<?php
// Shaarli 0.0.41 beta - Shaare your links...
// The personal, minimalist, super-fast, no-database delicious clone. By sebsauvage.net
// http://sebsauvage.net/wiki/doku.php?id=php:shaarli
// Licence: http://www.opensource.org/licenses/zlib-license.php
// Requires: php 5.1.x (but autocomplete fields will only work if you have php 5.2.x)
// -----------------------------------------------------------------------------------------------
// NEVER TRUST IN PHP.INI
// Some hosts do not define a default timezone in php.ini,
// so we have to do this for avoid the strict standard error.
date_default_timezone_set('UTC');
// -----------------------------------------------------------------------------------------------
// Hardcoded parameter (These parameters can be overwritten by creating the file /config/options.php)
$GLOBALS['config']['DATADIR'] = 'data'; // Data subdirectory
$GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php'; // Configuration file (user login/password)
$GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php'; // Data storage file.
$GLOBALS['config']['LINKS_PER_PAGE'] = 20; // Default links per page.
$GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php'; // File storage for failures and bans.
$GLOBALS['config']['BAN_AFTER'] = 4; // Ban IP after this many failures.
$GLOBALS['config']['BAN_DURATION'] = 1800; // Ban duration for IP address after login failures (in seconds) (1800 sec. = 30 minutes)
$GLOBALS['config']['OPEN_SHAARLI'] = false; // If true, anyone can add/edit/delete links without having to login
$GLOBALS['config']['HIDE_TIMESTAMPS'] = false; // If true, the moment when links were saved are not shown to users that are not logged in.
$GLOBALS['config']['ENABLE_THUMBNAILS'] = true; // Enable thumbnails in links.
$GLOBALS['config']['CACHEDIR'] = 'cache'; // Cache directory for thumbnails for SLOW services (like flickr)
$GLOBALS['config']['PAGECACHE'] = 'pagecache'; // Page cache directory.
$GLOBALS['config']['ENABLE_LOCALCACHE'] = true; // Enable Shaarli to store thumbnail in a local cache. Disable to reduce webspace usage.
$GLOBALS['config']['PUBSUBHUB_URL'] = ''; // PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
$GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt'; // For updates check of Shaarli.
$GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ; // Updates check frequency for Shaarli. 86400 seconds=24 hours
// Note: You must have publisher.php in the same directory as Shaarli index.php
// -----------------------------------------------------------------------------------------------
// You should not touch below (or at your own risks !)
// Optionnal config file.
if (is_file($GLOBALS['config']['DATADIR'].'/options.php')) require($GLOBALS['config']['DATADIR'].'/options.php');
define('shaarli_version','0.0.41 beta');
define('PHPPREFIX','<?php /* '); // Prefix to encapsulate data in php code.
define('PHPSUFFIX',' */ ?>'); // Suffix to encapsulate data in php code.
// Force cookie path (but do not change lifetime)
$cookie=session_get_cookie_params();
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params($cookie['lifetime'],$cookiedir,$_SERVER['HTTP_HOST']); // Set default cookie expiration and path.
// Set session parameters on server side.
define('INACTIVITY_TIMEOUT',3600); // (in seconds). If the user does not access any page within this time, his/her session is considered expired.
ini_set('session.use_cookies', 1); // Use cookies to store session.
ini_set('session.use_only_cookies', 1); // Force cookies for session (phpsessionID forbidden in URL)
ini_set('session.use_trans_sid', false); // Prevent php to use sessionID in URL if cookies are disabled.
session_name('shaarli');
if (session_id() == '') session_start(); // Start session if needed (Some server auto-start sessions).
// PHP Settings
ini_set('max_input_time','60'); // High execution time in case of problematic imports/exports.
ini_set('memory_limit', '128M'); // Try to set max upload file size and read (May not work on some hosts).
ini_set('post_max_size', '16M');
ini_set('upload_max_filesize', '16M');
checkphpversion();
error_reporting(E_ALL^E_WARNING); // See all error except warnings.
//error_reporting(-1); // See all errors (for debugging only)
include "inc/rain.tpl.class.php"; //include Rain TPL
raintpl::$tpl_dir = "tpl/"; // template directory
if (!is_dir('tmp')) { mkdir('tmp',0705); chmod('tmp',0705); }
raintpl::$cache_dir = "tmp/"; // cache directory
ob_start(); // Output buffering for the page cache.
// In case stupid admin has left magic_quotes enabled in php.ini:
if (get_magic_quotes_gpc())
{
function stripslashes_deep($value) { $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value); return $value; }
$_POST = array_map('stripslashes_deep', $_POST);
$_GET = array_map('stripslashes_deep', $_GET);
$_COOKIE = array_map('stripslashes_deep', $_COOKIE);
}
// Prevent caching on client side or proxy: (yes, it's ugly)
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
// Directories creations (Note that your web host may require differents rights than 705.)
if (!is_writable(realpath(dirname(__FILE__)))) die('<pre>ERROR: Shaarli does not have the right to write in its own directory ('.realpath(dirname(__FILE__)).').</pre>');
if (!is_dir($GLOBALS['config']['DATADIR'])) { mkdir($GLOBALS['config']['DATADIR'],0705); chmod($GLOBALS['config']['DATADIR'],0705); }
if (!is_dir('tmp')) { mkdir('tmp',0705); chmod('tmp',0705); } // For RainTPL temporary files.
if (!is_file($GLOBALS['config']['DATADIR'].'/.htaccess')) { file_put_contents($GLOBALS['config']['DATADIR'].'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
// Second check to see if Shaarli can write in its directory, because on some hosts is_writable() is not reliable.
if (!is_file($GLOBALS['config']['DATADIR'].'/.htaccess')) die('<pre>ERROR: Shaarli does not have the right to write in its data directory ('.realpath($GLOBALS['config']['DATADIR']).').</pre>');
if ($GLOBALS['config']['ENABLE_LOCALCACHE'])
{
if (!is_dir($GLOBALS['config']['CACHEDIR'])) { mkdir($GLOBALS['config']['CACHEDIR'],0705); chmod($GLOBALS['config']['CACHEDIR'],0705); }
if (!is_file($GLOBALS['config']['CACHEDIR'].'/.htaccess')) { file_put_contents($GLOBALS['config']['CACHEDIR'].'/.htaccess',"Allow from none\nDeny from all\n"); } // Protect data files.
}
// Handling of old config file which do not have the new parameters.
if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.htmlspecialchars(indexUrl());
if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get();
if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']='';
if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false;
if (empty($GLOBALS['disablejquery'])) $GLOBALS['disablejquery']=false;
if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false;
// I really need to rewrite Shaarli with a proper configuation manager.
// Run config screen if first run:
if (!is_file($GLOBALS['config']['CONFIG_FILE'])) install();
require $GLOBALS['config']['CONFIG_FILE']; // Read login/password hash into $GLOBALS.
autoLocale(); // Sniff browser language and set date format accordingly.
header('Content-Type: text/html; charset=utf-8'); // We use UTF-8 for proper international characters handling.
// Check php version
function checkphpversion()
{
if (version_compare(PHP_VERSION, '5.1.0') < 0)
{
header('Content-Type: text/plain; charset=utf-8');
echo 'Your server supports php '.PHP_VERSION.'. Shaarli requires at least php 5.1.0, and thus cannot run. Sorry.';
exit;
}
}
// Checks if an update is available for Shaarli.
// (at most once a day, and only for registered user.)
// Output: '' = no new version.
// other= the available version.
function checkUpdate()
{
if (!isLoggedIn()) return ''; // Do not check versions for visitors.
// Get latest version number at most once a day.
if (!is_file($GLOBALS['config']['UPDATECHECK_FILENAME']) || (filemtime($GLOBALS['config']['UPDATECHECK_FILENAME'])<time()-($GLOBALS['config']['UPDATECHECK_INTERVAL'])))
{
$version=shaarli_version;
list($httpstatus,$headers,$data) = getHTTP('http://sebsauvage.net/files/shaarli_version.txt',2);
if (strpos($httpstatus,'200 OK')!==false) $version=$data;
// If failed, nevermind. We don't want to bother the user with that.
file_put_contents($GLOBALS['config']['UPDATECHECK_FILENAME'],$version); // touch file date
}
// Compare versions:
$newestversion=file_get_contents($GLOBALS['config']['UPDATECHECK_FILENAME']);
if (version_compare($newestversion,shaarli_version)==1) return $newestversion;
return '';
}
// -----------------------------------------------------------------------------------------------
// Simple cache system (mainly for the RSS/ATOM feeds).
class pageCache
{
private $url; // Full URL of the page to cache (typically the value returned by pageUrl())
private $shouldBeCached; // boolean: Should this url be cached ?
private $filename; // Name of the cache file for this url
/*
$url = url (typically the value returned by pageUrl())
$shouldBeCached = boolean. If false, the cache will be disabled.
*/
public function __construct($url,$shouldBeCached)
{
$this->url = $url;
$this->filename = $GLOBALS['config']['PAGECACHE'].'/'.sha1($url).'.cache';
$this->shouldBeCached = $shouldBeCached;
}
// If the page should be cached and a cached version exists,
// returns the cached version (otherwise, return null).
public function cachedVersion()
{
if (!$this->shouldBeCached) return null;
if (is_file($this->filename)) { return file_get_contents($this->filename); exit; }
return null;
}
// Put a page in the cache.
public function cache($page)
{
if (!$this->shouldBeCached) return;
if (!is_dir($GLOBALS['config']['PAGECACHE'])) { mkdir($GLOBALS['config']['PAGECACHE'],0705); chmod($GLOBALS['config']['PAGECACHE'],0705); }
file_put_contents($this->filename,$page);
}
// Purge the whole cache.
// (call with pageCache::purgeCache())
public static function purgeCache()
{
if (is_dir($GLOBALS['config']['PAGECACHE']))
{
$handler = opendir($GLOBALS['config']['PAGECACHE']);
if ($handler!==false)
{
while (($filename = readdir($handler))!==false)
{
if (endsWith($filename,'.cache')) { unlink($GLOBALS['config']['PAGECACHE'].'/'.$filename); }
}
closedir($handler);
}
}
}
}
// -----------------------------------------------------------------------------------------------
// Log to text file
function logm($message)
{
$t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND);
}
// Same as nl2br(), but escapes < and >
function nl2br_escaped($html)
{
return str_replace('>','>',str_replace('<','<',nl2br($html)));
}
/* Returns the small hash of a string
eg. smallHash('20111006_131924') --> yZH23w
Small hashes:
- are unique (well, as unique as crc32, at last)
- are always 6 characters long.
- only use the following characters: a-z A-Z 0-9 - _ @
- are NOT cryptographically secure (they CAN be forged)
In Shaarli, they are used as a tinyurl-like link to individual entries.
*/
function smallHash($text)
{
$t = rtrim(base64_encode(hash('crc32',$text,true)),'=');
$t = str_replace('+','-',$t); // Get rid of characters which need encoding in URLs.
