]> git.immae.eu Git - github/shaarli/Shaarli.git/blob - index.php
shaarli/Shaarli#34: Make update check optional
[github/shaarli/Shaarli.git] / index.php
1 <?php
2 // Shaarli 0.0.43beta - Shaare your links...
3 // The personal, minimalist, super-fast, no-database Delicious clone. By sebsauvage.net
4 // http://sebsauvage.net/wiki/doku.php?id=php:shaarli
5 // Licence: http://www.opensource.org/licenses/zlib-license.php
6 // Requires: PHP 5.1.x (but autocomplete fields will only work if you have PHP 5.2.x)
7 // -----------------------------------------------------------------------------------------------
8 // NEVER TRUST IN PHP.INI
9 // Some hosts do not define a default timezone in php.ini,
10 // so we have to do this for avoid the strict standard error.
11 date_default_timezone_set('UTC');
12
13 // -----------------------------------------------------------------------------------------------
14 // Hardcoded parameter (These parameters can be overwritten by creating the file /data/options.php)
15 $GLOBALS['config']['DATADIR'] = 'data'; // Data subdirectory
16 $GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php'; // Configuration file (user login/password)
17 $GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php'; // Data storage file.
18 $GLOBALS['config']['LINKS_PER_PAGE'] = 20; // Default links per page.
19 $GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php'; // File storage for failures and bans.
20 $GLOBALS['config']['BAN_AFTER'] = 4; // Ban IP after this many failures.
21 $GLOBALS['config']['BAN_DURATION'] = 1800; // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes)
22 $GLOBALS['config']['OPEN_SHAARLI'] = false; // If true, anyone can add/edit/delete links without having to login
23 $GLOBALS['config']['HIDE_TIMESTAMPS'] = false; // If true, the moment when links were saved are not shown to users that are not logged in.
24 $GLOBALS['config']['SHOW_ATOM'] = false; // If true, an extra "ATOM feed" button will be displayed in the toolbar
25 $GLOBALS['config']['ENABLE_THUMBNAILS'] = true; // Enable thumbnails in links.
26 $GLOBALS['config']['CACHEDIR'] = 'cache'; // Cache directory for thumbnails for SLOW services (like flickr)
27 $GLOBALS['config']['PAGECACHE'] = 'pagecache'; // Page cache directory.
28 $GLOBALS['config']['ENABLE_LOCALCACHE'] = true; // Enable Shaarli to store thumbnail in a local cache. Disable to reduce web space usage.
29 $GLOBALS['config']['PUBSUBHUB_URL'] = ''; // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
30 $GLOBALS['config']['RAINTPL_TMP'] = 'tmp/' ; // Raintpl cache directory (keep the trailing slash!)
31 $GLOBALS['config']['RAINTPL_TPL'] = 'tpl/' ; // Raintpl template directory (keep the trailing slash!)
32 $GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt'; // For updates check of Shaarli.
33 $GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ; // Updates check frequency for Shaarli. 86400 seconds=24 hours
34 // Note: You must have publisher.php in the same directory as Shaarli index.php
35 $GLOBALS['config']['ARCHIVE_ORG'] = false; // For each link, add a link to an archived version on archive.org
36 $GLOBALS['config']['ENABLE_RSS_PERMALINKS'] = true; // Enable RSS permalinks by default. This corresponds to the default behavior of shaarli before this was added as an option.
37 // -----------------------------------------------------------------------------------------------
38 // You should not touch below (or at your own risks!)
39 // Optional config file.
40 if (is_file($GLOBALS['config']['DATADIR'].'/options.php')) require($GLOBALS['config']['DATADIR'].'/options.php');
41
42 define('shaarli_version','0.0.43beta');
43 define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in PHP code.
44 define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in PHP code.
45 // http://server.com/x/shaarli --> /shaarli/
46 define('WEB_PATH', substr($_SERVER["REQUEST_URI"], 0, 1+strrpos($_SERVER["REQUEST_URI"], '/', 0)));
47
48 // Force cookie path (but do not change lifetime)
49 $cookie=session_get_cookie_params();
50 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
51 session_set_cookie_params($cookie['lifetime'],$cookiedir,$_SERVER['SERVER_NAME']); // Set default cookie expiration and path.
52
53 // Set session parameters on server side.
54 define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
55 ini_set('session.use_cookies', 1); // Use cookies to store session.
56 ini_set('session.use_only_cookies', 1); // Force cookies for session (phpsessionID forbidden in URL).
57 ini_set('session.use_trans_sid', false); // Prevent PHP form using sessionID in URL if cookies are disabled.
58 session_name('shaarli');
59 if (session_id() == '') session_start(); // Start session if needed (Some server auto-start sessions).
60
61 // PHP Settings
62 ini_set('max_input_time','60'); // High execution time in case of problematic imports/exports.
63 ini_set('memory_limit', '128M'); // Try to set max upload file size and read (May not work on some hosts).
64 ini_set('post_max_size', '16M');
65 ini_set('upload_max_filesize', '16M');
66 checkphpversion();
67 error_reporting(E_ALL^E_WARNING); // See all error except warnings.
68 //error_reporting(-1); // See all errors (for debugging only)
69
70 include "inc/rain.tpl.class.php"; //include Rain TPL
71 raintpl::$tpl_dir = $GLOBALS['config']['RAINTPL_TPL']; // template directory
72 raintpl::$cache_dir = $GLOBALS['config']['RAINTPL_TMP']; // cache directory
73
74 ob_start(); // Output buffering for the page cache.
75
76
77 // In case stupid admin has left magic_quotes enabled in php.ini:
78 if (get_magic_quotes_gpc())
79 {
80 function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
81 $_POST = array_map('stripslashes_deep', $_POST);
82 $_GET = array_map('stripslashes_deep', $_GET);
83 $_COOKIE = array_map('stripslashes_deep', $_COOKIE);
84 }
85
86 // Prevent caching on client side or proxy: (yes, it's ugly)
87 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
88 header("Cache-Control: no-store, no-cache, must-revalidate");
89 header("Cache-Control: post-check=0, pre-check=0", false);
90 header("Pragma: no-cache");
91
92 // Directories creations (Note that your web host may require different rights than 705.)
93 if (!is_writable(realpath(dirname(__FILE__)))) die('<pre>ERROR: Shaarli does not have the right to write in its own directory.</pre>');
94
95 // Handling of old config file which do not have the new parameters.
96 if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.htmlspecialchars(indexUrl());
97 if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get();
98 if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']='';
99 if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false;
100 if (empty($GLOBALS['disablejquery'])) $GLOBALS['disablejquery']=false;
101 if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false;
102 if (empty($GLOBALS['titleLink'])) $GLOBALS['titleLink']='?';
103 // I really need to rewrite Shaarli with a proper configuation manager.
104
105 // Run config screen if first run:
106 if (!is_file($GLOBALS['config']['CONFIG_FILE'])) install();
107
108 require $GLOBALS['config']['CONFIG_FILE']; // Read login/password hash into $GLOBALS.
109
110 // a token depending of deployment salt, user password, and the current ip
111 define('STAY_SIGNED_IN_TOKEN', sha1($GLOBALS['hash'].$_SERVER["REMOTE_ADDR"].$GLOBALS['salt']));
112
113 autoLocale(); // Sniff browser language and set date format accordingly.
114 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
115
116 //==================================================================================================
117 // Checking session state (i.e. is the user still logged in)
118 //==================================================================================================
119
120 function setup_login_state() {
121 $userIsLoggedIn = false; // By default, we do not consider the user as logged in;
122 $loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
123 if ($GLOBALS['config']['OPEN_SHAARLI']) {
124 $userIsLoggedIn = true;
125 }
126 if (!isset($GLOBALS['login'])) {
127 $userIsLoggedIn = false; // Shaarli is not configured yet.
128 $loginFailure = true;
129 }
130 if (isset($_COOKIE['shaarli_staySignedIn']) &&
131 $_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
132 !$loginFailure)
133 {
134 fillSessionInfo();
135 $userIsLoggedIn = true;
136 }
137 // If session does not exist on server side, or IP address has changed, or session has expired, logout.
138 if (empty($_SESSION['uid']) ||
139 ($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) ||
140 time() >= $_SESSION['expires_on'])
141 {
142 logout();
143 $userIsLoggedIn = false;
144 $loginFailure = true;
145 }
146 if (!empty($_SESSION['longlastingsession'])) {
147 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
148 }
149 else {
150 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
151 }
152 if (!$loginFailure) {
153 $userIsLoggedIn = true;
154 }
155
156 return $userIsLoggedIn;
157 }
158 //==================================================================================================
159 $userIsLoggedIn = setup_login_state();
160 //==================================================================================================
161 //==================================================================================================
162
163 // Check PHP version
164 function checkphpversion()
165 {
166 if (version_compare(PHP_VERSION, '5.1.0') < 0)
167 {
168 header('Content-Type: text/plain; charset=utf-8');
169 echo 'Your PHP version is obsolete! Shaarli requires at least php 5.1.0, and thus cannot run. Sorry. Your PHP version has known security vulnerabilities and should be updated as soon as possible.';
170 exit;
171 }
172 }
173
174 // Checks if an update is available for Shaarli.
175 // (at most once a day, and only for registered user.)
176 // Output: '' = no new version.
177 // other= the available version.
178 function checkUpdate()
179 {
180 if (!isLoggedIn()) return ''; // Do not check versions for visitors.
181 if (empty($GLOBALS['config']['ENABLE_UPDATECHECK'])) return ''; // Do not check if the user doesn't want to.
182
183 // Get latest version number at most once a day.
184 if (!is_file($GLOBALS['config']['UPDATECHECK_FILENAME']) || (filemtime($GLOBALS['config']['UPDATECHECK_FILENAME'])<time()-($GLOBALS['config']['UPDATECHECK_INTERVAL'])))
185 {
186 $version=shaarli_version;
187 list($httpstatus,$headers,$data) = getHTTP('https://raw.githubusercontent.com/shaarli/Shaarli/master/shaarli_version.txt',2);
188 if (strpos($httpstatus,'200 OK')!==false) $version=$data;
189 // If failed, never mind. We don't want to bother the user with that.
190 file_put_contents($GLOBALS['config']['UPDATECHECK_FILENAME'],$version); // touch file date
191 }
192 // Compare versions:
193 $newestversion=file_get_contents($GLOBALS['config']['UPDATECHECK_FILENAME']);
194 if (version_compare($newestversion,shaarli_version)==1) return $newestversion;
195 return '';
196 }
197
198
199 // -----------------------------------------------------------------------------------------------
200 // Simple cache system (mainly for the RSS/ATOM feeds).
201
202 class pageCache
203 {
204 private $url; // Full URL of the page to cache (typically the value returned by pageUrl())
205 private $shouldBeCached; // boolean: Should this url be cached?
206 private $filename; // Name of the cache file for this url.
207
208 /*
209 $url = URL (typically the value returned by pageUrl())
210 $shouldBeCached = boolean. If false, the cache will be disabled.
211 */
212 public function __construct($url,$shouldBeCached)
213 {
214 $this->url = $url;
215 $this->filename = $GLOBALS['config']['PAGECACHE'].'/'.sha1($url).'.cache';
216 $this->shouldBeCached = $shouldBeCached;
217 }
218
219 // If the page should be cached and a cached version exists,
220 // returns the cached version (otherwise, return null).
221 public function cachedVersion()
222 {
223 if (!$this->shouldBeCached) return null;
224 if (is_file($this->filename)) { return file_get_contents($this->filename); exit; }
225 return null;
226 }
227
228 // Put a page in the cache.
229 public function cache($page)
230 {
231 if (!$this->shouldBeCached) return;
232 file_put_contents($this->filename,$page);
233 }
234
235 // Purge the whole cache.
236 // (call with pageCache::purgeCache())
237 public static function purgeCache()
238 {
239 if (is_dir($GLOBALS['config']['PAGECACHE']))
240 {
241 $handler = opendir($GLOBALS['config']['PAGECACHE']);
242 if ($handler!==false)
243 {
244 while (($filename = readdir($handler))!==false)
245 {
246 if (endsWith($filename,'.cache')) { unlink($GLOBALS['config']['PAGECACHE'].'/'.$filename); }
247 }
248 closedir($handler);
249 }
250 }
251 }
252
253 }
254
255
256 // -----------------------------------------------------------------------------------------------
257 // Log to text file
258 function logm($message)
259 {
260 $t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
261 file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND);
262 }
263
264 // Same as nl2br(), but escapes < and >
265 function nl2br_escaped($html)
266 {
267 return str_replace('>','&gt;',str_replace('<','&lt;',nl2br($html)));
268 }
269
270 /* Returns the small hash of a string, using RFC 4648 base64url format
271 e.g. smallHash('20111006_131924') --> yZH23w
272 Small hashes:
273 - are unique (well, as unique as crc32, at last)
274 - are always 6 characters long.
275 - only use the following characters: a-z A-Z 0-9 - _ @
276 - are NOT cryptographically secure (they CAN be forged)
277 In Shaarli, they are used as a tinyurl-like link to individual entries.
278 */
279 function smallHash($text)
280 {
281 $t = rtrim(base64_encode(hash('crc32',$text,true)),'=');
282 return strtr($t, '+/', '-_');
283 }
284
285 // In a string, converts URLs to clickable links.
