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1 <?php
2 /**
3 * Shaarli v0.6.5 - Shaare your links...
4 *
5 * The personal, minimalist, super-fast, no-database Delicious clone.
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 * Hardcoded parameters
27 * You should not touch any code below (or at your own risks!)
28 * (These parameters can be overwritten by editing the file /data/config.php)
29 * -----------------------------------------------------------------------------
30 */
31
32 /*
33 * Shaarli directories & configuration files
34 */
35 // Data subdirectory
36 $GLOBALS['config']['DATADIR'] = 'data';
37
38 // Main configuration file
39 $GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php';
40
41 // Link datastore
42 $GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php';
43
44 // Banned IPs
45 $GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php';
46
47 // Processed updates file.
48 $GLOBALS['config']['UPDATES_FILE'] = $GLOBALS['config']['DATADIR'].'/updates.txt';
49
50 // Access log
51 $GLOBALS['config']['LOG_FILE'] = $GLOBALS['config']['DATADIR'].'/log.txt';
52
53 // For updates check of Shaarli
54 $GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt';
55
56 // Set ENABLE_UPDATECHECK to disabled by default.
57 $GLOBALS['config']['ENABLE_UPDATECHECK'] = false;
58
59 // RainTPL cache directory (keep the trailing slash!)
60 $GLOBALS['config']['RAINTPL_TMP'] = 'tmp/';
61 // Raintpl template directory (keep the trailing slash!)
62 $GLOBALS['config']['RAINTPL_TPL'] = 'tpl/';
63
64 // Thumbnail cache directory
65 $GLOBALS['config']['CACHEDIR'] = 'cache';
66
67 // Atom & RSS feed cache directory
68 $GLOBALS['config']['PAGECACHE'] = 'pagecache';
69
70 /*
71 * Global configuration
72 */
73 // Ban IP after this many failures
74 $GLOBALS['config']['BAN_AFTER'] = 4;
75 // Ban duration for IP address after login failures (in seconds)
76 $GLOBALS['config']['BAN_DURATION'] = 1800;
77
78 // Feed options
79 // Enable RSS permalinks by default.
80 // This corresponds to the default behavior of shaarli before this was added as an option.
81 $GLOBALS['config']['ENABLE_RSS_PERMALINKS'] = true;
82 // If true, an extra "ATOM feed" button will be displayed in the toolbar
83 $GLOBALS['config']['SHOW_ATOM'] = false;
84
85 // Link display options
86 $GLOBALS['config']['HIDE_PUBLIC_LINKS'] = false;
87 $GLOBALS['config']['HIDE_TIMESTAMPS'] = false;
88 $GLOBALS['config']['LINKS_PER_PAGE'] = 20;
89
90 // Open Shaarli (true): anyone can add/edit/delete links without having to login
91 $GLOBALS['config']['OPEN_SHAARLI'] = false;
92
93 // Thumbnails
94 // Display thumbnails in links
95 $GLOBALS['config']['ENABLE_THUMBNAILS'] = true;
96 // Store thumbnails in a local cache
97 $GLOBALS['config']['ENABLE_LOCALCACHE'] = true;
98
99 // Update check frequency for Shaarli. 86400 seconds=24 hours
100 $GLOBALS['config']['UPDATECHECK_BRANCH'] = 'stable';
101 $GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400;
102
103 $GLOBALS['config']['REDIRECTOR_URLENCODE'] = true;
104
105 /*
106 * Plugin configuration
107 *
108 * Warning: order matters!
109 *
110 * These settings may be be overriden in:
111 * - data/config.php
112 * - each plugin's configuration file
113 */
114 //$GLOBALS['config']['ENABLED_PLUGINS'] = array(
115 // 'qrcode', 'archiveorg', 'readityourself', 'demo_plugin', 'playvideos',
116 // 'wallabag', 'markdown', 'addlink_toolbar',
117 //);
118 $GLOBALS['config']['ENABLED_PLUGINS'] = array('qrcode');
119
120 // Initialize plugin parameters array.
121 $GLOBALS['plugins'] = array();
122
123 // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
124 $GLOBALS['config']['PUBSUBHUB_URL'] = '';
125
126 /*
127 * PHP configuration
128 */
129 define('shaarli_version', '0.6.5');
130
131 // http://server.com/x/shaarli --> /shaarli/
132 define('WEB_PATH', substr($_SERVER["REQUEST_URI"], 0, 1+strrpos($_SERVER["REQUEST_URI"], '/', 0)));
133
134 // High execution time in case of problematic imports/exports.
135 ini_set('max_input_time','60');
136
137 // Try to set max upload file size and read
138 ini_set('memory_limit', '128M');
139 ini_set('post_max_size', '16M');
140 ini_set('upload_max_filesize', '16M');
141
142 // See all error except warnings
143 error_reporting(E_ALL^E_WARNING);
144 // See all errors (for debugging only)
145 //error_reporting(-1);
146
147 /*
148 * User configuration
149 */
150 if (is_file($GLOBALS['config']['CONFIG_FILE'])) {
151 require_once $GLOBALS['config']['CONFIG_FILE'];
152 }
153
154 // Shaarli library
155 require_once 'application/ApplicationUtils.php';
156 require_once 'application/Cache.php';
157 require_once 'application/CachedPage.php';
158 require_once 'application/FeedBuilder.php';
159 require_once 'application/FileUtils.php';
160 require_once 'application/HttpUtils.php';
161 require_once 'application/LinkDB.php';
162 require_once 'application/LinkFilter.php';
163 require_once 'application/LinkUtils.php';
164 require_once 'application/NetscapeBookmarkUtils.php';
165 require_once 'application/TimeZone.php';
166 require_once 'application/Url.php';
167 require_once 'application/Utils.php';
168 require_once 'application/Config.php';
169 require_once 'application/PluginManager.php';
170 require_once 'application/Router.php';
171 require_once 'application/Updater.php';
172
173 // Ensure the PHP version is supported
174 try {
175 ApplicationUtils::checkPHPVersion('5.3', PHP_VERSION);
176 } catch(Exception $exc) {
177 header('Content-Type: text/plain; charset=utf-8');
178 echo $exc->getMessage();
179 exit;
180 }
181
182 // Force cookie path (but do not change lifetime)
183 $cookie = session_get_cookie_params();
184 $cookiedir = '';
185 if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
186 $cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
187 }
188 // Set default cookie expiration and path.
189 session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
190 // Set session parameters on server side.
191 // If the user does not access any page within this time, his/her session is considered expired.
192 define('INACTIVITY_TIMEOUT', 3600); // in seconds.
193 // Use cookies to store session.
194 ini_set('session.use_cookies', 1);
195 // Force cookies for session (phpsessionID forbidden in URL).
196 ini_set('session.use_only_cookies', 1);
197 // Prevent PHP form using sessionID in URL if cookies are disabled.
198 ini_set('session.use_trans_sid', false);
199
200 session_name('shaarli');
201 // Start session if needed (Some server auto-start sessions).
202 if (session_id() == '') {
203 session_start();
204 }
205
206 // Regenerate session ID if invalid or not defined in cookie.
207 if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
208 session_regenerate_id(true);
209 $_COOKIE['shaarli'] = session_id();
210 }
211
212 include "inc/rain.tpl.class.php"; //include Rain TPL
213 raintpl::$tpl_dir = $GLOBALS['config']['RAINTPL_TPL']; // template directory
214 raintpl::$cache_dir = $GLOBALS['config']['RAINTPL_TMP']; // cache directory
215
216 $pluginManager = PluginManager::getInstance();
217 $pluginManager->load($GLOBALS['config']['ENABLED_PLUGINS']);
218
219 ob_start(); // Output buffering for the page cache.
220
221
222 // In case stupid admin has left magic_quotes enabled in php.ini:
223 if (get_magic_quotes_gpc())
224 {
225 function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
226 $_POST = array_map('stripslashes_deep', $_POST);
227 $_GET = array_map('stripslashes_deep', $_GET);
228 $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
229 }
230
231 // Prevent caching on client side or proxy: (yes, it's ugly)
232 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
233 header("Cache-Control: no-store, no-cache, must-revalidate");
234 header("Cache-Control: post-check=0, pre-check=0", false);
235 header("Pragma: no-cache");
236
237 // Handling of old config file which do not have the new parameters.
238 if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.escape(index_url($_SERVER));
239 if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get();
240 if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']='';
241 if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false;
242 if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false;
243 if (empty($GLOBALS['titleLink'])) $GLOBALS['titleLink']='?';
244 // I really need to rewrite Shaarli with a proper configuation manager.
245
246 if (! is_file($GLOBALS['config']['CONFIG_FILE'])) {
247 // Ensure Shaarli has proper access to its resources
248 $errors = ApplicationUtils::checkResourcePermissions($GLOBALS['config']);
249
250 if ($errors != array()) {
251 $message = '<p>Insufficient permissions:</p><ul>';
252
253 foreach ($errors as $error) {
254 $message .= '<li>'.$error.'</li>';
255 }
256 $message .= '</ul>';
257
258 header('Content-Type: text/html; charset=utf-8');
259 echo $message;
260 exit;
261 }
262
263 // Display the installation form if no existing config is found
264 install();
265 }
266
267 $GLOBALS['title'] = !empty($GLOBALS['title']) ? escape($GLOBALS['title']) : '';
268 $GLOBALS['titleLink'] = !empty($GLOBALS['titleLink']) ? escape($GLOBALS['titleLink']) : '';
269 $GLOBALS['redirector'] = !empty($GLOBALS['redirector']) ? escape($GLOBALS['redirector']) : '';
270
271 // a token depending of deployment salt, user password, and the current ip
272 define('STAY_SIGNED_IN_TOKEN', sha1($GLOBALS['hash'].$_SERVER["REMOTE_ADDR"].$GLOBALS['salt']));
273
274 // Sniff browser language and set date format accordingly.
275 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
276 autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
277 }
278 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
279
280 //==================================================================================================
281 // Checking session state (i.e. is the user still logged in)
282 //==================================================================================================
283
284 function setup_login_state() {
285 if ($GLOBALS['config']['OPEN_SHAARLI']) {
286 return true;
287 }
288 $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
289 $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
290 if (!isset($GLOBALS['login'])) {
291 $userIsLoggedIn = false; // Shaarli is not configured yet.