$t = str_replace('/','_',$t);
$t = str_replace('=','@',$t);
return $t;
}
// In a string, converts urls to clickable links.
// Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722
function text2clickable($url)
{
$redir = empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'];
return preg_replace('!(((?:https?|ftp|file)://|apt:|magnet:)\S+[[:alnum:]]/?)!si','<a href="'.$redir.'$1" rel="nofollow">$1</a>',$url);
}
// This function inserts where relevant so that multiple spaces are properly displayed in HTML
// even in the absence of <pre> (This is used in description to keep text formatting)
function keepMultipleSpaces($text)
{
return str_replace(' ',' ',$text);
}
// ------------------------------------------------------------------------------------------
// Sniff browser language to display dates in the right format automatically.
// (Note that is may not work on your server if the corresponding local is not installed.)
function autoLocale()
{
$loc='en_US'; // Default if browser does not send HTTP_ACCEPT_LANGUAGE
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // eg. "fr,fr-fr;q=0.8,en;q=0.5,en-us;q=0.3"
{ // (It's a bit crude, but it works very well. Prefered language is always presented first.)
if (preg_match('/([a-z]{2}(-[a-z]{2})?)/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) $loc=$matches[1];
}
setlocale(LC_TIME,$loc); // LC_TIME = Set local for date/time format only.
}
// ------------------------------------------------------------------------------------------
// PubSubHubbub protocol support (if enabled) [UNTESTED]
// (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php';
function pubsubhub()
{
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
$p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']);
$topic_url = array (
indexUrl().'?do=atom',
indexUrl().'?do=rss'
);
$p->publish_update($topic_url);
}
}
// ------------------------------------------------------------------------------------------
// Session management
// Returns the IP address of the client (Used to prevent session cookie hijacking.)
function allIPs()
{
$ip = $_SERVER["REMOTE_ADDR"];
// Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip=$ip.'_'.$_SERVER['HTTP_X_FORWARDED_FOR']; }
if (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip=$ip.'_'.$_SERVER['HTTP_CLIENT_IP']; }
return $ip;
}
// Check that user/password is correct.
function check_auth($login,$password)
{
$hash = sha1($password.$login.$GLOBALS['salt']);
if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
{ // Login/password is correct.
$_SESSION['uid'] = sha1(uniqid('',true).'_'.mt_rand()); // generate unique random number (different than phpsessionid)
$_SESSION['ip']=allIPs(); // We store IP address(es) of the client to make sure session is not hijacked.
$_SESSION['username']=$login;
$_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
logm('Login successful');
return True;
}
logm('Login failed for user '.$login);
return False;
}
// Returns true if the user is logged in.
function isLoggedIn()
{
if ($GLOBALS['config']['OPEN_SHAARLI']) return true;
if (!isset($GLOBALS['login'])) return false; // Shaarli is not configured yet.
// If session does not exist on server side, or IP address has changed, or session has expired, logout.
if (empty($_SESSION['uid']) || ($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) || time()>=$_SESSION['expires_on'])
{
logout();
return false;
}
if (!empty($_SESSION['longlastingsession'])) $_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
else $_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
return true;
}
// Force logout.
function logout() { if (isset($_SESSION)) { unset($_SESSION['uid']); unset($_SESSION['ip']); unset($_SESSION['username']); unset($_SESSION['privateonly']); } }
// ------------------------------------------------------------------------------------------
// Brute force protection system
// Several consecutive failed logins will ban the IP address for 30 minutes.
if (!is_file($GLOBALS['config']['IPBANS_FILENAME'])) file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>");
include $GLOBALS['config']['IPBANS_FILENAME'];
// Signal a failed login. Will ban the IP if too many failures:
function ban_loginFailed()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
if (!isset($gb['FAILURES'][$ip])) $gb['FAILURES'][$ip]=0;
$gb['FAILURES'][$ip]++;
if ($gb['FAILURES'][$ip]>($GLOBALS['config']['BAN_AFTER']-1))
{
$gb['BANS'][$ip]=time()+$GLOBALS['config']['BAN_DURATION'];
logm('IP address banned from login');
}
$GLOBALS['IPBANS'] = $gb;
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
}
// Signals a successful login. Resets failed login counter.
function ban_loginOk()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
$GLOBALS['IPBANS'] = $gb;
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
}
// Checks if the user CAN login. If 'true', the user can try to login.
function ban_canLogin()
{
$ip=$_SERVER["REMOTE_ADDR"]; $gb=$GLOBALS['IPBANS'];
if (isset($gb['BANS'][$ip]))
{
// User is banned. Check if the ban has expired:
if ($gb['BANS'][$ip]<=time())
{ // Ban expired, user can try to login again.
logm('Ban lifted.');
unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
file_put_contents($GLOBALS['config']['IPBANS_FILENAME'], "<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>");
return true; // Ban has expired, user can login.
}
return false; // User is banned.
}
return true; // User is not banned.
}
// ------------------------------------------------------------------------------------------
// Process login form: Check if login/password is correct.
if (isset($_POST['login']))
{
if (!ban_canLogin()) die('I said: NO. You are banned for the moment. Go away.');
if (isset($_POST['password']) && tokenOk($_POST['token']) && (check_auth($_POST['login'], $_POST['password'])))
{ // Login/password is ok.
ban_loginOk();
// If user wants to keep the session cookie even after the browser closes:
if (!empty($_POST['longlastingsession']))
{
$_SESSION['longlastingsession']=31536000; // (31536000 seconds = 1 year)
$_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // Set session expiration on server-side.
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params($_SESSION['longlastingsession'],$cookiedir,$_SERVER['HTTP_HOST']); // Set session cookie expiration on client side
// Note: Never forget the trailing slash on the cookie path !
session_regenerate_id(true); // Send cookie with new expiration date to browser.
}
else // Standard session expiration (=when browser closes)
{
$cookiedir = ''; if(dirname($_SERVER['SCRIPT_NAME'])!='/') $cookiedir=dirname($_SERVER["SCRIPT_NAME"]).'/';
session_set_cookie_params(0,$cookiedir,$_SERVER['HTTP_HOST']); // 0 means "When browser closes"
session_regenerate_id(true);
}
// Optional redirect after login:
if (isset($_GET['post'])) { header('Location: ?post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); exit; }
if (isset($_POST['returnurl']))
{
if (endsWith($_POST['returnurl'],'?do=login')) { header('Location: ?'); exit; } // Prevent loops over login screen.
header('Location: '.$_POST['returnurl']); exit;
}
header('Location: ?'); exit;
}
else
{
ban_loginFailed();
$redir = '';
if (isset($_GET['post'])) { $redir = '&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):''); }
echo '<script language="JavaScript">alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
exit;
}
}
// ------------------------------------------------------------------------------------------
// Misc utility functions:
// Returns the server URL (including port and http/https), without path.
// eg. "http://myserver.com:8080"
// You can append $_SERVER['SCRIPT_NAME'] to get the current script URL.
function serverUrl()
{
$https = (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS'])=='on')) || $_SERVER["SERVER_PORT"]=='443'; // HTTPS detection.
$serverport = ($_SERVER["SERVER_PORT"]=='80' || ($https && $_SERVER["SERVER_PORT"]=='443') ? '' : ':'.$_SERVER["SERVER_PORT"]);
return 'http'.($https?'s':'').'://'.$_SERVER['HTTP_HOST'].$serverport;
}
// Returns the absolute URL of current script, without the query.
// (eg. http://sebsauvage.net/links/)
function indexUrl()
{
$scriptname = $_SERVER["SCRIPT_NAME"];
// If the script is named 'index.php', we remove it (for better looking URLs,
// eg. http://mysite.com/shaarli/?abcde instead of http://mysite.com/shaarli/index.php?abcde)
if (endswith($scriptname,'index.php')) $scriptname = substr($scriptname,0,strlen($scriptname)-9);
return serverUrl() . $scriptname;
}
// Returns the absolute URL of current script, WITH the query.
// (eg. http://sebsauvage.net/links/?toto=titi&spamspamspam=humbug)
function pageUrl()
{
return indexUrl().(!empty($_SERVER["QUERY_STRING"]) ? '?'.$_SERVER["QUERY_STRING"] : '');
}
// Convert post_max_size/upload_max_filesize (eg.'16M') parameters to bytes.
function return_bytes($val)
{
$val = trim($val); $last=strtolower($val[strlen($val)-1]);
switch($last)
{
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}
// Try to determine max file size for uploads (POST).
// Returns an integer (in bytes)
function getMaxFileSize()
{
$size1 = return_bytes(ini_get('post_max_size'));
$size2 = return_bytes(ini_get('upload_max_filesize'));
// Return the smaller of two:
$maxsize = min($size1,$size2);
// FIXME: Then convert back to readable notations ? (eg. 2M instead of 2000000)
return $maxsize;
}
// Tells if a string start with a substring or not.
function startsWith($haystack,$needle,$case=true)
{
if($case){return (strcmp(substr($haystack, 0, strlen($needle)),$needle)===0);}
return (strcasecmp(substr($haystack, 0, strlen($needle)),$needle)===0);
}
// Tells if a string ends with a substring or not.
function endsWith($haystack,$needle,$case=true)
{
if($case){return (strcmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);}
return (strcasecmp(substr($haystack, strlen($haystack) - strlen($needle)),$needle)===0);
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
(used to build the ADD_DATE attribute in Netscape-bookmarks file)
PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
function linkdate2timestamp($linkdate)
{
$Y=$M=$D=$h=$m=$s=0;
$r = sscanf($linkdate,'%4d%2d%2d_%2d%2d%2d',$Y,$M,$D,$h,$m,$s);
return mktime($h,$m,$s,$M,$D,$Y);
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a RFC822 date.
(used to build the pubDate attribute in RSS feed.) */
function linkdate2rfc822($linkdate)
{
return date('r',linkdate2timestamp($linkdate)); // 'r' is for RFC822 date format.
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a ISO 8601 date.
(used to build the updated tags in ATOM feed.) */
function linkdate2iso8601($linkdate)
{
return date('c',linkdate2timestamp($linkdate)); // 'c' is for ISO 8601 date format.
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a localized date format.
(used to display link date on screen)
The date format is automatically chosen according to locale/languages sniffed from browser headers (see autoLocale()). */
function linkdate2locale($linkdate)
{
return utf8_encode(strftime('%c',linkdate2timestamp($linkdate))); // %c is for automatic date format according to locale.
// Note that if you use a local which is not installed on your webserver,
// the date will not be displayed in the chosen locale, but probably in US notation.
}
// Parse HTTP response headers and return an associative array.
function http_parse_headers_shaarli( $headers )
{
$res=array();
foreach($headers as $header)
{
$i = strpos($header,': ');
if ($i!==false)
{
$key=substr($header,0,$i);
$value=substr($header,$i+2,strlen($header)-$i-2);
$res[$key]=$value;
}
}
return $res;
}
/* GET an URL.
