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 use \Shaarli\SessionManager;
  82
  83 // Ensure the PHP version is supported
  84 try {
  85     ApplicationUtils::checkPHPVersion('5.5', PHP_VERSION);
  86 } catch(Exception $exc) {
  87     header('Content-Type: text/plain; charset=utf-8');
  88     echo $exc->getMessage();
  89     exit;
  90 }
  91
  92 define('SHAARLI_VERSION', ApplicationUtils::getVersion(__DIR__ .'/'. ApplicationUtils::$VERSION_FILE));
  93
  94 // Force cookie path (but do not change lifetime)
  95 $cookie = session_get_cookie_params();
  96 $cookiedir = '';
  97 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
  98     $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
  99 }
 100 // Set default cookie expiration and path.
 101 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
 102 // Set session parameters on server side.
 103 // If the user does not access any page within this time, his/her session is considered expired.
 104 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
 105 // Use cookies to store session.
 106 ini_set('session.use_cookies', 1);
 107 // Force cookies for session (phpsessionID forbidden in URL).
 108 ini_set('session.use_only_cookies', 1);
 109 // Prevent PHP form using sessionID in URL if cookies are disabled.
 110 ini_set('session.use_trans_sid', false);
 111
 112 session_name('shaarli');
 113 // Start session if needed (Some server auto-start sessions).
 114 if (session_id() == '') {
 115     session_start();
 116 }
 117
 118 // Regenerate session ID if invalid or not defined in cookie.
 119 if (isset($_COOKIE['shaarli']) && !SessionManager::checkId($_COOKIE['shaarli'])) {
 120     session_regenerate_id(true);
 121     $_COOKIE['shaarli'] = session_id();
 122 }
 123
 124 $conf = new ConfigManager();
 125 $sessionManager = new SessionManager($_SESSION, $conf);
 126
 127 // LC_MESSAGES isn't defined without php-intl, in this case use LC_COLLATE locale instead.
 128 if (! defined('LC_MESSAGES')) {
 129     define('LC_MESSAGES', LC_COLLATE);
 130 }
 131
 132 // Sniff browser language and set date format accordingly.
 133 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
 134     autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
 135 }
 136
 137 new Languages(setlocale(LC_MESSAGES, 0), $conf);
 138
 139 $conf->setEmpty('general.timezone', date_default_timezone_get());
 140 $conf->setEmpty('general.title', t('Shared links on '). escape(index_url($_SERVER)));
 141 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl').'/'.$conf->get('resource.theme').'/'; // template directory
 142 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
 143
 144 $pluginManager = new PluginManager($conf);
 145 $pluginManager->load($conf->get('general.enabled_plugins'));
 146
 147 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
 148
 149 ob_start();  // Output buffering for the page cache.
 150
 151 // Prevent caching on client side or proxy: (yes, it's ugly)
 152 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 153 header("Cache-Control: no-store, no-cache, must-revalidate");
 154 header("Cache-Control: post-check=0, pre-check=0", false);
 155 header("Pragma: no-cache");
 156
 157 if (! is_file($conf->getConfigFileExt())) {
 158     // Ensure Shaarli has proper access to its resources
 159     $errors = ApplicationUtils::checkResourcePermissions($conf);
 160
 161     if ($errors != array()) {
 162         $message = '<p>'. t('Insufficient permissions:') .'</p><ul>';
 163
 164         foreach ($errors as $error) {
 165             $message .= '<li>'.$error.'</li>';
 166         }
 167         $message .= '</ul>';
 168
 169         header('Content-Type: text/html; charset=utf-8');
 170         echo $message;
 171         exit;
 172     }
 173
 174     // Display the installation form if no existing config is found
 175     install($conf, $sessionManager);
 176 }
 177
 178 // a token depending of deployment salt, user password, and the current ip
 179 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
 180
 181 /**
 182  * Checking session state (i.e. is the user still logged in)
 183  *
 184  * @param ConfigManager $conf The configuration manager.
 185  *
 186  * @return bool: true if the user is logged in, false otherwise.
 187  */
 188 function setup_login_state($conf)
 189 {
 190     if ($conf->get('security.open_shaarli')) {
 191         return true;
 192     }
 193     $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
 194     $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
 195     if (! $conf->exists('credentials.login')) {
 196         $userIsLoggedIn = false;  // Shaarli is not configured yet.
 197         $loginFailure = true;
 198     }
 199     if (isset($_COOKIE['shaarli_staySignedIn']) &&
 200         $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
 201         !$loginFailure)
 202     {
 203         fillSessionInfo($conf);
 204         $userIsLoggedIn = true;
 205     }
 206     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 207     if (empty($_SESSION['uid'])
 208         || ($conf->get('security.session_protection_disabled') === false && $_SESSION['ip'] != allIPs())
 209         || time() >= $_SESSION['expires_on'])
 210     {
 211         logout();
 212         $userIsLoggedIn = false;
 213         $loginFailure = true;
 214     }
 215     if (!empty($_SESSION['longlastingsession'])) {
 216         $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
 217     }
 218     else {
 219         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
 220     }
 221     if (!$loginFailure) {
 222         $userIsLoggedIn = true;
 223     }
 224
 225     return $userIsLoggedIn;
 226 }
 227 $userIsLoggedIn = setup_login_state($conf);
 228
 229 // ------------------------------------------------------------------------------------------
 230 // Session management
 231
 232 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
 233 function allIPs()
 234 {
 235     $ip = $_SERVER['REMOTE_ADDR'];
 236     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 237     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 238     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 239     return $ip;
 240 }
 241
 242 /**
 243  * Load user session.
 244  *
 245  * @param ConfigManager $conf Configuration Manager instance.
 246  */
 247 function fillSessionInfo($conf)
 248 {
 249     $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
 250     $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 251     $_SESSION['username']= $conf->get('credentials.login');
 252     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 253 }
 254
 255 /**
 256  * Check that user/password is correct.
 257  *
 258  * @param string        $login    Username
 259  * @param string        $password User password
 260  * @param ConfigManager $conf     Configuration Manager instance.
 261  *
 262  * @return bool: authentication successful or not.
 263  */
 264 function check_auth($login, $password, $conf)
 265 {
 266     $hash = sha1($password . $login . $conf->get('credentials.salt'));
 267     if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
 268     {   // Login/password is correct.
 269         fillSessionInfo($conf);
 270         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
 271         return true;
 272     }
 273     logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
 274     return false;
 275 }
 276
 277 // Returns true if the user is logged in.
 278 function isLoggedIn()
 279 {
 280     global $userIsLoggedIn;
 281     return $userIsLoggedIn;
 282 }
 283
 284 // Force logout.
 285 function logout() {
 286     if (isset($_SESSION)) {
 287         unset($_SESSION['uid']);
 288         unset($_SESSION['ip']);
 289         unset($_SESSION['username']);
 290         unset($_SESSION['visibility']);
 291         unset($_SESSION['untaggedonly']);
 292     }
 293     setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
 294 }
 295
 296
 297 // ------------------------------------------------------------------------------------------
 298 // Brute force protection system
 299 // Several consecutive failed logins will ban the IP address for 30 minutes.
 300 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
 301     // FIXME! globals
 302     file_put_contents(
 303         $conf->get('resource.ban_file', 'data/ipbans.php'),
 304         "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
 305     );
 306 }
 307 include $conf->get('resource.ban_file', 'data/ipbans.php');
 308 /**
 309  * Signal a failed login. Will ban the IP if too many failures:
 310  *
 311  * @param ConfigManager $conf Configuration Manager instance.
 312  */
 313 function ban_loginFailed($conf)
 314 {
 315     $ip = $_SERVER['REMOTE_ADDR'];
 316     $trusted = $conf->get('security.trusted_proxies', array());
 317     if (in_array($ip, $trusted)) {
 318         $ip = getIpAddressFromProxy($_SERVER, $trusted);
 319         if (!$ip) {
 320             return;
 321         }
 322     }
 323     $gb = $GLOBALS['IPBANS'];
 324     if (! isset($gb['FAILURES'][$ip])) {
 325         $gb['FAILURES'][$ip]=0;
 326     }
 327     $gb['FAILURES'][$ip]++;
 328     if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
 329     {
 330         $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
 331         logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
 332     }
 333     $GLOBALS['IPBANS'] = $gb;
 334     file_put_contents(
 335         $conf->get('resource.ban_file', 'data/ipbans.php'),
 336         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 337     );
 338 }
 339
 340 /**
 341  * Signals a successful login. Resets failed login counter.
 342  *
 343  * @param ConfigManager $conf Configuration Manager instance.
 344  */
 345 function ban_loginOk($conf)
 346 {
 347     $ip = $_SERVER['REMOTE_ADDR'];
 348     $gb = $GLOBALS['IPBANS'];
 349     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 350     $GLOBALS['IPBANS'] = $gb;
 351     file_put_contents(
 352         $conf->get('resource.ban_file', 'data/ipbans.php'),
 353         "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 354     );
 355 }
 356
 357 /**
 358  * Checks if the user CAN login. If 'true', the user can try to login.
 359  *
 360  * @param ConfigManager $conf Configuration Manager instance.
 361  *
 362  * @return bool: true if the user is allowed to login.
 363  */
 364 function ban_canLogin($conf)
 365 {
 366     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 367     if (isset($gb['BANS'][$ip]))
 368     {
 369         // User is banned. Check if the ban has expired:
 370         if ($gb['BANS'][$ip]<=time())
 371         {   // Ban expired, user can try to login again.
