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1 <?php
2 /**
3 * Shaarli v0.8.1 - Shaare your links...
4 *
5 * The personal, minimalist, super-fast, database free, bookmarking service.
6 *
7 * Friendly fork by the Shaarli community:
8 * - https://github.com/shaarli/Shaarli
9 *
10 * Original project by sebsauvage.net:
11 * - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
12 * - https://github.com/sebsauvage/Shaarli
13 *
14 * Licence: http://www.opensource.org/licenses/zlib-license.php
15 *
16 * Requires: PHP 5.3.x
17 */
18
19 // Set 'UTC' as the default timezone if it is not defined in php.ini
20 // See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
21 if (date_default_timezone_get() == '') {
22 date_default_timezone_set('UTC');
23 }
24
25 /*
26 * PHP configuration
27 */
28 define('shaarli_version', '0.8.1');
29
30 // http://server.com/x/shaarli --> /shaarli/
31 define('WEB_PATH', substr($_SERVER['REQUEST_URI'], 0, 1+strrpos($_SERVER['REQUEST_URI'], '/', 0)));
32
33 // High execution time in case of problematic imports/exports.
34 ini_set('max_input_time','60');
35
36 // Try to set max upload file size and read
37 ini_set('memory_limit', '128M');
38 ini_set('post_max_size', '16M');
39 ini_set('upload_max_filesize', '16M');
40
41 // See all error except warnings
42 error_reporting(E_ALL^E_WARNING);
43 // See all errors (for debugging only)
44 //error_reporting(-1);
45
46
47 // 3rd-party libraries
48 if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
49 header('Content-Type: text/plain; charset=utf-8');
50 echo "Error: missing Composer configuration\n\n"
51 ."If you installed Shaarli through Git or using the development branch,\n"
52 ."please refer to the installation documentation to install PHP"
53 ." dependencies using Composer:\n"
54 ."- https://github.com/shaarli/Shaarli/wiki/Server-requirements\n"
55 ."- https://github.com/shaarli/Shaarli/wiki/Download-and-Installation";
56 exit;
57 }
58 require_once 'inc/rain.tpl.class.php';
59 require_once __DIR__ . '/vendor/autoload.php';
60
61 // Shaarli library
62 require_once 'application/ApplicationUtils.php';
63 require_once 'application/Cache.php';
64 require_once 'application/CachedPage.php';
65 require_once 'application/config/ConfigManager.php';
66 require_once 'application/config/ConfigPlugin.php';
67 require_once 'application/FeedBuilder.php';
68 require_once 'application/FileUtils.php';
69 require_once 'application/HttpUtils.php';
70 require_once 'application/Languages.php';
71 require_once 'application/LinkDB.php';
72 require_once 'application/LinkFilter.php';
73 require_once 'application/LinkUtils.php';
74 require_once 'application/NetscapeBookmarkUtils.php';
75 require_once 'application/PageBuilder.php';
76 require_once 'application/TimeZone.php';
77 require_once 'application/Url.php';
78 require_once 'application/Utils.php';
79 require_once 'application/PluginManager.php';
80 require_once 'application/Router.php';
81 require_once 'application/Updater.php';
82
83 // Ensure the PHP version is supported
84 try {
85 ApplicationUtils::checkPHPVersion('5.3', PHP_VERSION);
86 } catch(Exception $exc) {
87 header('Content-Type: text/plain; charset=utf-8');
88 echo $exc->getMessage();
89 exit;
90 }
91
92 // Force cookie path (but do not change lifetime)
93 $cookie = session_get_cookie_params();
94 $cookiedir = '';
95 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
96 $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
97 }
98 // Set default cookie expiration and path.
99 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
100 // Set session parameters on server side.
101 // If the user does not access any page within this time, his/her session is considered expired.
102 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
103 // Use cookies to store session.
104 ini_set('session.use_cookies', 1);
105 // Force cookies for session (phpsessionID forbidden in URL).
106 ini_set('session.use_only_cookies', 1);
107 // Prevent PHP form using sessionID in URL if cookies are disabled.
108 ini_set('session.use_trans_sid', false);
109
110 session_name('shaarli');
111 // Start session if needed (Some server auto-start sessions).
112 if (session_id() == '') {
113 session_start();
114 }
115
116 // Regenerate session ID if invalid or not defined in cookie.
117 if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
118 session_regenerate_id(true);
119 $_COOKIE['shaarli'] = session_id();
120 }
121
122 $conf = new ConfigManager();
123 $conf->setEmpty('general.timezone', date_default_timezone_get());
124 $conf->setEmpty('general.title', 'Shared links on '. escape(index_url($_SERVER)));
125 RainTPL::$tpl_dir = $conf->get('resource.raintpl_tpl'); // template directory
126 RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
127
128 $pluginManager = new PluginManager($conf);
129 $pluginManager->load($conf->get('general.enabled_plugins'));
130
131 date_default_timezone_set($conf->get('general.timezone', 'UTC'));
132
133 ob_start(); // Output buffering for the page cache.
134
135 // In case stupid admin has left magic_quotes enabled in php.ini:
136 if (get_magic_quotes_gpc())
137 {
138 function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
139 $_POST = array_map('stripslashes_deep', $_POST);
140 $_GET = array_map('stripslashes_deep', $_GET);
141 $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
142 }
143
144 // Prevent caching on client side or proxy: (yes, it's ugly)
145 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
146 header("Cache-Control: no-store, no-cache, must-revalidate");
147 header("Cache-Control: post-check=0, pre-check=0", false);
148 header("Pragma: no-cache");
149
150 if (! is_file($conf->getConfigFileExt())) {
151 // Ensure Shaarli has proper access to its resources
152 $errors = ApplicationUtils::checkResourcePermissions($conf);
153
154 if ($errors != array()) {
155 $message = '<p>Insufficient permissions:</p><ul>';
156
157 foreach ($errors as $error) {
158 $message .= '<li>'.$error.'</li>';
159 }
160 $message .= '</ul>';
161
162 header('Content-Type: text/html; charset=utf-8');
163 echo $message;
164 exit;
165 }
166
167 // Display the installation form if no existing config is found
168 install($conf);
169 }
170
171 // a token depending of deployment salt, user password, and the current ip
172 define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
173
174 // Sniff browser language and set date format accordingly.
175 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
176 autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
177 }
178 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
179
180 /**
181 * Checking session state (i.e. is the user still logged in)
182 *
183 * @param ConfigManager $conf The configuration manager.
184 *
185 * @return bool: true if the user is logged in, false otherwise.
186 */
187 function setup_login_state($conf)
188 {
189 if ($conf->get('security.open_shaarli')) {
190 return true;
191 }
192 $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
193 $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
194 if (! $conf->exists('credentials.login')) {
195 $userIsLoggedIn = false; // Shaarli is not configured yet.
196 $loginFailure = true;
197 }
198 if (isset($_COOKIE['shaarli_staySignedIn']) &&
199 $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
200 !$loginFailure)
201 {
202 fillSessionInfo($conf);
203 $userIsLoggedIn = true;
204 }
205 // If session does not exist on server side, or IP address has changed, or session has expired, logout.
206 if (empty($_SESSION['uid'])
207 || ($conf->get('security.session_protection_disabled') == false && $_SESSION['ip'] != allIPs())
208 || time() >= $_SESSION['expires_on'])
209 {
210 logout();
211 $userIsLoggedIn = false;
212 $loginFailure = true;
213 }
214 if (!empty($_SESSION['longlastingsession'])) {
215 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
216 }
217 else {
218 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
219 }
220 if (!$loginFailure) {
221 $userIsLoggedIn = true;
222 }
223
224 return $userIsLoggedIn;
225 }
226 $userIsLoggedIn = setup_login_state($conf);
227
228 /**
229 * PubSubHubbub protocol support (if enabled) [UNTESTED]
230 * (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
231 *
232 * @param ConfigManager $conf Configuration Manager instance.
233 */
234 function pubsubhub($conf)
235 {
236 $pshUrl = $conf->get('config.PUBSUBHUB_URL');
237 if (!empty($pshUrl))
238 {
239 include_once './publisher.php';
240 $p = new Publisher($pshUrl);
241 $topic_url = array (
242 index_url($_SERVER).'?do=atom',
243 index_url($_SERVER).'?do=rss'
244 );
245 $p->publish_update($topic_url);
246 }
247 }
248
249 // ------------------------------------------------------------------------------------------
250 // Session management
251
252 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
253 function allIPs()
254 {
255 $ip = $_SERVER['REMOTE_ADDR'];
256 // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
257 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
258 if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
259 return $ip;
260 }
261
262 /**
263 * Load user session.
264 *
265 * @param ConfigManager $conf Configuration Manager instance.
266 */
267 function fillSessionInfo($conf)
268 {
269 $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
270 $_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked.