Input: $url : url to get (http://...)
$timeout : Network timeout (will wait this many seconds for an anwser before giving up).
Output: An array. [0] = HTTP status message (eg. "HTTP/1.1 200 OK") or error message
[1] = associative array containing HTTP response headers (eg. echo getHTTP($url)[1]['Content-Type'])
[2] = data
Example: list($httpstatus,$headers,$data) = getHTTP('http://sebauvage.net/');
if (strpos($httpstatus,'200 OK')!==false)
echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
else
echo 'There was an error: '.htmlspecialchars($httpstatus)
*/
function getHTTP($url,$timeout=30)
{
try
{
$options = array('http'=>array('method'=>'GET','timeout' => $timeout, 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0')); // Force network timeout
$context = stream_context_create($options);
$data=file_get_contents($url,false,$context,-1, 4000000); // We download at most 4 Mb from source.
if (!$data) { return array('HTTP Error',array(),''); }
$httpStatus=$http_response_header[0]; // eg. "HTTP/1.1 200 OK"
$responseHeaders=http_parse_headers_shaarli($http_response_header);
return array($httpStatus,$responseHeaders,$data);
}
catch (Exception $e) // getHTTP *can* fail silentely (we don't care if the title cannot be fetched)
{
return array($e->getMessage(),'','');
}
}
// Extract title from an HTML document.
// (Returns an empty string if not found.)
function html_extract_title($html)
{
return preg_match('!<title>(.*?)</title>!is', $html, $matches) ? trim(str_replace("\n",' ', $matches[1])) : '' ;
}
// ------------------------------------------------------------------------------------------
// Token management for XSRF protection
// Token should be used in any form which acts on data (create,update,delete,import...).
if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
// Returns a token.
function getToken()
{
$rnd = sha1(uniqid('',true).'_'.mt_rand().$GLOBALS['salt']); // We generate a random string.
$_SESSION['tokens'][$rnd]=1; // Store it on the server side.
return $rnd;
}
// Tells if a token is ok. Using this function will destroy the token.
// true=token is ok.
function tokenOk($token)
{
if (isset($_SESSION['tokens'][$token]))
{
unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
return true; // Token is ok.
}
return false; // Wrong token, or already used.
}
// ------------------------------------------------------------------------------------------
/* This class is in charge of building the final page.
(This is basically a wrapper around RainTPL which pre-fills some fields.)
p = new pageBuilder;
p.assign('myfield','myvalue');
p.renderPage('mytemplate');
*/
class pageBuilder
{
private $tpl; // RainTPL template
function __construct()
{
$this->tpl=false;
}
private function initialize()
{
$this->tpl = new RainTPL;
$this->tpl->assign('newversion',checkUpdate());
$this->tpl->assign('feedurl',htmlspecialchars(indexUrl()));
$searchcrits=''; // Search criteria
if (!empty($_GET['searchtags'])) $searchcrits.='&searchtags='.urlencode($_GET['searchtags']);
elseif (!empty($_GET['searchterm'])) $searchcrits.='&searchterm='.urlencode($_GET['searchterm']);
$this->tpl->assign('searchcrits',$searchcrits);
$this->tpl->assign('source',indexUrl());
$this->tpl->assign('version',shaarli_version);
$this->tpl->assign('scripturl',indexUrl());
$this->tpl->assign('pagetitle','Shaarli');
$this->tpl->assign('privateonly',!empty($_SESSION['privateonly'])); // Show only private links ?
if (!empty($GLOBALS['title'])) $this->tpl->assign('pagetitle',$GLOBALS['title']);
if (!empty($GLOBALS['pagetitle'])) $this->tpl->assign('pagetitle',$GLOBALS['pagetitle']);
$this->tpl->assign('shaarlititle',empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title'] );
return;
}
// The following assign() method is basically the same as RainTPL (except that it's lazy)
public function assign($what,$where)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->assign($what,$where);
}
// Render a specific page (using a template).
// eg. pb.renderPage('picwall')
public function renderPage($page)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->draw($page);
}
}
// ------------------------------------------------------------------------------------------
/* Data storage for links.
This object behaves like an associative array.
Example:
$mylinks = new linkdb();
echo $mylinks['20110826_161819']['title'];
foreach($mylinks as $link)
echo $link['title'].' at url '.$link['url'].' ; description:'.$link['description'];
Available keys:
title : Title of the link
url : URL of the link. Can be absolute or relative. Relative URLs are permalinks (eg.'?m-ukcw')
description : description of the entry
private : Is this link private ? 0=no, other value=yes
linkdate : date of the creation of this entry, in the form YYYYMMDD_HHMMSS (eg.'20110914_192317')
tags : tags attached to this entry (separated by spaces)
We implement 3 interfaces:
- ArrayAccess so that this object behaves like an associative array.
- Iterator so that this object can be used in foreach() loops.
- Countable interface so that we can do a count() on this object.
*/
class linkdb implements Iterator, Countable, ArrayAccess
{
private $links; // List of links (associative array. Key=linkdate (eg. "20110823_124546"), value= associative array (keys:title,description...)
private $urls; // List of all recorded URLs (key=url, value=linkdate) for fast reserve search (url-->linkdate)
private $keys; // List of linkdate keys (for the Iterator interface implementation)
private $position; // Position in the $this->keys array. (for the Iterator interface implementation.)
private $loggedin; // Is the used logged in ? (used to filter private links)
// Constructor:
function __construct($isLoggedIn)
// Input : $isLoggedIn : is the used logged in ?
{
$this->loggedin = $isLoggedIn;
$this->checkdb(); // Make sure data file exists.
$this->readdb(); // Then read it.
}
// ---- Countable interface implementation
public function count() { return count($this->links); }
// ---- ArrayAccess interface implementation
public function offsetSet($offset, $value)
{
if (!$this->loggedin) die('You are not authorized to add a link.');
if (empty($value['linkdate']) || empty($value['url'])) die('Internal Error: A link should always have a linkdate and url.');
if (empty($offset)) die('You must specify a key.');
$this->links[$offset] = $value;
$this->urls[$value['url']]=$offset;
}
public function offsetExists($offset) { return array_key_exists($offset,$this->links); }
public function offsetUnset($offset)
{
if (!$this->loggedin) die('You are not authorized to delete a link.');
$url = $this->links[$offset]['url']; unset($this->urls[$url]);
unset($this->links[$offset]);
}
public function offsetGet($offset) { return isset($this->links[$offset]) ? $this->links[$offset] : null; }
// ---- Iterator interface implementation
function rewind() { $this->keys=array_keys($this->links); rsort($this->keys); $this->position=0; } // Start over for iteration, ordered by date (latest first).
function key() { return $this->keys[$this->position]; } // current key
function current() { return $this->links[$this->keys[$this->position]]; } // current value
function next() { ++$this->position; } // go to next item
function valid() { return isset($this->keys[$this->position]); } // Check if current position is valid.
// ---- Misc methods
private function checkdb() // Check if db directory and file exists.
{
if (!file_exists($GLOBALS['config']['DATASTORE'])) // Create a dummy database for example.
{
$this->links = array();
$link = array('title'=>'Shaarli - sebsauvage.net','url'=>'http://sebsauvage.net/wiki/doku.php?id=php:shaarli','description'=>'Welcome to Shaarli ! This is a bookmark. To edit or delete me, you must first login.','private'=>0,'linkdate'=>'20110914_190000','tags'=>'opensource software');
$this->links[$link['linkdate']] = $link;
$link = array('title'=>'My secret stuff... - Pastebin.com','url'=>'http://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']] = $link;
file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX); // Write database to disk
}
}
// Read database from disk to memory
private function readdb()
{
// Read data
$this->links=(file_exists($GLOBALS['config']['DATASTORE']) ? unserialize(gzinflate(base64_decode(substr(file_get_contents($GLOBALS['config']['DATASTORE']),strlen(PHPPREFIX),-strlen(PHPSUFFIX))))) : array() );
// Note that gzinflate is faster than gzuncompress. See: http://www.php.net/manual/en/function.gzdeflate.php#96439
// If user is not logged in, filter private links.
if (!$this->loggedin)
{
$toremove=array();
foreach($this->links as $link) { if ($link['private']!=0) $toremove[]=$link['linkdate']; }
foreach($toremove as $linkdate) { unset($this->links[$linkdate]); }
}
// Keep the list of the mapping URLs-->linkdate up-to-date.
$this->urls=array();
foreach($this->links as $link) { $this->urls[$link['url']]=$link['linkdate']; }
}
// Save database from memory to disk.
public function savedb()
{
if (!$this->loggedin) die('You are not authorized to change the database.');
file_put_contents($GLOBALS['config']['DATASTORE'], PHPPREFIX.base64_encode(gzdeflate(serialize($this->links))).PHPSUFFIX);
invalidateCaches();
}
// Returns the link for a given URL (if it exists). false it does not exist.
public function getLinkFromUrl($url)
{
if (isset($this->urls[$url])) return $this->links[$this->urls[$url]];
return false;
}
// Case insentitive search among links (in url, title and description). Returns filtered list of links.
// eg. print_r($mydb->filterFulltext('hollandais'));
public function filterFulltext($searchterms)
{
// FIXME: explode(' ',$searchterms) and perform a AND search.
// FIXME: accept double-quotes to search for a string "as is" ?
$filtered=array();
$s = strtolower($searchterms);
foreach($this->links as $l)
{
$found= (strpos(strtolower($l['title']),$s)!==false)
|| (strpos(strtolower($l['description']),$s)!==false)
|| (strpos(strtolower($l['url']),$s)!==false)
|| (strpos(strtolower($l['tags']),$s)!==false);
if ($found) $filtered[$l['linkdate']] = $l;
}
krsort($filtered);
return $filtered;
}
// Filter by tag.
// You can specify one or more tags (tags can be separated by space or comma).
// eg. print_r($mydb->filterTags('linux programming'));
public function filterTags($tags,$casesensitive=false)
{
$t = str_replace(',',' ',($casesensitive?$tags:strtolower($tags)));
$searchtags=explode(' ',$t);
$filtered=array();
foreach($this->links as $l)
{
$linktags = explode(' ',($casesensitive?$l['tags']:strtolower($l['tags'])));
if (count(array_intersect($linktags,$searchtags)) == count($searchtags))
$filtered[$l['linkdate']] = $l;
}
krsort($filtered);
return $filtered;
}
// Filter by day. Day must be in the form 'YYYYMMDD' (eg. '20120125')
// Sort order is: older articles first.
// eg. print_r($mydb->filterDay('20120125'));
public function filterDay($day)
{
$filtered=array();
foreach($this->links as $l)
{
if (startsWith($l['linkdate'],$day)) $filtered[$l['linkdate']] = $l;
}
ksort($filtered);
return $filtered;
}
// Filter by smallHash.