286 // Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722
287 function text2clickable($url)
288 {
289 $redir = empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'];
290 return preg_replace('!(((?:https?|ftp|file)://|apt:|magnet:)\S+[[:alnum:]]/?)!si','<a href="'.$redir.'$1" rel="nofollow">$1</a>',$url);
291 }
292
293 // This function inserts &nbsp; where relevant so that multiple spaces are properly displayed in HTML
294 // even in the absence of <pre> (This is used in description to keep text formatting)
295 function keepMultipleSpaces($text)
296 {
297 return str_replace(' ',' &nbsp;',$text);
298
299 }
300 // ------------------------------------------------------------------------------------------
301 // Sniff browser language to display dates in the right format automatically.
302 // (Note that is may not work on your server if the corresponding local is not installed.)
303 function autoLocale()
304 {
305 $loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
306 if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // e.g. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
307 { // (It's a bit crude, but it works very well. Preferred language is always presented first.)
308 if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
309 }
310 setlocale(LC_TIME,$loc); // LC_TIME = Set local for date/time format only.
311 }
312
313 // ------------------------------------------------------------------------------------------
314 // PubSubHubbub protocol support (if enabled) [UNTESTED]
315 // (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
316 if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php';
317 function pubsubhub()
318 {
319 if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
320 {
321 $p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']);
322 $topic_url = array (
323 indexUrl().'?do=atom',
324 indexUrl().'?do=rss'
325 );
326 $p->publish_update($topic_url);
327 }
328 }
329
330 // ------------------------------------------------------------------------------------------
331 // Session management
332
333 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
334 function allIPs()
335 {
336 $ip = $_SERVER["REMOTE_ADDR"];
337 // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
338 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
339 if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
340 return $ip;
341 }
342
343 function fillSessionInfo() {
344 $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // Generate unique random number (different than phpsessionid)
345 $_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked.
346 $_SESSION['username']=$GLOBALS['login'];
347 $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
348 }
349
350 // Check that user/password is correct.
351 function check_auth($login,$password)
352 {
353 $hash = sha1($password.$login.$GLOBALS['salt']);
354 if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
355 { // Login/password is correct.
356 fillSessionInfo();
357 logm('Login successful');
358 return True;
359 }
360 logm('Login failed for user '.$login);
361 return False;
362 }
363
364 // Returns true if the user is logged in.
365 function isLoggedIn()
366 {
367 global $userIsLoggedIn;
368 return $userIsLoggedIn;
369 }
370
371 // Force logout.
372 function logout() {
373 if (isset($_SESSION)) {
374 unset($_SESSION['uid']);
375 unset($_SESSION['ip']);
376 unset($_SESSION['username']);
377 unset($_SESSION['privateonly']);
378 }
379 setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
380 }
381
382
383 // ------------------------------------------------------------------------------------------
384 // Brute force protection system
385 // Several consecutive failed logins will ban the IP address for 30 minutes.
386 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?>");
387 include $GLOBALS['config']['IPBANS_FILENAME'];
388 // Signal a failed login. Will ban the IP if too many failures:
389 function ban_loginFailed()
390 {
391 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
392 if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
393 $gb['FAILURES'][$ip]++;
394 if ($gb['FAILURES'][$ip]>($GLOBALS['config']['BAN_AFTER']-1))
395 {
396 $gb['BANS'][$ip]=time()+$GLOBALS['config']['BAN_DURATION'];
397 logm('IP address banned from login');
398 }
399 $GLOBALS['IPBANS'] = $gb;
400 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
401 }
402
403 // Signals a successful login. Resets failed login counter.
404 function ban_loginOk()
405 {
406 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
407 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
408 $GLOBALS['IPBANS'] = $gb;
409 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
410 }
411
412 // Checks if the user CAN login. If 'true', the user can try to login.
413 function ban_canLogin()
414 {
415 $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
416 if (isset($gb['BANS'][$ip]))
417 {
418 // User is banned. Check if the ban has expired:
419 if ($gb['BANS'][$ip]<=time())
420 { // Ban expired, user can try to login again.
421 logm('Ban lifted.');
422 unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
423 file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
424 return true; // Ban has expired, user can login.
425 }
426 return false; // User is banned.
427 }
428 return true; // User is not banned.
429 }
430
431 // ------------------------------------------------------------------------------------------
432 // Process login form: Check if login/password is correct.
433 if (isset($_POST['login']))
434 {
435 if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
436 if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
437 { // Login/password is OK.
438 ban_loginOk();
439 // If user wants to keep the session cookie even after the browser closes:
440 if (!empty($_POST['longlastingsession']))
441 {
442 setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
443 $_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
444 $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
445
446 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
447 session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['SERVER_NAME']); // Set session cookie expiration on client side
448 // Note: Never forget the trailing slash on the cookie path!
449 session_regenerate_id(true); // Send cookie with new expiration date to browser.
450 }
451 else // Standard session expiration (=when browser closes)
452 {
453 $cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
454 session_set_cookie_params(0,$cookiedir,$_SERVER['SERVER_NAME']); // 0 means "When browser closes"
455 session_regenerate_id(true);
456 }
457 // Optional redirect after login:
458 if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
459 if (isset($_POST['returnurl']))
460 {
461 if (endsWith($_POST['returnurl'],'?do=login')) { header('Location: ?'); exit; } // Prevent loops over login screen.
462 header('Location: '.$_POST['returnurl']); exit;
463 }
464 header('Location: ?'); exit;
465 }
466 else
467 {
468 ban_loginFailed();
469 $redir = '';
470 if (isset($_GET['post'])) { $redir = '&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):''); }
471 echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
472 exit;
473 }
474 }
475
476 // ------------------------------------------------------------------------------------------
477 // Misc utility functions:
478
479 // Returns the server URL (including port and http/https), without path.
480 // e.g. "http://myserver.com:8080"
481 // You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
482 function serverUrl()
483 {
484 $https = (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS'])=='on')) || $_SERVER["SERVER_PORT"]=='443'; // HTTPS detection.
485 $serverport = ($_SERVER["SERVER_PORT"]=='80' || ($https && $_SERVER["SERVER_PORT"]=='443') ? '' : ':'.$_SERVER["SERVER_PORT"]);
486 return 'http'.($https?'s':'').'://'.$_SERVER['SERVER_NAME'].$serverport;
487 }
488
489 // Returns the absolute URL of current script, without the query.
490 // (e.g. http://sebsauvage.net/links/)
491 function indexUrl()
492 {
493 $scriptname = $_SERVER["SCRIPT_NAME"];
494 // If the script is named 'index.php', we remove it (for better looking URLs,
495 // e.g. http://mysite.com/shaarli/?abcde instead of http://mysite.com/shaarli/index.php?abcde)
496 if (endswith($scriptname,'index.php')) $scriptname = substr($scriptname,0,strlen($scriptname)-9);
497 return serverUrl() . $scriptname;
498 }
499
500 // Returns the absolute URL of current script, WITH the query.
501 // (e.g. http://sebsauvage.net/links/?toto=titi&spamspamspam=humbug)
502 function pageUrl()
503 {
504 return indexUrl().(!empty($_SERVER["QUERY_STRING"]) ? '?'.$_SERVER["QUERY_STRING"] : '');
505 }
506
507 // Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes.
508 function return_bytes($val)
509 {
510 $val = trim($val); $last=strtolower($val[strlen($val)-1]);
511 switch($last)
512 {
513 case 'g': $val *= 1024;
514 case 'm': $val *= 1024;
515 case 'k': $val *= 1024;
516 }
517 return $val;
518 }
519
520 // Try to determine max file size for uploads (POST).
521 // Returns an integer (in bytes)
522 function getMaxFileSize()
523 {
524 $size1 = return_bytes(ini_get('post_max_size'));
525 $size2 = return_bytes(ini_get('upload_max_filesize'));
526 // Return the smaller of two:
527 $maxsize = min($size1,$size2);
528 // FIXME: Then convert back to readable notations ? (e.g. 2M instead of 2000000)
529 return $maxsize;
530 }
531
532 // Tells if a string start with a substring or not.
533 function startsWith($haystack,$needle,$case=true)
534 {
535 if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
536 return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
537 }
538
539 // Tells if a string ends with a substring or not.
540 function endsWith($haystack,$needle,$case=true)
541 {
542 if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
543 return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
544 }
545
546 /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
547 (used to build the ADD_DATE attribute in Netscape-bookmarks file)
548 PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
549 function linkdate2timestamp($linkdate)
550 {
551 $Y=$M=$D=$h=$m=$s=0;
552 $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
553 return mktime($h,$m,$s,$M,$D,$Y);
554 }
555
556 /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
557 (used to build the pubDate attribute in RSS feed.) */
558 function linkdate2rfc822($linkdate)
559 {
560 return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
561 }
562
563 /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a ISO 8601 date.
564 (used to build the updated tags in ATOM feed.) */
565 function linkdate2iso8601($linkdate)
566 {
567 return date('c',linkdate2timestamp($linkdate)); // 'c' is for ISO 8601 date format.
568 }
569
570 /* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
571 (used to display link date on screen)
572 The date format is automatically chosen according to locale/languages sniffed from browser headers (see autoLocale()). */
573 function linkdate2locale($linkdate)
574 {
575 return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
576 // Note that if you use a locale which is not installed on your webserver,
577 // the date will not be displayed in the chosen locale, but probably in US notation.
578 }
579
580 // Parse HTTP response headers and return an associative array.
581 function http_parse_headers_shaarli( $headers )
582 {
583 $res=array();
584 foreach($headers as $header)
585 {
586 $i = strpos($header,': ');
587 if ($i!==false)
588 {
589 $key=substr($header,0,$i);
590 $value=substr($header,$i+2,strlen($header)-$i-2);
591 $res[$key]=$value;
592 }
593 }
594 return $res;
595 }
596
597 /* GET an URL.
598 Input: $url : URL to get (http://...)
599 $timeout : Network timeout (will wait this many seconds for an anwser before giving up).
600 Output: An array. [0] = HTTP status message (e.g. "HTTP/1.1 200 OK") or error message
601 [1] = associative array containing HTTP response headers (e.g. echo getHTTP($url)[1]['Content-Type'])
602 [2] = data
603 Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
604 if (strpos($httpstatus,'200 OK')!==false)
605 echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
606 else
607 echo 'There was an error: '.htmlspecialchars($httpstatus)
608 */
609 function getHTTP($url,$timeout=30)
610 {
611 try
612 {
613 $options = array('http'=>array('method'=>'GET','timeout' => $timeout, 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0')); // Force network timeout
614 $context = stream_context_create($options);
615 $data=file_get_contents($url,false,$context,-1, 4000000); // We download at most 4 Mb from source.
616 if (!$data) { return array('HTTP Error',array(),''); }
617 $httpStatus=$http_response_header[0]; // e.g. "HTTP/1.1 200 OK"
618 $responseHeaders=http_parse_headers_shaarli($http_response_header);
619 return array($httpStatus,$responseHeaders,$data);
620 }
621 catch (Exception $e) // getHTTP *can* fail silently (we don't care if the title cannot be fetched)
622 {
623 return array($e->getMessage(),'','');
624 }
625 }
626
627 // Extract title from an HTML document.
628 // (Returns an empty string if not found.)
629 function html_extract_title($html)
630 {
631 return preg_match('!<title>(.*?)</title>!is', $html, $matches) ? trim(str_replace("\n",' ', $matches[1])) : '' ;
632 }
633
634 // ------------------------------------------------------------------------------------------
635 // Token management for XSRF protection
636 // Token should be used in any form which acts on data (create,update,delete,import...).
637 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
638
639 // Returns a token.
640 function getToken()
641 {
642 $rnd = sha1(uniqid('',true).'_'.mt_rand().$GLOBALS['salt']); // We generate a random string.
643 $_SESSION['tokens'][$rnd]=1; // Store it on the server side.
644 return $rnd;
645 }
646
647 // Tells if a token is OK. Using this function will destroy the token.
648 // true=token is OK.
649 function tokenOk($token)
650 {
651 if (isset($_SESSION['tokens'][$token]))
652 {
653 unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
654 return true; // Token is OK.
655 }
656 return false; // Wrong token, or already used.
657 }
658
659 // ------------------------------------------------------------------------------------------
660 /* This class is in charge of building the final page.
661 (This is basically a wrapper around RainTPL which pre-fills some fields.)
662 p = new pageBuilder;
663 p.assign('myfield','myvalue');
664 p.renderPage('mytemplate');
665
666 */
667 class pageBuilder
668 {
669 private $tpl; // RainTPL template
670
671 function __construct()
672 {
673 $this->tpl=false;
674 }
675
676 private function initialize()
677 {
678 $this->tpl = new RainTPL;
679 $this->tpl->assign('newversion',checkUpdate());
680 $this->tpl->assign('feedurl',htmlspecialchars(indexUrl()));
681 $searchcrits=''; // Search criteria
682 if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']);
683 elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']);
684 $this->tpl->assign('searchcrits',$searchcrits);
685 $this->tpl->assign('source',indexUrl());
686 $this->tpl->assign('version',shaarli_version);
687 $this->tpl->assign('scripturl',indexUrl());
688 $this->tpl->assign('pagetitle','Shaarli');
689 $this->tpl->assign('privateonly',!empty($_SESSION['privateonly'])); // Show only private links?
