Version 0.0.7 beta

1 files changed, 1102 insertions, 0 deletions

diff --git a/index.php b/index.php
new file mode 100644
index 00000000..3b6869f0
--- /dev/null
+++ b/index.php
@@ -0,0 +1,1102 @@
+<?php
+// Shaarli 0.0.7 beta - Shaare your links...
+// The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net
+// http://sebsauvage.net/wiki/doku.php?id=php:shaarli
+// Licence: http://www.opensource.org/licenses/zlib-license.php
+
+// Requires: php 5.2.x
+
+// -----------------------------------------------------------------------------------------------
+// User config:
+define('DATADIR','data'); // Data subdirectory
+define('CONFIG_FILE',DATADIR.'/config.php'); // Configuration file (user login/password)
+define('DATASTORE',DATADIR.'/datastore.php'); // Data storage file.
+define('LINKS_PER_PAGE',20); // Default links per page.
+define('IPBANS_FILENAME',DATADIR.'/ipbans.php'); // File storage for failures and bans.
+define('BAN_AFTER',4);       // Ban IP after this many failures.
+define('BAN_DURATION',1800); // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes)
+
+// -----------------------------------------------------------------------------------------------
+// Program config (touch at your own risks !)
+//error_reporting(E_ALL^E_WARNING);  // See all error except warnings.
+error_reporting(-1); // See all errors (for debugging only)
+$STARTTIME = microtime(true);  // Measure page execution time.
+ob_start();
+// Prevent caching: (yes, it's ugly)
+header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
+header("Cache-Control: no-store, no-cache, must-revalidate");
+header("Cache-Control: post-check=0, pre-check=0", false);
+header("Pragma: no-cache");
+define('shaarli_version','0.0.7 beta');
+if (!is_dir(DATADIR)) { mkdir(DATADIR,0705); chmod(DATADIR,0705); }
+if (!is_file(DATADIR.'/.htaccess')) { file_put_contents(DATADIR.'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.    
+if (!is_file(CONFIG_FILE)) install();
+require CONFIG_FILE;  // Read login/password hash into $GLOBALS.
+ini_set('max_input_time','60');  // High execution time in case of problematic imports/exports.
+ini_set('memory_limit', '128M');  // Try to set max upload file size and read (May not work on some hosts).
+ini_set('post_max_size', '16M');
+ini_set('upload_max_filesize', '16M');
+define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
+define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
+autoLocale(); // Sniff browser language and set date format accordingly.
+header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
+$LINKSDB=false;
+
+// -----------------------------------------------------------------------------------------------
+// Log to text file
+function logm($message)
+{
+    if (!file_exists(DATADIR.'/log.txt')) {$logFile = fopen(DATADIR.'/log.txt','w'); }
+    else { $logFile = fopen(DATADIR.'/log.txt','a'); }
+    fwrite($logFile,strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n");
+    fclose($logFile);
+}
+
+// ------------------------------------------------------------------------------------------
+// Sniff browser language to display dates in the right format automatically.
+// (Note that is may not work on your server if the corresponding local is not installed.)
+function autoLocale()
+{     
+    $loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
+    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
+    {   // (It's a bit crude, but it works very well. Prefered language is always presented first.)
+        if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
+    }
+    setlocale(LC_TIME,$loc);  // LC_TIME = Set local for date/time format only.
+}
+
+// ------------------------------------------------------------------------------------------
+// Session management
+define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
+ini_set('session.use_cookies', 1);       // Use cookies to store session.
+ini_set('session.use_only_cookies', 1);  // Force cookies for session (phpsessionID forbidden in URL)
+ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
+session_name('shaarli');
+session_start();
+
+// Returns the IP address of the client (Used to prevent session cookie hijacking.)
+function allIPs()
+{
+    $ip = $_SERVER["REMOTE_ADDR"];
+    // Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
+    if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
+    if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
+    return $ip;
+}
+
+// Check that user/password is correct.
+function check_auth($login,$password) 
+{
+    $hash = sha1($password.$login.$GLOBALS['salt']);
+    if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
+    {   // Login/password is correct.
+        $_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
+        $_SESSION['ip']=allIPs();                // We store IP address(es) of the client to make sure session is not hijacked.
+        $_SESSION['username']=$login;
+        $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // Set session expiration.
+        logm('Login successful');
+        return True;
+    }
+    logm('Login failed for user '.$login);
+    return False;
+}
+
+// Returns true if the user is logged in.
+function isLoggedIn()
+{ 
+    // If session does not exist on server side, or IP address has changed, or session has expired, logout.
+    if (empty($_SESSION['uid']) || $_SESSION['ip']!=allIPs() || time()>=$_SESSION['expires_on'])
+    {
+        logout();
+        return false;
+    }
+    $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT;  // User accessed a page : Update his/her session expiration date.
+    return true;
+}
+
+// Force logout.
+function logout() { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']);}
+
+
+// ------------------------------------------------------------------------------------------
+// Brute force protection system
+// Several consecutive failed logins will ban the IP address for 30 minutes.
+if (!is_file(IPBANS_FILENAME)) file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
+include IPBANS_FILENAME;
+// Signal a failed login. Will ban the IP if too many failures:
+function ban_loginFailed()
+{
+    $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
+    if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
+    $gb['FAILURES'][$ip]++;
+    if ($gb['FAILURES'][$ip]>(BAN_AFTER-1))
+    {
+        $gb['BANS'][$ip]=time()+BAN_DURATION;
+        logm('IP address banned from login');
+    }
+    $GLOBALS['IPBANS'] = $gb;
+    file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
+}
+
+// Signals a successful login. Resets failed login counter.
+function ban_loginOk()
+{
+    $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
+    unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
+    $GLOBALS['IPBANS'] = $gb;
+    file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
+}
+
+// Checks if the user CAN login. If 'true', the user can try to login.
+function ban_canLogin()
+{
+    $ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
+    if (isset($gb['BANS'][$ip]))
+    {
+        // User is banned. Check if the ban has expired:
+        if ($gb['BANS'][$ip]<=time())  
+        {   // Ban expired, user can try to login again.
