index.php

   1 <?php
   2 /**
   3  * Shaarli - The personal, minimalist, super-fast, database free, bookmarking service.
   4  *
   5  * Friendly fork by the Shaarli community:
   6  *  - https://github.com/shaarli/Shaarli
   7  *
   8  * Original project by sebsauvage.net:
   9  *  - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
  10  *  - https://github.com/sebsauvage/Shaarli
  11  *
  12  * Licence: http://www.opensource.org/licenses/zlib-license.php
  13  *
  14  * Requires: PHP 5.5.x
  15  */
  16
  17 // Set 'UTC' as the default timezone if it is not defined in php.ini
  18 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
  19 if (date_default_timezone_get() == '') {
  20     date_default_timezone_set('UTC');
  21 }
  22
  23 /*
  24  * PHP configuration
  25  */
  26
  27 // http://server.com/x/shaarli --> /shaarli/
  28 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
  29
  30 // High execution time in case of problematic imports/exports.
  31 ini_set('max_input_time','60');
  32
  33 // Try to set max upload file size and read
  34 ini_set('memory_limit', '128M');
  35 ini_set('post_max_size', '16M');
  36 ini_set('upload_max_filesize', '16M');
  37
  38 // See all error except warnings
  39 error_reporting(E_ALL^E_WARNING);
  40 // See all errors (for debugging only)
  41 //error_reporting(-1);
  42
  43
  44 // 3rd-party libraries
  45 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
  46     header('Content-Type: text/plain; charset=utf-8');
  47     echo "Error: missing Composer configuration\n\n"
  48         ."If you installed Shaarli through Git or using the development branch,\n"
  49         ."please refer to the installation documentation to install PHP"
  50         ." dependencies using Composer:\n"
  51         ."- https://shaarli.readthedocs.io/en/master/Server-requirements/\n"
  52         ."- https://shaarli.readthedocs.io/en/master/Download-and-Installation/";
  53     exit;
  54 }
  55 require_once 'inc/rain.tpl.class.php';
  56 require_once __DIR__ . '/vendor/autoload.php';
  57
  58 // Shaarli library
  59 require_once 'application/ApplicationUtils.php';
  60 require_once 'application/Cache.php';
  61 require_once 'application/CachedPage.php';
  62 require_once 'application/config/ConfigPlugin.php';
  63 require_once 'application/FeedBuilder.php';
  64 require_once 'application/FileUtils.php';
  65 require_once 'application/History.php';
  66 require_once 'application/HttpUtils.php';
  67 require_once 'application/LinkDB.php';
  68 require_once 'application/LinkFilter.php';
  69 require_once 'application/LinkUtils.php';
  70 require_once 'application/NetscapeBookmarkUtils.php';
  71 require_once 'application/PageBuilder.php';
  72 require_once 'application/TimeZone.php';
  73 require_once 'application/Url.php';
  74 require_once 'application/Utils.php';
  75 require_once 'application/PluginManager.php';
  76 require_once 'application/Router.php';
  77 require_once 'application/Updater.php';
  78 use \Shaarli\Languages;
  79 use \Shaarli\ThemeUtils;
  80 use \Shaarli\Config\ConfigManager;
  81
  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 $conf = new ConfigManager();
 124
 125 // Sniff browser language and set date format accordingly.
 126 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 127     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 128 }
 129
 130 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 131
 132 $conf->setEmpty('general.timezone', date_default_timezone_get());
 133 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 134 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 135 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 136
 137 $pluginManager = new PluginManager($conf);
 138 $pluginManager->load($conf->get('general.enabled_plugins'));
 139
 140 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 141
 142 ob_start();  // Output buffering for the page cache.
 143
 144 // Prevent caching on client side or proxy: (yes, it's ugly)
 145 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 146 header("Cache-Control: no-store, no-cache, must-revalidate");
 147 header("Cache-Control: post-check=0, pre-check=0", false);
 148 header("Pragma: no-cache");
 149
 150 if (! is_file($conf->getConfigFileExt())) {
 151     // Ensure Shaarli has proper access to its resources
 152     $errors = ApplicationUtils::checkResourcePermissions($conf);
 153
 154     if ($errors != array()) {
 155         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 156
 157         foreach ($errors as $error) {
 158             $message .= '<li>'.$error.'</li>';
 159         }
 160         $message .= '</ul>';
 161
 162         header('Content-Type: text/html; charset=utf-8');
 163         echo $message;
 164         exit;
 165     }
 166
 167     // Display the installation form if no existing config is found
 168     install($conf);
 169 }
 170
 171 // a token depending of deployment salt, user password, and the current ip
 172 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 173
 174 /**
 175  * Checking session state (i.e. is the user still logged in)
 176  *
 177  * @param ConfigManager $conf The configuration manager.
 178  *
 179  * @return bool: true if the user is logged in, false otherwise.
 180  */
 181 function setup_login_state($conf)
 182 {
 183     if ($conf->get('security.open_shaarli')) {
 184         return true;
 185     }
 186     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 187     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 188     if (! $conf->exists('credentials.login')) {
 189         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 190         $loginFailure = true;
 191     }
 192     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 193         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 194         !$loginFailure)
 195     {
 196         fillSessionInfo($conf);
 197         $userIsLoggedIn = true;
 198     }
 199     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 200     if (empty($_SESSION['uid'])
 201         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 202         || time() >= $_SESSION['expires_on'])
 203     {
 204         logout();
 205         $userIsLoggedIn = false;
 206         $loginFailure = true;
 207     }
 208     if (!empty($_SESSION['longlastingsession'])) {
 209         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 210     }
 211     else {
 212         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 213     }
 214     if (!$loginFailure) {
 215         $userIsLoggedIn = true;
 216     }
 217
 218     return $userIsLoggedIn;
 219 }
 220 $userIsLoggedIn = setup_login_state($conf);
 221
 222 // ------------------------------------------------------------------------------------------
 223 // Session management
 224
 225 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 226 function allIPs()
 227 {
 228     $ip = $_SERVER['REMOTE_ADDR'];
 229     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 230     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 231     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 232     return $ip;
 233 }
 234
 235 /**
 236  * Load user session.
 237  *
 238  * @param ConfigManager $conf Configuration Manager instance.
 239  */
 240 function fillSessionInfo($conf)
 241 {
 242     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 243     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 244     $_SESSION['username']= $conf->get('credentials.login');
 245     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 246 }
 247
 248 /**
 249  * Check that user/password is correct.
 250  *
 251  * @param string        $login    Username
 252  * @param string        $password User password
 253  * @param ConfigManager $conf     Configuration Manager instance.
 254  *
 255  * @return bool: authentication successful or not.
 256  */
 257 function check_auth($login, $password, $conf)
 258 {
 259     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 260     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 261     {   // Login/password is correct.
 262         fillSessionInfo($conf);
 263         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 264         return true;
 265     }
 266     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 267     return false;
 268 }
 269
 270 // Returns true if the user is logged in.
 271 function isLoggedIn()
 272 {
 273     global $userIsLoggedIn;
 274     return $userIsLoggedIn;
 275 }
 276
 277 // Force logout.
 278 function logout() {
 279     if (isset($_SESSION)) {
 280         unset($_SESSION['uid']);
 281         unset($_SESSION['ip']);
 282         unset($_SESSION['username']);
 283         unset($_SESSION['privateonly']);
 284         unset($_SESSION['untaggedonly']);
 285     }
 286     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 287 }
 288
 289
 290 // ------------------------------------------------------------------------------------------
 291 // Brute force protection system
 292 // Several consecutive failed logins will ban the IP address for 30 minutes.
 293 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 294     // FIXME! globals
 295     file_put_contents(
 296         $conf->get('resource.ban_file', 'data/ipbans.php'),
 297         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 298     );
 299 }
 300 include $conf->get('resource.ban_file', 'data/ipbans.php');
 301 /**
 302  * Signal a failed login. Will ban the IP if too many failures:
 303  *
 304  * @param ConfigManager $conf Configuration Manager instance.
