index.php

   1 <?php
   2 // Shaarli 0.0.9 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 checkphpversion();
  19
  20 // -----------------------------------------------------------------------------------------------
  21 // Program config (touch at your own risks !)
  22 error_reporting(E_ALL^E_WARNING);  // See all error except warnings.
  23 //error_reporting(-1); // See all errors (for debugging only)
  24 $STARTTIME = microtime(true);  // Measure page execution time.
  25 ob_start();
  26 // Prevent caching: (yes, it's ugly)
  27 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
  28 header("Cache-Control: no-store, no-cache, must-revalidate");
  29 header("Cache-Control: post-check=0, pre-check=0", false);
  30 header("Pragma: no-cache");
  31 define('shaarli_version','0.0.9 beta');
  32 if (!is_dir(DATADIR)) { mkdir(DATADIR,0705); chmod(DATADIR,0705); }
  33 if (!is_file(DATADIR.'/.htaccess')) { file_put_contents(DATADIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
  34 if (!is_file(CONFIG_FILE)) install();
  35 require CONFIG_FILE;  // Read login/password hash into $GLOBALS.
  36 ini_set('max_input_time','60');  // High execution time in case of problematic imports/exports.
  37 ini_set('memory_limit', '128M');  // Try to set max upload file size and read (May not work on some hosts).
  38 ini_set('post_max_size', '16M');
  39 ini_set('upload_max_filesize', '16M');
  40 define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
  41 define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
  42 autoLocale(); // Sniff browser language and set date format accordingly.
  43 header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
  44 $LINKSDB=false;
  45
  46 // Check php version
  47 function checkphpversion()
  48 {
  49     $ver=phpversion();
  50     if (preg_match('!(\d+)\.(\d+)\.(\d+)!',$ver,$matches)) // (because phpversion() sometimes returns strings like "5.2.4-2ubuntu5.2")
  51     {
  52         list($match,$major,$minor,$release) = $matches;
  53         if ($major>=5 && $minor>=1) return; // 5.1.x or higher is ok.
  54         die('Your server supports php '.$ver.'. Shaarli requires at last php 5.1, and thus cannot run. Sorry.');
  55     }
  56     // if cannot check php version... well, at your own risks.
  57 }
  58
  59 // -----------------------------------------------------------------------------------------------
  60 // Log to text file
  61 function logm($message)
  62 {
  63     if (!file_exists(DATADIR.'/log.txt')) {$logFile = fopen(DATADIR.'/log.txt','w'); }
  64     else { $logFile = fopen(DATADIR.'/log.txt','a'); }
  65     fwrite($logFile,strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n");
  66     fclose($logFile);
  67 }
  68
  69 // ------------------------------------------------------------------------------------------
  70 // Sniff browser language to display dates in the right format automatically.
  71 // (Note that is may not work on your server if the corresponding local is not installed.)
  72 function autoLocale()
  73 {
  74     $loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
  75     if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
  76     {   // (It's a bit crude, but it works very well. Prefered language is always presented first.)
  77         if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
  78     }
  79     setlocale(LC_TIME,$loc);  // LC_TIME = Set local for date/time format only.
  80 }
  81
  82 // ------------------------------------------------------------------------------------------
  83 // Session management
  84 define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
  85 ini_set('session.use_cookies', 1);       // Use cookies to store session.
  86 ini_set('session.use_only_cookies', 1);  // Force cookies for session (phpsessionID forbidden in URL)
  87 ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
  88 session_name('shaarli');
  89 session_start();
  90
  91 // Returns the IP address of the client (Used to prevent session cookie hijacking.)
  92 function allIPs()
  93 {
  94     $ip = $_SERVER["REMOTE_ADDR"];
  95     // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
  96     if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
  97     if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
  98     return $ip;
  99 }
 100
 101 // Check that user/password is correct.
 102 function check_auth($login,$password)
 103 {
 104     $hash = sha1($password.$login.$GLOBALS['salt']);
 105     if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
 106     {   // Login/password is correct.
 107         $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
 108         $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
 109         $_SESSION['username']=$login;
 110         $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
 111         logm('Login successful');
 112         return True;
 113     }
 114     logm('Login failed for user '.$login);
 115     return False;
 116 }
 117
 118 // Returns true if the user is logged in.
 119 function isLoggedIn()
 120 {
 121     // If session does not exist on server side, or IP address has changed, or session has expired, logout.
 122     if (empty($_SESSION['uid']) || $_SESSION['ip']!=allIPs() || time()>=$_SESSION['expires_on'])
 123     {
 124         logout();
 125         return false;
 126     }
 127     $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // User accessed a page : Update his/her session expiration date.
 128     return true;
 129 }
 130
 131 // Force logout.
 132 function logout() { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']);}
 133
 134
 135 // ------------------------------------------------------------------------------------------
 136 // Brute force protection system
 137 // Several consecutive failed logins will ban the IP address for 30 minutes.
 138 if (!is_file(IPBANS_FILENAME)) file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
 139 include IPBANS_FILENAME;
 140 // Signal a failed login. Will ban the IP if too many failures:
 141 function ban_loginFailed()
 142 {
 143     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 144     if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
 145     $gb['FAILURES'][$ip]++;
 146     if ($gb['FAILURES'][$ip]>(BAN_AFTER-1))
 147     {
 148         $gb['BANS'][$ip]=time()+BAN_DURATION;
 149         logm('IP address banned from login');
 150     }
 151     $GLOBALS['IPBANS'] = $gb;
 152     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 153 }
 154
 155 // Signals a successful login. Resets failed login counter.
 156 function ban_loginOk()
 157 {
 158     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 159     unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 160     $GLOBALS['IPBANS'] = $gb;
 161     file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 162 }
 163
 164 // Checks if the user CAN login. If 'true', the user can try to login.
