index.php

   1 <?php
   2 // Shaarli 0.0.11 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 if (get_magic_quotes_gpc())
  19 {
  20     header('Content-Type: text/plain; charset=utf-8');
  21     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";
  22     echo "or by adding the following line in .htaccess: php_flag magic_quotes_gpc Off"; exit;
  23 }
  24 checkphpversion();
  25
  26 // -----------------------------------------------------------------------------------------------
  27 // Program config (touch at your own risks !)
  28 error_reporting(E_ALL^E_WARNING);  // See all error except warnings.
  29 //error_reporting(-1); // See all errors (for debugging only)
  30 $STARTTIME = microtime(true);  // Measure page execution time.
  31 ob_start();
  32 // Prevent caching: (yes, it's ugly)
  33 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  34 header("Cache-Control: no-store, no-cache, must-revalidate");
  35 header("Cache-Control: post-check=0, pre-check=0", false);
  36 header("Pragma: no-cache");
  37 define('shaarli_version','0.0.11 beta');
  38 if (!is_dir(DATADIR)) { mkdir(DATADIR,0705); chmod(DATADIR,0705); }
  39 if (!is_file(DATADIR.'/.htaccess')) { file_put_contents(DATADIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
  40 if (!is_file(CONFIG_FILE)) install();
  41 require CONFIG_FILE;  // Read login/password hash into $GLOBALS.
  42 ini_set('max_input_time','60');  // High execution time in case of problematic imports/exports.
  43 ini_set('memory_limit', '128M');  // Try to set max upload file size and read (May not work on some hosts).
  44 ini_set('post_max_size', '16M');
  45 ini_set('upload_max_filesize', '16M');
  46 define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
  47 define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
  48 autoLocale(); // Sniff browser language and set date format accordingly.
  49 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
  50 $LINKSDB=false;
  51
  52 // Check php version
  53 function checkphpversion()
  54 {
  55     $ver=phpversion();
  56     if (preg_match('!(\d+)\.(\d+)\.(\d+)!',$ver,$matches)) // (because phpversion() sometimes returns strings like "5.2.4-2ubuntu5.2")
  57     {
  58         list($match,$major,$minor,$release) = $matches;
  59         if ($major>=5 && $minor>=1) return; // 5.1.x or higher is ok.
  60         die('Your server supports php '.$ver.'. Shaarli requires at last php 5.1, and thus cannot run. Sorry.');
  61     }
  62     // if cannot check php version... well, at your own risks.
  63 }
  64
  65 // -----------------------------------------------------------------------------------------------
  66 // Log to text file
  67 function logm($message)
  68 {
  69     if (!file_exists(DATADIR.'/log.txt')) {$logFile = fopen(DATADIR.'/log.txt','w'); }
  70     else { $logFile = fopen(DATADIR.'/log.txt','a'); }
  71     fwrite($logFile,strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n");
  72     fclose($logFile);
  73 }
  74
  75 // ------------------------------------------------------------------------------------------
  76 // Sniff browser language to display dates in the right format automatically.
  77 // (Note that is may not work on your server if the corresponding local is not installed.)
  78 function autoLocale()
  79 {
  80     $loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
  81     if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
  82     {   // (It's a bit crude, but it works very well. Prefered language is always presented first.)
  83         if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
  84     }
  85     setlocale(LC_TIME,$loc);  // LC_TIME = Set local for date/time format only.
  86 }
  87
  88 // ------------------------------------------------------------------------------------------
  89 // Session management
  90 define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
  91 ini_set('session.use_cookies', 1);       // Use cookies to store session.
  92 ini_set('session.use_only_cookies', 1);  // Force cookies for session (phpsessionID forbidden in URL)
  93 ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
  94 session_name('shaarli');
  95 session_start();
  96
  97 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
  98 function allIPs()
  99 {
 100     $ip = $_SERVER["REMOTE_ADDR"];
 101     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
 102     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
 103     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
 104     return $ip;
 105 }
 106
 107 // Check that user/password is correct.
 108 function check_auth($login,$password)
 109 {
 110     $hash = sha1($password.$login.$GLOBALS['salt']);
 111     if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
 112     {   // Login/password is correct.
 113         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
 114         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 115         $_SESSION['username']=$login;
 116         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 117         logm('Login successful');
 118         return True;
 119     }
 120     logm('Login failed for user '.$login);
 121     return False;
 122 }
 123
 124 // Returns true if the user is logged in.
 125 function isLoggedIn()
 126 {
 127     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 128     if (empty($_SESSION['uid']) || $_SESSION['ip']!=allIPs() || time()>=$_SESSION['expires_on'])
 129     {
 130         logout();
 131         return false;
 132     }
 133     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // User accessed a page : Update his/her session expiration date.
 134     return true;
 135 }
 136
 137 // Force logout.
 138 function logout() { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']);}
 139
 140
 141 // ------------------------------------------------------------------------------------------
 142 // Brute force protection system
 143 // Several consecutive failed logins will ban the IP address for 30 minutes.
 144 if (!is_file(IPBANS_FILENAME)) file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
 145 include IPBANS_FILENAME;
 146 // Signal a failed login. Will ban the IP if too many failures:
 147 function ban_loginFailed()
 148 {
 149     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 150     if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
 151     $gb['FAILURES'][$ip]++;
 152     if ($gb['FAILURES'][$ip]>(BAN_AFTER-1))
 153     {
 154         $gb['BANS'][$ip]=time()+BAN_DURATION;
 155         logm('IP address banned from login');
 156     }
 157     $GLOBALS['IPBANS'] = $gb;
 158     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 159 }
 160
 161 // Signals a successful login. Resets failed login counter.
 162 function ban_loginOk()
 163 {
 164     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 165     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 166     $GLOBALS['IPBANS'] = $gb;
 167     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 168 }
 169
 170 // Checks if the user CAN login. If 'true', the user can try to login.
