if (!empty($cached)) {
 876             echo $cached;
 877             exit;
 878         }
 879
 880         // Generate data.
 881         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 882         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 883         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 884         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 885         $data = $feedGenerator->buildData();
 886
 887         // Process plugin hook.
 888         $pluginManager->executeHooks('render_feed', $data, array(
 889             'loggedin' => isLoggedIn(),
 890             'target' => $targetPage,
 891         ));
 892
 893         // Render the template.
 894         $PAGE->assignAll($data);
 895         $PAGE->renderPage('feed.'. $feedType);
 896         $cache->cache(ob_get_contents());
 897         ob_end_flush();
 898         exit;
 899     }
 900
 901     // Display opensearch plugin (XML)
 902     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 903         header('Content-Type: application/xml; charset=utf-8');
 904         $PAGE->assign('serverurl', index_url($_SERVER));
 905         $PAGE->renderPage('opensearch');
 906         exit;
 907     }
 908
 909     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 910     if (isset($_GET['addtag']))
 911     {
 912         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 913         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 914         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 915
 916         // Prevent redirection loop
 917         if (isset($params['addtag'])) {
 918             unset($params['addtag']);
 919         }
 920
 921         // Check if this tag is already in the search query and ignore it if it is.
 922         // Each tag is always separated by a space
 923         if (isset($params['searchtags'])) {
 924             $current_tags = explode(' ', $params['searchtags']);
 925         } else {
 926             $current_tags = array();
 927         }
 928         $addtag = true;
 929         foreach ($current_tags as $value) {
 930             if ($value === $_GET['addtag']) {
 931                 $addtag = false;
 932                 break;
 933             }
 934         }
 935         // Append the tag if necessary
 936         if (empty($params['searchtags'])) {
 937             $params['searchtags'] = trim($_GET['addtag']);
 938         }
 939         else if ($addtag) {
 940             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 941         }
 942
 943         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 944         header('Location: ?'.http_build_query($params));
 945         exit;
 946     }
 947
 948     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 949     if (isset($_GET['removetag'])) {
 950         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 951         if (empty($_SERVER['HTTP_REFERER'])) {
 952             header('Location: ?');
 953             exit;
 954         }
 955
 956         // In case browser does not send HTTP_REFERER
 957         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 958
 959         // Prevent redirection loop
 960         if (isset($params['removetag'])) {
 961             unset($params['removetag']);
 962         }
 963
 964         if (isset($params['searchtags'])) {
 965             $tags = explode(' ', $params['searchtags']);
 966             // Remove value from array $tags.
 967             $tags = array_diff($tags, array($_GET['removetag']));
 968             $params['searchtags'] = implode(' ',$tags);
 969
 970             if (empty($params['searchtags'])) {
 971                 unset($params['searchtags']);
 972             }
 973
 974             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 975         }
 976         header('Location: ?'.http_build_query($params));
 977         exit;
 978     }
 979
 980     // -------- User wants to change the number of links per page (linksperpage=...)
 981     if (isset($_GET['linksperpage'])) {
 982         if (is_numeric($_GET['linksperpage'])) {
 983             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
 984         }
 985
 986         if (! empty($_SERVER['HTTP_REFERER'])) {
 987             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
 988         } else {
 989             $location = '?';
 990         }
 991         header('Location: '. $location);
 992         exit;
 993     }
 994
 995     // -------- User wants to see only private links (toggle)
 996     if (isset($_GET['privateonly'])) {
 997         if (empty($_SESSION['privateonly'])) {
 998             $_SESSION['privateonly'] = 1; // See only private links
 999         } else {
1000             unset($_SESSION['privateonly']); // See all links
1001         }
1002
1003         if (! empty($_SERVER['HTTP_REFERER'])) {
1004             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1005         } else {
1006             $location = '?';
1007         }
1008         header('Location: '. $location);
1009         exit;
1010     }
1011
1012     // -------- Handle other actions allowed for non-logged in users:
1013     if (!isLoggedIn())
1014     {
1015         // User tries to post new link but is not logged in:
1016         // Show login screen, then redirect to ?post=...
1017         if (isset($_GET['post']))
1018         {
1019             header( // Redirect to login page, then back to post link.
1020                 'Location: ?do=login&post='.urlencode($_GET['post']).
1021                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1022                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1023                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1024                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1025             );
1026             exit;
1027         }
1028
1029         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1030         if (isset($_GET['edit_link'])) {
1031             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1032             exit;
1033         }
1034
1035         exit; // Never remove this one! All operations below are reserved for logged in user.
1036     }
1037
1038     // -------- All other functions are reserved for the registered user:
1039
1040     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1041     if ($targetPage == Router::$PAGE_TOOLS)
1042     {
1043         $data = array(
1044             'pageabsaddr' => index_url($_SERVER),
1045             'sslenabled' => !empty($_SERVER['HTTPS'])
1046         );
1047         $pluginManager->executeHooks('render_tools', $data);
1048
1049         foreach ($data as $key => $value) {
1050             $PAGE->assign($key, $value);
1051         }
1052
1053         $PAGE->renderPage('tools');
1054         exit;
1055     }
1056
1057     // -------- User wants to change his/her password.