292 $loginFailure = true;
293 }
294 if (isset($_COOKIE['shaarli_staySignedIn']) &&
295 $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
296 !$loginFailure)
297 {
298 fillSessionInfo();
299 $userIsLoggedIn = true;
300 }
301 // If session does not exist on server side, or IP address has changed, or session has expired, logout.
302 if (empty($_SESSION['uid']) ||
303 ($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) ||
304 time() >= $_SESSION['expires_on'])
305 {
306 logout();
307 $userIsLoggedIn = false;
308 $loginFailure = true;
309 }
310 if (!empty($_SESSION['longlastingsession'])) {
311 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
312 }
313 else {
314 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
315 }
316 if (!$loginFailure) {
317 $userIsLoggedIn = true;
318 }
319
320 return $userIsLoggedIn;
321 }
322 $userIsLoggedIn = setup_login_state();
323
324 // ------------------------------------------------------------------------------------------
325 // PubSubHubbub protocol support (if enabled) [UNTESTED]
326 // (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
327 if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php';
328 function pubsubhub()
329 {
330 if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
331 {
332 $p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']);
333 $topic_url = array (
334 index_url($_SERVER).'?do=atom',
335 index_url($_SERVER).'?do=rss'
336 );
337 $p->publish_update($topic_url);
338 }
339 }
340
341 // ------------------------------------------------------------------------------------------
342 // Session management
343
344 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
345 function allIPs()
346 {
347 $ip = $_SERVER["REMOTE_ADDR"];
348 // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
349 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
350 if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
351 return $ip;
352 }
353
354 function fillSessionInfo() {
355 $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
356 $_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked.
357 $_SESSION['username']=$GLOBALS['login'];
358 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
359 }
360
361 // Check that user/password is correct.
362 function check_auth($login,$password)
363 {
364 $hash = sha1($password.$login.$GLOBALS['salt']);
365 if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
366 { // Login/password is correct.
367 fillSessionInfo();
368 logm($GLOBALS['config']['LOG_FILE'], $_SERVER['REMOTE_ADDR'], 'Login successful');
369 return True;
370 }
371 logm($GLOBALS['config']['LOG_FILE'], $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
372 return False;
373 }
374
375 // Returns true if the user is logged in.
376 function isLoggedIn()
377 {
378 global $userIsLoggedIn;
379 return $userIsLoggedIn;
380 }
381
382 // Force logout.
383 function logout() {
384 if (isset($_SESSION)) {
385 unset($_SESSION['uid']);
386 unset($_SESSION['ip']);
387 unset($_SESSION['username']);
388 unset($_SESSION['privateonly']);
389 }
390 setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
391 }
392
393
394 // ------------------------------------------------------------------------------------------
395 // Brute force protection system
396 // Several consecutive failed logins will ban the IP address for 30 minutes.
397 if (!is_file($GLOBALS['config']['IPBANS_FILENAME'])) file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
398 include $GLOBALS['config']['IPBANS_FILENAME'];
399 // Signal a failed login. Will ban the IP if too many failures:
400 function ban_loginFailed()
401 {
402 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
403 if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
404 $gb['FAILURES'][$ip]++;
405 if ($gb['FAILURES'][$ip]>($GLOBALS['config']['BAN_AFTER']-1))
406 {
407 $gb['BANS'][$ip]=time()+$GLOBALS['config']['BAN_DURATION'];
408 logm($GLOBALS['config']['LOG_FILE'], $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
409 }
410 $GLOBALS['IPBANS'] = $gb;
411 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
412 }
413
414 // Signals a successful login. Resets failed login counter.
415 function ban_loginOk()
416 {
417 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
418 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
419 $GLOBALS['IPBANS'] = $gb;
420 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
421 }
422
423 // Checks if the user CAN login. If 'true', the user can try to login.
424 function ban_canLogin()
425 {
426 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
427 if (isset($gb['BANS'][$ip]))
428 {
429 // User is banned. Check if the ban has expired:
430 if ($gb['BANS'][$ip]<=time())
431 { // Ban expired, user can try to login again.
432 logm($GLOBALS['config']['LOG_FILE'], $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
433 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
434 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
435 return true; // Ban has expired, user can login.
436 }
437 return false; // User is banned.
438 }
439 return true; // User is not banned.
440 }
441
442 // ------------------------------------------------------------------------------------------
443 // Process login form: Check if login/password is correct.
444 if (isset($_POST['login']))
445 {
446 if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
447 if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
448 { // Login/password is OK.
449 ban_loginOk();
450 // If user wants to keep the session cookie even after the browser closes:
451 if (!empty($_POST['longlastingsession']))
452 {
453 setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
454 $_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
455 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
456
457 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
458 session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
459 // Note: Never forget the trailing slash on the cookie path!
460 session_regenerate_id(true); // Send cookie with new expiration date to browser.
461 }
462 else // Standard session expiration (=when browser closes)
463 {
464 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
465 session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
466 session_regenerate_id(true);
467 }
468
469 // Optional redirect after login:
470 if (isset($_GET['post'])) {
471 $uri = '?post='. urlencode($_GET['post']);
472 foreach (array('description', 'source', 'title') as $param) {
473 if (!empty($_GET[$param])) {
474 $uri .= '&'.$param.'='.urlencode($_GET[$param]);
475 }
476 }
477 header('Location: '. $uri);
478 exit;
479 }
480
481 if (isset($_GET['edit_link'])) {
482 header('Location: ?edit_link='. escape($_GET['edit_link']));
483 exit;
484 }
485
486 if (isset($_POST['returnurl'])) {
487 // Prevent loops over login screen.
488 if (strpos($_POST['returnurl'], 'do=login') === false) {
489 header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
490 exit;
491 }
492 }
493 header('Location: ?'); exit;
494 }
495 else
496 {
497 ban_loginFailed();
498 $redir = '';
499 if (isset($_GET['post'])) {
500 $redir = '?post=' . urlencode($_GET['post']);
501 foreach (array('description', 'source', 'title') as $param) {
502 if (!empty($_GET[$param])) {
503 $redir .= '&' . $param . '=' . urlencode($_GET[$param]);
504 }
505 }
506 }
507 echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
508 exit;
509 }
510 }
511
512 // ------------------------------------------------------------------------------------------
513 // Misc utility functions:
514
515 // Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes.
516 function return_bytes($val)
517 {
518 $val = trim($val); $last=strtolower($val[strlen($val)-1]);
519 switch($last)
520 {
521 case 'g': $val *= 1024;
522 case 'm': $val *= 1024;
523 case 'k': $val *= 1024;
524 }
525 return $val;
526 }
527
528 // Try to determine max file size for uploads (POST).
529 // Returns an integer (in bytes)
530 function getMaxFileSize()
531 {
532 $size1 = return_bytes(ini_get('post_max_size'));
533 $size2 = return_bytes(ini_get('upload_max_filesize'));
534 // Return the smaller of two:
535 $maxsize = min($size1,$size2);
536 // FIXME: Then convert back to readable notations ? (e.g. 2M instead of 2000000)
537 return $maxsize;
538 }
539
540 // ------------------------------------------------------------------------------------------
541 // Token management for XSRF protection
542 // Token should be used in any form which acts on data (create,update,delete,import...).
543 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
544
545 // Returns a token.
546 function getToken()
547 {
548 $rnd = sha1(uniqid('',true).'_'.mt_rand().$GLOBALS['salt']); // We generate a random string.
549 $_SESSION['tokens'][$rnd]=1; // Store it on the server side.
550 return $rnd;
551 }
552
553 // Tells if a token is OK. Using this function will destroy the token.
554 // true=token is OK.
555 function tokenOk($token)
556 {
557 if (isset($_SESSION['tokens'][$token]))
558 {
559 unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
560 return true; // Token is OK.
561 }
562 return false; // Wrong token, or already used.
563 }
564
565 // ------------------------------------------------------------------------------------------
566 /* This class is in charge of building the final page.
567 (This is basically a wrapper around RainTPL which pre-fills some fields.)
568 p = new pageBuilder;
569 p.assign('myfield','myvalue');
570 p.renderPage('mytemplate');
571
572 */
573 class pageBuilder
574 {
575 private $tpl; // RainTPL template
576
577 function __construct()
578 {
579 $this->tpl = false;
580 }
581
582 /**
583 * Initialize all default tpl tags.
584 */
585 private function initialize()
586 {
587 $this->tpl = new RainTPL;
588
589 try {
590 $version = ApplicationUtils::checkUpdate(
591 shaarli_version,
592 $GLOBALS['config']['UPDATECHECK_FILENAME'],
593 $GLOBALS['config']['UPDATECHECK_INTERVAL'],
594 $GLOBALS['config']['ENABLE_UPDATECHECK'],
595 isLoggedIn(),
596 $GLOBALS['config']['UPDATECHECK_BRANCH']
597 );
598 $this->tpl->assign('newVersion', escape($version));
599 $this->tpl->assign('versionError', '');
600
601 } catch (Exception $exc) {
602 logm($GLOBALS['config']['LOG_FILE'], $_SERVER['REMOTE_ADDR'], $exc->getMessage());
603 $this->tpl->assign('newVersion', '');
604 $this->tpl->assign('versionError', escape($exc->getMessage()));
605 }
606
607 $this->tpl->assign('feedurl', escape(index_url($_SERVER)));
608 $searchcrits = ''; // Search criteria
609 if (!empty($_GET['searchtags'])) {
610 $searchcrits .= '&searchtags=' . urlencode($_GET['searchtags']);
611 }
612 if (!empty($_GET['searchterm'])) {
613 $searchcrits .= '&searchterm=' . urlencode($_GET['searchterm']);
614 }
615 $this->tpl->assign('searchcrits', $searchcrits);
616 $this->tpl->assign('source', index_url($_SERVER));
617 $this->tpl->assign('version', shaarli_version);
618 $this->tpl->assign('scripturl', index_url($_SERVER));
619 $this->tpl->assign('pagetitle', 'Shaarli');
620 $this->tpl->assign('privateonly', !empty($_SESSION['privateonly'])); // Show only private links?