 372             logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
 373             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 374             file_put_contents(
 375                 $conf->get('resource.ban_file', 'data/ipbans.php'),
 376                 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
 377             );
 378             return true; // Ban has expired, user can login.
 379         }
 380         return false; // User is banned.
 381     }
 382     return true; // User is not banned.
 383 }
 384
 385 // ------------------------------------------------------------------------------------------
 386 // Process login form: Check if login/password is correct.
 387 if (isset($_POST['login']))
 388 {
 389     if (!ban_canLogin($conf)) die(t('I said: NO. You are banned for the moment. Go away.'));
 390     if (isset($_POST['password'])
 391         && $sessionManager->checkToken($_POST['token'])
 392         && (check_auth($_POST['login'], $_POST['password'], $conf))
 393     ) {   // Login/password is OK.
 394         ban_loginOk($conf);
 395         // If user wants to keep the session cookie even after the browser closes:
 396         if (!empty($_POST['longlastingsession']))
 397         {
 398             $_SESSION['longlastingsession'] = 31536000; // (31536000 seconds = 1 year)
 399             $expiration = time() + $_SESSION['longlastingsession']; // calculate relative cookie expiration (1 year from now)
 400             setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, $expiration, WEB_PATH);
 401             $_SESSION['expires_on'] = $expiration;  // Set session expiration on server-side.
 402
 403             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 404             session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
 405             // Note: Never forget the trailing slash on the cookie path!
 406             session_regenerate_id(true);  // Send cookie with new expiration date to browser.
 407         }
 408         else // Standard session expiration (=when browser closes)
 409         {
 410             $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
 411             session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
 412             session_regenerate_id(true);
 413         }
 414
 415         // Optional redirect after login:
 416         if (isset($_GET['post'])) {
 417             $uri = '?post='. urlencode($_GET['post']);
 418             foreach (array('description', 'source', 'title', 'tags') as $param) {
 419                 if (!empty($_GET[$param])) {
 420                     $uri .= '&'.$param.'='.urlencode($_GET[$param]);
 421                 }
 422             }
 423             header('Location: '. $uri);
 424             exit;
 425         }
 426
 427         if (isset($_GET['edit_link'])) {
 428             header('Location: ?edit_link='. escape($_GET['edit_link']));
 429             exit;
 430         }
 431
 432         if (isset($_POST['returnurl'])) {
 433             // Prevent loops over login screen.
 434             if (strpos($_POST['returnurl'], 'do=login') === false) {
 435                 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
 436                 exit;
 437             }
 438         }
 439         header('Location: ?'); exit;
 440     }
 441     else
 442     {
 443         ban_loginFailed($conf);
 444         $redir = '&username='. urlencode($_POST['login']);
 445         if (isset($_GET['post'])) {
 446             $redir .= '&post=' . urlencode($_GET['post']);
 447             foreach (array('description', 'source', 'title', 'tags') as $param) {
 448                 if (!empty($_GET[$param])) {
 449                     $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
 450                 }
 451             }
 452         }
 453         // Redirect to login screen.
 454         echo '<script>alert("'. t("Wrong login/password.") .'");document.location=\'?do=login'.$redir.'\';</script>';
 455         exit;
 456     }
 457 }
 458
 459 // ------------------------------------------------------------------------------------------
 460 // Token management for XSRF protection
 461 // Token should be used in any form which acts on data (create,update,delete,import...).
 462 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 463
 464 /**
 465  * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
 466  * Gives the last 7 days (which have links).
 467  * This RSS feed cannot be filtered.
 468  *
 469  * @param ConfigManager $conf Configuration Manager instance.
 470  */
 471 function showDailyRSS($conf) {
 472     // Cache system
 473     $query = $_SERVER['QUERY_STRING'];
 474     $cache = new CachedPage(
 475         $conf->get('config.PAGE_CACHE'),
 476         page_url($_SERVER),
 477         startsWith($query,'do=dailyrss') && !isLoggedIn()
 478     );
 479     $cached = $cache->cachedVersion();
 480     if (!empty($cached)) {
 481         echo $cached;
 482         exit;
 483     }
 484
 485     // If cached was not found (or not usable), then read the database and build the response:
 486     // Read links from database (and filter private links if used it not logged in).
 487     $LINKSDB = new LinkDB(
 488         $conf->get('resource.datastore'),
 489         isLoggedIn(),
 490         $conf->get('privacy.hide_public_links'),
 491         $conf->get('redirector.url'),
 492         $conf->get('redirector.encode_url')
 493     );
 494
 495     /* Some Shaarlies may have very few links, so we need to look
 496        back in time until we have enough days ($nb_of_days).
 497     */
 498     $nb_of_days = 7; // We take 7 days.
 499     $today = date('Ymd');
 500     $days = array();
 501
 502     foreach ($LINKSDB as $link) {
 503         $day = $link['created']->format('Ymd'); // Extract day (without time)
 504         if (strcmp($day, $today) < 0) {
 505             if (empty($days[$day])) {
 506                 $days[$day] = array();
 507             }
 508             $days[$day][] = $link;
 509         }
 510
 511         if (count($days) > $nb_of_days) {
 512             break; // Have we collected enough days?
 513         }
 514     }
 515
 516     // Build the RSS feed.
 517     header('Content-Type: application/rss+xml; charset=utf-8');
 518     $pageaddr = escape(index_url($_SERVER));
 519     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
 520     echo '<channel>';
 521     echo '<title>Daily - '. $conf->get('general.title') . '</title>';
 522     echo '<link>'. $pageaddr .'</link>';
 523     echo '<description>Daily shared links</description>';
 524     echo '<language>en-en</language>';
 525     echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
 526
 527     // For each day.
 528     foreach ($days as $day => $links) {
 529         $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 530         $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day);  // Absolute URL of the corresponding "Daily" page.
 531
 532         // We pre-format some fields for proper output.
 533         foreach ($links as &$link) {
 534             $link['formatedDescription'] = format_description(
 535                 $link['description'],
 536                 $conf->get('redirector.url'),
 537                 $conf->get('redirector.encode_url')
 538             );
 539             $link['thumbnail'] = thumbnail($conf, $link['url']);
 540             $link['timestamp'] = $link['created']->getTimestamp();
 541             if (startsWith($link['url'], '?')) {
 542                 $link['url'] = index_url($_SERVER) . $link['url'];  // make permalink URL absolute
 543             }
 544         }
 545
 546         // Then build the HTML for this day:
 547         $tpl = new RainTPL;
 548         $tpl->assign('title', $conf->get('general.title'));
 549         $tpl->assign('daydate', $dayDate->getTimestamp());
 550         $tpl->assign('absurl', $absurl);
 551         $tpl->assign('links', $links);
 552         $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
 553         $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
 554         $html = $tpl->draw('dailyrss', true);
 555
 556         echo $html . PHP_EOL;
 557     }
 558     echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
 559
 560     $cache->cache(ob_get_contents());
 561     ob_end_flush();
 562     exit;
 563 }
 564
 565 /**
 566  * Show the 'Daily' page.
 567  *
 568  * @param PageBuilder   $pageBuilder   Template engine wrapper.
 569  * @param LinkDB        $LINKSDB       LinkDB instance.
 570  * @param ConfigManager $conf          Configuration Manager instance.
 571  * @param PluginManager $pluginManager Plugin Manager instane.
 572  */
 573 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
 574 {
 575     $day = date('Ymd', strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
 576     if (isset($_GET['day'])) {
 577       $day = $_GET['day'];
 578     }
 579
 580     $days = $LINKSDB->days();
 581     $i = array_search($day, $days);
 582     if ($i === false && count($days)) {
 583         // no links for day, but at least one day with links
 584         $i = count($days) - 1;
 585         $day = $days[$i];
 586     }
 587     $previousday = '';
 588     $nextday = '';
 589
 590     if ($i !== false) {
 591         if ($i >= 1) {
 592              $previousday=$days[$i - 1];
 593         }
 594         if ($i < count($days) - 1) {
 595           $nextday = $days[$i + 1];
 596         }
 597     }
 598     try {
 599         $linksToDisplay = $LINKSDB->filterDay($day);
 600     } catch (Exception $exc) {
 601         error_log($exc);
 602         $linksToDisplay = array();
 603     }
 604
 605     // We pre-format some fields for proper output.
 606     foreach($linksToDisplay as $key => $link) {
 607         $taglist = explode(' ',$link['tags']);
 608         uasort($taglist, 'strcasecmp');
 609         $linksToDisplay[$key]['taglist']=$taglist;
 610         $linksToDisplay[$key]['formatedDescription'] = format_description(
 611             $link['description'],
 612             $conf->get('redirector.url'),
 613             $conf->get('redirector.encode_url')
 614         );
 615         $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
 616         $linksToDisplay[$key]['timestamp'] =  $link['created']->getTimestamp();
 617     }
 618
 619     $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
 620     $data = array(
 621         'pagetitle' => $conf->get('general.title') .' - '. format_date($dayDate, false),
 622         'linksToDisplay' => $linksToDisplay,
 623         'day' => $dayDate->getTimestamp(),
 624         'dayDate' => $dayDate,
 625         'previousday' => $previousday,
 626         'nextday' => $nextday,
 627     );
 628
 629     /* Hook is called before column construction so that plugins don't have
 630        to deal with columns. */
 631     $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
 632
 633     /* We need to spread the articles on 3 columns.
