index.php

   1 <?php
   2 // Shaarli 0.0.12 beta - 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
   7 // Requires: php 5.1.x
   8
   9 // -----------------------------------------------------------------------------------------------
  10 // User config:
  11 define('DATADIR','data'); // Data subdirectory
  12 define('CONFIG_FILE',DATADIR.'/config.php'); // Configuration file (user login/password)
  13 define('DATASTORE',DATADIR.'/datastore.php'); // Data storage file.
  14 define('LINKS_PER_PAGE',20); // Default links per page.
  15 define('IPBANS_FILENAME',DATADIR.'/ipbans.php'); // File storage for failures and bans.
  16 define('BAN_AFTER',4);       // Ban IP after this many failures.
  17 define('BAN_DURATION',1800); // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes)
  18 define('OPEN_SHAARLI',false); // If true, anyone can add/edit/delete links without having to login
  19 if (get_magic_quotes_gpc())
  20 {
  21     header('Content-Type: text/plain; charset=utf-8');
  22     echo "ERROR: magic_quotes_gpc is ON in your php config. This is *BAD*. You *MUST* disable it, either by changing the value in php.ini,\n";
  23     echo "or by adding the following line in .htaccess: php_flag magic_quotes_gpc Off"; exit;
  24 }
  25 checkphpversion();
  26
  27 // -----------------------------------------------------------------------------------------------
  28 // Program config (touch at your own risks !)
  29 error_reporting(E_ALL^E_WARNING);  // See all error except warnings.
  30 //error_reporting(-1); // See all errors (for debugging only)
  31 $STARTTIME = microtime(true);  // Measure page execution time.
  32 ob_start();
  33 // Prevent caching: (yes, it's ugly)
  34 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  35 header("Cache-Control: no-store, no-cache, must-revalidate");
  36 header("Cache-Control: post-check=0, pre-check=0", false);
  37 header("Pragma: no-cache");
  38 define('shaarli_version','0.0.12 beta');
  39 if (!is_dir(DATADIR)) { mkdir(DATADIR,0705); chmod(DATADIR,0705); }
  40 if (!is_file(DATADIR.'/.htaccess')) { file_put_contents(DATADIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
  41 if (!is_file(CONFIG_FILE)) install();
  42 require CONFIG_FILE;  // Read login/password hash into $GLOBALS.
  43 ini_set('max_input_time','60');  // High execution time in case of problematic imports/exports.
  44 ini_set('memory_limit', '128M');  // Try to set max upload file size and read (May not work on some hosts).
  45 ini_set('post_max_size', '16M');
  46 ini_set('upload_max_filesize', '16M');
  47 define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
  48 define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
  49 autoLocale(); // Sniff browser language and set date format accordingly.
  50 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
  51 $LINKSDB=false;
  52
  53 // Check php version
  54 function checkphpversion()
  55 {
  56     $ver=phpversion();
  57     if (preg_match('!(\d+)\.(\d+)\.(\d+)!',$ver,$matches)) // (because phpversion() sometimes returns strings like "5.2.4-2ubuntu5.2")
  58     {
  59         list($match,$major,$minor,$release) = $matches;
  60         if ($major>=5 && $minor>=1) return; // 5.1.x or higher is ok.
  61         die('Your server supports php '.$ver.'. Shaarli requires at last php 5.1, and thus cannot run. Sorry.');
  62     }
  63     // if cannot check php version... well, at your own risks.
  64 }
  65
  66 // -----------------------------------------------------------------------------------------------
  67 // Log to text file
  68 function logm($message)
  69 {
  70     if (!file_exists(DATADIR.'/log.txt')) {$logFile = fopen(DATADIR.'/log.txt','w'); }
  71     else { $logFile = fopen(DATADIR.'/log.txt','a'); }
  72     fwrite($logFile,strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n");
  73     fclose($logFile);
  74 }
  75
  76 // ------------------------------------------------------------------------------------------
  77 // Sniff browser language to display dates in the right format automatically.
  78 // (Note that is may not work on your server if the corresponding local is not installed.)
  79 function autoLocale()
  80 {
  81     $loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
  82     if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
  83     {   // (It's a bit crude, but it works very well. Prefered language is always presented first.)
  84         if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
  85     }
  86     setlocale(LC_TIME,$loc);  // LC_TIME = Set local for date/time format only.
  87 }
  88
  89 // ------------------------------------------------------------------------------------------
  90 // Session management
  91 define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
  92 ini_set('session.use_cookies', 1);       // Use cookies to store session.
  93 ini_set('session.use_only_cookies', 1);  // Force cookies for session (phpsessionID forbidden in URL)
  94 ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
  95 session_name('shaarli');
  96 session_start();
  97
  98 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
  99 function allIPs()
 100 {
 101     $ip = $_SERVER["REMOTE_ADDR"];
 102     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 103     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 104     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 105     return $ip;
 106 }
 107
 108 // Check that user/password is correct.
 109 function check_auth($login,$password)
 110 {
 111     $hash = sha1($password.$login.$GLOBALS['salt']);
 112     if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
 113     {   // Login/password is correct.
 114         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
 115         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 116         $_SESSION['username']=$login;
 117         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 118         logm('Login successful');
 119         return True;
 120     }
 121     logm('Login failed for user '.$login);
 122     return False;
 123 }
 124
 125 // Returns true if the user is logged in.
 126 function isLoggedIn()
 127 {
 128     if (OPEN_SHAARLI) return true;
 129
 130     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 131     if (empty($_SESSION['uid']) || $_SESSION['ip']!=allIPs() || time()>=$_SESSION['expires_on'])
 132     {
 133         logout();
 134         return false;
 135     }
 136     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // User accessed a page : Update his/her session expiration date.
 137     return true;
 138 }
 139
 140 // Force logout.
 141 function logout() { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']);}
 142
 143
 144 // ------------------------------------------------------------------------------------------
 145 // Brute force protection system
 146 // Several consecutive failed logins will ban the IP address for 30 minutes.
 147 if (!is_file(IPBANS_FILENAME)) file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
 148 include IPBANS_FILENAME;
 149 // Signal a failed login. Will ban the IP if too many failures:
 150 function ban_loginFailed()
 151 {
 152     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 153     if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
 154     $gb['FAILURES'][$ip]++;
 155     if ($gb['FAILURES'][$ip]>(BAN_AFTER-1))
 156     {
 157         $gb['BANS'][$ip]=time()+BAN_DURATION;
 158         logm('IP address banned from login');
 159     }
 160     $GLOBALS['IPBANS'] = $gb;
 161     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 162 }
 163
 164 // Signals a successful login. Resets failed login counter.
 165 function ban_loginOk()
 166 {
 167     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 168     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 169     $GLOBALS['IPBANS'] = $gb;
 170     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 171 }
 172
 173 // Checks if the user CAN login. If 'true', the user can try to login.
 174 function ban_canLogin()
 175 {
 176     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 177     if (isset($gb['BANS'][$ip]))
 178     {
 179         // User is banned. Check if the ban has expired:
 180         if ($gb['BANS'][$ip]<=time())
 181         {   // Ban expired, user can try to login again.