 165 function ban_canLogin()
 166 {
 167     $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
 168     if (isset($gb['BANS'][$ip]))
 169     {
 170         // User is banned. Check if the ban has expired:
 171         if ($gb['BANS'][$ip]<=time())
 172         {   // Ban expired, user can try to login again.
 173             logm('Ban lifted.');
 174             unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
 175             file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
 176             return true; // Ban has expired, user can login.
 177         }
 178         return false; // User is banned.
 179     }
 180     return true; // User is not banned.
 181 }
 182
 183 // ------------------------------------------------------------------------------------------
 184 // Process login form: Check if login/password is correct.
 185 if (isset($_POST['login']))
 186 {
 187     if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
 188     if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
 189     {   // Login/password is ok.
 190         ban_loginOk();
 191         // Optional redirect after login:
 192         if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
 193         if (isset($_POST['returnurl'])) { header('Location: '.$_POST['returnurl']); exit; }
 194         header('Location: ?'); exit;
 195     }
 196     else
 197     {
 198         ban_loginFailed();
 199         echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login\';</script>'; // Redirect to login screen.
 200         exit;
 201     }
 202 }
 203
 204 // ------------------------------------------------------------------------------------------
 205 // Misc utility functions:
 206
 207 // Returns the server URL (including port and http/https), without path.
 208 // eg. "http://myserver.com:8080"
 209 // You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
 210 function serverUrl()
 211 {
 212         $serverport = ($_SERVER["SERVER_PORT"]!='80' ? ':'.$_SERVER["SERVER_PORT"] : '');
 213         return 'http'.(!empty($_SERVER['HTTPS'])?'s':'').'://'.$_SERVER["SERVER_NAME"].$serverport;
 214 }
 215
 216 // Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
 217 function return_bytes($val)
 218 {
 219     $val = trim($val); $last=strtolower($val[strlen($val)-1]);
 220     switch($last)
 221     {
 222         case 'g': $val *= 1024;
 223         case 'm': $val *= 1024;
 224         case 'k': $val *= 1024;
 225     }
 226     return $val;
 227 }
 228
 229 // Try to determine max file size for uploads (POST).
 230 // Returns an integer (in bytes)
 231 function getMaxFileSize()
 232 {
 233     $size1 = return_bytes(ini_get('post_max_size'));
 234     $size2 = return_bytes(ini_get('upload_max_filesize'));
 235     // Return the smaller of two:
 236     $maxsize = min($size1,$size2);
 237     // FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
 238     return $maxsize;
 239 }
 240
 241 // Tells if a string start with a substring or not.
 242 function startsWith($haystack,$needle,$case=true)
 243 {
 244     if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
 245     return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
 246 }
 247
 248 // Tells if a string ends with a substring or not.
 249 function endsWith($haystack,$needle,$case=true)
 250 {
 251     if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
 252     return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
 253 }
 254
 255 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
 256     (used to build the ADD_DATE attribute in Netscape-bookmarks file)
 257     PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
 258 function linkdate2timestamp($linkdate)
 259 {
 260     $Y=$M=$D=$h=$m=$s=0;
 261     $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
 262     return mktime($h,$m,$s,$M,$D,$Y);
 263 }
 264
 265 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
 266     (used to build the pubDate attribute in RSS feed.)  */
 267 function linkdate2rfc822($linkdate)
 268 {
 269     return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
 270 }
 271
 272 /*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
 273     (used to display link date on screen)
 274     The date format is automatically chose according to locale/languages sniffed from browser headers (see autoLocale()). */
 275 function linkdate2locale($linkdate)
 276 {
 277     return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
 278     // Note that if you use a local which is not installed on your webserver,
 279     // the date will not be displayed in the chosen locale, but probably in US notation.
 280 }
 281
 282 // Parse HTTP response headers and return an associative array.
 283 function http_parse_headers( $headers )
 284 {
 285     $res=array();
 286     foreach($headers as $header)
 287     {
 288         $i = strpos($header,': ');
 289         if ($i)
 290         {
 291             $key=substr($header,0,$i);
 292             $value=substr($header,$i+2,strlen($header)-$i-2);
 293             $res[$key]=$value;
 294         }
 295     }
 296     return $res;
 297 }
 298
 299 /* GET an URL.
 300    Input: $url : url to get (http://...)
 301           $timeout : Network timeout (will wait this many seconds for an anwser before giving up).
 302    Output: An array.  [0] = HTTP status message (eg. "HTTP/1.1 200 OK") or error message
 303                       [1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
 304                       [2] = data
 305     Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
 306              if (strpos($httpstatus,'200 OK'))
 307                  echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
 308              else
 309                  echo 'There was an error: '.htmlspecialchars($httpstatus)
 310 */
 311 function getHTTP($url,$timeout=30)
 312 {
 313     try
 314     {
 315         $options = array('http'=>array('method'=>'GET','timeout' => $timeout)); // Force network timeout
 316         $context = stream_context_create($options);
 317         $data=file_get_contents($url,false,$context,-1, 2000000); // We download at most 2 Mb from source.
 318         if (!$data) { $lasterror=error_get_last();  return array($lasterror['message'],array(),''); }
 319         $httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
 320         $responseHeaders=http_parse_headers($http_response_header);
 321         return array($httpStatus,$responseHeaders,$data);
 322     }
 323     catch (Exception $e)  // getHTTP *can* fail silentely (we don't care if the title cannot be fetched)
 324     {
 325         return array($e->getMessage(),'','');
 326     }
 327 }
 328
 329 // Extract title from an HTML document.
 330 // (Returns an empty string if not found.)
 331 function html_extract_title($html)
 332 {
 333   return preg_match('!<title>(.*?)</title>!i', $html, $matches) ? $matches[1] : '';
 334 }
 335
 336 // ------------------------------------------------------------------------------------------
 337 // Token management for XSRF protection
 338 // Token should be used in any form which acts on data (create,update,delete,import...).