 634        I did not want to use a JavaScript lib like http://masonry.desandro.com/
 635        so I manually spread entries with a simple method: I roughly evaluate the
 636        height of a div according to title and description length.
 637     */
 638     $columns = array(array(), array(), array()); // Entries to display, for each column.
 639     $fill = array(0, 0, 0);  // Rough estimate of columns fill.
 640     foreach($data['linksToDisplay'] as $key => $link) {
 641         // Roughly estimate length of entry (by counting characters)
 642         // Title: 30 chars = 1 line. 1 line is 30 pixels height.
 643         // Description: 836 characters gives roughly 342 pixel height.
 644         // This is not perfect, but it's usually OK.
 645         $length = strlen($link['title']) + (342 * strlen($link['description'])) / 836;
 646         if ($link['thumbnail']) {
 647           $length += 100; // 1 thumbnails roughly takes 100 pixels height.
 648         }
 649         // Then put in column which is the less filled:
 650         $smallest = min($fill); // find smallest value in array.
 651         $index = array_search($smallest, $fill); // find index of this smallest value.
 652         array_push($columns[$index], $link); // Put entry in this column.
 653         $fill[$index] += $length;
 654     }
 655
 656     $data['cols'] = $columns;
 657
 658     foreach ($data as $key => $value) {
 659         $pageBuilder->assign($key, $value);
 660     }
 661
 662     $pageBuilder->renderPage('daily');
 663     exit;
 664 }
 665
 666 /**
 667  * Renders the linklist
 668  *
 669  * @param pageBuilder   $PAGE    pageBuilder instance.
 670  * @param LinkDB        $LINKSDB LinkDB instance.
 671  * @param ConfigManager $conf    Configuration Manager instance.
 672  * @param PluginManager $pluginManager Plugin Manager instance.
 673  */
 674 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
 675     buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
 676     $PAGE->renderPage('linklist');
 677 }
 678
 679 /**
 680  * Render HTML page (according to URL parameters and user rights)
 681  *
 682  * @param ConfigManager  $conf           Configuration Manager instance.
 683  * @param PluginManager  $pluginManager  Plugin Manager instance,
 684  * @param LinkDB         $LINKSDB
 685  * @param History        $history        instance
 686  * @param SessionManager $sessionManager SessionManager instance
 687  */
 688 function renderPage($conf, $pluginManager, $LINKSDB, $history, $sessionManager)
 689 {
 690     $updater = new Updater(
 691         read_updates_file($conf->get('resource.updates')),
 692         $LINKSDB,
 693         $conf,
 694         isLoggedIn()
 695     );
 696     try {
 697         $newUpdates = $updater->update();
 698         if (! empty($newUpdates)) {
 699             write_updates_file(
 700                 $conf->get('resource.updates'),
 701                 $updater->getDoneUpdates()
 702             );
 703         }
 704     }
 705     catch(Exception $e) {
 706         die($e->getMessage());
 707     }
 708
 709     $PAGE = new PageBuilder($conf, $LINKSDB, $sessionManager->generateToken());
 710     $PAGE->assign('linkcount', count($LINKSDB));
 711     $PAGE->assign('privateLinkcount', count_private($LINKSDB));
 712     $PAGE->assign('plugin_errors', $pluginManager->getErrors());
 713
 714     // Determine which page will be rendered.
 715     $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
 716     $targetPage = Router::findPage($query, $_GET, isLoggedIn());
 717
 718     if (
 719         // if the user isn't logged in
 720         !isLoggedIn() &&
 721         // and Shaarli doesn't have public content...
 722         $conf->get('privacy.hide_public_links') &&
 723         // and is configured to enforce the login
 724         $conf->get('privacy.force_login') &&
 725         // and the current page isn't already the login page
 726         $targetPage !== Router::$PAGE_LOGIN &&
 727         // and the user is not requesting a feed (which would lead to a different content-type as expected)
 728         $targetPage !== Router::$PAGE_FEED_ATOM &&
 729         $targetPage !== Router::$PAGE_FEED_RSS
 730     ) {
 731         // force current page to be the login page
 732         $targetPage = Router::$PAGE_LOGIN;
 733     }
 734
 735     // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
 736     // Then assign generated data to RainTPL.
 737     $common_hooks = array(
 738         'includes',
 739         'header',
 740         'footer',
 741     );
 742
 743     foreach($common_hooks as $name) {
 744         $plugin_data = array();
 745         $pluginManager->executeHooks('render_' . $name, $plugin_data,
 746             array(
 747                 'target' => $targetPage,
 748                 'loggedin' => isLoggedIn()
 749             )
 750         );
 751         $PAGE->assign('plugins_' . $name, $plugin_data);
 752     }
 753
 754     // -------- Display login form.
 755     if ($targetPage == Router::$PAGE_LOGIN)
 756     {
 757         if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 758         if (isset($_GET['username'])) {
 759             $PAGE->assign('username', escape($_GET['username']));
 760         }
 761         $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
 762         // add default state of the 'remember me' checkbox
 763         $PAGE->assign('remember_user_default', $conf->get('privacy.remember_user_default'));
 764         $PAGE->renderPage('loginform');
 765         exit;
 766     }
 767     // -------- User wants to logout.
 768     if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
 769     {
 770         invalidateCaches($conf->get('resource.page_cache'));
 771         logout();
 772         header('Location: ?');
 773         exit;
 774     }
 775
 776     // -------- Picture wall
 777     if ($targetPage == Router::$PAGE_PICWALL)
 778     {
 779         // Optionally filter the results:
 780         $links = $LINKSDB->filterSearch($_GET);
 781         $linksToDisplay = array();
 782
 783         // Get only links which have a thumbnail.
 784         foreach($links as $link)
 785         {
 786             $permalink='?'.$link['shorturl'];
 787             $thumb=lazyThumbnail($conf, $link['url'],$permalink);
 788             if ($thumb!='') // Only output links which have a thumbnail.
 789             {
 790                 $link['thumbnail']=$thumb; // Thumbnail HTML code.
 791                 $linksToDisplay[]=$link; // Add to array.
 792             }
 793         }
 794
 795         $data = array(
 796             'linksToDisplay' => $linksToDisplay,
 797         );
 798         $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
 799
 800         foreach ($data as $key => $value) {
 801             $PAGE->assign($key, $value);
 802         }
 803
 804         $PAGE->renderPage('picwall');
 805         exit;
 806     }
 807
 808     // -------- Tag cloud
 809     if ($targetPage == Router::$PAGE_TAGCLOUD)
 810     {
 811         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 812         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 813         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 814
 815         // We sort tags alphabetically, then choose a font size according to count.
 816         // First, find max value.
 817         $maxcount = 0;
 818         foreach ($tags as $value) {
 819             $maxcount = max($maxcount, $value);
 820         }
 821
 822         alphabetical_sort($tags, false, true);
 823
 824         $tagList = array();
 825         foreach($tags as $key => $value) {
 826             if (in_array($key, $filteringTags)) {
 827                 continue;
 828             }
 829             // Tag font size scaling:
 830             //   default 15 and 30 logarithm bases affect scaling,
 831             //   22 and 6 are arbitrary font sizes for max and min sizes.
 832             $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
 833             $tagList[$key] = array(
 834                 'count' => $value,
 835                 'size' => number_format($size, 2, '.', ''),
 836             );
 837         }
 838
 839         $data = array(
 840             'search_tags' => implode(' ', escape($filteringTags)),
 841             'tags' => $tagList,
 842         );
 843         $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
 844
 845         foreach ($data as $key => $value) {
 846             $PAGE->assign($key, $value);
 847         }
 848
 849         $PAGE->renderPage('tag.cloud');
 850         exit;
 851     }
 852
 853     // -------- Tag list
 854     if ($targetPage == Router::$PAGE_TAGLIST)
 855     {
 856         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
 857         $filteringTags = isset($_GET['searchtags']) ? explode(' ', $_GET['searchtags']) : [];
 858         $tags = $LINKSDB->linksCountPerTag($filteringTags, $visibility);
 859         foreach ($filteringTags as $tag) {
 860             if (array_key_exists($tag, $tags)) {
 861                 unset($tags[$tag]);
 862             }
 863         }
 864
 865         if (! empty($_GET['sort']) && $_GET['sort'] === 'alpha') {
 866             alphabetical_sort($tags, false, true);
 867         }
 868
 869         $data = [
 870             'search_tags' => implode(' ', escape($filteringTags)),
 871             'tags' => $tags,
 872         ];
 873         $pluginManager->executeHooks('render_taglist', $data, ['loggedin' => isLoggedIn()]);
 874
 875         foreach ($data as $key => $value) {
 876             $PAGE->assign($key, $value);
 877         }
 878
 879         $PAGE->renderPage('tag.list');
 880         exit;
 881     }
 882
 883     // Daily page.
 884     if ($targetPage == Router::$PAGE_DAILY) {
 885         showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
 886     }
 887
 888     // ATOM and RSS feed.
 889     if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
 890         $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
 891         header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
 892
 893         // Cache system
 894         $query = $_SERVER['QUERY_STRING'];
 895         $cache = new CachedPage(
 896             $conf->get('resource.page_cache'),
 897             page_url($_SERVER),
 898             startsWith($query,'do='. $targetPage) && !isLoggedIn()
 899         );
 900         $cached = $cache->cachedVersion();
 901         if (!empty($cached)) {
 902             echo $cached;
 903             exit;
 904         }
 905
 906         // Generate data.