 182             logm('Ban lifted.');
 183             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 184             file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 185             return true; // Ban has expired, user can login.
 186         }
 187         return false; // User is banned.
 188     }
 189     return true; // User is not banned.
 190 }
 191
 192 // ------------------------------------------------------------------------------------------
 193 // Process login form: Check if login/password is correct.
 194 if (isset($_POST['login']))
 195 {
 196     if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
 197     if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
 198     {   // Login/password is ok.
 199         ban_loginOk();
 200         // Optional redirect after login:
 201         if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
 202         if (isset($_POST['returnurl'])) { header('Location: '.$_POST['returnurl']); exit; }
 203         header('Location: ?'); exit;
 204     }
 205     else
 206     {
 207         ban_loginFailed();
 208         echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login\';</script>'; // Redirect to login screen.
 209         exit;
 210     }
 211 }
 212
 213 // ------------------------------------------------------------------------------------------
 214 // Misc utility functions:
 215
 216 // Returns the server URL (including port and http/https), without path.
 217 // eg. "http://myserver.com:8080"
 218 // You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
 219 function serverUrl()
 220 {
 221         $serverport = ($_SERVER["SERVER_PORT"]!='80' ? ':'.$_SERVER["SERVER_PORT"] : '');
 222         return 'http'.(!empty($_SERVER['HTTPS'])?'s':'').'://'.$_SERVER["SERVER_NAME"].$serverport;
 223 }
 224
 225 // Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
 226 function return_bytes($val)
 227 {
 228     $val = trim($val); $last=strtolower($val[strlen($val)-1]);
 229     switch($last)
 230     {
 231         case 'g': $val *= 1024;
 232         case 'm': $val *= 1024;
 233         case 'k': $val *= 1024;
 234     }
 235     return $val;
 236 }
 237
 238 // Try to determine max file size for uploads (POST).
 239 // Returns an integer (in bytes)
 240 function getMaxFileSize()
 241 {
 242     $size1 = return_bytes(ini_get('post_max_size'));
 243     $size2 = return_bytes(ini_get('upload_max_filesize'));
 244     // Return the smaller of two:
 245     $maxsize = min($size1,$size2);
 246     // FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
 247     return $maxsize;
 248 }
 249
 250 // Tells if a string start with a substring or not.
 251 function startsWith($haystack,$needle,$case=true)
 252 {
 253     if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
 254     return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
 255 }
 256
 257 // Tells if a string ends with a substring or not.
 258 function endsWith($haystack,$needle,$case=true)
 259 {
 260     if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
 261     return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
 262 }
 263
 264 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
 265     (used to build the ADD_DATE attribute in Netscape-bookmarks file)
 266     PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
 267 function linkdate2timestamp($linkdate)
 268 {
 269     $Y=$M=$D=$h=$m=$s=0;
 270     $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
 271     return mktime($h,$m,$s,$M,$D,$Y);
 272 }
 273
 274 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
 275     (used to build the pubDate attribute in RSS feed.)  */
 276 function linkdate2rfc822($linkdate)
 277 {
 278     return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
 279 }
 280
 281 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
 282     (used to display link date on screen)
 283     The date format is automatically chose according to locale/languages sniffed from browser headers (see autoLocale()). */
 284 function linkdate2locale($linkdate)
 285 {
 286     return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
 287     // Note that if you use a local which is not installed on your webserver,
 288     // the date will not be displayed in the chosen locale, but probably in US notation.
 289 }
 290
 291 // Parse HTTP response headers and return an associative array.
 292 function http_parse_headers( $headers )
 293 {
 294     $res=array();
 295     foreach($headers as $header)
 296     {
 297         $i = strpos($header,': ');
 298         if ($i)
 299         {
 300             $key=substr($header,0,$i);
 301             $value=substr($header,$i+2,strlen($header)-$i-2);
 302             $res[$key]=$value;
 303         }
 304     }
 305     return $res;
 306 }
 307
 308 /* GET an URL.
 309    Input: $url : url to get (http://...)
 310           $timeout : Network timeout (will wait this many seconds for an anwser before giving up).
 311    Output: An array.  [0] = HTTP status message (eg. "HTTP/1.1 200 OK") or error message
 312                       [1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
 313                       [2] = data
 314     Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
 315              if (strpos($httpstatus,'200 OK'))
 316                  echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
 317              else
 318                  echo 'There was an error: '.htmlspecialchars($httpstatus)
 319 */
 320 function getHTTP($url,$timeout=30)
 321 {
 322     try
 323     {
 324         $options = array('http'=>array('method'=>'GET','timeout' => $timeout)); // Force network timeout
 325         $context = stream_context_create($options);
 326         $data=file_get_contents($url,false,$context,-1, 2000000); // We download at most 2 Mb from source.
 327         if (!$data) { $lasterror=error_get_last();  return array($lasterror['message'],array(),''); }
 328         $httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
 329         $responseHeaders=http_parse_headers($http_response_header);
 330         return array($httpStatus,$responseHeaders,$data);
 331     }
 332     catch (Exception $e)  // getHTTP *can* fail silentely (we don't care if the title cannot be fetched)
 333     {
 334         return array($e->getMessage(),'','');
 335     }
 336 }
 337
 338 // Extract title from an HTML document.
 339 // (Returns an empty string if not found.)
 340 function html_extract_title($html)
 341 {
 342   return preg_match('!<title>(.*?)</title>!i', $html, $matches) ? $matches[1] : '';
 343 }
 344
 345 // ------------------------------------------------------------------------------------------
 346 // Token management for XSRF protection
 347 // Token should be used in any form which acts on data (create,update,delete,import...).
 348 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 349
 350 // Returns a token.
 351 function getToken()
 352 {
 353     $rnd = sha1(uniqid('',true).'_'.mt_rand());  // We generate a random string.
 354     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 355     return $rnd;
 356 }
 357
 358 // Tells if a token is ok. Using this function will destroy the token.
 359 // true=token is ok.
 360 function tokenOk($token)
 361 {
 362     if (isset($_SESSION['tokens'][$token]))
 363     {
 364         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 365         return true; // Token is ok.
 366     }
 367     return false; // Wrong token, or already used.
 368 }
 369
 370 // ------------------------------------------------------------------------------------------
 371 /* Data storage for links.
 372    This object behaves like an associative array.
 373    Example:
 374       $mylinks = new linkdb();
 375       echo $mylinks['20110826_161819']['title'];
 376       foreach($mylinks as $link)
 377          echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
 378
 379    We implement 3 interfaces:
 380      - ArrayAccess so that this object behaves like an associative array.
 381      - Iterator so that this object can be used in foreach() loops.
 382      - Countable interface so that we can do a count() on this object.
 383 */
 384 class linkdb implements Iterator, Countable, ArrayAccess
 385
 386 {
 387     private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
 388     private $urls;  // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
 389     private $keys;  // List of linkdate keys (for the Iterator interface implementation)
 390     private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
 391     private $loggedin; // Is the used logged in ? (used to filter private links)
 392
 393     // Constructor:
 394     function __construct($isLoggedIn)
 395     // Input : $isLoggedIn : is the used logged in ?
