/
index.php
2491 lines (2267 loc) · 118 KB
/
index.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
// Shaarli 0.0.41 beta - Shaare your links...
// The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net
// http://sebsauvage.net/wiki/doku.php?id=php:shaarli
// Licence: http://www.opensource.org/licenses/zlib-license.php
// Requires: php 5.1.x (but autocomplete fields will only work if you have php 5.2.x)
// -----------------------------------------------------------------------------------------------
// NEVER TRUST IN PHP.INI
// Some hosts do not define a default timezone in php.ini,
// so we have to do this for avoid the strict standard error.
date_default_timezone_set('UTC');
// -----------------------------------------------------------------------------------------------
// Hardcoded parameter (These parameters can be overwritten by creating the file /config/options.php)
$GLOBALS['config']['DATADIR'] = 'data'; // Data subdirectory
$GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php'; // Configuration file (user login/password)
$GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php'; // Data storage file.
$GLOBALS['config']['LINKS_PER_PAGE'] = 20; // Default links per page.
$GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php'; // File storage for failures and bans.
$GLOBALS['config']['BAN_AFTER'] = 4; // Ban IP after this many failures.
$GLOBALS['config']['BAN_DURATION'] = 1800; // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes)
$GLOBALS['config']['OPEN_SHAARLI'] = false; // If true, anyone can add/edit/delete links without having to login
$GLOBALS['config']['HIDE_TIMESTAMPS'] = false; // If true, the moment when links were saved are not shown to users that are not logged in.
$GLOBALS['config']['ENABLE_THUMBNAILS'] = true; // Enable thumbnails in links.
$GLOBALS['config']['CACHEDIR'] = 'cache'; // Cache directory for thumbnails for SLOW services (like flickr)
$GLOBALS['config']['PAGECACHE'] = 'pagecache'; // Page cache directory.
$GLOBALS['config']['ENABLE_LOCALCACHE'] = true; // Enable Shaarli to store thumbnail in a local cache. Disable to reduce webspace usage.
$GLOBALS['config']['PUBSUBHUB_URL'] = ''; // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
$GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt'; // For updates check of Shaarli.
$GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ; // Updates check frequency for Shaarli. 86400 seconds=24 hours
// Note: You must have publisher.php in the same directory as Shaarli index.php
// -----------------------------------------------------------------------------------------------
// You should not touch below (or at your own risks !)
// Optionnal config file.
if (is_file($GLOBALS['config']['DATADIR'].'/options.php')) require($GLOBALS['config']['DATADIR'].'/options.php');
define('shaarli_version','0.0.41 beta');
define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
// Force cookie path (but do not change lifetime)
$cookie=session_get_cookie_params();
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params($cookie['lifetime'],$cookiedir,$_SERVER['HTTP_HOST']); // Set default cookie expiration and path.
// Set session parameters on server side.
define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
ini_set('session.use_cookies', 1); // Use cookies to store session.
ini_set('session.use_only_cookies', 1); // Force cookies for session (phpsessionID forbidden in URL)
ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
session_name('shaarli');
if (session_id() == '') session_start(); // Start session if needed (Some server auto-start sessions).
// PHP Settings
ini_set('max_input_time','60'); // High execution time in case of problematic imports/exports.
ini_set('memory_limit', '128M'); // Try to set max upload file size and read (May not work on some hosts).
ini_set('post_max_size', '16M');
ini_set('upload_max_filesize', '16M');
checkphpversion();
error_reporting(E_ALL^E_WARNING); // See all error except warnings.
//error_reporting(-1); // See all errors (for debugging only)
include "inc/rain.tpl.class.php"; //include Rain TPL
raintpl::$tpl_dir = "tpl/"; // template directory
if (!is_dir('tmp')) { mkdir('tmp',0705); chmod('tmp',0705); }
raintpl::$cache_dir = "tmp/"; // cache directory
ob_start(); // Output buffering for the page cache.