690 if (!empty($GLOBALS['title'])) $this->tpl->assign('pagetitle',$GLOBALS['title']);
691 if (!empty($GLOBALS['titleLink'])) $this->tpl->assign('titleLink',$GLOBALS['titleLink']);
692 if (!empty($GLOBALS['pagetitle'])) $this->tpl->assign('pagetitle',$GLOBALS['pagetitle']);
693 $this->tpl->assign('shaarlititle',empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title'] );
694 return;
695 }
696
697 // The following assign() method is basically the same as RainTPL (except that it's lazy)
698 public function assign($what,$where)
699 {
700 if ($this->tpl===false) $this->initialize(); // Lazy initialization
701 $this->tpl->assign($what,$where);
702 }
703
704 // Render a specific page (using a template).
705 // e.g. pb.renderPage('picwall')
706 public function renderPage($page)
707 {
708 if ($this->tpl===false) $this->initialize(); // Lazy initialization
709 $this->tpl->draw($page);
710 }
711 }
712
713 // ------------------------------------------------------------------------------------------
714 /* Data storage for links.
715 This object behaves like an associative array.
716 Example:
717 $mylinks = new linkdb();
718 echo $mylinks['20110826_161819']['title'];
719 foreach($mylinks as $link)
720 echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
721
722 Available keys:
723 title : Title of the link
724 url : URL of the link. Can be absolute or relative. Relative URLs are permalinks (e.g.'?m-ukcw')
725 description : description of the entry
726 private : Is this link private? 0=no, other value=yes
727 linkdate : date of the creation of this entry, in the form YYYYMMDD_HHMMSS (e.g.'20110914_192317')
728 tags : tags attached to this entry (separated by spaces)
729
730 We implement 3 interfaces:
731 - ArrayAccess so that this object behaves like an associative array.
732 - Iterator so that this object can be used in foreach() loops.
733 - Countable interface so that we can do a count() on this object.
734 */
735 class linkdb implements Iterator, Countable, ArrayAccess
736 {
737 private $links; // List of links (associative array. Key=linkdate (e.g. "20110823_124546"), value= associative array (keys:title,description...)
738 private $urls; // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
739 private $keys; // List of linkdate keys (for the Iterator interface implementation)
740 private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
741 private $loggedin; // Is the user logged in? (used to filter private links)
742
743 // Constructor:
744 function __construct($isLoggedIn)
745 // Input : $isLoggedIn : is the user logged in?
746 {
747 $this->loggedin = $isLoggedIn;
748 $this->checkdb(); // Make sure data file exists.
749 $this->readdb(); // Then read it.
750 }
751
752 // ---- Countable interface implementation
753 public function count() { return count($this->links); }
754
755 // ---- ArrayAccess interface implementation
756 public function offsetSet($offset, $value)
757 {
758 if (!$this->loggedin) die('You are not authorized to add a link.');
759 if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and URL.');
760 if (empty($offset)) die('You must specify a key.');
761 $this->links[$offset] = $value;
762 $this->urls[$value['url']]=$offset;
763 }
764 public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
765 public function offsetUnset($offset)
766 {
767 if (!$this->loggedin) die('You are not authorized to delete a link.');
768 $url = $this->links[$offset]['url']; unset($this->urls[$url]);
769 unset($this->links[$offset]);
770 }
771 public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
772
773 // ---- Iterator interface implementation
774 function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
775 function key() { return $this->keys[$this->position]; } // current key
776 function current() { return $this->links[$this->keys[$this->position]]; } // current value
777 function next() { ++$this->position; } // go to next item
778 function valid() { return isset($this->keys[$this->position]); } // Check if current position is valid.
779
780 // ---- Misc methods
781 private function checkdb() // Check if db directory and file exists.
782 {
783 if (!file_exists($GLOBALS['config']['DATASTORE'])) // Create a dummy database for example.
784 {
785 $this->links = array();
786 $link = array('title'=>'Shaarli - sebsauvage.net','url'=>'http://sebsauvage.net/wiki/doku.php?id=php:shaarli','description'=>'Welcome to Shaarli ! This is a bookmark. To edit or delete me, you must first login.','private'=>0,'linkdate'=>'20110914_190000','tags'=>'opensource software');
787 $this->links[$link['linkdate']] = $link;
788 $link = array('title'=>'My secret stuff... - Pastebin.com','url'=>'http://sebsauvage.net/paste/?8434b27936c09649#bR7XsXhoTiLcqCpQbmOpBi3rq2zzQUC5hBI7ZT1O3x8=','description'=>'SShhhh!! I\'m a private link only YOU can see. You can delete me too.','private'=>1,'linkdate'=>'20110914_074522','tags'=>'secretstuff');
789 $this->links[$link['linkdate']] = $link;
790 file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
791 }
792 }
793
794 // Read database from disk to memory
795 private function readdb()
796 {
797 // Read data
798 $this->links=(file_exists($GLOBALS['config']['DATASTORE']) ? unserialize(gzinflate(base64_decode(substr(file_get_contents($GLOBALS['config']['DATASTORE']),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
799 // Note that gzinflate is faster than gzuncompress. See: http://www.php.net/manual/en/function.gzdeflate.php#96439
800
801 // If user is not logged in, filter private links.
802 if (!$this->loggedin)
803 {
804 $toremove=array();
805 foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
806 foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
807 }
808
809 // Keep the list of the mapping URLs-->linkdate up-to-date.
810 $this->urls=array();
811 foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
812 }
813
814 // Save database from memory to disk.
815 public function savedb()
816 {
817 if (!$this->loggedin) die('You are not authorized to change the database.');
818 file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
819 invalidateCaches();
820 }
821
822 // Returns the link for a given URL (if it exists). False if it does not exist.
823 public function getLinkFromUrl($url)
824 {
825 if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
826 return false;
827 }
828
829 // Case insensitive search among links (in the URLs, title and description). Returns filtered list of links.
830 // e.g. print_r($mydb->filterFulltext('hollandais'));
831 public function filterFulltext($searchterms)
832 {
833 // FIXME: explode(' ',$searchterms) and perform a AND search.
834 // FIXME: accept double-quotes to search for a string "as is"?
835 // Using mb_convert_case($val, MB_CASE_LOWER, 'UTF-8') allows us to perform searches on
836 // Unicode text. See https://github.com/shaarli/Shaarli/issues/75 for examples.
837 $filtered=array();
838 $s = mb_convert_case($searchterms, MB_CASE_LOWER, 'UTF-8');
839 foreach($this->links as $l)
840 {
841 $found= (strpos(mb_convert_case($l['title'], MB_CASE_LOWER, 'UTF-8'),$s) !== false)
842 || (strpos(mb_convert_case($l['description'], MB_CASE_LOWER, 'UTF-8'),$s) !== false)
843 || (strpos(mb_convert_case($l['url'], MB_CASE_LOWER, 'UTF-8'),$s) !== false)
844 || (strpos(mb_convert_case($l['tags'], MB_CASE_LOWER, 'UTF-8'),$s) !== false);
845 if ($found) $filtered[$l['linkdate']] = $l;
846 }
847 krsort($filtered);
848 return $filtered;
849 }
850
851 // Filter by tag.
852 // You can specify one or more tags (tags can be separated by space or comma).
853 // e.g. print_r($mydb->filterTags('linux programming'));
854 public function filterTags($tags,$casesensitive=false)
855 {
856 // Same as above, we use UTF-8 conversion to handle various graphemes (i.e. cyrillic, or greek)
857 // TODO: is $casesensitive ever true ?
858 $t = str_replace(',',' ',($casesensitive?$tags:mb_convert_case($tags, MB_CASE_LOWER, 'UTF-8')));
859 $searchtags=explode(' ',$t);
860 $filtered=array();
861 foreach($this->links as $l)
862 {
863 $linktags = explode(' ',($casesensitive?$l['tags']:mb_convert_case($l['tags'], MB_CASE_LOWER, 'UTF-8')));
864 if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
865 $filtered[$l['linkdate']] = $l;
866 }
867 krsort($filtered);
868 return $filtered;
869 }
870
871 // Filter by day. Day must be in the form 'YYYYMMDD' (e.g. '20120125')
872 // Sort order is: older articles first.
873 // e.g. print_r($mydb->filterDay('20120125'));
874 public function filterDay($day)
875 {
876 $filtered=array();
877 foreach($this->links as $l)
878 {
879 if (startsWith($l['linkdate'],$day)) $filtered[$l['linkdate']] = $l;
880 }
881 ksort($filtered);
882 return $filtered;
883 }
884 // Filter by smallHash.
885 // Only 1 article is returned.
886 public function filterSmallHash($smallHash)
887 {
888 $filtered=array();
889 foreach($this->links as $l)
890 {
891 if ($smallHash==smallHash($l['linkdate'])) // Yes, this is ugly and slow
892 {
893 $filtered[$l['linkdate']] = $l;
894 return $filtered;
895 }
896 }
897 return $filtered;
898 }
899
900 // Returns the list of all tags
901 // Output: associative array key=tags, value=0
902 public function allTags()
903 {
904 $tags=array();
905 foreach($this->links as $link)
906 foreach(explode(' ',$link['tags']) as $tag)
907 if (!empty($tag)) $tags[$tag]=(empty($tags[$tag]) ? 1 : $tags[$tag]+1);
908 arsort($tags); // Sort tags by usage (most used tag first)
909 return $tags;
910 }
911
912 // Returns the list of days containing articles (oldest first)
913 // Output: An array containing days (in format YYYYMMDD).
914 public function days()
915 {
916 $linkdays=array();
917 foreach(array_keys($this->links) as $day)
918 {
919 $linkdays[substr($day,0,8)]=0;
920 }
921 $linkdays=array_keys($linkdays);
922 sort($linkdays);
923 return $linkdays;
924 }
925 }
926
927 // ------------------------------------------------------------------------------------------
928 // Output the last N links in RSS 2.0 format.
929 function showRSS()
930 {
931 header('Content-Type: application/rss+xml; charset=utf-8');
932
933 // $usepermalink : If true, use permalink instead of final link.
934 // User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=rss&permalinks
935 // Also enabled through a config option
936 $usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
937
938 // Cache system
939 $query = $_SERVER["QUERY_STRING"];
940 $cache = new pageCache(pageUrl(),startsWith($query,'do=rss') && !isLoggedIn());
941 $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
942
943 // If cached was not found (or not usable), then read the database and build the response:
944 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if user it not logged in).
945
946 // Optionally filter the results:
947 $linksToDisplay=array();
948 if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
949 elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
950 else $linksToDisplay = $LINKSDB;
951 $nblinksToDisplay = 50; // Number of links to display.
952 if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
953 {
954 $nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
955 }
956
957 $pageaddr=htmlspecialchars(indexUrl());
958 echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
959 echo '<channel><title>'.htmlspecialchars($GLOBALS['title']).'</title><link>'.$pageaddr.'</link>';
960 echo '<description>Shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n\n";
961 if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
962 {
963 echo '<!-- PubSubHubbub Discovery -->';
964 echo '<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" xmlns="http://www.w3.org/2005/Atom" />';
965 echo '<link rel="self" href="'.htmlspecialchars($pageaddr).'?do=rss" xmlns="http://www.w3.org/2005/Atom" />';
966 echo '<!-- End Of PubSubHubbub Discovery -->';
967 }
968 $i=0;
969 $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
970 while ($i<$nblinksToDisplay && $i<count($keys))
971 {
972 $link = $linksToDisplay[$keys[$i]];
973 $guid = $pageaddr.'?'.smallHash($link['linkdate']);
974 $rfc822date = linkdate2rfc822($link['linkdate']);
975 $absurl = htmlspecialchars($link['url']);
976 if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
977 if ($usepermalinks===true)
978 echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="true">'.$guid.'</guid><link>'.$guid.'</link>';
979 else
980 echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$absurl.'</link>';
981 if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) echo '<pubDate>'.htmlspecialchars($rfc822date)."</pubDate>\n";
982 if ($link['tags']!='') // Adding tags to each RSS entry (as mentioned in RSS specification)
983 {
984 foreach(explode(' ',$link['tags']) as $tag) { echo '<category domain="'.htmlspecialchars($pageaddr).'">'.htmlspecialchars($tag).'</category>'."\n"; }
985 }
986
987 // Add permalink in description
988 $descriptionlink = '(<a href="'.$guid.'">Permalink</a>)';
989 // If user wants permalinks first, put the final link in description
990 if ($usepermalinks===true) $descriptionlink = '(<a href="'.$absurl.'">Link</a>)';
991 if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink;
992 echo '<description><![CDATA['.nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description'])))).$descriptionlink.']]></description>'."\n</item>\n";
993 $i++;
994 }
995 echo '</channel></rss><!-- Cached version of '.htmlspecialchars(pageUrl()).' -->';
996
997 $cache->cache(ob_get_contents());
998 ob_end_flush();
999 exit;
1000 }
1001
1002 // ------------------------------------------------------------------------------------------
1003 // Output the last N links in ATOM format.