 396     {
 397         $this->loggedin = $isLoggedIn;
 398         $this->checkdb(); // Make sure data file exists.
 399         $this->readdb();  // Then read it.
 400     }
 401
 402     // ---- Countable interface implementation
 403     public function count() { return count($this->links); }
 404
 405     // ---- ArrayAccess interface implementation
 406     public function offsetSet($offset, $value)
 407     {
 408         if (!$this->loggedin) die('You are not authorized to add a link.');
 409         if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
 410         if (empty($offset)) die('You must specify a key.');
 411         $this->links[$offset] = $value;
 412         $this->urls[$value['url']]=$offset;
 413     }
 414     public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
 415     public function offsetUnset($offset)
 416     {
 417         if (!$this->loggedin) die('You are not authorized to delete a link.');
 418         $url = $this->links[$offset]['url']; unset($this->urls[$url]);
 419         unset($this->links[$offset]);
 420     }
 421     public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
 422
 423     // ---- Iterator interface implementation
 424     function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
 425     function key() { return $this->keys[$this->position]; } // current key
 426     function current() { return $this->links[$this->keys[$this->position]]; } // current value
 427     function next() { ++$this->position; } // go to next item
 428     function valid() { return isset($this->keys[$this->position]); }    // Check if current position is valid.
 429
 430     // ---- Misc methods
 431     private function checkdb() // Check if db directory and file exists.
 432     {
 433         if (!file_exists(DATASTORE)) // Create a dummy database for example.
 434         {
 435              $this->links = array();
 436              $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');
 437              $this->links[$link['linkdate']] = $link;
 438              $link = array('title'=>'My secret stuff... - Pastebin.com','url'=>'http://pastebin.com/smCEEeSn','description'=>'SShhhh!!  I\'m a private link only YOU can see. You can delete me too.','private'=>1,'linkdate'=>'20110914_074522','tags'=>'secretstuff');
 439              $this->links[$link['linkdate']] = $link;
 440              file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
 441         }
 442     }
 443
 444     // Read database from disk to memory
 445     private function readdb()
 446     {
 447         // Read data
 448         $this->links=(file_exists(DATASTORE) ? unserialize(gzinflate(base64_decode(substr(file_get_contents(DATASTORE),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
 449
 450         // If user is not logged in, filter private links.
 451         if (!$this->loggedin)
 452         {
 453             $toremove=array();
 454             foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
 455             foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
 456         }
 457
 458         // Keep the list of the mapping URLs-->linkdate up-to-date.
 459         $this->urls=array();
 460         foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
 461     }
 462
 463     // Save database from memory to disk.
 464     public function savedb()
 465     {
 466         if (!$this->loggedin) die('You are not authorized to change the database.');
 467         file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
 468     }
 469
 470     // Returns the link for a given URL (if it exists). false it does not exist.
 471     public function getLinkFromUrl($url)
 472     {
 473         if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
 474         return false;
 475     }
 476
 477     // Case insentitive search among links (in url, title and description). Returns filtered list of links.
 478     // eg. print_r($mydb->filterTags('hollandais'));
 479     public function filterFulltext($searchterms)
 480     {
 481         // FIXME: explode(' ',$searchterms) and perform a AND search.
 482         // FIXME: accept double-quotes to search for a string "as is" ?
 483         $filtered=array();
 484         $s = strtolower($searchterms);
 485         foreach($this->links as $l)
 486         {
 487             $found=strpos(strtolower($l['title']),$s) || strpos(strtolower($l['description']),$s) || strpos(strtolower($l['url']),$s) || strpos(strtolower($l['tags']),$s);
 488             if ($found) $filtered[$l['linkdate']] = $l;
 489         }
 490         krsort($filtered);
 491         return $filtered;
 492     }
 493
 494     // Filter by tag.
 495     // You can specify one or more tags (tags can be separated by space or comma).
 496     // eg. print_r($mydb->filterTags('linux programming'));
 497     public function filterTags($tags)
 498     {
 499         $t = str_replace(',',' ',strtolower($tags));
 500         $searchtags=explode(' ',$t);
 501         $filtered=array();
 502         foreach($this->links as $l)
 503         {
 504             $linktags = explode(' ',strtolower($l['tags']));
 505             if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
 506                 $filtered[$l['linkdate']] = $l;
 507         }
 508         krsort($filtered);
 509         return $filtered;
 510     }
 511
 512     // Returns the list of all tags
 513     // Output: associative array key=tags, value=0
 514     public function allTags()
 515     {
 516         $tags=array();
 517         foreach($this->links as $link)
 518             foreach(explode(' ',$link['tags']) as $tag)
 519                 if (!empty($tag)) $tags[$tag]=0;
 520         ksort($tags); // FIXME: sort by usage ? That would be better.
 521         return $tags;
 522     }
 523
 524 }
 525
 526 // ------------------------------------------------------------------------------------------
 527 // Ouput the last 50 links in RSS 2.0 format.
 528 function showRSS()
 529 {
 530     global $LINKSDB;
 531     header('Content-Type: application/xhtml+xml; charset=utf-8');
 532     $pageaddr=htmlspecialchars(serverUrl().$_SERVER["SCRIPT_NAME"]);
 533     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
 534     echo '<channel><title>Shared links on '.$pageaddr.'</title><link>'.$pageaddr.'</link>';
 535     echo '<description>Shared links</description><language></language><copyright>'.$pageaddr.'</copyright>'."\n\n";
 536     $i=0;
 537     $keys=array(); foreach($LINKSDB as $key=>$value) { $keys[]=$key; }  // No, I can't use array_keys().
 538     while ($i<50 && $i<count($keys))
 539     {
 540         $link = $LINKSDB[$keys[$i]];
 541         $rfc822date = linkdate2rfc822($link['linkdate']);
 542         echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid>'.htmlspecialchars($link['url']).'</guid><link>'.htmlspecialchars($link['url']).'</link><pubDate>'.htmlspecialchars($rfc822date).'</pubDate>';
 543         echo '<description><![CDATA['.htmlspecialchars($link['description']).']]></description></item>'."\n";
 544         $i++;
 545     }
 546     echo '</channel></rss>';
 547     exit;
 548 }
 549
 550 // ------------------------------------------------------------------------------------------
 551 // Render HTML page:
 552 function renderPage()
 553 {
 554     global $STARTTIME;
 555     global $LINKSDB;
 556
 557     // Well... rendering the page would be 100x better with the excellent Smarty, but I don't want to tie this minimalist project to 100+ files.
 558     // So I use a custom templating system.
 559
 560     // -------- Display login form.