 171 function ban_canLogin()
 172 {
 173     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 174     if (isset($gb['BANS'][$ip]))
 175     {
 176         // User is banned. Check if the ban has expired:
 177         if ($gb['BANS'][$ip]<=time())
 178         {   // Ban expired, user can try to login again.
 179             logm('Ban lifted.');
 180             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 181             file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 182             return true; // Ban has expired, user can login.
 183         }
 184         return false; // User is banned.
 185     }
 186     return true; // User is not banned.
 187 }
 188
 189 // ------------------------------------------------------------------------------------------
 190 // Process login form: Check if login/password is correct.
 191 if (isset($_POST['login']))
 192 {
 193     if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
 194     if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
 195     {   // Login/password is ok.
 196         ban_loginOk();
 197         // Optional redirect after login:
 198         if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
 199         if (isset($_POST['returnurl'])) { header('Location: '.$_POST['returnurl']); exit; }
 200         header('Location: ?'); exit;
 201     }
 202     else
 203     {
 204         ban_loginFailed();
 205         echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login\';</script>'; // Redirect to login screen.
 206         exit;
 207     }
 208 }
 209
 210 // ------------------------------------------------------------------------------------------
 211 // Misc utility functions:
 212
 213 // Returns the server URL (including port and http/https), without path.
 214 // eg. "http://myserver.com:8080"
 215 // You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
 216 function serverUrl()
 217 {
 218         $serverport = ($_SERVER["SERVER_PORT"]!='80' ? ':'.$_SERVER["SERVER_PORT"] : '');
 219         return 'http'.(!empty($_SERVER['HTTPS'])?'s':'').'://'.$_SERVER["SERVER_NAME"].$serverport;
 220 }
 221
 222 // Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
 223 function return_bytes($val)
 224 {
 225     $val = trim($val); $last=strtolower($val[strlen($val)-1]);
 226     switch($last)
 227     {
 228         case 'g': $val *= 1024;
 229         case 'm': $val *= 1024;
 230         case 'k': $val *= 1024;
 231     }
 232     return $val;
 233 }
 234
 235 // Try to determine max file size for uploads (POST).
 236 // Returns an integer (in bytes)
 237 function getMaxFileSize()
 238 {
 239     $size1 = return_bytes(ini_get('post_max_size'));
 240     $size2 = return_bytes(ini_get('upload_max_filesize'));
 241     // Return the smaller of two:
 242     $maxsize = min($size1,$size2);
 243     // FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
 244     return $maxsize;
 245 }
 246
 247 // Tells if a string start with a substring or not.
 248 function startsWith($haystack,$needle,$case=true)
 249 {
 250     if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
 251     return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
 252 }
 253
 254 // Tells if a string ends with a substring or not.
 255 function endsWith($haystack,$needle,$case=true)
 256 {
 257     if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
 258     return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
 259 }
 260
 261 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
 262     (used to build the ADD_DATE attribute in Netscape-bookmarks file)
 263     PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
 264 function linkdate2timestamp($linkdate)
 265 {
 266     $Y=$M=$D=$h=$m=$s=0;
 267     $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
 268     return mktime($h,$m,$s,$M,$D,$Y);
 269 }
 270
 271 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
 272     (used to build the pubDate attribute in RSS feed.)  */
 273 function linkdate2rfc822($linkdate)
 274 {
 275     return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
 276 }
 277
 278 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
 279     (used to display link date on screen)
 280     The date format is automatically chose according to locale/languages sniffed from browser headers (see autoLocale()). */
 281 function linkdate2locale($linkdate)
 282 {
 283     return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
 284     // Note that if you use a local which is not installed on your webserver,
 285     // the date will not be displayed in the chosen locale, but probably in US notation.
 286 }
 287
 288 // Parse HTTP response headers and return an associative array.
 289 function http_parse_headers( $headers )
 290 {
 291     $res=array();
 292     foreach($headers as $header)
 293     {
 294         $i = strpos($header,': ');
 295         if ($i)
 296         {
 297             $key=substr($header,0,$i);
 298             $value=substr($header,$i+2,strlen($header)-$i-2);
 299             $res[$key]=$value;
 300         }
 301     }
 302     return $res;
 303 }
 304
 305 /* GET an URL.
 306    Input: $url : url to get (http://...)
 307           $timeout : Network timeout (will wait this many seconds for an anwser before giving up).
 308    Output: An array.  [0] = HTTP status message (eg. "HTTP/1.1 200 OK") or error message
 309                       [1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
 310                       [2] = data
 311     Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
 312              if (strpos($httpstatus,'200 OK'))
 313                  echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
 314              else
 315                  echo 'There was an error: '.htmlspecialchars($httpstatus)
 316 */
 317 function getHTTP($url,$timeout=30)
 318 {
 319     try
 320     {
 321         $options = array('http'=>array('method'=>'GET','timeout' => $timeout)); // Force network timeout
 322         $context = stream_context_create($options);
 323         $data=file_get_contents($url,false,$context,-1, 2000000); // We download at most 2 Mb from source.
 324         if (!$data) { $lasterror=error_get_last();  return array($lasterror['message'],array(),''); }
 325         $httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
 326         $responseHeaders=http_parse_headers($http_response_header);
 327         return array($httpStatus,$responseHeaders,$data);
 328     }
 329     catch (Exception $e)  // getHTTP *can* fail silentely (we don't care if the title cannot be fetched)
 330     {
 331         return array($e->getMessage(),'','');
 332     }
 333 }
 334
 335 // Extract title from an HTML document.
 336 // (Returns an empty string if not found.)