// In case stupid admin has left magic_quotes enabled in php.ini:
if (get_magic_quotes_gpc())
{
function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
$_POST = array_map('stripslashes_deep', $_POST);
$_GET = array_map('stripslashes_deep', $_GET);
$_COOKIE = array_map('stripslashes_deep', $_COOKIE);
}
// Prevent caching on client side or proxy: (yes, it's ugly)
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
// Directories creations (Note that your web host may require differents rights than 705.)
if (!is_writable(realpath(dirname(__FILE__)))) die('<pre>ERROR: Shaarli does not have the right to write in its own directory ('.realpath(dirname(__FILE__)).').</pre>');
if (!is_dir($GLOBALS['config']['DATADIR'])) { mkdir($GLOBALS['config']['DATADIR'],0705); chmod($GLOBALS['config']['DATADIR'],0705); }
if (!is_dir('tmp')) { mkdir('tmp',0705); chmod('tmp',0705); } // For RainTPL temporary files.
if (!is_file($GLOBALS['config']['DATADIR'].'/.htaccess')) { file_put_contents($GLOBALS['config']['DATADIR'].'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
// Second check to see if Shaarli can write in its directory, because on some hosts is_writable() is not reliable.
if (!is_file($GLOBALS['config']['DATADIR'].'/.htaccess')) die('<pre>ERROR: Shaarli does not have the right to write in its data directory ('.realpath($GLOBALS['config']['DATADIR']).').</pre>');
if ($GLOBALS['config']['ENABLE_LOCALCACHE'])
{
if (!is_dir($GLOBALS['config']['CACHEDIR'])) { mkdir($GLOBALS['config']['CACHEDIR'],0705); chmod($GLOBALS['config']['CACHEDIR'],0705); }
if (!is_file($GLOBALS['config']['CACHEDIR'].'/.htaccess')) { file_put_contents($GLOBALS['config']['CACHEDIR'].'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
}
// Handling of old config file which do not have the new parameters.
if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.htmlspecialchars(indexUrl());
if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get();
if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']='';
if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false;
if (empty($GLOBALS['disablejquery'])) $GLOBALS['disablejquery']=false;
if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false;
// I really need to rewrite Shaarli with a proper configuation manager.
// Run config screen if first run:
if (!is_file($GLOBALS['config']['CONFIG_FILE'])) install();
require $GLOBALS['config']['CONFIG_FILE']; // Read login/password hash into $GLOBALS.
autoLocale(); // Sniff browser language and set date format accordingly.
header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
// Check php version
function checkphpversion()
{
if (version_compare(PHP_VERSION, '5.1.0') < 0)
{
header('Content-Type: text/plain; charset=utf-8');
echo 'Your server supports php '.PHP_VERSION.'. Shaarli requires at least php 5.1.0, and thus cannot run. Sorry.';
exit;
}
}
// Checks if an update is available for Shaarli.
// (at most once a day, and only for registered user.)
// Output: '' = no new version.
// other= the available version.
function checkUpdate()
{
if (!isLoggedIn()) return ''; // Do not check versions for visitors.
// Get latest version number at most once a day.
if (!is_file($GLOBALS['config']['UPDATECHECK_FILENAME']) || (filemtime($GLOBALS['config']['UPDATECHECK_FILENAME'])<time()-($GLOBALS['config']['UPDATECHECK_INTERVAL'])))
{
$version=shaarli_version;
list($httpstatus,$headers,$data) = getHTTP('http://sebsauvage.net/files/shaarli_version.txt',2);
if (strpos($httpstatus,'200 OK')!==false) $version=$data;
// If failed, nevermind. We don't want to bother the user with that.
file_put_contents($GLOBALS['config']['UPDATECHECK_FILENAME'],$version); // touch file date
}
// Compare versions:
$newestversion=file_get_contents($GLOBALS['config']['UPDATECHECK_FILENAME']);
if (version_compare($newestversion,shaarli_version)==1) return $newestversion;
return '';
}
// -----------------------------------------------------------------------------------------------
// Simple cache system (mainly for the RSS/ATOM feeds).
class pageCache
{
private $url; // Full URL of the page to cache (typically the value returned by pageUrl())
private $shouldBeCached; // boolean: Should this url be cached ?
private $filename; // Name of the cache file for this url
/*
$url = url (typically the value returned by pageUrl())
$shouldBeCached = boolean. If false, the cache will be disabled.