 561     if (startswith($_SERVER["QUERY_STRING"],'do=login'))
 562     {
 563         if (OPEN_SHAARLI) { header('Location: ?'); exit; }  // No need to login for open Shaarli
 564         if (!ban_canLogin())
 565         {
 566             $loginform='<div id="headerform">You have been banned from login after too many failed attempts. Try later.</div>';
 567             $data = array('pageheader'=>$loginform,'body'=>'','onload'=>'');
 568             templatePage($data);
 569             exit;
 570         }
 571         $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 572         $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login">&nbsp;&nbsp;&nbsp;Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
 573         $onload = 'onload="document.loginform.login.focus();"';
 574         $data = array('pageheader'=>$loginform,'body'=>'','onload'=>$onload);
 575         templatePage($data);
 576         exit;
 577     }
 578
 579     // -------- User wants to logout.
 580     if (startswith($_SERVER["QUERY_STRING"],'do=logout'))
 581     {
 582         logout();
 583         header('Location: ?');
 584         exit;
 585     }
 586
 587     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 588     if (isset($_GET['addtag']))
 589     {
 590         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 591         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 592         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 593         $params['searchtags'] = (empty($params['searchtags']) ?  trim($_GET['addtag']) : trim($params['searchtags'].' '.urlencode($_GET['addtag'])));
 594         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 595         header('Location: ?'.http_build_query($params));
 596         exit;
 597     }
 598
 599     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 600     if (isset($_GET['removetag']))
 601     {
 602         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 603         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER
 604         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 605         if (isset($params['searchtags']))
 606         {
 607             $tags = explode(' ',$params['searchtags']);
 608             $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags.
 609             if (count($tags)==0) unset($params['searchtags']); else $params['searchtags'] = implode(' ',$tags);
 610             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 611         }
 612         header('Location: ?'.http_build_query($params));
 613         exit;
 614     }
 615
 616     // -------- User wants to change the number of links per page (linksperpage=...)
 617     if (isset($_GET['linksperpage']))
 618     {
 619         if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); }
 620         header('Location: '.(empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']));
 621         exit;
 622     }
 623
 624
 625     // -------- Handle other actions allowed for non-logged in users:
 626     if (!isLoggedIn())
 627     {
 628         // User tries to post new link but is not loggedin:
 629         // Show login screen, then redirect to ?post=...
 630         if (isset($_GET['post']))
 631         {
 632             header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
 633             exit;
 634         }
 635
 636         // Show search form and display list of links.
 637         $searchform=<<<HTML
 638 <div id="headerform" style="width:100%; white-space:nowrap;";>
 639     <form method="GET" name="searchform" style="display:inline;"><input type="text" name="searchterm" style="width:50%" value=""> <input type="submit" value="Search" class="bigbutton"></form>
 640     <form method="GET" name="tagfilter" style="display:inline;padding-left:24px;"><input type="text" name="searchtags" style="width:20%" value=""> <input type="submit" value="Filter by tag" class="bigbutton"></form>
 641 </div>
 642 HTML;
 643         $onload = 'document.searchform.searchterm.focus();';
 644         $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 645         templatePage($data);
 646         exit; // Never remove this one !
 647     }
 648
 649     // -------- All other functions are reserved for the registered user:
 650
 651     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 652     if (startswith($_SERVER["QUERY_STRING"],'do=tools'))
 653     {
 654         $pageabsaddr=serverUrl().$_SERVER["SCRIPT_NAME"]; // Why doesn't php have a built-in function for that ?
 655         // The javascript code for the bookmarklet:
 656         $toolbar= <<<HTML
 657 <div id="headerform">
 658     <a href="?do=import"><b>Import</b></a> - <small>Import Netscape html bookmarks (as exported from Firefox, Chrome, Opera, delicious...)</small><br>
 659     <a href="?do=export"><b>Export</b></a> - <small>Export Netscape html bookmarks (which can be imported in Firefox, Chrome, Opera, delicious...)</small><br>
 660     <a class="smallbutton" style="color:black;" onclick="alert('Drag this link to your bookmarks toolbar, or right-click it and choose Bookmark This Link...');return false;" href="javascript:javascript:(function(){var%20url%20=%20location.href;var%20title%20=%20document.title%20||%20url;window.open('{$pageabsaddr}?post='%20+%20encodeURIComponent(url)+'&amp;title='%20+%20encodeURIComponent(title)+'&amp;source=bookmarklet','_blank','menubar=no,height=400,width=608,toolbar=no,scrollbars=no,status=no');})();">Shaare link</a> - <small>Drag this link to your bookmarks toolbar (or right-click it and choose Bookmark This Link....). Then click "Shaare link" button in any page you want to share.</small>
 661 </div>
 662 HTML;
 663         $data = array('pageheader'=>$toolbar,'body'=>'','onload'=>'');
 664         templatePage($data);
 665         exit;
 666     }
 667
 668     // -------- User wants to add a link without using the bookmarklet: show form.
 669     if (startswith($_SERVER["QUERY_STRING"],'do=addlink'))
 670     {
 671         $onload = 'document.addform.post.focus();';
 672         $addform= '<div id="headerform"><form method="GET" action="" name="addform"><input type="text" name="post" style="width:70%;"> <input type="submit" value="Add link" class="bigbutton"></div>';
 673         $data = array('pageheader'=>$addform,'body'=>'','onload'=>$onload);
 674         templatePage($data);
 675         exit;
 676     }
 677
 678     // -------- User clicked the "Save" button when editing a link: Save link to database.
 679     if (isset($_POST['save_edit']))
 680     {
 681         if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
 682         $linkdate=$_POST['lf_linkdate'];
 683         $link = array('title'=>trim($_POST['lf_title']),'url'=>trim($_POST['lf_url']),'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
 684                       'linkdate'=>$linkdate,'tags'=>trim($_POST['lf_tags']));
 685         if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
 686         $LINKSDB[$linkdate] = $link;
 687         $LINKSDB->savedb(); // save to disk
 688
 689         // If we are called from the bookmarklet, we must close the popup:
 690         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 691         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 692         header('Location: '.$returnurl); // After saving the link, redirect to the page the user was on.
 693         exit;
 694     }
 695
 696     // -------- User clicked the "Cancel" button when editing a link.
 697     if (isset($_POST['cancel_edit']))
 698     {
 699         // If we are called from the bookmarklet, we must close the popup;
 700         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 701         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 702         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
 703         exit;
 704     }
 705
 706     // -------- User clicked the "Delete" button when editing a link : Delete link from database.
 707     if (isset($_POST['delete_link']))
 708     {
 709         if (!tokenOk($_POST['token'])) die('Wrong token.');
 710         // We do not need to ask for confirmation:
 711         // - confirmation is handled by javascript
 712         // - we are protected from XSRF by the token.
 713         $linkdate=$_POST['lf_linkdate'];
 714         unset($LINKSDB[$linkdate]);
 715         $LINKSDB->savedb(); // save to disk
 716         // If we are called from the bookmarklet, we must close the popup:
 717         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 718         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 719         header('Location: '.$returnurl); // After deleting the link, redirect to the page the user was on.
 720         exit;
 721     }
 722
 723     // -------- User clicked the "EDIT" button on a link: Display link edit form.