// Only 1 article is returned.
public function filterSmallHash($smallHash)
{
$filtered=array();
foreach($this->links as $l)
{
if ($smallHash==smallHash($l['linkdate'])) // Yes, this is ugly and slow
{
$filtered[$l['linkdate']] = $l;
return $filtered;
}
}
return $filtered;
}
// Returns the list of all tags
// Output: associative array key=tags, value=0
public function allTags()
{
$tags=array();
foreach($this->links as $link)
foreach(explode(' ',$link['tags']) as $tag)
if (!empty($tag)) $tags[$tag]=(empty($tags[$tag]) ? 1 : $tags[$tag]+1);
arsort($tags); // Sort tags by usage (most used tag first)
return $tags;
}
// Returns the list of days containing articles (oldest first)
// Output: An array containing days (in format YYYYMMDD).
public function days()
{
$linkdays=array();
foreach(array_keys($this->links) as $day)
{
$linkdays[substr($day,0,8)]=0;
}
$linkdays=array_keys($linkdays);
sort($linkdays);
return $linkdays;
}
}
// ------------------------------------------------------------------------------------------
// Ouput the last 50 links in RSS 2.0 format.
function showRSS()
{
header('Content-Type: application/rss+xml; charset=utf-8');
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. eg. http://mysite.com/shaarli/?do=rss&permalinks
$usepermalinks = isset($_GET['permalinks']);
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new pageCache(pageUrl(),startsWith($query,'do=rss') && !isLoggedIn());
$cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
// Optionnaly filter the results:
$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $linksToDisplay = $LINKSDB;
$pageaddr=htmlspecialchars(indexUrl());
echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
echo '<channel><title>'.htmlspecialchars($GLOBALS['title']).'</title><link>'.$pageaddr.'</link>';
echo '<description>Shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n\n";
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
echo '<!-- PubSubHubbub Discovery -->';
echo '<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" xmlns="http://www.w3.org/2005/Atom" />';
echo '<link rel="self" href="'.htmlspecialchars($pageaddr).'?do=rss" xmlns="http://www.w3.org/2005/Atom" />';
echo '<!-- End Of PubSubHubbub Discovery -->';
}
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<50 && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$rfc822date = linkdate2rfc822($link['linkdate']);
$absurl = htmlspecialchars($link['url']);
if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
if ($usepermalinks===true)
echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$guid.'</link>';
else
echo '<item><title>'.htmlspecialchars($link['title']).'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$absurl.'</link>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) echo '<pubDate>'.htmlspecialchars($rfc822date)."</pubDate>\n";
if ($link['tags']!='') // Adding tags to each RSS entry (as mentioned in RSS specification)
{
foreach(explode(' ',$link['tags']) as $tag) { echo '<category domain="'.htmlspecialchars($pageaddr).'">'.htmlspecialchars($tag).'</category>'."\n"; }
}
// Add permalink in description
$descriptionlink = '(<a href="'.$guid.'">Permalink</a>)';
// If user wants permalinks first, put the final link in description
if ($usepermalinks===true) $descriptionlink = '(<a href="'.$absurl.'">Link</a>)';
if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink;
echo '<description><![CDATA['.nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description'])))).$descriptionlink.']]></description>'."\n</item>\n";
$i++;
}
echo '</channel></rss><!-- Cached version of '.pageUrl().' -->';
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Ouput the last 50 links in ATOM format.
function showATOM()
{
header('Content-Type: application/atom+xml; charset=utf-8');
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. eg. http://mysite.com/shaarli/?do=atom&permalinks
$usepermalinks = isset($_GET['permalinks']);
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new pageCache(pageUrl(),startsWith($query,'do=atom') && !isLoggedIn());
$cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
// Optionnaly filter the results:
$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $linksToDisplay = $LINKSDB;
$pageaddr=htmlspecialchars(indexUrl());
$latestDate = '';
$entries='';
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<50 && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$iso8601date = linkdate2iso8601($link['linkdate']);
$latestDate = max($latestDate,$iso8601date);
$absurl = htmlspecialchars($link['url']);
if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
$entries.='<entry><title>'.htmlspecialchars($link['title']).'</title>';
if ($usepermalinks===true)
$entries.='<link href="'.$guid.'" /><id>'.$guid.'</id>';
else
$entries.='<link href="'.$absurl.'" /><id>'.$guid.'</id>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $entries.='<updated>'.htmlspecialchars($iso8601date).'</updated>';
// Add permalink in description
$descriptionlink = htmlspecialchars('(<a href="'.$guid.'">Permalink</a>)');
// If user wants permalinks first, put the final link in description
if ($usepermalinks===true) $descriptionlink = htmlspecialchars('(<a href="'.$absurl.'">Link</a>)');
if (strlen($link['description'])>0) $descriptionlink = '<br>'.$descriptionlink;
$entries.='<content type="html">'.htmlspecialchars(nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))))).$descriptionlink."</content>\n";
if ($link['tags']!='') // Adding tags to each ATOM entry (as mentioned in ATOM specification)
{
foreach(explode(' ',$link['tags']) as $tag)
{ $entries.='<category scheme="'.htmlspecialchars($pageaddr,ENT_QUOTES).'" term="'.htmlspecialchars($tag,ENT_QUOTES).'" />'."\n"; }
}
$entries.="</entry>\n";
$i++;
}
$feed='<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">';
$feed.='<title>'.htmlspecialchars($GLOBALS['title']).'</title>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $feed.='<updated>'.htmlspecialchars($latestDate).'</updated>';
$feed.='<link rel="self" href="'.htmlspecialchars(serverUrl().$_SERVER["REQUEST_URI"]).'" />';
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
$feed.='<!-- PubSubHubbub Discovery -->';
$feed.='<link rel="hub" href="'.htmlspecialchars($GLOBALS['config']['PUBSUBHUB_URL']).'" />';
$feed.='<!-- End Of PubSubHubbub Discovery -->';
}
$feed.='<author><name>'.htmlspecialchars($pageaddr).'</name><uri>'.htmlspecialchars($pageaddr).'</uri></author>';
$feed.='<id>'.htmlspecialchars($pageaddr).'</id>'."\n\n"; // Yes, I know I should use a real IRI (RFC3987), but the site URL will do.
$feed.=$entries;
$feed.='</feed><!-- Cached version of '.pageUrl().' -->';
echo $feed;
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Daily RSS feed: 1 RSS entry per day giving all the links on that day.
// Gives the last 7 days (which have links).
// This RSS feed cannot be filtered.
function showDailyRSS()
{
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new pageCache(pageUrl(),startsWith($query,'do=dailyrss') && !isLoggedIn());
$cached = $cache->cachedVersion(); if (!empty($cached)) { echo $cached; exit; }
// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
/* Some Shaarlies may have very few links, so we need to look
back in time (rsort()) until we have enough days ($nb_of_days).
*/
$linkdates=array(); foreach($LINKSDB as $linkdate=>$value) { $linkdates[]=$linkdate; }
rsort($linkdates);
$nb_of_days=7; // We take 7 days.
$today=Date('Ymd');
$days=array();
foreach($linkdates as $linkdate)
{
$day=substr($linkdate,0,8); // Extract day (without time)
if (strcmp($day,$today)<0)
{
if (empty($days[$day])) $days[$day]=array();
$days[$day][]=$linkdate;
}
if (count($days)>$nb_of_days) break; // Have we collected enough days ?
}
// Build the RSS feed.
header('Content-Type: application/rss+xml; charset=utf-8');
$pageaddr=htmlspecialchars(indexUrl());
echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
echo '<channel><title>Daily - '.htmlspecialchars($GLOBALS['title']).'</title><link>'.$pageaddr.'</link>';
echo '<description>Daily shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n";
foreach($days as $day=>$linkdates) // For each day.
{
$daydate = utf8_encode(strftime('%A %d, %B %Y',linkdate2timestamp($day.'_000000'))); // Full text date
$rfc822date = linkdate2rfc822($day.'_000000');
$absurl=htmlspecialchars(indexUrl().'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page.
echo '<item><title>'.htmlspecialchars($GLOBALS['title'].' - '.$daydate).'</title><guid>'.$absurl.'</guid><link>'.$absurl.'</link>';
echo '<pubDate>'.htmlspecialchars($rfc822date)."</pubDate>";
// Build the HTML body of this RSS entry.
$html='';
$href='';
$links=array();
// We pre-format some fields for proper output.
foreach($linkdates as $linkdate)
{
$l = $LINKSDB[$linkdate];
$l['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($l['description']))));
$l['thumbnail'] = thumbnail($l['url']);
$l['localdate']=linkdate2locale($l['linkdate']);
if (startsWith($l['url'],'?')) $l['url']=indexUrl().$l['url']; // make permalink URL absolute
$links[$linkdate]=$l;
}
// Then build the HTML for this day:
$tpl = new RainTPL;
$tpl->assign('links',$links);
$html = $tpl->draw('dailyrss',$return_string=true);
echo "\n";
echo '<description><![CDATA['.$html.']]></description>'."\n</item>\n\n";
}
echo '</channel></rss><!-- Cached version of '.pageUrl().' -->';
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// "Daily" page.
function showDaily()
{
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
$day=Date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
if (isset($_GET['day'])) $day=$_GET['day'];
$days = $LINKSDB->days();
$i = array_search($day,$days);
if ($i==false) { $i=count($days)-1; $day=$days[$i]; }
$previousday='';
$nextday='';
if ($i!==false)
{
if ($i>1) $previousday=$days[$i-1];
if ($i<count($days)-1) $nextday=$days[$i+1];
}
$linksToDisplay=$LINKSDB->filterDay($day);
// We pre-format some fields for proper output.
foreach($linksToDisplay as $key=>$link)
{
$taglist = explode(' ',$link['tags']);
uasort($taglist, 'strcasecmp');
$linksToDisplay[$key]['taglist']=$taglist;
$linksToDisplay[$key]['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))));
$linksToDisplay[$key]['thumbnail'] = thumbnail($link['url']);
}
/* We need to spread the articles on 3 columns.
I did not want to use a javascript lib like http://masonry.desandro.com/
so I manually spread entries with a simple method: I roughly evaluate the
height of a div according to title and description length.
*/
$columns=array(array(),array(),array()); // Entries to display, for each column.
$fill=array(0,0,0); // Rough estimate of columns fill.
foreach($linksToDisplay as $key=>$link)
{
// Roughly estimate length of entry (by counting characters)
// Title: 30 chars = 1 line. 1 line is 30 pixels height.
// Description: 836 characters gives roughly 342 pixel height.
// This is not perfect, but it's usually ok.
$length=strlen($link['title'])+(342*strlen($link['description']))/836;
if ($link['thumbnail']) $length +=100; // 1 thumbnails roughly takes 100 pixels height.
// Then put in column which is the less filled:
$smallest=min($fill); // find smallest value in array.
$index=array_search($smallest,$fill); // find index of this smallest value.
array_push($columns[$index],$link); // Put entry in this column.