*/
public function __construct($url,$shouldBeCached)
{
$this->url = $url;
$this->filename = $GLOBALS['config']['PAGECACHE'].'/'.sha1($url).'.cache';
$this->shouldBeCached = $shouldBeCached;
}
// If the page should be cached and a cached version exists,
// returns the cached version (otherwise, return null).
public function cachedVersion()
{
if (!$this->shouldBeCached) return null;
if (is_file($this->filename)) { return file_get_contents($this->filename); exit; }
return null;
}
// Put a page in the cache.
public function cache($page)
{
if (!$this->shouldBeCached) return;
if (!is_dir($GLOBALS['config']['PAGECACHE'])) { mkdir($GLOBALS['config']['PAGECACHE'],0705); chmod($GLOBALS['config']['PAGECACHE'],0705); }
file_put_contents($this->filename,$page);
}
// Purge the whole cache.
// (call with pageCache::purgeCache())
public static function purgeCache()
{
if (is_dir($GLOBALS['config']['PAGECACHE']))
{
$handler = opendir($GLOBALS['config']['PAGECACHE']);
if ($handler!==false)
{
while (($filename = readdir($handler))!==false)
{
if (endsWith($filename,'.cache')) { unlink($GLOBALS['config']['PAGECACHE'].'/'.$filename); }
}
closedir($handler);
}
}
}
}
// -----------------------------------------------------------------------------------------------
// Log to text file
function logm($message)
{
$t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND);
}
// Same as nl2br(), but escapes < and >
function nl2br_escaped($html)
{
return str_replace('>','>',str_replace('<','<',nl2br($html)));
}
/* Returns the small hash of a string, using RFC 4648 base64url format
eg. smallHash('20111006_131924') --> yZH23w
Small hashes:
- are unique (well, as unique as crc32, at last)
- are always 6 characters long.
- only use the following characters: a-z A-Z 0-9 - _ @
- are NOT cryptographically secure (they CAN be forged)
In Shaarli, they are used as a tinyurl-like link to individual entries.
*/
function smallHash($text)
{
$t = rtrim(base64_encode(hash('crc32',$text,true)),'=');
return strtr($t, '+/', '-_');
}
// In a string, converts urls to clickable links.
// Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722
function text2clickable($url)
{
$redir = empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'];
return preg_replace('!(((?:https?|ftp|file)://|apt:|magnet:)\S+[[:alnum:]]/?)!si','<a href="'.$redir.'$1" rel="nofollow">$1</a>',$url);
}
// This function inserts where relevant so that multiple spaces are properly displayed in HTML
// even in the absence of <pre> (This is used in description to keep text formatting)
function keepMultipleSpaces($text)
{
return str_replace(' ',' ',$text);
}
// ------------------------------------------------------------------------------------------
// Sniff browser language to display dates in the right format automatically.
// (Note that is may not work on your server if the corresponding local is not installed.)
function autoLocale()
{
$loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
{ // (It's a bit crude, but it works very well. Prefered language is always presented first.)
if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
}
setlocale(LC_TIME,$loc); // LC_TIME = Set local for date/time format only.
}
// ------------------------------------------------------------------------------------------
// PubSubHubbub protocol support (if enabled) [UNTESTED]
// (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php';
function pubsubhub()
{
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
$p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']);
$topic_url = array (
indexUrl().'?do=atom',
indexUrl().'?do=rss'
);
$p->publish_update($topic_url);
}
}
// ------------------------------------------------------------------------------------------
// Session management
// Returns the IP address of the client (Used to prevent session cookie hijacking.)
function allIPs()
{
$ip = $_SERVER["REMOTE_ADDR"];
// Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
return $ip;
}
// Check that user/password is correct.
function check_auth($login,$password)
{
$hash = sha1($password.$login.$GLOBALS['salt']);
if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
{ // Login/password is correct.