 724     if (isset($_GET['edit_link']))
 725     {
 726         $link = $LINKSDB[$_GET['edit_link']];  // Read database
 727         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
 728         list($editform,$onload)=templateEditForm($link);
 729         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 730         templatePage($data);
 731         exit;
 732     }
 733
 734     // -------- User want to post a new link: Display link edit form.
 735     if (isset($_GET['post']))
 736     {
 737         $url=$_GET['post'];
 738
 739         // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
 740         $i=strpos($url,'&utm_source='); if ($i) $url=substr($url,0,$i);
 741         $i=strpos($url,'?utm_source='); if ($i) $url=substr($url,0,$i);
 742
 743         $link_is_new = false;
 744         $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link)
 745         if (!$link)
 746         {
 747             $link_is_new = true;  // This is a new link
 748             $linkdate = strval(date('Ymd_His'));
 749             $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet).
 750             $description=''; $tags=''; $private=0;
 751             if (parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url;
 752             // If this is an HTTP link, we try go get the page to extact the title (otherwise we will to straight to the edit form.)
 753             if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http')
 754             {
 755                 list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive.
 756                 // FIXME: Decode charset according to specified in either 1) HTTP response headers or 2) <head> in html
 757                 if (strpos($status,'200 OK')) $title=html_entity_decode(html_extract_title($data),ENT_QUOTES,'UTF-8');
 758             }
 759             $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>0);
 760         }
 761         list($editform,$onload)=templateEditForm($link,$link_is_new);
 762         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 763         templatePage($data);
 764         exit;
 765     }
 766
 767     // -------- Export as Netscape Bookmarks HTML file.
 768     if (startswith($_SERVER["QUERY_STRING"],'do=export'))
 769     {
 770         header('Content-Type: text/html; charset=utf-8');
 771         header('Content-disposition: attachment; filename=bookmarks_'.strval(date('Ymd_His')).'.html');
 772         echo <<<HTML
 773 <!DOCTYPE NETSCAPE-Bookmark-file-1>
 774 <!-- This is an automatically generated file.
 775      It will be read and overwritten.
 776      DO NOT EDIT! -->
 777 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
 778 <TITLE>Bookmarks</TITLE>
 779 <H1>Bookmarks</H1>
 780 HTML;
 781         foreach($LINKSDB as $link)
 782         {
 783             echo '<DT><A HREF="'.htmlspecialchars($link['url']).'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
 784             if ($link['tags']!='') echo ' TAGS="'.htmlspecialchars(str_replace(' ',',',$link['tags'])).'"';
 785             echo '>'.htmlspecialchars($link['title'])."</A>\n";
 786             if ($link['description']!='') echo '<DD>'.htmlspecialchars($link['description'])."\n";
 787         }
 788         echo '<!-- Shaarli bookmarks export on '.date('Y/m/d H:i:s')."-->\n";
 789         exit;
 790     }
 791
 792     // -------- User is uploading a file for import
 793     if (startswith($_SERVER["QUERY_STRING"],'do=upload'))
 794     {
 795         // If file is too big, some form field may be missing.
 796         if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
 797         {
 798             $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
 799             echo '<script language="JavaScript">alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.htmlspecialchars($returnurl).'\';</script>';
 800             exit;
 801         }
 802         if (!tokenOk($_POST['token'])) die('Wrong token.');
 803         importFile();
 804         exit;
 805     }
 806
 807     // -------- Show upload/import dialog:
 808     if (startswith($_SERVER["QUERY_STRING"],'do=import'))
 809     {
 810         $token = getToken();
 811         $maxfilesize=getMaxFileSize();
 812         $onload = 'onload="document.uploadform.filetoupload.focus();"';
 813         $uploadform=<<<HTML
 814 <div id="headerform">
 815 Import Netscape html bookmarks (as exported from Firefox/Chrome/Opera/delicious/diigo...) (Max: {$maxfilesize} bytes).
 816 <form method="POST" action="?do=upload" enctype="multipart/form-data" name="uploadform">
 817     <input type="hidden" name="token" value="{$token}">
 818     <input type="file" name="filetoupload" size="80">
 819     <input type="hidden" name="MAX_FILE_SIZE" value="{$maxfilesize}">
 820     <input type="submit" name="import_file" value="Import" class="bigbutton">
 821 </form>
 822 </div>
 823 HTML;
 824         $data = array('pageheader'=>$uploadform,'body'=>'','onload'=>$onload  );
 825         templatePage($data);
 826         exit;
 827     }
 828
 829     // -------- Otherwise, simply display search form and links:
 830     $searchform=<<<HTML
 831 <div id="headerform" style="width:100%; white-space:nowrap;";>
 832     <form method="GET" name="searchform" style="display:inline;"><input type="text" name="searchterm" style="width:50%" value=""> <input type="submit" value="Search" class="bigbutton"></form>
 833     <form method="GET" name="tagfilter" style="display:inline;padding-left:24px;"><input type="text" name="searchtags" style="width:20%" value=""> <input type="submit" value="Filter by tag" class="bigbutton"></form>
 834 </div>
 835 HTML;
 836     $onload = 'document.searchform.searchterm.focus();';
 837     $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 838     templatePage($data);
 839     exit;
 840 }
 841
 842 // -----------------------------------------------------------------------------------------------
 843 // Process the import file form.
 844 function importFile()
 845 {
 846     global $LINKSDB;
 847     $filename=$_FILES['filetoupload']['name'];
 848     $filesize=$_FILES['filetoupload']['size'];
 849     $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
 850
 851     // Sniff file type:
 852     $type='unknown';
 853     if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
 854
 855     // Then import the bookmarks.
 856     if ($type=='netscape')
 857     {
 858         // This is a standard Netscape-style bookmark file.
 859         // This format is supported by all browsers (except IE, of course), also delicious, diigo and others.
 860         // I didn't want to use DOM... anyway, this is FAST (less than 1 second to import 7200 links (2.1 Mb html file)).
 861         $before=count($LINKSDB);
 862         foreach(explode('<DT>',$data) as $html) // explode is very fast
 863         {
 864             $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);
 865             $d = explode('<DD>',$html);
 866             if (startswith($d[0],'<A '))
 867             {
 868                 $link['description'] = (isset($d[1]) ? trim($d[1]) : '');  // Get description (optional)
 869                 preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : '');  // Get title
 870                 preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER);  // Get all other attributes
 871                 foreach($matches as $m)
 872                 {
 873                     $attr=$m[1]; $value=$m[2];
 874                     if ($attr=='HREF') $link['url']=$value;
 875                     elseif ($attr=='ADD_DATE') $link['linkdate']=date('Ymd_His',intval($value));
 876                     elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
 877                     elseif ($attr=='TAGS') $link['tags']=str_replace(',',' ',$value);
 878                 }
 879                 if ($link['linkdate']!='' && $link['url']!='')  $LINKSDB[$link['linkdate']] = $link;
 880             }
 881         }
 882         $import_count = count($LINKSDB)-$before;
 883         $LINKSDB->savedb();
 884         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) was successfully imported: '.$import_count.' new links.");document.location=\'?\';</script>';
 885     }
 886     else
 887     {
 888         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
 889     }
 890 }
 891
 892 // -----------------------------------------------------------------------------------------------
 893 /* Template for the edit link form
 894     Input: $link : link to edit (assocative array item as returned by the LINKDB class)
 895 Output: An array : (string) : The html code of the edit link form.
 896                    (string) : The proper onload to use in body.