$fill[$index]+=$length;
}
$PAGE = new pageBuilder;
$PAGE->assign('linksToDisplay',$linksToDisplay);
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('col1',$columns[0]);
$PAGE->assign('col1',$columns[0]);
$PAGE->assign('col2',$columns[1]);
$PAGE->assign('col3',$columns[2]);
$PAGE->assign('day',utf8_encode(strftime('%A %d, %B %Y',linkdate2timestamp($day.'_000000'))));
$PAGE->assign('previousday',$previousday);
$PAGE->assign('nextday',$nextday);
$PAGE->renderPage('daily');
exit;
}
// ------------------------------------------------------------------------------------------
// Render HTML page (according to URL parameters and user rights)
function renderPage()
{
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
// -------- Display login form.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=login'))
{
if ($GLOBALS['config']['OPEN_SHAARLI']) { header('Location: ?'); exit; } // No need to login for open Shaarli
$token=''; if (ban_canLogin()) $token=getToken(); // Do not waste token generation if not useful.
$PAGE = new pageBuilder;
$PAGE->assign('token',$token);
$PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER']:''));
$PAGE->renderPage('loginform');
exit;
}
// -------- User wants to logout.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=logout'))
{
invalidateCaches();
logout();
header('Location: ?');
exit;
}
// -------- Picture wall
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=picwall'))
{
// Optionnaly filter the results:
$links=array();
if (!empty($_GET['searchterm'])) $links = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $links = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $links = $LINKSDB;
$body='';
$linksToDisplay=array();
// Get only links which have a thumbnail.
foreach($links as $link)
{
$permalink='?'.htmlspecialchars(smallhash($link['linkdate']),ENT_QUOTES);
$thumb=lazyThumbnail($link['url'],$permalink);
if ($thumb!='') // Only output links which have a thumbnail.
{
$link['thumbnail']=$thumb; // Thumbnail HTML code.
$link['permalink']=$permalink;
$linksToDisplay[]=$link; // Add to array.
}
}
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('linksToDisplay',$linksToDisplay);
$PAGE->renderPage('picwall');
exit;
}
// -------- Tag cloud
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tagcloud'))
{
$tags= $LINKSDB->allTags();
// We sort tags alphabetically, then choose a font size according to count.
// First, find max value.
$maxcount=0; foreach($tags as $key=>$value) $maxcount=max($maxcount,$value);
ksort($tags);
$tagList=array();
foreach($tags as $key=>$value)
{
$tagList[$key] = array('count'=>$value,'size'=>max(40*$value/$maxcount,8));
}
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('tags',$tagList);
$PAGE->renderPage('tagcloud');
exit;
}
// -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
if (isset($_GET['addtag']))
{
// Get previous URL (http_referer) and add the tag to the searchtags parameters in query.
if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?searchtags='.urlencode($_GET['addtag'])); exit; } // In case browser does not send HTTP_REFERER
parse_str(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_QUERY), $params);
$params['searchtags'] = (empty($params['searchtags']) ? trim($_GET['addtag']) : trim($params['searchtags']).' '.trim($_GET['addtag']));
unset($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.
if (empty($_SERVER['HTTP_REFERER'])) { header('Location: ?'); exit; } // In case browser does not send HTTP_REFERER
parse_str(parse_url($_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'])); }
// Make sure the referer is from Shaarli itself.
$referer = '?';
if (!empty($_SERVER['HTTP_REFERER']) && strcmp(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_HOST),$_SERVER['HTTP_HOST'])==0)
$referer = $_SERVER['HTTP_REFERER'];
header('Location: '.$referer);
exit;
}
// -------- User wants to see only private links (toggle)
if (isset($_GET['privateonly']))
{
if (empty($_SESSION['privateonly']))
{
$_SESSION['privateonly']=1; // See only private links
}
else
{
unset($_SESSION['privateonly']); // See all links
}
// Make sure the referer is from Shaarli itself.
$referer = '?';
if (!empty($_SERVER['HTTP_REFERER']) && strcmp(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_HOST),$_SERVER['HTTP_HOST'])==0)
$referer = $_SERVER['HTTP_REFERER'];
header('Location: '.$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']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
exit;
}
$PAGE = new pageBuilder;
buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
$PAGE->renderPage('linklist');
exit; // Never remove this one ! All operations below are reserved for logged in user.
}
// -------- All other functions are reserved for the registered user:
// -------- Display the Tools menu if requested (import/export/bookmarklet...)
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=tools'))
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('pageabsaddr',indexUrl());
$PAGE->renderPage('tools');
exit;
}
// -------- User wants to change his/her password.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changepasswd'))
{
if ($GLOBALS['config']['OPEN_SHAARLI']) die('You are not supposed to change a password on an Open Shaarli.');
if (!empty($_POST['setpassword']) && !empty($_POST['oldpassword']))
{
if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
// Make sure old password is correct.
$oldhash = sha1($_POST['oldpassword'].$GLOBALS['login'].$GLOBALS['salt']);
if ($oldhash!=$GLOBALS['hash']) { echo '<script language="JavaScript">alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
// Save new password
$GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
$GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
writeConfig();
echo '<script language="JavaScript">alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
exit;
}
else // show the change password form.
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->renderPage('changepassword');
exit;
}
}
// -------- User wants to change configuration
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=configure'))
{
if (!empty($_POST['title']) )
{
if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
$tz = 'UTC';
if (!empty($_POST['continent']) && !empty($_POST['city']))
if (isTZvalid($_POST['continent'],$_POST['city']))
$tz = $_POST['continent'].'/'.$_POST['city'];
$GLOBALS['timezone'] = $tz;
$GLOBALS['title']=$_POST['title'];
$GLOBALS['redirector']=$_POST['redirector'];
$GLOBALS['disablesessionprotection']=!empty($_POST['disablesessionprotection']);
$GLOBALS['disablejquery']=!empty($_POST['disablejquery']);
$GLOBALS['privateLinkByDefault']=!empty($_POST['privateLinkByDefault']);
writeConfig();
echo '<script language="JavaScript">alert("Configuration was saved.");document.location=\'?do=tools\';</script>';
exit;
}
else // Show the configuration form.
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->assign('title',htmlspecialchars( empty($GLOBALS['title']) ? '' : $GLOBALS['title'] , ENT_QUOTES));
$PAGE->assign('redirector',htmlspecialchars( empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'] , ENT_QUOTES));
list($timezone_form,$timezone_js) = templateTZform($GLOBALS['timezone']);
$PAGE->assign('timezone_form',$timezone_form); // FIXME: put entire tz form generation in template ?
$PAGE->assign('timezone_js',$timezone_js);
$PAGE->renderPage('configure');
exit;
}
}
// -------- User wants to rename a tag or delete it
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=changetag'))
{
if (empty($_POST['fromtag']))
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->renderPage('changetag');
exit;
}
if (!tokenOk($_POST['token'])) die('Wrong token.');
// Delete a tag:
if (!empty($_POST['deletetag']) && !empty($_POST['fromtag']))
{
$needle=trim($_POST['fromtag']);
$linksToAlter = $LINKSDB->filterTags($needle,true); // true for case-sensitive tag search.
foreach($linksToAlter as $key=>$value)
{
$tags = explode(' ',trim($value['tags']));
unset($tags[array_search($needle,$tags)]); // Remove tag.
$value['tags']=trim(implode(' ',$tags));
$LINKSDB[$key]=$value;
}
$LINKSDB->savedb(); // save to disk
echo '<script language="JavaScript">alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
exit;
}
// Rename a tag:
if (!empty($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag']))
{
$needle=trim($_POST['fromtag']);
$linksToAlter = $LINKSDB->filterTags($needle,true); // true for case-sensitive tag search.
foreach($linksToAlter as $key=>$value)
{
$tags = explode(' ',trim($value['tags']));
$tags[array_search($needle,$tags)] = trim($_POST['totag']); // Remplace tags value.
$value['tags']=trim(implode(' ',$tags));
$LINKSDB[$key]=$value;
}
$LINKSDB->savedb(); // save to disk
echo '<script language="JavaScript">alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>';
exit;
}
}
// -------- User wants to add a link without using the bookmarklet: show form.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=addlink'))
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->renderPage('addlink');
exit;
}
// -------- User clicked the "Save" button when editing a link: Save link to database.
if (isset($_POST['save_edit']))
{
if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away !
$tags = trim(preg_replace('/\s\s+/',' ', $_POST['lf_tags'])); // Remove multiple spaces.
$linkdate=$_POST['lf_linkdate'];
$url = trim($_POST['lf_url']);
if (!startsWith($url,'http:') && !startsWith($url,'https:') && !startsWith($url,'ftp:') && !startsWith($url,'magnet:') && !startsWith($url,'?'))
$url = 'http://'.$url;
$link = array('title'=>trim($_POST['lf_title']),'url'=>$url,'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
'linkdate'=>$linkdate,'tags'=>str_replace(',',' ',$tags));
if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
$LINKSDB[$linkdate] = $link;
$LINKSDB->savedb(); // save to disk
pubsubhub();
// If we are called from the bookmarklet, we must close the popup:
if (isset($_GET['source']) && $_GET['source']=='bookmarklet') { echo '<script language="JavaScript">self.close();</script>'; exit; }
$returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
$returnurl .= '#'.smallHash($linkdate); // Scroll to the link which has been edited.
header('Location: '.$returnurl); // After saving the link, redirect to the page the user was on.
exit;
}
// -------- User clicked the "Cancel" button when editing a link.
if (isset($_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'] : '?' );
$returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited.
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']) ? $_POST['returnurl'] : '?' );
if ($returnurl=='?') { $returnurl = (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '?'); }
header('Location: '.$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.
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('link',$link);
$PAGE->assign('link_is_new',false);
$PAGE->assign('token',getToken()); // XSRF protection.
$PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : ''));
$PAGE->renderPage('editlink');
exit;
}
// -------- User want to post a new link: Display link edit form.
if (isset($_GET['post']))
{
$url=$_GET['post'];
// We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
$i=strpos($url,'&utm_source='); if ($i!==false) $url=substr($url,0,$i);
$i=strpos($url,'?utm_source='); if ($i!==false) $url=substr($url,0,$i);
$i=strpos($url,'#xtor=RSS-'); if ($i!==false) $url=substr($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).
$description = (empty($_GET['description']) ? '' : $_GET['description'] )."\n"; // Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
$tags=''; $private=0;
if (($url!='') && 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 specified in either 1) HTTP response headers or 2) <head> in html
if (strpos($status,'200 OK')!==false)
{
// Look for charset in html header.
preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
// If found, extract encoding.
if (!empty($meta[0]))
{
// Get encoding specified in header.
preg_match('#charset="?(.*)"#si', $meta[0], $enc);
// If charset not found, use utf-8.
$html_charset = (!empty($enc[1])) ? strtolower($enc[1]) : 'utf-8';
}
else { $html_charset = 'utf-8'; }
// Extract title
$title = html_extract_title($data);
if (!empty($title))
{
// Re-encode title in utf-8 if necessary.