271 $_SESSION['username']= $conf->get('credentials.login');
272 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
273 }
274
275 /**
276 * Check that user/password is correct.
277 *
278 * @param string $login Username
279 * @param string $password User password
280 * @param ConfigManager $conf Configuration Manager instance.
281 *
282 * @return bool: authentication successful or not.
283 */
284 function check_auth($login, $password, $conf)
285 {
286 $hash = sha1($password . $login . $conf->get('credentials.salt'));
287 if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
288 { // Login/password is correct.
289 fillSessionInfo($conf);
290 logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
291 return true;
292 }
293 logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
294 return false;
295 }
296
297 // Returns true if the user is logged in.
298 function isLoggedIn()
299 {
300 global $userIsLoggedIn;
301 return $userIsLoggedIn;
302 }
303
304 // Force logout.
305 function logout() {
306 if (isset($_SESSION)) {
307 unset($_SESSION['uid']);
308 unset($_SESSION['ip']);
309 unset($_SESSION['username']);
310 unset($_SESSION['privateonly']);
311 }
312 setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
313 }
314
315
316 // ------------------------------------------------------------------------------------------
317 // Brute force protection system
318 // Several consecutive failed logins will ban the IP address for 30 minutes.
319 if (!is_file($conf->get('resource.ban_file', 'data/ipbans.php'))) {
320 // FIXME! globals
321 file_put_contents(
322 $conf->get('resource.ban_file', 'data/ipbans.php'),
323 "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
324 );
325 }
326 include $conf->get('resource.ban_file', 'data/ipbans.php');
327 /**
328 * Signal a failed login. Will ban the IP if too many failures:
329 *
330 * @param ConfigManager $conf Configuration Manager instance.
331 */
332 function ban_loginFailed($conf)
333 {
334 $ip = $_SERVER['REMOTE_ADDR'];
335 $trusted = $conf->get('security.trusted_proxies', array());
336 if (in_array($ip, $trusted)) {
337 $ip = getIpAddressFromProxy($_SERVER, $trusted);
338 if (!$ip) {
339 return;
340 }
341 }
342 $gb = $GLOBALS['IPBANS'];
343 if (! isset($gb['FAILURES'][$ip])) {
344 $gb['FAILURES'][$ip]=0;
345 }
346 $gb['FAILURES'][$ip]++;
347 if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
348 {
349 $gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
350 logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
351 }
352 $GLOBALS['IPBANS'] = $gb;
353 file_put_contents(
354 $conf->get('resource.ban_file', 'data/ipbans.php'),
355 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
356 );
357 }
358
359 /**
360 * Signals a successful login. Resets failed login counter.
361 *
362 * @param ConfigManager $conf Configuration Manager instance.
363 */
364 function ban_loginOk($conf)
365 {
366 $ip = $_SERVER['REMOTE_ADDR'];
367 $gb = $GLOBALS['IPBANS'];
368 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
369 $GLOBALS['IPBANS'] = $gb;
370 file_put_contents(
371 $conf->get('resource.ban_file', 'data/ipbans.php'),
372 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
373 );
374 }
375
376 /**
377 * Checks if the user CAN login. If 'true', the user can try to login.
378 *
379 * @param ConfigManager $conf Configuration Manager instance.
380 *
381 * @return bool: true if the user is allowed to login.
382 */
383 function ban_canLogin($conf)
384 {
385 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
386 if (isset($gb['BANS'][$ip]))
387 {
388 // User is banned. Check if the ban has expired:
389 if ($gb['BANS'][$ip]<=time())
390 { // Ban expired, user can try to login again.
391 logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
392 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
393 file_put_contents(
394 $conf->get('resource.ban_file', 'data/ipbans.php'),
395 "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
396 );
397 return true; // Ban has expired, user can login.
398 }
399 return false; // User is banned.
400 }
401 return true; // User is not banned.
402 }
403
404 // ------------------------------------------------------------------------------------------
405 // Process login form: Check if login/password is correct.
406 if (isset($_POST['login']))
407 {
408 if (!ban_canLogin($conf)) die('I said: NO. You are banned for the moment. Go away.');
409 if (isset($_POST['password'])
410 && tokenOk($_POST['token'])
411 && (check_auth($_POST['login'], $_POST['password'], $conf))
412 ) { // Login/password is OK.
413 ban_loginOk($conf);
414 // If user wants to keep the session cookie even after the browser closes:
415 if (!empty($_POST['longlastingsession']))
416 {
417 setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
418 $_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
419 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
420
421 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
422 session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
423 // Note: Never forget the trailing slash on the cookie path!
424 session_regenerate_id(true); // Send cookie with new expiration date to browser.
425 }
426 else // Standard session expiration (=when browser closes)
427 {
428 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
429 session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
430 session_regenerate_id(true);
431 }
432
433 // Optional redirect after login:
434 if (isset($_GET['post'])) {
435 $uri = '?post='. urlencode($_GET['post']);
436 foreach (array('description', 'source', 'title') as $param) {
437 if (!empty($_GET[$param])) {
438 $uri .= '&'.$param.'='.urlencode($_GET[$param]);
439 }
440 }
441 header('Location: '. $uri);
442 exit;
443 }
444
445 if (isset($_GET['edit_link'])) {
446 header('Location: ?edit_link='. escape($_GET['edit_link']));
447 exit;
448 }
449
450 if (isset($_POST['returnurl'])) {
451 // Prevent loops over login screen.
452 if (strpos($_POST['returnurl'], 'do=login') === false) {
453 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
454 exit;
455 }
456 }
457 header('Location: ?'); exit;
458 }
459 else
460 {
461 ban_loginFailed($conf);
462 $redir = '&username='. $_POST['login'];
463 if (isset($_GET['post'])) {
464 $redir .= '&post=' . urlencode($_GET['post']);
465 foreach (array('description', 'source', 'title') as $param) {
466 if (!empty($_GET[$param])) {
467 $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
468 }
469 }
470 }
471 echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
472 exit;
473 }
474 }
475
476 // ------------------------------------------------------------------------------------------
477 // Misc utility functions:
478
479 // Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes.
480 function return_bytes($val)
481 {
482 $val = trim($val); $last=strtolower($val[strlen($val)-1]);
483 switch($last)
484 {
485 case 'g': $val *= 1024;
486 case 'm': $val *= 1024;
487 case 'k': $val *= 1024;
488 }
489 return $val;
490 }
491
492 // Try to determine max file size for uploads (POST).
493 // Returns an integer (in bytes)
494 function getMaxFileSize()
495 {
496 $size1 = return_bytes(ini_get('post_max_size'));
497 $size2 = return_bytes(ini_get('upload_max_filesize'));
498 // Return the smaller of two:
499 $maxsize = min($size1,$size2);
500 // FIXME: Then convert back to readable notations ? (e.g. 2M instead of 2000000)
501 return $maxsize;
502 }
503
504 // ------------------------------------------------------------------------------------------
505 // Token management for XSRF protection
506 // Token should be used in any form which acts on data (create,update,delete,import...).
507 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
508
509 /**
510 * Returns a token.
511 *
512 * @param ConfigManager $conf Configuration Manager instance.
513 *
514 * @return string token.
515 */
516 function getToken($conf)
517 {
518 $rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt')); // We generate a random string.
519 $_SESSION['tokens'][$rnd]=1; // Store it on the server side.
520 return $rnd;
521 }
522
523 // Tells if a token is OK. Using this function will destroy the token.
524 // true=token is OK.
525 function tokenOk($token)
526 {
527 if (isset($_SESSION['tokens'][$token]))
528 {
529 unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
530 return true; // Token is OK.
531 }
532 return false; // Wrong token, or already used.
533 }
534
535 /**
536 * Daily RSS feed: 1 RSS entry per day giving all the links on that day.
537 * Gives the last 7 days (which have links).
538 * This RSS feed cannot be filtered.
539 *
540 * @param ConfigManager $conf Configuration Manager instance.
541 */
542 function showDailyRSS($conf) {
543 // Cache system
544 $query = $_SERVER['QUERY_STRING'];
545 $cache = new CachedPage(
546 $conf->get('config.PAGE_CACHE'),
547 page_url($_SERVER),
548 startsWith($query,'do=dailyrss') && !isLoggedIn()
549 );
550 $cached = $cache->cachedVersion();
551 if (!empty($cached)) {
552 echo $cached;
553 exit;
554 }
555
556 // If cached was not found (or not usable), then read the database and build the response:
557 // Read links from database (and filter private links if used it not logged in).
558 $LINKSDB = new LinkDB(
559 $conf->get('resource.datastore'),
560 isLoggedIn(),
561 $conf->get('privacy.hide_public_links'),
562 $conf->get('redirector.url'),
563 $conf->get('redirector.encode_url')
564 );
565
566 /* Some Shaarlies may have very few links, so we need to look
567 back in time until we have enough days ($nb_of_days).