1058     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1059     {
1060         if ($conf->get('security.open_shaarli')) {
1061             die('You are not supposed to change a password on an Open Shaarli.');
1062         }
1063
1064         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1065         {
1066             if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1067
1068             // Make sure old password is correct.
1069             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1070             if ($oldhash!= $conf->get('credentials.hash')) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1071             // Save new password
1072             // Salt renders rainbow-tables attacks useless.
1073             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1074             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1075             try {
1076                 $conf->write(isLoggedIn());
1077             }
1078             catch(Exception $e) {
1079                 error_log(
1080                     'ERROR while writing config file after changing password.' . PHP_EOL .
1081                     $e->getMessage()
1082                 );
1083
1084                 // TODO: do not handle exceptions/errors in JS.
1085                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1086                 exit;
1087             }
1088             echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1089             exit;
1090         }
1091         else // show the change password form.
1092         {
1093             $PAGE->renderPage('changepassword');
1094             exit;
1095         }
1096     }
1097
1098     // -------- User wants to change configuration
1099     if ($targetPage == Router::$PAGE_CONFIGURE)
1100     {
1101         if (!empty($_POST['title']) )
1102         {
1103             if (!tokenOk($_POST['token'])) {
1104                 die('Wrong token.'); // Go away!
1105             }
1106             $tz = 'UTC';
1107             if (!empty($_POST['continent']) && !empty($_POST['city'])
1108                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1109             ) {
1110                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1111             }
1112             $conf->set('general.timezone', $tz);
1113             $conf->set('general.title', escape($_POST['title']));
1114             $conf->set('general.header_link', escape($_POST['titleLink']));
1115             $conf->set('resource.theme', escape($_POST['theme']));
1116             $conf->set('redirector.url', escape($_POST['redirector']));
1117             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1118             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1119             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1120             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1121             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1122             $conf->set('api.enabled', !empty($_POST['enableApi']));
1123             $conf->set('api.secret', escape($_POST['apiSecret']));
1124             try {
1125                 $conf->write(isLoggedIn());
1126                 $history->updateSettings();
1127                 invalidateCaches($conf->get('resource.page_cache'));
1128             }
1129             catch(Exception $e) {
1130                 error_log(
1131                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1132                     $e->getMessage()
1133                 );
1134
1135                 // TODO: do not handle exceptions/errors in JS.
1136                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1137                 exit;
1138             }
1139             echo '<script>alert("Configuration was saved.");document.location=\'?do=configure\';</script>';
1140             exit;
1141         }
1142         else // Show the configuration form.
1143         {
1144             $PAGE->assign('title', $conf->get('general.title'));
1145             $PAGE->assign('theme', $conf->get('resource.theme'));
1146             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1147             $PAGE->assign('redirector', $conf->get('redirector.url'));
1148             list($continents, $cities) = generateTimeZoneData(
1149                 timezone_identifiers_list(),
1150                 $conf->get('general.timezone')
1151             );
1152             $PAGE->assign('continents', $continents);
1153             $PAGE->assign('cities', $cities);
1154             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1155             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1156             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1157             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1158             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1159             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1160             $PAGE->assign('api_secret', $conf->get('api.secret'));
1161             $PAGE->renderPage('configure');
1162             exit;
1163         }
1164     }
1165
1166     // -------- User wants to rename a tag or delete it
1167     if ($targetPage == Router::$PAGE_CHANGETAG)
1168     {
1169         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1170             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1171             $PAGE->renderPage('changetag');
1172             exit;
1173         }
1174
1175         if (!tokenOk($_POST['token'])) {
1176             die('Wrong token.');
1177         }
1178
1179         if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
1180             $delete = true;
1181         } else if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
1182             $delete = false;
1183         } else {
1184             $PAGE->renderPage('changetag');
1185             exit;
1186         }
1187
1188         $count = 0;
1189         $needle = trim($_POST['fromtag']);
1190         // True for case-sensitive tag search.
1191         $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1192         foreach($linksToAlter as $key => $value)
1193         {
1194             $tags = explode(' ',trim($value['tags']));
1195             if (($pos = array_search($needle,$tags)) !== false) {
1196                 if ($delete) {
1197                     unset($tags[$pos]); // Remove tag.
1198                 } else {
1199                     $tags[$pos] = trim($_POST['totag']);
1200                 }
1201                 $value['tags'] = trim(implode(' ', array_unique($tags)));
1202                 $LINKSDB[$key]=$value;
1203                 $history->updateLink($LINKSDB[$key]);
1204                 ++$count;
1205             }
1206         }
1207         $LINKSDB->save($conf->get('resource.page_cache'));
1208         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1209         $alert = $delete
1210             ? sprintf(t('The tag was removed from %d links.'), $count)
1211             : sprintf(t('The tag was renamed in %d links.'), $count);
1212         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1213         exit;
1214     }
1215
1216     // -------- User wants to add a link without using the bookmarklet: Show form.