$_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
$_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked.
$_SESSION['username']=$login;
$_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
logm('Login successful');
return True;
}
logm('Login failed for user '.$login);
return False;
}
// Returns true if the user is logged in.
function isLoggedIn()
{
if ($GLOBALS['config']['OPEN_SHAARLI']) return true;
if (!isset($GLOBALS['login'])) return false; // Shaarli is not configured yet.
// If session does not exist on server side, or IP address has changed, or session has expired, logout.
if (empty($_SESSION['uid']) || ($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) || time()>=$_SESSION['expires_on'])
{
logout();
return false;
}
if (!empty($_SESSION['longlastingsession'])) $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
else $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
return true;
}
// Force logout.
function logout() { if (isset($_SESSION)) { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']); unset($_SESSION['privateonly']); } }
// ------------------------------------------------------------------------------------------
// Brute force protection system
// Several consecutive failed logins will ban the IP address for 30 minutes.
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?>");
include $GLOBALS['config']['IPBANS_FILENAME'];
// Signal a failed login. Will ban the IP if too many failures:
function ban_loginFailed()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
$gb['FAILURES'][$ip]++;
if ($gb['FAILURES'][$ip]>($GLOBALS['config']['BAN_AFTER']-1))
{
$gb['BANS'][$ip]=time()+$GLOBALS['config']['BAN_DURATION'];
logm('IP address banned from login');
}
$GLOBALS['IPBANS'] = $gb;
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
}
// Signals a successful login. Resets failed login counter.
function ban_loginOk()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
$GLOBALS['IPBANS'] = $gb;
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
}
// Checks if the user CAN login. If 'true', the user can try to login.
function ban_canLogin()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
if (isset($gb['BANS'][$ip]))
{
// User is banned. Check if the ban has expired:
if ($gb['BANS'][$ip]<=time())
{ // Ban expired, user can try to login again.
logm('Ban lifted.');
unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
return true; // Ban has expired, user can login.
}
return false; // User is banned.
}
return true; // User is not banned.
}
// ------------------------------------------------------------------------------------------
// Process login form: Check if login/password is correct.
if (isset($_POST['login']))
{
if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
{ // Login/password is ok.
ban_loginOk();
// If user wants to keep the session cookie even after the browser closes:
if (!empty($_POST['longlastingsession']))
{
$_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
$_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['HTTP_HOST']); // Set session cookie expiration on client side
// Note: Never forget the trailing slash on the cookie path !
session_regenerate_id(true); // Send cookie with new expiration date to browser.
}
else // Standard session expiration (=when browser closes)
{
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params(0,$cookiedir,$_SERVER['HTTP_HOST']); // 0 means "When browser closes"
session_regenerate_id(true);
}
// Optional redirect after login:
if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
if (isset($_POST['returnurl']))
{
if (endsWith($_POST['returnurl'],'?do=login')) { header('Location: ?'); exit; } // Prevent loops over login screen.
header('Location: '.$_POST['returnurl']); exit;
}
header('Location: ?'); exit;
}
else
{
ban_loginFailed();
$redir = '';
if (isset($_GET['post'])) { $redir = '&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):''); }
echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
exit;
}
}
// ------------------------------------------------------------------------------------------
// Misc utility functions:
// Returns the server URL (including port and http/https), without path.
// eg. "http://myserver.com:8080"
// You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
function serverUrl()
{
$https = (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS'])=='on')) || $_SERVER["SERVER_PORT"]=='443'; // HTTPS detection.
$serverport = ($_SERVER["SERVER_PORT"]=='80' || ($https && $_SERVER["SERVER_PORT"]=='443') ? '' : ':'.$_SERVER["SERVER_PORT"]);
return 'http'.($https?'s':'').'://'.$_SERVER['HTTP_HOST'].$serverport;
}
// Returns the absolute URL of current script, without the query.