+            logm('Ban lifted.');
+            unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
+            file_put_contents(IPBANS_FILENAME, "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
+            return true; // Ban has expired, user can login.
+        }
+        return false; // User is banned.
+    }
+    return true; // User is not banned.
+}
+
+// ------------------------------------------------------------------------------------------
+// Process login form: Check if login/password is correct.
+if (isset($_POST['login']))
+{
+    if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
+    if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
+    {   // Login/password is ok.
+        ban_loginOk();
+        // Optional redirect after login:
+        if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
+        if (isset($_POST['returnurl'])) { header('Location: '.$_POST['returnurl']); exit; }
+        header('Location: ?'); exit;
+    }
+    else
+    {
+        ban_loginFailed(); 
+        echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login\';</script>'; // Redirect to login screen.
+        exit;   
+    }
+} 
+
+// ------------------------------------------------------------------------------------------
+// Misc utility functions:
+
+// Returns the server URL (including port and http/https), without path.
+// eg. "http://myserver.com:8080"
+// You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
+function serverUrl()
+{
+        $serverport = ($_SERVER["SERVER_PORT"]!='80' ? ':'.$_SERVER["SERVER_PORT"] : ''); 
+        return 'http'.(!empty($_SERVER['HTTPS'])?'s':'').'://'.$_SERVER["SERVER_NAME"].$serverport;
+}
+
+// Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
+function return_bytes($val) 
+{
+    $val = trim($val); $last=strtolower($val[strlen($val)-1]);
+    switch($last) 
+    {
+        case 'g': $val *= 1024;
+        case 'm': $val *= 1024;
+        case 'k': $val *= 1024;
+    }
+    return $val;
+}
+
+// Try to determine max file size for uploads (POST).
+// Returns an integer (in bytes)
+function getMaxFileSize()
+{
+    $size1 = return_bytes(ini_get('post_max_size'));
+    $size2 = return_bytes(ini_get('upload_max_filesize'));
+    // Return the smaller of two:
+    $maxsize = min($size1,$size2);
+    // FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
+    return $maxsize;
+}
+
+// Tells if a string start with a substring or not.
+function startsWith($haystack,$needle,$case=true)
+{
+    if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
+    return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
+}
+
+// Tells if a string ends with a substring or not.
+function endsWith($haystack,$needle,$case=true)
+{
+    if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
+    return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
+}
+
+/*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
+    (used to build the ADD_DATE attribute in Netscape-bookmarks file)
+    PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
+function linkdate2timestamp($linkdate)
+{
+    $Y=$M=$D=$h=$m=$s=0;
+    $r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
+    return mktime($h,$m,$s,$M,$D,$Y);
+}
+
+/*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
+    (used to build the pubDate attribute in RSS feed.)  */
+function linkdate2rfc822($linkdate)
+{
+    return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
+}
+
+/*  Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
+    (used to display link date on screen)
+    The date format is automatically chose according to locale/languages sniffed from browser headers (see autoLocale()). */
+function linkdate2locale($linkdate)
+{
+    return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
+    // Note that if you use a local which is not installed on your webserver,
+    // the date will not be displayed in the chosen locale, but probably in US notation.
+}
+
+// Parse HTTP response headers and return an associative array.
+function http_parse_headers( $headers ) 
+{
+    $res=array();
+    foreach($headers as $header)
+    {
+        $i = strpos($header,': ');
+        if ($i)
+        {
+            $key=substr($header,0,$i);
+            $value=substr($header,$i+2,strlen($header)-$i-2);
+            $res[$key]=$value;
+        }
+    }
+    return $res;
+}
+
+/* GET an URL.
+   Input: $url : url to get (http://...)
+          $timeout : Network timeout (will wait this many seconds for an anwser before giving up).
+   Output: An array.  [0] = HTTP status message (eg. "HTTP/1.1 200 OK")
+                      [1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
+                      [2] = data
+    Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
+             if (strpos($httpstatus,'200 OK'))
+                 echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
+             else
+                 echo 'There was an error: '.htmlspecialchars($httpstatus)
+*/
+function getHTTP($url,$timeout=30)
+{
+    //FIXME: trap error correctly (unresolved host, unsupported protocol, etc.)
+    $options = array('http'=>array('method'=>'GET','timeout' => $timeout)); // Force network timeout
+    $context = stream_context_create($options);
+    $data=file_get_contents($url,false,$context,-1, 2000000); // We download at most 2 Mb from source.
+    if (!$data) { $lasterror=error_get_last();  return array($lasterror['message'],array(),''); }
+    $httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
+    $responseHeaders=http_parse_headers($http_response_header);
+    return array($httpStatus,$responseHeaders,$data);
+}
+
+// Extract title from an HTML document.
+// (Returns an empty string if not found.)
+function html_extract_title($html) 
+{
+  return preg_match('!<title>(.*?)</title>!i', $html, $matches) ? $matches[1] : '';
+}
+
+// ------------------------------------------------------------------------------------------
+// Token management for XSRF protection
+// Token should be used in any form which acts on data (create,update,delete,import...).
+if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array();  // Token are attached to the session.
+
+// Returns a token.
+function getToken()
+{
+    $rnd = sha1(uniqid('',true).'_'.mt_rand());  // We generate a random string.
+    $_SESSION['tokens'][$rnd]=1;  // Store it on the server side.
+    return $rnd;    
+}
+
+// Tells if a token is ok. Using this function will destroy the token.
+// true=token is ok. 
+function tokenOk($token)
+{
+    if (isset($_SESSION['tokens'][$token]))
+    {
+        unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
+        return true; // Token is ok.
+    }
+    return false; // Wrong token, or already used.
+}
+
+// ------------------------------------------------------------------------------------------
+/* Data storage for links.
+   This object behaves like an associative array.