 897     Example: list($html,$onload)=templateEditForm($mylinkdb['20110805_124532']);
 898              echo $html;
 899 */
 900 function templateEditForm($link,$link_is_new=false)
 901 {
 902     $url=htmlspecialchars($link['url']);
 903     $title=htmlspecialchars($link['title']);
 904     $tags=htmlspecialchars($link['tags']);
 905     $description=htmlspecialchars($link['description']);
 906     $private = ($link['private']==0 ? '' : 'checked="yes"');
 907
 908     // Automatically focus on empty fields:
 909     $onload='onload="document.linkform.lf_tags.focus();"';
 910     if ($description=='') $onload='onload="document.linkform.lf_description.focus();"';
 911     if ($title=='') $onload='onload="document.linkform.lf_title.focus();"';
 912
 913     // Do not show "Delete" button if this is a new link.
 914     $delete_button = '<input type="submit" value="Delete" name="delete_link" class="bigbutton" style="margin-left:180px;" onClick="return confirmDeleteLink();">';
 915     if ($link_is_new) $delete_button='';
 916
 917     $token=getToken(); // XSRF protection.
 918     $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 919     $editlinkform=<<<HTML
 920 <div id="editlinkform">
 921     <form method="post" name="linkform">
 922         <input type="hidden" name="lf_linkdate" value="{$link['linkdate']}">
 923         <i>URL</i><br><input type="text" name="lf_url" value="{$url}" style="width:100%"><br>
 924         <i>Title</i><br><input type="text" name="lf_title" value="{$title}" style="width:100%"><br>
 925         <i>Description</i><br><textarea name="lf_description" rows="4" cols="25" style="width:100%">{$description}</textarea><br>
 926         <i>Tags</i><br><input type="text" id="lf_tags" name="lf_tags" value="{$tags}" style="width:100%"><br>
 927         <input type="checkbox" {$private} style="margin:7 0 10 0;" name="lf_private">&nbsp;<i>Private</i><br>
 928         <input type="submit" value="Save" name="save_edit" class="bigbutton" style="margin-left:40px;">
 929         <input type="submit" value="Cancel" name="cancel_edit" class="bigbutton" style="margin-left:40px;">
 930         {$delete_button}
 931         <input type="hidden" name="token" value="{$token}">
 932         {$returnurl_html}
 933     </form>
 934 </div>
 935 HTML;
 936     return array($editlinkform,$onload);
 937 }
 938
 939
 940 // -----------------------------------------------------------------------------------------------
 941 // Template for the list of links.
 942 // Returns html code to show the list of link according to parameters passed in URL (search terms, page...)
 943 function templateLinkList()
 944 {
 945     global $LINKSDB;
 946
 947     // Search according to entered search terms:
 948     $linksToDisplay=array();
 949     $searched='';
 950     if (!empty($_GET['searchterm'])) // Fulltext search
 951     {
 952         $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
 953         $searched='&nbsp;<b>'.count($linksToDisplay).' results for <i>'.htmlspecialchars($_GET['searchterm']).'</i></b>:';
 954     }
 955     elseif (!empty($_GET['searchtags'])) // Search by tag
 956     {
 957         $linksToDisplay = $LINKSDB->filterTags($_GET['searchtags']);
 958         $tagshtml=''; foreach(explode(' ',$_GET['searchtags']) as $tag) $tagshtml.='<span class="linktag" title="Remove tag"><a href="?removetag='.htmlspecialchars($tag).'">'.htmlspecialchars($tag).' <span style="border-left:1px solid #aaa; padding-left:5px; color:#6767A7;">x</span></a></span> ';
 959         $searched='&nbsp;<b>'.count($linksToDisplay).' results for tags '.$tagshtml.':</b>';
 960     }
 961     else
 962         $linksToDisplay = $LINKSDB;  // otherwise, display without filtering.
 963
 964     $linklist='';
 965     $actions='';
 966
 967     // Handle paging.
 968     /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess ???
 969        "Warning: array_keys() expects parameter 1 to be array, object given in ... "
 970        If my class implements ArrayAccess, why won't array_keys() accept it ?  ( $keys=array_keys($linksToDisplay); )
 971     */
 972     $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks php.
 973     $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']);
 974     $pagecount = ($pagecount==0 ? 1 : $pagecount);
 975     $page=( empty($_GET['page']) ? 1 : intval($_GET['page']));
 976     $page = ( $page<1 ? 1 : $page );
 977     $page = ( $page>$pagecount ? $pagecount : $page );
 978     $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index.
 979     $end = $i+$_SESSION['LINKS_PER_PAGE'];
 980     while ($i<$end && $i<count($keys))
 981     {
 982         $link = $linksToDisplay[$keys[$i]];
 983         $description=$link['description'];
 984         $title=$link['title'];
 985         $classprivate = ($link['private']==0 ? '' : 'class="private"');
 986         if (isLoggedIn()) $actions=' <form method="GET" class="buttoneditform"><input type="hidden" name="edit_link" value="'.$link['linkdate'].'"><input type="submit" value="Edit" class="smallbutton"></form>';
 987         $tags='';
 988         if ($link['tags']!='') foreach(explode(' ',$link['tags']) as $tag) { $tags.='<span class="linktag" title="Add tag"><a href="?addtag='.htmlspecialchars($tag).'">'.htmlspecialchars($tag).'</a></span> '; }
 989         $linklist.='<li '.$classprivate.'><span class="linktitle"><a href="'.htmlspecialchars($link['url']).'">'.htmlspecialchars($title).'</a></span>'.$actions.'<br>';
 990         if ($description!='') $linklist.='<div class="linkdescription">'.nl2br(htmlspecialchars($description)).'</div><br>';
 991         $linklist.='<span class="linkdate">'.htmlspecialchars(linkdate2locale($link['linkdate'])).' - </span><span class="linkurl">'.htmlspecialchars($link['url']).'</span><br>'.$tags."</li>\n";
 992         $i++;
 993     }
 994
 995     // Show paging.
 996     $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
 997     $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
 998     $paging='';
 999     if ($i!=count($keys)) $paging.='<a href="?page='.($page+1).$searchterm.$searchtags.'">&#x25C4;Older</a>';
1000     $paging.= '<span style="color:#fff; padding:0 20 0 20;">page '.$page.' / '.$pagecount.'</span>';
1001     if ($page>1) $paging.='<a href="?page='.($page-1).$searchterm.$searchtags.'">Newer&#x25BA;</a>';
1002     $linksperpage = <<<HTML
1003 <div style="float:right; padding-right:5px;">
1004 Links per page: <a href="?linksperpage=20">20</a> <a href="?linksperpage=50">50</a> <a href="?linksperpage=100">100</a>
1005  <form method="GET" style="display:inline;"><input type="text" name="linksperpage" size="2" style="height:15px;"></form></div>
1006 HTML;
1007     $paging = '<div class="paging">'.$linksperpage.$paging.'</div>';
1008     $linklist='<div id="linklist">'.$paging.$searched.'<ul>'.$linklist.'</ul>'.$paging.'</div>';
1009     return $linklist;
1010 }
1011
1012 // -----------------------------------------------------------------------------------------------
1013 // Template for the whole page.