 337 function html_extract_title($html)
 338 {
 339   return preg_match('!<title>(.*?)</title>!i', $html, $matches) ? $matches[1] : '';
 340 }
 341
 342 // ------------------------------------------------------------------------------------------
 343 // Token management for XSRF protection
 344 // Token should be used in any form which acts on data (create,update,delete,import...).
 345 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 346
 347 // Returns a token.
 348 function getToken()
 349 {
 350     $rnd = sha1(uniqid('',true).'_'.mt_rand());  // We generate a random string.
 351     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 352     return $rnd;
 353 }
 354
 355 // Tells if a token is ok. Using this function will destroy the token.
 356 // true=token is ok.
 357 function tokenOk($token)
 358 {
 359     if (isset($_SESSION['tokens'][$token]))
 360     {
 361         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 362         return true; // Token is ok.
 363     }
 364     return false; // Wrong token, or already used.
 365 }
 366
 367 // ------------------------------------------------------------------------------------------
 368 /* Data storage for links.
 369    This object behaves like an associative array.
 370    Example:
 371       $mylinks = new linkdb();
 372       echo $mylinks['20110826_161819']['title'];
 373       foreach($mylinks as $link)
 374          echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
 375
 376    We implement 3 interfaces:
 377      - ArrayAccess so that this object behaves like an associative array.
 378      - Iterator so that this object can be used in foreach() loops.
 379      - Countable interface so that we can do a count() on this object.
 380 */
 381 class linkdb implements Iterator, Countable, ArrayAccess
 382
 383 {
 384     private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
 385     private $urls;  // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
 386     private $keys;  // List of linkdate keys (for the Iterator interface implementation)
 387     private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
 388     private $loggedin; // Is the used logged in ? (used to filter private links)
 389
 390     // Constructor:
 391     function __construct($isLoggedIn)
 392     // Input : $isLoggedIn : is the used logged in ?
 393     {
 394         $this->loggedin = $isLoggedIn;
 395         $this->checkdb(); // Make sure data file exists.
 396         $this->readdb();  // Then read it.
 397     }
 398
 399     // ---- Countable interface implementation
 400     public function count() { return count($this->links); }
 401
 402     // ---- ArrayAccess interface implementation
 403     public function offsetSet($offset, $value)
 404     {
 405         if (!$this->loggedin) die('You are not authorized to add a link.');
 406         if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
 407         if (empty($offset)) die('You must specify a key.');
 408         $this->links[$offset] = $value;
 409         $this->urls[$value['url']]=$offset;
 410     }
 411     public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
 412     public function offsetUnset($offset)
 413     {
 414         if (!$this->loggedin) die('You are not authorized to delete a link.');
 415         $url = $this->links[$offset]['url']; unset($this->urls[$url]);
 416         unset($this->links[$offset]);
 417     }
 418     public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
 419
 420     // ---- Iterator interface implementation
 421     function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
 422     function key() { return $this->keys[$this->position]; } // current key
 423     function current() { return $this->links[$this->keys[$this->position]]; } // current value
 424     function next() { ++$this->position; } // go to next item
 425     function valid() { return isset($this->keys[$this->position]); }    // Check if current position is valid.
 426
 427     // ---- Misc methods
 428     private function checkdb() // Check if db directory and file exists.
 429     {
 430         if (!file_exists(DATASTORE)) // Create a dummy database for example.
 431         {
 432              $this->links = array();
 433              $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');
 434              $this->links[$link['linkdate']] = $link;
 435              $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');
 436              $this->links[$link['linkdate']] = $link;
 437              file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
 438         }
 439     }
 440
 441     // Read database from disk to memory
 442     private function readdb()
 443     {
 444         // Read data
 445         $this->links=(file_exists(DATASTORE) ? unserialize(gzinflate(base64_decode(substr(file_get_contents(DATASTORE),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
 446
 447         // If user is not logged in, filter private links.
 448         if (!$this->loggedin)
 449         {
 450             $toremove=array();
 451             foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
 452             foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
 453         }
 454
 455         // Keep the list of the mapping URLs-->linkdate up-to-date.
 456         $this->urls=array();
 457         foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
 458     }
 459
 460     // Save database from memory to disk.
 461     public function savedb()
 462     {
 463         if (!$this->loggedin) die('You are not authorized to change the database.');
 464         file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
 465     }
 466
 467     // Returns the link for a given URL (if it exists). false it does not exist.
 468     public function getLinkFromUrl($url)
 469     {
 470         if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
 471         return false;
 472     }
 473
 474     // Case insentitive search among links (in url, title and description). Returns filtered list of links.
 475     // eg. print_r($mydb->filterTags('hollandais'));
 476     public function filterFulltext($searchterms)
 477     {
 478         // FIXME: explode(' ',$searchterms) and perform a AND search.
 479         // FIXME: accept double-quotes to search for a string "as is" ?
 480         $filtered=array();
 481         $s = strtolower($searchterms);
 482         foreach($this->links as $l)
 483         {
 484             $found=strpos(strtolower($l['title']),$s) || strpos(strtolower($l['description']),$s) || strpos(strtolower($l['url']),$s) || strpos(strtolower($l['tags']),$s);
 485             if ($found) $filtered[$l['linkdate']] = $l;
 486         }
 487         krsort($filtered);
 488         return $filtered;
 489     }
 490
 491     // Filter by tag.
 492     // You can specify one or more tags (tags can be separated by space or comma).
 493     // eg. print_r($mydb->filterTags('linux programming'));
 494     public function filterTags($tags)
 495     {
 496         $t = str_replace(',',' ',strtolower($tags));
 497         $searchtags=explode(' ',$t);
 498         $filtered=array();
 499         foreach($this->links as $l)
 500         {
 501             $linktags = explode(' ',strtolower($l['tags']));
 502             if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
 503                 $filtered[$l['linkdate']] = $l;
 504         }
 505         krsort($filtered);
 506         return $filtered;
 507
 508     }
 509 }
 510
 511 // ------------------------------------------------------------------------------------------
 512 // Ouput the last 50 links in RSS 2.0 format.