// (eg. http://sebsauvage.net/links/)
function indexUrl()
{
$scriptname = $_SERVER["SCRIPT_NAME"];
// If the script is named 'index.php', we remove it (for better looking URLs,
// eg. http://mysite.com/shaarli/?abcde instead of http://mysite.com/shaarli/index.php?abcde)
if (endswith($scriptname,'index.php')) $scriptname = substr($scriptname,0,strlen($scriptname)-9);
return serverUrl() . $scriptname;
}
// Returns the absolute URL of current script, WITH the query.
// (eg. http://sebsauvage.net/links/?toto=titi&spamspamspam=humbug)
function pageUrl()
{
return indexUrl().(!empty($_SERVER["QUERY_STRING"]) ? '?'.$_SERVER["QUERY_STRING"] : '');
}
// Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
function return_bytes($val)
{
$val = trim($val); $last=strtolower($val[strlen($val)-1]);
switch($last)
{
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}
// Try to determine max file size for uploads (POST).
// Returns an integer (in bytes)
function getMaxFileSize()
{
$size1 = return_bytes(ini_get('post_max_size'));
$size2 = return_bytes(ini_get('upload_max_filesize'));
// Return the smaller of two:
$maxsize = min($size1,$size2);
// FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
return $maxsize;
}
// Tells if a string start with a substring or not.
function startsWith($haystack,$needle,$case=true)
{
if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
}
// Tells if a string ends with a substring or not.
function endsWith($haystack,$needle,$case=true)
{
if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
(used to build the ADD_DATE attribute in Netscape-bookmarks file)
PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
function linkdate2timestamp($linkdate)
{
$Y=$M=$D=$h=$m=$s=0;
$r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
return mktime($h,$m,$s,$M,$D,$Y);
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
(used to build the pubDate attribute in RSS feed.) */
function linkdate2rfc822($linkdate)
{
return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a ISO 8601 date.
(used to build the updated tags in ATOM feed.) */
function linkdate2iso8601($linkdate)
{
return date('c',linkdate2timestamp($linkdate)); // 'c' is for ISO 8601 date format.
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
(used to display link date on screen)
The date format is automatically chosen according to locale/languages sniffed from browser headers (see autoLocale()). */
function linkdate2locale($linkdate)
{
return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
// Note that if you use a local which is not installed on your webserver,
// the date will not be displayed in the chosen locale, but probably in US notation.
}
// Parse HTTP response headers and return an associative array.
function http_parse_headers_shaarli( $headers )
{
$res=array();
foreach($headers as $header)
{
$i = strpos($header,': ');
if ($i!==false)
{
$key=substr($header,0,$i);
$value=substr($header,$i+2,strlen($header)-$i-2);
$res[$key]=$value;
}
}
return $res;
}
/* GET an URL.
Input: $url : url to get (http://...)
$timeout : Network timeout (will wait this many seconds for an anwser before giving up).
Output: An array. [0] = HTTP status message (eg. "HTTP/1.1 200 OK") or error message
[1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
[2] = data
Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
if (strpos($httpstatus,'200 OK')!==false)
echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
else
echo 'There was an error: '.htmlspecialchars($httpstatus)
*/
function getHTTP($url,$timeout=30)
{
try
{
$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
$context = stream_context_create($options);
$data=file_get_contents($url,false,$context,-1, 4000000); // We download at most 4 Mb from source.
if (!$data) { return array('HTTP Error',array(),''); }
$httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
$responseHeaders=http_parse_headers_shaarli($http_response_header);
return array($httpStatus,$responseHeaders,$data);
}
catch (Exception $e) // getHTTP *can* fail silentely (we don't care if the title cannot be fetched)
{
return array($e->getMessage(),'','');
}
}
// Extract title from an HTML document.
// (Returns an empty string if not found.)
function html_extract_title($html)
{
return preg_match('!<title>(.*?)</title>!is', $html, $matches) ? trim(str_replace("\n",' ', $matches[1])) : '' ;
}
// ------------------------------------------------------------------------------------------
// Token management for XSRF protection
// Token should be used in any form which acts on data (create,update,delete,import...).
if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
// Returns a token.
function getToken()
{
$rnd = sha1(uniqid('',true).'_'.mt_rand().$GLOBALS['salt']); // We generate a random string.