621 if (!empty($GLOBALS['title'])) {
622 $this->tpl->assign('pagetitle', $GLOBALS['title']);
623 }
624 if (!empty($GLOBALS['titleLink'])) {
625 $this->tpl->assign('titleLink', $GLOBALS['titleLink']);
626 }
627 if (!empty($GLOBALS['pagetitle'])) {
628 $this->tpl->assign('pagetitle', $GLOBALS['pagetitle']);
629 }
630 $this->tpl->assign('shaarlititle', empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title']);
631 if (!empty($GLOBALS['plugin_errors'])) {
632 $this->tpl->assign('plugin_errors', $GLOBALS['plugin_errors']);
633 }
634 }
635
636 // The following assign() method is basically the same as RainTPL (except that it's lazy)
637 public function assign($what,$where)
638 {
639 if ($this->tpl===false) $this->initialize(); // Lazy initialization
640 $this->tpl->assign($what,$where);
641 }
642
643 /**
644 * Assign an array of data to the template builder.
645 *
646 * @param array $data Data to assign.
647 *
648 * @return false if invalid data.
649 */
650 public function assignAll($data)
651 {
652 // Lazy initialization
653 if ($this->tpl === false) {
654 $this->initialize();
655 }
656
657 if (empty($data) || !is_array($data)){
658 return false;
659 }
660
661 foreach ($data as $key => $value) {
662 $this->assign($key, $value);
663 }
664 }
665
666 // Render a specific page (using a template).
667 // e.g. pb.renderPage('picwall')
668 public function renderPage($page)
669 {
670 if ($this->tpl===false) $this->initialize(); // Lazy initialization
671 $this->tpl->draw($page);
672 }
673
674 /**
675 * Render a 404 page (uses the template : tpl/404.tpl)
676 *
677 * usage : $PAGE->render404('The link was deleted')
678 * @param string $message A messate to display what is not found
679 */
680 public function render404($message='The page you are trying to reach does not exist or has been deleted.') {
681 header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
682 $this->tpl->assign('error_message', $message);
683 $this->renderPage('404');
684 }
685 }
686
687 // ------------------------------------------------------------------------------------------
688 // Daily RSS feed: 1 RSS entry per day giving all the links on that day.
689 // Gives the last 7 days (which have links).
690 // This RSS feed cannot be filtered.
691 function showDailyRSS() {
692 // Cache system
693 $query = $_SERVER["QUERY_STRING"];
694 $cache = new CachedPage(
695 $GLOBALS['config']['PAGECACHE'],
696 page_url($_SERVER),
697 startsWith($query,'do=dailyrss') && !isLoggedIn()
698 );
699 $cached = $cache->cachedVersion();
700 if (!empty($cached)) {
701 echo $cached;
702 exit;
703 }
704
705 // If cached was not found (or not usable), then read the database and build the response:
706 // Read links from database (and filter private links if used it not logged in).
707 $LINKSDB = new LinkDB(
708 $GLOBALS['config']['DATASTORE'],
709 isLoggedIn(),
710 $GLOBALS['config']['HIDE_PUBLIC_LINKS'],
711 $GLOBALS['redirector'],
712 $GLOBALS['config']['REDIRECTOR_URLENCODE']
713 );
714
715 /* Some Shaarlies may have very few links, so we need to look
716 back in time (rsort()) until we have enough days ($nb_of_days).
717 */
718 $linkdates = array();
719 foreach ($LINKSDB as $linkdate => $value) {
720 $linkdates[] = $linkdate;
721 }
722 rsort($linkdates);
723 $nb_of_days = 7; // We take 7 days.
724 $today = Date('Ymd');
725 $days = array();
726
727 foreach ($linkdates as $linkdate) {
728 $day = substr($linkdate, 0, 8); // Extract day (without time)
729 if (strcmp($day,$today) < 0) {
730 if (empty($days[$day])) {
731 $days[$day] = array();
732 }
733 $days[$day][] = $linkdate;
734 }
735
736 if (count($days) > $nb_of_days) {
737 break; // Have we collected enough days?
738 }
739 }
740
741 // Build the RSS feed.
742 header('Content-Type: application/rss+xml; charset=utf-8');
743 $pageaddr = escape(index_url($_SERVER));
744 echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
745 echo '<channel>';
746 echo '<title>Daily - '. $GLOBALS['title'] . '</title>';
747 echo '<link>'. $pageaddr .'</link>';
748 echo '<description>Daily shared links</description>';
749 echo '<language>en-en</language>';
750 echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
751
752 // For each day.
753 foreach ($days as $day => $linkdates) {
754 $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
755 $absurl = escape(index_url($_SERVER).'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page.
756
757 // Build the HTML body of this RSS entry.
758 $html = '';
759 $href = '';
760 $links = array();
761
762 // We pre-format some fields for proper output.
763 foreach ($linkdates as $linkdate) {
764 $l = $LINKSDB[$linkdate];
765 $l['formatedDescription'] = format_description($l['description'], $GLOBALS['redirector']);
766 $l['thumbnail'] = thumbnail($l['url']);
767 $l_date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $l['linkdate']);
768 $l['timestamp'] = $l_date->getTimestamp();
769 if (startsWith($l['url'], '?')) {
770 $l['url'] = index_url($_SERVER) . $l['url']; // make permalink URL absolute
771 }
772 $links[$linkdate] = $l;
773 }
774
775 // Then build the HTML for this day:
776 $tpl = new RainTPL;
777 $tpl->assign('title', $GLOBALS['title']);
778 $tpl->assign('daydate', $dayDate->getTimestamp());
779 $tpl->assign('absurl', $absurl);
780 $tpl->assign('links', $links);
781 $tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
782 $html = $tpl->draw('dailyrss', $return_string=true);
783
784 echo $html . PHP_EOL;
785 }
786 echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
787
788 $cache->cache(ob_get_contents());
789 ob_end_flush();
790 exit;
791 }
792
793 /**
794 * Show the 'Daily' page.
795 *
796 * @param PageBuilder $pageBuilder Template engine wrapper.
797 * @param LinkDB $LINKSDB LinkDB instance.
798 */
799 function showDaily($pageBuilder, $LINKSDB)
800 {
801 $day=Date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
802 if (isset($_GET['day'])) $day=$_GET['day'];
803
804 $days = $LINKSDB->days();
805 $i = array_search($day,$days);
806 if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
807 $previousday='';
808 $nextday='';
809 if ($i!==false)
810 {
811 if ($i>=1) $previousday=$days[$i-1];
812 if ($i<count($days)-1) $nextday=$days[$i+1];
813 }
814
815 try {
816 $linksToDisplay = $LINKSDB->filterDay($day);
817 } catch (Exception $exc) {
818 error_log($exc);
819 $linksToDisplay = array();
820 }
821
822 // We pre-format some fields for proper output.
823 foreach($linksToDisplay as $key=>$link)
824 {
825
826 $taglist = explode(' ',$link['tags']);
827 uasort($taglist, 'strcasecmp');
828 $linksToDisplay[$key]['taglist']=$taglist;
829 $linksToDisplay[$key]['formatedDescription'] = format_description($link['description'], $GLOBALS['redirector']);
830 $linksToDisplay[$key]['thumbnail'] = thumbnail($link['url']);
831 $date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
832 $linksToDisplay[$key]['timestamp'] = $date->getTimestamp();
833 }
834
835 /* We need to spread the articles on 3 columns.
836 I did not want to use a JavaScript lib like http://masonry.desandro.com/
837 so I manually spread entries with a simple method: I roughly evaluate the
838 height of a div according to title and description length.
839 */
840 $columns=array(array(),array(),array()); // Entries to display, for each column.
841 $fill=array(0,0,0); // Rough estimate of columns fill.
842 foreach($linksToDisplay as $key=>$link)
843 {
844 // Roughly estimate length of entry (by counting characters)
845 // Title: 30 chars = 1 line. 1 line is 30 pixels height.
846 // Description: 836 characters gives roughly 342 pixel height.
847 // This is not perfect, but it's usually OK.
848 $length=strlen($link['title'])+(342*strlen($link['description']))/836;
849 if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
850 // Then put in column which is the less filled:
851 $smallest=min($fill); // find smallest value in array.
852 $index=array_search($smallest,$fill); // find index of this smallest value.
853 array_push($columns[$index],$link); // Put entry in this column.
854 $fill[$index]+=$length;
855 }
856
857 $dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
858 $data = array(
859 'linksToDisplay' => $linksToDisplay,
860 'linkcount' => count($LINKSDB),
861 'cols' => $columns,
862 'day' => $dayDate->getTimestamp(),
863 'previousday' => $previousday,
864 'nextday' => $nextday,
865 );
866 $pluginManager = PluginManager::getInstance();
867 $pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
868
869 foreach ($data as $key => $value) {
870 $pageBuilder->assign($key, $value);
871 }
872
873 $pageBuilder->renderPage('daily');
874 exit;
875 }
876
877 // Renders the linklist
878 function showLinkList($PAGE, $LINKSDB) {
879 buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
880 $PAGE->renderPage('linklist');
881 }
882
883
884 // ------------------------------------------------------------------------------------------
885 // Render HTML page (according to URL parameters and user rights)
886 function renderPage()
887 {
888 $LINKSDB = new LinkDB(
889 $GLOBALS['config']['DATASTORE'],
890 isLoggedIn(),
891 $GLOBALS['config']['HIDE_PUBLIC_LINKS'],
892 $GLOBALS['redirector'],
893 $GLOBALS['config']['REDIRECTOR_URLENCODE']
894 );
895
896 $updater = new Updater(
897 read_updates_file($GLOBALS['config']['UPDATES_FILE']),
898 $GLOBALS,
899 $LINKSDB,
900 isLoggedIn()
901 );
902 try {
903 $newUpdates = $updater->update();
904 if (! empty($newUpdates)) {
905 write_updates_file(
906 $GLOBALS['config']['UPDATES_FILE'],
907 $updater->getDoneUpdates()
908 );
909 }
910 }
911 catch(Exception $e) {
912 die($e->getMessage());
913 }
914
915 $PAGE = new pageBuilder;
916
917 // Determine which page will be rendered.