 339 if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
 340
 341 // Returns a token.
 342 function getToken()
 343 {
 344     $rnd = sha1(uniqid('',true).'_'.mt_rand());  // We generate a random string.
 345     $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
 346     return $rnd;
 347 }
 348
 349 // Tells if a token is ok. Using this function will destroy the token.
 350 // true=token is ok.
 351 function tokenOk($token)
 352 {
 353     if (isset($_SESSION['tokens'][$token]))
 354     {
 355         unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
 356         return true; // Token is ok.
 357     }
 358     return false; // Wrong token, or already used.
 359 }
 360
 361 // ------------------------------------------------------------------------------------------
 362 /* Data storage for links.
 363    This object behaves like an associative array.
 364    Example:
 365       $mylinks = new linkdb();
 366       echo $mylinks['20110826_161819']['title'];
 367       foreach($mylinks as $link)
 368          echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
 369
 370    We implement 3 interfaces:
 371      - ArrayAccess so that this object behaves like an associative array.
 372      - Iterator so that this object can be used in foreach() loops.
 373      - Countable interface so that we can do a count() on this object.
 374 */
 375 class linkdb implements Iterator, Countable, ArrayAccess
 376
 377 {
 378     private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
 379     private $urls;  // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
 380     private $keys;  // List of linkdate keys (for the Iterator interface implementation)
 381     private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
 382     private $loggedin; // Is the used logged in ? (used to filter private links)
 383
 384     // Constructor:
 385     function __construct($isLoggedIn)
 386     // Input : $isLoggedIn : is the used logged in ?
 387     {
 388         $this->loggedin = $isLoggedIn;
 389         $this->checkdb(); // Make sure data file exists.
 390         $this->readdb();  // Then read it.
 391     }
 392
 393     // ---- Countable interface implementation
 394     public function count() { return count($this->links); }
 395
 396     // ---- ArrayAccess interface implementation
 397     public function offsetSet($offset, $value)
 398     {
 399         if (!$this->loggedin) die('You are not authorized to add a link.');
 400         if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
 401         if (empty($offset)) die('You must specify a key.');
 402         $this->links[$offset] = $value;
 403         $this->urls[$value['url']]=$offset;
 404     }
 405     public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
 406     public function offsetUnset($offset)
 407     {
 408         if (!$this->loggedin) die('You are not authorized to delete a link.');
 409         $url = $this->links[$offset]['url']; unset($this->urls[$url]);
 410         unset($this->links[$offset]);
 411     }
 412     public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
 413
 414     // ---- Iterator interface implementation
 415     function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
 416     function key() { return $this->keys[$this->position]; } // current key
 417     function current() { return $this->links[$this->keys[$this->position]]; } // current value
 418     function next() { ++$this->position; } // go to next item
 419     function valid() { return isset($this->keys[$this->position]); }    // Check if current position is valid.
 420
 421     // ---- Misc methods
 422     private function checkdb() // Check if db directory and file exists.
 423     {
 424         if (!file_exists(DATASTORE)) // Create a dummy database for example.
 425         {
 426              $this->links = array();
 427              $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');
 428              $this->links[$link['linkdate']] = $link;
 429              $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');
 430              $this->links[$link['linkdate']] = $link;
 431              file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
 432         }
 433     }
 434
 435     // Read database from disk to memory
 436     private function readdb()
 437     {
 438         // Read data
 439         $this->links=(file_exists(DATASTORE) ? unserialize(gzinflate(base64_decode(substr(file_get_contents(DATASTORE),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
 440
 441         // If user is not logged in, filter private links.
 442         if (!$this->loggedin)
 443         {
 444             $toremove=array();
 445             foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
 446             foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
 447         }
 448
 449         // Keep the list of the mapping URLs-->linkdate up-to-date.
 450         $this->urls=array();
 451         foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
 452     }
 453
 454     // Save database from memory to disk.
 455     public function savedb()
 456     {
 457         if (!$this->loggedin) die('You are not authorized to change the database.');
 458         file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
 459     }
 460
 461     // Returns the link for a given URL (if it exists). false it does not exist.
 462     public function getLinkFromUrl($url)
 463     {
 464         if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
 465         return false;
 466     }
 467
 468     // Case insentitive search among links (in url, title and description). Returns filtered list of links.
 469     // eg. print_r($mydb->filterTags('hollandais'));
 470     public function filterFulltext($searchterms)
 471     {
 472         // FIXME: explode(' ',$searchterms) and perform a AND search.
 473         // FIXME: accept double-quotes to search for a string "as is" ?
 474         $filtered=array();
 475         $s = strtolower($searchterms);
 476         foreach($this->links as $l)
 477         {
 478             $found=strpos(strtolower($l['title']),$s) || strpos(strtolower($l['description']),$s) || strpos(strtolower($l['url']),$s) || strpos(strtolower($l['tags']),$s);
 479             if ($found) $filtered[$l['linkdate']] = $l;
 480         }
 481         krsort($filtered);
 482         return $filtered;
 483     }
 484
 485     // Filter by tag.
 486     // You can specify one or more tags (tags can be separated by space or comma).
 487     // eg. print_r($mydb->filterTags('linux programming'));
 488     public function filterTags($tags)
 489     {
 490         $t = str_replace(',',' ',strtolower($tags));
 491         $searchtags=explode(' ',$t);
 492         $filtered=array();
 493         foreach($this->links as $l)
 494         {
 495             $linktags = explode(' ',strtolower($l['tags']));
 496             if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
 497                 $filtered[$l['linkdate']] = $l;
 498         }
 499         krsort($filtered);
 500         return $filtered;
 501
 502     }
 503 }
 504
 505 // ------------------------------------------------------------------------------------------
 506 // Ouput the last 50 links in RSS 2.0 format.