+   Example:
+      $mylinks = new linkdb();
+      echo $mylinks['20110826_161819']['title'];
+      foreach($mylinks as $link)
+         echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
+   
+   We implement 3 interfaces:
+     - ArrayAccess so that this object behaves like an associative array.
+     - Iterator so that this object can be used in foreach() loops.
+     - Countable interface so that we can do a count() on this object.
+*/
+class linkdb implements Iterator, Countable, ArrayAccess
+
+{
+    private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
+    private $urls;  // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
+    private $keys;  // List of linkdate keys (for the Iterator interface implementation)
+    private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
+    private $loggedin; // Is the used logged in ? (used to filter private links)
+
+    // Constructor:
+    function __construct($isLoggedIn)
+    // Input : $isLoggedIn : is the used logged in ?
+    {
+        $this->loggedin = $isLoggedIn;
+        $this->checkdb(); // Make sure data file exists.
+        $this->readdb();  // Then read it.
+    } 
+    
+    // ---- Countable interface implementation
+    public function count() { return count($this->links); }
+
+    // ---- ArrayAccess interface implementation
+    public function offsetSet($offset, $value)
+    {
+        if (!$this->loggedin) die('You are not authorized to add a link.');
+        if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
+        if (empty($offset)) die('You must specify a key.');
+        $this->links[$offset] = $value;
+        $this->urls[$value['url']]=$offset;    
+    }
+    public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
+    public function offsetUnset($offset)
+    { 
+        if (!$this->loggedin) die('You are not authorized to delete a link.');
+        $url = $this->links[$offset]['url']; unset($this->urls[$url]);    
+        unset($this->links[$offset]); 
+    }
+    public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
+    
+    // ---- Iterator interface implementation
+    function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
+    function key() { return $this->keys[$this->position]; } // current key
+    function current() { return $this->links[$this->keys[$this->position]]; } // current value
+    function next() { ++$this->position; } // go to next item
+    function valid() { return isset($this->keys[$this->position]); }    // Check if current position is valid.
+
+    // ---- Misc methods
+    private function checkdb() // Check if db directory and file exists.
+    {
+        if (!file_exists(DATASTORE)) // Create a dummy database for example.
+        {
+             $this->links = array();
+             $link = array('title'=>'Shaarli - sebsauvage.net','url'=>'http://sebsauvage.net/wiki/doku.php?id=php:shaarli','description'=>'Welcome to Shaarli ! This is a bookmark. To edit or delete me, you must first login.','private'=>0,'linkdate'=>'20110914_190000','tags'=>'opensource software');
+             $this->links[$link['linkdate']] = $link;
+             $link = array('title'=>'My secret stuff... - Pastebin.com','url'=>'http://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');
+             $this->links[$link['linkdate']] = $link;             
+             file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
+        }    
+    }
+    
+    // Read database from disk to memory
+    private function readdb() 
+    {
+        // Read data
+        $this->links=(file_exists(DATASTORE) ? unserialize(gzinflate(base64_decode(substr(file_get_contents(DATASTORE),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
+        
+        // If user is not logged in, filter private links.
+        if (!$this->loggedin)
+        {
+            $toremove=array();
+            foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
+            foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
+        }
+        
+        // Keep the list of the mapping URLs-->linkdate up-to-date.
+        $this->urls=array();
+        foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
+    }
+
+    // Save database from memory to disk.    
+    public function savedb() 
+    {
+        if (!$this->loggedin) die('You are not authorized to change the database.');
+        file_put_contents(DATASTORE, PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
+    }
+    
+    // Returns the link for a given URL (if it exists). false it does not exist.
+    public function getLinkFromUrl($url) 
+    {
+        if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
+        return false;
+    }
+
+    // Case insentitive search among links (in url, title and description). Returns filtered list of links.
+    // eg. print_r($mydb->filterTags('hollandais'));
+    public function filterFulltext($searchterms)  
+    {
+        // FIXME: explode(' ',$searchterms) and perform a AND search.
+        // FIXME: accept double-quotes to search for a string "as is" ?
+        $filtered=array();
+        $s = strtolower($searchterms);
+        foreach($this->links as $l)
+        { 
+            $found=strpos(strtolower($l['title']),$s) || strpos(strtolower($l['description']),$s) || strpos(strtolower($l['url']),$s) || strpos(strtolower($l['tags']),$s);
+            if ($found) $filtered[$l['linkdate']] = $l;
+        }
+        krsort($filtered);
+        return $filtered;
+    }
+    
+    // Filter by tag.
+    // You can specify one or more tags (tags can be separated by space or comma).
+    // eg. print_r($mydb->filterTags('linux programming'));
+    public function filterTags($tags)
+    {
+        $t = str_replace(',',' ',strtolower($tags));
+        $searchtags=explode(' ',$t);
+        $filtered=array();
+        foreach($this->links as $l)
+        { 
+            $linktags = explode(' ',strtolower($l['tags']));
+            if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
+                $filtered[$l['linkdate']] = $l;
+        }
+        krsort($filtered);
+        return $filtered;
+
+    }      
+}
+
+// ------------------------------------------------------------------------------------------
+// Ouput the last 50 links in RSS 2.0 format.
+function showRSS()
+{
+    global $LINKSDB;
+    header('Content-Type: application/xhtml+xml; charset=utf-8');
+    $pageaddr=htmlspecialchars(serverUrl().$_SERVER["SCRIPT_NAME"]);
+    echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
+    echo '<channel><title>Shared links on '.$pageaddr.'</title><link>'.$pageaddr.'</link>';
+    echo '<description>Shared links</description><language></language><copyright>'.$pageaddr.'</copyright>'."\n\n";
+    $i=0;
+    $keys=array(); foreach($LINKSDB as $key=>$value) { $keys[]=$key; }  // No, I can't use array_keys().