1004 function showATOM()
1005 {
1006 header('Content-Type: application/atom+xml; charset=utf-8');
1007
1008 // $usepermalink : If true, use permalink instead of final link.
1009 // User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=atom&permalinks
1010 $usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
1011
1012 // Cache system
1013 $query = $_SERVER["QUERY_STRING"];
1014 $cache = new pageCache(pageUrl(),startsWith($query,'do=atom') && !isLoggedIn());
1015 $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
1016 // If cached was not found (or not usable), then read the database and build the response:
1017
1018 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
1019
1020
1021 // Optionally filter the results:
1022 $linksToDisplay=array();
1023 if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
1024 elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
1025 else $linksToDisplay = $LINKSDB;
1026 $nblinksToDisplay = 50; // Number of links to display.
1027 if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
1028 {
1029 $nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
1030 }
1031
1032 $pageaddr=htmlspecialchars(indexUrl());
1033 $latestDate = '';
1034 $entries='';
1035 $i=0;
1036 $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
1037 while ($i<$nblinksToDisplay && $i<count($keys))
1038 {
1039 $link = $linksToDisplay[$keys[$i]];
1040 $guid = $pageaddr.'?'.smallHash($link['linkdate']);
1041 $iso8601date = linkdate2iso8601($link['linkdate']);
1042 $latestDate = max($latestDate,$iso8601date);
1043 $absurl = htmlspecialchars($link['url']);
1044 if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
1045 $entries.='<entry><title>'.htmlspecialchars($link['title']).'</title>';
1046 if ($usepermalinks===true)
1047 $entries.='<link href="'.$guid.'" /><id>'.$guid.'</id>';
1048 else
1049 $entries.='<link href="'.$absurl.'" /><id>'.$guid.'</id>';
1050 if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $entries.='<updated>'.htmlspecialchars($iso8601date).'</updated>';
1051
1052 // Add permalink in description
1053 $descriptionlink = htmlspecialchars('(<a href="'.$guid.'">Permalink</a>)');
1054 // If user wants permalinks first, put the final link in description
1055 if ($usepermalinks===true) $descriptionlink = htmlspecialchars('(<a href="'.$absurl.'">Link</a>)');
1056 if (strlen($link['description'])>0) $descriptionlink = '&lt;br&gt;'.$descriptionlink;
1057
1058 $entries.='<content type="html">'.htmlspecialchars(nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))))).$descriptionlink."</content>\n";
1059 if ($link['tags']!='') // Adding tags to each ATOM entry (as mentioned in ATOM specification)
1060 {
1061 foreach(explode(' ',$link['tags']) as $tag)
1062 { $entries.='<category scheme="'.htmlspecialchars($pageaddr,ENT_QUOTES).'" term="'.htmlspecialchars($tag,ENT_QUOTES).'" />'."\n"; }
1063 }
1064 $entries.="</entry>\n";
1065 $i++;
1066 }
1067 $feed='<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">';
1068 $feed.='<title>'.htmlspecialchars($GLOBALS['title']).'</title>';
1069 if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $feed.='<updated>'.htmlspecialchars($latestDate).'</updated>';
1070 $feed.='<link rel="self" href="'.htmlspecialchars(serverUrl().$_SERVER["REQUEST_URI"]).'" />';
1071 if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
1072 {
1073 $feed.='<!-- PubSubHubbub Discovery -->';
1074 $feed.='<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" />';
1075 $feed.='<!-- End Of PubSubHubbub Discovery -->';
1076 }
1077 $feed.='<author><name>'.htmlspecialchars($pageaddr).'</name><uri>'.htmlspecialchars($pageaddr).'</uri></author>';
1078 $feed.='<id>'.htmlspecialchars($pageaddr).'</id>'."\n\n"; // Yes, I know I should use a real IRI (RFC3987), but the site URL will do.
1079 $feed.=$entries;
1080 $feed.='</feed><!-- Cached version of '.htmlspecialchars(pageUrl()).' -->';
1081 echo $feed;
1082
1083 $cache->cache(ob_get_contents());
1084 ob_end_flush();
1085 exit;
1086 }
1087
1088 // ------------------------------------------------------------------------------------------
1089 // Daily RSS feed: 1 RSS entry per day giving all the links on that day.
1090 // Gives the last 7 days (which have links).
1091 // This RSS feed cannot be filtered.
1092 function showDailyRSS()
1093 {
1094 // Cache system
1095 $query = $_SERVER["QUERY_STRING"];
1096 $cache = new pageCache(pageUrl(),startsWith($query,'do=dailyrss') && !isLoggedIn());
1097 $cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
1098 // If cached was not found (or not usable), then read the database and build the response:
1099 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
1100
1101 /* Some Shaarlies may have very few links, so we need to look
1102 back in time (rsort()) until we have enough days ($nb_of_days).
1103 */
1104 $linkdates=array(); foreach($LINKSDB as $linkdate=>$value) { $linkdates[]=$linkdate; }
1105 rsort($linkdates);
1106 $nb_of_days=7; // We take 7 days.
1107 $today=Date('Ymd');
1108 $days=array();
1109 foreach($linkdates as $linkdate)
1110 {
1111 $day=substr($linkdate,0,8); // Extract day (without time)
1112 if (strcmp($day,$today)<0)
1113 {
1114 if (empty($days[$day])) $days[$day]=array();
1115 $days[$day][]=$linkdate;
1116 }
1117 if (count($days)>$nb_of_days) break; // Have we collected enough days?
1118 }
1119
1120 // Build the RSS feed.
1121 header('Content-Type: application/rss+xml; charset=utf-8');
1122 $pageaddr=htmlspecialchars(indexUrl());
1123 echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
1124 echo '<channel><title>Daily - '.htmlspecialchars($GLOBALS['title']).'</title><link>'.$pageaddr.'</link>';
1125 echo '<description>Daily shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n";
1126
1127 foreach($days as $day=>$linkdates) // For each day.
1128 {
1129 $daydate = utf8_encode(strftime('%A %d, %B %Y',linkdate2timestamp($day.'_000000'))); // Full text date
1130 $rfc822date = linkdate2rfc822($day.'_000000');
1131 $absurl=htmlspecialchars(indexUrl().'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page.
1132 echo '<item><title>'.htmlspecialchars($GLOBALS['title'].' - '.$daydate).'</title><guid>'.$absurl.'</guid><link>'.$absurl.'</link>';
1133 echo '<pubDate>'.htmlspecialchars($rfc822date)."</pubDate>";
1134
1135 // Build the HTML body of this RSS entry.
1136 $html='';
1137 $href='';
1138 $links=array();
1139 // We pre-format some fields for proper output.
1140 foreach($linkdates as $linkdate)
1141 {
1142 $l = $LINKSDB[$linkdate];
1143 $l['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($l['description']))));
1144 $l['thumbnail'] = thumbnail($l['url']);
1145 $l['localdate']=linkdate2locale($l['linkdate']);
1146 if (startsWith($l['url'],'?')) $l['url']=indexUrl().$l['url']; // make permalink URL absolute
1147 $links[$linkdate]=$l;
1148 }
1149 // Then build the HTML for this day:
1150 $tpl = new RainTPL;
1151 $tpl->assign('links',$links);
1152 $html = $tpl->draw('dailyrss',$return_string=true);
1153 echo "\n";
1154 echo '<description><![CDATA['.$html.']]></description>'."\n</item>\n\n";
1155
1156 }
1157 echo '</channel></rss><!-- Cached version of '.htmlspecialchars(pageUrl()).' -->';
1158
1159 $cache->cache(ob_get_contents());
1160 ob_end_flush();
1161 exit;
1162 }
1163
1164 // "Daily" page.
1165 function showDaily()
1166 {
1167 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
1168
1169
1170 $day=Date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
1171 if (isset($_GET['day'])) $day=$_GET['day'];
1172
1173 $days = $LINKSDB->days();
1174 $i = array_search($day,$days);
1175 if ($i==false) { $i=count($days)-1; $day=$days[$i]; }
1176 $previousday='';
1177 $nextday='';
1178 if ($i!==false)
1179 {
1180 if ($i>1) $previousday=$days[$i-1];
1181 if ($i<count($days)-1) $nextday=$days[$i+1];
1182 }
1183
1184 $linksToDisplay=$LINKSDB->filterDay($day);
1185 // We pre-format some fields for proper output.
1186 foreach($linksToDisplay as $key=>$link)
1187 {
1188 $taglist = explode(' ',$link['tags']);
1189 uasort($taglist, 'strcasecmp');
1190 $linksToDisplay[$key]['taglist']=$taglist;
1191 $linksToDisplay[$key]['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))));
1192 $linksToDisplay[$key]['thumbnail'] = thumbnail($link['url']);
1193 $linksToDisplay[$key]['localdate'] = linkdate2locale($link['linkdate']);
1194 }
1195
1196 /* We need to spread the articles on 3 columns.
1197 I did not want to use a JavaScript lib like http://masonry.desandro.com/
1198 so I manually spread entries with a simple method: I roughly evaluate the
1199 height of a div according to title and description length.
1200 */
1201 $columns=array(array(),array(),array()); // Entries to display, for each column.
1202 $fill=array(0,0,0); // Rough estimate of columns fill.
1203 foreach($linksToDisplay as $key=>$link)
1204 {
1205 // Roughly estimate length of entry (by counting characters)
1206 // Title: 30 chars = 1 line. 1 line is 30 pixels height.
1207 // Description: 836 characters gives roughly 342 pixel height.
1208 // This is not perfect, but it's usually OK.
1209 $length=strlen($link['title'])+(342*strlen($link['description']))/836;
1210 if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
1211 // Then put in column which is the less filled:
1212 $smallest=min($fill); // find smallest value in array.
1213 $index=array_search($smallest,$fill); // find index of this smallest value.
1214 array_push($columns[$index],$link); // Put entry in this column.
1215 $fill[$index]+=$length;
1216 }
1217 $PAGE = new pageBuilder;
1218 $PAGE->assign('linksToDisplay',$linksToDisplay);
1219 $PAGE->assign('linkcount',count($LINKSDB));
1220 $PAGE->assign('cols', $columns);
1221 $PAGE->assign('day',utf8_encode(strftime('%A %d, %B %Y',linkdate2timestamp($day.'_000000'))));
1222 $PAGE->assign('previousday',$previousday);
1223 $PAGE->assign('nextday',$nextday);
1224 $PAGE->renderPage('daily');
1225 exit;
1226 }
1227
1228
1229 // ------------------------------------------------------------------------------------------
1230 // Render HTML page (according to URL parameters and user rights)
1231 function renderPage()
1232 {
1233 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
1234
1235 // -------- Display login form.
1236 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=login'))
1237 {
1238 if ($GLOBALS['config']['OPEN_SHAARLI']) { header('Location: ?'); exit; } // No need to login for open Shaarli
1239 $token=''; if (ban_canLogin()) $token=getToken(); // Do not waste token generation if not useful.
1240 $PAGE = new pageBuilder;
1241 $PAGE->assign('token',$token);
1242 $PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER']:''));
1243 $PAGE->renderPage('loginform');
1244 exit;
1245 }
1246 // -------- User wants to logout.
1247 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=logout'))
1248 {
1249 invalidateCaches();
1250 logout();
1251 header('Location: ?');
1252 exit;
1253 }
1254
1255 // -------- Picture wall
1256 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=picwall'))
1257 {
1258 // Optionally filter the results:
1259 $links=array();
1260 if (!empty($_GET['searchterm'])) $links = $LINKSDB->filterFulltext($_GET['searchterm']);
1261 elseif (!empty($_GET['searchtags'])) $links = $LINKSDB->filterTags(trim($_GET['searchtags']));
1262 else $links = $LINKSDB;
1263 $body='';
1264 $linksToDisplay=array();
1265
1266 // Get only links which have a thumbnail.
1267 foreach($links as $link)
1268 {
1269 $permalink='?'.htmlspecialchars(smallhash($link['linkdate']),ENT_QUOTES);
1270 $thumb=lazyThumbnail($link['url'],$permalink);
1271 if ($thumb!='') // Only output links which have a thumbnail.
1272 {
1273 $link['thumbnail']=$thumb; // Thumbnail HTML code.
1274 $link['permalink']=$permalink;
1275 $linksToDisplay[]=$link; // Add to array.
1276 }
1277 }
1278 $PAGE = new pageBuilder;
1279 $PAGE->assign('linkcount',count($LINKSDB));
1280 $PAGE->assign('linksToDisplay',$linksToDisplay);
1281 $PAGE->renderPage('picwall');
1282 exit;
1283 }
1284
1285 // -------- Tag cloud
1286 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tagcloud'))
1287 {
1288 $tags= $LINKSDB->allTags();
1289 // We sort tags alphabetically, then choose a font size according to count.
1290 // First, find max value.
1291 $maxcount=0; foreach($tags as $key=>$value) $maxcount=max($maxcount,$value);
1292 ksort($tags);
1293 $tagList=array();
1294 foreach($tags as $key=>$value)
1295 // Tag font size scaling: default 15 and 30 logarithm bases affect scaling, 22 and 6 are arbitrary font sizes for max and min sizes.