 907         $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
 908         $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
 909         $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
 910         $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
 911         $data = $feedGenerator->buildData();
 912
 913         // Process plugin hook.
 914         $pluginManager->executeHooks('render_feed', $data, array(
 915             'loggedin' => isLoggedIn(),
 916             'target' => $targetPage,
 917         ));
 918
 919         // Render the template.
 920         $PAGE->assignAll($data);
 921         $PAGE->renderPage('feed.'. $feedType);
 922         $cache->cache(ob_get_contents());
 923         ob_end_flush();
 924         exit;
 925     }
 926
 927     // Display opensearch plugin (XML)
 928     if ($targetPage == Router::$PAGE_OPENSEARCH) {
 929         header('Content-Type: application/xml; charset=utf-8');
 930         $PAGE->assign('serverurl', index_url($_SERVER));
 931         $PAGE->renderPage('opensearch');
 932         exit;
 933     }
 934
 935     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 936     if (isset($_GET['addtag']))
 937     {
 938         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 939         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 940         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 941
 942         // Prevent redirection loop
 943         if (isset($params['addtag'])) {
 944             unset($params['addtag']);
 945         }
 946
 947         // Check if this tag is already in the search query and ignore it if it is.
 948         // Each tag is always separated by a space
 949         if (isset($params['searchtags'])) {
 950             $current_tags = explode(' ', $params['searchtags']);
 951         } else {
 952             $current_tags = array();
 953         }
 954         $addtag = true;
 955         foreach ($current_tags as $value) {
 956             if ($value === $_GET['addtag']) {
 957                 $addtag = false;
 958                 break;
 959             }
 960         }
 961         // Append the tag if necessary
 962         if (empty($params['searchtags'])) {
 963             $params['searchtags'] = trim($_GET['addtag']);
 964         }
 965         else if ($addtag) {
 966             $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
 967         }
 968
 969         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 970         header('Location: ?'.http_build_query($params));
 971         exit;
 972     }
 973
 974     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 975     if (isset($_GET['removetag'])) {
 976         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 977         if (empty($_SERVER['HTTP_REFERER'])) {
 978             header('Location: ?');
 979             exit;
 980         }
 981
 982         // In case browser does not send HTTP_REFERER
 983         parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
 984
 985         // Prevent redirection loop
 986         if (isset($params['removetag'])) {
 987             unset($params['removetag']);
 988         }
 989
 990         if (isset($params['searchtags'])) {
 991             $tags = explode(' ', $params['searchtags']);
 992             // Remove value from array $tags.
 993             $tags = array_diff($tags, array($_GET['removetag']));
 994             $params['searchtags'] = implode(' ',$tags);
 995
 996             if (empty($params['searchtags'])) {
 997                 unset($params['searchtags']);
 998             }
 999
1000             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1001         }
1002         header('Location: ?'.http_build_query($params));
1003         exit;
1004     }
1005
1006     // -------- User wants to change the number of links per page (linksperpage=...)
1007     if (isset($_GET['linksperpage'])) {
1008         if (is_numeric($_GET['linksperpage'])) {
1009             $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1010         }
1011
1012         if (! empty($_SERVER['HTTP_REFERER'])) {
1013             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage'));
1014         } else {
1015             $location = '?';
1016         }
1017         header('Location: '. $location);
1018         exit;
1019     }
1020
1021     // -------- User wants to see only private links (toggle)
1022     if (isset($_GET['visibility'])) {
1023         if ($_GET['visibility'] === 'private') {
1024             // Visibility not set or not already private, set private, otherwise reset it
1025             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'private') {
1026                 // See only private links
1027                 $_SESSION['visibility'] = 'private';
1028             } else {
1029                 unset($_SESSION['visibility']);
1030             }
1031         } else if ($_GET['visibility'] === 'public') {
1032             if (empty($_SESSION['visibility']) || $_SESSION['visibility'] !== 'public') {
1033                 // See only public links
1034                 $_SESSION['visibility'] = 'public';
1035             } else {
1036                 unset($_SESSION['visibility']);
1037             }
1038         }
1039
1040         if (! empty($_SERVER['HTTP_REFERER'])) {
1041             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('visibility'));
1042         } else {
1043             $location = '?';
1044         }
1045         header('Location: '. $location);
1046         exit;
1047     }
1048
1049     // -------- User wants to see only untagged links (toggle)
1050     if (isset($_GET['untaggedonly'])) {
1051         $_SESSION['untaggedonly'] = empty($_SESSION['untaggedonly']);
1052
1053         if (! empty($_SERVER['HTTP_REFERER'])) {
1054             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));
1055         } else {
1056             $location = '?';
1057         }
1058         header('Location: '. $location);
1059         exit;
1060     }
1061
1062     // -------- Handle other actions allowed for non-logged in users:
1063     if (!isLoggedIn())
1064     {
1065         // User tries to post new link but is not logged in:
1066         // Show login screen, then redirect to ?post=...
1067         if (isset($_GET['post']))
1068         {
1069             header( // Redirect to login page, then back to post link.
1070                 'Location: ?do=login&post='.urlencode($_GET['post']).
1071                 (!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').
1072                 (!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').
1073                 (!empty($_GET['tags'])?'&tags='.urlencode($_GET['tags']):'').
1074                 (!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')
1075             );
1076             exit;
1077         }
1078
1079         showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1080         if (isset($_GET['edit_link'])) {
1081             header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1082             exit;
1083         }
1084
1085         exit; // Never remove this one! All operations below are reserved for logged in user.
1086     }
1087
1088     // -------- All other functions are reserved for the registered user:
1089
1090     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1091     if ($targetPage == Router::$PAGE_TOOLS)
1092     {
1093         $data = [
1094             'pageabsaddr' => index_url($_SERVER),
1095             'sslenabled' => is_https($_SERVER),
1096         ];
1097         $pluginManager->executeHooks('render_tools', $data);
1098
1099         foreach ($data as $key => $value) {
1100             $PAGE->assign($key, $value);
1101         }
1102
1103         $PAGE->renderPage('tools');
1104         exit;
1105     }
1106
1107     // -------- User wants to change his/her password.
1108     if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1109     {
1110         if ($conf->get('security.open_shaarli')) {
1111             die(t('You are not supposed to change a password on an Open Shaarli.'));
1112         }
1113
1114         if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1115         {
1116             if (!$sessionManager->checkToken($_POST['token'])) die(t('Wrong token.')); // Go away!
1117
1118             // Make sure old password is correct.
1119             $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1120             if ($oldhash!= $conf->get('credentials.hash')) {
1121                 echo '<script>alert("'. t('The old password is not correct.') .'");document.location=\'?do=changepasswd\';</script>';
1122                 exit;
1123             }
1124             // Save new password
1125             // Salt renders rainbow-tables attacks useless.
1126             $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1127             $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1128             try {
1129                 $conf->write(isLoggedIn());
1130             }
1131             catch(Exception $e) {
1132                 error_log(
1133                     'ERROR while writing config file after changing password.' . PHP_EOL .
1134                     $e->getMessage()
1135                 );
1136
1137                 // TODO: do not handle exceptions/errors in JS.
1138                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1139                 exit;
1140             }
1141             echo '<script>alert("'. t('Your password has been changed') .'");document.location=\'?do=tools\';</script>';
1142             exit;
1143         }
1144         else // show the change password form.
1145         {
1146             $PAGE->renderPage('changepassword');
1147             exit;
1148         }
1149     }
1150
1151     // -------- User wants to change configuration
1152     if ($targetPage == Router::$PAGE_CONFIGURE)
1153     {
1154         if (!empty($_POST['title']) )
1155         {
1156             if (!$sessionManager->checkToken($_POST['token'])) {
1157                 die(t('Wrong token.')); // Go away!
1158             }
1159             $tz = 'UTC';
1160             if (!empty($_POST['continent']) && !empty($_POST['city'])
1161                 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1162             ) {
1163                 $tz = $_POST['continent'] . '/' . $_POST['city'];
1164             }
1165             $conf->set('general.timezone', $tz);
1166             $conf->set('general.title', escape($_POST['title']));
1167             $conf->set('general.header_link', escape($_POST['titleLink']));
1168             $conf->set('resource.theme', escape($_POST['theme']));
1169             $conf->set('redirector.url', escape($_POST['redirector']));
1170             $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1171             $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1172             $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1173             $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1174             $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1175             $conf->set('api.enabled', !empty($_POST['enableApi']));
1176             $conf->set('api.secret', escape($_POST['apiSecret']));
1177             $conf->set('translation.language', escape($_POST['language']));
1178
1179             try {
1180                 $conf->write(isLoggedIn());
1181                 $history->updateSettings();
1182                 invalidateCaches($conf->get('resource.page_cache'));
1183             }
1184             catch(Exception $e) {
1185                 error_log(
1186                     'ERROR while writing config file after configuration update.' . PHP_EOL .
1187                     $e->getMessage()
1188                 );
1189
1190                 // TODO: do not handle exceptions/errors in JS.
1191                 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1192                 exit;
1193             }
1194             echo '<script>alert("'. t('Configuration was saved.') .'");document.location=\'?do=configure\';</script>';
1195             exit;
1196         }
1197         else // Show the configuration form.