1217     if ($targetPage == Router::$PAGE_ADDLINK)
1218     {
1219         $PAGE->renderPage('addlink');
1220         exit;
1221     }
1222
1223     // -------- User clicked the "Save" button when editing a link: Save link to database.
1224     if (isset($_POST['save_edit']))
1225     {
1226         // Go away!
1227         if (! tokenOk($_POST['token'])) {
1228             die('Wrong token.');
1229         }
1230
1231         // lf_id should only be present if the link exists.
1232         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1233         // Linkdate is kept here to:
1234         //   - use the same permalink for notes as they're displayed when creating them
1235         //   - let users hack creation date of their posts
1236         //     See: https://github.com/shaarli/Shaarli/wiki/Datastore-hacks#changing-the-timestamp-for-a-link
1237         $linkdate = escape($_POST['lf_linkdate']);
1238         if (isset($LINKSDB[$id])) {
1239             // Edit
1240             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1241             $updated = new DateTime();
1242             $shortUrl = $LINKSDB[$id]['shorturl'];
1243             $new = false;
1244         } else {
1245             // New link
1246             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1247             $updated = null;
1248             $shortUrl = link_small_hash($created, $id);
1249             $new = true;
1250         }
1251
1252         // Remove multiple spaces.
1253         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1254         // Remove first '-' char in tags.
1255         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1256         // Remove duplicates.
1257         $tags = implode(' ', array_unique(explode(' ', $tags)));
1258
1259         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1260
1261         $link = array(
1262             'id' => $id,
1263             'title' => trim($_POST['lf_title']),
1264             'url' => $url,
1265             'description' => $_POST['lf_description'],
1266             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1267             'created' => $created,
1268             'updated' => $updated,
1269             'tags' => str_replace(',', ' ', $tags),
1270             'shorturl' => $shortUrl,
1271         );
1272
1273         // If title is empty, use the URL as title.
1274         if ($link['title'] == '') {
1275             $link['title'] = $link['url'];
1276         }
1277
1278         $pluginManager->executeHooks('save_link', $link);
1279
1280         $LINKSDB[$id] = $link;
1281         $LINKSDB->save($conf->get('resource.page_cache'));
1282         if ($new) {
1283             $history->addLink($link);
1284         } else {
1285             $history->updateLink($link);
1286         }
1287
1288         // If we are called from the bookmarklet, we must close the popup:
1289         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1290             echo '<script>self.close();</script>';
1291             exit;
1292         }
1293
1294         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1295         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1296         // Scroll to the link which has been edited.
1297         $location .= '#' . $link['shorturl'];
1298         // After saving the link, redirect to the page the user was on.
1299         header('Location: '. $location);
1300         exit;
1301     }
1302
1303     // -------- User clicked the "Cancel" button when editing a link.
1304     if (isset($_POST['cancel_edit']))
1305     {
1306         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1307         if (! isset($LINKSDB[$id])) {
1308             header('Location: ?');
1309         }
1310         // If we are called from the bookmarklet, we must close the popup:
1311         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1312         $link = $LINKSDB[$id];
1313         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1314         // Scroll to the link which has been edited.
1315         $returnurl .= '#'. $link['shorturl'];
1316         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1317         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1318         exit;
1319     }
1320
1321     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1322     if ($targetPage == Router::$PAGE_DELETELINK)
1323     {
1324         if (! tokenOk($_GET['token'])) {
1325             die('Wrong token.');
1326         }
1327
1328         if (strpos($_GET['lf_linkdate'], ' ') !== false) {
1329             $ids = array_values(array_filter(preg_split('/\s+/', escape($_GET['lf_linkdate']))));
1330         } else {
1331             $ids = [$_GET['lf_linkdate']];
1332         }
1333         foreach ($ids as $id) {
1334             $id = (int) escape($id);
1335             $link = $LINKSDB[$id];
1336             $pluginManager->executeHooks('delete_link', $link);
1337             unset($LINKSDB[$id]);
1338         }
1339         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1340         $history->deleteLink($link);
1341
1342         // If we are called from the bookmarklet, we must close the popup:
1343         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1344
1345         $location = '?';
1346         if (isset($_SERVER['HTTP_REFERER'])) {
1347             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1348             $location = generateLocation(
1349                     $_SERVER['HTTP_REFERER'],
1350                     $_SERVER['HTTP_HOST'],
1351                     ['delete_link', 'edit_link', $link['shorturl']]
1352             );
1353         }
1354
1355         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1356         exit;
1357     }
1358
1359     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1360     if (isset($_GET['edit_link']))
1361     {
1362         $id = (int) escape($_GET['edit_link']);
1363         $link = $LINKSDB[$id];  // Read database
1364         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1365         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1366         $data = array(
1367             'link' => $link,
1368             'link_is_new' => false,
1369             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1370             'tags' => $LINKSDB->linksCountPerTag(),
1371         );
1372         $pluginManager->executeHooks('render_editlink', $data);
1373
1374         foreach ($data as $key => $value) {
1375             $PAGE->assign($key, $value);
1376         }
1377
1378         $PAGE->renderPage('editlink');
1379         exit;
1380     }
1381
1382     // -------- User want to post a new link: Display link edit form.