 513 function showRSS()
 514 {
 515     global $LINKSDB;
 516     header('Content-Type: application/xhtml+xml; charset=utf-8');
 517     $pageaddr=htmlspecialchars(serverUrl().$_SERVER["SCRIPT_NAME"]);
 518     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
 519     echo '<channel><title>Shared links on '.$pageaddr.'</title><link>'.$pageaddr.'</link>';
 520     echo '<description>Shared links</description><language></language><copyright>'.$pageaddr.'</copyright>'."\n\n";
 521     $i=0;
 522     $keys=array(); foreach($LINKSDB as $key=>$value) { $keys[]=$key; }  // No, I can't use array_keys().
 523     while ($i<50 && $i<count($keys))
 524     {
 525         $link = $LINKSDB[$keys[$i]];
 526         $rfc822date = linkdate2rfc822($link['linkdate']);
 527         echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid>'.htmlspecialchars($link['url']).'</guid><link>'.htmlspecialchars($link['url']).'</link><pubDate>'.htmlspecialchars($rfc822date).'</pubDate>';
 528         echo '<description><![CDATA['.htmlspecialchars($link['description']).']]></description></item>'."\n";
 529         $i++;
 530     }
 531     echo '</channel></rss>';
 532     exit;
 533 }
 534
 535 // ------------------------------------------------------------------------------------------
 536 // Render HTML page:
 537 function renderPage()
 538 {
 539     global $STARTTIME;
 540     global $LINKSDB;
 541
 542     // Well... rendering the page would be 100x better with the excellent Smarty, but I don't want to tie this minimalist project to 100+ files.
 543     // So I use a custom templating system.
 544
 545     // -------- Display login form.
 546     if (startswith($_SERVER["QUERY_STRING"],'do=login'))
 547     {
 548         if (!ban_canLogin())
 549         {
 550             $loginform='<div id="headerform">You have been banned from login after too many failed attempts. Try later.</div>';
 551             $data = array('pageheader'=>$loginform,'body'=>'','onload'=>'');
 552             templatePage($data);
 553             exit;
 554         }
 555         $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 556         $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login">&nbsp;&nbsp;&nbsp;Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
 557         $onload = 'onload="document.loginform.login.focus();"';
 558         $data = array('pageheader'=>$loginform,'body'=>'','onload'=>$onload);
 559         templatePage($data);
 560         exit;
 561     }
 562
 563     // -------- User wants to logout.
 564     if (startswith($_SERVER["QUERY_STRING"],'do=logout'))
 565     {
 566         logout();
 567         header('Location: ?');
 568         exit;
 569     }
 570
 571     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 572     if (isset($_GET['addtag']))
 573     {
 574         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 575         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 576         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 577         $params['searchtags'] = (empty($params['searchtags']) ?  trim($_GET['addtag']) : trim($params['searchtags'].' '.urlencode($_GET['addtag'])));
 578         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 579         header('Location: ?'.http_build_query($params));
 580         exit;
 581     }
 582
 583     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 584     if (isset($_GET['removetag']))
 585     {
 586         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 587         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER
 588         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 589         if (isset($params['searchtags']))
 590         {
 591             $tags = explode(' ',$params['searchtags']);
 592             $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags.
 593             if (count($tags)==0) unset($params['searchtags']); else $params['searchtags'] = implode(' ',$tags);
 594             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 595         }
 596         header('Location: ?'.http_build_query($params));
 597         exit;
 598     }
 599
 600     // -------- User wants to change the number of links per page (linksperpage=...)
 601     if (isset($_GET['linksperpage']))
 602     {
 603         if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); }
 604         header('Location: '.(empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']));
 605         exit;
 606     }
 607
 608
 609     // -------- Handle other actions allowed for non-logged in users:
 610     if (!isLoggedIn())
 611     {
 612         // User tries to post new link but is not loggedin:
 613         // Show login screen, then redirect to ?post=...
 614         if (isset($_GET['post']))
 615         {
 616             header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
 617             exit;
 618         }
 619
 620         // Show search form and display list of links.
 621         $searchform=<<<HTML
 622 <div id="headerform" style="width:100%; white-space:nowrap;";>
 623     <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>
 624     <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>
 625 </div>
 626 HTML;
 627         $onload = 'document.searchform.searchterm.focus();';
 628         $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 629         templatePage($data);
 630         exit; // Never remove this one !
 631     }
 632
 633     // -------- All other functions are reserved for the registered user:
 634
 635     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 636     if (startswith($_SERVER["QUERY_STRING"],'do=tools'))
 637     {
 638         $pageabsaddr=serverUrl().$_SERVER["SCRIPT_NAME"]; // Why doesn't php have a built-in function for that ?
 639         // The javascript code for the bookmarklet:
 640         $toolbar= <<<HTML
 641 <div id="headerform">
 642     <a href="?do=import"><b>Import</b></a> - <small>Import Netscape html bookmarks (as exported from Firefox, Chrome, Opera, delicious...)</small><br>
 643     <a href="?do=export"><b>Export</b></a> - <small>Export Netscape html bookmarks (which can be imported in Firefox, Chrome, Opera, delicious...)</small><br>
 644     <a class="smallbutton" style="color:black;" onclick="alert('Drag this link to your bookmarks toolbar, or right-click it and choose Bookmark This Link...');return false;" href="javascript:javascript:(function(){var%20url%20=%20location.href;var%20title%20=%20document.title%20||%20url;window.open('{$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>
 645 </div>
 646 HTML;
 647         $data = array('pageheader'=>$toolbar,'body'=>'','onload'=>'');
 648         templatePage($data);
 649         exit;
 650     }
 651
 652     // -------- User wants to add a link without using the bookmarklet: show form.