918 $query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
919 $targetPage = Router::findPage($query, $_GET, isLoggedIn());
920
921 // Call plugin hooks for header, footer and includes, specifying which page will be rendered.
922 // Then assign generated data to RainTPL.
923 $common_hooks = array(
924 'includes',
925 'header',
926 'footer',
927 );
928 $pluginManager = PluginManager::getInstance();
929 foreach($common_hooks as $name) {
930 $plugin_data = array();
931 $pluginManager->executeHooks('render_' . $name, $plugin_data,
932 array(
933 'target' => $targetPage,
934 'loggedin' => isLoggedIn()
935 )
936 );
937 $PAGE->assign('plugins_' . $name, $plugin_data);
938 }
939
940 // -------- Display login form.
941 if ($targetPage == Router::$PAGE_LOGIN)
942 {
943 if ($GLOBALS['config']['OPEN_SHAARLI']) { header('Location: ?'); exit; } // No need to login for open Shaarli
944 $token=''; if (ban_canLogin()) $token=getToken(); // Do not waste token generation if not useful.
945 $PAGE->assign('token',$token);
946 $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
947 $PAGE->renderPage('loginform');
948 exit;
949 }
950 // -------- User wants to logout.
951 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=logout'))
952 {
953 invalidateCaches($GLOBALS['config']['PAGECACHE']);
954 logout();
955 header('Location: ?');
956 exit;
957 }
958
959 // -------- Picture wall
960 if ($targetPage == Router::$PAGE_PICWALL)
961 {
962 // Optionally filter the results:
963 $links = $LINKSDB->filterSearch($_GET);
964 $linksToDisplay = array();
965
966 // Get only links which have a thumbnail.
967 foreach($links as $link)
968 {
969 $permalink='?'.escape(smallhash($link['linkdate']));
970 $thumb=lazyThumbnail($link['url'],$permalink);
971 if ($thumb!='') // Only output links which have a thumbnail.
972 {
973 $link['thumbnail']=$thumb; // Thumbnail HTML code.
974 $linksToDisplay[]=$link; // Add to array.
975 }
976 }
977
978 $data = array(
979 'linkcount' => count($LINKSDB),
980 'linksToDisplay' => $linksToDisplay,
981 );
982 $pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
983
984 foreach ($data as $key => $value) {
985 $PAGE->assign($key, $value);
986 }
987
988 $PAGE->renderPage('picwall');
989 exit;
990 }
991
992 // -------- Tag cloud
993 if ($targetPage == Router::$PAGE_TAGCLOUD)
994 {
995 $tags= $LINKSDB->allTags();
996
997 // We sort tags alphabetically, then choose a font size according to count.
998 // First, find max value.
999 $maxcount = 0;
1000 foreach ($tags as $value) {
1001 $maxcount = max($maxcount, $value);
1002 }
1003
1004 // Sort tags alphabetically: case insensitive, support locale if avalaible.
1005 uksort($tags, function($a, $b) {
1006 // Collator is part of PHP intl.
1007 if (class_exists('Collator')) {
1008 $c = new Collator(setlocale(LC_COLLATE, 0));
1009 if (!intl_is_failure(intl_get_error_code())) {
1010 return $c->compare($a, $b);
1011 }
1012 }
1013 return strcasecmp($a, $b);
1014 });
1015
1016 $tagList = array();
1017 foreach($tags as $key => $value) {
1018 // Tag font size scaling:
1019 // default 15 and 30 logarithm bases affect scaling,
1020 // 22 and 6 are arbitrary font sizes for max and min sizes.
1021 $size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
1022 $tagList[$key] = array(
1023 'count' => $value,
1024 'size' => number_format($size, 2, '.', ''),
1025 );
1026 }
1027
1028 $data = array(
1029 'linkcount' => count($LINKSDB),
1030 'tags' => $tagList,
1031 );
1032 $pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
1033
1034 foreach ($data as $key => $value) {
1035 $PAGE->assign($key, $value);
1036 }
1037
1038 $PAGE->renderPage('tagcloud');
1039 exit;
1040 }
1041
1042 // Daily page.
1043 if ($targetPage == Router::$PAGE_DAILY) {
1044 showDaily($PAGE, $LINKSDB);
1045 }
1046
1047 // ATOM and RSS feed.
1048 if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
1049 $feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
1050 header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
1051
1052 // Cache system
1053 $query = $_SERVER['QUERY_STRING'];
1054 $cache = new CachedPage(
1055 $GLOBALS['config']['PAGECACHE'],
1056 page_url($_SERVER),
1057 startsWith($query,'do='. $targetPage) && !isLoggedIn()
1058 );
1059 $cached = $cache->cachedVersion();
1060 if (!empty($cached)) {
1061 echo $cached;
1062 exit;
1063 }
1064
1065 // Generate data.
1066 $feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
1067 $feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
1068 $feedGenerator->setHideDates($GLOBALS['config']['HIDE_TIMESTAMPS'] && !isLoggedIn());
1069 $feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS']);
1070 if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) {
1071 $feedGenerator->setPubsubhubUrl($GLOBALS['config']['PUBSUBHUB_URL']);
1072 }
1073 $data = $feedGenerator->buildData();
1074
1075 // Process plugin hook.
1076 $pluginManager = PluginManager::getInstance();
1077 $pluginManager->executeHooks('render_feed', $data, array(
1078 'loggedin' => isLoggedIn(),
1079 'target' => $targetPage,
1080 ));
1081
1082 // Render the template.
1083 $PAGE->assignAll($data);
1084 $PAGE->renderPage('feed.'. $feedType);
1085 $cache->cache(ob_get_contents());
1086 ob_end_flush();
1087 exit;
1088 }
1089
1090 // Display openseach plugin (XML)
1091 if ($targetPage == Router::$PAGE_OPENSEARCH) {
1092 header('Content-Type: application/xml; charset=utf-8');
1093 $PAGE->assign('serverurl', index_url($_SERVER));
1094 $PAGE->renderPage('opensearch');
1095 exit;
1096 }
1097
1098 // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
1099 if (isset($_GET['addtag']))
1100 {
1101 // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
1102 if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
1103 parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
1104
1105 // Prevent redirection loop
1106 if (isset($params['addtag'])) {
1107 unset($params['addtag']);
1108 }
1109
1110 // Check if this tag is already in the search query and ignore it if it is.
1111 // Each tag is always separated by a space
1112 if (isset($params['searchtags'])) {
1113 $current_tags = explode(' ', $params['searchtags']);
1114 } else {
1115 $current_tags = array();
1116 }
1117 $addtag = true;
1118 foreach ($current_tags as $value) {
1119 if ($value === $_GET['addtag']) {
1120 $addtag = false;
1121 break;
1122 }
1123 }
1124 // Append the tag if necessary
1125 if (empty($params['searchtags'])) {
1126 $params['searchtags'] = trim($_GET['addtag']);
1127 }
1128 else if ($addtag) {
1129 $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
1130 }
1131
1132 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1133 header('Location: ?'.http_build_query($params));
1134 exit;
1135 }
1136
1137 // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
1138 if (isset($_GET['removetag'])) {
1139 // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
1140 if (empty($_SERVER['HTTP_REFERER'])) {
1141 header('Location: ?');
1142 exit;
1143 }
1144
1145 // In case browser does not send HTTP_REFERER
1146 parse_str(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY), $params);
1147
1148 // Prevent redirection loop
1149 if (isset($params['removetag'])) {
1150 unset($params['removetag']);
1151 }
1152
1153 if (isset($params['searchtags'])) {
1154 $tags = explode(' ', $params['searchtags']);
1155 // Remove value from array $tags.
1156 $tags = array_diff($tags, array($_GET['removetag']));
1157 $params['searchtags'] = implode(' ',$tags);
1158
1159 if (empty($params['searchtags'])) {
1160 unset($params['searchtags']);
1161 }
1162
1163 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1164 }
1165 header('Location: ?'.http_build_query($params));
1166 exit;
1167 }
1168
1169 // -------- User wants to change the number of links per page (linksperpage=...)
1170 if (isset($_GET['linksperpage'])) {
1171 if (is_numeric($_GET['linksperpage'])) {
1172 $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
1173 }
1174
1175 header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage')));
1176 exit;
1177 }
1178
1179 // -------- User wants to see only private links (toggle)
1180 if (isset($_GET['privateonly'])) {
1181 if (empty($_SESSION['privateonly'])) {
1182 $_SESSION['privateonly'] = 1; // See only private links
1183 } else {
1184 unset($_SESSION['privateonly']); // See all links
1185 }
1186
1187 header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly')));
1188 exit;
1189 }
1190
1191 // -------- Handle other actions allowed for non-logged in users:
1192 if (!isLoggedIn())
1193 {
1194 // User tries to post new link but is not logged in:
1195 // Show login screen, then redirect to ?post=...
1196 if (isset($_GET['post']))
1197 {
1198 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($_GET['source']):'')); // Redirect to login page, then back to post link.
1199 exit;
1200 }
1201
1202 showLinkList($PAGE, $LINKSDB);
1203 if (isset($_GET['edit_link'])) {
1204 header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
1205 exit;
1206 }
1207
1208 exit; // Never remove this one! All operations below are reserved for logged in user.
1209 }
1210
1211 // -------- All other functions are reserved for the registered user:
1212
1213 // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1214 if ($targetPage == Router::$PAGE_TOOLS)
1215 {
1216 $data = array(
1217 'linkcount' => count($LINKSDB),
1218 'pageabsaddr' => index_url($_SERVER),
1219 );
1220 $pluginManager->executeHooks('render_tools', $data);
1221
1222 foreach ($data as $key => $value) {
1223 $PAGE->assign($key, $value);
1224 }
1225
1226 $PAGE->renderPage('tools');
1227 exit;
1228 }
1229
1230 // -------- User wants to change his/her password.