1383     if (isset($_GET['post'])) {
1384         $url = cleanup_url($_GET['post']);
1385
1386         $link_is_new = false;
1387         // Check if URL is not already in database (in this case, we will edit the existing link)
1388         $link = $LINKSDB->getLinkFromUrl($url);
1389         if (! $link)
1390         {
1391             $link_is_new = true;
1392             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1393             // Get title if it was provided in URL (by the bookmarklet).
1394             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1395             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1396             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1397             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1398             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1399             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1400             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1401                 // Short timeout to keep the application responsive
1402                 list($headers, $content) = get_http_response($url, 4);
1403                 if (strpos($headers[0], '200 OK') !== false) {
1404                     // Retrieve charset.
1405                     $charset = get_charset($headers, $content);
1406                     // Extract title.
1407                     $title = html_extract_title($content);
1408                     // Re-encode title in utf-8 if necessary.
1409                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1410                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1411                     }
1412                 }
1413             }
1414
1415             if ($url == '') {
1416                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1417                 $title = 'Note: ';
1418             }
1419             $url = escape($url);
1420             $title = escape($title);
1421
1422             $link = array(
1423                 'linkdate' => $linkdate,
1424                 'title' => $title,
1425                 'url' => $url,
1426                 'description' => $description,
1427                 'tags' => $tags,
1428                 'private' => $private,
1429             );
1430         } else {
1431             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1432         }
1433
1434         $data = array(
1435             'link' => $link,
1436             'link_is_new' => $link_is_new,
1437             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1438             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1439             'tags' => $LINKSDB->linksCountPerTag(),
1440             'default_private_links' => $conf->get('privacy.default_private_links', false),
1441         );
1442         $pluginManager->executeHooks('render_editlink', $data);
1443
1444         foreach ($data as $key => $value) {
1445             $PAGE->assign($key, $value);
1446         }
1447
1448         $PAGE->renderPage('editlink');
1449         exit;
1450     }
1451
1452     if ($targetPage == Router::$PAGE_EXPORT) {
1453         // Export links as a Netscape Bookmarks file
1454
1455         if (empty($_GET['selection'])) {
1456             $PAGE->renderPage('export');
1457             exit;
1458         }
1459
1460         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1461         $selection = $_GET['selection'];
1462         if (isset($_GET['prepend_note_url'])) {
1463             $prependNoteUrl = $_GET['prepend_note_url'];
1464         } else {
1465             $prependNoteUrl = false;
1466         }
1467
1468         try {
1469             $PAGE->assign(
1470                 'links',
1471                 NetscapeBookmarkUtils::filterAndFormat(
1472                     $LINKSDB,
1473                     $selection,
1474                     $prependNoteUrl,
1475                     index_url($_SERVER)
1476                 )
1477             );
1478         } catch (Exception $exc) {
1479             header('Content-Type: text/plain; charset=utf-8');
1480             echo $exc->getMessage();
1481             exit;
1482         }
1483         $now = new DateTime();
1484         header('Content-Type: text/html; charset=utf-8');
1485         header(
1486             'Content-disposition: attachment; filename=bookmarks_'
1487            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1488         );
1489         $PAGE->assign('date', $now->format(DateTime::RFC822));
1490         $PAGE->assign('eol', PHP_EOL);
1491         $PAGE->assign('selection', $selection);
1492         $PAGE->renderPage('export.bookmarks');
1493         exit;
1494     }
1495
1496     if ($targetPage == Router::$PAGE_IMPORT) {
1497         // Upload a Netscape bookmark dump to import its contents
1498
1499         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1500             // Show import dialog
1501             $PAGE->assign(
1502                 'maxfilesize',
1503                 get_max_upload_size(
1504                     ini_get('post_max_size'),
1505                     ini_get('upload_max_filesize'),
1506                     false
1507                 )
1508             );
1509             $PAGE->assign(
1510                 'maxfilesizeHuman',
1511                 get_max_upload_size(
1512                     ini_get('post_max_size'),
1513                     ini_get('upload_max_filesize'),
1514                     true
1515                 )
1516             );
1517             $PAGE->renderPage('import');
1518             exit;
1519         }
1520
1521         // Import bookmarks from an uploaded file
1522         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1523             // The file is too big or some form field may be missing.
1524             echo '<script>alert("The file you are trying to upload is probably'
1525                 .' bigger than what this webserver can accept ('
1526                 .get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize')).').'
1527                 .' Please upload in smaller chunks.");document.location=\'?do='
1528                 .Router::$PAGE_IMPORT .'\';</script>';
1529             exit;
1530         }
1531         if (! tokenOk($_POST['token'])) {
1532             die('Wrong token.');
1533         }
1534         $status = NetscapeBookmarkUtils::import(
1535             $_POST,
1536             $_FILES,
1537             $LINKSDB,
1538             $conf,
1539             $history
1540         );
1541         echo '<script>alert("'.$status.'");document.location=\'?do='
1542              .Router::$PAGE_IMPORT .'\';</script>';
1543         exit;
1544     }
1545
1546     // Plugin administration page
1547     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1548         $pluginMeta = $pluginManager->getPluginsMeta();
1549
1550         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1551         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1552         // Load parameters.