$_SESSION['tokens'][$rnd]=1; // Store it on the server side.
return $rnd;
}
// Tells if a token is ok. Using this function will destroy the token.
// true=token is ok.
function tokenOk($token)
{
if (isset($_SESSION['tokens'][$token]))
{
unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
return true; // Token is ok.
}
return false; // Wrong token, or already used.
}
// ------------------------------------------------------------------------------------------
/* This class is in charge of building the final page.
(This is basically a wrapper around RainTPL which pre-fills some fields.)
p = new pageBuilder;
p.assign('myfield','myvalue');
p.renderPage('mytemplate');
*/
class pageBuilder
{
private $tpl; // RainTPL template
function __construct()
{
$this->tpl=false;
}
private function initialize()
{
$this->tpl = new RainTPL;
$this->tpl->assign('newversion',checkUpdate());
$this->tpl->assign('feedurl',htmlspecialchars(indexUrl()));
$searchcrits=''; // Search criteria
if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']);
elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']);
$this->tpl->assign('searchcrits',$searchcrits);
$this->tpl->assign('source',indexUrl());
$this->tpl->assign('version',shaarli_version);
$this->tpl->assign('scripturl',indexUrl());
$this->tpl->assign('pagetitle','Shaarli');
$this->tpl->assign('privateonly',!empty($_SESSION['privateonly'])); // Show only private links ?
if (!empty($GLOBALS['title'])) $this->tpl->assign('pagetitle',$GLOBALS['title']);
if (!empty($GLOBALS['pagetitle'])) $this->tpl->assign('pagetitle',$GLOBALS['pagetitle']);
$this->tpl->assign('shaarlititle',empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title'] );
return;
}
// The following assign() method is basically the same as RainTPL (except that it's lazy)
public function assign($what,$where)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->assign($what,$where);
}
// Render a specific page (using a template).
// eg. pb.renderPage('picwall')
public function renderPage($page)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->draw($page);
}
}
// ------------------------------------------------------------------------------------------
/* Data storage for links.
This object behaves like an associative array.
Example:
$mylinks = new linkdb();
echo $mylinks['20110826_161819']['title'];
foreach($mylinks as $link)
echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
Available keys:
title : Title of the link
url : URL of the link. Can be absolute or relative. Relative URLs are permalinks (eg.'?m-ukcw')
description : description of the entry
private : Is this link private ? 0=no, other value=yes
linkdate : date of the creation of this entry, in the form YYYYMMDD_HHMMSS (eg.'20110914_192317')
tags : tags attached to this entry (separated by spaces)
We implement 3 interfaces:
- ArrayAccess so that this object behaves like an associative array.
- Iterator so that this object can be used in foreach() loops.
- Countable interface so that we can do a count() on this object.
*/
class linkdb implements Iterator, Countable, ArrayAccess
{
private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
private $urls; // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
private $keys; // List of linkdate keys (for the Iterator interface implementation)
private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
private $loggedin; // Is the used logged in ? (used to filter private links)
// Constructor:
function __construct($isLoggedIn)
// Input : $isLoggedIn : is the used logged in ?
{
$this->loggedin = $isLoggedIn;
$this->checkdb(); // Make sure data file exists.
$this->readdb(); // Then read it.
}
// ---- Countable interface implementation
public function count() { return count($this->links); }
// ---- ArrayAccess interface implementation
public function offsetSet($offset, $value)
{
if (!$this->loggedin) die('You are not authorized to add a link.');
if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
if (empty($offset)) die('You must specify a key.');
$this->links[$offset] = $value;
$this->urls[$value['url']]=$offset;
}
public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
public function offsetUnset($offset)
{
if (!$this->loggedin) die('You are not authorized to delete a link.');
$url = $this->links[$offset]['url']; unset($this->urls[$url]);
unset($this->links[$offset]);
}
public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
// ---- Iterator interface implementation
function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
function key() { return $this->keys[$this->position]; } // current key
function current() { return $this->links[$this->keys[$this->position]]; } // current value
function next() { ++$this->position; } // go to next item
function valid() { return isset($this->keys[$this->position]); } // Check if current position is valid.