1231 if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
1232 {
1233 if ($GLOBALS['config']['OPEN_SHAARLI']) die('You are not supposed to change a password on an Open Shaarli.');
1234 if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1235 {
1236 if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1237
1238 // Make sure old password is correct.
1239 $oldhash = sha1($_POST['oldpassword'].$GLOBALS['login'].$GLOBALS['salt']);
1240 if ($oldhash!=$GLOBALS['hash']) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1241 // Save new password
1242 $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
1243 $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
1244 try {
1245 writeConfig($GLOBALS, isLoggedIn());
1246 }
1247 catch(Exception $e) {
1248 error_log(
1249 'ERROR while writing config file after changing password.' . PHP_EOL .
1250 $e->getMessage()
1251 );
1252
1253 // TODO: do not handle exceptions/errors in JS.
1254 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1255 exit;
1256 }
1257 echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1258 exit;
1259 }
1260 else // show the change password form.
1261 {
1262 $PAGE->assign('linkcount',count($LINKSDB));
1263 $PAGE->assign('token',getToken());
1264 $PAGE->renderPage('changepassword');
1265 exit;
1266 }
1267 }
1268
1269 // -------- User wants to change configuration
1270 if ($targetPage == Router::$PAGE_CONFIGURE)
1271 {
1272 if (!empty($_POST['title']) )
1273 {
1274 if (!tokenOk($_POST['token'])) {
1275 die('Wrong token.'); // Go away!
1276 }
1277 $tz = 'UTC';
1278 if (!empty($_POST['continent']) && !empty($_POST['city'])
1279 && isTimeZoneValid($_POST['continent'], $_POST['city'])
1280 ) {
1281 $tz = $_POST['continent'] . '/' . $_POST['city'];
1282 }
1283 $GLOBALS['timezone'] = $tz;
1284 $GLOBALS['title']=$_POST['title'];
1285 $GLOBALS['titleLink']=$_POST['titleLink'];
1286 $GLOBALS['redirector']=$_POST['redirector'];
1287 $GLOBALS['disablesessionprotection']=!empty($_POST['disablesessionprotection']);
1288 $GLOBALS['privateLinkByDefault']=!empty($_POST['privateLinkByDefault']);
1289 $GLOBALS['config']['ENABLE_RSS_PERMALINKS']= !empty($_POST['enableRssPermalinks']);
1290 $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
1291 $GLOBALS['config']['HIDE_PUBLIC_LINKS'] = !empty($_POST['hidePublicLinks']);
1292 try {
1293 writeConfig($GLOBALS, isLoggedIn());
1294 }
1295 catch(Exception $e) {
1296 error_log(
1297 'ERROR while writing config file after configuration update.' . PHP_EOL .
1298 $e->getMessage()
1299 );
1300
1301 // TODO: do not handle exceptions/errors in JS.
1302 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
1303 exit;
1304 }
1305 echo '<script>alert("Configuration was saved.");document.location=\'?do=tools\';</script>';
1306 exit;
1307 }
1308 else // Show the configuration form.
1309 {
1310 $PAGE->assign('linkcount',count($LINKSDB));
1311 $PAGE->assign('token',getToken());
1312 $PAGE->assign('title', empty($GLOBALS['title']) ? '' : $GLOBALS['title'] );
1313 $PAGE->assign('redirector', empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'] );
1314 list($timezone_form, $timezone_js) = generateTimeZoneForm($GLOBALS['timezone']);
1315 $PAGE->assign('timezone_form', $timezone_form);
1316 $PAGE->assign('timezone_js',$timezone_js);
1317 $PAGE->renderPage('configure');
1318 exit;
1319 }
1320 }
1321
1322 // -------- User wants to rename a tag or delete it
1323 if ($targetPage == Router::$PAGE_CHANGETAG)
1324 {
1325 if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
1326 $PAGE->assign('linkcount', count($LINKSDB));
1327 $PAGE->assign('token', getToken());
1328 $PAGE->assign('tags', $LINKSDB->allTags());
1329 $PAGE->renderPage('changetag');
1330 exit;
1331 }
1332
1333 if (!tokenOk($_POST['token'])) {
1334 die('Wrong token.');
1335 }
1336
1337 // Delete a tag:
1338 if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
1339 $needle = trim($_POST['fromtag']);
1340 // True for case-sensitive tag search.
1341 $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1342 foreach($linksToAlter as $key=>$value)
1343 {
1344 $tags = explode(' ',trim($value['tags']));
1345 unset($tags[array_search($needle,$tags)]); // Remove tag.
1346 $value['tags']=trim(implode(' ',$tags));
1347 $LINKSDB[$key]=$value;
1348 }
1349 $LINKSDB->savedb($GLOBALS['config']['PAGECACHE']);
1350 echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
1351 exit;
1352 }
1353
1354 // Rename a tag:
1355 if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
1356 $needle = trim($_POST['fromtag']);
1357 // True for case-sensitive tag search.
1358 $linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
1359 foreach($linksToAlter as $key=>$value)
1360 {
1361 $tags = explode(' ',trim($value['tags']));
1362 $tags[array_search($needle,$tags)] = trim($_POST['totag']); // Replace tags value.
1363 $value['tags']=trim(implode(' ',$tags));
1364 $LINKSDB[$key]=$value;
1365 }
1366 $LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // Save to disk.
1367 echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>';
1368 exit;
1369 }
1370 }
1371
1372 // -------- User wants to add a link without using the bookmarklet: Show form.
1373 if ($targetPage == Router::$PAGE_ADDLINK)
1374 {
1375 $PAGE->assign('linkcount',count($LINKSDB));
1376 $PAGE->renderPage('addlink');
1377 exit;
1378 }
1379
1380 // -------- User clicked the "Save" button when editing a link: Save link to database.
1381 if (isset($_POST['save_edit']))
1382 {
1383 // Go away!
1384 if (! tokenOk($_POST['token'])) {
1385 die('Wrong token.');
1386 }
1387 // Remove multiple spaces.
1388 $tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
1389 // Remove first '-' char in tags.
1390 $tags = preg_replace('/(^| )\-/', '$1', $tags);
1391 // Remove duplicates.
1392 $tags = implode(' ', array_unique(explode(' ', $tags)));
1393 $linkdate = $_POST['lf_linkdate'];
1394 $url = trim($_POST['lf_url']);
1395 if (! startsWith($url, 'http:') && ! startsWith($url, 'https:')
1396 && ! startsWith($url, 'ftp:') && ! startsWith($url, 'magnet:')
1397 && ! startsWith($url, '?') && ! startsWith($url, 'javascript:')
1398 ) {
1399 $url = 'http://' . $url;
1400 }
1401
1402 $link = array(
1403 'title' => trim($_POST['lf_title']),
1404 'url' => $url,
1405 'description' => $_POST['lf_description'],
1406 'private' => (isset($_POST['lf_private']) ? 1 : 0),
1407 'linkdate' => $linkdate,
1408 'tags' => str_replace(',', ' ', $tags)
1409 );
1410 // If title is empty, use the URL as title.
1411 if ($link['title'] == '') {
1412 $link['title'] = $link['url'];
1413 }
1414
1415 $pluginManager->executeHooks('save_link', $link);
1416
1417 $LINKSDB[$linkdate] = $link;
1418 $LINKSDB->savedb($GLOBALS['config']['PAGECACHE']);
1419 pubsubhub();
1420
1421 // If we are called from the bookmarklet, we must close the popup:
1422 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
1423 echo '<script>self.close();</script>';
1424 exit;
1425 }
1426
1427 $returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
1428 $location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1429 // Scroll to the link which has been edited.
1430 $location .= '#' . smallHash($_POST['lf_linkdate']);
1431 // After saving the link, redirect to the page the user was on.
1432 header('Location: '. $location);
1433 exit;
1434 }
1435
1436 // -------- User clicked the "Cancel" button when editing a link.
1437 if (isset($_POST['cancel_edit']))
1438 {
1439 // If we are called from the bookmarklet, we must close the popup:
1440 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1441 $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1442 $returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited.
1443 $returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
1444 header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1445 exit;
1446 }
1447
1448 // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1449 if (isset($_POST['delete_link']))
1450 {
1451 if (!tokenOk($_POST['token'])) die('Wrong token.');
1452 // We do not need to ask for confirmation:
1453 // - confirmation is handled by JavaScript
1454 // - we are protected from XSRF by the token.
1455 $linkdate=$_POST['lf_linkdate'];
1456
1457 $pluginManager->executeHooks('delete_link', $LINKSDB[$linkdate]);
1458
1459 unset($LINKSDB[$linkdate]);
1460 $LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // save to disk
1461
1462 // If we are called from the bookmarklet, we must close the popup:
1463 if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
1464 // Pick where we're going to redirect
1465 // =============================================================
1466 // Basically, we can't redirect to where we were previously if it was a permalink
1467 // or an edit_link, because it would 404.
1468 // Cases:
1469 // - / : nothing in $_GET, redirect to self
1470 // - /?page : redirect to self
1471 // - /?searchterm : redirect to self (there might be other links)
1472 // - /?searchtags : redirect to self
1473 // - /permalink : redirect to / (the link does not exist anymore)
1474 // - /?edit_link : redirect to / (the link does not exist anymore)
1475 // PHP treats the permalink as a $_GET variable, so we need to check if every condition for self
1476 // redirect is not satisfied, and only then redirect to /
1477 $location = "?";
1478 // Self redirection
1479 if (count($_GET) == 0
1480 || isset($_GET['page'])
1481 || isset($_GET['searchterm'])
1482 || isset($_GET['searchtags'])
1483 ) {
1484 if (isset($_POST['returnurl'])) {
1485 $location = $_POST['returnurl']; // Handle redirects given by the form
1486 } else {
1487 $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('delete_link'));
1488 }
1489 }
1490
1491 header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1492 exit;
1493 }
1494
1495 // -------- User clicked the "EDIT" button on a link: Display link edit form.