1553         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1554         uasort(
1555             $enabledPlugins,
1556             function($a, $b) { return $a['order'] - $b['order']; }
1557         );
1558         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1559
1560         $PAGE->assign('enabledPlugins', $enabledPlugins);
1561         $PAGE->assign('disabledPlugins', $disabledPlugins);
1562         $PAGE->renderPage('pluginsadmin');
1563         exit;
1564     }
1565
1566     // Plugin administration form action
1567     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1568         try {
1569             if (isset($_POST['parameters_form'])) {
1570                 unset($_POST['parameters_form']);
1571                 foreach ($_POST as $param => $value) {
1572                     $conf->set('plugins.'. $param, escape($value));
1573                 }
1574             }
1575             else {
1576                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1577             }
1578             $conf->write(isLoggedIn());
1579             $history->updateSettings();
1580         }
1581         catch (Exception $e) {
1582             error_log(
1583                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1584                 $e->getMessage()
1585             );
1586
1587             // TODO: do not handle exceptions/errors in JS.
1588             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1589             exit;
1590         }
1591         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1592         exit;
1593     }
1594
1595     // Get a fresh token
1596     if ($targetPage == Router::$GET_TOKEN) {
1597         header('Content-Type:text/plain');
1598         echo getToken($conf);
1599         exit;
1600     }
1601
1602     // -------- Otherwise, simply display search form and links:
1603     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1604     exit;
1605 }
1606
1607 /**
1608  * Template for the list of links (<div id="linklist">)
1609  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1610  *
1611  * @param pageBuilder   $PAGE          pageBuilder instance.
1612  * @param LinkDB        $LINKSDB       LinkDB instance.
1613  * @param ConfigManager $conf          Configuration Manager instance.
1614  * @param PluginManager $pluginManager Plugin Manager instance.
1615  */
1616 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1617 {
1618     // Used in templates
1619     if (isset($_GET['searchtags'])) {
1620         if (! empty($_GET['searchtags'])) {
1621             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1622         } else {
1623             $searchtags = false;
1624         }
1625     } else {
1626         $searchtags = '';
1627     }
1628     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1629
1630     // Smallhash filter
1631     if (! empty($_SERVER['QUERY_STRING'])
1632         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1633         try {
1634             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1635         } catch (LinkNotFoundException $e) {
1636             $PAGE->render404($e->getMessage());
1637             exit;
1638         }
1639     } else {
1640         // Filter links according search parameters.
1641         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1642         $request = [
1643             'searchtags' => $searchtags,
1644             'searchterm' => $searchterm,
1645         ];
1646         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility);
1647     }
1648
1649     // ---- Handle paging.
1650     $keys = array();
1651     foreach ($linksToDisplay as $key => $value) {
1652         $keys[] = $key;
1653     }
1654
1655
1656
1657     // Select articles according to paging.
1658     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1659     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1660     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1661     $page = $page < 1 ? 1 : $page;
1662     $page = $page > $pagecount ? $pagecount : $page;
1663     // Start index.
1664     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1665     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1666     $linkDisp = array();
1667     while ($i<$end && $i<count($keys))
1668     {
1669         $link = $linksToDisplay[$keys[$i]];
1670         $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1671         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1672         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1673         $link['timestamp'] = $link['created']->getTimestamp();
1674         if (! empty($link['updated'])) {
1675             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1676         } else {
1677             $link['updated_timestamp'] = '';
1678         }
1679         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1680         uasort($taglist, 'strcasecmp');
1681         $link['taglist'] = $taglist;
1682         // Check for both signs of a note: starting with ? and 7 chars long.
1683         if ($link['url'][0] === '?' &&
1684             strlen($link['url']) === 7) {
1685             $link['url'] = index_url($_SERVER) . $link['url'];
1686         }
1687
1688         $linkDisp[$keys[$i]] = $link;
1689         $i++;
1690     }
1691
1692     // Compute paging navigation
1693     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1694     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1695     $previous_page_url = '';
1696     if ($i != count($keys)) {
1697         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1698     }
1699     $next_page_url='';
1700     if ($page>1) {
1701         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1702     }
1703
1704     // Fill all template fields.
1705     $data = array(
1706         'previous_page_url' => $previous_page_url,
1707         'next_page_url' => $next_page_url,
1708         'page_current' => $page,
1709         'page_max' => $pagecount,
1710         'result_count' => count($linksToDisplay),
1711         'search_term' => $searchterm,
1712         'search_tags' => $searchtags,
1713         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1714         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1715         'links' => $linkDisp,
1716     );
1717
1718     // If there is only a single link, we change on-the-fly the title of the page.
1719     if (count($linksToDisplay) == 1) {
1720         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1721     }
1722
1723     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1724
1725     foreach ($data as $key => $value) {
1726         $PAGE->assign($key, $value);
1727     }
1728
1729     return;
1730 }
1731
1732 /**
1733  * Compute the thumbnail for a link.