 507 function showRSS()
 508 {
 509     global $LINKSDB;
 510     header('Content-Type: application/xhtml+xml; charset=utf-8');
 511     $pageaddr=htmlspecialchars(serverUrl().$_SERVER["SCRIPT_NAME"]);
 512     echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
 513     echo '<channel><title>Shared links on '.$pageaddr.'</title><link>'.$pageaddr.'</link>';
 514     echo '<description>Shared links</description><language></language><copyright>'.$pageaddr.'</copyright>'."\n\n";
 515     $i=0;
 516     $keys=array(); foreach($LINKSDB as $key=>$value) { $keys[]=$key; }  // No, I can't use array_keys().
 517     while ($i<50 && $i<count($keys))
 518     {
 519         $link = $LINKSDB[$keys[$i]];
 520         $rfc822date = linkdate2rfc822($link['linkdate']);
 521         echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid>'.htmlspecialchars($link['url']).'</guid><link>'.htmlspecialchars($link['url']).'</link><pubDate>'.htmlspecialchars($rfc822date).'</pubDate>';
 522         echo '<description><![CDATA['.htmlspecialchars($link['description']).']]></description></item>'."\n";
 523         $i++;
 524     }
 525     echo '</channel></rss>';
 526     exit;
 527 }
 528
 529 // ------------------------------------------------------------------------------------------
 530 // Render HTML page:
 531 function renderPage()
 532 {
 533     global $STARTTIME;
 534     global $LINKSDB;
 535
 536     // Well... rendering the page would be 100x better with the excellent Smarty, but I don't want to tie this minimalist project to 100+ files.
 537     // So I use a custom templating system.
 538
 539     // -------- Display login form.
 540     if (startswith($_SERVER["QUERY_STRING"],'do=login'))
 541     {
 542         if (!ban_canLogin())
 543         {
 544             $loginform='<div id="headerform">You have been banned from login after too many failed attempts. Try later.</div>';
 545             $data = array('pageheader'=>$loginform,'body'=>'','onload'=>'');
 546             templatePage($data);
 547             exit;
 548         }
 549         $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 550         $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login">&nbsp;&nbsp;&nbsp;Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
 551         $onload = 'onload="document.loginform.login.focus();"';
 552         $data = array('pageheader'=>$loginform,'body'=>'','onload'=>$onload);
 553         templatePage($data);
 554         exit;
 555     }
 556
 557     // -------- User wants to logout.
 558     if (startswith($_SERVER["QUERY_STRING"],'do=logout'))
 559     {
 560         logout();
 561         header('Location: ?');
 562         exit;
 563     }
 564
 565     // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
 566     if (isset($_GET['addtag']))
 567     {
 568         // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
 569         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
 570         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 571         $params['searchtags'] = (empty($params['searchtags']) ?  trim($_GET['addtag']) : trim($params['searchtags'].' '.urlencode($_GET['addtag'])));
 572         unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 573         header('Location: ?'.http_build_query($params));
 574         exit;
 575     }
 576
 577     // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
 578     if (isset($_GET['removetag']))
 579     {
 580         // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
 581         if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER
 582         parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
 583         if (isset($params['searchtags']))
 584         {
 585             $tags = explode(' ',$params['searchtags']);
 586             $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags.
 587             if (count($tags)==0) unset($params['searchtags']); else $params['searchtags'] = implode(' ',$tags);
 588             unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
 589         }
 590         header('Location: ?'.http_build_query($params));
 591         exit;
 592     }
 593
 594     // -------- User wants to change the number of links per page (linksperpage=...)
 595     if (isset($_GET['linksperpage']))
 596     {
 597         if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); }
 598         header('Location: '.(empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']));
 599         exit;
 600     }
 601
 602
 603     // -------- Handle other actions allowed for non-logged in users:
 604     if (!isLoggedIn())
 605     {
 606         // User tries to post new link but is not loggedin:
 607         // Show login screen, then redirect to ?post=...
 608         if (isset($_GET['post']))
 609         {
 610             header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
 611             exit;
 612         }
 613
 614         // Show search form and display list of links.
 615         $searchform=<<<HTML
 616 <div id="headerform" style="width:100%; white-space:nowrap;";>
 617     <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>
 618     <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>
 619 </div>
 620 HTML;
 621         $onload = 'document.searchform.searchterm.focus();';
 622         $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 623         templatePage($data);
 624         exit; // Never remove this one !
 625     }
 626
 627     // -------- All other functions are reserved for the registered user:
 628
 629     // -------- Display the Tools menu if requested (import/export/bookmarklet...)
 630     if (startswith($_SERVER["QUERY_STRING"],'do=tools'))
 631     {
 632         $pageabsaddr=serverUrl().$_SERVER["SCRIPT_NAME"]; // Why doesn't php have a built-in function for that ?
 633         // The javascript code for the bookmarklet:
 634         $toolbar= <<<HTML
 635 <div id="headerform">
 636     <a href="?do=import"><b>Import</b></a> - <small>Import Netscape html bookmarks (as exported from Firefox, Chrome, Opera, delicious...)</small><br>
 637     <a href="?do=export"><b>Export</b></a> - <small>Export Netscape html bookmarks (which can be imported in Firefox, Chrome, Opera, delicious...)</small><br>
 638     <a class="smallbutton" style="color:black;" onclick="alert('Drag this link to your bookmarks toolbar, or right-click it and choose Bookmark This Link...');return false;" href="javascript:javascript:(function(){var%20url%20=%20location.href;var%20title%20=%20document.title%20||%20url;window.open('{$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>
 639 </div>
 640 HTML;
 641         $data = array('pageheader'=>$toolbar,'body'=>'','onload'=>'');
 642         templatePage($data);
 643         exit;
 644     }
 645
 646     // -------- User wants to add a link without using the bookmarklet: show form.