+    while ($i<50 && $i<count($keys))
+    {
+        $link = $LINKSDB[$keys[$i]];
+        $rfc822date = linkdate2rfc822($link['linkdate']);
+        echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid>'.$pageaddr.'?'.htmlspecialchars($link['linkdate']).'</guid><link>'.htmlspecialchars($link['url']).'</link><pubDate>'.htmlspecialchars($rfc822date).'</pubDate>';
+        echo '<description><![CDATA['.htmlspecialchars($link['description']).']]></description></item>'."\n";      
+        $i++;
+    }
+    echo '</channel></rss>';
+    exit;
+}
+
+// ------------------------------------------------------------------------------------------
+// Render HTML page:
+function renderPage()
+{
+    global $STARTTIME;
+    global $LINKSDB;
+    
+    // Well... rendering the page would be 100x better with the excellent Smarty, but I don't want to tie this minimalist project to 100+ files.
+    // So I use a custom templating system.
+    
+    // -------- Display login form.
+    if (startswith($_SERVER["QUERY_STRING"],'do=login'))
+    {
+        if (!ban_canLogin())
+        { 
+            $loginform='<div id="headerform">You have been banned from login after too many failed attempts. Try later.</div>';
+            $data = array('pageheader'=>$loginform,'body'=>'','onload'=>''); 
+            templatePage($data);
+            exit;
+        }
+        $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');        
+        $loginform='<div id="headerform"><form method="post" name="loginform">Login: <input type="text" name="login">&nbsp;&nbsp;&nbsp;Password : <input type="password" name="password"> <input type="submit" value="Login" class="bigbutton"><input type="hidden" name="token" value="'.getToken().'">'.$returnurl_html.'</form></div>';
+        $onload = 'onload="document.loginform.login.focus();"';
+        $data = array('pageheader'=>$loginform,'body'=>'','onload'=>$onload); 
+        templatePage($data);
+        exit;
+    }
+    
+    // -------- User wants to logout.
+    if (startswith($_SERVER["QUERY_STRING"],'do=logout'))
+    { 
+        logout(); 
+        header('Location: ?'); 
+        exit; 
+    }    
+    
+    // -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
+    if (isset($_GET['addtag']))
+    {
+        // Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
+        parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
+        $params['searchtags'] = (empty($params['searchtags']) ?  trim($_GET['addtag']) : trim($params['searchtags'].' '.$_GET['addtag']));
+        unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
+        header('Location: ?'.http_build_query($params));
+        exit;
+    }
+
+    // -------- User clicks on a tag in result count: Remove the tag from the list of searched tags (searchtags=...)
+    if (isset($_GET['removetag']))
+    {
+        // Get previous URL (http_referer) and remove the tag from the searchtags parameters in query.
+        parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
+        if (isset($params['searchtags']))
+        {
+            $tags = explode(' ',$params['searchtags']);
+            $tags=array_diff($tags, array($_GET['removetag'])); // Remove value from array $tags.
+            if (count($tags)==0) unset($params['searchtags']); else $params['searchtags'] = implode(' ',$tags);
+            unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
+        }
+        header('Location: ?'.http_build_query($params));
+        exit;
+    }    
+    
+    // -------- User wants to change the number of links per page (linksperpage=...)
+    if (isset($_GET['linksperpage']))
+    {
+        if (is_numeric($_GET['linksperpage'])) { $_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage'])); }
+        header('Location: '.$_SERVER['HTTP_REFERER']);
+        exit;
+    }
+    
+    
+    // -------- Handle other actions allowed for non-logged in users:
+    if (!isLoggedIn())
+    {
+        // User tries to post new link but is not loggedin:
+        // Show login screen, then redirect to ?post=...
+        if (isset($_GET['post'])) 
+        {
+            header('Location: ?do=login&post='.urlencode($_GET['post']).(isset($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
+            exit;
+        }
+        
+        // Show search form and display list of links.
+        $searchform=<<<HTML
+<div id="headerform" style="width:100%; white-space:nowrap;";>
+    <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>
+    <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>
+</div>
+HTML;
+        $onload = 'document.searchform.searchterm.focus();';
+        $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload); 
+        templatePage($data);
+        exit; // Never remove this one !
+    }
+    
+    // -------- All other functions are reserved for the registered user:
+    
+    // -------- Display the Tools menu if requested (import/export/bookmarklet...)
+    if (startswith($_SERVER["QUERY_STRING"],'do=tools'))
+    {
+        $pageabsaddr=serverUrl().$_SERVER["SCRIPT_NAME"]; // Why doesn't php have a built-in function for that ?
+        // The javascript code for the bookmarklet:
+        $toolbar= <<<HTML
+<div id="headerform">
+    <a href="?do=import"><b>Import</b></a> - <small>Import Netscape html bookmarks (as exported from Firefox, Chrome, Opera, delicious...)</small><br> 
+    <a href="?do=export"><b>Export</b></a> - <small>Export Netscape html bookmarks (which can be imported in Firefox, Chrome, Opera, delicious...)</small><br>
+    <a class="smallbutton" style="color:black;" onclick="alert('Drag this link to your bookmarks toolbar, or right-click it and choose Bookmark This Link...');return false;" href="javascript:javascript:(function(){var%20url%20=%20location.href;var%20title%20=%20document.title%20||%20url;window.open('{$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>
+</div>
+HTML;
+        $data = array('pageheader'=>$toolbar,'body'=>'','onload'=>''); 
+        templatePage($data);
+        exit;
+    }
+    
+    // -------- User wants to add a link without using the bookmarklet: show form.
+    if (startswith($_SERVER["QUERY_STRING"],'do=addlink'))
+    {
+        $onload = 'document.addform.post.focus();';
+        $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>';
+        $data = array('pageheader'=>$addform,'body'=>'','onload'=>$onload); 
+        templatePage($data);
+        exit;
+    }    
+    
+    // -------- User clicked the "Save" button when editing a link: Save link to database.