$title = ($html_charset == 'iso-8859-1') ? utf8_encode($title) : $title;
}
}
}
if ($url=='') $url='?'.smallHash($linkdate); // In case of empty URL, this is just a text (with a link that point to itself)
$link = array('linkdate'=>$linkdate,'title'=>$title,'url'=>$url,'description'=>$description,'tags'=>$tags,'private'=>0);
}
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('link',$link);
$PAGE->assign('link_is_new',$link_is_new);
$PAGE->assign('token',getToken()); // XSRF protection.
$PAGE->assign('http_referer',(isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : ''));
$PAGE->renderPage('editlink');
exit;
}
// -------- Export as Netscape Bookmarks HTML file.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=export'))
{
if (empty($_GET['what']))
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->renderPage('export');
exit;
}
$exportWhat=$_GET['what'];
if (!array_intersect(array('all','public','private'),array($exportWhat))) die('What are you trying to export ???');
header('Content-Type: text/html; charset=utf-8');
header('Content-disposition: attachment; filename=bookmarks_'.$exportWhat.'_'.strval(date('Ymd_His')).'.html');
$currentdate=date('Y/m/d H:i:s');
echo <<<HTML
<!DOCTYPE NETSCAPE-Bookmark-file-1>
<!-- This is an automatically generated file.
It will be read and overwritten.
DO NOT EDIT! -->
<!-- Shaarli {$exportWhat} bookmarks export on {$currentdate} -->
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
<TITLE>Bookmarks</TITLE>
<H1>Bookmarks</H1>
HTML;
foreach($LINKSDB as $link)
{
if ($exportWhat=='all' ||
($exportWhat=='private' && $link['private']!=0) ||
($exportWhat=='public' && $link['private']==0))
{
echo '<DT><A HREF="'.htmlspecialchars($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($link['description'])."\n";
}
}
exit;
}
// -------- User is uploading a file for import
if (isset($_SERVER["QUERY_STRING"]) && 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($_POST['token'])) die('Wrong token.');
importFile();
exit;
}
// -------- Show upload/import dialog:
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=import'))
{
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->assign('maxfilesize',getMaxFileSize());
$PAGE->renderPage('import');
exit;
}
// -------- Otherwise, simply display search form and links:
$PAGE = new pageBuilder;
$PAGE->assign('linkcount',count($LINKSDB));
buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
$PAGE->renderPage('linklist');
exit;
}
// -----------------------------------------------------------------------------------------------
// Process the import file form.
function importFile()
{
if (!(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI'])) { die('Not allowed.'); }
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
$filename=$_FILES['filetoupload']['name'];
$filesize=$_FILES['filetoupload']['size'];
$data=file_get_contents($_FILES['filetoupload']['tmp_name']);
$private = (empty($_POST['private']) ? 0 : 1); // Should the links be imported as private ?
$overwrite = !empty($_POST['overwrite']) ; // Should the imported links overwrite existing ones ?
$import_count=0;
// 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.
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]) ? html_entity_decode(trim($d[1]),ENT_QUOTES,'UTF-8') : ''); // Get description (optional)
preg_match('!<A .*?>(.*?)</A>!i',$d[0],$matches); $link['title'] = (isset($matches[1]) ? trim($matches[1]) : ''); // Get title
$link['title'] = html_entity_decode($link['title'],ENT_QUOTES,'UTF-8');
preg_match_all('! ([A-Z_]+)=\"(.*?)"!i',$html,$matches,PREG_SET_ORDER); // Get all other attributes
$raw_add_date=0;
foreach($matches as $m)
{
$attr=$m[1]; $value=$m[2];
if ($attr=='HREF') $link['url']=html_entity_decode($value,ENT_QUOTES,'UTF-8');
elseif ($attr=='ADD_DATE')
{
$raw_add_date=intval($value);
if ($raw_add_date>30000000000) $raw_add_date/=1000; //If larger than year 2920, then was likely stored in milliseconds instead of seconds
}
elseif ($attr=='PRIVATE') $link['private']=($value=='0'?0:1);
elseif ($attr=='TAGS') $link['tags']=html_entity_decode(str_replace(',',' ',$value),ENT_QUOTES,'UTF-8');
}
if ($link['url']!='')
{
if ($private==1) $link['private']=1;
$dblink = $LINKSDB->getLinkFromUrl($link['url']); // See if the link is already in database.
if ($dblink==false)
{ // Link not in database, let's import it...
if (empty($raw_add_date)) $raw_add_date=time(); // In case of shitty bookmark file with no ADD_DATE
// Make sure date/time is not already used by another link.
// (Some bookmark files have several different links with the same ADD_DATE)
// We increment date by 1 second until we find a date which is not used in db.
// (so that links that have the same date/time are more or less kept grouped by date, but do not conflict.)
while (!empty($LINKSDB[date('Ymd_His',$raw_add_date)])) { $raw_add_date++; }// Yes, I know it's ugly.
$link['linkdate']=date('Ymd_His',$raw_add_date);
$LINKSDB[$link['linkdate']] = $link;
$import_count++;
}
else // link already present in database.
{
if ($overwrite)
{ // If overwrite is required, we import link data, except date/time.
$link['linkdate']=$dblink['linkdate'];
$LINKSDB[$link['linkdate']] = $link;
$import_count++;
}
}
}
}
}
$LINKSDB->savedb();
echo '<script language="JavaScript">alert("File '.$filename.' ('.$filesize.' bytes) was successfully processed: '.$import_count.' links imported.");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 list of links (<div id="linklist">)
// This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
function buildLinkList($PAGE,$LINKSDB)
{
// ---- Filter link database according to parameters
$linksToDisplay=array();
$search_type='';
$search_crits='';
if (isset($_GET['searchterm'])) // Fulltext search
{
$linksToDisplay = $LINKSDB->filterFulltext(trim($_GET['searchterm']));
$search_crits=htmlspecialchars(trim($_GET['searchterm']));
$search_type='fulltext';
}
elseif (isset($_GET['searchtags'])) // Search by tag
{
$linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
$search_crits=explode(' ',trim($_GET['searchtags']));
$search_type='tags';
}
elseif (isset($_SERVER['QUERY_STRING']) && preg_match('/[a-zA-Z0-9-_@]{6}(&.+?)?/',$_SERVER['QUERY_STRING'])) // Detect smallHashes in URL
{
$linksToDisplay = $LINKSDB->filterSmallHash(substr(trim($_SERVER["QUERY_STRING"], '/'),0,6));
if (count($linksToDisplay)==0)
{
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
echo '<h1>404 Not found.</h1>Oh crap. The link you are trying to reach does not exist or has been deleted.';
echo '<br>You would mind <a href="?">clicking here</a> ?';
exit;
}
$search_type='permalink';
}
else
$linksToDisplay = $LINKSDB; // otherwise, display without filtering.
// Option: Show only private links
if (!empty($_SESSION['privateonly']))
{
$tmp = array();
foreach($linksToDisplay as $linkdate=>$link)
{
if ($link['private']!=0) $tmp[$linkdate]=$link;
}
$linksToDisplay=$tmp;
}
// ---- 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.
// If there is only a single link, we change on-the-fly the title of the page.
if (count($linksToDisplay)==1) $GLOBALS['pagetitle'] = $linksToDisplay[$keys[0]]['title'].' - '.$GLOBALS['title'];
// Select articles according to paging.
$pagecount = ceil(count($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'];
$linkDisp=array(); // Links to display
while ($i<$end && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$link['description']=nl2br(keepMultipleSpaces(text2clickable(htmlspecialchars($link['description']))));
$title=$link['title'];
$classLi = $i%2!=0 ? '' : 'publicLinkHightLight';
$link['class'] = ($link['private']==0 ? $classLi : 'private');
$link['localdate']=linkdate2locale($link['linkdate']);
$taglist = explode(' ',$link['tags']);
uasort($taglist, 'strcasecmp');
$link['taglist']=$taglist;
$linkDisp[$keys[$i]] = $link;
$i++;
}
// Compute paging navigation
$searchterm= ( empty($_GET['searchterm']) ? '' : '&searchterm='.$_GET['searchterm'] );
$searchtags= ( empty($_GET['searchtags']) ? '' : '&searchtags='.$_GET['searchtags'] );
$paging='';
$previous_page_url=''; if ($i!=count($keys)) $previous_page_url='?page='.($page+1).$searchterm.$searchtags;
$next_page_url='';if ($page>1) $next_page_url='?page='.($page-1).$searchterm.$searchtags;
$token = ''; if (isLoggedIn()) $token=getToken();
// Fill all template fields.
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('previous_page_url',$previous_page_url);
$PAGE->assign('next_page_url',$next_page_url);
$PAGE->assign('page_current',$page);
$PAGE->assign('page_max',$pagecount);
$PAGE->assign('result_count',count($linksToDisplay));
$PAGE->assign('search_type',$search_type);
$PAGE->assign('search_crits',$search_crits);
$PAGE->assign('redirector',empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector']); // optional redirector URL
$PAGE->assign('token',$token);
$PAGE->assign('links',$linkDisp);
return;
}
// Compute the thumbnail for a link.
//
// with a link to the original URL.
// Understands various services (youtube.com...)
// Input: $url = url for which the thumbnail must be found.
// $href = if provided, this URL will be followed instead of $url
// Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
// Some of them may be missing.
// Return an empty array if no thumbnail available.
function computeThumbnail($url,$href=false)
{
if (!$GLOBALS['config']['ENABLE_THUMBNAILS']) return array();
if ($href==false) $href=$url;
// For most hosts, the URL of the thumbnail can be easily deduced from the URL of the link.
// (eg. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
// ^^^^^^^^^^^ ^^^^^^^^^^^
$domain = parse_url($url,PHP_URL_HOST);
if ($domain=='youtube.com' || $domain=='www.youtube.com')
{
parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract video ID and get thumbnail
if (!empty($params['v'])) return array('src'=>'http://img.youtube.com/vi/'.$params['v'].'/default.jpg',
'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
}
if ($domain=='youtu.be') // Youtube short links
{
$path = parse_url($url,PHP_URL_PATH);
return array('src'=>'http://img.youtube.com/vi'.$path.'/default.jpg',
'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
}
if ($domain=='pix.toile-libre.org') // pix.toile-libre.org image hosting
{
parse_str(parse_url($url,PHP_URL_QUERY), $params); // Extract image filename.
if (!empty($params) && !empty($params['img'])) return array('src'=>'http://pix.toile-libre.org/upload/thumb/'.urlencode($params['img']),
'href'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
}
if ($domain=='imgur.com')
{
$path = parse_url($url,PHP_URL_PATH);
if (startsWith($path,'/a/')) return array(); // Thumbnails for albums are not available.
if (startsWith($path,'/r/')) return array('src'=>'http://i.imgur.com/'.basename($path).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (startsWith($path,'/gallery/')) return array('src'=>'http://i.imgur.com'.substr($path,8).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (substr_count($path,'/')==1) return array('src'=>'http://i.imgur.com/'.substr($path,1).'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
}
if ($domain=='i.imgur.com')
{
$pi = pathinfo(parse_url($url,PHP_URL_PATH));
if (!empty($pi['filename'])) return array('src'=>'http://i.imgur.com/'.$pi['filename'].'s.jpg',
'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
}
if ($domain=='dailymotion.com' || $domain=='www.dailymotion.com')
{
if (strpos($url,'dailymotion.com/video/')!==false)
{
$thumburl=str_replace('dailymotion.com/video/','dailymotion.com/thumbnail/video/',$url);
return array('src'=>$thumburl,
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'DailyMotion thumbnail');
}
}
if (endsWith($domain,'.imageshack.us'))
{
$ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
{
$thumburl = substr($url,0,strlen($url)-strlen($ext)).'th.'.$ext;
return array('src'=>$thumburl,
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'imageshack.us thumbnail');
}
}
// Some other hosts are SLOW AS HELL and usually require an extra HTTP request to get the thumbnail URL.