568 */
569 $nb_of_days = 7; // We take 7 days.
570 $today = date('Ymd');
571 $days = array();
572
573 foreach ($LINKSDB as $link) {
574 $day = $link['created']->format('Ymd'); // Extract day (without time)
575 if (strcmp($day, $today) < 0) {
576 if (empty($days[$day])) {
577 $days[$day] = array();
578 }
579 $days[$day][] = $link;
580 }
581
582 if (count($days) > $nb_of_days) {
583 break; // Have we collected enough days?
584 }
585 }
586
587 // Build the RSS feed.
588 header('Content-Type: application/rss+xml; charset=utf-8');
589 $pageaddr = escape(index_url($_SERVER));
590 echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
591 echo '<channel>';
592 echo '<title>Daily - '. $conf->get('general.title') . '</title>';
593 echo '<link>'. $pageaddr .'</link>';
594 echo '<description>Daily shared links</description>';
595 echo '<language>en-en</language>';
596 echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
597
598 // For each day.
599 foreach ($days as $day => $links) {
600 $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
601 $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page.
602
603 // We pre-format some fields for proper output.
604 foreach ($links as &$link) {
605 $link['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
606 $link['thumbnail'] = thumbnail($conf, $link['url']);
607 $link['timestamp'] = $link['created']->getTimestamp();
608 if (startsWith($link['url'], '?')) {
609 $link['url'] = index_url($_SERVER) . $link['url']; // make permalink URL absolute
610 }
611 }
612
613 // Then build the HTML for this day:
614 $tpl = new RainTPL;
615 $tpl->assign('title', $conf->get('general.title'));
616 $tpl->assign('daydate', $dayDate->getTimestamp());
617 $tpl->assign('absurl', $absurl);
618 $tpl->assign('links', $links);
619 $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
620 $tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
621 $html = $tpl->draw('dailyrss', $return_string=true);
622
623 echo $html . PHP_EOL;
624 }
625 echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
626
627 $cache->cache(ob_get_contents());
628 ob_end_flush();
629 exit;
630 }
631
632 /**
633 * Show the 'Daily' page.
634 *
635 * @param PageBuilder $pageBuilder Template engine wrapper.
636 * @param LinkDB $LINKSDB LinkDB instance.
637 * @param ConfigManager $conf Configuration Manager instance.
638 * @param PluginManager $pluginManager Plugin Manager instane.
639 */
640 function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
641 {
642 $day=date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
643 if (isset($_GET['day'])) $day=$_GET['day'];
644
645 $days = $LINKSDB->days();
646 $i = array_search($day,$days);
647 if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
648 $previousday='';
649 $nextday='';
650 if ($i!==false)
651 {
652 if ($i>=1) $previousday=$days[$i-1];
653 if ($i<count($days)-1) $nextday=$days[$i+1];
654 }
655
656 try {
657 $linksToDisplay = $LINKSDB->filterDay($day);
658 } catch (Exception $exc) {
659 error_log($exc);
660 $linksToDisplay = array();
661 }
662
663 // We pre-format some fields for proper output.
664 foreach($linksToDisplay as $key=>$link)
665 {
666
667 $taglist = explode(' ',$link['tags']);
668 uasort($taglist, 'strcasecmp');
669 $linksToDisplay[$key]['taglist']=$taglist;
670 $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $conf->get('redirector.url'));
671 $linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
672 $linksToDisplay[$key]['timestamp'] = $link['created']->getTimestamp();
673 }
674
675 /* We need to spread the articles on 3 columns.
676 I did not want to use a JavaScript lib like http://masonry.desandro.com/
677 so I manually spread entries with a simple method: I roughly evaluate the
678 height of a div according to title and description length.
679 */
680 $columns=array(array(),array(),array()); // Entries to display, for each column.
681 $fill=array(0,0,0); // Rough estimate of columns fill.
682 foreach($linksToDisplay as $key=>$link)
683 {
684 // Roughly estimate length of entry (by counting characters)
685 // Title: 30 chars = 1 line. 1 line is 30 pixels height.
686 // Description: 836 characters gives roughly 342 pixel height.
687 // This is not perfect, but it's usually OK.
688 $length=strlen($link['title'])+(342*strlen($link['description']))/836;
689 if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
690 // Then put in column which is the less filled:
691 $smallest=min($fill); // find smallest value in array.
692 $index=array_search($smallest,$fill); // find index of this smallest value.
693 array_push($columns[$index],$link); // Put entry in this column.
694 $fill[$index]+=$length;
695 }
696
697 $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
698 $data = array(
699 'linksToDisplay' => $linksToDisplay,
700 'cols' => $columns,
701 'day' => $dayDate->getTimestamp(),
702 'previousday' => $previousday,
703 'nextday' => $nextday,
704 );
705
706 $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
707
708 foreach ($data as $key => $value) {
709 $pageBuilder->assign($key, $value);
710 }
711
712 $pageBuilder->renderPage('daily');
713 exit;
714 }
715
716 /**
717 * Renders the linklist
718 *
719 * @param pageBuilder $PAGE pageBuilder instance.
720 * @param LinkDB $LINKSDB LinkDB instance.
721 * @param ConfigManager $conf Configuration Manager instance.
722 * @param PluginManager $pluginManager Plugin Manager instance.
723 */
724 function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
725 buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
726 $PAGE->renderPage('linklist');
727 }
728
729 /**
730 * Render HTML page (according to URL parameters and user rights)
731 *
732 * @param ConfigManager $conf Configuration Manager instance.
733 * @param PluginManager $pluginManager Plugin Manager instance,
734 */
735 function renderPage($conf, $pluginManager)
736 {
737 $LINKSDB = new LinkDB(
738 $conf->get('resource.datastore'),
739 isLoggedIn(),
740 $conf->get('privacy.hide_public_links'),
741 $conf->get('redirector.url'),
742 $conf->get('redirector.encode_url')
743 );
744
745 $updater = new Updater(
746 read_updates_file($conf->get('resource.updates')),
747 $LINKSDB,
748 $conf,
749 isLoggedIn()
750 );
751 try {
752 $newUpdates = $updater->update();
753 if (! empty($newUpdates)) {
754 write_updates_file(
755 $conf->get('resource.updates'),
756 $updater->getDoneUpdates()
757 );
758 }
759 }
760 catch(Exception $e) {
761 die($e->getMessage());
762 }
763
764 $PAGE = new PageBuilder($conf);
765 $PAGE->assign('linkcount', count($LINKSDB));
766 $PAGE->assign('privateLinkcount', count_private($LINKSDB));
767 $PAGE->assign('plugin_errors', $pluginManager->getErrors());
768
769 // Determine which page will be rendered.
770 $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
771 $targetPage = Router::findPage($query, $_GET, isLoggedIn());
772
773 // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
774 // Then assign generated data to RainTPL.
775 $common_hooks = array(
776 'includes',
777 'header',
778 'footer',
779 );
780
781 foreach($common_hooks as $name) {
782 $plugin_data = array();
783 $pluginManager->executeHooks('render_' . $name, $plugin_data,
784 array(
785 'target' => $targetPage,
786 'loggedin' => isLoggedIn()
787 )
788 );
789 $PAGE->assign('plugins_' . $name, $plugin_data);
790 }
791
792 // -------- Display login form.
793 if ($targetPage == Router::$PAGE_LOGIN)
794 {
795 if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; } // No need to login for open Shaarli
796 if (isset($_GET['username'])) {
797 $PAGE->assign('username', escape($_GET['username']));
798 }
799 $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
800 $PAGE->renderPage('loginform');
801 exit;
802 }
803 // -------- User wants to logout.
804 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
805 {
806 invalidateCaches($conf->get('resource.page_cache'));
807 logout();
808 header('Location: ?');
809 exit;
810 }
811
812 // -------- Picture wall
813 if ($targetPage == Router::$PAGE_PICWALL)
814 {
815 // Optionally filter the results:
816 $links = $LINKSDB->filterSearch($_GET);
817 $linksToDisplay = array();
818
819 // Get only links which have a thumbnail.
820 foreach($links as $link)
821 {
822 $permalink='?'.$link['shorturl'];
823 $thumb=lazyThumbnail($conf, $link['url'],$permalink);
824 if ($thumb!='') // Only output links which have a thumbnail.
825 {
826 $link['thumbnail']=$thumb; // Thumbnail HTML code.
827 $linksToDisplay[]=$link; // Add to array.