 305  */
 306 function ban_loginFailed($conf)
 307 {
 308     $ip = $_SERVER['REMOTE_ADDR'];
 309     $trusted = $conf->get('security.trusted_proxies', array());
 310     if (in_array($ip, $trusted)) {
 311         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 312         if (!$ip) {
 313             return;
 314         }
 315     }
 316     $gb = $GLOBALS['IPBANS'];
 317     if (! isset($gb['FAILURES'][$ip])) {
 318         $gb['FAILURES'][$ip]=0;
 319     }
 320     $gb['FAILURES'][$ip]++;
 321     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 322     {
 323         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 324         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 325     }
 326     $GLOBALS['IPBANS'] = $gb;
 327     file_put_contents(
 328         $conf->get('resource.ban_file', 'data/ipbans.php'),
 329         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 330     );
 331 }
 332
 333 /**
 334  * Signals a successful login. Resets failed login counter.
 335  *
 336  * @param ConfigManager $conf Configuration Manager instance.
 337  */
 338 function ban_loginOk($conf)
 339 {
 340     $ip = $_SERVER['REMOTE_ADDR'];
 341     $gb = $GLOBALS['IPBANS'];
 342     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 343     $GLOBALS['IPBANS'] = $gb;
 344     file_put_contents(
 345         $conf->get('resource.ban_file', 'data/ipbans.php'),
 346         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 347     );
 348 }
 349
 350 /**
 351  * Checks if the user CAN login. If 'true', the user can try to login.
 352  *
 353  * @param ConfigManager $conf Configuration Manager instance.
 354  *
 355  * @return bool: true if the user is allowed to login.
 356  */
 357 function ban_canLogin($conf)
 358 {
 359     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 360     if (isset($gb['BANS'][$ip]))
 361     {
 362         // User is banned. Check if the ban has expired:
 363         if ($gb['BANS'][$ip]<=time())
 364         {   // Ban expired, user can try to login again.
 365             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 366             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 367             file_put_contents(
 368                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 369                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 370             );
 371             return true; // Ban has expired, user can login.
 372         }
 373         return false; // User is banned.
 374     }
 375     return true; // User is not banned.
 376 }
 377
 378 // ------------------------------------------------------------------------------------------
 379 // Process login form: Check if login/password is correct.
 380 if (isset($_POST['login']))
 381 {
 382     if (!ban_canLogin($conf)) die(t('I said: NO. You are banned for the moment. Go away.'));
 383     if (isset($_POST['password'])
 384         && tokenOk($_POST['token'])
 385         && (check_auth($_POST['login'], $_POST['password'], $conf))
 386     ) {   // Login/password is OK.
 387         ban_loginOk($conf);
 388         // If user wants to keep the session cookie even after the browser closes:
 389         if (!empty($_POST['longlastingsession']))
 390         {
 391             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 392             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 393             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 394             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 395
 396             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 397             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 398             // Note: Never forget the trailing slash on the cookie path!
 399             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 400         }
 401         else // Standard session expiration (=when browser closes)
 402         {
 403             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 404             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 405             session_regenerate_id(true);
 406         }
 407
 408         // Optional redirect after login:
 409         if (isset($_GET['post'])) {
 410             $uri = '?post='. urlencode($_GET['post']);
 411             foreach (array('description', 'source', 'title', 'tags') as $param) {
 412                 if (!empty($_GET[$param])) {
 413                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 414                 }
 415             }
 416             header('Location: '. $uri);
 417             exit;
 418         }
 419
 420         if (isset($_GET['edit_link'])) {
 421             header('Location: ?edit_link='. escape($_GET['edit_link']));
 422             exit;
 423         }
 424
 425         if (isset($_POST['returnurl'])) {
 426             // Prevent loops over login screen.
 427             if (strpos($_POST['returnurl'], 'do=login') === false) {
 428                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 429                 exit;
 430             }
 431         }
 432         header('Location: ?'); exit;
 433     }
 434     else
 435     {
 436         ban_loginFailed($conf);
 437         $redir = '&username='. $_POST['login'];
 438         if (isset($_GET['post'])) {
 439             $redir .= '&post=' . urlencode($_GET['post']);
 440             foreach (array('description', 'source', 'title', 'tags') as $param) {
 441                 if (!empty($_GET[$param])) {
 442                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 443                 }
 444             }
 445         }
 446         // Redirect to login screen.
 447         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 448         exit;
 449     }
 450 }
 451
 452 // ------------------------------------------------------------------------------------------
 453 // Token management for XSRF protection
 454 // Token should be used in any form which acts on data (create,update,delete,import...).
 455 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 456
 457 /**
 458  * Returns a token.
 459  *
 460  * @param ConfigManager $conf Configuration Manager instance.
 461  *
 462  * @return string token.
 463  */
 464 function getToken($conf)
 465 {
 466     $rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt'));  // We generate a random string.
 467     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 468     return $rnd;
 469 }
 470
 471 // Tells if a token is OK. Using this function will destroy the token.
 472 // true=token is OK.
 473 function tokenOk($token)
 474 {
 475     if (isset($_SESSION['tokens'][$token]))
 476     {
 477         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 478         return true; // Token is OK.
 479     }
 480     return false; // Wrong token, or already used.
 481 }
 482
 483 /**
 484  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 485  * Gives the last 7 days (which have links).
 486  * This RSS feed cannot be filtered.
 487  *
 488  * @param ConfigManager $conf Configuration Manager instance.
 489  */
 490 function showDailyRSS($conf) {
 491     // Cache system
 492     $query = $_SERVER['QUERY_STRING'];
 493     $cache = new CachedPage(
 494         $conf->get('config.PAGE_CACHE'),
 495         page_url($_SERVER),
 496         startsWith($query,'do=dailyrss') && !isLoggedIn()
 497     );
 498     $cached = $cache->cachedVersion();
 499     if (!empty($cached)) {
 500         echo $cached;
 501         exit;
 502     }
 503
 504     // If cached was not found (or not usable), then read the database and build the response:
 505     // Read links from database (and filter private links if used it not logged in).
 506     $LINKSDB = new LinkDB(
 507         $conf->get('resource.datastore'),
 508         isLoggedIn(),
 509         $conf->get('privacy.hide_public_links'),
 510         $conf->get('redirector.url'),
 511         $conf->get('redirector.encode_url')
 512     );
 513
 514     /* Some Shaarlies may have very few links, so we need to look
 515        back in time until we have enough days ($nb_of_days).
 516     */
 517     $nb_of_days = 7; // We take 7 days.
 518     $today = date('Ymd');
 519     $days = array();
 520
 521     foreach ($LINKSDB as $link) {
 522         $day = $link['created']->format('Ymd'); // Extract day (without time)
 523         if (strcmp($day, $today) < 0) {
 524             if (empty($days[$day])) {
 525                 $days[$day] = array();
 526             }
 527             $days[$day][] = $link;
 528         }
 529
 530         if (count($days) > $nb_of_days) {
 531             break; // Have we collected enough days?
 532         }
 533     }
 534
 535     // Build the RSS feed.
 536     header('Content-Type: application/rss+xml; charset=utf-8');
 537     $pageaddr = escape(index_url($_SERVER));
 538     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 539     echo '<channel>';
 540     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 541     echo '<link>'. $pageaddr .'</link>';
 542     echo '<description>Daily shared links</description>';
 543     echo '<language>en-en</language>';
 544     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 545
 546     // For each day.
 547     foreach ($days as $day => $links) {
 548         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 549         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 550
 551         // We pre-format some fields for proper output.
 552         foreach ($links as &$link) {
 553             $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 554             $link['thumbnail'] = thumbnail($conf, $link['url']);
 555             $link['timestamp'] = $link['created']->getTimestamp();
 556             if (startsWith($link['url'], '?')) {
 557                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 558             }
 559         }
 560
 561         // Then build the HTML for this day:
 562         $tpl = new RainTPL;
 563         $tpl->assign('title', $conf->get('general.title'));
 564         $tpl->assign('daydate', $dayDate->getTimestamp());
 565         $tpl->assign('absurl', $absurl);
 566         $tpl->assign('links', $links);
 567         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 568         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 569         $html = $tpl->draw('dailyrss', true);
 570
 571         echo $html . PHP_EOL;
 572     }
 573     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 574
 575     $cache->cache(ob_get_contents());
 576     ob_end_flush();
 577     exit;
 578 }
 579
 580 /**
 581  * Show the 'Daily' page.
 582  *
 583  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 584  * @param LinkDB        $LINKSDB       LinkDB instance.
 585  * @param ConfigManager $conf          Configuration Manager instance.
 586  * @param PluginManager $pluginManager Plugin Manager instane.