 647     if (startswith($_SERVER["QUERY_STRING"],'do=addlink'))
 648     {
 649         $onload = 'document.addform.post.focus();';
 650         $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>';
 651         $data = array('pageheader'=>$addform,'body'=>'','onload'=>$onload);
 652         templatePage($data);
 653         exit;
 654     }
 655
 656     // -------- User clicked the "Save" button when editing a link: Save link to database.
 657     if (isset($_POST['save_edit']))
 658     {
 659         if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
 660         $linkdate=$_POST['lf_linkdate'];
 661         $link = array('title'=>trim($_POST['lf_title']),'url'=>trim($_POST['lf_url']),'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
 662                       'linkdate'=>$linkdate,'tags'=>trim($_POST['lf_tags']));
 663         if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
 664         $LINKSDB[$linkdate] = $link;
 665         $LINKSDB->savedb(); // save to disk
 666
 667         // If we are called from the bookmarklet, we must close the popup:
 668         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 669         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 670         header('Location: '.$returnurl); // After saving the link, redirect to the page the user was on.
 671         exit;
 672     }
 673
 674     // -------- User clicked the "Cancel" button when editing a link.
 675     if (isset($_POST['cancel_edit']))
 676     {
 677         // If we are called from the bookmarklet, we must close the popup;
 678         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 679         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 680         header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
 681         exit;
 682     }
 683
 684     // -------- User clicked the "Delete" button when editing a link : Delete link from database.
 685     if (isset($_POST['delete_link']))
 686     {
 687         if (!tokenOk($_POST['token'])) die('Wrong token.');
 688         // We do not need to ask for confirmation:
 689         // - confirmation is handled by javascript
 690         // - we are protected from XSRF by the token.
 691         $linkdate=$_POST['lf_linkdate'];
 692         unset($LINKSDB[$linkdate]);
 693         $LINKSDB->savedb(); // save to disk
 694         // If we are called from the bookmarklet, we must close the popup:
 695         if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
 696         $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
 697         header('Location: '.$returnurl); // After deleting the link, redirect to the page the user was on.
 698         exit;
 699     }
 700
 701     // -------- User clicked the "EDIT" button on a link: Display link edit form.
 702     if (isset($_GET['edit_link']))
 703     {
 704         $link = $LINKSDB[$_GET['edit_link']];  // Read database
 705         if (!$link) { header('Location: ?'); exit; } // Link not found in database.
 706         list($editform,$onload)=templateEditForm($link);
 707         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 708         templatePage($data);
 709         exit;
 710     }
 711
 712     // -------- User want to post a new link: Display link edit form.
 713     if (isset($_GET['post']))
 714     {
 715         $url=$_GET['post'];
 716
 717         // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
 718         $i=strpos($url,'&utm_source='); if ($i) $url=substr($url,0,$i);
 719         $i=strpos($url,'?utm_source='); if ($i) $url=substr($url,0,$i);
 720
 721         $link_is_new = false;
 722         $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link)
 723         if (!$link)
 724         {
 725             $link_is_new = true;  // This is a new link
 726             $linkdate = strval(date('Ymd_His'));
 727             $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet).
 728             $description=''; $tags=''; $private=0;
 729             if (parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url;
 730             // 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.)
 731             if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http')
 732             {
 733                 list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive.
 734                 // FIXME: Decode charset according to charset specified in either 1) HTTP response headers or 2) <head> in html
 735                 if (strpos($status,'200 OK')) $title=html_extract_title($data);
 736             }
 737             $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>0);
 738         }
 739         list($editform,$onload)=templateEditForm($link,$link_is_new);
 740         $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload);
 741         templatePage($data);
 742         exit;
 743     }
 744
 745     // -------- Export as Netscape Bookmarks HTML file.
 746     if (startswith($_SERVER["QUERY_STRING"],'do=export'))
 747     {
 748         header('Content-Type: text/html; charset=utf-8');
 749         header('Content-disposition: attachment; filename=bookmarks_'.strval(date('Ymd_His')).'.html');
 750         echo <<<HTML
 751 <!DOCTYPE NETSCAPE-Bookmark-file-1>
 752 <!-- This is an automatically generated file.
 753      It will be read and overwritten.
 754      DO NOT EDIT! -->
 755 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
 756 <TITLE>Bookmarks</TITLE>
 757 <H1>Bookmarks</H1>
 758 HTML;
 759         foreach($LINKSDB as $link)
 760         {
 761             echo '<DT><A HREF="'.htmlspecialchars($link['url']).'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
 762             if ($link['tags']!='') echo ' TAGS="'.htmlspecialchars(str_replace(' ',',',$link['tags'])).'"';
 763             echo '>'.htmlspecialchars($link['title'])."</A>\n";
 764             if ($link['description']!='') echo '<DD>'.htmlspecialchars($link['description'])."\n";
 765         }
 766         echo '<!-- Shaarli bookmarks export on '.date('Y/m/d H:i:s')."-->\n";
 767         exit;
 768     }
 769
 770     // -------- User is uploading a file for import
 771     if (startswith($_SERVER["QUERY_STRING"],'do=upload'))
 772     {
 773         // If file is too big, some form field may be missing.
 774         if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
 775         {
 776             $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
 777             echo '<script language="JavaScript">alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.htmlspecialchars($returnurl).'\';</script>';
 778             exit;
 779         }
 780         if (!tokenOk($_POST['token'])) die('Wrong token.');
 781         importFile();
 782         exit;
 783     }
 784
 785     // -------- Show upload/import dialog:
 786     if (startswith($_SERVER["QUERY_STRING"],'do=import'))
 787     {
 788         $token = getToken();
 789         $maxfilesize=getMaxFileSize();
 790         $onload = 'onload="document.uploadform.filetoupload.focus();"';
 791         $uploadform=<<<HTML
 792 <div id="headerform">
 793 Import Netscape html bookmarks (as exported from Firefox/Chrome/Opera/delicious/diigo...) (Max: {$maxfilesize} bytes).