828 }
829 }
830
831 $data = array(
832 'linksToDisplay' => $linksToDisplay,
833 );
834 $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
835
836 foreach ($data as $key => $value) {
837 $PAGE->assign($key, $value);
838 }
839
840 $PAGE->renderPage('picwall');
841 exit;
842 }
843
844 // -------- Tag cloud
845 if ($targetPage == Router::$PAGE_TAGCLOUD)
846 {
847 $tags= $LINKSDB->allTags();
848
849 // We sort tags alphabetically, then choose a font size according to count.
850 // First, find max value.
851 $maxcount = 0;
852 foreach ($tags as $value) {
853 $maxcount = max($maxcount, $value);
854 }
855
856 // Sort tags alphabetically: case insensitive, support locale if available.
857 uksort($tags, function($a, $b) {
858 // Collator is part of PHP intl.
859 if (class_exists('Collator')) {
860 $c = new Collator(setlocale(LC_COLLATE, 0));
861 if (!intl_is_failure(intl_get_error_code())) {
862 return $c->compare($a, $b);
863 }
864 }
865 return strcasecmp($a, $b);
866 });
867
868 $tagList = array();
869 foreach($tags as $key => $value) {
870 // Tag font size scaling:
871 // default 15 and 30 logarithm bases affect scaling,
872 // 22 and 6 are arbitrary font sizes for max and min sizes.
873 $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
874 $tagList[$key] = array(
875 'count' => $value,
876 'size' => number_format($size, 2, '.', ''),
877 );
878 }
879
880 $data = array(
881 'tags' => $tagList,
882 );
883 $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
884
885 foreach ($data as $key => $value) {
886 $PAGE->assign($key, $value);
887 }
888
889 $PAGE->renderPage('tagcloud');
890 exit;
891 }
892
893 // Daily page.
894 if ($targetPage == Router::$PAGE_DAILY) {
895 showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
896 }
897
898 // ATOM and RSS feed.
899 if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
900 $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
901 header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
902
903 // Cache system
904 $query = $_SERVER['QUERY_STRING'];
905 $cache = new CachedPage(
906 $conf->get('resource.page_cache'),
907 page_url($_SERVER),
908 startsWith($query,'do='. $targetPage) && !isLoggedIn()
909 );
910 $cached = $cache->cachedVersion();
911 if (!empty($cached)) {
912 echo $cached;
913 exit;
914 }
915
916 // Generate data.
917 $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
918 $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
919 $feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
920 $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
921 $pshUrl = $conf->get('config.PUBSUBHUB_URL');
922 if (!empty($pshUrl)) {
923 $feedGenerator->setPubsubhubUrl($pshUrl);
924 }
925 $data = $feedGenerator->buildData();
926
927 // Process plugin hook.
928 $pluginManager->executeHooks('render_feed', $data, array(
929 'loggedin' => isLoggedIn(),
930 'target' => $targetPage,
931 ));
932
933 // Render the template.
934 $PAGE->assignAll($data);
935 $PAGE->renderPage('feed.'. $feedType);
936 $cache->cache(ob_get_contents());
937 ob_end_flush();
938 exit;
939 }
940
941 // Display openseach plugin (XML)
942 if ($targetPage == Router::$PAGE_OPENSEARCH) {
943 header('Content-Type: application/xml; charset=utf-8');
944 $PAGE->assign('serverurl', index_url($_SERVER));
945 $PAGE->renderPage('opensearch');
946 exit;
947 }
948
949 // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
950 if (isset($_GET['addtag']))
951 {
952 // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
953 if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
954 parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
955
956 // Prevent redirection loop
957 if (isset($params['addtag'])) {
958 unset($params['addtag']);
959 }
960
961 // Check if this tag is already in the search query and ignore it if it is.
962 // Each tag is always separated by a space
963 if (isset($params['searchtags'])) {
964 $current_tags = explode(' ', $params['searchtags']);
965 } else {
966 $current_tags = array();
967 }
968 $addtag = true;
969 foreach ($current_tags as $value) {
970 if ($value === $_GET['addtag']) {
971 $addtag = false;
972 break;
973 }
974 }
975 // Append the tag if necessary
976 if (empty($params['searchtags'])) {
977 $params['searchtags'] = trim($_GET['addtag']);
978 }
979 else if ($addtag) {
980 $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
981 }
982
983 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
984 header('Location: ?'.http_build_query($params));
985 exit;
986 }
987
988 // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
989 if (isset($_GET['removetag'])) {
990 // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
991 if (empty($_SERVER['HTTP_REFERER'])) {
992 header('Location: ?');
993 exit;
994 }
995
996 // In case browser does not send HTTP_REFERER
997 parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
998
999 // Prevent redirection loop
1000 if (isset($params['removetag'])) {
1001 unset($params['removetag']);
1002 }
1003
1004 if (isset($params['searchtags'])) {
1005 $tags = explode(' ', $params['searchtags']);
1006 // Remove value from array $tags.
1007 $tags = array_diff($tags, array($_GET['removetag']));
1008 $params['searchtags'] = implode(' ',$tags);
1009
1010 if (empty($params['searchtags'])) {
1011 unset($params['searchtags']);
1012 }
1013
1014 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1015 }
1016 header('Location: ?'.http_build_query($params));
1017 exit;
1018 }
1019
1020 // -------- User wants to change the number of links per page (linksperpage=...)
1021 if (isset($_GET['linksperpage'])) {
1022 if (is_numeric($_GET['linksperpage'])) {
1023 $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1024 }
1025
1026 header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage')));
1027 exit;
1028 }
1029
1030 // -------- User wants to see only private links (toggle)
1031 if (isset($_GET['privateonly'])) {
1032 if (empty($_SESSION['privateonly'])) {
1033 $_SESSION['privateonly'] = 1; // See only private links
1034 } else {
1035 unset($_SESSION['privateonly']); // See all links
1036 }
1037
1038 header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly')));
1039 exit;
1040 }
1041
1042 // -------- Handle other actions allowed for non-logged in users:
1043 if (!isLoggedIn())
1044 {
1045 // User tries to post new link but is not logged in:
1046 // Show login screen, then redirect to ?post=...
1047 if (isset($_GET['post']))
1048 {
1049 header('Location: ?do=login&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
1050 exit;
1051 }
1052
1053 showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1054 if (isset($_GET['edit_link'])) {
1055 header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1056 exit;
1057 }
1058
1059 exit; // Never remove this one! All operations below are reserved for logged in user.
1060 }
1061
1062 // -------- All other functions are reserved for the registered user:
1063
1064 // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1065 if ($targetPage == Router::$PAGE_TOOLS)
1066 {
1067 $data = array(
1068 'pageabsaddr' => index_url($_SERVER),
1069 'sslenabled' => !empty($_SERVER['HTTPS'])
1070 );
1071 $pluginManager->executeHooks('render_tools', $data);
1072
1073 foreach ($data as $key => $value) {
1074 $PAGE->assign($key, $value);
1075 }
1076
1077 $PAGE->renderPage('tools');
1078 exit;
1079 }
1080
1081 // -------- User wants to change his/her password.
1082 if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1083 {
1084 if ($conf->get('security.open_shaarli')) {
1085 die('You are not supposed to change a password on an Open Shaarli.');
1086 }
1087
1088 if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1089 {
1090 if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1091
1092 // Make sure old password is correct.
1093 $oldhash = sha1($_POST['oldpassword'].$conf->get('credentials.login').$conf->get('credentials.salt'));
1094 if ($oldhash!= $conf->get('credentials.hash')) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1095 // Save new password
1096 // Salt renders rainbow-tables attacks useless.
1097 $conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
1098 $conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
1099 try {
1100 $conf->write(isLoggedIn());
1101 }
1102 catch(Exception $e) {
1103 error_log(
1104 'ERROR while writing config file after changing password.' . PHP_EOL .
1105 $e->getMessage()
1106 );
1107
1108 // TODO: do not handle exceptions/errors in JS.
1109 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1110 exit;
1111 }
1112 echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1113 exit;
1114 }
1115 else // show the change password form.
1116 {
1117 $PAGE->renderPage('changepassword');
1118 exit;
1119 }
1120 }
1121
1122 // -------- User wants to change configuration
1123 if ($targetPage == Router::$PAGE_CONFIGURE)
1124 {
1125 if (!empty($_POST['title']) )
1126 {
1127 if (!tokenOk($_POST['token'])) {
1128 die('Wrong token.'); // Go away!
1129 }
1130 $tz = 'UTC';
1131 if (!empty($_POST['continent']) && !empty($_POST['city'])
1132 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1133 ) {
1134 $tz = $_POST['continent'] . '/' . $_POST['city'];
1135 }
1136 $conf->set('general.timezone', $tz);
1137 $conf->set('general.title', escape($_POST['title']));
1138 $conf->set('general.header_link', escape($_POST['titleLink']));
1139 $conf->set('redirector.url', escape($_POST['redirector']));
1140 $conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
1141 $conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
1142 $conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
1143 $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1144 $conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
1145 try {
1146 $conf->write(isLoggedIn());
1147 }
1148 catch(Exception $e) {
1149 error_log(
1150 'ERROR while writing config file after configuration update.' . PHP_EOL .