 653     if (startswith($_SERVER["QUERY_STRING"],'do=addlink'))
 654     {
 655         $onload = 'document.addform.post.focus();';
 656         $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>';
 657         $data = array('pageheader'=>$addform,'body'=>'','onload'=>$onload);
 658         templatePage($data);
 659         exit;
 660     }
 661
 662     // -------- User clicked the "Save" button when editing a link: Save link to database.
 663     if (isset($_POST['save_edit']))
 664     {
 665         if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
 666         $linkdate=$_POST['lf_linkdate'];
 667         $link = array('title'=>trim($_POST['lf_title']),'url'=>trim($_POST['lf_url']),'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
 668                       'linkdate'=>$linkdate,'tags'=>trim($_POST['lf_tags']));
 669         if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
 670         $LINKSDB[$linkdate] = $link;
 671         $LINKSDB->savedb(); // save to disk
 672
 673         // If we are called from the bookmarklet, we must close the popup:
 674         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 675         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 676         header('Location: '.$returnurl); // After saving the link, redirect to the page the user was on.
 677         exit;
 678     }
 679
 680     // -------- User clicked the "Cancel" button when editing a link.
 681     if (isset($_POST['cancel_edit']))
 682     {
 683         // If we are called from the bookmarklet, we must close the popup;
 684         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 685         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 686         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
 687         exit;
 688     }
 689
 690     // -------- User clicked the "Delete" button when editing a link : Delete link from database.
 691     if (isset($_POST['delete_link']))
 692     {
 693         if (!tokenOk($_POST['token'])) die('Wrong token.');
 694         // We do not need to ask for confirmation:
 695         // - confirmation is handled by javascript
 696         // - we are protected from XSRF by the token.
 697         $linkdate=$_POST['lf_linkdate'];
 698         unset($LINKSDB[$linkdate]);
 699         $LINKSDB->savedb(); // save to disk
 700         // If we are called from the bookmarklet, we must close the popup:
 701         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 702         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 703         header('Location: '.$returnurl); // After deleting the link, redirect to the page the user was on.
 704         exit;
 705     }
 706
 707     // -------- User clicked the "EDIT" button on a link: Display link edit form.
 708     if (isset($_GET['edit_link']))
 709     {
 710         $link = $LINKSDB[$_GET['edit_link']];  // Read database
 711         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
 712         list($editform,$onload)=templateEditForm($link);
 713         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 714         templatePage($data);
 715         exit;
 716     }
 717
 718     // -------- User want to post a new link: Display link edit form.
 719     if (isset($_GET['post']))
 720     {
 721         $url=$_GET['post'];
 722
 723         // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
 724         $i=strpos($url,'&utm_source='); if ($i) $url=substr($url,0,$i);
 725         $i=strpos($url,'?utm_source='); if ($i) $url=substr($url,0,$i);
 726
 727         $link_is_new = false;
 728         $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link)
 729         if (!$link)
 730         {
 731             $link_is_new = true;  // This is a new link
 732             $linkdate = strval(date('Ymd_His'));
 733             $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet).
 734             $description=''; $tags=''; $private=0;
 735             if (parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url;
 736             // 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.)
 737             if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http')
 738             {
 739                 list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive.
 740                 // FIXME: Decode charset according to specified in either 1) HTTP response headers or 2) <head> in html
 741                 if (strpos($status,'200 OK')) $title=html_entity_decode(html_extract_title($data),ENT_QUOTES,'UTF-8');
 742             }
 743             $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>0);
 744         }
 745         list($editform,$onload)=templateEditForm($link,$link_is_new);
 746         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 747         templatePage($data);
 748         exit;
 749     }
 750
 751     // -------- Export as Netscape Bookmarks HTML file.
 752     if (startswith($_SERVER["QUERY_STRING"],'do=export'))
 753     {
 754         header('Content-Type: text/html; charset=utf-8');
 755         header('Content-disposition: attachment; filename=bookmarks_'.strval(date('Ymd_His')).'.html');
 756         echo <<<HTML
 757 <!DOCTYPE NETSCAPE-Bookmark-file-1>
 758 <!-- This is an automatically generated file.
 759      It will be read and overwritten.
 760      DO NOT EDIT! -->
 761 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
 762 <TITLE>Bookmarks</TITLE>
 763 <H1>Bookmarks</H1>
 764 HTML;
 765         foreach($LINKSDB as $link)
 766         {
 767             echo '<DT><A HREF="'.htmlspecialchars($link['url']).'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
 768             if ($link['tags']!='') echo ' TAGS="'.htmlspecialchars(str_replace(' ',',',$link['tags'])).'"';
 769             echo '>'.htmlspecialchars($link['title'])."</A>\n";
 770             if ($link['description']!='') echo '<DD>'.htmlspecialchars($link['description'])."\n";
 771         }
 772         echo '<!-- Shaarli bookmarks export on '.date('Y/m/d H:i:s')."-->\n";
 773         exit;
 774     }
 775
 776     // -------- User is uploading a file for import
 777     if (startswith($_SERVER["QUERY_STRING"],'do=upload'))
 778     {
 779         // If file is too big, some form field may be missing.
 780         if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
 781         {
 782             $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
 783             echo '<script language="JavaScript">alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.htmlspecialchars($returnurl).'\';</script>';
 784             exit;
 785         }
 786         if (!tokenOk($_POST['token'])) die('Wrong token.');
 787         importFile();
 788         exit;
 789     }
 790
 791     // -------- Show upload/import dialog:
 792     if (startswith($_SERVER["QUERY_STRING"],'do=import'))
 793     {
 794         $token = getToken();
 795         $maxfilesize=getMaxFileSize();
 796         $onload = 'onload="document.uploadform.filetoupload.focus();"';
 797         $uploadform=<<<HTML
 798 <div id="headerform">
 799 Import Netscape html bookmarks (as exported from Firefox/Chrome/Opera/delicious/diigo...) (Max: {$maxfilesize} bytes).