 794 <form method="POST" action="?do=upload" enctype="multipart/form-data" name="uploadform">
 795     <input type="hidden" name="token" value="{$token}">
 796     <input type="file" name="filetoupload" size="80">
 797     <input type="hidden" name="MAX_FILE_SIZE" value="{$maxfilesize}">
 798     <input type="submit" name="import_file" value="Import" class="bigbutton">
 799 </form>
 800 </div>
 801 HTML;
 802         $data = array('pageheader'=>$uploadform,'body'=>'','onload'=>$onload  );
 803         templatePage($data);
 804         exit;
 805     }
 806
 807     // -------- Otherwise, simply display search form and links:
 808     $searchform=<<<HTML
 809 <div id="headerform" style="width:100%; white-space:nowrap;";>
 810     <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>
 811     <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>
 812 </div>
 813 HTML;
 814     $onload = 'document.searchform.searchterm.focus();';
 815     $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload);
 816     templatePage($data);
 817     exit;
 818 }
 819
 820 // -----------------------------------------------------------------------------------------------
 821 // Process the import file form.
 822 function importFile()
 823 {
 824     global $LINKSDB;
 825     $filename=$_FILES['filetoupload']['name'];
 826     $filesize=$_FILES['filetoupload']['size'];
 827     $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
 828
 829     // Sniff file type:
 830     $type='unknown';
 831     if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
 832
 833     // Then import the bookmarks.
 834     if ($type=='netscape')
 835     {
 836         // This is a standard Netscape-style bookmark file.
 837         // This format is supported by all browsers (except IE, of course), also delicious, diigo and others.
 838         // I didn't want to use DOM... anyway, this is FAST (less than 1 second to import 7200 links (2.1 Mb html file)).
 839         $before=count($LINKSDB);
 840         foreach(explode('<DT>',$data) as $html) // explode is very fast
 841         {
 842             $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);
 843             $d = explode('<DD>',$html);
 844             if (startswith($d[0],'<A '))
 845             {
 846                 $link['description'] = (isset($d[1]) ? trim($d[1]) : '');  // Get description (optional)
 847                 preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : '');  // Get title
 848                 preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER);  // Get all other attributes
 849                 foreach($matches as $m)
 850                 {
 851                     $attr=$m[1]; $value=$m[2];
 852                     if ($attr=='HREF') $link['url']=$value;
 853                     elseif ($attr=='ADD_DATE') $link['linkdate']=date('Ymd_His',intval($value));
 854                     elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
 855                     elseif ($attr=='TAGS') $link['tags']=str_replace(',',' ',$value);
 856                 }
 857                 if ($link['linkdate']!='' && $link['url']!='')  $LINKSDB[$link['linkdate']] = $link;
 858             }
 859         }
 860         $import_count = count($LINKSDB)-$before;
 861         $LINKSDB->savedb();
 862         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) was successfully imported: '.$import_count.' new links.");document.location=\'?\';</script>';
 863     }
 864     else
 865     {
 866         echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
 867     }
 868 }
 869
 870 // -----------------------------------------------------------------------------------------------
 871 /* Template for the edit link form
 872     Input: $link : link to edit (assocative array item as returned by the LINKDB class)
 873 Output: An array : (string) : The html code of the edit link form.
 874                    (string) : The proper onload to use in body.
 875     Example: list($html,$onload)=templateEditForm($mylinkdb['20110805_124532']);
 876              echo $html;
 877 */
 878 function templateEditForm($link,$link_is_new=false)
 879 {
 880     $url=htmlspecialchars($link['url']);
 881     $title=htmlspecialchars($link['title']);
 882     $tags=htmlspecialchars($link['tags']);
 883     $description=htmlspecialchars($link['description']);
 884     $private = ($link['private']==0 ? '' : 'checked="yes"');
 885
 886     // Automatically focus on empty fields:
 887     $onload='onload="document.linkform.lf_tags.focus();"';
 888     if ($description=='') $onload='onload="document.linkform.lf_description.focus();"';
 889     if ($title=='') $onload='onload="document.linkform.lf_title.focus();"';
 890
 891     // Do not show "Delete" button if this is a new link.
 892     $delete_button = '<input type="submit" value="Delete" name="delete_link" class="bigbutton" style="margin-left:180px;" onClick="return confirmDeleteLink();">';
 893     if ($link_is_new) $delete_button='';
 894
 895     $token=getToken(); // XSRF protection.
 896     $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
 897     $editlinkform=<<<HTML
 898 <div id="editlinkform">
 899     <form method="post" name="linkform">
 900         <input type="hidden" name="lf_linkdate" value="{$link['linkdate']}">
 901         <i>URL</i><br><input type="text" name="lf_url" value="{$url}" style="width:100%"><br>
 902         <i>Title</i><br><input type="text" name="lf_title" value="{$title}" style="width:100%"><br>
 903         <i>Description</i><br><textarea name="lf_description" rows="4" cols="25" style="width:100%">{$description}</textarea><br>
 904         <i>Tags</i><br><input type="text" name="lf_tags" value="{$tags}" style="width:100%"><br>
 905         <input type="checkbox" {$private} style="margin:7 0 10 0;" name="lf_private">&nbsp;<i>Private</i><br>
 906         <input type="submit" value="Save" name="save_edit" class="bigbutton" style="margin-left:40px;">
 907         <input type="submit" value="Cancel" name="cancel_edit" class="bigbutton" style="margin-left:40px;">
 908         {$delete_button}
 909         <input type="hidden" name="token" value="{$token}">
 910         {$returnurl_html}
 911     </form>
 912 </div>
 913 HTML;
 914     return array($editlinkform,$onload);
 915 }
 916
 917
 918 // -----------------------------------------------------------------------------------------------
 919 // Template for the list of links.