1151 $e->getMessage()
1152 );
1153
1154 // TODO: do not handle exceptions/errors in JS.
1155 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=configure\';</script>';
1156 exit;
1157 }
1158 echo '<script>alert("Configuration was saved.");document.location=\'?do=configure\';</script>';
1159 exit;
1160 }
1161 else // Show the configuration form.
1162 {
1163 $PAGE->assign('title', $conf->get('general.title'));
1164 $PAGE->assign('redirector', $conf->get('redirector.url'));
1165 list($timezone_form, $timezone_js) = generateTimeZoneForm($conf->get('general.timezone'));
1166 $PAGE->assign('timezone_form', $timezone_form);
1167 $PAGE->assign('timezone_js',$timezone_js);
1168 $PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
1169 $PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
1170 $PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
1171 $PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
1172 $PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
1173 $PAGE->renderPage('configure');
1174 exit;
1175 }
1176 }
1177
1178 // -------- User wants to rename a tag or delete it
1179 if ($targetPage == Router::$PAGE_CHANGETAG)
1180 {
1181 if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1182 $PAGE->assign('tags', $LINKSDB->allTags());
1183 $PAGE->renderPage('changetag');
1184 exit;
1185 }
1186
1187 if (!tokenOk($_POST['token'])) {
1188 die('Wrong token.');
1189 }
1190
1191 // Delete a tag:
1192 if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
1193 $needle = trim($_POST['fromtag']);
1194 // True for case-sensitive tag search.
1195 $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1196 foreach($linksToAlter as $key=>$value)
1197 {
1198 $tags = explode(' ',trim($value['tags']));
1199 unset($tags[array_search($needle,$tags)]); // Remove tag.
1200 $value['tags']=trim(implode(' ',$tags));
1201 $LINKSDB[$key]=$value;
1202 }
1203 $LINKSDB->save($conf->get('resource.page_cache'));
1204 echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
1205 exit;
1206 }
1207
1208 // Rename a tag:
1209 if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
1210 $needle = trim($_POST['fromtag']);
1211 // True for case-sensitive tag search.
1212 $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1213 foreach($linksToAlter as $key=>$value)
1214 {
1215 $tags = explode(' ',trim($value['tags']));
1216 $tags[array_search($needle,$tags)] = trim($_POST['totag']); // Replace tags value.
1217 $value['tags']=trim(implode(' ',$tags));
1218 $LINKSDB[$key]=$value;
1219 }
1220 $LINKSDB->save($conf->get('resource.page_cache')); // Save to disk.
1221 echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>';
1222 exit;
1223 }
1224 }
1225
1226 // -------- User wants to add a link without using the bookmarklet: Show form.
1227 if ($targetPage == Router::$PAGE_ADDLINK)
1228 {
1229 $PAGE->renderPage('addlink');
1230 exit;
1231 }
1232
1233 // -------- User clicked the "Save" button when editing a link: Save link to database.
1234 if (isset($_POST['save_edit']))
1235 {
1236 // Go away!
1237 if (! tokenOk($_POST['token'])) {
1238 die('Wrong token.');
1239 }
1240
1241 // lf_id should only be present if the link exists.
1242 $id = !empty($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : $LINKSDB->getNextId();
1243 // Linkdate is kept here to:
1244 // - use the same permalink for notes as they're displayed when creating them
1245 // - let users hack creation date of their posts
1246 // See: https://github.com/shaarli/Shaarli/wiki/Datastore-hacks#changing-the-timestamp-for-a-link
1247 $linkdate = escape($_POST['lf_linkdate']);
1248 if (isset($LINKSDB[$id])) {
1249 // Edit
1250 $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1251 $updated = new DateTime();
1252 $shortUrl = $LINKSDB[$id]['shorturl'];
1253 } else {
1254 // New link
1255 $created = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $linkdate);
1256 $updated = null;
1257 $shortUrl = link_small_hash($created, $id);
1258 }
1259
1260 // Remove multiple spaces.
1261 $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1262 // Remove first '-' char in tags.
1263 $tags = preg_replace('/(^| )\-/', '$1', $tags);
1264 // Remove duplicates.
1265 $tags = implode(' ', array_unique(explode(' ', $tags)));
1266
1267 $url = trim($_POST['lf_url']);
1268 if (! startsWith($url, 'http:') && ! startsWith($url, 'https:')
1269 && ! startsWith($url, 'ftp:') && ! startsWith($url, 'magnet:')
1270 && ! startsWith($url, '?') && ! startsWith($url, 'javascript:')
1271 ) {
1272 $url = 'http://' . $url;
1273 }
1274
1275 $link = array(
1276 'id' => $id,
1277 'title' => trim($_POST['lf_title']),
1278 'url' => $url,
1279 'description' => $_POST['lf_description'],
1280 'private' => (isset($_POST['lf_private']) ? 1 : 0),
1281 'created' => $created,
1282 'updated' => $updated,
1283 'tags' => str_replace(',', ' ', $tags),
1284 'shorturl' => $shortUrl,
1285 );
1286
1287 // If title is empty, use the URL as title.
1288 if ($link['title'] == '') {
1289 $link['title'] = $link['url'];
1290 }
1291
1292 $pluginManager->executeHooks('save_link', $link);
1293
1294 $LINKSDB[$id] = $link;
1295 $LINKSDB->save($conf->get('resource.page_cache'));
1296 pubsubhub($conf);
1297
1298 // If we are called from the bookmarklet, we must close the popup:
1299 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1300 echo '<script>self.close();</script>';
1301 exit;
1302 }
1303
1304 $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1305 $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1306 // Scroll to the link which has been edited.
1307 $location .= '#' . $link['shorturl'];
1308 // After saving the link, redirect to the page the user was on.
1309 header('Location: '. $location);
1310 exit;
1311 }
1312
1313 // -------- User clicked the "Cancel" button when editing a link.
1314 if (isset($_POST['cancel_edit']))
1315 {
1316 // If we are called from the bookmarklet, we must close the popup:
1317 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1318 $link = $LINKSDB[(int) escape($_POST['lf_id'])];
1319 $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1320 // Scroll to the link which has been edited.
1321 $returnurl .= '#'. $link['shorturl'];
1322 $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1323 header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1324 exit;
1325 }
1326
1327 // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1328 if (isset($_POST['delete_link']))
1329 {
1330 if (!tokenOk($_POST['token'])) die('Wrong token.');
1331
1332 // We do not need to ask for confirmation:
1333 // - confirmation is handled by JavaScript
1334 // - we are protected from XSRF by the token.
1335
1336 // FIXME! We keep `lf_linkdate` for consistency before a proper API. To be removed.
1337 $id = isset($_POST['lf_id']) ? intval(escape($_POST['lf_id'])) : intval(escape($_POST['lf_linkdate']));
1338
1339 $pluginManager->executeHooks('delete_link', $LINKSDB[$id]);
1340
1341 unset($LINKSDB[$id]);
1342 $LINKSDB->save('resource.page_cache'); // save to disk
1343
1344 // If we are called from the bookmarklet, we must close the popup:
1345 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1346 // Pick where we're going to redirect
1347 // =============================================================
1348 // Basically, we can't redirect to where we were previously if it was a permalink
1349 // or an edit_link, because it would 404.
1350 // Cases:
1351 // - / : nothing in $_GET, redirect to self
1352 // - /?page : redirect to self
1353 // - /?searchterm : redirect to self (there might be other links)
1354 // - /?searchtags : redirect to self
1355 // - /permalink : redirect to / (the link does not exist anymore)
1356 // - /?edit_link : redirect to / (the link does not exist anymore)
1357 // PHP treats the permalink as a $_GET variable, so we need to check if every condition for self
1358 // redirect is not satisfied, and only then redirect to /
1359 $location = "?";
1360 // Self redirection
1361 if (count($_GET) == 0
1362 || isset($_GET['page'])
1363 || isset($_GET['searchterm'])
1364 || isset($_GET['searchtags'])
1365 ) {
1366 if (isset($_POST['returnurl'])) {
1367 $location = $_POST['returnurl']; // Handle redirects given by the form
1368 } else {
1369 $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('delete_link'));
1370 }
1371 }
1372
1373 header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1374 exit;
1375 }
1376
1377 // -------- User clicked the "EDIT" button on a link: Display link edit form.