 587  */
 588 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 589 {
 590     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 591     if (isset($_GET['day'])) {
 592       $day = $_GET['day'];
 593     }
 594
 595     $days = $LINKSDB->days();
 596     $i = array_search($day, $days);
 597     if ($i === false && count($days)) {
 598         // no links for day, but at least one day with links
 599         $i = count($days) - 1;
 600         $day = $days[$i];
 601     }
 602     $previousday = '';
 603     $nextday = '';
 604
 605     if ($i !== false) {
 606         if ($i >= 1) {
 607              $previousday=$days[$i - 1];
 608         }
 609         if ($i < count($days) - 1) {
 610           $nextday = $days[$i + 1];
 611         }
 612     }
 613     try {
 614         $linksToDisplay = $LINKSDB->filterDay($day);
 615     } catch (Exception $exc) {
 616         error_log($exc);
 617         $linksToDisplay = array();
 618     }
 619
 620     // We pre-format some fields for proper output.
 621     foreach($linksToDisplay as $key => $link) {
 622         $taglist = explode(' ',$link['tags']);
 623         uasort($taglist, 'strcasecmp');
 624         $linksToDisplay[$key]['taglist']=$taglist;
 625         $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
 626         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 627         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 628     }
 629
 630     /* We need to spread the articles on 3 columns.
 631        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 632        so I manually spread entries with a simple method: I roughly evaluate the
 633        height of a div according to title and description length.
 634     */
 635     $columns = array(array(), array(), array()); // Entries to display, for each column.
 636     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 637     foreach($linksToDisplay as $key => $link) {
 638         // Roughly estimate length of entry (by counting characters)
 639         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 640         // Description: 836 characters gives roughly 342 pixel height.
 641         // This is not perfect, but it's usually OK.
 642         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 643         if ($link['thumbnail']) {
 644           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 645         }
 646         // Then put in column which is the less filled:
 647         $smallest = min($fill); // find smallest value in array.
 648         $index = array_search($smallest, $fill); // find index of this smallest value.
 649         array_push($columns[$index], $link); // Put entry in this column.
 650         $fill[$index] += $length;
 651     }
 652
 653     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 654     $data = array(
 655         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 656         'linksToDisplay' => $linksToDisplay,
 657         'cols' => $columns,
 658         'day' => $dayDate->getTimestamp(),
 659         'dayDate' => $dayDate,
 660         'previousday' => $previousday,
 661         'nextday' => $nextday,
 662     );
 663
 664     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 665
 666     foreach ($data as $key => $value) {
 667         $pageBuilder->assign($key, $value);
 668     }
 669
 670     $pageBuilder->renderPage('daily');
 671     exit;
 672 }
 673
 674 /**
 675  * Renders the linklist
 676  *
 677  * @param pageBuilder   $PAGE    pageBuilder instance.
 678  * @param LinkDB        $LINKSDB LinkDB instance.
 679  * @param ConfigManager $conf    Configuration Manager instance.
 680  * @param PluginManager $pluginManager Plugin Manager instance.
 681  */
 682 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 683     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 684     $PAGE->renderPage('linklist');
 685 }
 686
 687 /**
 688  * Render HTML page (according to URL parameters and user rights)
 689  *
 690  * @param ConfigManager $conf          Configuration Manager instance.
 691  * @param PluginManager $pluginManager Plugin Manager instance,
 692  * @param LinkDB        $LINKSDB
 693  * @param History       $history       instance
 694  */
 695 function renderPage($conf, $pluginManager, $LINKSDB, $history)
 696 {
 697     $updater = new Updater(
 698         read_updates_file($conf->get('resource.updates')),
 699         $LINKSDB,
 700         $conf,
 701         isLoggedIn()
 702     );
 703     try {
 704         $newUpdates = $updater->update();
 705         if (! empty($newUpdates)) {
 706             write_updates_file(
 707                 $conf->get('resource.updates'),
 708                 $updater->getDoneUpdates()
 709             );
 710         }
 711     }
 712     catch(Exception $e) {
 713         die($e->getMessage());
 714     }
 715
 716     $PAGE = new PageBuilder($conf, $LINKSDB);
 717     $PAGE->assign('linkcount', count($LINKSDB));
 718     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 719     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 720
 721     // Determine which page will be rendered.
 722     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 723     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 724
 725     if (
 726         // if the user isn't logged in
 727         !isLoggedIn() &&
 728         // and Shaarli doesn't have public content...
 729         $conf->get('privacy.hide_public_links') &&
 730         // and is configured to enforce the login
 731         $conf->get('privacy.force_login') &&
 732         // and the current page isn't already the login page
 733         $targetPage !== Router::$PAGE_LOGIN &&
 734         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 735         $targetPage !== Router::$PAGE_FEED_ATOM &&
 736         $targetPage !== Router::$PAGE_FEED_RSS
 737     ) {
 738         // force current page to be the login page
 739         $targetPage = Router::$PAGE_LOGIN;
 740     }
 741
 742     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 743     // Then assign generated data to RainTPL.
 744     $common_hooks = array(
 745         'includes',
 746         'header',
 747         'footer',
 748     );
 749
 750     foreach($common_hooks as $name) {
 751         $plugin_data = array();
 752         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 753             array(
 754                 'target' => $targetPage,
 755                 'loggedin' => isLoggedIn()
 756             )
 757         );
 758         $PAGE->assign('plugins_' . $name, $plugin_data);
 759     }
 760
 761     // -------- Display login form.
 762     if ($targetPage == Router::$PAGE_LOGIN)
 763     {
 764         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 765         if (isset($_GET['username'])) {
 766             $PAGE->assign('username', escape($_GET['username']));
 767         }
 768         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 769         // add default state of the 'remember me' checkbox
 770         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 771         $PAGE->renderPage('loginform');
 772         exit;
 773     }
 774     // -------- User wants to logout.
 775     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 776     {
 777         invalidateCaches($conf->get('resource.page_cache'));
 778         logout();
 779         header('Location: ?');
 780         exit;
 781     }
 782
 783     // -------- Picture wall
 784     if ($targetPage == Router::$PAGE_PICWALL)
 785     {
 786         // Optionally filter the results:
 787         $links = $LINKSDB->filterSearch($_GET);
 788         $linksToDisplay = array();
 789
 790         // Get only links which have a thumbnail.
 791         foreach($links as $link)
 792         {
 793             $permalink='?'.$link['shorturl'];
 794             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 795             if ($thumb!='') // Only output links which have a thumbnail.
 796             {
 797                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 798                 $linksToDisplay[]=$link; // Add to array.
 799             }
 800         }
 801
 802         $data = array(
 803             'linksToDisplay' => $linksToDisplay,
 804         );
 805         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 806
 807         foreach ($data as $key => $value) {
 808             $PAGE->assign($key, $value);
 809         }
 810
 811         $PAGE->renderPage('picwall');
 812         exit;
 813     }
 814
 815     // -------- Tag cloud
 816     if ($targetPage == Router::$PAGE_TAGCLOUD)
 817     {
 818         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 819         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 820         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 821
 822         // We sort tags alphabetically, then choose a font size according to count.
 823         // First, find max value.
 824         $maxcount = 0;
 825         foreach ($tags as $value) {
 826             $maxcount = max($maxcount, $value);
 827         }
 828
 829         alphabetical_sort($tags, false, true);
 830
 831         $tagList = array();
 832         foreach($tags as $key => $value) {
 833             if (in_array($key, $filteringTags)) {
 834                 continue;
 835             }
 836             // Tag font size scaling:
 837             //   default 15 and 30 logarithm bases affect scaling,
 838             //   22 and 6 are arbitrary font sizes for max and min sizes.
 839             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 840             $tagList[$key] = array(
 841                 'count' => $value,
 842                 'size' => number_format($size, 2, '.', ''),
 843             );
 844         }
 845
 846         $data = array(
 847             'search_tags' => implode(' ', escape($filteringTags)),
 848             'tags' => $tagList,
 849         );
 850         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 851
 852         foreach ($data as $key => $value) {
 853             $PAGE->assign($key, $value);
 854         }
 855
 856         $PAGE->renderPage('tag.cloud');
 857         exit;
 858     }
 859
 860     // -------- Tag list
 861     if ($targetPage == Router::$PAGE_TAGLIST)
 862     {
 863         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
 864         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 865         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 866         foreach ($filteringTags as $tag) {
 867             if (array_key_exists($tag, $tags)) {
 868                 unset($tags[$tag]);
 869             }
 870         }
 871
 872         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 873             alphabetical_sort($tags, false, true);
 874         }
 875
 876         $data = [
 877             'search_tags' => implode(' ', escape($filteringTags)),
 878             'tags' => $tags,
 879         ];
 880         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 881
 882         foreach ($data as $key => $value) {
 883             $PAGE->assign($key, $value);
 884         }
 885
 886         $PAGE->renderPage('tag.list');
 887         exit;
 888     }
 889
 890     // Daily page.