+    if (isset($_POST['save_edit']))
+    {
+        if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
+        $linkdate=$_POST['lf_linkdate'];
+        $link = array('title'=>trim($_POST['lf_title']),'url'=>trim($_POST['lf_url']),'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
+                      'linkdate'=>$linkdate,'tags'=>trim($_POST['lf_tags']));        
+        if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
+        $LINKSDB[$linkdate] = $link;
+        $LINKSDB->savedb(); // save to disk
+        
+        // If we are called from the bookmarklet, we must close the popup:
+        if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
+        header('Location: '.$_POST['returnurl']); // After saving the link, redirect to the page the user was on.
+        exit;
+    } 
+    
+    // -------- User clicked the "Cancel" button when editing a link.
+    if (isset($_POST['cancel_edit']))
+    {
+        // If we are called from the bookmarklet, we must close the popup;
+        if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
+        $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
+        header('Location: '.$returnurl); // After canceling, redirect to the page the user was on.
+        exit;    
+    }
+
+    // -------- User clicked the "Delete" button when editing a link : Delete link from database.
+    if (isset($_POST['delete_link']))
+    {
+        if (!tokenOk($_POST['token'])) die('Wrong token.');
+        // We do not need to ask for confirmation:
+        // - confirmation is handled by javascript
+        // - we are protected from XSRF by the token.
+        $linkdate=$_POST['lf_linkdate'];
+        unset($LINKSDB[$linkdate]);
+        $LINKSDB->savedb(); // save to disk
+        // If we are called from the bookmarklet, we must close the popup:
+        if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
+        $returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
+        header('Location: '.$returnurl); // After deleting the link, redirect to the page the user was on.
+        exit;
+    }    
+    
+    // -------- User clicked the "EDIT" button on a link: Display link edit form.
+    if (isset($_GET['edit_link']))  
+    {
+        $link = $LINKSDB[$_GET['edit_link']];  // Read database
+        if (!$link) { header('Location: ?'); exit; } // Link not found in database.
+        list($editform,$onload)=templateEditForm($link);
+        $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload); 
+        templatePage($data);    
+        exit;       
+    }
+    
+    // -------- User want to post a new link: Display link edit form.
+    if (isset($_GET['post']))
+    {
+        $url=$_GET['post'];
+
+        // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
+        $i=strpos($url,'&utm_source='); if ($i) $url=substr($url,0,$i);
+        $i=strpos($url,'?utm_source='); if ($i) $url=substr($url,0,$i);
+        
+        $link_is_new = false;
+        $link = $LINKSDB->getLinkFromUrl($url); // Check if URL is not already in database (in this case, we will edit the existing link)
+        if (!$link) 
+        {
+            $link_is_new = true;  // This is a new link
+            $linkdate = strval(date('Ymd_His'));
+            $title = (empty($_GET['title']) ? '' : $_GET['title'] ); // Get title if it was provided in URL (by the bookmarklet).
+            $description=''; $tags=''; $private=0;
+            if (parse_url($url,PHP_URL_SCHEME)=='') $url = 'http://'.$url;                
+            // 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.)
+            if (empty($title) && parse_url($url,PHP_URL_SCHEME)=='http')
+            {
+                list($status,$headers,$data) = getHTTP($url,4); // Short timeout to keep the application responsive.
+                // FIXME: Decode charset according to charset specified in either 1) HTTP response headers or 2) <head> in html 
+                if (strpos($status,'200 OK')) $title=html_extract_title($data);
+            }
+            $link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>0); 
+        }
+        list($editform,$onload)=templateEditForm($link,$link_is_new); 
+        $data = array('pageheader'=>$editform,'body'=>'','onload'=>$onload); 
+        templatePage($data);    
+        exit;
+    }
+    
+    // -------- Export as Netscape Bookmarks HTML file.
+    if (startswith($_SERVER["QUERY_STRING"],'do=export'))
+    {    
+        header('Content-Type: text/html; charset=utf-8');
+        header('Content-disposition: attachment; filename=bookmarks_'.strval(date('Ymd_His')).'.html');
+        echo <<<HTML
+<!DOCTYPE NETSCAPE-Bookmark-file-1>
+<!-- This is an automatically generated file.
+     It will be read and overwritten.
+     DO NOT EDIT! -->
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+<TITLE>Bookmarks</TITLE>
+<H1>Bookmarks</H1>
+HTML;
+        foreach($LINKSDB as $link)
+        {
+            echo '<DT><A HREF="'.htmlspecialchars($link['url']).'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
+            if ($link['tags']!='') echo ' TAGS="'.htmlspecialchars(str_replace(' ',',',$link['tags'])).'"';
+            echo '>'.htmlspecialchars($link['title'])."</A>\n";
+            if ($link['description']!='') echo '<DD>'.htmlspecialchars($link['description'])."\n";
+        }
+        echo '<!-- Shaarli bookmarks export on '.date('Y/m/d H:i:s')."-->\n";
+        exit;
+    }            
+
+    // -------- User is uploading a file for import
+    if (startswith($_SERVER["QUERY_STRING"],'do=upload'))
+    {
+        // If file is too big, some form field may be missing.
+        if (!isset($_POST['token']) || (!isset($_FILES)) || (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size']==0))
+        {
+            $returnurl = ( empty($_SERVER['HTTP_REFERER']) ? '?' : $_SERVER['HTTP_REFERER'] );
+            echo '<script language="JavaScript">alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.htmlspecialchars($returnurl).'\';</script>';
+            exit;
+        }         
+        if (!tokenOk($_POST['token'])) die('Wrong token.');
+        importFile();
+        exit;
+    }     
+    
+    // -------- Show upload/import dialog:
+    if (startswith($_SERVER["QUERY_STRING"],'do=import'))
+    {    
+        $token = getToken();
+        $maxfilesize=getMaxFileSize();
+        $onload = 'onload="document.uploadform.filetoupload.focus();"';
+        $uploadform=<<<HTML
+<div id="headerform">
+Import Netscape html bookmarks (as exported from Firefox/Chrome/Opera/delicious/diigo...) (Max: {$maxfilesize} bytes).