1734  *
1735  * With a link to the original URL.
1736  * Understands various services (youtube.com...)
1737  * Input: $url = URL for which the thumbnail must be found.
1738  *        $href = if provided, this URL will be followed instead of $url
1739  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1740  * Some of them may be missing.
1741  * Return an empty array if no thumbnail available.
1742  *
1743  * @param ConfigManager $conf Configuration Manager instance.
1744  * @param string        $url
1745  * @param string|bool   $href
1746  *
1747  * @return array
1748  */
1749 function computeThumbnail($conf, $url, $href = false)
1750 {
1751     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1752     if ($href==false) $href=$url;
1753
1754     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1755     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1756     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1757     $domain = parse_url($url,PHP_URL_HOST);
1758     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1759     {
1760         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1761         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1762                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1763     }
1764     if ($domain=='youtu.be') // Youtube short links
1765     {
1766         $path = parse_url($url,PHP_URL_PATH);
1767         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1768                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1769     }
1770     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1771     {
1772         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1773         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1774                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1775     }
1776
1777     if ($domain=='imgur.com')
1778     {
1779         $path = parse_url($url,PHP_URL_PATH);
1780         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1781         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1782                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1783         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1784                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1785
1786         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1787                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1788     }
1789     if ($domain=='i.imgur.com')
1790     {
1791         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1792         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1793                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1794     }
1795     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1796     {
1797         if (strpos($url,'dailymotion.com/video/')!==false)
1798         {
1799             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1800             return array('src'=>$thumburl,
1801                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1802         }
1803     }
1804     if (endsWith($domain,'.imageshack.us'))
1805     {
1806         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1807         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1808         {
1809             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1810             return array('src'=>$thumburl,
1811                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1812         }
1813     }
1814
1815     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1816     // So we deport the thumbnail generation in order not to slow down page generation
1817     // (and we also cache the thumbnail)
1818
1819     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1820
1821     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1822         || $domain=='vimeo.com'
1823         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1824         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1825     )
1826     {
1827         if ($domain=='vimeo.com')
1828         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1829             $path = parse_url($url,PHP_URL_PATH);
1830             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1831         }
1832         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1833         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1834             $path = parse_url($url,PHP_URL_PATH);
1835             if (!preg_match('!/\d+.+?!',$path)) return array();
1836         }
1837         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1838         {   // Make sure this TED URL points to a video (/talks/...)
1839             $path = parse_url($url,PHP_URL_PATH);
1840             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1841         }
1842         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1843         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1844                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1845     }
1846
1847     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1848     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1849     // But using the extension will do.
1850     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1851     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1852     {
1853         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1854         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1855                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1856     }
1857     return array(); // No thumbnail.
1858
1859 }
1860
1861
1862 // Returns the HTML code to display a thumbnail for a link
1863 // with a link to the original URL.
1864 // Understands various services (youtube.com...)
1865 // Input: $url = URL for which the thumbnail must be found.
1866 //        $href = if provided, this URL will be followed instead of $url
1867 // Returns '' if no thumbnail available.
1868 function thumbnail($url,$href=false)
1869 {
1870     // FIXME!
1871     global $conf;
1872     $t = computeThumbnail($conf, $url,$href);
1873     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1874
1875     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1876     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1877     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1878     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1879     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1880     $html.='></a>';
1881     return $html;
1882 }
1883
1884 // Returns the HTML code to display a thumbnail for a link
1885 // for the picture wall (using lazy image loading)
1886 // Understands various services (youtube.com...)
1887 // Input: $url = URL for which the thumbnail must be found.
1888 //        $href = if provided, this URL will be followed instead of $url
1889 // Returns '' if no thumbnail available.
1890 function lazyThumbnail($conf, $url,$href=false)
1891 {
1892     // FIXME!
1893     global $conf;
1894     $t = computeThumbnail($conf, $url,$href);
1895     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1896
1897     $html='<a href="'.escape($t['href']).'">';
1898
1899     // Lazy image
1900     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1901
1902     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1903     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1904     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1905     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1906     $html.='>';
1907
1908     // No-JavaScript fallback.
1909     $html.='<noscript><img src="'.escape($t['src']).'"';
1910     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1911     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1912     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1913     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1914     $html.='></noscript></a>';
1915
1916     return $html;
1917 }
1918
1919
1920 /**
1921  * Installation
1922  * This function should NEVER be called if the file data/config.php exists.
1923  *
1924  * @param ConfigManager $conf Configuration Manager instance.
1925  */
1926 function install($conf)
1927 {
1928     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1929     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1930
1931
1932     // This part makes sure sessions works correctly.
1933     // (Because on some hosts, session.save_path may not be set correctly,
1934     // or we may not have write access to it.)
1935     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1936     {   // Step 2: Check if data in session is correct.
1937         echo '<pre>Sessions do not seem to work correctly on your server.<br>';
1938         echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
1939         echo 'It currently points to '.session_save_path().'<br>';
1940         echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
1941         echo '<br><a href="?">Click to try again.</a></pre>';
1942         die;
1943     }
1944     if (!isset($_SESSION['session_tested']))
1945     {   // Step 1 : Try to store data in session and reload page.