 891     if ($targetPage == Router::$PAGE_DAILY) {
 892         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 893     }
 894
 895     // ATOM and RSS feed.
 896     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 897         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 898         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 899
 900         // Cache system
 901         $query = $_SERVER['QUERY_STRING'];
 902         $cache = new CachedPage(
 903             $conf->get('resource.page_cache'),
 904             page_url($_SERVER),
 905             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 906         );
 907         $cached = $cache->cachedVersion();
 908         if (!empty($cached)) {
 909             echo $cached;
 910             exit;
 911         }
 912
 913         // Generate data.
 914         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 915         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 916         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 917         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 918         $data = $feedGenerator->buildData();
 919
 920         // Process plugin hook.
 921         $pluginManager->executeHooks('render_feed', $data, array(
 922             'loggedin' => isLoggedIn(),
 923             'target' => $targetPage,
 924         ));
 925
 926         // Render the template.
 927         $PAGE->assignAll($data);
 928         $PAGE->renderPage('feed.'. $feedType);
 929         $cache->cache(ob_get_contents());
 930         ob_end_flush();
 931         exit;
 932     }
 933
 934     // Display opensearch plugin (XML)
 935     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 936         header('Content-Type: application/xml; charset=utf-8');
 937         $PAGE->assign('serverurl', index_url($_SERVER));
 938         $PAGE->renderPage('opensearch');
 939         exit;
 940     }
 941
 942     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 943     if (isset($_GET['addtag']))
 944     {
 945         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 946         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 947         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 948
 949         // Prevent redirection loop
 950         if (isset($params['addtag'])) {
 951             unset($params['addtag']);
 952         }
 953
 954         // Check if this tag is already in the search query and ignore it if it is.
 955         // Each tag is always separated by a space
 956         if (isset($params['searchtags'])) {
 957             $current_tags = explode(' ', $params['searchtags']);
 958         } else {
 959             $current_tags = array();
 960         }
 961         $addtag = true;
 962         foreach ($current_tags as $value) {
 963             if ($value === $_GET['addtag']) {
 964                 $addtag = false;
 965                 break;
 966             }
 967         }
 968         // Append the tag if necessary
 969         if (empty($params['searchtags'])) {
 970             $params['searchtags'] = trim($_GET['addtag']);
 971         }
 972         else if ($addtag) {
 973             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 974         }
 975
 976         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 977         header('Location: ?'.http_build_query($params));
 978         exit;
 979     }
 980
 981     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 982     if (isset($_GET['removetag'])) {
 983         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 984         if (empty($_SERVER['HTTP_REFERER'])) {
 985             header('Location: ?');
 986             exit;
 987         }
 988
 989         // In case browser does not send HTTP_REFERER
 990         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 991
 992         // Prevent redirection loop
 993         if (isset($params['removetag'])) {
 994             unset($params['removetag']);
 995         }
 996
 997         if (isset($params['searchtags'])) {
 998             $tags = explode(' ', $params['searchtags']);
 999             // Remove value from array $tags.
1000             $tags = array_diff($tags, array($_GET['removetag']));
1001             $params['searchtags'] = implode(' ',$tags);
1002
1003             if (empty($params['searchtags'])) {
1004                 unset($params['searchtags']);
1005             }
1006
1007             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1008         }
1009         header('Location: ?'.http_build_query($params));
1010         exit;
1011     }
1012
1013     // -------- User wants to change the number of links per page (linksperpage=...)
1014     if (isset($_GET['linksperpage'])) {
1015         if (is_numeric($_GET['linksperpage'])) {
1016             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1017         }
1018
1019         if (! empty($_SERVER['HTTP_REFERER'])) {
1020             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1021         } else {
1022             $location = '?';
1023         }
1024         header('Location: '. $location);
1025         exit;
1026     }
1027
1028     // -------- User wants to see only private links (toggle)
1029     if (isset($_GET['privateonly'])) {
1030         if (empty($_SESSION['privateonly'])) {
1031             $_SESSION['privateonly'] = 1; // See only private links
1032         } else {
1033             unset($_SESSION['privateonly']); // See all links
1034         }
1035
1036         if (! empty($_SERVER['HTTP_REFERER'])) {
1037             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly'));
1038         } else {
1039             $location = '?';
1040         }
1041         header('Location: '. $location);
1042         exit;
1043     }
1044
1045     // -------- User wants to see only untagged links (toggle)
1046     if (isset($_GET['untaggedonly'])) {
1047         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1048
1049         if (! empty($_SERVER['HTTP_REFERER'])) {
1050             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1051         } else {
1052             $location = '?';
1053         }
1054         header('Location: '. $location);
1055         exit;
1056     }
1057
1058     // -------- Handle other actions allowed for non-logged in users:
1059     if (!isLoggedIn())
1060     {
1061         // User tries to post new link but is not logged in:
1062         // Show login screen, then redirect to ?post=...
1063         if (isset($_GET['post']))
1064         {
1065             header( // Redirect to login page, then back to post link.
1066                 'Location: ?do=login&post='.urlencode($_GET['post']).
1067                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1068                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1069                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1070                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1071             );
1072             exit;
1073         }
1074
1075         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1076         if (isset($_GET['edit_link'])) {
1077             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1078             exit;
1079         }
1080
1081         exit; // Never remove this one! All operations below are reserved for logged in user.
1082     }
1083
1084     // -------- All other functions are reserved for the registered user:
1085
1086     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1087     if ($targetPage == Router::$PAGE_TOOLS)
1088     {
1089         $data = [
1090             'pageabsaddr' => index_url($_SERVER),
1091             'sslenabled' => is_https($_SERVER),
1092         ];
1093         $pluginManager->executeHooks('render_tools', $data);
1094
1095         foreach ($data as $key => $value) {
1096             $PAGE->assign($key, $value);
1097         }
1098
1099         $PAGE->renderPage('tools');
1100         exit;
1101     }
1102
1103     // -------- User wants to change his/her password.
1104     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1105     {
1106         if ($conf->get('security.open_shaarli')) {
1107             die(t('You are not supposed to change a password on an Open Shaarli.'));
1108         }
1109
1110         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1111         {
1112             if (!tokenOk($_POST['token'])) die(t('Wrong token.')); // Go away!
1113
1114             // Make sure old password is correct.
1115             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1116             if ($oldhash!= $conf->get('credentials.hash')) {
1117                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1118                 exit;
1119             }
1120             // Save new password
1121             // Salt renders rainbow-tables attacks useless.
1122             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1123             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1124             try {
1125                 $conf->write(isLoggedIn());
1126             }
1127             catch(Exception $e) {
1128                 error_log(
1129                     'ERROR while writing config file after changing password.' . PHP_EOL .
1130                     $e->getMessage()
1131                 );
1132
1133                 // TODO: do not handle exceptions/errors in JS.
1134                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1135                 exit;
1136             }
1137             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1138             exit;
1139         }
1140         else // show the change password form.
1141         {
1142             $PAGE->renderPage('changepassword');
1143             exit;
1144         }
1145     }
1146
1147     // -------- User wants to change configuration
1148     if ($targetPage == Router::$PAGE_CONFIGURE)
1149     {
1150         if (!empty($_POST['title']) )
1151         {
1152             if (!tokenOk($_POST['token'])) {
1153                 die(t('Wrong token.')); // Go away!