1296 {
1297 $tagList[$key] = array('count'=>$value,'size'=>log($value, 15) / log($maxcount, 30) * (22-6) + 6);
1298 }
1299 $PAGE = new pageBuilder;
1300 $PAGE->assign('linkcount',count($LINKSDB));
1301 $PAGE->assign('tags',$tagList);
1302 $PAGE->renderPage('tagcloud');
1303 exit;
1304 }
1305
1306 // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
1307 if (isset($_GET['addtag']))
1308 {
1309 // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
1310 if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
1311 parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
1312
1313 // Check if this tag is already in the search query and ignore it if it is.
1314 // Each tag is always separated by a space
1315 $current_tags = explode(' ', $params['searchtags']);
1316 $addtag = true;
1317 foreach ($current_tags as $value) {
1318 if ($value === $_GET['addtag']) {
1319 $addtag = false;
1320 break;
1321 }
1322 }
1323 // Append the tag if necessary
1324 if (empty($params['searchtags'])) {
1325 $params['searchtags'] = trim($_GET['addtag']);
1326 }
1327 else if ($addtag) {
1328 $params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
1329 }
1330
1331 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1332 header('Location: ?'.http_build_query($params));
1333 exit;
1334 }
1335
1336 // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
1337 if (isset($_GET['removetag']))
1338 {
1339 // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
1340 if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER
1341 parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
1342 if (isset($params['searchtags']))
1343 {
1344 $tags = explode(' ',$params['searchtags']);
1345 $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags.
1346 if (count($tags)==0) unset($params['searchtags']); else $params['searchtags'] = implode(' ',$tags);
1347 unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
1348 }
1349 header('Location: ?'.http_build_query($params));
1350 exit;
1351 }
1352
1353 // -------- User wants to change the number of links per page (linksperpage=...)
1354 if (isset($_GET['linksperpage']))
1355 {
1356 if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); }
1357 // Make sure the referrer is Shaarli itself.
1358 $referer = '?';
1359 if (!empty($_SERVER['HTTP_REFERER']) && strcmp(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_HOST),$_SERVER['HTTP_HOST'])==0)
1360 $referer = $_SERVER['HTTP_REFERER'];
1361 header('Location: '.$referer);
1362 exit;
1363 }
1364
1365 // -------- User wants to see only private links (toggle)
1366 if (isset($_GET['privateonly']))
1367 {
1368 if (empty($_SESSION['privateonly']))
1369 {
1370 $_SESSION['privateonly']=1; // See only private links
1371 }
1372 else
1373 {
1374 unset($_SESSION['privateonly']); // See all links
1375 }
1376 // Make sure the referrer is Shaarli itself.
1377 $referer = '?';
1378 if (!empty($_SERVER['HTTP_REFERER']) && strcmp(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_HOST),$_SERVER['HTTP_HOST'])==0)
1379 $referer = $_SERVER['HTTP_REFERER'];
1380 header('Location: '.$referer);
1381 exit;
1382 }
1383
1384 // -------- Handle other actions allowed for non-logged in users:
1385 if (!isLoggedIn())
1386 {
1387 // User tries to post new link but is not logged in:
1388 // Show login screen, then redirect to ?post=...
1389 if (isset($_GET['post']))
1390 {
1391 header('Location: ?do=login&post='.urlencode($_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.
1392 exit;
1393 }
1394
1395 // Same case as above except that user tried to access ?do=addlink without being logged in
1396 // Note: passing empty parameters makes Shaarli generate default URLs and descriptions.
1397 if (isset($_GET['do']) && $_GET['do'] === 'addlink') {
1398 header('Location: ?do=login&post=');
1399 exit;
1400 }
1401
1402 $PAGE = new pageBuilder;
1403 buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
1404 $PAGE->renderPage('linklist');
1405 exit; // Never remove this one! All operations below are reserved for logged in user.
1406 }
1407
1408 // -------- All other functions are reserved for the registered user:
1409
1410 // -------- Display the Tools menu if requested (import/export/bookmarklet...)
1411 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tools'))
1412 {
1413 $PAGE = new pageBuilder;
1414 $PAGE->assign('linkcount',count($LINKSDB));
1415 $PAGE->assign('pageabsaddr',indexUrl());
1416 $PAGE->renderPage('tools');
1417 exit;
1418 }
1419
1420 // -------- User wants to change his/her password.
1421 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changepasswd'))
1422 {
1423 if ($GLOBALS['config']['OPEN_SHAARLI']) die('You are not supposed to change a password on an Open Shaarli.');
1424 if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
1425 {
1426 if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1427
1428 // Make sure old password is correct.
1429 $oldhash = sha1($_POST['oldpassword'].$GLOBALS['login'].$GLOBALS['salt']);
1430 if ($oldhash!=$GLOBALS['hash']) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
1431 // Save new password
1432 $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
1433 $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
1434 writeConfig();
1435 echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
1436 exit;
1437 }
1438 else // show the change password form.
1439 {
1440 $PAGE = new pageBuilder;
1441 $PAGE->assign('linkcount',count($LINKSDB));
1442 $PAGE->assign('token',getToken());
1443 $PAGE->renderPage('changepassword');
1444 exit;
1445 }
1446 }
1447
1448 // -------- User wants to change configuration
1449 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=configure'))
1450 {
1451 if (!empty($_POST['title']) )
1452 {
1453 if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1454 $tz = 'UTC';
1455 if (!empty($_POST['continent']) && !empty($_POST['city']))
1456 if (isTZvalid($_POST['continent'],$_POST['city']))
1457 $tz = $_POST['continent'].'/'.$_POST['city'];
1458 $GLOBALS['timezone'] = $tz;
1459 $GLOBALS['title']=$_POST['title'];
1460 $GLOBALS['titleLink']=$_POST['titleLink'];
1461 $GLOBALS['redirector']=$_POST['redirector'];
1462 $GLOBALS['disablesessionprotection']=!empty($_POST['disablesessionprotection']);
1463 $GLOBALS['disablejquery']=!empty($_POST['disablejquery']);
1464 $GLOBALS['privateLinkByDefault']=!empty($_POST['privateLinkByDefault']);
1465 $GLOBALS['config']['ENABLE_RSS_PERMALINKS']= !empty($_POST['enableRssPermalinks']);
1466 $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
1467 writeConfig();
1468 echo '<script>alert("Configuration was saved.");document.location=\'?do=tools\';</script>';
1469 exit;
1470 }
1471 else // Show the configuration form.
1472 {
1473 $PAGE = new pageBuilder;
1474 $PAGE->assign('linkcount',count($LINKSDB));
1475 $PAGE->assign('token',getToken());
1476 $PAGE->assign('title',htmlspecialchars( empty($GLOBALS['title']) ? '' : $GLOBALS['title'] , ENT_QUOTES));
1477 $PAGE->assign('redirector',htmlspecialchars( empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'] , ENT_QUOTES));
1478 list($timezone_form,$timezone_js) = templateTZform($GLOBALS['timezone']);
1479 $PAGE->assign('timezone_form',$timezone_form); // FIXME: Put entire tz form generation in template?
1480 $PAGE->assign('timezone_js',$timezone_js);
1481 $PAGE->renderPage('configure');
1482 exit;
1483 }
1484 }
1485
1486 // -------- User wants to rename a tag or delete it
1487 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changetag'))
1488 {
1489 if (empty($_POST['fromtag']))
1490 {
1491 $PAGE = new pageBuilder;
1492 $PAGE->assign('linkcount',count($LINKSDB));
1493 $PAGE->assign('token',getToken());
1494 $PAGE->renderPage('changetag');
1495 exit;
1496 }
1497 if (!tokenOk($_POST['token'])) die('Wrong token.');
1498
1499 // Delete a tag:
1500 if (!empty($_POST['deletetag']) && !empty($_POST['fromtag']))
1501 {
1502 $needle=trim($_POST['fromtag']);
1503 $linksToAlter = $LINKSDB->filterTags($needle,true); // True for case-sensitive tag search.
1504 foreach($linksToAlter as $key=>$value)
1505 {
1506 $tags = explode(' ',trim($value['tags']));
1507 unset($tags[array_search($needle,$tags)]); // Remove tag.
1508 $value['tags']=trim(implode(' ',$tags));
1509 $LINKSDB[$key]=$value;
1510 }
1511 $LINKSDB->savedb(); // Save to disk.
1512 echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
1513 exit;
1514 }
1515
1516 // Rename a tag:
1517 if (!empty($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag']))
1518 {
1519 $needle=trim($_POST['fromtag']);
1520 $linksToAlter = $LINKSDB->filterTags($needle,true); // true for case-sensitive tag search.
1521 foreach($linksToAlter as $key=>$value)
1522 {
1523 $tags = explode(' ',trim($value['tags']));
1524 $tags[array_search($needle,$tags)] = trim($_POST['totag']); // Replace tags value.
1525 $value['tags']=trim(implode(' ',$tags));
1526 $LINKSDB[$key]=$value;
1527 }
1528 $LINKSDB->savedb(); // Save to disk.
1529 echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>';
1530 exit;
1531 }
1532 }
1533
1534 // -------- User wants to add a link without using the bookmarklet: Show form.
1535 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=addlink'))
1536 {
1537 $PAGE = new pageBuilder;
1538 $PAGE->assign('linkcount',count($LINKSDB));
1539 $PAGE->renderPage('addlink');
1540 exit;
1541 }
1542
1543 // -------- User clicked the "Save" button when editing a link: Save link to database.
1544 if (isset($_POST['save_edit']))
1545 {
1546 if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
1547 $tags = trim(preg_replace('/\s\s+/',' ', $_POST['lf_tags'])); // Remove multiple spaces.
1548 $linkdate=$_POST['lf_linkdate'];
1549 $url = trim($_POST['lf_url']);
1550 if (!startsWith($url,'http:') && !startsWith($url,'https:') && !startsWith($url,'ftp:') && !startsWith($url,'magnet:') && !startsWith($url,'?'))
1551 $url = 'http://'.$url;
1552 $link = array('title'=>trim($_POST['lf_title']),'url'=>$url,'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
1553 'linkdate'=>$linkdate,'tags'=>str_replace(',',' ',$tags));
1554 if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
1555 $LINKSDB[$linkdate] = $link;
1556 $LINKSDB->savedb(); // Save to disk.
1557 pubsubhub();
1558
1559 // If we are called from the bookmarklet, we must close the popup:
1560 if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script>self.close();</script>'; exit; }
1561 $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1562 $returnurl .= '#'.smallHash($linkdate); // Scroll to the link which has been edited.
1563 header('Location: '.$returnurl); // After saving the link, redirect to the page the user was on.
1564 exit;
1565 }
1566
1567 // -------- User clicked the "Cancel" button when editing a link.
1568 if (isset($_POST['cancel_edit']))
1569 {
1570 // If we are called from the bookmarklet, we must close the popup:
1571 if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script>self.close();</script>'; exit; }
1572 $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
1573 $returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited.
1574 header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
1575 exit;
1576 }
1577
1578 // -------- User clicked the "Delete" button when editing a link: Delete link from database.
1579 if (isset($_POST['delete_link']))
1580 {
1581 if (!tokenOk($_POST['token'])) die('Wrong token.');
1582 // We do not need to ask for confirmation:
1583 // - confirmation is handled by JavaScript
1584 // - we are protected from XSRF by the token.
1585 $linkdate=$_POST['lf_linkdate'];
1586 unset($LINKSDB[$linkdate]);
1587 $LINKSDB->savedb(); // save to disk
1588
1589 // If we are called from the bookmarklet, we must close the popup:
1590 if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script>self.close();</script>'; exit; }
1591 // Pick where we're going to redirect
1592 // =============================================================
1593 // Basically, we can't redirect to where we were previously if it was a permalink
1594 // or an edit_link, because it would 404.
1595 // Cases:
1596 // - / : nothing in $_GET, redirect to self
1597 // - /?page : redirect to self
1598 // - /?searchterm : redirect to self (there might be other links)
1599 // - /?searchtags : redirect to self
1600 // - /permalink : redirect to / (the link does not exist anymore)
1601 // - /?edit_link : redirect to / (the link does not exist anymore)
1602 // PHP treats the permalink as a $_GET variable, so we need to check if every condition for self
1603 // redirect is not satisfied, and only then redirect to /
1604 $location = "?";
1605 // Self redirection
1606 if (count($_GET) == 0 ||
1607 isset($_GET['page']) ||
1608 isset($_GET['searchterm']) ||
1609 isset($_GET['searchtags'])) {
1610
1611 if (isset($_POST['returnurl'])) {
1612 $location = $_POST['returnurl']; // Handle redirects given by the form
1613 }
1614
1615 if ($location === "?" &&
1616 isset($_SERVER['HTTP_REFERER'])) { // Handle HTTP_REFERER in case we're not coming from the same place.
1617 $location = $_SERVER['HTTP_REFERER'];
1618 }
1619 }
1620
1621 header('Location: ' . $location); // After deleting the link, redirect to appropriate location
1622 exit;
1623 }
1624
1625 // -------- User clicked the "EDIT" button on a link: Display link edit form.
1626 if (isset($_GET['edit_link']))
1627 {
1628 $link = $LINKSDB[$_GET['edit_link']]; // Read database
1629 if (!$link) { header('Location: ?'); exit; } // Link not found in database.