+<form method="POST" action="?do=upload" enctype="multipart/form-data" name="uploadform">
+    <input type="hidden" name="token" value="{$token}">        
+    <input type="file" name="filetoupload" size="80">
+    <input type="hidden" name="MAX_FILE_SIZE" value="{$maxfilesize}">
+    <input type="submit" name="import_file" value="Import" class="bigbutton">   
+</form>
+</div>
+HTML;
+        $data = array('pageheader'=>$uploadform,'body'=>'','onload'=>$onload  ); 
+        templatePage($data);
+        exit;
+    }    
+
+    // -------- Otherwise, simply display search form and links:
+    $searchform=<<<HTML
+<div id="headerform" style="width:100%; white-space:nowrap;";>
+    <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>
+    <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>
+</div>
+HTML;
+    $onload = 'document.searchform.searchterm.focus();';
+    $data = array('pageheader'=>$searchform,'body'=>templateLinkList(),'onload'=>$onload); 
+    templatePage($data);
+    exit;
+}    
+
+// -----------------------------------------------------------------------------------------------
+// Process the import file form.
+function importFile()
+{
+    global $LINKSDB;
+    $filename=$_FILES['filetoupload']['name'];
+    $filesize=$_FILES['filetoupload']['size'];    
+    $data=file_get_contents($_FILES['filetoupload']['tmp_name']);
+
+    // Sniff file type:
+    $type='unknown';
+    if (startsWith($data,'<!DOCTYPE NETSCAPE-Bookmark-file-1>')) $type='netscape'; // Netscape bookmark file (aka Firefox).
+    
+    // Then import the bookmarks.
+    if ($type=='netscape')
+    {
+        // This is a standard Netscape-style bookmark file.
+        // This format is supported by all browsers (except IE, of course), also delicious, diigo and others.      
+        // I didn't want to use DOM... anyway, this is FAST (less than 1 second to import 7200 links (2.1 Mb html file)).
+        $before=count($LINKSDB); 
+        foreach(explode('<DT>',$data) as $html) // explode is very fast
+        {
+            $link = array('linkdate'=>'','title'=>'','url'=>'','description'=>'','tags'=>'','private'=>0);  
+            $d = explode('<DD>',$html);
+            if (startswith($d[0],'<A '))
+            {
+                $link['description'] = (isset($d[1]) ? trim($d[1]) : '');  // Get description (optional)
+                preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : '');  // Get title
+                preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER);  // Get all other attributes
+                foreach($matches as $m)
+                {
+                    $attr=$m[1]; $value=$m[2];
+                    if ($attr=='HREF') $link['url']=$value;
+                    elseif ($attr=='ADD_DATE') $link['linkdate']=date('Ymd_His',intval($value));
+                    elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
+                    elseif ($attr=='TAGS') $link['tags']=str_replace(',',' ',$value);
+                }     
+                if ($link['linkdate']!='' && $link['url']!='')  $LINKSDB[$link['linkdate']] = $link;
+            }     
+        }
+        $import_count = count($LINKSDB)-$before;
+        $LINKSDB->savedb();
+        echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) was successfully imported: '.$import_count.' new links.");document.location=\'?\';</script>';            
+    }
+    else
+    {
+        echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
+    }
+}    
+
+// -----------------------------------------------------------------------------------------------
+/* Template for the edit link form
+    Input: $link : link to edit (assocative array item as returned by the LINKDB class)
+Output: An array : (string) : The html code of the edit link form.
+                   (string) : The proper onload to use in body.
+    Example: list($html,$onload)=templateEditForm($mylinkdb['20110805_124532']);
+             echo $html;
+*/
+function templateEditForm($link,$link_is_new=false)
+{
+    $url=htmlspecialchars($link['url']);
+    $title=htmlspecialchars($link['title']);
+    $tags=htmlspecialchars($link['tags']);
+    $description=htmlspecialchars($link['description']);    
+    $private = ($link['private']==0 ? '' : 'checked="yes"');   
+    
+    // Automatically focus on empty fields:
+    $onload='onload="document.linkform.lf_tags.focus();"';
+    if ($description=='') $onload='onload="document.linkform.lf_description.focus();"';
+    if ($title=='') $onload='onload="document.linkform.lf_title.focus();"';    
+    
+    // Do not show "Delete" button if this is a new link.
+    $delete_button = '<input type="submit" value="Delete" name="delete_link" class="bigbutton" style="margin-left:180px;" onClick="return confirmDeleteLink();">';
+    if ($link_is_new) $delete_button='';
+    
+    $token=getToken(); // XSRF protection. 
+    $returnurl_html = (isset($_SERVER['HTTP_REFERER']) ? '<input type="hidden" name="returnurl" value="'.htmlspecialchars($_SERVER['HTTP_REFERER']).'">' : '');
+    $editlinkform=<<<HTML
+<div id="editlinkform">
+    <form method="post" name="linkform">
+        <input type="hidden" name="lf_linkdate" value="{$link['linkdate']}">
+        <i>URL</i><br><input type="text" name="lf_url" value="{$url}" style="width:100%"><br>
+        <i>Title</i><br><input type="text" name="lf_title" value="{$title}" style="width:100%"><br>
+        <i>Description</i><br><textarea name="lf_description" rows="4" cols="25" style="width:100%">{$description}</textarea><br>
+        <i>Tags</i><br><input type="text" name="lf_tags" value="{$tags}" style="width:100%"><br>
+        <input type="checkbox" {$private} style="margin:7 0 10 0;" name="lf_private">&nbsp;<i>Private</i><br>
+        <input type="submit" value="Save" name="save_edit" class="bigbutton" style="margin-left:40px;">
+        <input type="submit" value="Cancel" name="cancel_edit" class="bigbutton" style="margin-left:40px;">
+        {$delete_button}
+        <input type="hidden" name="token" value="{$token}">
+        {$returnurl_html}
+    </form>
+</div>    
+HTML;
+    return array($editlinkform,$onload);
+}        
+
+
+// -----------------------------------------------------------------------------------------------
+// Template for the list of links.