1946         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1947         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
1948     }
1949     if (isset($_GET['test_session']))
1950     {   // Step 3: Sessions are OK. Remove test parameter from URL.
1951         header('Location: '.index_url($_SERVER));
1952     }
1953
1954
1955     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1956     {
1957         $tz = 'UTC';
1958         if (!empty($_POST['continent']) && !empty($_POST['city'])
1959             && isTimeZoneValid($_POST['continent'], $_POST['city'])
1960         ) {
1961             $tz = $_POST['continent'].'/'.$_POST['city'];
1962         }
1963         $conf->set('general.timezone', $tz);
1964         $login = $_POST['setlogin'];
1965         $conf->set('credentials.login', $login);
1966         $salt = sha1(uniqid('', true) .'_'. mt_rand());
1967         $conf->set('credentials.salt', $salt);
1968         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1969         if (!empty($_POST['title'])) {
1970             $conf->set('general.title', escape($_POST['title']));
1971         } else {
1972             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1973         }
1974         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1975         $conf->set('api.enabled', !empty($_POST['enableApi']));
1976         $conf->set(
1977             'api.secret',
1978             generate_api_secret(
1979                 $conf->get('credentials.login'),
1980                 $conf->get('credentials.salt')
1981             )
1982         );
1983         try {
1984             // Everything is ok, let's create config file.
1985             $conf->write(isLoggedIn());
1986         }
1987         catch(Exception $e) {
1988             error_log(
1989                     'ERROR while writing config file after installation.' . PHP_EOL .
1990                     $e->getMessage()
1991                 );
1992
1993             // TODO: do not handle exceptions/errors in JS.
1994             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1995             exit;
1996         }
1997         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1998         exit;
1999     }
2000
2001     $PAGE = new PageBuilder($conf);
2002     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2003     $PAGE->assign('continents', $continents);
2004     $PAGE->assign('cities', $cities);
2005     $PAGE->renderPage('install');
2006     exit;
2007 }
2008
2009 /**
2010  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2011  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2012  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2013  * This function is called by passing the URL:
2014  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2015  * [URL] is the URL of the link (e.g. a flickr page)
2016  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2017  * The function below will fetch the image from the webservice and store it in the cache.
2018  *
2019  * @param ConfigManager $conf Configuration Manager instance,
2020  */
2021 function genThumbnail($conf)
2022 {
2023     // Make sure the parameters in the URL were generated by us.
2024     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2025     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2026
2027     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2028     // Let's see if we don't already have the image for this URL in the cache.
2029     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2030     if (is_file($cacheDir .'/'. $thumbname))
2031     {   // We have the thumbnail, just serve it:
2032         header('Content-Type: image/jpeg');
2033         echo file_get_contents($cacheDir .'/'. $thumbname);
2034         return;
2035     }
2036     // We may also serve a blank image (if service did not respond)
2037     $blankname=hash('sha1',$_GET['url']).'.gif';
2038     if (is_file($cacheDir .'/'. $blankname))
2039     {
2040         header('Content-Type: image/gif');
2041         echo file_get_contents($cacheDir .'/'. $blankname);
2042         return;
2043     }
2044
2045     // Otherwise, generate the thumbnail.
2046     $url = $_GET['url'];
2047     $domain = parse_url($url,PHP_URL_HOST);
2048
2049     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2050     {
2051         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2052         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2053
2054         // Is this a link to an image, or to a flickr page ?
2055         $imageurl='';
2056         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2057         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2058             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2059             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2060         }
2061         else // This is a flickr page (html)
2062         {
2063             // Get the flickr html page.
2064             list($headers, $content) = get_http_response($url, 20);
2065             if (strpos($headers[0], '200 OK') !== false)
2066             {
2067                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2068                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2069                 if (!empty($matches[1])) $imageurl=$matches[1];
2070
2071                 // In albums (and some other pages), the link rel="image_src" is not provided,
2072                 // but flickr provides:
2073                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2074                 if ($imageurl=='')
2075                 {
2076                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2077                     if (!empty($matches[1])) $imageurl=$matches[1];
2078                 }
2079             }
2080         }
2081
2082         if ($imageurl!='')
2083         {   // Let's download the image.
2084             // Image is 240x120, so 10 seconds to download should be enough.
2085             list($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=='vimeo.com' )
2097     {
2098         // This is more complex: we have to perform a HTTP request, then parse the result.
2099         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2100         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2101         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2102         if (strpos($headers[0], '200 OK') !== false) {
2103             $t = unserialize($content);
2104             $imageurl = $t[0]['thumbnail_medium'];
2105             // Then we download the image and serve it to our client.
2106             list($headers, $content) = get_http_response($imageurl, 10);
2107             if (strpos($headers[0], '200 OK') !== false) {
2108                 // Save image to cache.