1378 if (isset($_GET['edit_link']))
1379 {
1380 $id = (int) escape($_GET['edit_link']);
1381 $link = $LINKSDB[$id]; // Read database
1382 if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1383 $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1384 $data = array(
1385 'link' => $link,
1386 'link_is_new' => false,
1387 'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1388 'tags' => $LINKSDB->allTags(),
1389 );
1390 $pluginManager->executeHooks('render_editlink', $data);
1391
1392 foreach ($data as $key => $value) {
1393 $PAGE->assign($key, $value);
1394 }
1395
1396 $PAGE->renderPage('editlink');
1397 exit;
1398 }
1399
1400 // -------- User want to post a new link: Display link edit form.
1401 if (isset($_GET['post'])) {
1402 $url = cleanup_url($_GET['post']);
1403
1404 $link_is_new = false;
1405 // Check if URL is not already in database (in this case, we will edit the existing link)
1406 $link = $LINKSDB->getLinkFromUrl($url);
1407 if (! $link)
1408 {
1409 $link_is_new = true;
1410 $linkdate = strval(date(LinkDB::LINK_DATE_FORMAT));
1411 // Get title if it was provided in URL (by the bookmarklet).
1412 $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1413 // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1414 $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1415 $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1416 $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1417 // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1418 if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1419 // Short timeout to keep the application responsive
1420 list($headers, $content) = get_http_response($url, 4);
1421 if (strpos($headers[0], '200 OK') !== false) {
1422 // Retrieve charset.
1423 $charset = get_charset($headers, $content);
1424 // Extract title.
1425 $title = html_extract_title($content);
1426 // Re-encode title in utf-8 if necessary.
1427 if (! empty($title) && strtolower($charset) != 'utf-8') {
1428 $title = mb_convert_encoding($title, 'utf-8', $charset);
1429 }
1430 }
1431 }
1432
1433 if ($url == '') {
1434 $url = '?' . smallHash($linkdate . $LINKSDB->getNextId());
1435 $title = 'Note: ';
1436 }
1437 $url = escape($url);
1438 $title = escape($title);
1439
1440 $link = array(
1441 'linkdate' => $linkdate,
1442 'title' => $title,
1443 'url' => $url,
1444 'description' => $description,
1445 'tags' => $tags,
1446 'private' => $private
1447 );
1448 } else {
1449 $link['linkdate'] = $link['created']->format(LinkDB::LINK_DATE_FORMAT);
1450 }
1451
1452 $data = array(
1453 'link' => $link,
1454 'link_is_new' => $link_is_new,
1455 'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1456 'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1457 'tags' => $LINKSDB->allTags(),
1458 'default_private_links' => $conf->get('privacy.default_private_links', false),
1459 );
1460 $pluginManager->executeHooks('render_editlink', $data);
1461
1462 foreach ($data as $key => $value) {
1463 $PAGE->assign($key, $value);
1464 }
1465
1466 $PAGE->renderPage('editlink');
1467 exit;
1468 }
1469
1470 if ($targetPage == Router::$PAGE_EXPORT) {
1471 // Export links as a Netscape Bookmarks file
1472
1473 if (empty($_GET['selection'])) {
1474 $PAGE->renderPage('export');
1475 exit;
1476 }
1477
1478 // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1479 $selection = $_GET['selection'];
1480 if (isset($_GET['prepend_note_url'])) {
1481 $prependNoteUrl = $_GET['prepend_note_url'];
1482 } else {
1483 $prependNoteUrl = false;
1484 }
1485
1486 try {
1487 $PAGE->assign(
1488 'links',
1489 NetscapeBookmarkUtils::filterAndFormat(
1490 $LINKSDB,
1491 $selection,
1492 $prependNoteUrl,
1493 index_url($_SERVER)
1494 )
1495 );
1496 } catch (Exception $exc) {
1497 header('Content-Type: text/plain; charset=utf-8');
1498 echo $exc->getMessage();
1499 exit;
1500 }
1501 $now = new DateTime();
1502 header('Content-Type: text/html; charset=utf-8');
1503 header(
1504 'Content-disposition: attachment; filename=bookmarks_'
1505 .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1506 );
1507 $PAGE->assign('date', $now->format(DateTime::RFC822));
1508 $PAGE->assign('eol', PHP_EOL);
1509 $PAGE->assign('selection', $selection);
1510 $PAGE->renderPage('export.bookmarks');
1511 exit;
1512 }
1513
1514 if ($targetPage == Router::$PAGE_IMPORT) {
1515 // Upload a Netscape bookmark dump to import its contents
1516
1517 if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
1518 // Show import dialog
1519 $PAGE->assign('maxfilesize', getMaxFileSize());
1520 $PAGE->renderPage('import');
1521 exit;
1522 }
1523
1524 // Import bookmarks from an uploaded file
1525 if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
1526 // The file is too big or some form field may be missing.
1527 echo '<script>alert("The file you are trying to upload is probably'
1528 .' bigger than what this webserver can accept ('
1529 .getMaxFileSize().' bytes).'
1530 .' Please upload in smaller chunks.");document.location=\'?do='
1531 .Router::$PAGE_IMPORT .'\';</script>';
1532 exit;
1533 }
1534 if (! tokenOk($_POST['token'])) {
1535 die('Wrong token.');
1536 }
1537 $status = NetscapeBookmarkUtils::import(
1538 $_POST,
1539 $_FILES,
1540 $LINKSDB,
1541 $conf->get('resource.page_cache')
1542 );
1543 echo '<script>alert("'.$status.'");document.location=\'?do='
1544 .Router::$PAGE_IMPORT .'\';</script>';
1545 exit;
1546 }
1547
1548 // Plugin administration page
1549 if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1550 $pluginMeta = $pluginManager->getPluginsMeta();
1551
1552 // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1553 $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1554 // Load parameters.
1555 $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
1556 uasort(
1557 $enabledPlugins,
1558 function($a, $b) { return $a['order'] - $b['order']; }
1559 );
1560 $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1561
1562 $PAGE->assign('enabledPlugins', $enabledPlugins);
1563 $PAGE->assign('disabledPlugins', $disabledPlugins);
1564 $PAGE->renderPage('pluginsadmin');
1565 exit;
1566 }
1567
1568 // Plugin administration form action
1569 if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1570 try {
1571 if (isset($_POST['parameters_form'])) {
1572 unset($_POST['parameters_form']);
1573 foreach ($_POST as $param => $value) {
1574 $conf->set('plugins.'. $param, escape($value));
1575 }
1576 }
1577 else {
1578 $conf->set('general.enabled_plugins', save_plugin_config($_POST));
1579 }
1580 $conf->write(isLoggedIn());
1581 }
1582 catch (Exception $e) {
1583 error_log(
1584 'ERROR while saving plugin configuration:.' . PHP_EOL .
1585 $e->getMessage()
1586 );
1587
1588 // TODO: do not handle exceptions/errors in JS.
1589 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1590 exit;
1591 }
1592 header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1593 exit;
1594 }
1595
1596 // -------- Otherwise, simply display search form and links:
1597 showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
1598 exit;
1599 }
1600
1601 /**
1602 * Template for the list of links (<div id="linklist">)
1603 * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1604 *
1605 * @param pageBuilder $PAGE pageBuilder instance.
1606 * @param LinkDB $LINKSDB LinkDB instance.
1607 * @param ConfigManager $conf Configuration Manager instance.
1608 * @param PluginManager $pluginManager Plugin Manager instance.
1609 */
1610 function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
1611 {
1612 // Used in templates
1613 $searchtags = !empty($_GET['searchtags']) ? escape($_GET['searchtags']) : '';
1614 $searchterm = !empty($_GET['searchterm']) ? escape($_GET['searchterm']) : '';
1615
1616 // Smallhash filter
1617 if (! empty($_SERVER['QUERY_STRING'])
1618 && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1619 try {
1620 $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1621 } catch (LinkNotFoundException $e) {
1622 $PAGE->render404($e->getMessage());
1623 exit;
1624 }
1625 } else {
1626 // Filter links according search parameters.
1627 $privateonly = !empty($_SESSION['privateonly']);
1628 $linksToDisplay = $LINKSDB->filterSearch($_GET, false, $privateonly);
1629 }
1630
1631 // ---- Handle paging.
1632 $keys = array();
1633 foreach ($linksToDisplay as $key => $value) {
1634 $keys[] = $key;
1635 }
1636
1637
1638
1639 // Select articles according to paging.
1640 $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1641 $pagecount = $pagecount == 0 ? 1 : $pagecount;
1642 $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1643 $page = $page < 1 ? 1 : $page;
1644 $page = $page > $pagecount ? $pagecount : $page;
1645 // Start index.