1198         {
1199             $PAGE->assign('title', $conf->get('general.title'));
1200             $PAGE->assign('theme', $conf->get('resource.theme'));
1201             $PAGE->assign('theme_available', ThemeUtils::getThemes($conf->get('resource.raintpl_tpl')));
1202             $PAGE->assign('redirector', $conf->get('redirector.url'));
1203             list($continents, $cities) = generateTimeZoneData(
1204                 timezone_identifiers_list(),
1205                 $conf->get('general.timezone')
1206             );
1207             $PAGE->assign('continents', $continents);
1208             $PAGE->assign('cities', $cities);
1209             $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1210             $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1211             $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1212             $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1213             $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1214             $PAGE->assign('api_enabled', $conf->get('api.enabled', true));
1215             $PAGE->assign('api_secret', $conf->get('api.secret'));
1216             $PAGE->assign('languages', Languages::getAvailableLanguages());
1217             $PAGE->assign('language', $conf->get('translation.language'));
1218             $PAGE->renderPage('configure');
1219             exit;
1220         }
1221     }
1222
1223     // -------- User wants to rename a tag or delete it
1224     if ($targetPage == Router::$PAGE_CHANGETAG)
1225     {
1226         if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1227             $PAGE->assign('fromtag', ! empty($_GET['fromtag']) ? escape($_GET['fromtag']) : '');
1228             $PAGE->renderPage('changetag');
1229             exit;
1230         }
1231
1232         if (!$sessionManager->checkToken($_POST['token'])) {
1233             die(t('Wrong token.'));
1234         }
1235
1236         $alteredLinks = $LINKSDB->renameTag(escape($_POST['fromtag']), escape($_POST['totag']));
1237         $LINKSDB->save($conf->get('resource.page_cache'));
1238         foreach ($alteredLinks as $link) {
1239             $history->updateLink($link);
1240         }
1241         $delete = empty($_POST['totag']);
1242         $redirect = $delete ? 'do=changetag' : 'searchtags='. urlencode(escape($_POST['totag']));
1243         $count = count($alteredLinks);
1244         $alert = $delete
1245             ? sprintf(t('The tag was removed from %d link.', 'The tag was removed from %d links.', $count), $count)
1246             : sprintf(t('The tag was renamed in %d link.', 'The tag was renamed in %d links.', $count), $count);
1247         echo '<script>alert("'. $alert .'");document.location=\'?'. $redirect .'\';</script>';
1248         exit;
1249     }
1250
1251     // -------- User wants to add a link without using the bookmarklet: Show form.
1252     if ($targetPage == Router::$PAGE_ADDLINK)
1253     {
1254         $PAGE->renderPage('addlink');
1255         exit;
1256     }
1257
1258     // -------- User clicked the "Save" button when editing a link: Save link to database.
1259     if (isset($_POST['save_edit']))
1260     {
1261         // Go away!
1262         if (! $sessionManager->checkToken($_POST['token'])) {
1263             die(t('Wrong token.'));
1264         }
1265
1266         // lf_id should only be present if the link exists.
1267         $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1268         // Linkdate is kept here to:
1269         //   - use the same permalink for notes as they're displayed when creating them
1270         //   - let users hack creation date of their posts
1271         //     See: https://shaarli.readthedocs.io/en/master/Various-hacks/#changing-the-timestamp-for-a-shaare
1272         $linkdate = escape($_POST['lf_linkdate']);
1273         if (isset($LINKSDB[$id])) {
1274             // Edit
1275             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1276             $updated = new DateTime();
1277             $shortUrl = $LINKSDB[$id]['shorturl'];
1278             $new = false;
1279         } else {
1280             // New link
1281             $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1282             $updated = null;
1283             $shortUrl = link_small_hash($created, $id);
1284             $new = true;
1285         }
1286
1287         // Remove multiple spaces.
1288         $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1289         // Remove first '-' char in tags.
1290         $tags = preg_replace('/(^| )\-/', '$1', $tags);
1291         // Remove duplicates.
1292         $tags = implode(' ', array_unique(explode(' ', $tags)));
1293
1294         if (empty(trim($_POST['lf_url']))) {
1295             $_POST['lf_url'] = '?' . smallHash($linkdate . $id);
1296         }
1297         $url = whitelist_protocols(trim($_POST['lf_url']), $conf->get('security.allowed_protocols'));
1298
1299         $link = array(
1300             'id' => $id,
1301             'title' => trim($_POST['lf_title']),
1302             'url' => $url,
1303             'description' => $_POST['lf_description'],
1304             'private' => (isset($_POST['lf_private']) ? 1 : 0),
1305             'created' => $created,
1306             'updated' => $updated,
1307             'tags' => str_replace(',', ' ', $tags),
1308             'shorturl' => $shortUrl,
1309         );
1310
1311         // If title is empty, use the URL as title.
1312         if ($link['title'] == '') {
1313             $link['title'] = $link['url'];
1314         }
1315
1316         $pluginManager->executeHooks('save_link', $link);
1317
1318         $LINKSDB[$id] = $link;
1319         $LINKSDB->save($conf->get('resource.page_cache'));
1320         if ($new) {
1321             $history->addLink($link);
1322         } else {
1323             $history->updateLink($link);
1324         }
1325
1326         // If we are called from the bookmarklet, we must close the popup:
1327         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1328             echo '<script>self.close();</script>';
1329             exit;
1330         }
1331
1332         $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1333         $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1334         // Scroll to the link which has been edited.
1335         $location .= '#' . $link['shorturl'];
1336         // After saving the link, redirect to the page the user was on.
1337         header('Location: '. $location);
1338         exit;
1339     }
1340
1341     // -------- User clicked the "Cancel" button when editing a link.
1342     if (isset($_POST['cancel_edit']))
1343     {
1344         $id = isset($_POST['lf_id']) ? (int) escape($_POST['lf_id']) : false;
1345         if (! isset($LINKSDB[$id])) {
1346             header('Location: ?');
1347         }
1348         // If we are called from the bookmarklet, we must close the popup:
1349         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1350         $link = $LINKSDB[$id];
1351         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1352         // Scroll to the link which has been edited.
1353         $returnurl .= '#'. $link['shorturl'];
1354         $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1355         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1356         exit;
1357     }
1358
1359     // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1360     if ($targetPage == Router::$PAGE_DELETELINK)
1361     {
1362         if (! $sessionManager->checkToken($_GET['token'])) {
1363             die(t('Wrong token.'));
1364         }
1365
1366         $ids = trim($_GET['lf_linkdate']);
1367         if (strpos($ids, ' ') !== false) {
1368             // multiple, space-separated ids provided
1369             $ids = array_values(array_filter(preg_split('/\s+/', escape($ids))));
1370         } else {
1371             // only a single id provided
1372             $ids = [$ids];
1373         }
1374         // assert at least one id is given
1375         if(!count($ids)){
1376             die('no id provided');
1377         }
1378         foreach ($ids as $id) {
1379             $id = (int) escape($id);
1380             $link = $LINKSDB[$id];
1381             $pluginManager->executeHooks('delete_link', $link);
1382             unset($LINKSDB[$id]);
1383         }
1384         $LINKSDB->save($conf->get('resource.page_cache')); // save to disk
1385         $history->deleteLink($link);
1386
1387         // If we are called from the bookmarklet, we must close the popup:
1388         if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1389
1390         $location = '?';
1391         if (isset($_SERVER['HTTP_REFERER'])) {
1392             // Don't redirect to where we were previously if it was a permalink or an edit_link, because it would 404.
1393             $location = generateLocation(
1394                     $_SERVER['HTTP_REFERER'],
1395                     $_SERVER['HTTP_HOST'],
1396                     ['delete_link', 'edit_link', $link['shorturl']]
1397             );
1398         }
1399
1400         header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1401         exit;
1402     }
1403
1404     // -------- User clicked the "EDIT" button on a link: Display link edit form.
1405     if (isset($_GET['edit_link']))
1406     {
1407         $id = (int) escape($_GET['edit_link']);
1408         $link = $LINKSDB[$id];  // Read database
1409         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1410         $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1411         $data = array(
1412             'link' => $link,
1413             'link_is_new' => false,
1414             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1415             'tags' => $LINKSDB->linksCountPerTag(),
1416         );
1417         $pluginManager->executeHooks('render_editlink', $data);
1418
1419         foreach ($data as $key => $value) {
1420             $PAGE->assign($key, $value);
1421         }
1422
1423         $PAGE->renderPage('editlink');
1424         exit;
1425     }
1426
1427     // -------- User want to post a new link: Display link edit form.
1428     if (isset($_GET['post'])) {
1429         $url = cleanup_url($_GET['post']);
1430
1431         $link_is_new = false;
1432         // Check if URL is not already in database (in this case, we will edit the existing link)
1433         $link = $LINKSDB->getLinkFromUrl($url);
1434         if (! $link)
1435         {
1436             $link_is_new = true;
1437             $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1438             // Get title if it was provided in URL (by the bookmarklet).
1439             $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1440             // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1441             $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1442             $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1443             $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1444             // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1445             if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1446                 // Short timeout to keep the application responsive
1447                 // The callback will fill $charset and $title with data from the downloaded page.