1014 /* Input: $data (associative array).
1015                 Keys: 'body' : body of HTML document
1016                       'pageheader' : html code to show in page header (top of page)
1017                       'onload' : optional onload javascript for the <body>
1018 */
1019 function templatePage($data)
1020 {
1021     global $STARTTIME;
1022     global $LINKSDB;
1023     $shaarli_version = shaarli_version;
1024     $linkcount = count($LINKSDB);
1025     $open='';
1026     if (OPEN_SHAARLI)
1027     {
1028         $menu=' <a href="?do=tools">Tools</a> &nbsp;<a href="?do=addlink"><b>Add link</b></a>';
1029         $open='Open ';
1030     }
1031     else
1032         $menu=(isLoggedIn() ? ' <a href="?do=logout">Logout</a> &nbsp;<a href="?do=tools">Tools</a> &nbsp;<a href="?do=addlink"><b>Add link</b></a>' : ' <a href="?do=login">Login</a>');
1033     foreach(array('pageheader','body','onload') as $k) // make sure all required fields exist (put an empty string if not).
1034     {
1035         if (!array_key_exists($k,$data)) $data[$k]='';
1036     }
1037     $jsincludes=''; $jsincludes_bottom = '';
1038     if (OPEN_SHAARLI || isLoggedIn())
1039     {
1040         $jsincludes='<script language="JavaScript" src="jquery.min.js"></script><script language="JavaScript" src="jquery-ui.custom.min.js"></script>';
1041         $source = serverUrl().$_SERVER['SCRIPT_NAME'].'?ws=tags';
1042         $jsincludes_bottom = <<<JS
1043 <script language="JavaScript">
1044 $(document).ready(function()
1045 {
1046     $('#lf_tags').autocomplete({source:'{$source}',minLength:0});
1047 });
1048 </script>
1049 JS;
1050     }
1051     $feedurl=htmlspecialchars(serverUrl().$_SERVER['SCRIPT_NAME'].'?do=rss');
1052     echo <<<HTML
1053 <html>
1054 <head>
1055 <title>{$open}Shaarli - Let's shaare your links...</title>
1056 <link rel="alternate" type="application/rss+xml" href="{$feedurl}">
1057 {$jsincludes}
1058 <style type="text/css">
1059 <!--
1060 /* CSS Reset from Yahoo to cope with browsers CSS inconsistencies. */
1061 /*
1062 Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html
1063 version: 2.8.2r1
1064 */
1065 html{color:#000;background:#FFF;}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,button,textarea,p,blockquote,th,td{margin:0;padding:0;}table{border-collapse:collapse;border-spacing:0;}fieldset,img{border:0;}address,caption,cite,code,dfn,em,strong,th,var,optgroup{font-style:inherit;font-weight:inherit;}del,ins{text-decoration:none;}li{list-style:none;}caption,th{text-align:left;}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal;}q:before,q:after{content:'';}abbr,acronym{border:0;font-variant:normal;}sup{vertical-align:baseline;}sub{vertical-align:baseline;}legend{color:#000;}input,button,textarea,select,optgroup,option{font-family:inherit;font-size:inherit;font-style:inherit;font-weight:inherit;}input,button,textarea,select{*font-size:100%;}
1066
1067 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1068 input { border: 1px solid #aaa; background-color:#F0F0FF; padding: 2 5 2 5; -moz-box-shadow: inset 2px 2px 3px #aaaaaa; -webkit-box-shadow: inset 2px 2px 3px #aaaaaa; box-shadow: inset 2px 2px 3px #aaaaaa; }
1069 textarea { border: 1px solid #aaa; background-color:#F0F0FF; padding: 2 5 2 5; -moz-box-shadow: inset 2px 2px 3px #B2B2C4; -webkit-box-shadow: inset 2px 2px 3px #B2B2C4; box-shadow: inset 2px 2px 3px #B2B2C4; }
1070 /* I don't give a shit about IE. He can't understand selectors such as input[type='submit']. */
1071
1072 .bigbutton {border-style:outset;border-width:2px;padding:3px 6px;background-color:rgb(212,212,212);font-family:Tahoma,Verdana,Arial,Helvetica,sans-serif;font-size:8pt;-moz-border-radius:0.5em;border-radius:0.5em;}
1073 .smallbutton {border-style:outset;border-width:2px;padding:0px 4px;background-color:rgb(212,212,212);font-family:Tahoma,Verdana,Arial,Helvetica,sans-serif;font-size:8pt;-moz-border-radius:0.5em;border-radius:0.5em;}
1074 #pageheader
1075 {
1076 color:#eee;
1077 border-bottom: 1px solid #aaa;
1078 background-color: #6A6A6A;
1079 background-image: -webkit-gradient(linear, left top, left bottom, from(#6A6A6A), to(#303030)); /* Saf4+, Chrome */
1080 background-image: -webkit-linear-gradient(top, #6A6A6A, #303030); /* Chrome 10+, Saf5.1+ */
1081 background-image:    -moz-linear-gradient(top, #6A6A6A, #303030); /* FF3.6 */
1082 background-image:     -ms-linear-gradient(top, #6A6A6A, #303030); /* IE10 */
1083 background-image:      -o-linear-gradient(top, #6A6A6A, #303030); /* Opera 11.10+ */
1084 background-image:         linear-gradient(top, #6A6A6A, #303030);
1085 filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#6A6A6A', EndColorStr='#303030'); /* IE6-IE9 */
1086 padding-bottom: 5px;
1087 }
1088 #pageheader a:link { color:#bbb; text-decoration:none;}
1089 #pageheader a:visited { color:#bbb; text-decoration:none;}
1090 #pageheader a:hover { color:#FFFFC9; text-decoration:none;}
1091 #pageheader a:active { color:#bbb; text-decoration:none;}
1092 .paging { background-color:#777; color:#ccc; text-align:center; padding:0 0 3 0;}
1093 .paging a:link { color:#ccc; text-decoration:none;}
1094 .paging a:visited { color:#ccc;  }
1095 .paging a:hover {  color:#FFFFC9;  }
1096 .paging a:active { color:#fff;  }
1097 #headerform { padding:5 5 5 15;  }
1098 #editlinkform {  padding:5 5 5 15px; width:80%; }
1099 #linklist li { padding:4 10 8 20; border-bottom: 1px solid #bbb;}
1100 #linklist li.private { background-color: #ccc; border-left:8px solid #888; }
1101 .linktitle { font-size:14pt; font-weight:bold; }
1102 .linktitle a { text-decoration: none; color:#0000EE; }
1103 .linktitle a:hover { text-decoration: underline; }
1104 .linktitle a:visited { color:#0000BB; }
1105 .linkdate { font-size:8pt; color:#888; }
1106 .linkurl { font-size:8pt; color:#4BAA74; }
1107 .linkdescription { color:#000; margin-top:0px; margin-bottom:0px; font-weight:normal; }
1108 .linktag { font-size:9pt; color:#777; background-color:#ddd; padding:0 6 0 6; -moz-box-shadow: inset 2px 2px 3px #ffffff; -webkit-box-shadow: inset 2px 2px 3px #ffffff; box-shadow: inset 2px 2px 3px ffffff;