+// Returns html code to show the list of link according to parameters passed in URL (search terms, page...)
+function templateLinkList()
+{     
+    global $LINKSDB;
+    
+    // Search according to entered search terms:
+    $linksToDisplay=array();
+    $searched='';
+    if (!empty($_GET['searchterm'])) // Fulltext search
+    {
+        $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
+        $searched='&nbsp;<b>'.count($linksToDisplay).' results for <i>'.htmlspecialchars($_GET['searchterm']).'</i></b>:';
+    }
+    elseif (!empty($_GET['searchtags'])) // Search by tag
+    {
+        $linksToDisplay = $LINKSDB->filterTags($_GET['searchtags']);
+        $tagshtml=''; foreach(explode(' ',$_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> ';
+        $searched='&nbsp;<b>'.count($linksToDisplay).' results for tags '.$tagshtml.':</b>';    
+    }
+    else
+        $linksToDisplay = $LINKSDB;  // otherwise, display without filtering.
+   
+    $linklist='';
+    $actions='';
+    
+    // Handle paging.
+    /* Can someone explain to me why you get the following error when using array_keys() on an object which implements the interface ArrayAccess ???
+       "Warning: array_keys() expects parameter 1 to be array, object given in ... "
+       If my class implements ArrayAccess, why won't array_keys() accept it ?  ( $keys=array_keys($linksToDisplay); )
+    */
+    $keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // Stupid and ugly. Thanks php.
+    $pagecount = ceil(count($keys)/$_SESSION['LINKS_PER_PAGE']);
+    $pagecount = ($pagecount==0 ? 1 : $pagecount);
+    $page=( empty($_GET['page']) ? 1 : intval($_GET['page']));
+    $page = ( $page<1 ? 1 : $page );
+    $page = ( $page>$pagecount ? $pagecount : $page );
+    $i = ($page-1)*$_SESSION['LINKS_PER_PAGE']; // Start index.
+    $end = $i+$_SESSION['LINKS_PER_PAGE'];    
+    while ($i<$end && $i<count($keys))
+    {  
+        $link = $linksToDisplay[$keys[$i]];
+        $description=$link['description'];
+        $title=$link['title'];
+        $classprivate = ($link['private']==0 ? '' : 'class="private"');
+        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>';
+        $tags='';
+        if ($link['tags']!='') foreach(explode(' ',$link['tags']) as $tag) { $tags.='<span class="linktag" title="Add tag"><a href="?addtag='.htmlspecialchars($tag).'">'.htmlspecialchars($tag).'</a></span> '; }
+        $linklist.='<li '.$classprivate.'><span class="linktitle"><a href="'.htmlspecialchars($link['url']).'">'.htmlspecialchars($title).'</a></span>'.$actions.'<br>';
+        if ($description!='') $linklist.='<div class="linkdescription">'.str_replace("\n",'<br>',htmlspecialchars($description)).'</div><br>';
+        $linklist.='<span class="linkdate">'.htmlspecialchars(linkdate2locale($link['linkdate'])).' - </span><span class="linkurl">'.htmlspecialchars($link['url']).'</span><br>'.$tags."</li>\n";  
+        $i++;
+    } 
+    
+    // Show paging.
+    $searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
+    $searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
+    $paging=''; 
+    if ($i!=count($keys)) $paging.='<a href="?page='.($page+1).$searchterm.$searchtags.'">&#x25C4;Older</a>';
+    $paging.= '<span style="color:#fff; padding:0 20 0 20;">page '.$page.' / '.$pagecount.'</span>';
+    if ($page>1) $paging.='<a href="?page='.($page-1).$searchterm.$searchtags.'">Newer&#x25BA;</a>';
+    $linksperpage = <<<HTML
+<div style="float:right; padding-right:5px;">
+Links per page: <a href="?linksperpage=20">20</a> <a href="?linksperpage=50">50</a> <a href="?linksperpage=100">100</a>
+ <form method="GET" style="display:inline;"><input type="text" name="linksperpage" size="2" style="height:15px;"></form></div>
+HTML;
+    $paging = '<div class="paging">'.$linksperpage.$paging.'</div>';
+    $linklist='<div id="linklist">'.$paging.$searched.'<ul>'.$linklist.'</ul>'.$paging.'</div>';
+    return $linklist;
+}
+
+// -----------------------------------------------------------------------------------------------
+// Template for the whole page.
+/* Input: $data (associative array).
+                Keys: 'body' : body of HTML document
+                      'pageheader' : html code to show in page header (top of page)
+                      'onload' : optional onload javascript for the <body>
+*/
+function templatePage($data)
+{
+    global $STARTTIME;
+    global $LINKSDB;
+    $shaarli_version = shaarli_version;
+    $linkcount = count($LINKSDB); 
+    $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>');  
+    foreach(array('pageheader','body','onload') as $k) // make sure all required fields exist (put an empty string if not).