1630 $PAGE = new pageBuilder;
1631 $PAGE->assign('linkcount',count($LINKSDB));
1632 $PAGE->assign('link',$link);
1633 $PAGE->assign('link_is_new',false);
1634 $PAGE->assign('token',getToken()); // XSRF protection.
1635 $PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : ''));
1636 $PAGE->renderPage('editlink');
1637 exit;
1638 }
1639
1640 // -------- User want to post a new link: Display link edit form.
1641 if (isset($_GET['post']))
1642 {
1643 $url=$_GET['post'];
1644
1645 // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
1646 $i=strpos($url,'&utm_source='); if ($i!==false) $url=substr($url,0,$i);
1647 $i=strpos($url,'?utm_source='); if ($i!==false) $url=substr($url,0,$i);
1648 $i=strpos($url,'#xtor=RSS-'); if ($i!==false) $url=substr($url,0,$i);
1649
1650 $link_is_new = false;
1651 $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link)
1652 if (!$link)
1653 {
1654 $link_is_new = true; // This is a new link
1655 $linkdate = strval(date('Ymd_His'));
1656 $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet).
1657 $description = (empty($_GET['description']) ? '' : $_GET['description']); // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
1658 $tags = (empty($_GET['tags']) ? '' : $_GET['tags'] ); // Get tags if it was provided in URL
1659 $private = (!empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0); // Get private if it was provided in URL
1660 if (($url!='') && parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url;
1661 // If this is an HTTP link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
1662 if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http')
1663 {
1664 list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive.
1665 // FIXME: Decode charset according to specified in either 1) HTTP response headers or 2) <head> in html
1666 if (strpos($status,'200 OK')!==false)
1667 {
1668 // Look for charset in html header.
1669 preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
1670
1671 // If found, extract encoding.
1672 if (!empty($meta[0]))
1673 {
1674 // Get encoding specified in header.
1675 preg_match('#charset="?(.*)"#si', $meta[0], $enc);
1676 // If charset not found, use utf-8.
1677 $html_charset = (!empty($enc[1])) ? strtolower($enc[1]) : 'utf-8';
1678 }
1679 else { $html_charset = 'utf-8'; }
1680
1681 // Extract title
1682 $title = html_extract_title($data);
1683 if (!empty($title))
1684 {
1685 // Re-encode title in utf-8 if necessary.
1686 $title = ($html_charset == 'iso-8859-1') ? utf8_encode($title) : $title;
1687 }
1688 }
1689 }
1690 if ($url=='') // In case of empty URL, this is just a text (with a link that points to itself)
1691 {
1692 $url='?'.smallHash($linkdate);
1693 $title='Note: ';
1694 }
1695 $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>$private);
1696 }
1697
1698 $PAGE = new pageBuilder;
1699 $PAGE->assign('linkcount',count($LINKSDB));
1700 $PAGE->assign('link',$link);
1701 $PAGE->assign('link_is_new',$link_is_new);
1702 $PAGE->assign('token',getToken()); // XSRF protection.
1703 $PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : ''));
1704 $PAGE->renderPage('editlink');
1705 exit;
1706 }
1707
1708 // -------- Export as Netscape Bookmarks HTML file.
1709 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=export'))
1710 {
1711 if (empty($_GET['what']))
1712 {
1713 $PAGE = new pageBuilder;
1714 $PAGE->assign('linkcount',count($LINKSDB));
1715 $PAGE->renderPage('export');
1716 exit;
1717 }
1718 $exportWhat=$_GET['what'];
1719 if (!array_intersect(array('all','public','private'),array($exportWhat))) die('What are you trying to export???');
1720
1721 header('Content-Type: text/html; charset=utf-8');
1722 header('Content-disposition: attachment; filename=bookmarks_'.$exportWhat.'_'.strval(date('Ymd_His')).'.html');
1723 $currentdate=date('Y/m/d H:i:s');
1724 echo <<<HTML
1725 <!DOCTYPE NETSCAPE-Bookmark-file-1>
1726 <!-- This is an automatically generated file.
1727 It will be read and overwritten.
1728 DO NOT EDIT! -->
1729 <!-- Shaarli {$exportWhat} bookmarks export on {$currentdate} -->
1730 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
1731 <TITLE>Bookmarks</TITLE>
1732 <H1>Bookmarks</H1>
1733 HTML;
1734 foreach($LINKSDB as $link)
1735 {
1736 if ($exportWhat=='all' ||
1737 ($exportWhat=='private' && $link['private']!=0) ||
1738 ($exportWhat=='public' && $link['private']==0))
1739 {
1740 echo '<DT><A HREF="'.htmlspecialchars($link['url']).'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
1741 if ($link['tags']!='') echo ' TAGS="'.htmlspecialchars(str_replace(' ',',',$link['tags'])).'"';
1742 echo '>'.htmlspecialchars($link['title'])."</A>\n";
1743 if ($link['description']!='') echo '<DD>'.htmlspecialchars($link['description'])."\n";
1744 }
1745 }
1746 exit;
1747 }
1748
1749 // -------- User is uploading a file for import
1750 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=upload'))
1751 {
1752 // If file is too big, some form field may be missing.
1753 if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
1754 {
1755 $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
1756 echo '<script>alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.htmlspecialchars($returnurl).'\';</script>';
1757 exit;
1758 }
1759 if (!tokenOk($_POST['token'])) die('Wrong token.');
1760 importFile();
1761 exit;
1762 }
1763
1764 // -------- Show upload/import dialog:
1765 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=import'))
1766 {
1767 $PAGE = new pageBuilder;
1768 $PAGE->assign('linkcount',count($LINKSDB));
1769 $PAGE->assign('token',getToken());
1770 $PAGE->assign('maxfilesize',getMaxFileSize());
1771 $PAGE->renderPage('import');
1772 exit;
1773 }
1774
1775 // -------- Otherwise, simply display search form and links:
1776 $PAGE = new pageBuilder;
1777 $PAGE->assign('linkcount',count($LINKSDB));
1778 buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
1779 $PAGE->renderPage('linklist');
1780 exit;
1781 }
1782
1783 // -----------------------------------------------------------------------------------------------
1784 // Process the import file form.
1785 function importFile()
1786 {
1787 if (!(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'])) { die('Not allowed.'); }
1788 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
1789 $filename=$_FILES['filetoupload']['name'];
1790 $filesize=$_FILES['filetoupload']['size'];
1791 $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
1792 $private = (empty($_POST['private']) ? 0 : 1); // Should the links be imported as private?
1793 $overwrite = !empty($_POST['overwrite']) ; // Should the imported links overwrite existing ones?
1794 $import_count=0;
1795
1796 // Sniff file type:
1797 $type='unknown';
1798 if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
1799
1800 // Then import the bookmarks.
1801 if ($type=='netscape')
1802 {
1803 // This is a standard Netscape-style bookmark file.
1804 // This format is supported by all browsers (except IE, of course), also Delicious, Diigo and others.
1805 foreach(explode('<DT>',$data) as $html) // explode is very fast
1806 {
1807 $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);
1808 $d = explode('<DD>',$html);
1809 if (startswith($d[0],'<A '))
1810 {
1811 $link['description'] = (isset($d[1]) ? html_entity_decode(trim($d[1]),ENT_QUOTES,'UTF-8') : ''); // Get description (optional)
1812 preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : ''); // Get title
1813 $link['title'] = html_entity_decode($link['title'],ENT_QUOTES,'UTF-8');
1814 preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER); // Get all other attributes
1815 $raw_add_date=0;
1816 foreach($matches as $m)
1817 {
1818 $attr=$m[1]; $value=$m[2];
1819 if ($attr=='HREF') $link['url']=html_entity_decode($value,ENT_QUOTES,'UTF-8');
1820 elseif ($attr=='ADD_DATE')
1821 {
1822 $raw_add_date=intval($value);
1823 if ($raw_add_date>30000000000) $raw_add_date/=1000; //If larger than year 2920, then was likely stored in milliseconds instead of seconds
1824 }
1825 elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
1826 elseif ($attr=='TAGS') $link['tags']=html_entity_decode(str_replace(',',' ',$value),ENT_QUOTES,'UTF-8');
1827 }
1828 if ($link['url']!='')
1829 {
1830 if ($private==1) $link['private']=1;
1831 $dblink = $LINKSDB->getLinkFromUrl($link['url']); // See if the link is already in database.
1832 if ($dblink==false)
1833 { // Link not in database, let's import it...
1834 if (empty($raw_add_date)) $raw_add_date=time(); // In case of shitty bookmark file with no ADD_DATE
1835
1836 // Make sure date/time is not already used by another link.
1837 // (Some bookmark files have several different links with the same ADD_DATE)
1838 // We increment date by 1 second until we find a date which is not used in DB.
1839 // (so that links that have the same date/time are more or less kept grouped by date, but do not conflict.)
1840 while (!empty($LINKSDB[date('Ymd_His',$raw_add_date)])) { $raw_add_date++; }// Yes, I know it's ugly.
1841 $link['linkdate']=date('Ymd_His',$raw_add_date);
1842 $LINKSDB[$link['linkdate']] = $link;
1843 $import_count++;
1844 }
1845 else // Link already present in database.
1846 {
1847 if ($overwrite)
1848 { // If overwrite is required, we import link data, except date/time.
1849 $link['linkdate']=$dblink['linkdate'];
1850 $LINKSDB[$link['linkdate']] = $link;
1851 $import_count++;
1852 }
1853 }
1854
1855 }
1856 }
1857 }
1858 $LINKSDB->savedb();
1859
1860 echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) was successfully processed: '.$import_count.' links imported.");document.location=\'?\';</script>';
1861 }
1862 else
1863 {
1864 echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
1865 }
1866 }
1867
1868 // -----------------------------------------------------------------------------------------------
1869 // Template for the list of links (<div id="linklist">)
1870 // This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
1871 function buildLinkList($PAGE,$LINKSDB)
1872 {
1873 // ---- Filter link database according to parameters
1874 $linksToDisplay=array();
1875 $search_type='';
1876 $search_crits='';
1877 if (isset($_GET['searchterm'])) // Fulltext search
1878 {
1879 $linksToDisplay = $LINKSDB->filterFulltext(trim($_GET['searchterm']));
1880 $search_crits=htmlspecialchars(trim($_GET['searchterm']));
1881 $search_type='fulltext';
1882 }
1883 elseif (isset($_GET['searchtags'])) // Search by tag
1884 {
1885 $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
1886 $search_crits=explode(' ',trim($_GET['searchtags']));
1887 $search_type='tags';
1888 }
1889 elseif (isset($_SERVER['QUERY_STRING']) && preg_match('/[a-zA-Z0-9-_@]{6}(&.+?)?/',$_SERVER['QUERY_STRING'])) // Detect smallHashes in URL
1890 {
1891 $linksToDisplay = $LINKSDB->filterSmallHash(substr(trim($_SERVER["QUERY_STRING"], '/'),0,6));
1892 if (count($linksToDisplay)==0)
1893 {
1894 header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
1895 echo '<h1>404 Not found.</h1>Oh crap. The link you are trying to reach does not exist or has been deleted.';
1896 echo '<br>You would mind <a href="?">clicking here</a>?';
1897 exit;
1898 }
1899 $search_type='permalink';
1900 }
1901 else
1902 $linksToDisplay = $LINKSDB; // Otherwise, display without filtering.
1903
1904 // Option: Show only private links
1905 if (!empty($_SESSION['privateonly']))
1906 {
1907 $tmp = array();
1908 foreach($linksToDisplay as $linkdate=>$link)
1909 {
1910 if ($link['private']!=0) $tmp[$linkdate]=$link;
1911 }
1912 $linksToDisplay=$tmp;
1913 }
1914
1915 // ---- Handle paging.
1916 /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess???
1917 "Warning: array_keys() expects parameter 1 to be array, object given in ... "
1918 If my class implements ArrayAccess, why won't array_keys() accept it ? ( $keys=array_keys($linksToDisplay); )
1919 */
1920 $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks PHP.
1921
1922 // If there is only a single link, we change on-the-fly the title of the page.
1923 if (count($linksToDisplay)==1) $GLOBALS['pagetitle'] = $linksToDisplay[$keys[0]]['title'].' - '.$GLOBALS['title'];
1924
1925 // Select articles according to paging.
1926 $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']);
1927 $pagecount = ($pagecount==0 ? 1 : $pagecount);
1928 $page=( empty($_GET['page']) ? 1 : intval($_GET['page']));
1929 $page = ( $page<1 ? 1 : $page );
1930 $page = ( $page>$pagecount ? $pagecount : $page );
1931 $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index.