1496 if (isset($_GET['edit_link']))
1497 {
1498 $link = $LINKSDB[$_GET['edit_link']]; // Read database
1499 if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1500 $data = array(
1501 'linkcount' => count($LINKSDB),
1502 'link' => $link,
1503 'link_is_new' => false,
1504 'token' => getToken(),
1505 'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1506 'tags' => $LINKSDB->allTags(),
1507 );
1508 $pluginManager->executeHooks('render_editlink', $data);
1509
1510 foreach ($data as $key => $value) {
1511 $PAGE->assign($key, $value);
1512 }
1513
1514 $PAGE->renderPage('editlink');
1515 exit;
1516 }
1517
1518 // -------- User want to post a new link: Display link edit form.
1519 if (isset($_GET['post'])) {
1520 $url = cleanup_url($_GET['post']);
1521
1522 $link_is_new = false;
1523 // Check if URL is not already in database (in this case, we will edit the existing link)
1524 $link = $LINKSDB->getLinkFromUrl($url);
1525 if (!$link)
1526 {
1527 $link_is_new = true;
1528 $linkdate = strval(date('Ymd_His'));
1529 // Get title if it was provided in URL (by the bookmarklet).
1530 $title = empty($_GET['title']) ? '' : escape($_GET['title']);
1531 // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1532 $description = empty($_GET['description']) ? '' : escape($_GET['description']);
1533 $tags = empty($_GET['tags']) ? '' : escape($_GET['tags']);
1534 $private = !empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0;
1535 // If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1536 if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
1537 // Short timeout to keep the application responsive
1538 list($headers, $content) = get_http_response($url, 4);
1539 if (strpos($headers[0], '200 OK') !== false) {
1540 // Retrieve charset.
1541 $charset = get_charset($headers, $content);
1542 // Extract title.
1543 $title = html_extract_title($content);
1544 // Re-encode title in utf-8 if necessary.
1545 if (! empty($title) && strtolower($charset) != 'utf-8') {
1546 $title = mb_convert_encoding($title, 'utf-8', $charset);
1547 }
1548 }
1549 }
1550
1551 if ($url == '') {
1552 $url = '?' . smallHash($linkdate);
1553 $title = 'Note: ';
1554 }
1555 $url = escape($url);
1556 $title = escape($title);
1557
1558 $link = array(
1559 'linkdate' => $linkdate,
1560 'title' => $title,
1561 'url' => $url,
1562 'description' => $description,
1563 'tags' => $tags,
1564 'private' => $private
1565 );
1566 }
1567
1568 $data = array(
1569 'linkcount' => count($LINKSDB),
1570 'link' => $link,
1571 'link_is_new' => $link_is_new,
1572 'token' => getToken(), // XSRF protection.
1573 'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
1574 'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
1575 'tags' => $LINKSDB->allTags(),
1576 );
1577 $pluginManager->executeHooks('render_editlink', $data);
1578
1579 foreach ($data as $key => $value) {
1580 $PAGE->assign($key, $value);
1581 }
1582
1583 $PAGE->renderPage('editlink');
1584 exit;
1585 }
1586
1587 if ($targetPage == Router::$PAGE_EXPORT) {
1588 // Export links as a Netscape Bookmarks file
1589
1590 if (empty($_GET['selection'])) {
1591 $PAGE->assign('linkcount',count($LINKSDB));
1592 $PAGE->renderPage('export');
1593 exit;
1594 }
1595
1596 // export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
1597 $selection = $_GET['selection'];
1598 if (isset($_GET['prepend_note_url'])) {
1599 $prependNoteUrl = $_GET['prepend_note_url'];
1600 } else {
1601 $prependNoteUrl = false;
1602 }
1603
1604 try {
1605 $PAGE->assign(
1606 'links',
1607 NetscapeBookmarkUtils::filterAndFormat(
1608 $LINKSDB,
1609 $selection,
1610 $prependNoteUrl,
1611 index_url($_SERVER)
1612 )
1613 );
1614 } catch (Exception $exc) {
1615 header('Content-Type: text/plain; charset=utf-8');
1616 echo $exc->getMessage();
1617 exit;
1618 }
1619 $now = new DateTime();
1620 header('Content-Type: text/html; charset=utf-8');
1621 header(
1622 'Content-disposition: attachment; filename=bookmarks_'
1623 .$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
1624 );
1625 $PAGE->assign('date', $now->format(DateTime::RFC822));
1626 $PAGE->assign('eol', PHP_EOL);
1627 $PAGE->assign('selection', $selection);
1628 $PAGE->renderPage('export.bookmarks');
1629 exit;
1630 }
1631
1632 // -------- User is uploading a file for import
1633 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=upload'))
1634 {
1635 // If file is too big, some form field may be missing.
1636 if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
1637 {
1638 $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
1639 echo '<script>alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.escape($returnurl).'\';</script>';
1640 exit;
1641 }
1642 if (!tokenOk($_POST['token'])) die('Wrong token.');
1643 importFile($LINKSDB);
1644 exit;
1645 }
1646
1647 // -------- Show upload/import dialog:
1648 if ($targetPage == Router::$PAGE_IMPORT)
1649 {
1650 $PAGE->assign('linkcount',count($LINKSDB));
1651 $PAGE->assign('token',getToken());
1652 $PAGE->assign('maxfilesize',getMaxFileSize());
1653 $PAGE->renderPage('import');
1654 exit;
1655 }
1656
1657 // Plugin administration page
1658 if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
1659 $pluginMeta = $pluginManager->getPluginsMeta();
1660
1661 // Split plugins into 2 arrays: ordered enabled plugins and disabled.
1662 $enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
1663 // Load parameters.
1664 $enabledPlugins = load_plugin_parameter_values($enabledPlugins, $GLOBALS['plugins']);
1665 uasort(
1666 $enabledPlugins,
1667 function($a, $b) { return $a['order'] - $b['order']; }
1668 );
1669 $disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
1670
1671 $PAGE->assign('enabledPlugins', $enabledPlugins);
1672 $PAGE->assign('disabledPlugins', $disabledPlugins);
1673 $PAGE->renderPage('pluginsadmin');
1674 exit;
1675 }
1676
1677 // Plugin administration form action
1678 if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
1679 try {
1680 if (isset($_POST['parameters_form'])) {
1681 unset($_POST['parameters_form']);
1682 foreach ($_POST as $param => $value) {
1683 $GLOBALS['plugins'][$param] = escape($value);
1684 }
1685 }
1686 else {
1687 $GLOBALS['config']['ENABLED_PLUGINS'] = save_plugin_config($_POST);
1688 }
1689 writeConfig($GLOBALS, isLoggedIn());
1690 }
1691 catch (Exception $e) {
1692 error_log(
1693 'ERROR while saving plugin configuration:.' . PHP_EOL .
1694 $e->getMessage()
1695 );
1696
1697 // TODO: do not handle exceptions/errors in JS.
1698 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
1699 exit;
1700 }
1701 header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
1702 exit;
1703 }
1704
1705 // -------- Otherwise, simply display search form and links:
1706 showLinkList($PAGE, $LINKSDB);
1707 exit;
1708 }
1709
1710 // -----------------------------------------------------------------------------------------------
1711 // Process the import file form.
1712 function importFile($LINKSDB)
1713 {
1714 if (!isLoggedIn()) { die('Not allowed.'); }
1715
1716 $filename=$_FILES['filetoupload']['name'];
1717 $filesize=$_FILES['filetoupload']['size'];
1718 $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
1719 $private = (empty($_POST['private']) ? 0 : 1); // Should the links be imported as private?
1720 $overwrite = !empty($_POST['overwrite']) ; // Should the imported links overwrite existing ones?
1721 $import_count=0;
1722
1723 // Sniff file type:
1724 $type='unknown';
1725 if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
1726
1727 // Then import the bookmarks.
1728 if ($type=='netscape')
1729 {
1730 // This is a standard Netscape-style bookmark file.
1731 // This format is supported by all browsers (except IE, of course), also Delicious, Diigo and others.
1732 foreach(explode('<DT>',$data) as $html) // explode is very fast
1733 {
1734 $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);
1735 $d = explode('<DD>',$html);
1736 if (startswith($d[0],'<A '))
1737 {
1738 $link['description'] = (isset($d[1]) ? html_entity_decode(trim($d[1]),ENT_QUOTES,'UTF-8') : ''); // Get description (optional)
1739 preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : ''); // Get title
1740 $link['title'] = html_entity_decode($link['title'],ENT_QUOTES,'UTF-8');
1741 preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER); // Get all other attributes
1742 $raw_add_date=0;
1743 foreach($matches as $m)
1744 {
1745 $attr=$m[1]; $value=$m[2];
1746 if ($attr=='HREF') $link['url']=html_entity_decode($value,ENT_QUOTES,'UTF-8');
1747 elseif ($attr=='ADD_DATE')
1748 {
1749 $raw_add_date=intval($value);
1750 if ($raw_add_date>30000000000) $raw_add_date/=1000; //If larger than year 2920, then was likely stored in milliseconds instead of seconds
1751 }
1752 elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
1753 elseif ($attr=='TAGS') $link['tags']=html_entity_decode(str_replace(',',' ',$value),ENT_QUOTES,'UTF-8');
1754 }
1755 if ($link['url']!='')
1756 {
1757 if ($private==1) $link['private']=1;
1758 $dblink = $LINKSDB->getLinkFromUrl($link['url']); // See if the link is already in database.
1759 if ($dblink==false)
1760 { // Link not in database, let's import it...
1761 if (empty($raw_add_date)) $raw_add_date=time(); // In case of shitty bookmark file with no ADD_DATE
1762
1763 // Make sure date/time is not already used by another link.
1764 // (Some bookmark files have several different links with the same ADD_DATE)
1765 // We increment date by 1 second until we find a date which is not used in DB.
1766 // (so that links that have the same date/time are more or less kept grouped by date, but do not conflict.)
1767 while (!empty($LINKSDB[date('Ymd_His',$raw_add_date)])) { $raw_add_date++; }// Yes, I know it's ugly.
1768 $link['linkdate']=date('Ymd_His',$raw_add_date);
1769 $LINKSDB[$link['linkdate']] = $link;
1770 $import_count++;
1771 }
1772 else // Link already present in database.