2109                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2110                 header('Content-Type: image/jpeg');
2111                 echo $content;
2112                 return;
2113             }
2114         }
2115     }
2116
2117     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2118     {
2119         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2120         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2121         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2122         list($headers, $content) = get_http_response($url, 5);
2123         if (strpos($headers[0], '200 OK') !== false) {
2124             // Extract the link to the thumbnail
2125             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2126             if (!empty($matches[1]))
2127             {   // Let's download the image.
2128                 $imageurl=$matches[1];
2129                 // No control on image size, so wait long enough
2130                 list($headers, $content) = get_http_response($imageurl, 20);
2131                 if (strpos($headers[0], '200 OK') !== false) {
2132                     $filepath = $cacheDir .'/'. $thumbname;
2133                     file_put_contents($filepath, $content); // Save image to cache.
2134                     if (resizeImage($filepath))
2135                     {
2136                         header('Content-Type: image/jpeg');
2137                         echo file_get_contents($filepath);
2138                         return;
2139                     }
2140                 }
2141             }
2142         }
2143     }
2144
2145     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2146     {
2147         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2148         // http://xkcd.com/327/
2149         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2150         list($headers, $content) = get_http_response($url, 5);
2151         if (strpos($headers[0], '200 OK') !== false) {
2152             // Extract the link to the thumbnail
2153             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2154             if (!empty($matches[1]))
2155             {   // Let's download the image.
2156                 $imageurl=$matches[1];
2157                 // No control on image size, so wait long enough
2158                 list($headers, $content) = get_http_response($imageurl, 20);
2159                 if (strpos($headers[0], '200 OK') !== false) {
2160                     $filepath = $cacheDir.'/'.$thumbname;
2161                     // Save image to cache.
2162                     file_put_contents($filepath, $content);
2163                     if (resizeImage($filepath))
2164                     {
2165                         header('Content-Type: image/jpeg');
2166                         echo file_get_contents($filepath);
2167                         return;
2168                     }
2169                 }
2170             }
2171         }
2172     }
2173
2174     else
2175     {
2176         // For all other domains, we try to download the image and make a thumbnail.
2177         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2178         list($headers, $content) = get_http_response($url, 30);
2179         if (strpos($headers[0], '200 OK') !== false) {
2180             $filepath = $cacheDir .'/'.$thumbname;
2181             // Save image to cache.
2182             file_put_contents($filepath, $content);
2183             if (resizeImage($filepath))
2184             {
2185                 header('Content-Type: image/jpeg');
2186                 echo file_get_contents($filepath);
2187                 return;
2188             }
2189         }
2190     }
2191
2192
2193     // Otherwise, return an empty image (8x8 transparent gif)
2194     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2195     // Also put something in cache so that this URL is not requested twice.
2196     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2197     header('Content-Type: image/gif');
2198     echo $blankgif;
2199 }
2200
2201 // Make a thumbnail of the image (to width: 120 pixels)
2202 // Returns true if success, false otherwise.
2203 function resizeImage($filepath)
2204 {
2205     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2206
2207     // Trick: some stupid people rename GIF as JPEG... or else.
2208     // So we really try to open each image type whatever the extension is.
2209     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2210     $im=false;
2211     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2212     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2213     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2214     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2215     $w = imagesx($im);
2216     $h = imagesy($im);
2217     $ystart = 0; $yheight=$h;
2218     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2219     $nw = 120;   // Desired width
2220     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2221     // Resize image:
2222     $im2 = imagecreatetruecolor($nw,$nh);
2223     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2224     imageinterlace($im2,true); // For progressive JPEG.
2225     $tempname=$filepath.'_TEMP.jpg';
2226     imagejpeg($im2, $tempname, 90);
2227     imagedestroy($im);
2228     imagedestroy($im2);
2229     unlink($filepath);
2230     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2231     return true;
2232 }
2233
2234 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2235 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2236 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2237     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2238 }
2239
2240 $linkDb = new LinkDB(
2241     $conf->get('resource.datastore'),
2242     isLoggedIn(),
2243     $conf->get('privacy.hide_public_links'),
2244     $conf->get('redirector.url'),
2245     $conf->get('redirector.encode_url')
2246 );
2247
2248 try {
2249     $history = new History($conf->get('resource.history'));
2250 } catch(Exception $e) {
2251     die($e->getMessage());
2252 }
2253
2254 $container = new \Slim\Container();
2255 $container['conf'] = $conf;
2256 $container['plugins'] = $pluginManager;
2257 $container['history'] = $history;
2258 $app = new \Slim\App($container);
2259
2260 // REST API routes
2261 $app->group('/api/v1', function() {
2262     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2263     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2264     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2265     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2266     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2267     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2268     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2269 })->add('\Shaarli\Api\ApiMiddleware');
2270
2271 $response = $app->run(true);
2272 // Hack to make Slim and Shaarli router work together:
2273 // If a Slim route isn't found and NOT API call, we call renderPage().
2274 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2275     // We use UTF-8 for proper international characters handling.
2276     header('Content-Type: text/html; charset=utf-8');
2277     renderPage($conf, $pluginManager, $linkDb, $history);
2278 } else {
2279     $app->respond($response);
2280 }