// ---- Misc methods
private function checkdb() // Check if db directory and file exists.
{
if (!file_exists($GLOBALS['config']['DATASTORE'])) // Create a dummy database for example.
{
$this->links = array();
$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');
$this->links[$link['linkdate']] = $link;
$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');
$this->links[$link['linkdate']] = $link;
file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
}
}
// Read database from disk to memory
private function readdb()
{
// Read data
$this->links=(file_exists($GLOBALS['config']['DATASTORE']) ? unserialize(gzinflate(base64_decode(substr(file_get_contents($GLOBALS['config']['DATASTORE']),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
// Note that gzinflate is faster than gzuncompress. See: http://www.php.net/manual/en/function.gzdeflate.php#96439
// If user is not logged in, filter private links.
if (!$this->loggedin)
{
$toremove=array();
foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
}
// Keep the list of the mapping URLs-->linkdate up-to-date.
$this->urls=array();
foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
}
// Save database from memory to disk.
public function savedb()
{
if (!$this->loggedin) die('You are not authorized to change the database.');
file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
invalidateCaches();
}
// Returns the link for a given URL (if it exists). false it does not exist.
public function getLinkFromUrl($url)
{
if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
return false;
}
// Case insentitive search among links (in url, title and description). Returns filtered list of links.
// eg. print_r($mydb->filterFulltext('hollandais'));
public function filterFulltext($searchterms)
{
// FIXME: explode(' ',$searchterms) and perform a AND search.
// FIXME: accept double-quotes to search for a string "as is" ?
$filtered=array();
$s = strtolower($searchterms);
foreach($this->links as $l)
{
$found= (strpos(strtolower($l['title']),$s)!==false)
|| (strpos(strtolower($l['description']),$s)!==false)
|| (strpos(strtolower($l['url']),$s)!==false)
|| (strpos(strtolower($l['tags']),$s)!==false);
if ($found) $filtered[$l['linkdate']] = $l;
}
krsort($filtered);
return $filtered;
}
// Filter by tag.
// You can specify one or more tags (tags can be separated by space or comma).
// eg. print_r($mydb->filterTags('linux programming'));
public function filterTags($tags,$casesensitive=false)
{
$t = str_replace(',',' ',($casesensitive?$tags:strtolower($tags)));
$searchtags=explode(' ',$t);
$filtered=array();
foreach($this->links as $l)
{
$linktags = explode(' ',($casesensitive?$l['tags']:strtolower($l['tags'])));
if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
$filtered[$l['linkdate']] = $l;
}
krsort($filtered);
return $filtered;
}
// Filter by day. Day must be in the form 'YYYYMMDD' (eg. '20120125')
// Sort order is: older articles first.
// eg. print_r($mydb->filterDay('20120125'));
public function filterDay($day)
{
$filtered=array();
foreach($this->links as $l)
{
if (startsWith($l['linkdate'],$day)) $filtered[$l['linkdate']] = $l;
}
ksort($filtered);
return $filtered;
}
// Filter by smallHash.
// Only 1 article is returned.
public function filterSmallHash($smallHash)
{
$filtered=array();
foreach($this->links as $l)
{
if ($smallHash==smallHash($l['linkdate'])) // Yes, this is ugly and slow
{
$filtered[$l['linkdate']] = $l;
return $filtered;
}
}
return $filtered;
}
// Returns the list of all tags
// Output: associative array key=tags, value=0
public function allTags()
{
$tags=array();
foreach($this->links as $link)
foreach(explode(' ',$link['tags']) as $tag)
if (!empty($tag)) $tags[$tag]=(empty($tags[$tag]) ? 1 : $tags[$tag]+1);
arsort($tags); // Sort tags by usage (most used tag first)
return $tags;
}
// Returns the list of days containing articles (oldest first)
// Output: An array containing days (in format YYYYMMDD).