1448                 get_http_response($url, 25, 4194304, get_curl_download_callback($charset, $title));
1449                 if (! empty($title) && strtolower($charset) != 'utf-8') {
1450                     $title = mb_convert_encoding($title, 'utf-8', $charset);
1451                 }
1452             }
1453
1454             if ($url == '') {
1455                 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1456                 $title = $conf->get('general.default_note_title', t('Note: '));
1457             }
1458             $url = escape($url);
1459             $title = escape($title);
1460
1461             $link = array(
1462                 'linkdate' => $linkdate,
1463                 'title' => $title,
1464                 'url' => $url,
1465                 'description' => $description,
1466                 'tags' => $tags,
1467                 'private' => $private,
1468             );
1469         } else {
1470             $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1471         }
1472
1473         $data = array(
1474             'link' => $link,
1475             'link_is_new' => $link_is_new,
1476             'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1477             'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1478             'tags' => $LINKSDB->linksCountPerTag(),
1479             'default_private_links' => $conf->get('privacy.default_private_links', false),
1480         );
1481         $pluginManager->executeHooks('render_editlink', $data);
1482
1483         foreach ($data as $key => $value) {
1484             $PAGE->assign($key, $value);
1485         }
1486
1487         $PAGE->renderPage('editlink');
1488         exit;
1489     }
1490
1491     if ($targetPage == Router::$PAGE_EXPORT) {
1492         // Export links as a Netscape Bookmarks file
1493
1494         if (empty($_GET['selection'])) {
1495             $PAGE->renderPage('export');
1496             exit;
1497         }
1498
1499         // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1500         $selection = $_GET['selection'];
1501         if (isset($_GET['prepend_note_url'])) {
1502             $prependNoteUrl = $_GET['prepend_note_url'];
1503         } else {
1504             $prependNoteUrl = false;
1505         }
1506
1507         try {
1508             $PAGE->assign(
1509                 'links',
1510                 NetscapeBookmarkUtils::filterAndFormat(
1511                     $LINKSDB,
1512                     $selection,
1513                     $prependNoteUrl,
1514                     index_url($_SERVER)
1515                 )
1516             );
1517         } catch (Exception $exc) {
1518             header('Content-Type: text/plain; charset=utf-8');
1519             echo $exc->getMessage();
1520             exit;
1521         }
1522         $now = new DateTime();
1523         header('Content-Type: text/html; charset=utf-8');
1524         header(
1525             'Content-disposition: attachment; filename=bookmarks_'
1526            .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1527         );
1528         $PAGE->assign('date', $now->format(DateTime::RFC822));
1529         $PAGE->assign('eol', PHP_EOL);
1530         $PAGE->assign('selection', $selection);
1531         $PAGE->renderPage('export.bookmarks');
1532         exit;
1533     }
1534
1535     if ($targetPage == Router::$PAGE_IMPORT) {
1536         // Upload a Netscape bookmark dump to import its contents
1537
1538         if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1539             // Show import dialog
1540             $PAGE->assign(
1541                 'maxfilesize',
1542                 get_max_upload_size(
1543                     ini_get('post_max_size'),
1544                     ini_get('upload_max_filesize'),
1545                     false
1546                 )
1547             );
1548             $PAGE->assign(
1549                 'maxfilesizeHuman',
1550                 get_max_upload_size(
1551                     ini_get('post_max_size'),
1552                     ini_get('upload_max_filesize'),
1553                     true
1554                 )
1555             );
1556             $PAGE->renderPage('import');
1557             exit;
1558         }
1559
1560         // Import bookmarks from an uploaded file
1561         if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1562             // The file is too big or some form field may be missing.
1563             $msg = sprintf(
1564                 t(
1565                     'The file you are trying to upload is probably bigger than what this webserver can accept'
1566                     .' (%s). Please upload in smaller chunks.'
1567                 ),
1568                 get_max_upload_size(ini_get('post_max_size'), ini_get('upload_max_filesize'))
1569             );
1570             echo '<script>alert("'. $msg .'");document.location=\'?do='.Router::$PAGE_IMPORT .'\';</script>';
1571             exit;
1572         }
1573         if (! $sessionManager->checkToken($_POST['token'])) {
1574             die('Wrong token.');
1575         }
1576         $status = NetscapeBookmarkUtils::import(
1577             $_POST,
1578             $_FILES,
1579             $LINKSDB,
1580             $conf,
1581             $history
1582         );
1583         echo '<script>alert("'.$status.'");document.location=\'?do='
1584              .Router::$PAGE_IMPORT .'\';</script>';
1585         exit;
1586     }
1587
1588     // Plugin administration page
1589     if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1590         $pluginMeta = $pluginManager->getPluginsMeta();
1591
1592         // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1593         $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1594         // Load parameters.
1595         $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1596         uasort(
1597             $enabledPlugins,
1598             function($a, $b) { return $a['order'] - $b['order']; }
1599         );
1600         $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1601
1602         $PAGE->assign('enabledPlugins', $enabledPlugins);
1603         $PAGE->assign('disabledPlugins', $disabledPlugins);
1604         $PAGE->renderPage('pluginsadmin');
1605         exit;
1606     }
1607
1608     // Plugin administration form action
1609     if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1610         try {
1611             if (isset($_POST['parameters_form'])) {
1612                 unset($_POST['parameters_form']);
1613                 foreach ($_POST as $param => $value) {
1614                     $conf->set('plugins.'. $param, escape($value));
1615                 }
1616             }
1617             else {
1618                 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1619             }
1620             $conf->write(isLoggedIn());
1621             $history->updateSettings();
1622         }
1623         catch (Exception $e) {
1624             error_log(
1625                 'ERROR while saving plugin configuration:.' . PHP_EOL .
1626                 $e->getMessage()
1627             );
1628
1629             // TODO: do not handle exceptions/errors in JS.
1630             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1631             exit;
1632         }
1633         header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1634         exit;
1635     }
1636
1637     // Get a fresh token
1638     if ($targetPage == Router::$GET_TOKEN) {
1639         header('Content-Type:text/plain');
1640         echo $sessionManager->generateToken($conf);
1641         exit;
1642     }
1643
1644     // -------- Otherwise, simply display search form and links:
1645     showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1646     exit;
1647 }
1648
1649 /**
1650  * Template for the list of links (<div id="linklist">)
1651  * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1652  *
1653  * @param pageBuilder   $PAGE          pageBuilder instance.
1654  * @param LinkDB        $LINKSDB       LinkDB instance.
1655  * @param ConfigManager $conf          Configuration Manager instance.
1656  * @param PluginManager $pluginManager Plugin Manager instance.
1657  */
1658 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1659 {
1660     // Used in templates
1661     if (isset($_GET['searchtags'])) {
1662         if (! empty($_GET['searchtags'])) {
1663             $searchtags = escape(normalize_spaces($_GET['searchtags']));
1664         } else {
1665             $searchtags = false;
1666         }
1667     } else {
1668         $searchtags = '';
1669     }
1670     $searchterm = !empty($_GET['searchterm']) ? escape(normalize_spaces($_GET['searchterm'])) : '';
1671
1672     // Smallhash filter
1673     if (! empty($_SERVER['QUERY_STRING'])
1674         && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1675         try {
1676             $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1677         } catch (LinkNotFoundException $e) {
1678             $PAGE->render404($e->getMessage());
1679             exit;
1680         }
1681     } else {
1682         // Filter links according search parameters.
1683         $visibility = ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '';
1684         $request = [
1685             'searchtags' => $searchtags,
1686             'searchterm' => $searchterm,
1687         ];
1688         $linksToDisplay = $LINKSDB->filterSearch($request, false, $visibility, !empty($_SESSION['untaggedonly']));
1689     }
1690
1691     // ---- Handle paging.
1692     $keys = array();
1693     foreach ($linksToDisplay as $key => $value) {
1694         $keys[] = $key;
1695     }
1696
1697
1698
1699     // Select articles according to paging.
1700     $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1701     $pagecount = $pagecount == 0 ? 1 : $pagecount;
1702     $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1703     $page = $page < 1 ? 1 : $page;
1704     $page = $page > $pagecount ? $pagecount : $page;
1705     // Start index.
1706     $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1707     $end = $i + $_SESSION['LINKS_PER_PAGE'];
1708     $linkDisp = array();
1709     while ($i<$end && $i<count($keys))
1710     {
1711         $link = $linksToDisplay[$keys[$i]];
1712         $link['description'] = format_description(
1713             $link['description'],
1714             $conf->get('redirector.url'),
1715             $conf->get('redirector.encode_url')
1716         );
1717         $classLi =  ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1718         $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1719         $link['timestamp'] = $link['created']->getTimestamp();
1720         if (! empty($link['updated'])) {
1721             $link['updated_timestamp'] = $link['updated']->getTimestamp();
1722         } else {
1723             $link['updated_timestamp'] = '';
1724         }
1725         $taglist = preg_split('/\s+/', $link['tags'], -1, PREG_SPLIT_NO_EMPTY);
1726         uasort($taglist, 'strcasecmp');
1727         $link['taglist'] = $taglist;
1728         // Check for both signs of a note: starting with ? and 7 chars long.
1729         if ($link['url'][0] === '?' &&
1730             strlen($link['url']) === 7) {
1731             $link['url'] = index_url($_SERVER) . $link['url'];
1732         }
1733
1734         $linkDisp[$keys[$i]] = $link;
1735         $i++;
1736     }
1737
1738     // Compute paging navigation
1739     $searchtagsUrl = $searchtags === '' ? '' : '&searchtags=' . urlencode($searchtags);
1740     $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1741     $previous_page_url = '';
1742     if ($i != count($keys)) {
1743         $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1744     }
1745     $next_page_url='';
1746     if ($page>1) {
1747         $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1748     }
1749
1750     // Fill all template fields.