1154             }
1155             $tz = 'UTC';
1156             if (!empty($_POST['continent']) && !empty($_POST['city'])
1157                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1158             ) {
1159                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1160             }
1161             $conf->set('general.timezone', $tz);
1162             $conf->set('general.title', escape($_POST['title']));
1163             $conf->set('general.header_link', escape($_POST['titleLink']));
1164             $conf->set('resource.theme', escape($_POST['theme']));
1165             $conf->set('redirector.url', escape($_POST['redirector']));
1166             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1167             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1168             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1169             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1170             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1171             $conf->set('api.enabled', !empty($_POST['enableApi']));
1172             $conf->set('api.secret', escape($_POST['apiSecret']));
1173             $conf->set('translation.language', escape($_POST['language']));
1174
1175             try {
1176                 $conf->write(isLoggedIn());
1177                 $history->updateSettings();
1178                 invalidateCaches($conf->get('resource.page_cache'));
1179             }
1180             catch(Exception $e) {
1181                 error_log(
1182                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1183                     $e->getMessage()
1184                 );
1185
1186                 // TODO: do not handle exceptions/errors in JS.
1187                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1188                 exit;
1189             }
1190             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1191             exit;
1192         }
1193         else // Show the configuration form.
1194         {
1195             $PAGE->assign('title', $conf->get('general.title'));
1196             $PAGE->assign('theme', $conf->get('resource.theme'));
1197             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1198             $PAGE->assign('redirector', $conf->get('redirector.url'));
1199             list($continents, $cities) = generateTimeZoneData(
1200                 timezone_identifiers_list(),
1201                 $conf->get('general.timezone')
1202             );
1203             $PAGE->assign('continents', $continents);
1204             $PAGE->assign('cities', $cities);
1205             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1206             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1207             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1208             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1209             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1210             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1211             $PAGE->assign('api_secret', $conf->get('api.secret'));
1212             $PAGE->assign('languages', Languages::getAvailableLanguages());
1213             $PAGE->assign('language', $conf->get('translation.language'));
1214             $PAGE->renderPage('configure');
1215             exit;
1216         }
1217     }
1218
1219     // -------- User wants to rename a tag or delete it
1220     if ($targetPage == Router::$PAGE_CHANGETAG)
1221     {
1222         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1223             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1224             $PAGE->renderPage('changetag');
1225             exit;
1226         }
1227
1228         if (!tokenOk($_POST['token'])) {
1229             die(t('Wrong token.'));
1230         }
1231
1232         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1233         $LINKSDB->save($conf->get('resource.page_cache'));
1234         foreach ($alteredLinks as $link) {
1235             $history->updateLink($link);
1236         }
1237         $delete = empty($_POST['totag']);
1238         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1239         $count = count($alteredLinks);
1240         $alert = $delete
1241             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1242             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1243         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1244         exit;
1245     }
1246
1247     // -------- User wants to add a link without using the bookmarklet: Show form.
1248     if ($targetPage == Router::$PAGE_ADDLINK)
1249     {
1250         $PAGE->renderPage('addlink');
1251         exit;
1252     }
1253
1254     // -------- User clicked the "Save" button when editing a link: Save link to database.
1255     if (isset($_POST['save_edit']))
1256     {
1257         // Go away!
1258         if (! tokenOk($_POST['token'])) {
1259             die(t('Wrong token.'));
1260         }
1261
1262         // lf_id should only be present if the link exists.
1263         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1264         // Linkdate is kept here to:
1265         //   - use the same permalink for notes as they're displayed when creating them
1266         //   - let users hack creation date of their posts
1267         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1268         $linkdate = escape($_POST['lf_linkdate']);
1269         if (isset($LINKSDB[$id])) {
1270             // Edit
1271             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1272             $updated = new DateTime();
1273             $shortUrl = $LINKSDB[$id]['shorturl'];
1274             $new = false;
1275         } else {
1276             // New link
1277             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1278             $updated = null;
1279             $shortUrl = link_small_hash($created, $id);
1280             $new = true;
1281         }
1282
1283         // Remove multiple spaces.
1284         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1285         // Remove first '-' char in tags.
1286         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1287         // Remove duplicates.
1288         $tags = implode(' ', array_unique(explode(' ', $tags)));
1289
1290         if (empty(trim($_POST['lf_url']))) {
1291             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1292         }
1293         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1294
1295         $link = array(
1296             'id' => $id,
1297             'title' => trim($_POST['lf_title']),
1298             'url' => $url,
1299             'description' => $_POST['lf_description'],
1300             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1301             'created' => $created,
1302             'updated' => $updated,
1303             'tags' => str_replace(',', ' ', $tags),
1304             'shorturl' => $shortUrl,
1305         );
1306
1307         // If title is empty, use the URL as title.
1308         if ($link['title'] == '') {
1309             $link['title'] = $link['url'];
1310         }
1311
1312         $pluginManager->executeHooks('save_link', $link);
1313
1314         $LINKSDB[$id] = $link;
1315         $LINKSDB->save($conf->get('resource.page_cache'));
1316         if ($new) {
1317             $history->addLink($link);
1318         } else {
1319             $history->updateLink($link);
1320         }
1321
1322         // If we are called from the bookmarklet, we must close the popup:
1323         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1324             echo '<script>self.close();</script>';
1325             exit;
1326         }
1327
1328         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1329         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1330         // Scroll to the link which has been edited.
1331         $location .= '#' . $link['shorturl'];
1332         // After saving the link, redirect to the page the user was on.
1333         header('Location: '. $location);
1334         exit;
1335     }
1336
1337     // -------- User clicked the "Cancel" button when editing a link.
1338     if (isset($_POST['cancel_edit']))
1339     {
1340         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1341         if (! isset($LINKSDB[$id])) {
1342             header('Location: ?');
1343         }
1344         // If we are called from the bookmarklet, we must close the popup:
1345         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1346         $link = $LINKSDB[$id];
1347         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1348         // Scroll to the link which has been edited.
1349         $returnurl .= '#'. $link['shorturl'];
1350         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1351         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1352         exit;
1353     }
1354
1355     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1356     if ($targetPage == Router::$PAGE_DELETELINK)
1357     {
1358         if (! tokenOk($_GET['token'])) {
1359             die(t('Wrong token.'));
1360         }
1361
1362         $ids = trim($_GET['lf_linkdate']);
1363         if (strpos($ids, ' ') !== false) {
1364             // multiple, space-separated ids provided
1365             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1366         } else {
1367             // only a single id provided
1368             $ids = [$ids];
1369         }
1370         // assert at least one id is given
1371         if(!count($ids)){
1372             die('no id provided');
1373         }
1374         foreach ($ids as $id) {
1375             $id = (int) escape($id);
1376             $link = $LINKSDB[$id];
1377             $pluginManager->executeHooks('delete_link', $link);
1378             unset($LINKSDB[$id]);
1379         }
1380         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1381         $history->deleteLink($link);
1382
1383         // If we are called from the bookmarklet, we must close the popup:
1384         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1385
1386         $location = '?';
1387         if (isset($_SERVER['HTTP_REFERER'])) {
1388             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1389             $location = generateLocation(
1390                     $_SERVER['HTTP_REFERER'],
1391                     $_SERVER['HTTP_HOST'],
1392                     ['delete_link', 'edit_link', $link['shorturl']]
1393             );
1394         }
1395
1396         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1397         exit;
1398     }
1399
1400     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1401     if (isset($_GET['edit_link']))
1402     {
1403         $id = (int) escape($_GET['edit_link']);
1404         $link = $LINKSDB[$id];  // Read database
1405         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1406         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1407         $data = array(
1408             'link' => $link,
1409             'link_is_new' => false,
1410             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1411             'tags' => $LINKSDB->linksCountPerTag(),
1412         );
1413         $pluginManager->executeHooks('render_editlink', $data);
1414
1415         foreach ($data as $key => $value) {
1416             $PAGE->assign($key, $value);
1417         }
1418
1419         $PAGE->renderPage('editlink');
1420         exit;
1421     }
1422
1423     // -------- User want to post a new link: Display link edit form.
1424     if (isset($_GET['post'])) {
1425         $url = cleanup_url($_GET['post']);
1426
1427         $link_is_new = false;
1428         // Check if URL is not already in database (in this case, we will edit the existing link)
1429         $link = $LINKSDB->getLinkFromUrl($url);
1430         if (! $link)
1431         {
1432             $link_is_new = true;
1433             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1434             // Get title if it was provided in URL (by the bookmarklet).
1435             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1436             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1437             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1438             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1439             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1440             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1441             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1442                 // Short timeout to keep the application responsive
1443                 list($headers, $content) = get_http_response($url, 4);
1444                 if (strpos($headers[0], '200 OK') !== false) {
1445                     // Retrieve charset.