 920 // Returns html code to show the list of link according to parameters passed in URL (search terms, page...)
 921 function templateLinkList()
 922 {
 923     global $LINKSDB;
 924
 925     // Search according to entered search terms:
 926     $linksToDisplay=array();
 927     $searched='';
 928     if (!empty($_GET['searchterm'])) // Fulltext search
 929     {
 930         $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
 931         $searched='&nbsp;<b>'.count($linksToDisplay).' results for <i>'.htmlspecialchars($_GET['searchterm']).'</i></b>:';
 932     }
 933     elseif (!empty($_GET['searchtags'])) // Search by tag
 934     {
 935         $linksToDisplay = $LINKSDB->filterTags($_GET['searchtags']);
 936         $tagshtml=''; foreach(explode(' ',$_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> ';
 937         $searched='&nbsp;<b>'.count($linksToDisplay).' results for tags '.$tagshtml.':</b>';
 938     }
 939     else
 940         $linksToDisplay = $LINKSDB;  // otherwise, display without filtering.
 941
 942     $linklist='';
 943     $actions='';
 944
 945     // Handle paging.
 946     /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess ???
 947        "Warning: array_keys() expects parameter 1 to be array, object given in ... "
 948        If my class implements ArrayAccess, why won't array_keys() accept it ?  ( $keys=array_keys($linksToDisplay); )
 949     */
 950     $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks php.
 951     $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']);
 952     $pagecount = ($pagecount==0 ? 1 : $pagecount);
 953     $page=( empty($_GET['page']) ? 1 : intval($_GET['page']));
 954     $page = ( $page<1 ? 1 : $page );
 955     $page = ( $page>$pagecount ? $pagecount : $page );
 956     $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index.
 957     $end = $i+$_SESSION['LINKS_PER_PAGE'];
 958     while ($i<$end && $i<count($keys))
 959     {
 960         $link = $linksToDisplay[$keys[$i]];
 961         $description=$link['description'];
 962         $title=$link['title'];
 963         $classprivate = ($link['private']==0 ? '' : 'class="private"');
 964         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>';
 965         $tags='';
 966         if ($link['tags']!='') foreach(explode(' ',$link['tags']) as $tag) { $tags.='<span class="linktag" title="Add tag"><a href="?addtag='.htmlspecialchars($tag).'">'.htmlspecialchars($tag).'</a></span> '; }
 967         $linklist.='<li '.$classprivate.'><span class="linktitle"><a href="'.htmlspecialchars($link['url']).'">'.htmlspecialchars($title).'</a></span>'.$actions.'<br>';
 968         if ($description!='') $linklist.='<div class="linkdescription">'.nl2br(htmlspecialchars($description)).'</div><br>';
 969         $linklist.='<span class="linkdate">'.htmlspecialchars(linkdate2locale($link['linkdate'])).' - </span><span class="linkurl">'.htmlspecialchars($link['url']).'</span><br>'.$tags."</li>\n";
 970         $i++;
 971     }
 972
 973     // Show paging.
 974     $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
 975     $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
 976     $paging='';
 977     if ($i!=count($keys)) $paging.='<a href="?page='.($page+1).$searchterm.$searchtags.'">&#x25C4;Older</a>';
 978     $paging.= '<span style="color:#fff; padding:0 20 0 20;">page '.$page.' / '.$pagecount.'</span>';
 979     if ($page>1) $paging.='<a href="?page='.($page-1).$searchterm.$searchtags.'">Newer&#x25BA;</a>';
 980     $linksperpage = <<<HTML
 981 <div style="float:right; padding-right:5px;">
 982 Links per page: <a href="?linksperpage=20">20</a> <a href="?linksperpage=50">50</a> <a href="?linksperpage=100">100</a>
 983  <form method="GET" style="display:inline;"><input type="text" name="linksperpage" size="2" style="height:15px;"></form></div>
 984 HTML;
 985     $paging = '<div class="paging">'.$linksperpage.$paging.'</div>';
 986     $linklist='<div id="linklist">'.$paging.$searched.'<ul>'.$linklist.'</ul>'.$paging.'</div>';
 987     return $linklist;
 988 }
 989
 990 // -----------------------------------------------------------------------------------------------
 991 // Template for the whole page.
 992 /* Input: $data (associative array).
 993                 Keys: 'body' : body of HTML document
 994                       'pageheader' : html code to show in page header (top of page)
 995                       'onload' : optional onload javascript for the <body>
 996 */
 997 function templatePage($data)
 998 {
 999     global $STARTTIME;
1000     global $LINKSDB;
1001     $shaarli_version = shaarli_version;
1002     $linkcount = count($LINKSDB);
1003     $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>');
1004     foreach(array('pageheader','body','onload') as $k) // make sure all required fields exist (put an empty string if not).