1751     $data = array(
1752         'previous_page_url' => $previous_page_url,
1753         'next_page_url' => $next_page_url,
1754         'page_current' => $page,
1755         'page_max' => $pagecount,
1756         'result_count' => count($linksToDisplay),
1757         'search_term' => $searchterm,
1758         'search_tags' => $searchtags,
1759         'visibility' => ! empty($_SESSION['visibility']) ? $_SESSION['visibility'] : '',
1760         'redirector' => $conf->get('redirector.url'),  // Optional redirector URL.
1761         'links' => $linkDisp,
1762     );
1763
1764     // If there is only a single link, we change on-the-fly the title of the page.
1765     if (count($linksToDisplay) == 1) {
1766         $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1767     }
1768
1769     $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1770
1771     foreach ($data as $key => $value) {
1772         $PAGE->assign($key, $value);
1773     }
1774
1775     return;
1776 }
1777
1778 /**
1779  * Compute the thumbnail for a link.
1780  *
1781  * With a link to the original URL.
1782  * Understands various services (youtube.com...)
1783  * Input: $url = URL for which the thumbnail must be found.
1784  *        $href = if provided, this URL will be followed instead of $url
1785  * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1786  * Some of them may be missing.
1787  * Return an empty array if no thumbnail available.
1788  *
1789  * @param ConfigManager $conf Configuration Manager instance.
1790  * @param string        $url
1791  * @param string|bool   $href
1792  *
1793  * @return array
1794  */
1795 function computeThumbnail($conf, $url, $href = false)
1796 {
1797     if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1798     if ($href==false) $href=$url;
1799
1800     // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1801     // (e.g. http://www.youtube.com/watch?v=spVypYk4kto --->  http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1802     //                                     ^^^^^^^^^^^                                 ^^^^^^^^^^^
1803     $domain = parse_url($url,PHP_URL_HOST);
1804     if ($domain=='youtube.com' || $domain=='www.youtube.com')
1805     {
1806         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1807         if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1808                                                'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1809     }
1810     if ($domain=='youtu.be') // Youtube short links
1811     {
1812         $path = parse_url($url,PHP_URL_PATH);
1813         return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1814                      'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1815     }
1816     if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1817     {
1818         parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1819         if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1820                                                                     'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1821     }
1822
1823     if ($domain=='imgur.com')
1824     {
1825         $path = parse_url($url,PHP_URL_PATH);
1826         if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1827         if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1828                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1829         if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1830                                                         'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1831
1832         if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1833                                                      'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1834     }
1835     if ($domain=='i.imgur.com')
1836     {
1837         $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1838         if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1839                                                   'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1840     }
1841     if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1842     {
1843         if (strpos($url,'dailymotion.com/video/')!==false)
1844         {
1845             $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1846             return array('src'=>$thumburl,
1847                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1848         }
1849     }
1850     if (endsWith($domain,'.imageshack.us'))
1851     {
1852         $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1853         if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1854         {
1855             $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1856             return array('src'=>$thumburl,
1857                          'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1858         }
1859     }
1860
1861     // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1862     // So we deport the thumbnail generation in order not to slow down page generation
1863     // (and we also cache the thumbnail)
1864
1865     if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1866
1867     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1868         || $domain=='vimeo.com'
1869         || $domain=='ted.com' || endsWith($domain,'.ted.com')
1870         || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1871     )
1872     {
1873         if ($domain=='vimeo.com')
1874         {   // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1875             $path = parse_url($url,PHP_URL_PATH);
1876             if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1877         }
1878         if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1879         {   // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1880             $path = parse_url($url,PHP_URL_PATH);
1881             if (!preg_match('!/\d+.+?!',$path)) return array();
1882         }
1883         if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1884         {   // Make sure this TED URL points to a video (/talks/...)
1885             $path = parse_url($url,PHP_URL_PATH);
1886             if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1887         }
1888         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1889         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1890                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1891     }
1892
1893     // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1894     // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1895     // But using the extension will do.
1896     $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1897     if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1898     {
1899         $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1900         return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1901                      'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1902     }
1903     return array(); // No thumbnail.
1904
1905 }
1906
1907
1908 // Returns the HTML code to display a thumbnail for a link
1909 // with a link to the original URL.
1910 // Understands various services (youtube.com...)
1911 // Input: $url = URL for which the thumbnail must be found.
1912 //        $href = if provided, this URL will be followed instead of $url
1913 // Returns '' if no thumbnail available.
1914 function thumbnail($url,$href=false)
1915 {
1916     // FIXME!
1917     global $conf;
1918     $t = computeThumbnail($conf, $url,$href);
1919     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1920
1921     $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1922     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1923     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1924     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1925     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1926     $html.='></a>';
1927     return $html;
1928 }
1929
1930 // Returns the HTML code to display a thumbnail for a link
1931 // for the picture wall (using lazy image loading)
1932 // Understands various services (youtube.com...)
1933 // Input: $url = URL for which the thumbnail must be found.
1934 //        $href = if provided, this URL will be followed instead of $url
1935 // Returns '' if no thumbnail available.
1936 function lazyThumbnail($conf, $url,$href=false)
1937 {
1938     // FIXME!
1939     global $conf;
1940     $t = computeThumbnail($conf, $url,$href);
1941     if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1942
1943     $html='<a href="'.escape($t['href']).'">';
1944
1945     // Lazy image
1946     $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1947
1948     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1949     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1950     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1951     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1952     $html.='>';
1953
1954     // No-JavaScript fallback.
1955     $html.='<noscript><img src="'.escape($t['src']).'"';
1956     if (!empty($t['width']))  $html.=' width="'.escape($t['width']).'"';
1957     if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1958     if (!empty($t['style']))  $html.=' style="'.escape($t['style']).'"';
1959     if (!empty($t['alt']))    $html.=' alt="'.escape($t['alt']).'"';
1960     $html.='></noscript></a>';
1961
1962     return $html;
1963 }
1964
1965
1966 /**
1967  * Installation
1968  * This function should NEVER be called if the file data/config.php exists.
1969  *
1970  * @param ConfigManager  $conf           Configuration Manager instance.
1971  * @param SessionManager $sessionManager SessionManager instance
1972  */
1973 function install($conf, $sessionManager) {
1974     // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1975     if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1976
1977
1978     // This part makes sure sessions works correctly.
1979     // (Because on some hosts, session.save_path may not be set correctly,
1980     // or we may not have write access to it.)
1981     if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1982     {
1983         // Step 2: Check if data in session is correct.
1984         $msg = t(
1985             '<pre>Sessions do not seem to work correctly on your server.<br>'.
1986             'Make sure the variable "session.save_path" is set correctly in your PHP config, '.
1987             'and that you have write access to it.<br>'.
1988             'It currently points to %s.<br>'.
1989             'On some browsers, accessing your server via a hostname like \'localhost\' '.
1990             'or any custom hostname without a dot causes cookie storage to fail. '.
1991             'We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>'
1992         );
1993         $msg = sprintf($msg, session_save_path());
1994         echo $msg;
1995         echo '<br><a href="?">'. t('Click to try again.') .'</a></pre>';
1996         die;
1997     }
1998     if (!isset($_SESSION['session_tested']))
1999     {   // Step 1 : Try to store data in session and reload page.
2000         $_SESSION['session_tested'] = 'Working';  // Try to set a variable in session.
2001         header('Location: '.index_url($_SERVER).'?test_session');  // Redirect to check stored data.
2002     }
2003     if (isset($_GET['test_session']))
2004     {   // Step 3: Sessions are OK. Remove test parameter from URL.
2005         header('Location: '.index_url($_SERVER));
2006     }
2007
2008
2009     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2010     {
2011         $tz = 'UTC';
2012         if (!empty($_POST['continent']) && !empty($_POST['city'])
2013             && isTimeZoneValid($_POST['continent'], $_POST['city'])
2014         ) {
2015             $tz = $_POST['continent'].'/'.$_POST['city'];
2016         }
2017         $conf->set('general.timezone', $tz);
2018         $login = $_POST['setlogin'];
2019         $conf->set('credentials.login', $login);
2020         $salt = sha1(uniqid('', true) .'_'. mt_rand());
2021         $conf->set('credentials.salt', $salt);
2022         $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
2023         if (!empty($_POST['title'])) {
2024             $conf->set('general.title', escape($_POST['title']));
2025         } else {
2026             $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
2027         }
2028         $conf->set('translation.language', escape($_POST['language']));
2029         $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
2030         $conf->set('api.enabled', !empty($_POST['enableApi']));
2031         $conf->set(
2032             'api.secret',
2033             generate_api_secret(
2034                 $conf->get('credentials.login'),
2035                 $conf->get('credentials.salt')
2036             )
2037         );
2038         try {
2039             // Everything is ok, let's create config file.
2040             $conf->write(isLoggedIn());
2041         }
2042         catch(Exception $e) {
2043             error_log(
2044                     'ERROR while writing config file after installation.' . PHP_EOL .
2045                     $e->getMessage()
2046                 );
2047
2048             // TODO: do not handle exceptions/errors in JS.