1446                     $charset = get_charset($headers, $content);
1447                     // Extract title.
1448                     $title = html_extract_title($content);
1449                     // Re-encode title in utf-8 if necessary.
1450                     if (! empty($title) && strtolower($charset) != 'utf-8') {
1451                         $title = mb_convert_encoding($title, 'utf-8', $charset);
1452                     }
1453                 }
1454             }
1455
1456             if ($url == '') {
1457                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1458                 $title = $conf->get('general.default_note_title', t('Note: '));
1459             }
1460             $url = escape($url);
1461             $title = escape($title);
1462
1463             $link = array(
1464                 'linkdate' => $linkdate,
1465                 'title' => $title,
1466                 'url' => $url,
1467                 'description' => $description,
1468                 'tags' => $tags,
1469                 'private' => $private,
1470             );
1471         } else {
1472             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1473         }
1474
1475         $data = array(
1476             'link' => $link,
1477             'link_is_new' => $link_is_new,
1478             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1479             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1480             'tags' => $LINKSDB->linksCountPerTag(),
1481             'default_private_links' => $conf->get('privacy.default_private_links', false),
1482         );
1483         $pluginManager->executeHooks('render_editlink', $data);
1484
1485         foreach ($data as $key => $value) {
1486             $PAGE->assign($key, $value);
1487         }
1488
1489         $PAGE->renderPage('editlink');
1490         exit;
1491     }
1492
1493     if ($targetPage == Router::$PAGE_EXPORT) {
1494         // Export links as a Netscape Bookmarks file
1495
1496         if (empty($_GET['selection'])) {
1497             $PAGE->renderPage('export');
1498             exit;
1499         }
1500
1501         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1502         $selection = $_GET['selection'];
1503         if (isset($_GET['prepend_note_url'])) {
1504             $prependNoteUrl = $_GET['prepend_note_url'];
1505         } else {
1506             $prependNoteUrl = false;
1507         }
1508
1509         try {
1510             $PAGE->assign(
1511                 'links',
1512                 NetscapeBookmarkUtils::filterAndFormat(
1513                     $LINKSDB,
1514                     $selection,
1515                     $prependNoteUrl,
1516                     index_url($_SERVER)
1517                 )
1518             );
1519         } catch (Exception $exc) {
1520             header('Content-Type: text/plain; charset=utf-8');
1521             echo $exc->getMessage();
1522             exit;
1523         }
1524         $now = new DateTime();
1525         header('Content-Type: text/html; charset=utf-8');
1526         header(
1527             'Content-disposition: attachment; filename=bookmarks_'
1528            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1529         );
1530         $PAGE->assign('date', $now->format(DateTime::RFC822));
1531         $PAGE->assign('eol', PHP_EOL);
1532         $PAGE->assign('selection', $selection);
1533         $PAGE->renderPage('export.bookmarks');
1534         exit;
1535     }
1536
1537     if ($targetPage == Router::$PAGE_IMPORT) {
1538         // Upload a Netscape bookmark dump to import its contents
1539
1540         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1541             // Show import dialog
1542             $PAGE->assign(
1543                 'maxfilesize',
1544                 get_max_upload_size(
1545                     ini_get('post_max_size'),
1546                     ini_get('upload_max_filesize'),
1547                     false
1548                 )
1549             );
1550             $PAGE->assign(
1551                 'maxfilesizeHuman',
1552                 get_max_upload_size(
1553                     ini_get('post_max_size'),
1554                     ini_get('upload_max_filesize'),
1555                     true
1556                 )
1557             );
1558             $PAGE->renderPage('import');
1559             exit;
1560         }
1561
1562         // Import bookmarks from an uploaded file
1563         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1564             // The file is too big or some form field may be missing.
1565             $msg = sprintf(
1566                 t(
1567                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1568                     .' (%s). Please upload in smaller chunks.'
1569                 ),
1570                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1571             );
1572             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1573             exit;
1574         }
1575         if (! tokenOk($_POST['token'])) {
1576             die('Wrong token.');
1577         }
1578         $status = NetscapeBookmarkUtils::import(
1579             $_POST,
1580             $_FILES,
1581             $LINKSDB,
1582             $conf,
1583             $history
1584         );
1585         echo '<script>alert("'.$status.'");document.location=\'?do='
1586              .Router::$PAGE_IMPORT .'\';</script>';
1587         exit;
1588     }
1589
1590     // Plugin administration page
1591     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1592         $pluginMeta = $pluginManager->getPluginsMeta();
1593
1594         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1595         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1596         // Load parameters.
1597         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1598         uasort(
1599             $enabledPlugins,
1600             function($a, $b) { return $a['order'] - $b['order']; }
1601         );
1602         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1603
1604         $PAGE->assign('enabledPlugins', $enabledPlugins);
1605         $PAGE->assign('disabledPlugins', $disabledPlugins);
1606         $PAGE->renderPage('pluginsadmin');
1607         exit;
1608     }
1609
1610     // Plugin administration form action
1611     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1612         try {
1613             if (isset($_POST['parameters_form'])) {
1614                 unset($_POST['parameters_form']);
1615                 foreach ($_POST as $param => $value) {
1616                     $conf->set('plugins.'. $param, escape($value));
1617                 }
1618             }
1619             else {
1620                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1621             }
1622             $conf->write(isLoggedIn());
1623             $history->updateSettings();
1624         }
1625         catch (Exception $e) {
1626             error_log(
1627                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1628                 $e->getMessage()
1629             );
1630
1631             // TODO: do not handle exceptions/errors in JS.
1632             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1633             exit;
1634         }
1635         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1636         exit;
1637     }
1638
1639     // Get a fresh token
1640     if ($targetPage == Router::$GET_TOKEN) {
1641         header('Content-Type:text/plain');
1642         echo getToken($conf);
1643         exit;
1644     }
1645
1646     // -------- Otherwise, simply display search form and links:
1647     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1648     exit;
1649 }
1650
1651 /**
1652  * Template for the list of links (<div id="linklist">)
1653  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1654  *
1655  * @param pageBuilder   $PAGE          pageBuilder instance.
1656  * @param LinkDB        $LINKSDB       LinkDB instance.
1657  * @param ConfigManager $conf          Configuration Manager instance.
1658  * @param PluginManager $pluginManager Plugin Manager instance.
1659  */
1660 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1661 {
1662     // Used in templates
1663     if (isset($_GET['searchtags'])) {
1664         if (! empty($_GET['searchtags'])) {
1665             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1666         } else {
1667             $searchtags = false;
1668         }
1669     } else {
1670         $searchtags = '';
1671     }
1672     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1673
1674     // Smallhash filter
1675     if (! empty($_SERVER['QUERY_STRING'])
1676         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1677         try {
1678             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1679         } catch (LinkNotFoundException $e) {
1680             $PAGE->render404($e->getMessage());
1681             exit;
1682         }
1683     } else {
1684         // Filter links according search parameters.
1685         $visibility = ! empty($_SESSION['privateonly']) ? 'private' : 'all';
1686         $request = [
1687             'searchtags' => $searchtags,
1688             'searchterm' => $searchterm,
1689         ];
1690         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1691     }
1692
1693     // ---- Handle paging.
1694     $keys = array();
1695     foreach ($linksToDisplay as $key => $value) {
1696         $keys[] = $key;
1697     }
1698
1699
1700
1701     // Select articles according to paging.
1702     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1703     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1704     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1705     $page = $page < 1 ? 1 : $page;
1706     $page = $page > $pagecount ? $pagecount : $page;
1707     // Start index.
1708     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1709     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1710     $linkDisp = array();
1711     while ($i<$end && $i<count($keys))
1712     {
1713         $link = $linksToDisplay[$keys[$i]];
1714         $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1715         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1716         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1717         $link['timestamp'] = $link['created']->getTimestamp();
1718         if (! empty($link['updated'])) {
1719             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1720         } else {
1721             $link['updated_timestamp'] = '';
1722         }
1723         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1724         uasort($taglist, 'strcasecmp');
1725         $link['taglist'] = $taglist;
1726         // Check for both signs of a note: starting with ? and 7 chars long.