 800 <form method="POST" action="?do=upload" enctype="multipart/form-data" name="uploadform">
 801     <input type="hidden" name="token" value="{$token}">
 802     <input type="file" name="filetoupload" size="80">
 803     <input type="hidden" name="MAX_FILE_SIZE" value="{$maxfilesize}">
 804     <input type="submit" name="import_file" value="Import" class="bigbutton">
 805 </form>
 806 </div>
 807 HTML;
 808         $data = array('pageheader'=>$uploadform,'body'=>'','onload'=>$onload  );
 809         templatePage($data);
 810         exit;
 811     }
 812
 813     // -------- Otherwise, simply display search form and links:
 814     $searchform=<<<HTML
 815 <div id="headerform" style="width:100%; white-space:nowrap;";>
 816     <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>
 817     <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>
 818 </div>
 819 HTML;
 820     $onload = 'document.searchform.searchterm.focus();';
 821     $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 822     templatePage($data);
 823     exit;
 824 }
 825
 826 // -----------------------------------------------------------------------------------------------
 827 // Process the import file form.
 828 function importFile()
 829 {
 830     global $LINKSDB;
 831     $filename=$_FILES['filetoupload']['name'];
 832     $filesize=$_FILES['filetoupload']['size'];
 833     $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
 834
 835     // Sniff file type:
 836     $type='unknown';
 837     if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
 838
 839     // Then import the bookmarks.
 840     if ($type=='netscape')
 841     {
 842         // This is a standard Netscape-style bookmark file.
 843         // This format is supported by all browsers (except IE, of course), also delicious, diigo and others.
 844         // I didn't want to use DOM... anyway, this is FAST (less than 1 second to import 7200 links (2.1 Mb html file)).
 845         $before=count($LINKSDB);
 846         foreach(explode('<DT>',$data) as $html) // explode is very fast
 847         {
 848             $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);
 849             $d = explode('<DD>',$html);
 850             if (startswith($d[0],'<A '))
 851             {
 852                 $link['description'] = (isset($d[1]) ? trim($d[1]) : '');  // Get description (optional)
 853                 preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : '');  // Get title
 854                 preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER);  // Get all other attributes
 855                 foreach($matches as $m)
 856                 {
 857                     $attr=$m[1]; $value=$m[2];
 858                     if ($attr=='HREF') $link['url']=$value;
 859                     elseif ($attr=='ADD_DATE') $link['linkdate']=date('Ymd_His',intval($value));
 860                     elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
 861                     elseif ($attr=='TAGS') $link['tags']=str_replace(',',' ',$value);
 862                 }
 863                 if ($link['linkdate']!='' && $link['url']!='')  $LINKSDB[$link['linkdate']] = $link;
 864             }
 865         }
 866         $import_count = count($LINKSDB)-$before;
 867         $LINKSDB->savedb();
 868         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) was successfully imported: '.$import_count.' new links.");document.location=\'?\';</script>';
 869     }
 870     else
 871     {
 872         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
 873     }
 874 }
 875
 876 // -----------------------------------------------------------------------------------------------
 877 /* Template for the edit link form
 878     Input: $link : link to edit (assocative array item as returned by the LINKDB class)
 879 Output: An array : (string) : The html code of the edit link form.
 880                    (string) : The proper onload to use in body.
 881     Example: list($html,$onload)=templateEditForm($mylinkdb['20110805_124532']);
 882              echo $html;
 883 */
 884 function templateEditForm($link,$link_is_new=false)
 885 {
 886     $url=htmlspecialchars($link['url']);
 887     $title=htmlspecialchars($link['title']);
 888     $tags=htmlspecialchars($link['tags']);
 889     $description=htmlspecialchars($link['description']);
 890     $private = ($link['private']==0 ? '' : 'checked="yes"');
 891
 892     // Automatically focus on empty fields:
 893     $onload='onload="document.linkform.lf_tags.focus();"';
 894     if ($description=='') $onload='onload="document.linkform.lf_description.focus();"';
 895     if ($title=='') $onload='onload="document.linkform.lf_title.focus();"';
 896
 897     // Do not show "Delete" button if this is a new link.
 898     $delete_button = '<input type="submit" value="Delete" name="delete_link" class="bigbutton" style="margin-left:180px;" onClick="return confirmDeleteLink();">';
 899     if ($link_is_new) $delete_button='';
 900
 901     $token=getToken(); // XSRF protection.
 902     $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 903     $editlinkform=<<<HTML
 904 <div id="editlinkform">
 905     <form method="post" name="linkform">
 906         <input type="hidden" name="lf_linkdate" value="{$link['linkdate']}">
 907         <i>URL</i><br><input type="text" name="lf_url" value="{$url}" style="width:100%"><br>
 908         <i>Title</i><br><input type="text" name="lf_title" value="{$title}" style="width:100%"><br>
 909         <i>Description</i><br><textarea name="lf_description" rows="4" cols="25" style="width:100%">{$description}</textarea><br>
 910         <i>Tags</i><br><input type="text" name="lf_tags" value="{$tags}" style="width:100%"><br>
 911         <input type="checkbox" {$private} style="margin:7 0 10 0;" name="lf_private">&nbsp;<i>Private</i><br>
 912         <input type="submit" value="Save" name="save_edit" class="bigbutton" style="margin-left:40px;">
 913         <input type="submit" value="Cancel" name="cancel_edit" class="bigbutton" style="margin-left:40px;">
 914         {$delete_button}
 915         <input type="hidden" name="token" value="{$token}">
 916         {$returnurl_html}
 917     </form>
 918 </div>
 919 HTML;
 920     return array($editlinkform,$onload);
 921 }
 922
 923
 924 // -----------------------------------------------------------------------------------------------
 925 // Template for the list of links.