1773 {
1774 if ($overwrite)
1775 { // If overwrite is required, we import link data, except date/time.
1776 $link['linkdate']=$dblink['linkdate'];
1777 $LINKSDB[$link['linkdate']] = $link;
1778 $import_count++;
1779 }
1780 }
1781
1782 }
1783 }
1784 }
1785 $LINKSDB->savedb($GLOBALS['config']['PAGECACHE']);
1786
1787 echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) was successfully processed: '.$import_count.' links imported.");document.location=\'?\';</script>';
1788 }
1789 else
1790 {
1791 echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
1792 }
1793 }
1794
1795 /**
1796 * Template for the list of links (<div id="linklist">)
1797 * This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1798 *
1799 * @param pageBuilder $PAGE pageBuilder instance.
1800 * @param LinkDB $LINKSDB LinkDB instance.
1801 */
1802 function buildLinkList($PAGE,$LINKSDB)
1803 {
1804 // Used in templates
1805 $searchtags = !empty($_GET['searchtags']) ? escape($_GET['searchtags']) : '';
1806 $searchterm = !empty($_GET['searchterm']) ? escape($_GET['searchterm']) : '';
1807
1808 // Smallhash filter
1809 if (! empty($_SERVER['QUERY_STRING'])
1810 && preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
1811 try {
1812 $linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
1813 } catch (LinkNotFoundException $e) {
1814 $PAGE->render404($e->getMessage());
1815 exit;
1816 }
1817 } else {
1818 // Filter links according search parameters.
1819 $privateonly = !empty($_SESSION['privateonly']);
1820 $linksToDisplay = $LINKSDB->filterSearch($_GET, false, $privateonly);
1821 }
1822
1823 // ---- Handle paging.
1824 $keys = array();
1825 foreach ($linksToDisplay as $key => $value) {
1826 $keys[] = $key;
1827 }
1828
1829 // If there is only a single link, we change on-the-fly the title of the page.
1830 if (count($linksToDisplay) == 1) {
1831 $GLOBALS['pagetitle'] = $linksToDisplay[$keys[0]]['title'].' - '.$GLOBALS['title'];
1832 }
1833
1834 // Select articles according to paging.
1835 $pagecount = ceil(count($keys) / $_SESSION['LINKS_PER_PAGE']);
1836 $pagecount = $pagecount == 0 ? 1 : $pagecount;
1837 $page= empty($_GET['page']) ? 1 : intval($_GET['page']);
1838 $page = $page < 1 ? 1 : $page;
1839 $page = $page > $pagecount ? $pagecount : $page;
1840 // Start index.
1841 $i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
1842 $end = $i + $_SESSION['LINKS_PER_PAGE'];
1843 $linkDisp = array();
1844 while ($i<$end && $i<count($keys))
1845 {
1846 $link = $linksToDisplay[$keys[$i]];
1847 $link['description'] = format_description($link['description'], $GLOBALS['redirector']);
1848 $classLi = ($i % 2) != 0 ? '' : 'publicLinkHightLight';
1849 $link['class'] = $link['private'] == 0 ? $classLi : 'private';
1850 $date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
1851 $link['timestamp'] = $date->getTimestamp();
1852 $taglist = explode(' ', $link['tags']);
1853 uasort($taglist, 'strcasecmp');
1854 $link['taglist'] = $taglist;
1855 $link['shorturl'] = smallHash($link['linkdate']);
1856 // Check for both signs of a note: starting with ? and 7 chars long.
1857 if ($link['url'][0] === '?' &&
1858 strlen($link['url']) === 7) {
1859 $link['url'] = index_url($_SERVER) . $link['url'];
1860 }
1861
1862 $linkDisp[$keys[$i]] = $link;
1863 $i++;
1864 }
1865
1866 // Compute paging navigation
1867 $searchtagsUrl = empty($searchtags) ? '' : '&searchtags=' . urlencode($searchtags);
1868 $searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
1869 $previous_page_url = '';
1870 if ($i != count($keys)) {
1871 $previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
1872 }
1873 $next_page_url='';
1874 if ($page>1) {
1875 $next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
1876 }
1877
1878 $token = isLoggedIn() ? getToken() : '';
1879
1880 // Fill all template fields.
1881 $data = array(
1882 'linkcount' => count($LINKSDB),
1883 'previous_page_url' => $previous_page_url,
1884 'next_page_url' => $next_page_url,
1885 'page_current' => $page,
1886 'page_max' => $pagecount,
1887 'result_count' => count($linksToDisplay),
1888 'search_term' => $searchterm,
1889 'search_tags' => $searchtags,
1890 'redirector' => empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'], // Optional redirector URL.
1891 'token' => $token,
1892 'links' => $linkDisp,
1893 'tags' => $LINKSDB->allTags(),
1894 );
1895 // FIXME! temporary fix - see #399.
1896 if (!empty($GLOBALS['pagetitle']) && count($linkDisp) == 1) {
1897 $data['pagetitle'] = $GLOBALS['pagetitle'];
1898 }
1899
1900 $pluginManager = PluginManager::getInstance();
1901 $pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
1902
1903 foreach ($data as $key => $value) {
1904 $PAGE->assign($key, $value);
1905 }
1906
1907 return;
1908 }
1909
1910 // Compute the thumbnail for a link.
1911 //
1912 // With a link to the original URL.
1913 // Understands various services (youtube.com...)
1914 // Input: $url = URL for which the thumbnail must be found.
1915 // $href = if provided, this URL will be followed instead of $url
1916 // Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1917 // Some of them may be missing.
1918 // Return an empty array if no thumbnail available.
1919 function computeThumbnail($url,$href=false)
1920 {
1921 if (!$GLOBALS['config']['ENABLE_THUMBNAILS']) return array();
1922 if ($href==false) $href=$url;
1923
1924 // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1925 // (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1926 // ^^^^^^^^^^^ ^^^^^^^^^^^
1927 $domain = parse_url($url,PHP_URL_HOST);
1928 if ($domain=='youtube.com' || $domain=='www.youtube.com')
1929 {
1930 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1931 if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1932 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1933 }
1934 if ($domain=='youtu.be') // Youtube short links
1935 {
1936 $path = parse_url($url,PHP_URL_PATH);
1937 return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
1938 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1939 }
1940 if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
1941 {
1942 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
1943 if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
1944 'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
1945 }
1946
1947 if ($domain=='imgur.com')
1948 {
1949 $path = parse_url($url,PHP_URL_PATH);
1950 if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
1951 if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
1952 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1953 if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
1954 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1955
1956 if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
1957 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1958 }
1959 if ($domain=='i.imgur.com')
1960 {
1961 $pi = pathinfo(parse_url($url,PHP_URL_PATH));
1962 if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
1963 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
1964 }
1965 if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
1966 {
1967 if (strpos($url,'dailymotion.com/video/')!==false)
1968 {
1969 $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
1970 return array('src'=>$thumburl,
1971 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
1972 }
1973 }
1974 if (endsWith($domain,'.imageshack.us'))
1975 {
1976 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
1977 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
1978 {
1979 $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
1980 return array('src'=>$thumburl,
1981 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
1982 }
1983 }
1984
1985 // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
1986 // So we deport the thumbnail generation in order not to slow down page generation
1987 // (and we also cache the thumbnail)
1988
1989 if (!$GLOBALS['config']['ENABLE_LOCALCACHE']) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
1990
1991 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
1992 || $domain=='vimeo.com'
1993 || $domain=='ted.com' || endsWith($domain,'.ted.com')
1994 || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
1995 )
1996 {
1997 if ($domain=='vimeo.com')
1998 { // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
1999 $path = parse_url($url,PHP_URL_PATH);
2000 if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
2001 }
2002 if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2003 { // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
2004 $path = parse_url($url,PHP_URL_PATH);
2005 if (!preg_match('!/\d+.+?!',$path)) return array();
2006 }
2007 if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2008 { // Make sure this TED URL points to a video (/talks/...)
2009 $path = parse_url($url,PHP_URL_PATH);
2010 if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
2011 }
2012 $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
2013 return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
2014 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
2015 }
2016
2017 // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
2018 // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
2019 // But using the extension will do.
2020 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
2021 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
2022 {
2023 $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
2024 return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
2025 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
2026 }
2027 return array(); // No thumbnail.
2028
2029 }
2030
2031
2032 // Returns the HTML code to display a thumbnail for a link
2033 // with a link to the original URL.
2034 // Understands various services (youtube.com...)
2035 // Input: $url = URL for which the thumbnail must be found.
2036 // $href = if provided, this URL will be followed instead of $url
2037 // Returns '' if no thumbnail available.
2038 function thumbnail($url,$href=false)
2039 {
2040 $t = computeThumbnail($url,$href);
2041 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
2042
2043 $html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
2044 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
2045 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
2046 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
2047 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
2048 $html.='></a>';
2049 return $html;
2050 }
2051
2052 // Returns the HTML code to display a thumbnail for a link
2053 // for the picture wall (using lazy image loading)
2054 // Understands various services (youtube.com...)
2055 // Input: $url = URL for which the thumbnail must be found.
2056 // $href = if provided, this URL will be followed instead of $url
2057 // Returns '' if no thumbnail available.
2058 function lazyThumbnail($url,$href=false)
2059 {
2060 $t = computeThumbnail($url,$href);
2061 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
2062
2063 $html='<a href="'.escape($t['href']).'">';
2064
2065 // Lazy image
2066 $html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
2067
2068 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
2069 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
2070 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
2071 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
2072 $html.='>';
2073
2074 // No-JavaScript fallback.
2075 $html.='<noscript><img src="'.escape($t['src']).'"';
2076 if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
2077 if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
2078 if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
2079 if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
2080 $html.='></noscript></a>';
2081
2082 return $html;
2083 }
2084
2085
2086 // -----------------------------------------------------------------------------------------------
2087 // Installation
2088 // This function should NEVER be called if the file data/config.php exists.
2089 function install()
2090 {
2091 // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
2092 if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
2093
2094
2095 // This part makes sure sessions works correctly.