1727         if ($link['url'][0] === '?' &&
1728             strlen($link['url']) === 7) {
1729             $link['url'] = index_url($_SERVER) . $link['url'];
1730         }
1731
1732         $linkDisp[$keys[$i]] = $link;
1733         $i++;
1734     }
1735
1736     // Compute paging navigation
1737     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1738     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1739     $previous_page_url = '';
1740     if ($i != count($keys)) {
1741         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1742     }
1743     $next_page_url='';
1744     if ($page>1) {
1745         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1746     }
1747
1748     // Fill all template fields.
1749     $data = array(
1750         'previous_page_url' => $previous_page_url,
1751         'next_page_url' => $next_page_url,
1752         'page_current' => $page,
1753         'page_max' => $pagecount,
1754         'result_count' => count($linksToDisplay),
1755         'search_term' => $searchterm,
1756         'search_tags' => $searchtags,
1757         'visibility' => ! empty($_SESSION['privateonly']) ? 'private' : '',
1758         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1759         'links' => $linkDisp,
1760     );
1761
1762     // If there is only a single link, we change on-the-fly the title of the page.
1763     if (count($linksToDisplay) == 1) {
1764         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1765     }
1766
1767     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1768
1769     foreach ($data as $key => $value) {
1770         $PAGE->assign($key, $value);
1771     }
1772
1773     return;
1774 }
1775
1776 /**
1777  * Compute the thumbnail for a link.
1778  *
1779  * With a link to the original URL.
1780  * Understands various services (youtube.com...)
1781  * Input: $url = URL for which the thumbnail must be found.
1782  *        $href = if provided, this URL will be followed instead of $url
1783  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1784  * Some of them may be missing.
1785  * Return an empty array if no thumbnail available.
1786  *
1787  * @param ConfigManager $conf Configuration Manager instance.
1788  * @param string        $url
1789  * @param string|bool   $href
1790  *
1791  * @return array
1792  */
1793 function computeThumbnail($conf, $url, $href = false)
1794 {
1795     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1796     if ($href==false) $href=$url;
1797
1798     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1799     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1800     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1801     $domain = parse_url($url,PHP_URL_HOST);
1802     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1803     {
1804         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1805         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1806                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1807     }
1808     if ($domain=='youtu.be') // Youtube short links
1809     {
1810         $path = parse_url($url,PHP_URL_PATH);
1811         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1812                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1813     }
1814     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1815     {
1816         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1817         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1818                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1819     }
1820
1821     if ($domain=='imgur.com')
1822     {
1823         $path = parse_url($url,PHP_URL_PATH);
1824         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1825         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1826                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1827         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1828                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1829
1830         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1831                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1832     }
1833     if ($domain=='i.imgur.com')
1834     {
1835         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1836         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1837                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1838     }
1839     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1840     {
1841         if (strpos($url,'dailymotion.com/video/')!==false)
1842         {
1843             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1844             return array('src'=>$thumburl,
1845                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1846         }
1847     }
1848     if (endsWith($domain,'.imageshack.us'))
1849     {
1850         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1851         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1852         {
1853             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1854             return array('src'=>$thumburl,
1855                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1856         }
1857     }
1858
1859     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1860     // So we deport the thumbnail generation in order not to slow down page generation
1861     // (and we also cache the thumbnail)
1862
1863     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1864
1865     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1866         || $domain=='vimeo.com'
1867         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1868         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1869     )
1870     {
1871         if ($domain=='vimeo.com')
1872         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1873             $path = parse_url($url,PHP_URL_PATH);
1874             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1875         }
1876         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1877         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1878             $path = parse_url($url,PHP_URL_PATH);
1879             if (!preg_match('!/\d+.+?!',$path)) return array();
1880         }
1881         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1882         {   // Make sure this TED URL points to a video (/talks/...)
1883             $path = parse_url($url,PHP_URL_PATH);
1884             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1885         }
1886         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1887         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1888                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1889     }
1890
1891     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1892     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1893     // But using the extension will do.
1894     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1895     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1896     {
1897         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1898         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1899                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1900     }
1901     return array(); // No thumbnail.
1902
1903 }
1904
1905
1906 // Returns the HTML code to display a thumbnail for a link
1907 // with a link to the original URL.
1908 // Understands various services (youtube.com...)
1909 // Input: $url = URL for which the thumbnail must be found.
1910 //        $href = if provided, this URL will be followed instead of $url
1911 // Returns '' if no thumbnail available.
1912 function thumbnail($url,$href=false)
1913 {
1914     // FIXME!
1915     global $conf;
1916     $t = computeThumbnail($conf, $url,$href);
1917     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1918
1919     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1920     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1921     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1922     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1923     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1924     $html.='></a>';
1925     return $html;
1926 }
1927
1928 // Returns the HTML code to display a thumbnail for a link
1929 // for the picture wall (using lazy image loading)
1930 // Understands various services (youtube.com...)
1931 // Input: $url = URL for which the thumbnail must be found.
1932 //        $href = if provided, this URL will be followed instead of $url
1933 // Returns '' if no thumbnail available.
1934 function lazyThumbnail($conf, $url,$href=false)
1935 {
1936     // FIXME!
1937     global $conf;
1938     $t = computeThumbnail($conf, $url,$href);
1939     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1940
1941     $html='<a href="'.escape($t['href']).'">';
1942
1943     // Lazy image
1944     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1945
1946     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1947     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1948     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1949     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1950     $html.='>';
1951
1952     // No-JavaScript fallback.
1953     $html.='<noscript><img src="'.escape($t['src']).'"';
1954     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1955     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1956     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1957     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1958     $html.='></noscript></a>';
1959
1960     return $html;
1961 }
1962
1963
1964 /**
1965  * Installation
1966  * This function should NEVER be called if the file data/config.php exists.
1967  *
1968  * @param ConfigManager $conf Configuration Manager instance.
1969  */
1970 function install($conf)
1971 {
1972     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1973     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1974
1975
1976     // This part makes sure sessions works correctly.
1977     // (Because on some hosts, session.save_path may not be set correctly,
1978     // or we may not have write access to it.)
1979     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1980     {
1981         // Step 2: Check if data in session is correct.
1982         $msg = t(
1983             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1984             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1985             'and that you have write access to it.<br>'.
1986             'It currently points to %s.<br>'.
1987             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1988             'or any custom hostname without a dot causes cookie storage to fail. '.
1989             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1990         );
1991         $msg = sprintf($msg, session_save_path());
1992         echo $msg;
1993         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1994         die;
1995     }
1996     if (!isset($_SESSION['session_tested']))
1997     {   // Step 1 : Try to store data in session and reload page.
1998         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
1999         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
2000     }
2001     if (isset($_GET['test_session']))
2002     {   // Step 3: Sessions are OK. Remove test parameter from URL.
2003         header('Location: '.index_url($_SERVER));
2004     }
2005
2006
2007     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2008     {
2009         $tz = 'UTC';
2010         if (!empty($_POST['continent']) && !empty($_POST['city'])
2011             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2012         ) {
2013             $tz = $_POST['continent'].'/'.$_POST['city'];
2014         }
2015         $conf->set('general.timezone', $tz);
2016         $login = $_POST['setlogin'];
2017         $conf->set('credentials.login', $login);
2018         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2019         $conf->set('credentials.salt', $salt);
2020         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2021         if (!empty($_POST['title'])) {
2022             $conf->set('general.title', escape($_POST['title']));
2023         } else {
2024             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2025         }
2026         $conf->set('translation.language', escape($_POST['language']));
2027         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2028         $conf->set('api.enabled', !empty($_POST['enableApi']));
2029         $conf->set(
2030             'api.secret',
2031             generate_api_secret(
2032                 $conf->get('credentials.login'),
2033                 $conf->get('credentials.salt')
2034             )
2035         );
2036         try {
2037             // Everything is ok, let's create config file.
2038             $conf->write(isLoggedIn());
2039         }
2040         catch(Exception $e) {
2041             error_log(
2042                     'ERROR while writing config file after installation.' . PHP_EOL .
2043                     $e->getMessage()
2044                 );
2045
2046             // TODO: do not handle exceptions/errors in JS.
2047             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2048             exit;
2049         }
2050         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2051         exit;
2052     }
2053
2054     $PAGE = new PageBuilder($conf);
2055     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2056     $PAGE->assign('continents', $continents);
2057     $PAGE->assign('cities', $cities);
2058     $PAGE->assign('languages', Languages::getAvailableLanguages());
2059     $PAGE->renderPage('install');
2060     exit;
2061 }
2062
2063 /**
2064  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2065  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2066  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2067  * This function is called by passing the URL:
2068  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2069  * [URL] is the URL of the link (e.g. a flickr page)
2070  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2071  * The function below will fetch the image from the webservice and store it in the cache.