// So we deport the thumbnail generation in order not to slow down page generation
// (and we also cache the thumbnail)
if (!$GLOBALS['config']['ENABLE_LOCALCACHE']) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
if ($domain=='flickr.com' || endsWith($domain,'.flickr.com')
|| $domain=='vimeo.com'
|| $domain=='ted.com' || endsWith($domain,'.ted.com')
|| $domain=='xkcd.com' || endsWith($domain,'.xkcd.com')
)
{
if ($domain=='vimeo.com')
{ // Make sure this vimeo url points to a video (/xxx... where xxx is numeric)
$path = parse_url($url,PHP_URL_PATH);
if (!preg_match('!/\d+.+?!',$path)) return array(); // This is not a single video URL.
}
if ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
{ // Make sure this url points to a single comic (/xxx... where xxx is numeric)
$path = parse_url($url,PHP_URL_PATH);
if (!preg_match('!/\d+.+?!',$path)) return array();
}
if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{ // Make sure this TED url points to a video (/talks/...)
$path = parse_url($url,PHP_URL_PATH);
if ("/talks/" !== substr($path,0,7)) return array(); // This is not a single video URL.
}
$sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>indexUrl().'?do=genthumbnail&hmac='.htmlspecialchars($sign).'&url='.urlencode($url),
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
}
// For all other, we try to make a thumbnail of links ending with .jpg/jpeg/png/gif
// Technically speaking, we should download ALL links and check their Content-Type to see if they are images.
// But using the extension will do.
$ext=strtolower(pathinfo($url,PATHINFO_EXTENSION));
if ($ext=='jpg' || $ext=='jpeg' || $ext=='png' || $ext=='gif')
{
$sign = hash_hmac('sha256', $url, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>indexUrl().'?do=genthumbnail&hmac='.htmlspecialchars($sign).'&url='.urlencode($url),
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
}
return array(); // No thumbnail.
}
// Returns the HTML code to display a thumbnail for a link
// with a link to the original URL.
// Understands various services (youtube.com...)
// Input: $url = url for which the thumbnail must be found.
// $href = if provided, this URL will be followed instead of $url
// Returns '' if no thumbnail available.
function thumbnail($url,$href=false)
{
$t = computeThumbnail($url,$href);
if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
$html='<a href="'.htmlspecialchars($t['href']).'"><img src="'.htmlspecialchars($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
$html.='></a>';
return $html;
}
// Returns the HTML code to display a thumbnail for a link
// for the picture wall (using lazy image loading)
// Understands various services (youtube.com...)
// Input: $url = url for which the thumbnail must be found.
// $href = if provided, this URL will be followed instead of $url
// Returns '' if no thumbnail available.
function lazyThumbnail($url,$href=false)
{
$t = computeThumbnail($url,$href);
if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
$html='<a href="'.htmlspecialchars($t['href']).'">';
// Lazy image (only loaded by javascript when in the viewport).
if (!empty($GLOBALS['disablejquery'])) // (except if jQuery is disabled)
$html.='<img class="lazyimage" src="'.htmlspecialchars($t['src']).'"';
else
$html.='<img class="lazyimage" src="#" data-original="'.htmlspecialchars($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
$html.='>';
// No-javascript fallback.
$html.='<noscript><img src="'.htmlspecialchars($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.htmlspecialchars($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.htmlspecialchars($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.htmlspecialchars($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.htmlspecialchars($t['alt']).'"';
$html.='></noscript></a>';
return $html;
}
// -----------------------------------------------------------------------------------------------
// Installation
// This function should NEVER be called if the file data/config.php exists.
function install()
{
// On free.fr host, make sure the /sessions directory exists, otherwise login will not work.
if (endsWith($_SERVER['HTTP_HOST'],'.free.fr') && !is_dir($_SERVER['DOCUMENT_ROOT'].'/sessions')) mkdir($_SERVER['DOCUMENT_ROOT'].'/sessions',0705);
// This part makes sure sessions works correctly.
// (Because on some hosts, session.save_path may not be set correctly,
// or we may not have write access to it.)
if (isset($_GET['test_session']) && ( !isset($_SESSION) || !isset($_SESSION['session_tested']) || $_SESSION['session_tested']!='Working'))
{ // Step 2: Check if data in session is correct.
echo '<pre>Sessions do not seem to work correctly on your server.<br>';
echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
echo 'It currently points to '.session_save_path().'<br><br><a href="?">Click to try again.</a></pre>';
die;
}
if (!isset($_SESSION['session_tested']))
{ // Step 1 : Try to store data in session and reload page.
$_SESSION['session_tested'] = 'Working'; // Try to set a variable in session.
header('Location: '.indexUrl().'?test_session'); // Redirect to check stored data.
}
if (isset($_GET['test_session']))
{ // Step 3: Sessions are ok. Remove test parameter from URL.
header('Location: '.indexUrl());
}
if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
{
$tz = 'UTC';
if (!empty($_POST['continent']) && !empty($_POST['city']))
if (isTZvalid($_POST['continent'],$_POST['city']))
$tz = $_POST['continent'].'/'.$_POST['city'];
$GLOBALS['timezone'] = $tz;
// Everything is ok, let's create config file.
$GLOBALS['login'] = $_POST['setlogin'];
$GLOBALS['salt'] = sha1(uniqid('',true).'_'.mt_rand()); // Salt renders rainbow-tables attacks useless.
$GLOBALS['hash'] = sha1($_POST['setpassword'].$GLOBALS['login'].$GLOBALS['salt']);
$GLOBALS['title'] = (empty($_POST['title']) ? 'Shared links on '.htmlspecialchars(indexUrl()) : $_POST['title'] );
writeConfig();
echo '<script language="JavaScript">alert("Shaarli is now configured. Please enter your login/password and start shaaring your links !");document.location=\'?do=login\';</script>';
exit;
}
// Display config form:
list($timezone_form,$timezone_js) = templateTZform();
$timezone_html=''; if ($timezone_form!='') $timezone_html='<tr><td valign="top"><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
$PAGE = new pageBuilder;
$PAGE->assign('timezone_html',$timezone_html);
$PAGE->assign('timezone_js',$timezone_js);
$PAGE->renderPage('install');
exit;
}
// Generates the timezone selection form and javascript.
// Input: (optional) current timezone (can be 'UTC/UTC'). It will be pre-selected.
// Output: array(html,js)
// Example: list($htmlform,$js) = templateTZform('Europe/Paris'); // Europe/Paris pre-selected.
// Returns array('','') if server does not support timezones list. (eg. php 5.1 on free.fr)
function templateTZform($ptz=false)
{
if (function_exists('timezone_identifiers_list')) // because of old php version (5.1) which can be found on free.fr
{
// Try to split the provided timezone.
if ($ptz==false) { $l=timezone_identifiers_list(); $ptz=$l[0]; }
$spos=strpos($ptz,'/'); $pcontinent=substr($ptz,0,$spos); $pcity=substr($ptz,$spos+1);
// Display config form:
$timezone_form = '';
$timezone_js = '';
// The list is in the forme "Europe/Paris", "America/Argentina/Buenos_Aires"...
// We split the list in continents/cities.
$continents = array();
$cities = array();
foreach(timezone_identifiers_list() as $tz)
{
if ($tz=='UTC') $tz='UTC/UTC';
$spos = strpos($tz,'/');
if ($spos!==false)
{
$continent=substr($tz,0,$spos); $city=substr($tz,$spos+1);
$continents[$continent]=1;
if (!isset($cities[$continent])) $cities[$continent]='';
$cities[$continent].='<option value="'.$city.'"'.($pcity==$city?'selected':'').'>'.$city.'</option>';
}
}
$continents_html = '';
$continents = array_keys($continents);
foreach($continents as $continent)
$continents_html.='<option value="'.$continent.'"'.($pcontinent==$continent?'selected':'').'>'.$continent.'</option>';
$cities_html = $cities[$pcontinent];
$timezone_form = "Continent: <select name=\"continent\" id=\"continent\" onChange=\"onChangecontinent();\">${continents_html}</select>";
$timezone_form .= " City: <select name=\"city\" id=\"city\">${cities[$pcontinent]}</select><br />";
$timezone_js = "<script language=\"JavaScript\">";
$timezone_js .= "function onChangecontinent(){document.getElementById(\"city\").innerHTML = citiescontinent[document.getElementById(\"continent\").value];}";
$timezone_js .= "var citiescontinent = ".json_encode($cities).";" ;
$timezone_js .= "</script>" ;
return array($timezone_form,$timezone_js);
}
return array('','');
}
// Tells if a timezone is valid or not.
// If not valid, returns false.
// If system does not support timezone list, returns false.
function isTZvalid($continent,$city)
{
$tz = $continent.'/'.$city;
if (function_exists('timezone_identifiers_list')) // because of old php version (5.1) which can be found on free.fr
{
if (in_array($tz, timezone_identifiers_list())) // it's a valid timezone ?
return true;
}
return false;
}
// Webservices (for use with jQuery/jQueryUI)
// eg. index.php?ws=tags&term=minecr
function processWS()
{
if (empty($_GET['ws']) || empty($_GET['term'])) return;
$term = $_GET['term'];
$LINKSDB=new linkdb(isLoggedIn() || $GLOBALS['config']['OPEN_SHAARLI']); // Read links from database (and filter private links if used it not logged in).
header('Content-Type: application/json; charset=utf-8');
// Search in tags (case insentitive, cumulative search)
if ($_GET['ws']=='tags')
{
$tags=explode(' ',str_replace(',',' ',$term)); $last = array_pop($tags); // Get the last term ("a b c d" ==> "a b c", "d")
$addtags=''; if ($tags) $addtags=implode(' ',$tags).' '; // We will pre-pend previous tags
$suggested=array();
/* To speed up things, we store list of tags in session */
if (empty($_SESSION['tags'])) $_SESSION['tags'] = $LINKSDB->allTags();
foreach($_SESSION['tags'] as $key=>$value)
{
if (startsWith($key,$last,$case=false) && !in_array($key,$tags)) $suggested[$addtags.$key.' ']=0;
}
echo json_encode(array_keys($suggested));
exit;
}
// Search a single tag (case sentitive, single tag search)
if ($_GET['ws']=='singletag')
{
/* To speed up things, we store list of tags in session */
if (empty($_SESSION['tags'])) $_SESSION['tags'] = $LINKSDB->allTags();
foreach($_SESSION['tags'] as $key=>$value)
{
if (startsWith($key,$term,$case=true)) $suggested[$key]=0;
}
echo json_encode(array_keys($suggested));
exit;
}
}
// Re-write configuration file according to globals.