1646 $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1647 $end = $i + $_SESSION['LINKS_PER_PAGE'];
1648 $linkDisp = array();
1649 while ($i<$end && $i<count($keys))
1650 {
1651 $link = $linksToDisplay[$keys[$i]];
1652 $link['description'] = format_description($link['description'], $conf->get('redirector.url'));
1653 $classLi = ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1654 $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1655 $link['timestamp'] = $link['created']->getTimestamp();
1656 if (! empty($link['updated'])) {
1657 $link['updated_timestamp'] = $link['updated']->getTimestamp();
1658 } else {
1659 $link['updated_timestamp'] = '';
1660 }
1661 $taglist = explode(' ', $link['tags']);
1662 uasort($taglist, 'strcasecmp');
1663 $link['taglist'] = $taglist;
1664 // Check for both signs of a note: starting with ? and 7 chars long.
1665 if ($link['url'][0] === '?' &&
1666 strlen($link['url']) === 7) {
1667 $link['url'] = index_url($_SERVER) . $link['url'];
1668 }
1669
1670 $linkDisp[$keys[$i]] = $link;
1671 $i++;
1672 }
1673
1674 // Compute paging navigation
1675 $searchtagsUrl = empty($searchtags) ? '' : '&searchtags=' . urlencode($searchtags);
1676 $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1677 $previous_page_url = '';
1678 if ($i != count($keys)) {
1679 $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1680 }
1681 $next_page_url='';
1682 if ($page>1) {
1683 $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1684 }
1685
1686 // Fill all template fields.
1687 $data = array(
1688 'previous_page_url' => $previous_page_url,
1689 'next_page_url' => $next_page_url,
1690 'page_current' => $page,
1691 'page_max' => $pagecount,
1692 'result_count' => count($linksToDisplay),
1693 'search_term' => $searchterm,
1694 'search_tags' => $searchtags,
1695 'redirector' => $conf->get('redirector.url'), // Optional redirector URL.
1696 'links' => $linkDisp,
1697 'tags' => $LINKSDB->allTags(),
1698 );
1699
1700 // If there is only a single link, we change on-the-fly the title of the page.
1701 if (count($linksToDisplay) == 1) {
1702 $data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
1703 }
1704
1705 $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1706
1707 foreach ($data as $key => $value) {
1708 $PAGE->assign($key, $value);
1709 }
1710
1711 return;
1712 }
1713
1714 /**
1715 * Compute the thumbnail for a link.
1716 *
1717 * With a link to the original URL.
1718 * Understands various services (youtube.com...)
1719 * Input: $url = URL for which the thumbnail must be found.
1720 * $href = if provided, this URL will be followed instead of $url
1721 * Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1722 * Some of them may be missing.
1723 * Return an empty array if no thumbnail available.
1724 *
1725 * @param ConfigManager $conf Configuration Manager instance.
1726 * @param string $url
1727 * @param string|bool $href
1728 *
1729 * @return array
1730 */
1731 function computeThumbnail($conf, $url, $href = false)
1732 {
1733 if (!$conf->get('thumbnail.enable_thumbnails')) return array();
1734 if ($href==false) $href=$url;
1735
1736 // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1737 // (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1738 // ^^^^^^^^^^^ ^^^^^^^^^^^
1739 $domain = parse_url($url,PHP_URL_HOST);
1740 if ($domain=='youtube.com' || $domain=='www.youtube.com')
1741 {
1742 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1743 if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1744 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1745 }
1746 if ($domain=='youtu.be') // Youtube short links
1747 {
1748 $path = parse_url($url,PHP_URL_PATH);
1749 return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1750 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1751 }
1752 if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1753 {
1754 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1755 if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1756 'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1757 }
1758
1759 if ($domain=='imgur.com')
1760 {
1761 $path = parse_url($url,PHP_URL_PATH);
1762 if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1763 if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1764 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1765 if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1766 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1767
1768 if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1769 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1770 }
1771 if ($domain=='i.imgur.com')
1772 {
1773 $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1774 if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1775 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1776 }
1777 if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1778 {
1779 if (strpos($url,'dailymotion.com/video/')!==false)
1780 {
1781 $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1782 return array('src'=>$thumburl,
1783 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1784 }
1785 }
1786 if (endsWith($domain,'.imageshack.us'))
1787 {
1788 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1789 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1790 {
1791 $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1792 return array('src'=>$thumburl,
1793 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1794 }
1795 }
1796
1797 // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1798 // So we deport the thumbnail generation in order not to slow down page generation
1799 // (and we also cache the thumbnail)
1800
1801 if (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1802
1803 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1804 || $domain=='vimeo.com'
1805 || $domain=='ted.com' || endsWith($domain,'.ted.com')
1806 || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1807 )
1808 {
1809 if ($domain=='vimeo.com')
1810 { // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1811 $path = parse_url($url,PHP_URL_PATH);
1812 if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
1813 }
1814 if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
1815 { // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
1816 $path = parse_url($url,PHP_URL_PATH);
1817 if (!preg_match('!/\d+.+?!',$path)) return array();
1818 }
1819 if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
1820 { // Make sure this TED URL points to a video (/talks/...)
1821 $path = parse_url($url,PHP_URL_PATH);
1822 if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
1823 }
1824 $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1825 return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1826 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1827 }
1828
1829 // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
1830 // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
1831 // But using the extension will do.
1832 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1833 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1834 {
1835 $sign = hash_hmac('sha256', $url, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
1836 return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
1837 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
1838 }
1839 return array(); // No thumbnail.
1840
1841 }
1842
1843
1844 // Returns the HTML code to display a thumbnail for a link
1845 // with a link to the original URL.
1846 // Understands various services (youtube.com...)
1847 // Input: $url = URL for which the thumbnail must be found.
1848 // $href = if provided, this URL will be followed instead of $url
1849 // Returns '' if no thumbnail available.
1850 function thumbnail($url,$href=false)
1851 {
1852 // FIXME!
1853 global $conf;
1854 $t = computeThumbnail($conf, $url,$href);
1855 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1856
1857 $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
1858 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
1859 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1860 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
1861 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
1862 $html.='></a>';
1863 return $html;
1864 }
1865
1866 // Returns the HTML code to display a thumbnail for a link
1867 // for the picture wall (using lazy image loading)
1868 // Understands various services (youtube.com...)
1869 // Input: $url = URL for which the thumbnail must be found.
1870 // $href = if provided, this URL will be followed instead of $url
1871 // Returns '' if no thumbnail available.
1872 function lazyThumbnail($conf, $url,$href=false)
1873 {
1874 // FIXME!
1875 global $conf;
1876 $t = computeThumbnail($conf, $url,$href);
1877 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
1878
1879 $html='<a href="'.escape($t['href']).'">';
1880
1881 // Lazy image
1882 $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
1883
1884 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
1885 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1886 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
1887 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
1888 $html.='>';
1889
1890 // No-JavaScript fallback.
1891 $html.='<noscript><img src="'.escape($t['src']).'"';
1892 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
1893 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
1894 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
1895 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
1896 $html.='></noscript></a>';
1897
1898 return $html;
1899 }
1900
1901
1902 /**
1903 * Installation
1904 * This function should NEVER be called if the file data/config.php exists.
1905 *
1906 * @param ConfigManager $conf Configuration Manager instance.
1907 */
1908 function install($conf)
1909 {
1910 // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
1911 if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
1912
1913
1914 // This part makes sure sessions works correctly.
1915 // (Because on some hosts, session.save_path may not be set correctly,
1916 // or we may not have write access to it.)
1917 if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
1918 { // Step 2: Check if data in session is correct.
1919 echo '<pre>Sessions do not seem to work correctly on your server.<br>';
1920 echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
1921 echo 'It currently points to '.session_save_path().'<br>';
1922 echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
1923 echo '<br><a href="?">Click to try again.</a></pre>';
1924 die;
1925 }
1926 if (!isset($_SESSION['session_tested']))
1927 { // Step 1 : Try to store data in session and reload page.
1928 $_SESSION['session_tested'] = 'Working'; // Try to set a variable in session.
1929 header('Location: '.index_url($_SERVER).'?test_session'); // Redirect to check stored data.
1930 }
1931 if (isset($_GET['test_session']))
1932 { // Step 3: Sessions are OK. Remove test parameter from URL.
1933 header('Location: '.index_url($_SERVER));
1934 }
1935
1936
1937 if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1938 {
1939 $tz = 'UTC';
1940 if (!empty($_POST['continent']) && !empty($_POST['city'])
1941 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1942 ) {
1943 $tz = $_POST['continent'].'/'.$_POST['city'];
1944 }
1945 $conf->set('general.timezone', $tz);
1946 $login = $_POST['setlogin'];
1947 $conf->set('credentials.login', $login);
1948 $salt = sha1(uniqid('', true) .'_'. mt_rand());
1949 $conf->set('credentials.salt', $salt);
1950 $conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
1951 if (!empty($_POST['title'])) {
1952 $conf->set('general.title', escape($_POST['title']));
1953 } else {
1954 $conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
1955 }
1956 $conf->set('updates.check_updates', !empty($_POST['updateCheck']));
1957 try {
1958 // Everything is ok, let's create config file.