 926 // Returns html code to show the list of link according to parameters passed in URL (search terms, page...)
 927 function templateLinkList()
 928 {
 929     global $LINKSDB;
 930
 931     // Search according to entered search terms:
 932     $linksToDisplay=array();
 933     $searched='';
 934     if (!empty($_GET['searchterm'])) // Fulltext search
 935     {
 936         $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
 937         $searched='&nbsp;<b>'.count($linksToDisplay).' results for <i>'.htmlspecialchars($_GET['searchterm']).'</i></b>:';
 938     }
 939     elseif (!empty($_GET['searchtags'])) // Search by tag
 940     {
 941         $linksToDisplay = $LINKSDB->filterTags($_GET['searchtags']);
 942         $tagshtml=''; foreach(explode(' ',$_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> ';
 943         $searched='&nbsp;<b>'.count($linksToDisplay).' results for tags '.$tagshtml.':</b>';
 944     }
 945     else
 946         $linksToDisplay = $LINKSDB;  // otherwise, display without filtering.
 947
 948     $linklist='';
 949     $actions='';
 950
 951     // Handle paging.
 952     /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess ???
 953        "Warning: array_keys() expects parameter 1 to be array, object given in ... "
 954        If my class implements ArrayAccess, why won't array_keys() accept it ?  ( $keys=array_keys($linksToDisplay); )
 955     */
 956     $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks php.
 957     $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']);
 958     $pagecount = ($pagecount==0 ? 1 : $pagecount);
 959     $page=( empty($_GET['page']) ? 1 : intval($_GET['page']));
 960     $page = ( $page<1 ? 1 : $page );
 961     $page = ( $page>$pagecount ? $pagecount : $page );
 962     $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index.
 963     $end = $i+$_SESSION['LINKS_PER_PAGE'];
 964     while ($i<$end && $i<count($keys))
 965     {
 966         $link = $linksToDisplay[$keys[$i]];
 967         $description=$link['description'];
 968         $title=$link['title'];
 969         $classprivate = ($link['private']==0 ? '' : 'class="private"');
 970         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>';
 971         $tags='';
 972         if ($link['tags']!='') foreach(explode(' ',$link['tags']) as $tag) { $tags.='<span class="linktag" title="Add tag"><a href="?addtag='.htmlspecialchars($tag).'">'.htmlspecialchars($tag).'</a></span> '; }
 973         $linklist.='<li '.$classprivate.'><span class="linktitle"><a href="'.htmlspecialchars($link['url']).'">'.htmlspecialchars($title).'</a></span>'.$actions.'<br>';
 974         if ($description!='') $linklist.='<div class="linkdescription">'.nl2br(htmlspecialchars($description)).'</div><br>';
 975         $linklist.='<span class="linkdate">'.htmlspecialchars(linkdate2locale($link['linkdate'])).' - </span><span class="linkurl">'.htmlspecialchars($link['url']).'</span><br>'.$tags."</li>\n";
 976         $i++;
 977     }
 978
 979     // Show paging.
 980     $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
 981     $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
 982     $paging='';
 983     if ($i!=count($keys)) $paging.='<a href="?page='.($page+1).$searchterm.$searchtags.'">&#x25C4;Older</a>';
 984     $paging.= '<span style="color:#fff; padding:0 20 0 20;">page '.$page.' / '.$pagecount.'</span>';
 985     if ($page>1) $paging.='<a href="?page='.($page-1).$searchterm.$searchtags.'">Newer&#x25BA;</a>';
 986     $linksperpage = <<<HTML
 987 <div style="float:right; padding-right:5px;">
 988 Links per page: <a href="?linksperpage=20">20</a> <a href="?linksperpage=50">50</a> <a href="?linksperpage=100">100</a>
 989  <form method="GET" style="display:inline;"><input type="text" name="linksperpage" size="2" style="height:15px;"></form></div>
 990 HTML;
 991     $paging = '<div class="paging">'.$linksperpage.$paging.'</div>';
 992     $linklist='<div id="linklist">'.$paging.$searched.'<ul>'.$linklist.'</ul>'.$paging.'</div>';
 993     return $linklist;
 994 }
 995
 996 // -----------------------------------------------------------------------------------------------
 997 // Template for the whole page.
 998 /* Input: $data (associative array).
 999                 Keys: 'body' : body of HTML document
1000                       'pageheader' : html code to show in page header (top of page)
1001                       'onload' : optional onload javascript for the <body>
1002 */
1003 function templatePage($data)
1004 {
1005     global $STARTTIME;
1006     global $LINKSDB;
1007     $shaarli_version = shaarli_version;
1008     $linkcount = count($LINKSDB);
1009     $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>');
1010     foreach(array('pageheader','body','onload') as $k) // make sure all required fields exist (put an empty string if not).