public function days()
{
$linkdays=array();
foreach(array_keys($this->links) as $day)
{
$linkdays[substr($day,0,8)]=0;
}
$linkdays=array_keys($linkdays);
sort($linkdays);
return $linkdays;
}
}
// ------------------------------------------------------------------------------------------
// Ouput the last N links in RSS 2.0 format.
function showRSS()
{
header('Content-Type: application/rss+xml; charset=utf-8');
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. eg. http://mysite.com/shaarli/?do=rss&permalinks
$usepermalinks = isset($_GET['permalinks']);
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new pageCache(pageUrl(),startsWith($query,'do=rss') && !isLoggedIn());
$cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
// Optionnaly filter the results:
$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $linksToDisplay = $LINKSDB;
$nblinksToDisplay = 50; // Number of links to display.
if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
{
$nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
}
$pageaddr=htmlspecialchars(indexUrl());
echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
echo '<channel><title>'.htmlspecialchars($GLOBALS['title']).'</title><link>'.$pageaddr.'</link>';
echo '<description>Shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n\n";
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
echo '<!-- PubSubHubbub Discovery -->';
echo '<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" xmlns="http://www.w3.org/2005/Atom" />';
echo '<link rel="self" href="'.htmlspecialchars($pageaddr).'?do=rss" xmlns="http://www.w3.org/2005/Atom" />';
echo '<!-- End Of PubSubHubbub Discovery -->';
}
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<$nblinksToDisplay && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$rfc822date = linkdate2rfc822($link['linkdate']);
$absurl = htmlspecialchars($link['url']);
if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
if ($usepermalinks===true)
echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$guid.'</link>';
else
echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$absurl.'</link>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) echo '<pubDate>'.htmlspecialchars($rfc822date)."</pubDate>\n";
if ($link['tags']!='') // Adding tags to each RSS entry (as mentioned in RSS specification)
{
foreach(explode(' ',$link['tags']) as $tag) { echo '<category domain="'.htmlspecialchars($pageaddr).'">'.htmlspecialchars($tag).'</category>'."\n"; }
}
// Add permalink in description
$descriptionlink = '(<a href="'.$guid.'">Permalink</a>)';
// If user wants permalinks first, put the final link in description
if ($usepermalinks===true) $descriptionlink = '(<a href="'.$absurl.'">Link</a>)';
if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink;
echo '<description><![CDATA['.nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description'])))).$descriptionlink.']]></description>'."\n</item>\n";
$i++;
}
echo '</channel></rss><!-- Cached version of '.htmlspecialchars(pageUrl()).' -->';
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Ouput the last N links in ATOM format.
function showATOM()
{
header('Content-Type: application/atom+xml; charset=utf-8');
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. eg. http://mysite.com/shaarli/?do=atom&permalinks
$usepermalinks = isset($_GET['permalinks']);
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new pageCache(pageUrl(),startsWith($query,'do=atom') && !isLoggedIn());
$cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
// Optionnaly filter the results:
$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $linksToDisplay = $LINKSDB;
$nblinksToDisplay = 50; // Number of links to display.
if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
{
$nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
}
$pageaddr=htmlspecialchars(indexUrl());
$latestDate = '';
$entries='';
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<$nblinksToDisplay && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$iso8601date = linkdate2iso8601($link['linkdate']);
$latestDate = max($latestDate,$iso8601date);
$absurl = htmlspecialchars($link['url']);
if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
$entries.='<entry><title>'.htmlspecialchars($link['title']).'</title>';
if ($usepermalinks===true)
$entries.='<link href="'.$guid.'" /><id>'.$guid.'</id>';
else
$entries.='<link href="'.$absurl.'" /><id>'.$guid.'</id>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $entries.='<updated>'.htmlspecialchars($iso8601date).'</updated>';
// Add permalink in description
$descriptionlink = htmlspecialchars('(<a href="'.$guid.'">Permalink</a>)');