2096 // (Because on some hosts, session.save_path may not be set correctly,
2097 // or we may not have write access to it.)
2098 if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
2099 { // Step 2: Check if data in session is correct.
2100 echo '<pre>Sessions do not seem to work correctly on your server.<br>';
2101 echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
2102 echo 'It currently points to '.session_save_path().'<br>';
2103 echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
2104 echo '<br><a href="?">Click to try again.</a></pre>';
2105 die;
2106 }
2107 if (!isset($_SESSION['session_tested']))
2108 { // Step 1 : Try to store data in session and reload page.
2109 $_SESSION['session_tested'] = 'Working'; // Try to set a variable in session.
2110 header('Location: '.index_url($_SERVER).'?test_session'); // Redirect to check stored data.
2111 }
2112 if (isset($_GET['test_session']))
2113 { // Step 3: Sessions are OK. Remove test parameter from URL.
2114 header('Location: '.index_url($_SERVER));
2115 }
2116
2117
2118 if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2119 {
2120 $tz = 'UTC';
2121 if (!empty($_POST['continent']) && !empty($_POST['city'])
2122 && isTimeZoneValid($_POST['continent'], $_POST['city'])
2123 ) {
2124 $tz = $_POST['continent'].'/'.$_POST['city'];
2125 }
2126 $GLOBALS['timezone'] = $tz;
2127 // Everything is ok, let's create config file.
2128 $GLOBALS['login'] = $_POST['setlogin'];
2129 $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
2130 $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
2131 $GLOBALS['title'] = (empty($_POST['title']) ? 'Shared links on '.escape(index_url($_SERVER)) : $_POST['title'] );
2132 $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
2133 try {
2134 writeConfig($GLOBALS, isLoggedIn());
2135 }
2136 catch(Exception $e) {
2137 error_log(
2138 'ERROR while writing config file after installation.' . PHP_EOL .
2139 $e->getMessage()
2140 );
2141
2142 // TODO: do not handle exceptions/errors in JS.
2143 echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
2144 exit;
2145 }
2146 echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2147 exit;
2148 }
2149
2150 // Display config form:
2151 list($timezone_form, $timezone_js) = generateTimeZoneForm();
2152 $timezone_html = '';
2153 if ($timezone_form != '') {
2154 $timezone_html = '<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
2155 }
2156
2157 $PAGE = new pageBuilder;
2158 $PAGE->assign('timezone_html',$timezone_html);
2159 $PAGE->assign('timezone_js',$timezone_js);
2160 $PAGE->renderPage('install');
2161 exit;
2162 }
2163
2164 /* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2165 I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2166 The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2167 This function is called by passing the URL:
2168 http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2169 [URL] is the URL of the link (e.g. a flickr page)
2170 [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2171 The function below will fetch the image from the webservice and store it in the cache.
2172 */
2173 function genThumbnail()
2174 {
2175 // Make sure the parameters in the URL were generated by us.
2176 $sign = hash_hmac('sha256', $_GET['url'], $GLOBALS['salt']);
2177 if ($sign!=$_GET['hmac']) die('Naughty boy!');
2178
2179 // Let's see if we don't already have the image for this URL in the cache.
2180 $thumbname=hash('sha1',$_GET['url']).'.jpg';
2181 if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$thumbname))
2182 { // We have the thumbnail, just serve it:
2183 header('Content-Type: image/jpeg');
2184 echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname);
2185 return;
2186 }
2187 // We may also serve a blank image (if service did not respond)
2188 $blankname=hash('sha1',$_GET['url']).'.gif';
2189 if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$blankname))
2190 {
2191 header('Content-Type: image/gif');
2192 echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname);
2193 return;
2194 }
2195
2196 // Otherwise, generate the thumbnail.
2197 $url = $_GET['url'];
2198 $domain = parse_url($url,PHP_URL_HOST);
2199
2200 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2201 {
2202 // Crude replacement to handle new flickr domain policy (They prefer www. now)
2203 $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2204
2205 // Is this a link to an image, or to a flickr page ?
2206 $imageurl='';
2207 if (endswith(parse_url($url,PHP_URL_PATH),'.jpg'))
2208 { // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2209 preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2210 if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2211 }
2212 else // This is a flickr page (html)
2213 {
2214 // Get the flickr html page.
2215 list($headers, $content) = get_http_response($url, 20);
2216 if (strpos($headers[0], '200 OK') !== false)
2217 {
2218 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2219 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
2220 if (!empty($matches[1])) $imageurl=$matches[1];
2221
2222 // In albums (and some other pages), the link rel="image_src" is not provided,
2223 // but flickr provides:
2224 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2225 if ($imageurl=='')
2226 {
2227 preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!', $content, $matches);
2228 if (!empty($matches[1])) $imageurl=$matches[1];
2229 }
2230 }
2231 }
2232
2233 if ($imageurl!='')
2234 { // Let's download the image.
2235 // Image is 240x120, so 10 seconds to download should be enough.
2236 list($headers, $content) = get_http_response($imageurl, 10);
2237 if (strpos($headers[0], '200 OK') !== false) {
2238 // Save image to cache.
2239 file_put_contents($GLOBALS['config']['CACHEDIR'].'/' . $thumbname, $content);
2240 header('Content-Type: image/jpeg');
2241 echo $content;
2242 return;
2243 }
2244 }
2245 }
2246
2247 elseif ($domain=='vimeo.com' )
2248 {
2249 // This is more complex: we have to perform a HTTP request, then parse the result.
2250 // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2251 $vid = substr(parse_url($url,PHP_URL_PATH),1);
2252 list($headers, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
2253 if (strpos($headers[0], '200 OK') !== false) {
2254 $t = unserialize($content);
2255 $imageurl = $t[0]['thumbnail_medium'];
2256 // Then we download the image and serve it to our client.
2257 list($headers, $content) = get_http_response($imageurl, 10);
2258 if (strpos($headers[0], '200 OK') !== false) {
2259 // Save image to cache.
2260 file_put_contents($GLOBALS['config']['CACHEDIR'] . '/' . $thumbname, $content);
2261 header('Content-Type: image/jpeg');
2262 echo $content;
2263 return;
2264 }
2265 }
2266 }
2267
2268 elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2269 {
2270 // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2271 // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2272 // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2273 list($headers, $content) = get_http_response($url, 5);
2274 if (strpos($headers[0], '200 OK') !== false) {
2275 // Extract the link to the thumbnail
2276 preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!', $content, $matches);
2277 if (!empty($matches[1]))
2278 { // Let's download the image.
2279 $imageurl=$matches[1];
2280 // No control on image size, so wait long enough
2281 list($headers, $content) = get_http_response($imageurl, 20);
2282 if (strpos($headers[0], '200 OK') !== false) {
2283 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2284 file_put_contents($filepath, $content); // Save image to cache.
2285 if (resizeImage($filepath))
2286 {
2287 header('Content-Type: image/jpeg');
2288 echo file_get_contents($filepath);
2289 return;
2290 }
2291 }
2292 }
2293 }
2294 }
2295
2296 elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2297 {
2298 // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2299 // http://xkcd.com/327/
2300 // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2301 list($headers, $content) = get_http_response($url, 5);
2302 if (strpos($headers[0], '200 OK') !== false) {
2303 // Extract the link to the thumbnail
2304 preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!', $content, $matches);
2305 if (!empty($matches[1]))
2306 { // Let's download the image.
2307 $imageurl=$matches[1];
2308 // No control on image size, so wait long enough
2309 list($headers, $content) = get_http_response($imageurl, 20);
2310 if (strpos($headers[0], '200 OK') !== false) {
2311 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2312 // Save image to cache.
2313 file_put_contents($filepath, $content);
2314 if (resizeImage($filepath))
2315 {
2316 header('Content-Type: image/jpeg');
2317 echo file_get_contents($filepath);
2318 return;
2319 }
2320 }
2321 }
2322 }
2323 }
2324
2325 else
2326 {
2327 // For all other domains, we try to download the image and make a thumbnail.
2328 // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2329 list($headers, $content) = get_http_response($url, 30);
2330 if (strpos($headers[0], '200 OK') !== false) {
2331 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2332 // Save image to cache.
2333 file_put_contents($filepath, $content);
2334 if (resizeImage($filepath))
2335 {
2336 header('Content-Type: image/jpeg');
2337 echo file_get_contents($filepath);
2338 return;
2339 }
2340 }
2341 }
2342
2343
2344 // Otherwise, return an empty image (8x8 transparent gif)
2345 $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2346 file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname,$blankgif); // Also put something in cache so that this URL is not requested twice.
2347 header('Content-Type: image/gif');
2348 echo $blankgif;
2349 }
2350
2351 // Make a thumbnail of the image (to width: 120 pixels)
2352 // Returns true if success, false otherwise.
2353 function resizeImage($filepath)
2354 {
2355 if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2356
2357 // Trick: some stupid people rename GIF as JPEG... or else.
2358 // So we really try to open each image type whatever the extension is.
2359 $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2360 $im=false;
2361 $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2362 $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2363 $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2364 if (!$im) return false; // Unable to open image (corrupted or not an image)
2365 $w = imagesx($im);
2366 $h = imagesy($im);
2367 $ystart = 0; $yheight=$h;
2368 if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2369 $nw = 120; // Desired width
2370 $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2371 // Resize image:
2372 $im2 = imagecreatetruecolor($nw,$nh);
2373 imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2374 imageinterlace($im2,true); // For progressive JPEG.
2375 $tempname=$filepath.'_TEMP.jpg';
2376 imagejpeg($im2, $tempname, 90);
2377 imagedestroy($im);
2378 imagedestroy($im2);
2379 unlink($filepath);
2380 rename($tempname,$filepath); // Overwrite original picture with thumbnail.
2381 return true;
2382 }
2383
2384 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=genthumbnail')) { genThumbnail(); exit; } // Thumbnail generation/cache does not need the link database.
2385 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=dailyrss')) { showDailyRSS(); exit; }
2386 if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=$GLOBALS['config']['LINKS_PER_PAGE'];
2387 renderPage();
2388 ?>