// Requires some $GLOBALS to be set (login,hash,salt,title).
// If the config file cannot be saved, an error message is dislayed and the user is redirected to "Tools" menu.
// (otherwise, the function simply returns.)
function writeConfig()
{
if (is_file($GLOBALS['config']['CONFIG_FILE']) && !isLoggedIn()) die('You are not authorized to alter config.'); // Only logged in user can alter config.
$config='<?php $GLOBALS[\'login\']='.var_export($GLOBALS['login'],true).'; $GLOBALS[\'hash\']='.var_export($GLOBALS['hash'],true).'; $GLOBALS[\'salt\']='.var_export($GLOBALS['salt'],true).'; ';
$config .='$GLOBALS[\'timezone\']='.var_export($GLOBALS['timezone'],true).'; date_default_timezone_set('.var_export($GLOBALS['timezone'],true).'); $GLOBALS[\'title\']='.var_export($GLOBALS['title'],true).';';
$config .= '$GLOBALS[\'redirector\']='.var_export($GLOBALS['redirector'],true).'; ';
$config .= '$GLOBALS[\'disablesessionprotection\']='.var_export($GLOBALS['disablesessionprotection'],true).'; ';
$config .= '$GLOBALS[\'disablejquery\']='.var_export($GLOBALS['disablejquery'],true).'; ';
$config .= '$GLOBALS[\'privateLinkByDefault\']='.var_export($GLOBALS['privateLinkByDefault'],true).'; ';
$config .= ' ?>';
if (!file_put_contents($GLOBALS['config']['CONFIG_FILE'],$config) || strcmp(file_get_contents($GLOBALS['config']['CONFIG_FILE']),$config)!=0)
{
echo '<script language="JavaScript">alert("Shaarli could not create the config file. Please make sure Shaarli has the right to write in the folder is it installed in.");document.location=\'?\';</script>';
exit;
}
}
/* Because some f*cking services like Flickr require an extra HTTP request to get the thumbnail URL,
I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
The following function takes the URL a link (eg. a flickr page) and return the proper thumbnail.
This function is called by passing the url:
http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
[URL] is the URL of the link (eg. a flickr page)
[HMAC] is the signature for the [URL] (so that these URL cannot be forged).
The function below will fetch the image from the webservice and store it in the cache.
*/
function genThumbnail()
{
// Make sure the parameters in the URL were generated by us.
$sign = hash_hmac('sha256', $_GET['url'], $GLOBALS['salt']);
if ($sign!=$_GET['hmac']) die('Naughty boy !');
// Let's see if we don't already have the image for this URL in the cache.
$thumbname=hash('sha1',$_GET['url']).'.jpg';
if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$thumbname))
{ // We have the thumbnail, just serve it:
header('Content-Type: image/jpeg');
echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname);
return;
}
// We may also serve a blank image (if service did not respond)
$blankname=hash('sha1',$_GET['url']).'.gif';
if (is_file($GLOBALS['config']['CACHEDIR'].'/'.$blankname))
{
header('Content-Type: image/gif');
echo file_get_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname);
return;
}
// Otherwise, generate the thumbnail.
$url = $_GET['url'];
$domain = parse_url($url,PHP_URL_HOST);
if ($domain=='flickr.com' || endsWith($domain,'.flickr.com'))
{
// Crude replacement to handle new Flickr domain policy (They prefer www. now)
$url = str_replace('http://flickr.com/','http://www.flickr.com/',$url);
// Is this a link to an image, or to a flickr page ?
$imageurl='';
if (endswith(parse_url($url,PHP_URL_PATH),'.jpg'))
{ // This is a direct link to an image. eg. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
preg_match('!(http://farm\d+\.staticflickr\.com/\d+/\d+_\w+_)\w.jpg!',$url,$matches);
if (!empty($matches[1])) $imageurl=$matches[1].'m.jpg';
}
else // this is a flickr page (html)
{
list($httpstatus,$headers,$data) = getHTTP($url,20); // Get the flickr html page.
if (strpos($httpstatus,'200 OK')!==false)
{
// Flickr now nicely provides the URL of the thumbnail in each flickr page.
preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!',$data,$matches);
if (!empty($matches[1])) $imageurl=$matches[1];
// In albums (and some other pages), the link rel="image_src" is not provided,
// but flickr provides:
// <meta property="og:image" content="http://farm4.staticflickr.com/3398/3239339068_25d13535ff_z.jpg" />
if ($imageurl=='')
{
preg_match('!<meta property=\"og:image\" content=\"(.+?)\"!',$data,$matches);
if (!empty($matches[1])) $imageurl=$matches[1];
}
}
}
if ($imageurl!='')
{ // Let's download the image.
list($httpstatus,$headers,$data) = getHTTP($imageurl,10); // Image is 240x120, so 10 seconds to download should be enough.
if (strpos($httpstatus,'200 OK')!==false)
{
file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache.
header('Content-Type: image/jpeg');
echo $data;
return;
}
}
}
elseif ($domain=='vimeo.com' )
{
// This is more complex: we have to perform a HTTP request, then parse the result.
// Maybe we should deport this to javascript ? Example: http://stackoverflow.com/questions/1361149/get-img-thumbnails-from-vimeo/4285098#4285098
$vid = substr(parse_url($url,PHP_URL_PATH),1);
list($httpstatus,$headers,$data) = getHTTP('http://vimeo.com/api/v2/video/'.htmlspecialchars($vid).'.php',5);
if (strpos($httpstatus,'200 OK')!==false)
{
$t = unserialize($data);
$imageurl = $t[0]['thumbnail_medium'];
// Then we download the image and serve it to our client.
list($httpstatus,$headers,$data) = getHTTP($imageurl,10);
if (strpos($httpstatus,'200 OK')!==false)
{
file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache.
header('Content-Type: image/jpeg');
echo $data;
return;
}
}
}
elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{
// The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
// http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
// <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
list($httpstatus,$headers,$data) = getHTTP($url,5);
if (strpos($httpstatus,'200 OK')!==false)
{
// Extract the link to the thumbnail
preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!',$data,$matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough.
if (strpos($httpstatus,'200 OK')!==false)
{
$filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
file_put_contents($filepath,$data); // Save image to cache.
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
}
}
elseif ($domain=='xkcd.com' || endsWith($domain,'.xkcd.com'))
{
// There is no thumbnail available for xkcd comics, so download the whole image and resize it.
// http://xkcd.com/327/
// <img src="http://imgs.xkcd.com/comics/exploits_of_a_mom.png" title="<BLABLA>" alt="<BLABLA>" />
list($httpstatus,$headers,$data) = getHTTP($url,5);
if (strpos($httpstatus,'200 OK')!==false)
{
// Extract the link to the thumbnail
preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!',$data,$matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
list($httpstatus,$headers,$data) = getHTTP($imageurl,20); // No control on image size, so wait long enough.
if (strpos($httpstatus,'200 OK')!==false)
{
$filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
file_put_contents($filepath,$data); // Save image to cache.
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
}
}
else
{
// For all other domains, we try to download the image and make a thumbnail.
list($httpstatus,$headers,$data) = getHTTP($url,30); // We allow 30 seconds max to download (and downloads are limited to 4 Mb)
if (strpos($httpstatus,'200 OK')!==false)
{
$filepath=$GLOBALS['config']['CACHEDIR'].'/'.$thumbname;
file_put_contents($filepath,$data); // Save image to cache.
if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
// Otherwise, return an empty image (8x8 transparent gif)
$blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$blankname,$blankgif); // Also put something in cache so that this URL is not requested twice.
header('Content-Type: image/gif');
echo $blankgif;
}
// Make a thumbnail of the image (to width: 120 pixels)
// Returns true if success, false otherwise.
function resizeImage($filepath)
{
if (!function_exists('imagecreatefromjpeg')) return false; // GD not present: no thumbnail possible.
// Trick: some stupid people rename GIF as JPEG... or else.
// So we really try to open each image type whatever the extension is.
$header=file_get_contents($filepath,false,NULL,0,256); // Read first 256 bytes and try to sniff file type.
$im=false;
$i=strpos($header,'GIF8'); if (($i!==false) && ($i==0)) $im = imagecreatefromgif($filepath); // Well this is crude, but it should be enough.
$i=strpos($header,'PNG'); if (($i!==false) && ($i==1)) $im = imagecreatefrompng($filepath);
$i=strpos($header,'JFIF'); if ($i!==false) $im = imagecreatefromjpeg($filepath);
if (!$im) return false; // Unable to open image (corrupted or not an image)
$w = imagesx($im);
$h = imagesy($im);
$ystart = 0; $yheight=$h;
if ($h>$w) { $ystart= ($h/2)-($w/2); $yheight=$w/2; }
$nw = 120; // Desired width
$nh = min(floor(($h*$nw)/$w),120); // Compute new width/height, but maximum 120 pixels height.
// Resize image:
$im2 = imagecreatetruecolor($nw,$nh);
imagecopyresampled($im2, $im, 0, 0, 0, $ystart, $nw, $nh, $w, $yheight);
imageinterlace($im2,true); // For progressive JPEG.
$tempname=$filepath.'_TEMP.jpg';
imagejpeg($im2, $tempname, 90);
imagedestroy($im);
imagedestroy($im2);
unlink($filepath);
rename($tempname,$filepath); // Overwrite original picture with thumbnail.
return true;
}
// Invalidate caches when the database is changed or the user logs out.
// (eg. tags cache).
function invalidateCaches()
{
unset($_SESSION['tags']); // Purge cache attached to session.
pageCache::purgeCache(); // Purge page cache shared by sessions.
}
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=genthumbnail')) { genThumbnail(); exit; } // Thumbnail generation/cache does not need the link database.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=rss')) { showRSS(); exit; }
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=atom')) { showATOM(); exit; }
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=dailyrss')) { showDailyRSS(); exit; }
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=daily')) { showDaily(); exit; }
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'ws=')) { processWS(); exit; } // Webservices (for jQuery/jQueryUI)
if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=$GLOBALS['config']['LINKS_PER_PAGE'];
renderPage();
?>