2049             echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2050             exit;
2051         }
2052         echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2053         exit;
2054     }
2055
2056     $PAGE = new PageBuilder($conf, null, $sessionManager->generateToken());
2057     list($continents, $cities) = generateTimeZoneData(timezone_identifiers_list(), date_default_timezone_get());
2058     $PAGE->assign('continents', $continents);
2059     $PAGE->assign('cities', $cities);
2060     $PAGE->assign('languages', Languages::getAvailableLanguages());
2061     $PAGE->renderPage('install');
2062     exit;
2063 }
2064
2065 /**
2066  * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2067  * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2068  * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2069  * This function is called by passing the URL:
2070  * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2071  * [URL] is the URL of the link (e.g. a flickr page)
2072  * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2073  * The function below will fetch the image from the webservice and store it in the cache.
2074  *
2075  * @param ConfigManager $conf Configuration Manager instance,
2076  */
2077 function genThumbnail($conf)
2078 {
2079     // Make sure the parameters in the URL were generated by us.
2080     $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2081     if ($sign!=$_GET['hmac']) die('Naughty boy!');
2082
2083     $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2084     // Let's see if we don't already have the image for this URL in the cache.
2085     $thumbname=hash('sha1',$_GET['url']).'.jpg';
2086     if (is_file($cacheDir .'/'. $thumbname))
2087     {   // We have the thumbnail, just serve it:
2088         header('Content-Type: image/jpeg');
2089         echo file_get_contents($cacheDir .'/'. $thumbname);
2090         return;
2091     }
2092     // We may also serve a blank image (if service did not respond)
2093     $blankname=hash('sha1',$_GET['url']).'.gif';
2094     if (is_file($cacheDir .'/'. $blankname))
2095     {
2096         header('Content-Type: image/gif');
2097         echo file_get_contents($cacheDir .'/'. $blankname);
2098         return;
2099     }
2100
2101     // Otherwise, generate the thumbnail.
2102     $url = $_GET['url'];
2103     $domain = parse_url($url,PHP_URL_HOST);
2104
2105     if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2106     {
2107         // Crude replacement to handle new flickr domain policy (They prefer www. now)
2108         $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2109
2110         // Is this a link to an image, or to a flickr page ?
2111         $imageurl='';
2112         if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2113         {  // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2114             preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2115             if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2116         }
2117         else // This is a flickr page (html)
2118         {
2119             // Get the flickr html page.
2120             list($headers, $content) = get_http_response($url, 20);
2121             if (strpos($headers[0], '200 OK') !== false)
2122             {
2123                 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2124                 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2125                 if (!empty($matches[1])) $imageurl=$matches[1];
2126
2127                 // In albums (and some other pages), the link rel="image_src" is not provided,
2128                 // but flickr provides:
2129                 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2130                 if ($imageurl=='')
2131                 {
2132                     preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2133                     if (!empty($matches[1])) $imageurl=$matches[1];
2134                 }
2135             }
2136         }
2137
2138         if ($imageurl!='')
2139         {   // Let's download the image.
2140             // Image is 240x120, so 10 seconds to download should be enough.
2141             list($headers, $content) = get_http_response($imageurl, 10);
2142             if (strpos($headers[0], '200 OK') !== false) {
2143                 // Save image to cache.
2144                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2145                 header('Content-Type: image/jpeg');
2146                 echo $content;
2147                 return;
2148             }
2149         }
2150     }
2151
2152     elseif ($domain=='vimeo.com' )
2153     {
2154         // This is more complex: we have to perform a HTTP request, then parse the result.
2155         // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2156         $vid = substr(parse_url($url,PHP_URL_PATH),1);
2157         list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2158         if (strpos($headers[0], '200 OK') !== false) {
2159             $t = unserialize($content);
2160             $imageurl = $t[0]['thumbnail_medium'];
2161             // Then we download the image and serve it to our client.
2162             list($headers, $content) = get_http_response($imageurl, 10);
2163             if (strpos($headers[0], '200 OK') !== false) {
2164                 // Save image to cache.
2165                 file_put_contents($cacheDir .'/'. $thumbname, $content);
2166                 header('Content-Type: image/jpeg');
2167                 echo $content;
2168                 return;
2169             }
2170         }
2171     }
2172
2173     elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2174     {
2175         // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2176         // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2177         // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2178         list($headers, $content) = get_http_response($url, 5);
2179         if (strpos($headers[0], '200 OK') !== false) {
2180             // Extract the link to the thumbnail
2181             preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2182             if (!empty($matches[1]))
2183             {   // Let's download the image.
2184                 $imageurl=$matches[1];
2185                 // No control on image size, so wait long enough
2186                 list($headers, $content) = get_http_response($imageurl, 20);
2187                 if (strpos($headers[0], '200 OK') !== false) {
2188                     $filepath = $cacheDir .'/'. $thumbname;
2189                     file_put_contents($filepath, $content); // Save image to cache.
2190                     if (resizeImage($filepath))
2191                     {
2192                         header('Content-Type: image/jpeg');
2193                         echo file_get_contents($filepath);
2194                         return;
2195                     }
2196                 }
2197             }
2198         }
2199     }
2200
2201     elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2202     {
2203         // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2204         // http://xkcd.com/327/
2205         // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2206         list($headers, $content) = get_http_response($url, 5);
2207         if (strpos($headers[0], '200 OK') !== false) {
2208             // Extract the link to the thumbnail
2209             preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2210             if (!empty($matches[1]))
2211             {   // Let's download the image.
2212                 $imageurl=$matches[1];
2213                 // No control on image size, so wait long enough
2214                 list($headers, $content) = get_http_response($imageurl, 20);
2215                 if (strpos($headers[0], '200 OK') !== false) {
2216                     $filepath = $cacheDir.'/'.$thumbname;
2217                     // Save image to cache.
2218                     file_put_contents($filepath, $content);
2219                     if (resizeImage($filepath))
2220                     {
2221                         header('Content-Type: image/jpeg');
2222                         echo file_get_contents($filepath);
2223                         return;
2224                     }
2225                 }
2226             }
2227         }
2228     }
2229
2230     else
2231     {
2232         // For all other domains, we try to download the image and make a thumbnail.
2233         // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2234         list($headers, $content) = get_http_response($url, 30);
2235         if (strpos($headers[0], '200 OK') !== false) {
2236             $filepath = $cacheDir .'/'.$thumbname;
2237             // Save image to cache.
2238             file_put_contents($filepath, $content);
2239             if (resizeImage($filepath))
2240             {
2241                 header('Content-Type: image/jpeg');
2242                 echo file_get_contents($filepath);
2243                 return;
2244             }
2245         }
2246     }
2247
2248
2249     // Otherwise, return an empty image (8x8 transparent gif)
2250     $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2251     // Also put something in cache so that this URL is not requested twice.
2252     file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2253     header('Content-Type: image/gif');
2254     echo $blankgif;
2255 }
2256
2257 // Make a thumbnail of the image (to width: 120 pixels)
2258 // Returns true if success, false otherwise.
2259 function resizeImage($filepath)
2260 {
2261     if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2262
2263     // Trick: some stupid people rename GIF as JPEG... or else.
2264     // So we really try to open each image type whatever the extension is.
2265     $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2266     $im=false;
2267     $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2268     $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2269     $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2270     if (!$im) return false;  // Unable to open image (corrupted or not an image)
2271     $w = imagesx($im);
2272     $h = imagesy($im);
2273     $ystart = 0; $yheight=$h;
2274     if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2275     $nw = 120;   // Desired width
2276     $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2277     // Resize image:
2278     $im2 = imagecreatetruecolor($nw,$nh);
2279     imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2280     imageinterlace($im2,true); // For progressive JPEG.
2281     $tempname=$filepath.'_TEMP.jpg';
2282     imagejpeg($im2, $tempname, 90);
2283     imagedestroy($im);
2284     imagedestroy($im2);
2285     unlink($filepath);
2286     rename($tempname,$filepath);  // Overwrite original picture with thumbnail.
2287     return true;
2288 }
2289
2290 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; }  // Thumbnail generation/cache does not need the link database.
2291 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2292 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2293     $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2294 }
2295
2296 try {
2297     $history = new History($conf->get('resource.history'));
2298 } catch(Exception $e) {
2299     die($e->getMessage());
2300 }
2301
2302 $linkDb = new LinkDB(
2303     $conf->get('resource.datastore'),
2304     isLoggedIn(),
2305     $conf->get('privacy.hide_public_links'),
2306     $conf->get('redirector.url'),
2307     $conf->get('redirector.encode_url')
2308 );
2309
2310 $container = new \Slim\Container();
2311 $container['conf'] = $conf;
2312 $container['plugins'] = $pluginManager;
2313 $container['history'] = $history;
2314 $app = new \Slim\App($container);
2315
2316 // REST API routes
2317 $app->group('/api/v1', function() {
2318     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo')->setName('getInfo');
2319     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks')->setName('getLinks');
2320     $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink')->setName('getLink');
2321     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
2322     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
2323     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
2324     $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
2325 })->add('\Shaarli\Api\ApiMiddleware');
2326
2327 $response = $app->run(true);
2328 // Hack to make Slim and Shaarli router work together:
2329 // If a Slim route isn't found and NOT API call, we call renderPage().
2330 if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
2331     // We use UTF-8 for proper international characters handling.
2332     header('Content-Type: text/html; charset=utf-8');
2333     renderPage($conf, $pluginManager, $linkDb, $history, $sessionManager);
2334 } else {
2335     $app->respond($response);
2336 }