1011     {
1012         if (!array_key_exists($k,$data)) $data[$k]='';
1013     }
1014     $feedurl=htmlspecialchars(serverUrl().$_SERVER['SCRIPT_NAME'].'?do=rss');
1015     echo <<<HTML
1016 <html>
1017 <head>
1018 <title>Shaarli - Let's shaare your links...</title>
1019 <link rel="alternate" type="application/rss+xml" href="{$feedurl}">
1020 <style type="text/css">
1021 <!--
1022 /* CSS Reset from Yahoo to cope with browsers CSS inconsistencies. */
1023 /*
1024 Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html
1025 version: 2.8.2r1
1026 */
1027 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%;}
1028
1029 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1030 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; }
1031 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; }
1032 /* I don't give a shit about IE. He can't understand selectors such as input[type='submit']. */
1033
1034 .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;}
1035 .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;}
1036 #pageheader
1037 {
1038 color:#eee;
1039 border-bottom: 1px solid #aaa;
1040 background-color: #6A6A6A;
1041 background-image: -webkit-gradient(linear, left top, left bottom, from(#6A6A6A), to(#303030)); /* Saf4+, Chrome */
1042 background-image: -webkit-linear-gradient(top, #6A6A6A, #303030); /* Chrome 10+, Saf5.1+ */
1043 background-image:    -moz-linear-gradient(top, #6A6A6A, #303030); /* FF3.6 */
1044 background-image:     -ms-linear-gradient(top, #6A6A6A, #303030); /* IE10 */
1045 background-image:      -o-linear-gradient(top, #6A6A6A, #303030); /* Opera 11.10+ */
1046 background-image:         linear-gradient(top, #6A6A6A, #303030);
1047 filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#6A6A6A', EndColorStr='#303030'); /* IE6-IE9 */
1048 padding-bottom: 5px;
1049 }
1050 #pageheader a:link { color:#bbb; text-decoration:none;}
1051 #pageheader a:visited { color:#bbb; text-decoration:none;}
1052 #pageheader a:hover { color:#FFFFC9; text-decoration:none;}
1053 #pageheader a:active { color:#bbb; text-decoration:none;}
1054 .paging { background-color:#777; color:#ccc; text-align:center; padding:0 0 3 0;}
1055 .paging a:link { color:#ccc; text-decoration:none;}
1056 .paging a:visited { color:#ccc;  }
1057 .paging a:hover {  color:#FFFFC9;  }
1058 .paging a:active { color:#fff;  }
1059 #headerform { padding:5 5 5 15;  }
1060 #editlinkform {  padding:5 5 5 15px; width:80%; }
1061 #linklist li { padding:4 10 8 20; border-bottom: 1px solid #bbb;}
1062 #linklist li.private { background-color: #ccc; border-left:8px solid #888; }
1063 .linktitle { font-size:14pt; font-weight:bold; }
1064 .linktitle a { text-decoration: none; color:#0000EE; }
1065 .linktitle a:hover { text-decoration: underline; }
1066 .linktitle a:visited { color:#0000BB; }
1067 .linkdate { font-size:8pt; color:#888; }
1068 .linkurl { font-size:8pt; color:#4BAA74; }
1069 .linkdescription { color:#000; margin-top:0px; margin-bottom:0px; font-weight:normal; }
1070 .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;
1071 border-bottom:1px solid #aaa; border-right:1px solid #aaa;  }
1072 .linktag a { color:#777; text-decoration:none;  }
1073 .buttoneditform { display:inline; }
1074 #footer { font-size:8pt; text-align:center; border-top:1px solid #ddd; color: #888; }
1075 -->
1076 </style>
1077 </head>
1078 <body {$data['onload']}>
1079 <div id="pageheader"><div style="float:right; font-style:italic; color:#bbb; text-align:right; padding:0 5 0 0;">Shaare your links...<br>{$linkcount} links</div>
1080     <b><i>Shaarli {$shaarli_version}</i></b> - <a href="?">Home</a>&nbsp;{$menu}&nbsp;<a href="{$feedurl}" style="padding-left:30px;">RSS Feed</a>
1081 {$data['pageheader']}
1082 </div>
1083 {$data['body']}
1084
1085 HTML;
1086     $exectime = round(microtime(true)-$STARTTIME,4);
1087     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 '.$exectime.' seconds&nbsp;?</div>';
1088     if (isLoggedIn()) echo '<script language="JavaScript">function confirmDeleteLink() { var agree=confirm("Are you sure you want to delete this link ?"); if (agree) return true ; else return false ; }</script>';
1089     echo '</body></html>';
1090 }
1091
1092 // -----------------------------------------------------------------------------------------------
1093 // Installation
1094 // This function should NEVER be called if the file data/config.php exists.
1095 function install()
1096 {
1097     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1098     {
1099         $tz=(empty($_POST['settimezone']) ? 'UTC':$_POST['settimezone']);
1100         // Everything is ok, let's create config file.
1101         $salt=sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
1102         $hash = sha1($_POST['setpassword'].$_POST['setlogin'].$salt);
1103         $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($tz,true).'); ?>';
1104         file_put_contents(CONFIG_FILE,$config);
1105         echo '<script language="JavaScript">alert("Shaarli is now configured. Please enter your login/password and start shaaring your links !");document.location=\'?do=login\';</script>';
1106         exit;
1107    }
1108     // Display config form:
1109     $timezoneselect='';
1110     if (function_exists('timezone_identifiers_list')) // because of old php version (5.1) which can be found on free.fr
1111     {
1112         $timezones='';
1113         foreach(timezone_identifiers_list() as $tz) $timezones.='<option value="'.htmlspecialchars($tz).'">'.htmlspecialchars($tz)."</option>\n";
1114         $timezoneselect='Timezone: <select name="settimezone"><option value="" selected>(please select:)</option>'.$timezones.'</select><br><br>';
1115     }
1116     echo <<<HTML
1117 <html><title>Shaarli - Configuration</title><style type="text/css">
1118 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1119 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; }
1120 .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;}
1121 </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>
1122 <form method="POST" action="" name="configform" style="border:1px solid black; padding:10 10 10 10;">
1123 Login: <input type="text" name="setlogin"><br><br>Password: <input type="password" name="setpassword"><br><br>
1124 {$timezoneselect}
1125 <input type="submit" name="Save" value="Save config" class="bigbutton"></form></body></html>
1126 HTML;
1127     exit;
1128 }
1129
1130 $LINKSDB=new linkdb(isLoggedIn());  // Read links from database (and filter private links if used it not logged in).
1131 if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=LINKS_PER_PAGE;
1132 if (startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
1133 renderPage();
1134 ?>