1005     {
1006         if (!array_key_exists($k,$data)) $data[$k]='';
1007     }
1008     $feedurl=htmlspecialchars(serverUrl().$_SERVER['SCRIPT_NAME'].'?do=rss');
1009     echo <<<HTML
1010 <html>
1011 <head>
1012 <title>Shaarli - Let's shaare your links...</title>
1013 <link rel="alternate" type="application/rss+xml" href="{$feedurl}">
1014 <style type="text/css">
1015 <!--
1016 /* CSS Reset from Yahoo to cope with browsers CSS inconsistencies. */
1017 /*
1018 Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html
1019 version: 2.8.2r1
1020 */
1021 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%;}
1022
1023 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1024 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; }
1025 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; }
1026 /* I don't give a shit about IE. He can't understand selectors such as input[type='submit']. */
1027
1028 .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;}
1029 .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;}
1030 #pageheader
1031 {
1032 color:#eee;
1033 border-bottom: 1px solid #aaa;
1034 background-color: #6A6A6A;
1035 background-image: -webkit-gradient(linear, left top, left bottom, from(#6A6A6A), to(#303030)); /* Saf4+, Chrome */
1036 background-image: -webkit-linear-gradient(top, #6A6A6A, #303030); /* Chrome 10+, Saf5.1+ */
1037 background-image:    -moz-linear-gradient(top, #6A6A6A, #303030); /* FF3.6 */
1038 background-image:     -ms-linear-gradient(top, #6A6A6A, #303030); /* IE10 */
1039 background-image:      -o-linear-gradient(top, #6A6A6A, #303030); /* Opera 11.10+ */
1040 background-image:         linear-gradient(top, #6A6A6A, #303030);
1041 filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#6A6A6A', EndColorStr='#303030'); /* IE6-IE9 */
1042 padding-bottom: 5px;
1043 }
1044 #pageheader a:link { color:#bbb; text-decoration:none;}
1045 #pageheader a:visited { color:#bbb; text-decoration:none;}
1046 #pageheader a:hover { color:#FFFFC9; text-decoration:none;}
1047 #pageheader a:active { color:#bbb; text-decoration:none;}
1048 .paging { background-color:#777; color:#ccc; text-align:center; padding:0 0 3 0;}
1049 .paging a:link { color:#ccc; text-decoration:none;}
1050 .paging a:visited { color:#ccc;  }
1051 .paging a:hover {  color:#FFFFC9;  }
1052 .paging a:active { color:#fff;  }
1053 #headerform { padding:5 5 5 15;  }
1054 #editlinkform {  padding:5 5 5 15px; width:80%; }
1055 #linklist li { padding:4 10 8 20; border-bottom: 1px solid #bbb;}
1056 #linklist li.private { background-color: #ccc; border-left:8px solid #888; }
1057 .linktitle { font-size:14pt; font-weight:bold; }
1058 .linktitle a { text-decoration: none; color:#0000EE; }
1059 .linktitle a:hover { text-decoration: underline; }
1060 .linktitle a:visited { color:#0000BB; }
1061 .linkdate { font-size:8pt; color:#888; }
1062 .linkurl { font-size:8pt; color:#4BAA74; }
1063 .linkdescription { color:#000; margin-top:0px; margin-bottom:0px; font-weight:normal; }
1064 .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;
1065 border-bottom:1px solid #aaa; border-right:1px solid #aaa;  }
1066 .linktag a { color:#777; text-decoration:none;  }
1067 .buttoneditform { display:inline; }
1068 #footer { font-size:8pt; text-align:center; border-top:1px solid #ddd; color: #888; }
1069 -->
1070 </style>
1071 </head>
1072 <body {$data['onload']}>
1073 <div id="pageheader"><div style="float:right; font-style:italic; color:#bbb; text-align:right; padding:0 5 0 0;">Shaare your links...<br>{$linkcount} links</div>
1074     <b><i>Shaarli {$shaarli_version}</i></b> - <a href="?">Home</a>&nbsp;{$menu}&nbsp;<a href="{$feedurl}" style="padding-left:30px;">RSS Feed</a>
1075 {$data['pageheader']}
1076 </div>
1077 {$data['body']}
1078
1079 HTML;
1080     $exectime = round(microtime(true)-$STARTTIME,4);
1081     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 '.$exectime.' seconds&nbsp;?</div>';
1082     if (isLoggedIn()) echo '<script language="JavaScript">function confirmDeleteLink() { var agree=confirm("Are you sure you want to delete this link ?"); if (agree) return true ; else return false ; }</script>';
1083     echo '</body></html>';
1084 }
1085
1086 // -----------------------------------------------------------------------------------------------
1087 // Installation
1088 // This function should NEVER be called if the file data/config.php exists.
1089 function install()
1090 {
1091     if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
1092     {
1093         $tz=(empty($_POST['settimezone']) ? 'UTC':$_POST['settimezone']);
1094         // Everything is ok, let's create config file.
1095         $salt=sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
1096         $hash = sha1($_POST['setpassword'].$_POST['setlogin'].$salt);
1097         $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($tz,true).'); ?>';
1098         file_put_contents(CONFIG_FILE,$config);
1099         echo '<script language="JavaScript">alert("Shaarli is now configured. Please enter your login/password and start shaaring your links !");document.location=\'?do=login\';</script>';
1100         exit;
1101    }
1102     // Display config form:
1103     $timezoneselect='';
1104     if (function_exists('timezone_identifiers_list')) // because of old php version (5.1) which can be found on free.fr
1105     {
1106         $timezones='';
1107         foreach(timezone_identifiers_list() as $tz) $timezones.='<option value="'.htmlspecialchars($tz).'">'.htmlspecialchars($tz)."</option>\n";
1108         $timezoneselect='Timezone: <select name="settimezone"><option value="" selected>(please select:)</option>'.$timezones.'</select><br><br>';
1109     }
1110     echo <<<HTML
1111 <html><title>Shaarli - Configuration</title><style type="text/css">
1112 body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; }
1113 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; }
1114 .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;}
1115 </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>
1116 <form method="POST" action="" name="configform" style="border:1px solid black; padding:10 10 10 10;">
1117 Login: <input type="text" name="setlogin"><br><br>Password: <input type="password" name="setpassword"><br><br>
1118 {$timezoneselect}
1119 <input type="submit" name="Save" value="Save config" class="bigbutton"></form></body></html>
1120 HTML;
1121     exit;
1122 }
1123
1124 $LINKSDB=new linkdb(isLoggedIn());  // Read links from database (and filter private links if used it not logged in).
1125 if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=LINKS_PER_PAGE;
1126 if (startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
1127 renderPage();
1128 ?>