1109 border-bottom:1px solid #aaa; border-right:1px solid #aaa;  }
1110 .linktag a { color:#777; text-decoration:none;  }
1111 .buttoneditform { display:inline; }
1112 #footer { font-size:8pt; text-align:center; border-top:1px solid #ddd; color: #888; }
1113
1114 /* Minimal customisation for jQuery widgets */
1115 .ui-autocomplete { background-color:#fff; padding-left:5px;}
1116 .ui-state-hover { background-color: #604dff; color:#fff; }
1117
1118 -->
1119 </style>
1120 </head>
1121 <body {$data['onload']}>
1122 <div id="pageheader"><div style="float:right; font-style:italic; color:#bbb; text-align:right; padding:0 5 0 0;">Shaare your links...<br>{$linkcount} links</div>
1123     <b><i>{$open}Shaarli {$shaarli_version}</i></b> - <a href="?">Home</a>&nbsp;{$menu}&nbsp;<a href="{$feedurl}" style="padding-left:30px;">RSS Feed</a>
1124 {$data['pageheader']}
1125 </div>
1126 {$data['body']}
1127
1128 HTML;
1129     $exectime = round(microtime(true)-$STARTTIME,4);
1130     echo '<div id="footer"><b><a href="http://sebsauvage.net/wiki/doku.php?id=php:shaarli">Shaarli '.shaarli_version.'</a></b> - The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net<br>Who gives a shit that this page was generated in '.$exectime.' seconds&nbsp;?</div>';
1131     if (isLoggedIn()) echo '<script language="JavaScript">function confirmDeleteLink() { var agree=confirm("Are you sure you want to delete this link ?"); if (agree) return true ; else return false ; }</script>';
1132     echo $jsincludes_bottom.'</body></html>';
1133 }
1134
1135 // -----------------------------------------------------------------------------------------------
1136 // Installation
1137 // This function should NEVER be called if the file data/config.php exists.
1138 function install()
1139 {
1140     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1141     {
1142         $tz=(empty($_POST['settimezone']) ? 'UTC':$_POST['settimezone']);
1143         // Everything is ok, let's create config file.
1144         $salt=sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
1145         $hash = sha1($_POST['setpassword'].$_POST['setlogin'].$salt);
1146         $config='<?php $GLOBALS[\'login\']='.var_export($_POST['setlogin'],true).'; $GLOBALS[\'hash\']='.var_export($hash,true).'; $GLOBALS[\'salt\']='.var_export($salt,true).'; date_default_timezone_set('.var_export($tz,true).'); ?>';
1147         if (!file_put_contents(CONFIG_FILE,$config) || strcmp(file_get_contents(CONFIG_FILE),$config)!=0)
1148         {
1149             echo '<script language="JavaScript">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>';
1150             exit;
1151         }
1152         echo '<script language="JavaScript">alert("Shaarli is now configured. Please enter your login/password and start shaaring your links !");document.location=\'?do=login\';</script>';
1153         exit;
1154    }
1155     // Display config form:
1156     $timezoneselect='';
1157     if (function_exists('timezone_identifiers_list')) // because of old php version (5.1) which can be found on free.fr
1158     {
1159         $timezones='';
1160         foreach(timezone_identifiers_list() as $tz) $timezones.='<option value="'.htmlspecialchars($tz).'">'.htmlspecialchars($tz)."</option>\n";
1161         $timezoneselect='Timezone: <select name="settimezone"><option value="" selected>(please select:)</option>'.$timezones.'</select><br><br>';
1162     }
1163     echo <<<HTML
1164 <html><title>Shaarli - Configuration</title><style type="text/css">
1165 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1166 input { border: 1px solid #aaa; background-color:#F0F0FF; padding: 2 5 2 5; -moz-box-shadow: inset 2px 2px 3px #aaaaaa; -webkit-box-shadow: inset 2px 2px 3px #aaaaaa; box-shadow: inset 2px 2px 3px #aaaaaa; }
1167 .bigbutton {border-style:outset;border-width:2px;padding:3px 6px;background-color:rgb(212,212,212);font-family:Tahoma,Verdana,Arial,Helvetica,sans-serif;font-size:8pt;-moz-border-radius:0.5em;border-radius:0.5em;}
1168 </style></head><body onload="document.configform.setlogin.focus();"><h1>Shaarli - Shaare your links...</h1>It looks like it's the first time you run Shaarli. Please chose a login/password and a timezone:<br>
1169 <form method="POST" action="" name="configform" style="border:1px solid black; padding:10 10 10 10;">
1170 Login: <input type="text" name="setlogin"><br><br>Password: <input type="password" name="setpassword"><br><br>
1171 {$timezoneselect}
1172 <input type="submit" name="Save" value="Save config" class="bigbutton"></form></body></html>
1173 HTML;
1174     exit;
1175 }
1176
1177 // Webservices (for use with jQuery/jQueryUI)
1178 // eg.  index.php?ws=tags&term=minecr
1179 function processWS()
1180 {
1181     if (empty($_GET['ws']) || empty($_GET['term'])) return;
1182     $term = $_GET['term'];
1183     global $LINKSDB;
1184     header('Content-Type: application/json; charset=utf-8');
1185
1186     // Search in tags
1187     if ($_GET['ws']=='tags')
1188     {
1189         $tags=explode(' ',$term); $last = array_pop($tags); // Get the last term ("a b c d" ==> "a b c", "d")
1190         $addtags=''; if ($tags) $addtags=implode(' ',$tags).' '; // We will pre-pend previous tags
1191         $suggested=array();
1192         /* To speed up things, we store list of tags in session */
1193         if (empty($_SESSION['tags'])) $_SESSION['tags'] = $LINKSDB->allTags();
1194         foreach($_SESSION['tags'] as $key=>$value)
1195         {
1196             if (startsWith($key,$last,$case=false)) $suggested[$addtags.$key.' ']=0;
1197         }
1198         echo json_encode(array_keys($suggested));
1199         exit;
1200     }
1201 }
1202
1203 $LINKSDB=new linkdb(isLoggedIn() || OPEN_SHAARLI);  // Read links from database (and filter private links if used it not logged in).
1204 if (startswith($_SERVER["QUERY_STRING"],'ws=')) { processWS(); exit; } // Webservices (for jQuery/jQueryUI)
1205 if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=LINKS_PER_PAGE;
1206 if (startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
1207 renderPage();
1208 ?>