1959 $conf->write(isLoggedIn());
1960 }
1961 catch(Exception $e) {
1962 error_log(
1963 'ERROR while writing config file after installation.' . PHP_EOL .
1964 $e->getMessage()
1965 );
1966
1967 // TODO: do not handle exceptions/errors in JS.
1968 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
1969 exit;
1970 }
1971 echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
1972 exit;
1973 }
1974
1975 // Display config form:
1976 list($timezone_form, $timezone_js) = generateTimeZoneForm();
1977 $timezone_html = '';
1978 if ($timezone_form != '') {
1979 $timezone_html = '<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
1980 }
1981
1982 $PAGE = new PageBuilder($conf);
1983 $PAGE->assign('timezone_html',$timezone_html);
1984 $PAGE->assign('timezone_js',$timezone_js);
1985 $PAGE->renderPage('install');
1986 exit;
1987 }
1988
1989 /**
1990 * Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
1991 * I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
1992 * The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
1993 * This function is called by passing the URL:
1994 * http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
1995 * [URL] is the URL of the link (e.g. a flickr page)
1996 * [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
1997 * The function below will fetch the image from the webservice and store it in the cache.
1998 *
1999 * @param ConfigManager $conf Configuration Manager instance,
2000 */
2001 function genThumbnail($conf)
2002 {
2003 // Make sure the parameters in the URL were generated by us.
2004 $sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
2005 if ($sign!=$_GET['hmac']) die('Naughty boy!');
2006
2007 $cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
2008 // Let's see if we don't already have the image for this URL in the cache.
2009 $thumbname=hash('sha1',$_GET['url']).'.jpg';
2010 if (is_file($cacheDir .'/'. $thumbname))
2011 { // We have the thumbnail, just serve it:
2012 header('Content-Type: image/jpeg');
2013 echo file_get_contents($cacheDir .'/'. $thumbname);
2014 return;
2015 }
2016 // We may also serve a blank image (if service did not respond)
2017 $blankname=hash('sha1',$_GET['url']).'.gif';
2018 if (is_file($cacheDir .'/'. $blankname))
2019 {
2020 header('Content-Type: image/gif');
2021 echo file_get_contents($cacheDir .'/'. $blankname);
2022 return;
2023 }
2024
2025 // Otherwise, generate the thumbnail.
2026 $url = $_GET['url'];
2027 $domain = parse_url($url,PHP_URL_HOST);
2028
2029 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2030 {
2031 // Crude replacement to handle new flickr domain policy (They prefer www. now)
2032 $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2033
2034 // Is this a link to an image, or to a flickr page ?
2035 $imageurl='';
2036 if (endsWith(parse_url($url, PHP_URL_PATH), '.jpg'))
2037 { // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2038 preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2039 if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2040 }
2041 else // This is a flickr page (html)
2042 {
2043 // Get the flickr html page.
2044 list($headers, $content) = get_http_response($url, 20);
2045 if (strpos($headers[0], '200 OK') !== false)
2046 {
2047 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2048 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2049 if (!empty($matches[1])) $imageurl=$matches[1];
2050
2051 // In albums (and some other pages), the link rel="image_src" is not provided,
2052 // but flickr provides:
2053 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2054 if ($imageurl=='')
2055 {
2056 preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2057 if (!empty($matches[1])) $imageurl=$matches[1];
2058 }
2059 }
2060 }
2061
2062 if ($imageurl!='')
2063 { // Let's download the image.
2064 // Image is 240x120, so 10 seconds to download should be enough.
2065 list($headers, $content) = get_http_response($imageurl, 10);
2066 if (strpos($headers[0], '200 OK') !== false) {
2067 // Save image to cache.
2068 file_put_contents($cacheDir .'/'. $thumbname, $content);
2069 header('Content-Type: image/jpeg');
2070 echo $content;
2071 return;
2072 }
2073 }
2074 }
2075
2076 elseif ($domain=='vimeo.com' )
2077 {
2078 // This is more complex: we have to perform a HTTP request, then parse the result.
2079 // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2080 $vid = substr(parse_url($url,PHP_URL_PATH),1);
2081 list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2082 if (strpos($headers[0], '200 OK') !== false) {
2083 $t = unserialize($content);
2084 $imageurl = $t[0]['thumbnail_medium'];
2085 // Then we download the image and serve it to our client.
2086 list($headers, $content) = get_http_response($imageurl, 10);
2087 if (strpos($headers[0], '200 OK') !== false) {
2088 // Save image to cache.
2089 file_put_contents($cacheDir .'/'. $thumbname, $content);
2090 header('Content-Type: image/jpeg');
2091 echo $content;
2092 return;
2093 }
2094 }
2095 }
2096
2097 elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2098 {
2099 // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2100 // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2101 // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2102 list($headers, $content) = get_http_response($url, 5);
2103 if (strpos($headers[0], '200 OK') !== false) {
2104 // Extract the link to the thumbnail
2105 preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2106 if (!empty($matches[1]))
2107 { // Let's download the image.
2108 $imageurl=$matches[1];
2109 // No control on image size, so wait long enough
2110 list($headers, $content) = get_http_response($imageurl, 20);
2111 if (strpos($headers[0], '200 OK') !== false) {
2112 $filepath = $cacheDir .'/'. $thumbname;
2113 file_put_contents($filepath, $content); // Save image to cache.
2114 if (resizeImage($filepath))
2115 {
2116 header('Content-Type: image/jpeg');
2117 echo file_get_contents($filepath);
2118 return;
2119 }
2120 }
2121 }
2122 }
2123 }
2124
2125 elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2126 {
2127 // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2128 // http://xkcd.com/327/
2129 // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2130 list($headers, $content) = get_http_response($url, 5);
2131 if (strpos($headers[0], '200 OK') !== false) {
2132 // Extract the link to the thumbnail
2133 preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2134 if (!empty($matches[1]))
2135 { // Let's download the image.
2136 $imageurl=$matches[1];
2137 // No control on image size, so wait long enough
2138 list($headers, $content) = get_http_response($imageurl, 20);
2139 if (strpos($headers[0], '200 OK') !== false) {
2140 $filepath = $cacheDir.'/'.$thumbname;
2141 // Save image to cache.
2142 file_put_contents($filepath, $content);
2143 if (resizeImage($filepath))
2144 {
2145 header('Content-Type: image/jpeg');
2146 echo file_get_contents($filepath);
2147 return;
2148 }
2149 }
2150 }
2151 }
2152 }
2153
2154 else
2155 {
2156 // For all other domains, we try to download the image and make a thumbnail.
2157 // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2158 list($headers, $content) = get_http_response($url, 30);
2159 if (strpos($headers[0], '200 OK') !== false) {
2160 $filepath = $cacheDir .'/'.$thumbname;
2161 // Save image to cache.
2162 file_put_contents($filepath, $content);
2163 if (resizeImage($filepath))
2164 {
2165 header('Content-Type: image/jpeg');
2166 echo file_get_contents($filepath);
2167 return;
2168 }
2169 }
2170 }
2171
2172
2173 // Otherwise, return an empty image (8x8 transparent gif)
2174 $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2175 // Also put something in cache so that this URL is not requested twice.
2176 file_put_contents($cacheDir .'/'. $blankname, $blankgif);
2177 header('Content-Type: image/gif');
2178 echo $blankgif;
2179 }
2180
2181 // Make a thumbnail of the image (to width: 120 pixels)
2182 // Returns true if success, false otherwise.
2183 function resizeImage($filepath)
2184 {
2185 if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2186
2187 // Trick: some stupid people rename GIF as JPEG... or else.
2188 // So we really try to open each image type whatever the extension is.
2189 $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2190 $im=false;
2191 $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2192 $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2193 $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2194 if (!$im) return false; // Unable to open image (corrupted or not an image)
2195 $w = imagesx($im);
2196 $h = imagesy($im);
2197 $ystart = 0; $yheight=$h;
2198 if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2199 $nw = 120; // Desired width
2200 $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2201 // Resize image:
2202 $im2 = imagecreatetruecolor($nw,$nh);
2203 imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2204 imageinterlace($im2,true); // For progressive JPEG.
2205 $tempname=$filepath.'_TEMP.jpg';
2206 imagejpeg($im2, $tempname, 90);
2207 imagedestroy($im);
2208 imagedestroy($im2);
2209 unlink($filepath);
2210 rename($tempname,$filepath); // Overwrite original picture with thumbnail.
2211 return true;
2212 }
2213
2214 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; } // Thumbnail generation/cache does not need the link database.
2215 if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
2216 if (!isset($_SESSION['LINKS_PER_PAGE'])) {
2217 $_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
2218 }
2219 renderPage($conf, $pluginManager);