+    {
+        if (!array_key_exists($k,$data)) $data[$k]='';
+    }
+    $feedurl=htmlspecialchars(serverUrl().$_SERVER['SCRIPT_NAME'].'?do=rss');
+    echo <<<HTML
+<html>
+<head>
+<title>Shaarli - Let's shaare your links...</title>
+<link rel="alternate" type="application/rss+xml" href="{$feedurl}">
+<style type="text/css">
+<!--
+/* CSS Reset from Yahoo to cope with browsers CSS inconsistencies. */
+/*
+Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html
+version: 2.8.2r1
+*/
+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%;}
+
+body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; } 
+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; } 
+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; } 
+/* I don't give a shit about IE. He can't understand selectors such as input[type='submit']. */
+
+.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;} 
+.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;} 
+#pageheader
+{
+color:#eee;
+border-bottom: 1px solid #aaa;    
+background-color: #6A6A6A;
+background-image: -webkit-gradient(linear, left top, left bottom, from(#6A6A6A), to(#303030)); /* Saf4+, Chrome */
+background-image: -webkit-linear-gradient(top, #6A6A6A, #303030); /* Chrome 10+, Saf5.1+ */
+background-image:    -moz-linear-gradient(top, #6A6A6A, #303030); /* FF3.6 */
+background-image:     -ms-linear-gradient(top, #6A6A6A, #303030); /* IE10 */
+background-image:      -o-linear-gradient(top, #6A6A6A, #303030); /* Opera 11.10+ */
+background-image:         linear-gradient(top, #6A6A6A, #303030);
+filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#6A6A6A', EndColorStr='#303030'); /* IE6-IE9 */
+padding-bottom: 5px;
+}
+#pageheader a:link { color:#bbb; text-decoration:none;}
+#pageheader a:visited { color:#bbb; text-decoration:none;}
+#pageheader a:hover { color:#FFFFC9; text-decoration:none;}
+#pageheader a:active { color:#bbb; text-decoration:none;} 
+.paging { background-color:#777; color:#ccc; text-align:center; padding:0 0 3 0;}
+.paging a:link { color:#ccc; text-decoration:none;}
+.paging a:visited { color:#ccc;  }
+.paging a:hover {  color:#FFFFC9;  }
+.paging a:active { color:#fff;  }
+#headerform { padding:5 5 5 15;  }
+#editlinkform {  padding:5 5 5 15px; width:80%; }
+#linklist li { padding:4 10 8 20; border-bottom: 1px solid #bbb;}
+#linklist li.private { background-color: #ccc; border-left:8px solid #888; }
+.linktitle { font-size:14pt; font-weight:bold; }
+.linktitle a { text-decoration: none; color:#0000EE; }
+.linktitle a:hover { text-decoration: underline; }
+.linktitle a:visited { color:#0000BB; }
+.linkdate { font-size:8pt; color:#888; }
+.linkurl { font-size:8pt; color:#4BAA74; }
+.linkdescription { color:#000; margin-top:0px; margin-bottom:0px; font-weight:normal; }
+.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;
+border-bottom:1px solid #aaa; border-right:1px solid #aaa;  }
+.linktag a { color:#777; text-decoration:none;  }
+.buttoneditform { display:inline; }
+#footer { font-size:8pt; text-align:center; border-top:1px solid #ddd; color: #888; }
+-->
+</style>
+</head>
+<body {$data['onload']}>
+<div id="pageheader"><div style="float:right; font-style:italic; color:#bbb; text-align:right; padding:0 5 0 0;">Shaare your links...<br>{$linkcount} links</div>
+    <b><i>Shaarli {$shaarli_version}</i></b> - <a href="?">Home</a>&nbsp;{$menu}&nbsp;<a href="{$feedurl}" style="padding-left:30px;">RSS Feed</a>
+{$data['pageheader']}    
+</div>
+{$data['body']}
+
+HTML;
+    $exectime = round(microtime(true)-$STARTTIME,4);
+    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 '.$exectime.' seconds&nbsp;?</div>';
+    if (isLoggedIn()) echo '<script language="JavaScript">function confirmDeleteLink() { var agree=confirm("Are you sure you want to delete this link ?"); if (agree) return true ; else return false ; }</script>';
+    echo '</body></html>';
+}
+
+// -----------------------------------------------------------------------------------------------
+// Installation
+// This function should NEVER be called if the file data/config.php exists.
+function install()
+{
+    // FIXME: check version of php ?
+    if (isset($_POST['setlogin']) && isset($_POST['setpassword']) && isset($_POST['settimezone']))
+    {
+        if ($_POST['setlogin']!='' && $_POST['setpassword']!='' && in_array($_POST['settimezone'],timezone_identifiers_list()))
+        {   // Everything is ok, let's create config file.
+            $salt=sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
+            $hash = sha1($_POST['setpassword'].$_POST['setlogin'].$salt);
+            $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($_POST['settimezone'],true).'); ?>';
+            file_put_contents(CONFIG_FILE,$config);     
+            echo '<script language="JavaScript">alert("Shaarli is now configured. Please enter your login/password and start shaaring your links !");document.location=\'?do=login\';</script>';        
+            exit;            
+        }
+    }
+    // Display config form:
+    $timezones='';
+    foreach(timezone_identifiers_list() as $tz) $timezones.='<option value="'.htmlspecialchars($tz).'">'.htmlspecialchars($tz)."</option>\n";
+    echo <<<HTML
+<html><title>Shaarli - Configuration</title><style type="text/css">
+body { font-family: "Trebuchet MS",Verdana,Arial,Helvetica,sans-serif; font-size:10pt; background-color: #ffffff; } 
+input { border: 1px solid #aaa; background-color:#F0F0FF; padding: 2 5 2 5; -moz-box-shadow: inset 2px 2px 3px #aaaaaa; -webkit-box-shadow: inset 2px 2px 3px #aaaaaa; box-shadow: inset 2px 2px 3px #aaaaaa; } 
+.bigbutton {border-style:outset;border-width:2px;padding:3px 6px;background-color:rgb(212,212,212);font-family:Tahoma,Verdana,Arial,Helvetica,sans-serif;font-size:8pt;-moz-border-radius:0.5em;border-radius:0.5em;} 
+</style></head><body onload="document.configform.setlogin.focus();"><h1>Shaarli - Shaare your links...</h1>It looks like it's the first time you run Shaarli. Please chose a login/password and a timezone:<br>
+<form method="POST" action="" name="configform" style="border:1px solid black; padding:10 10 10 10;">
+Login: <input type="text" name="setlogin"><br><br>Password: <input type="password" name="setpassword"><br><br>
+Timezone: <select name="settimezone"><option value="0" selected>(please select:)</option>{$timezones}</select><br><br>
+<input type="submit" name="Save" value="Save config" class="bigbutton"></form></body></html>
+HTML;
+    exit;
+}
+
+$LINKSDB=new linkdb(isLoggedIn());  // Read links from database (and filter private links if used it not logged in).
+if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=LINKS_PER_PAGE;
+if (startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
+renderPage();
+?>
\ No newline at end of file