1932 $end = $i+$_SESSION['LINKS_PER_PAGE'];
1933 $linkDisp=array(); // Links to display
1934 while ($i<$end && $i<count($keys))
1935 {
1936 $link = $linksToDisplay[$keys[$i]];
1937 $link['description']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))));
1938 $title=$link['title'];
1939 $classLi = $i%2!=0 ? '' : 'publicLinkHightLight';
1940 $link['class'] = ($link['private']==0 ? $classLi : 'private');
1941 $link['localdate']=linkdate2locale($link['linkdate']);
1942 $taglist = explode(' ',$link['tags']);
1943 uasort($taglist, 'strcasecmp');
1944 $link['taglist']=$taglist;
1945 $linkDisp[$keys[$i]] = $link;
1946 $i++;
1947 }
1948
1949 // Compute paging navigation
1950 $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
1951 $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
1952 $paging='';
1953 $previous_page_url=''; if ($i!=count($keys)) $previous_page_url='?page='.($page+1).$searchterm.$searchtags;
1954 $next_page_url='';if ($page>1) $next_page_url='?page='.($page-1).$searchterm.$searchtags;
1955
1956 $token = ''; if (isLoggedIn()) $token=getToken();
1957
1958 // Fill all template fields.
1959 $PAGE->assign('linkcount',count($LINKSDB));
1960 $PAGE->assign('previous_page_url',$previous_page_url);
1961 $PAGE->assign('next_page_url',$next_page_url);
1962 $PAGE->assign('page_current',$page);
1963 $PAGE->assign('page_max',$pagecount);
1964 $PAGE->assign('result_count',count($linksToDisplay));
1965 $PAGE->assign('search_type',$search_type);
1966 $PAGE->assign('search_crits',$search_crits);
1967 $PAGE->assign('redirector',empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector']); // Optional redirector URL.
1968 $PAGE->assign('token',$token);
1969 $PAGE->assign('links',$linkDisp);
1970 return;
1971 }
1972
1973 // Compute the thumbnail for a link.
1974 //
1975 // With a link to the original URL.
1976 // Understands various services (youtube.com...)
1977 // Input: $url = URL for which the thumbnail must be found.
1978 // $href = if provided, this URL will be followed instead of $url
1979 // Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
1980 // Some of them may be missing.
1981 // Return an empty array if no thumbnail available.
1982 function computeThumbnail($url,$href=false)
1983 {
1984 if (!$GLOBALS['config']['ENABLE_THUMBNAILS']) return array();
1985 if ($href==false) $href=$url;
1986
1987 // For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
1988 // (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
1989 // ^^^^^^^^^^^ ^^^^^^^^^^^
1990 $domain = parse_url($url,PHP_URL_HOST);
1991 if ($domain=='youtube.com' || $domain=='www.youtube.com')
1992 {
1993 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
1994 if (!empty($params['v'])) return array('src'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
1995 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
1996 }
1997 if ($domain=='youtu.be') // Youtube short links
1998 {
1999 $path = parse_url($url,PHP_URL_PATH);
2000 return array('src'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
2001 'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
2002 }
2003 if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
2004 {
2005 parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
2006 if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
2007 'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
2008 }
2009
2010 if ($domain=='imgur.com')
2011 {
2012 $path = parse_url($url,PHP_URL_PATH);
2013 if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
2014 if (startsWith($path,'/r/')) return array('src'=>'https://i.imgur.com/'.basename($path).'s.jpg',
2015 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
2016 if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
2017 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
2018
2019 if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
2020 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
2021 }
2022 if ($domain=='i.imgur.com')
2023 {
2024 $pi = pathinfo(parse_url($url,PHP_URL_PATH));
2025 if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
2026 'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
2027 }
2028 if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
2029 {
2030 if (strpos($url,'dailymotion.com/video/')!==false)
2031 {
2032 $thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
2033 return array('src'=>$thumburl,
2034 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
2035 }
2036 }
2037 if (endsWith($domain,'.imageshack.us'))
2038 {
2039 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
2040 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
2041 {
2042 $thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
2043 return array('src'=>$thumburl,
2044 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
2045 }
2046 }
2047
2048 // Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
2049 // So we deport the thumbnail generation in order not to slow down page generation
2050 // (and we also cache the thumbnail)
2051
2052 if (!$GLOBALS['config']['ENABLE_LOCALCACHE']) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
2053
2054 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
2055 || $domain=='vimeo.com'
2056 || $domain=='ted.com' || endsWith($domain,'.ted.com')
2057 || $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
2058 )
2059 {
2060 if ($domain=='vimeo.com')
2061 { // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
2062 $path = parse_url($url,PHP_URL_PATH);
2063 if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
2064 }
2065 if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2066 { // Make sure this URL points to a single comic (/xxx... where xxx is numeric)
2067 $path = parse_url($url,PHP_URL_PATH);
2068 if (!preg_match('!/\d+.+?!',$path)) return array();
2069 }
2070 if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2071 { // Make sure this TED URL points to a video (/talks/...)
2072 $path = parse_url($url,PHP_URL_PATH);
2073 if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
2074 }
2075 $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
2076 return array('src'=>indexUrl().'?do=genthumbnail&hmac='.htmlspecialchars($sign).'&url='.urlencode($url),
2077 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
2078 }
2079
2080 // For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
2081 // Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
2082 // But using the extension will do.
2083 $ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
2084 if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
2085 {
2086 $sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
2087 return array('src'=>indexUrl().'?do=genthumbnail&hmac='.htmlspecialchars($sign).'&url='.urlencode($url),
2088 'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
2089 }
2090 return array(); // No thumbnail.
2091
2092 }
2093
2094
2095 // Returns the HTML code to display a thumbnail for a link
2096 // with a link to the original URL.
2097 // Understands various services (youtube.com...)
2098 // Input: $url = URL for which the thumbnail must be found.
2099 // $href = if provided, this URL will be followed instead of $url
2100 // Returns '' if no thumbnail available.
2101 function thumbnail($url,$href=false)
2102 {
2103 $t = computeThumbnail($url,$href);
2104 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
2105
2106 $html='<a href="'.htmlspecialchars($t['href']).'"><img src="'.htmlspecialchars($t['src']).'"';
2107 if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
2108 if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
2109 if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
2110 if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
2111 $html.='></a>';
2112 return $html;
2113 }
2114
2115 // Returns the HTML code to display a thumbnail for a link
2116 // for the picture wall (using lazy image loading)
2117 // Understands various services (youtube.com...)
2118 // Input: $url = URL for which the thumbnail must be found.
2119 // $href = if provided, this URL will be followed instead of $url
2120 // Returns '' if no thumbnail available.
2121 function lazyThumbnail($url,$href=false)
2122 {
2123 $t = computeThumbnail($url,$href);
2124 if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
2125
2126 $html='<a href="'.htmlspecialchars($t['href']).'">';
2127
2128 // Lazy image (only loaded by JavaScript when in the viewport).
2129 if (!empty($GLOBALS['disablejquery'])) // (except if jQuery is disabled)
2130 $html.='<img class="lazyimage" src="'.htmlspecialchars($t['src']).'"';
2131 else
2132 $html.='<img class="lazyimage" src="#" data-original="'.htmlspecialchars($t['src']).'"';
2133
2134 if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
2135 if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
2136 if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
2137 if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
2138 $html.='>';
2139
2140 // No-JavaScript fallback.
2141 $html.='<noscript><img src="'.htmlspecialchars($t['src']).'"';
2142 if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
2143 if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
2144 if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
2145 if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
2146 $html.='></noscript></a>';
2147
2148 return $html;
2149 }
2150
2151
2152 // -----------------------------------------------------------------------------------------------
2153 // Installation
2154 // This function should NEVER be called if the file data/config.php exists.
2155 function install()
2156 {
2157 // On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
2158 if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
2159
2160
2161 // This part makes sure sessions works correctly.
2162 // (Because on some hosts, session.save_path may not be set correctly,
2163 // or we may not have write access to it.)
2164 if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
2165 { // Step 2: Check if data in session is correct.
2166 echo '<pre>Sessions do not seem to work correctly on your server.<br>';
2167 echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
2168 echo 'It currently points to '.session_save_path().'<br>';
2169 echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
2170 echo '<br><a href="?">Click to try again.</a></pre>';
2171 die;
2172 }
2173 if (!isset($_SESSION['session_tested']))
2174 { // Step 1 : Try to store data in session and reload page.
2175 $_SESSION['session_tested'] = 'Working'; // Try to set a variable in session.
2176 header('Location: '.indexUrl().'?test_session'); // Redirect to check stored data.
2177 }
2178 if (isset($_GET['test_session']))
2179 { // Step 3: Sessions are OK. Remove test parameter from URL.
2180 header('Location: '.indexUrl());
2181 }
2182
2183
2184 if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
2185 {
2186 $tz = 'UTC';
2187 if (!empty($_POST['continent']) && !empty($_POST['city']))
2188 if (isTZvalid($_POST['continent'],$_POST['city']))
2189 $tz = $_POST['continent'].'/'.$_POST['city'];
2190 $GLOBALS['timezone'] = $tz;
2191 // Everything is ok, let's create config file.
2192 $GLOBALS['login'] = $_POST['setlogin'];
2193 $GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
2194 $GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
2195 $GLOBALS['title'] = (empty($_POST['title']) ? 'Shared links on '.htmlspecialchars(indexUrl()) : $_POST['title'] );
2196 $GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
2197 writeConfig();
2198 echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
2199 exit;
2200 }
2201
2202 // Display config form:
2203 list($timezone_form,$timezone_js) = templateTZform();
2204 $timezone_html=''; if ($timezone_form!='') $timezone_html='<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
2205
2206 $PAGE = new pageBuilder;
2207 $PAGE->assign('timezone_html',$timezone_html);
2208 $PAGE->assign('timezone_js',$timezone_js);
2209 $PAGE->renderPage('install');
2210 exit;
2211 }
2212
2213 // Generates the timezone selection form and JavaScript.
2214 // Input: (optional) current timezone (can be 'UTC/UTC'). It will be pre-selected.
2215 // Output: array(html,js)
2216 // Example: list($htmlform,$js) = templateTZform('Europe/Paris'); // Europe/Paris pre-selected.
2217 // Returns array('','') if server does not support timezones list. (e.g. PHP 5.1 on free.fr)
2218 function templateTZform($ptz=false)
2219 {
2220 if (function_exists('timezone_identifiers_list')) // because of old PHP version (5.1) which can be found on free.fr
2221 {
2222 // Try to split the provided timezone.
2223 if ($ptz==false) { $l=timezone_identifiers_list(); $ptz=$l[0]; }
2224 $spos=strpos($ptz,'/'); $pcontinent=substr($ptz,0,$spos); $pcity=substr($ptz,$spos+1);
2225
2226 // Display config form:
2227 $timezone_form = '';
2228 $timezone_js = '';
2229 // The list is in the form "Europe/Paris", "America/Argentina/Buenos_Aires"...
2230 // We split the list in continents/cities.
2231 $continents = array();
2232 $cities = array();
2233 foreach(timezone_identifiers_list() as $tz)
2234 {
2235 if ($tz=='UTC') $tz='UTC/UTC';
2236 $spos = strpos($tz,'/');
2237 if ($spos!==false)
2238 {
2239 $continent=substr($tz,0,$spos); $city=substr($tz,$spos+1);
2240 $continents[$continent]=1;
2241 if (!isset($cities[$continent])) $cities[$continent]='';
2242 $cities[$continent].='<option value="'.$city.'"'.($pcity==$city?' selected':'').'>'.$city.'</option>';
2243 }
2244 }
2245 $continents_html = '';
2246 $continents = array_keys($continents);
2247 foreach($continents as $continent)
2248 $continents_html.='<option value="'.$continent.'"'.($pcontinent==$continent?' selected':'').'>'.$continent.'</option>';
2249 $cities_html = $cities[$pcontinent];
2250 $timezone_form = "Continent: <select name=\"continent\" id=\"continent\" onChange=\"onChangecontinent();\">${continents_html}</select>";
2251 $timezone_form .= "&nbsp;&nbsp;&nbsp;&nbsp;City: <select name=\"city\" id=\"city\">${cities[$pcontinent]}</select><br />";
2252 $timezone_js = "<script>";
2253 $timezone_js .= "function onChangecontinent(){document.getElementById(\"city\").innerHTML = citiescontinent[document.getElementById(\"continent\").value];}";
2254 $timezone_js .= "var citiescontinent = ".json_encode($cities).";" ;
2255 $timezone_js .= "</script>" ;
2256 return array($timezone_form,$timezone_js);
2257 }
2258 return array('','');
2259 }
2260
2261 // Tells if a timezone is valid or not.
2262 // If not valid, returns false.
2263 // If system does not support timezone list, returns false.
2264 function isTZvalid($continent,$city)
2265 {
2266 $tz = $continent.'/'.$city;
2267 if (function_exists('timezone_identifiers_list')) // because of old PHP version (5.1) which can be found on free.fr
2268 {
2269 if (in_array($tz, timezone_identifiers_list())) // it's a valid timezone?