2072  *
2073  * @param ConfigManager $conf Configuration Manager instance,
2074  */
2075 function genThumbnail($conf)
2076 {
2077     // Make sure the parameters in the URL were generated by us.
2078     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2079     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2080
2081     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2082     // Let's see if we don't already have the image for this URL in the cache.
2083     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2084     if (is_file($cacheDir .'/'. $thumbname))
2085     {   // We have the thumbnail, just serve it:
2086         header('Content-Type: image/jpeg');
2087         echo file_get_contents($cacheDir .'/'. $thumbname);
2088         return;
2089     }
2090     // We may also serve a blank image (if service did not respond)
2091     $blankname=hash('sha1',$_GET['url']).'.gif';
2092     if (is_file($cacheDir .'/'. $blankname))
2093     {
2094         header('Content-Type: image/gif');
2095         echo file_get_contents($cacheDir .'/'. $blankname);
2096         return;
2097     }
2098
2099     // Otherwise, generate the thumbnail.
2100     $url = $_GET['url'];
2101     $domain = parse_url($url,PHP_URL_HOST);
2102
2103     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2104     {
2105         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2106         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2107
2108         // Is this a link to an image, or to a flickr page ?
2109         $imageurl='';
2110         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2111         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2112             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2113             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2114         }
2115         else // This is a flickr page (html)
2116         {
2117             // Get the flickr html page.
2118             list($headers, $content) = get_http_response($url, 20);
2119             if (strpos($headers[0], '200 OK') !== false)
2120             {
2121                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2122                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2123                 if (!empty($matches[1])) $imageurl=$matches[1];
2124
2125                 // In albums (and some other pages), the link rel="image_src" is not provided,
2126                 // but flickr provides:
2127                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2128                 if ($imageurl=='')
2129                 {
2130                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2131                     if (!empty($matches[1])) $imageurl=$matches[1];
2132                 }
2133             }
2134         }
2135
2136         if ($imageurl!='')
2137         {   // Let's download the image.
2138             // Image is 240x120, so 10 seconds to download should be enough.
2139             list($headers, $content) = get_http_response($imageurl, 10);
2140             if (strpos($headers[0], '200 OK') !== false) {
2141                 // Save image to cache.
2142                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2143                 header('Content-Type: image/jpeg');
2144                 echo $content;
2145                 return;
2146             }
2147         }
2148     }
2149
2150     elseif ($domain=='vimeo.com' )
2151     {
2152         // This is more complex: we have to perform a HTTP request, then parse the result.
2153         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2154         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2155         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2156         if (strpos($headers[0], '200 OK') !== false) {
2157             $t = unserialize($content);
2158             $imageurl = $t[0]['thumbnail_medium'];
2159             // Then we download the image and serve it to our client.
2160             list($headers, $content) = get_http_response($imageurl, 10);
2161             if (strpos($headers[0], '200 OK') !== false) {
2162                 // Save image to cache.
2163                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2164                 header('Content-Type: image/jpeg');
2165                 echo $content;
2166                 return;
2167             }
2168         }
2169     }
2170
2171     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2172     {
2173         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2174         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2175         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2176         list($headers, $content) = get_http_response($url, 5);
2177         if (strpos($headers[0], '200 OK') !== false) {
2178             // Extract the link to the thumbnail
2179             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2180             if (!empty($matches[1]))
2181             {   // Let's download the image.
2182                 $imageurl=$matches[1];
2183                 // No control on image size, so wait long enough
2184                 list($headers, $content) = get_http_response($imageurl, 20);
2185                 if (strpos($headers[0], '200 OK') !== false) {
2186                     $filepath = $cacheDir .'/'. $thumbname;
2187                     file_put_contents($filepath, $content); // Save image to cache.
2188                     if (resizeImage($filepath))
2189                     {
2190                         header('Content-Type: image/jpeg');
2191                         echo file_get_contents($filepath);
2192                         return;
2193                     }
2194                 }
2195             }
2196         }
2197     }
2198
2199     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2200     {
2201         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2202         // http://xkcd.com/327/
2203         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2204         list($headers, $content) = get_http_response($url, 5);
2205         if (strpos($headers[0], '200 OK') !== false) {
2206             // Extract the link to the thumbnail
2207             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2208             if (!empty($matches[1]))
2209             {   // Let's download the image.
2210                 $imageurl=$matches[1];
2211                 // No control on image size, so wait long enough
2212                 list($headers, $content) = get_http_response($imageurl, 20);
2213                 if (strpos($headers[0], '200 OK') !== false) {
2214                     $filepath = $cacheDir.'/'.$thumbname;
2215                     // Save image to cache.
2216                     file_put_contents($filepath, $content);
2217                     if (resizeImage($filepath))
2218                     {
2219                         header('Content-Type: image/jpeg');
2220                         echo file_get_contents($filepath);
2221                         return;
2222                     }
2223                 }
2224             }
2225         }
2226     }
2227
2228     else
2229     {
2230         // For all other domains, we try to download the image and make a thumbnail.
2231         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2232         list($headers, $content) = get_http_response($url, 30);
2233         if (strpos($headers[0], '200 OK') !== false) {
2234             $filepath = $cacheDir .'/'.$thumbname;
2235             // Save image to cache.
2236             file_put_contents($filepath, $content);
2237             if (resizeImage($filepath))
2238             {
2239                 header('Content-Type: image/jpeg');
2240                 echo file_get_contents($filepath);
2241                 return;
2242             }
2243         }
2244     }
2245
2246
2247     // Otherwise, return an empty image (8x8 transparent gif)
2248     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2249     // Also put something in cache so that this URL is not requested twice.
2250     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2251     header('Content-Type: image/gif');
2252     echo $blankgif;
2253 }
2254
2255 // Make a thumbnail of the image (to width: 120 pixels)
2256 // Returns true if success, false otherwise.
2257 function resizeImage($filepath)
2258 {
2259     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2260
2261     // Trick: some stupid people rename GIF as JPEG... or else.
2262     // So we really try to open each image type whatever the extension is.
2263     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2264     $im=false;
2265     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2266     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2267     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2268     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2269     $w = imagesx($im);
2270     $h = imagesy($im);
2271     $ystart = 0; $yheight=$h;
2272     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2273     $nw = 120;   // Desired width
2274     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2275     // Resize image:
2276     $im2 = imagecreatetruecolor($nw,$nh);
2277     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2278     imageinterlace($im2,true); // For progressive JPEG.
2279     $tempname=$filepath.'_TEMP.jpg';
2280     imagejpeg($im2, $tempname, 90);
2281     imagedestroy($im);
2282     imagedestroy($im2);
2283     unlink($filepath);
2284     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2285     return true;
2286 }
2287
2288 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2289 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2290 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2291     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2292 }
2293
2294 try {
2295     $history = new History($conf->get('resource.history'));
2296 } catch(Exception $e) {
2297     die($e->getMessage());
2298 }
2299
2300 $linkDb = new LinkDB(
2301     $conf->get('resource.datastore'),
2302     isLoggedIn(),
2303     $conf->get('privacy.hide_public_links'),
2304     $conf->get('redirector.url'),
2305     $conf->get('redirector.encode_url')
2306 );
2307
2308 $container = new \Slim\Container();
2309 $container['conf'] = $conf;
2310 $container['plugins'] = $pluginManager;
2311 $container['history'] = $history;
2312 $app = new \Slim\App($container);
2313
2314 // REST API routes
2315 $app->group('/api/v1', function() {
2316     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2317     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2318     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2319     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2320     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2321     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2322     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2323 })->add('\Shaarli\Api\ApiMiddleware');
2324
2325 $response = $app->run(true);
2326 // Hack to make Slim and Shaarli router work together:
2327 // If a Slim route isn't found and NOT API call, we call renderPage().
2328 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2329     // We use UTF-8 for proper international characters handling.
2330     header('Content-Type: text/html; charset=utf-8');
2331     renderPage($conf, $pluginManager, $linkDb, $history);
2332 } else {
2333     $app->respond($response);
2334 }