2270 return true;
2271 }
2272 return false;
2273 }
2274 if (!function_exists('json_encode')) {
2275 function json_encode($data) {
2276 switch ($type = gettype($data)) {
2277 case 'NULL':
2278 return 'null';
2279 case 'boolean':
2280 return ($data ? 'true' : 'false');
2281 case 'integer':
2282 case 'double':
2283 case 'float':
2284 return $data;
2285 case 'string':
2286 return '"' . addslashes($data) . '"';
2287 case 'object':
2288 $data = get_object_vars($data);
2289 case 'array':
2290 $output_index_count = 0;
2291 $output_indexed = array();
2292 $output_associative = array();
2293 foreach ($data as $key => $value) {
2294 $output_indexed[] = json_encode($value);
2295 $output_associative[] = json_encode($key) . ':' . json_encode($value);
2296 if ($output_index_count !== NULL && $output_index_count++ !== $key) {
2297 $output_index_count = NULL;
2298 }
2299 }
2300 if ($output_index_count !== NULL) {
2301 return '[' . implode(',', $output_indexed) . ']';
2302 } else {
2303 return '{' . implode(',', $output_associative) . '}';
2304 }
2305 default:
2306 return ''; // Not supported
2307 }
2308 }
2309 }
2310
2311 // Webservices (for use with jQuery/jQueryUI)
2312 // e.g. index.php?ws=tags&term=minecr
2313 function processWS()
2314 {
2315 if (empty($_GET['ws']) || empty($_GET['term'])) return;
2316 $term = $_GET['term'];
2317 $LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
2318 header('Content-Type: application/json; charset=utf-8');
2319
2320 // Search in tags (case insensitive, cumulative search)
2321 if ($_GET['ws']=='tags')
2322 {
2323 $tags=explode(' ',str_replace(',',' ',$term)); $last = array_pop($tags); // Get the last term ("a b c d" ==> "a b c", "d")
2324 $addtags=''; if ($tags) $addtags=implode(' ',$tags).' '; // We will pre-pend previous tags
2325 $suggested=array();
2326 /* To speed up things, we store list of tags in session */
2327 if (empty($_SESSION['tags'])) $_SESSION['tags'] = $LINKSDB->allTags();
2328 foreach($_SESSION['tags'] as $key=>$value)
2329 {
2330 if (startsWith($key,$last,$case=false) && !in_array($key,$tags)) $suggested[$addtags.$key.' ']=0;
2331 }
2332 echo json_encode(array_keys($suggested));
2333 exit;
2334 }
2335
2336 // Search a single tag (case sensitive, single tag search)
2337 if ($_GET['ws']=='singletag')
2338 {
2339 /* To speed up things, we store list of tags in session */
2340 if (empty($_SESSION['tags'])) $_SESSION['tags'] = $LINKSDB->allTags();
2341 foreach($_SESSION['tags'] as $key=>$value)
2342 {
2343 if (startsWith($key,$term,$case=true)) $suggested[$key]=0;
2344 }
2345 echo json_encode(array_keys($suggested));
2346 exit;
2347 }
2348 }
2349
2350 // Re-write configuration file according to globals.
2351 // Requires some $GLOBALS to be set (login,hash,salt,title).
2352 // If the config file cannot be saved, an error message is displayed and the user is redirected to "Tools" menu.
2353 // (otherwise, the function simply returns.)
2354 function writeConfig()
2355 {
2356 if (is_file($GLOBALS['config']['CONFIG_FILE']) && !isLoggedIn()) die('You are not authorized to alter config.'); // Only logged in user can alter config.
2357 $config='<?php $GLOBALS[\'login\']='.var_export($GLOBALS['login'],true).'; $GLOBALS[\'hash\']='.var_export($GLOBALS['hash'],true).'; $GLOBALS[\'salt\']='.var_export($GLOBALS['salt'],true).'; ';
2358 $config .='$GLOBALS[\'timezone\']='.var_export($GLOBALS['timezone'],true).'; date_default_timezone_set('.var_export($GLOBALS['timezone'],true).'); $GLOBALS[\'title\']='.var_export($GLOBALS['title'],true).';';
2359 $config .= '$GLOBALS[\'titleLink\']='.var_export($GLOBALS['titleLink'],true).'; ';
2360 $config .= '$GLOBALS[\'redirector\']='.var_export($GLOBALS['redirector'],true).'; ';
2361 $config .= '$GLOBALS[\'disablesessionprotection\']='.var_export($GLOBALS['disablesessionprotection'],true).'; ';
2362 $config .= '$GLOBALS[\'disablejquery\']='.var_export($GLOBALS['disablejquery'],true).'; ';
2363 $config .= '$GLOBALS[\'privateLinkByDefault\']='.var_export($GLOBALS['privateLinkByDefault'],true).'; ';
2364 $config .= '$GLOBALS[\'config\'][\'ENABLE_RSS_PERMALINKS\']='.var_export($GLOBALS['config']['ENABLE_RSS_PERMALINKS'], true).'; ';
2365 $config .= '$GLOBALS[\'config\'][\'ENABLE_UPDATECHECK\']='.var_export($GLOBALS['config']['ENABLE_UPDATECHECK'], true).'; ';
2366 $config .= ' ?>';
2367 if (!file_put_contents($GLOBALS['config']['CONFIG_FILE'],$config) || strcmp(file_get_contents($GLOBALS['config']['CONFIG_FILE']),$config)!=0)
2368 {
2369 echo '<script>alert("Shaarli could not create the config file. Please make sure Shaarli has the right to write in the folder is it installed in.");document.location=\'?\';</script>';
2370 exit;
2371 }
2372 }
2373
2374 /* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
2375 I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
2376 The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
2377 This function is called by passing the URL:
2378 http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
2379 [URL] is the URL of the link (e.g. a flickr page)
2380 [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
2381 The function below will fetch the image from the webservice and store it in the cache.
2382 */
2383 function genThumbnail()
2384 {
2385 // Make sure the parameters in the URL were generated by us.
2386 $sign = hash_hmac('sha256', $_GET['url'], $GLOBALS['salt']);
2387 if ($sign!=$_GET['hmac']) die('Naughty boy!');
2388
2389 // Let's see if we don't already have the image for this URL in the cache.
2390 $thumbname=hash('sha1',$_GET['url']).'.jpg';
2391 if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$thumbname))
2392 { // We have the thumbnail, just serve it:
2393 header('Content-Type: image/jpeg');
2394 echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname);
2395 return;
2396 }
2397 // We may also serve a blank image (if service did not respond)
2398 $blankname=hash('sha1',$_GET['url']).'.gif';
2399 if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$blankname))
2400 {
2401 header('Content-Type: image/gif');
2402 echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname);
2403 return;
2404 }
2405
2406 // Otherwise, generate the thumbnail.
2407 $url = $_GET['url'];
2408 $domain = parse_url($url,PHP_URL_HOST);
2409
2410 if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
2411 {
2412 // Crude replacement to handle new flickr domain policy (They prefer www. now)
2413 $url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
2414
2415 // Is this a link to an image, or to a flickr page ?
2416 $imageurl='';
2417 if (endswith(parse_url($url,PHP_URL_PATH),'.jpg'))
2418 { // This is a direct link to an image. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
2419 preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
2420 if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
2421 }
2422 else // This is a flickr page (html)
2423 {
2424 list($httpstatus,$headers,$data) = getHTTP($url,20); // Get the flickr html page.
2425 if (strpos($httpstatus,'200 OK')!==false)
2426 {
2427 // flickr now nicely provides the URL of the thumbnail in each flickr page.
2428 preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!',$data,$matches);
2429 if (!empty($matches[1])) $imageurl=$matches[1];
2430
2431 // In albums (and some other pages), the link rel="image_src" is not provided,
2432 // but flickr provides:
2433 // <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
2434 if ($imageurl=='')
2435 {
2436 preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!',$data,$matches);
2437 if (!empty($matches[1])) $imageurl=$matches[1];
2438 }
2439 }
2440 }
2441
2442 if ($imageurl!='')
2443 { // Let's download the image.
2444 list($httpstatus,$headers,$data) = getHTTP($imageurl,10); // Image is 240x120, so 10 seconds to download should be enough.
2445 if (strpos($httpstatus,'200 OK')!==false)
2446 {
2447 file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache.
2448 header('Content-Type: image/jpeg');
2449 echo $data;
2450 return;
2451 }
2452 }
2453 }
2454
2455 elseif ($domain=='vimeo.com' )
2456 {
2457 // This is more complex: we have to perform a HTTP request, then parse the result.
2458 // Maybe we should deport this to JavaScript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
2459 $vid = substr(parse_url($url,PHP_URL_PATH),1);
2460 list($httpstatus,$headers,$data) = getHTTP('https://vimeo.com/api/v2/video/'.htmlspecialchars($vid).'.php',5);
2461 if (strpos($httpstatus,'200 OK')!==false)
2462 {
2463 $t = unserialize($data);
2464 $imageurl = $t[0]['thumbnail_medium'];
2465 // Then we download the image and serve it to our client.
2466 list($httpstatus,$headers,$data) = getHTTP($imageurl,10);
2467 if (strpos($httpstatus,'200 OK')!==false)
2468 {
2469 file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache.
2470 header('Content-Type: image/jpeg');
2471 echo $data;
2472 return;
2473 }
2474 }
2475 }
2476
2477 elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
2478 {
2479 // The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
2480 // http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
2481 // <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
2482 list($httpstatus,$headers,$data) = getHTTP($url,5);
2483 if (strpos($httpstatus,'200 OK')!==false)
2484 {
2485 // Extract the link to the thumbnail
2486 preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!',$data,$matches);
2487 if (!empty($matches[1]))
2488 { // Let's download the image.
2489 $imageurl=$matches[1];
2490 list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough.
2491 if (strpos($httpstatus,'200 OK')!==false)
2492 {
2493 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2494 file_put_contents($filepath,$data); // Save image to cache.
2495 if (resizeImage($filepath))
2496 {
2497 header('Content-Type: image/jpeg');
2498 echo file_get_contents($filepath);
2499 return;
2500 }
2501 }
2502 }
2503 }
2504 }
2505
2506 elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
2507 {
2508 // There is no thumbnail available for xkcd comics, so download the whole image and resize it.
2509 // http://xkcd.com/327/
2510 // <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
2511 list($httpstatus,$headers,$data) = getHTTP($url,5);
2512 if (strpos($httpstatus,'200 OK')!==false)
2513 {
2514 // Extract the link to the thumbnail
2515 preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!',$data,$matches);
2516 if (!empty($matches[1]))
2517 { // Let's download the image.
2518 $imageurl=$matches[1];
2519 list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough.
2520 if (strpos($httpstatus,'200 OK')!==false)
2521 {
2522 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2523 file_put_contents($filepath,$data); // Save image to cache.
2524 if (resizeImage($filepath))
2525 {
2526 header('Content-Type: image/jpeg');
2527 echo file_get_contents($filepath);
2528 return;
2529 }
2530 }
2531 }
2532 }
2533 }
2534
2535 else
2536 {
2537 // For all other domains, we try to download the image and make a thumbnail.
2538 list($httpstatus,$headers,$data) = getHTTP($url,30); // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
2539 if (strpos($httpstatus,'200 OK')!==false)
2540 {
2541 $filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
2542 file_put_contents($filepath,$data); // Save image to cache.
2543 if (resizeImage($filepath))
2544 {
2545 header('Content-Type: image/jpeg');
2546 echo file_get_contents($filepath);
2547 return;
2548 }
2549 }
2550 }
2551
2552
2553 // Otherwise, return an empty image (8x8 transparent gif)
2554 $blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
2555 file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname,$blankgif); // Also put something in cache so that this URL is not requested twice.
2556 header('Content-Type: image/gif');
2557 echo $blankgif;
2558 }
2559
2560 // Make a thumbnail of the image (to width: 120 pixels)
2561 // Returns true if success, false otherwise.
2562 function resizeImage($filepath)
2563 {
2564 if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
2565
2566 // Trick: some stupid people rename GIF as JPEG... or else.
2567 // So we really try to open each image type whatever the extension is.
2568 $header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
2569 $im=false;
2570 $i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
2571 $i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
2572 $i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
2573 if (!$im) return false; // Unable to open image (corrupted or not an image)
2574 $w = imagesx($im);
2575 $h = imagesy($im);
2576 $ystart = 0; $yheight=$h;
2577 if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
2578 $nw = 120; // Desired width
2579 $nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
2580 // Resize image:
2581 $im2 = imagecreatetruecolor($nw,$nh);
2582 imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
2583 imageinterlace($im2,true); // For progressive JPEG.
2584 $tempname=$filepath.'_TEMP.jpg';
2585 imagejpeg($im2, $tempname, 90);
2586 imagedestroy($im);
2587 imagedestroy($im2);
2588 unlink($filepath);
2589 rename($tempname,$filepath); // Overwrite original picture with thumbnail.
2590 return true;
2591 }
2592
2593 // Invalidate caches when the database is changed or the user logs out.
2594 // (e.g. tags cache).
2595 function invalidateCaches()
2596 {
2597 unset($_SESSION['tags']); // Purge cache attached to session.
2598 pageCache::purgeCache(); // Purge page cache shared by sessions.
2599 }
2600
2601 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=genthumbnail')) { genThumbnail(); exit; } // Thumbnail generation/cache does not need the link database.
2602 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
2603 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=atom')) { showATOM(); exit; }
2604 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=dailyrss')) { showDailyRSS(); exit; }
2605 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=daily')) { showDaily(); exit; }
2606 if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'ws=')) { processWS(); exit; } // Webservices (for jQuery/jQueryUI)
2607 if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=$GLOBALS['config']['LINKS_PER_PAGE'];
2608 renderPage();
2609 ?>