MyShaarli/index.php

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2013-02-26 10:09:41 +01:00
<?php
/**
* Shaarli v0.6.0 - Shaare your links...
*
* The personal, minimalist, super-fast, no-database Delicious clone.
*
* Friendly fork by the Shaarli community:
* - https://github.com/shaarli/Shaarli
*
* Original project by sebsauvage.net:
* - http://sebsauvage.net/wiki/doku.php?id=php:shaarli
* - https://github.com/sebsauvage/Shaarli
*
* Licence: http://www.opensource.org/licenses/zlib-license.php
*
* Requires: PHP 5.3.x
*/
// Set 'UTC' as the default timezone if it is not defined in php.ini
// See http://php.net/manual/en/datetime.configuration.php#ini.date.timezone
if (date_default_timezone_get() == '') {
date_default_timezone_set('UTC');
}
/* -----------------------------------------------------------------------------
* Hardcoded parameters
* You should not touch any code below (or at your own risks!)
* (These parameters can be overwritten by editing the file /data/config.php)
* -----------------------------------------------------------------------------
*/
/*
* Shaarli directories & configuration files
*/
// Data subdirectory
$GLOBALS['config']['DATADIR'] = 'data';
// Main configuration file
$GLOBALS['config']['CONFIG_FILE'] = $GLOBALS['config']['DATADIR'].'/config.php';
// Link datastore
$GLOBALS['config']['DATASTORE'] = $GLOBALS['config']['DATADIR'].'/datastore.php';
// Banned IPs
$GLOBALS['config']['IPBANS_FILENAME'] = $GLOBALS['config']['DATADIR'].'/ipbans.php';
// For updates check of Shaarli
$GLOBALS['config']['UPDATECHECK_FILENAME'] = $GLOBALS['config']['DATADIR'].'/lastupdatecheck.txt';
// RainTPL cache directory (keep the trailing slash!)
$GLOBALS['config']['RAINTPL_TMP'] = 'tmp/';
// Raintpl template directory (keep the trailing slash!)
$GLOBALS['config']['RAINTPL_TPL'] = 'tpl/';
// Thuumbnail cache directory
$GLOBALS['config']['CACHEDIR'] = 'cache';
// Atom & RSS feed cache directory
$GLOBALS['config']['PAGECACHE'] = 'pagecache';
/*
* Global configuration
*/
// Ban IP after this many failures
$GLOBALS['config']['BAN_AFTER'] = 4;
// Ban duration for IP address after login failures (in seconds)
$GLOBALS['config']['BAN_DURATION'] = 1800;
// Feed options
// Enable RSS permalinks by default.
// This corresponds to the default behavior of shaarli before this was added as an option.
$GLOBALS['config']['ENABLE_RSS_PERMALINKS'] = true;
// If true, an extra "ATOM feed" button will be displayed in the toolbar
$GLOBALS['config']['SHOW_ATOM'] = false;
// Link display options
$GLOBALS['config']['HIDE_PUBLIC_LINKS'] = false;
$GLOBALS['config']['HIDE_TIMESTAMPS'] = false;
$GLOBALS['config']['LINKS_PER_PAGE'] = 20;
// Open Shaarli (true): anyone can add/edit/delete links without having to login
$GLOBALS['config']['OPEN_SHAARLI'] = false;
// Thumbnails
// Display thumbnails in links
$GLOBALS['config']['ENABLE_THUMBNAILS'] = true;
// Store thumbnails in a local cache
$GLOBALS['config']['ENABLE_LOCALCACHE'] = true;
// Update check frequency for Shaarli. 86400 seconds=24 hours
$GLOBALS['config']['UPDATECHECK_INTERVAL'] = 86400 ;
/*
* Plugin configuration
*
* Warning: order matters!
*
* These settings may be be overriden in:
* - data/config.php
* - each plugin's configuration file
*/
//$GLOBALS['config']['ENABLED_PLUGINS'] = array(
// 'qrcode', 'archiveorg', 'readityourself', 'demo_plugin', 'playvideos',
// 'wallabag', 'markdown', 'addlink_toolbar',
//);
$GLOBALS['config']['ENABLED_PLUGINS'] = array('qrcode');
//$GLOBALS['plugins']['WALLABAG_URL'] = 'https://demo.wallabag.org/';
// PubSubHubbub support. Put an empty string to disable, or put your hub url here to enable.
$GLOBALS['config']['PUBSUBHUB_URL'] = '';
/*
* PHP configuration
*/
define('shaarli_version', '0.6.0');
// http://server.com/x/shaarli --> /shaarli/
define('WEB_PATH', substr($_SERVER["REQUEST_URI"], 0, 1+strrpos($_SERVER["REQUEST_URI"], '/', 0)));
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// High execution time in case of problematic imports/exports.
ini_set('max_input_time','60');
// Try to set max upload file size and read
ini_set('memory_limit', '128M');
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ini_set('post_max_size', '16M');
ini_set('upload_max_filesize', '16M');
// See all error except warnings
error_reporting(E_ALL^E_WARNING);
// See all errors (for debugging only)
//error_reporting(-1);
/*
* User configuration
*/
if (is_file($GLOBALS['config']['CONFIG_FILE'])) {
require_once $GLOBALS['config']['CONFIG_FILE'];
}
// Shaarli library
require_once 'application/Cache.php';
require_once 'application/CachedPage.php';
require_once 'application/HttpUtils.php';
require_once 'application/LinkDB.php';
require_once 'application/TimeZone.php';
require_once 'application/Url.php';
require_once 'application/Utils.php';
require_once 'application/Config.php';
require_once 'application/PluginManager.php';
require_once 'application/Router.php';
// Ensure the PHP version is supported
try {
checkPHPVersion('5.3', PHP_VERSION);
} catch(Exception $e) {
header('Content-Type: text/plain; charset=utf-8');
echo $e->getMessage();
exit;
}
// Force cookie path (but do not change lifetime)
$cookie = session_get_cookie_params();
$cookiedir = '';
if (dirname($_SERVER['SCRIPT_NAME']) != '/') {
$cookiedir = dirname($_SERVER["SCRIPT_NAME"]).'/';
}
// Set default cookie expiration and path.
session_set_cookie_params($cookie['lifetime'], $cookiedir, $_SERVER['SERVER_NAME']);
// Set session parameters on server side.
// If the user does not access any page within this time, his/her session is considered expired.
define('INACTIVITY_TIMEOUT', 3600); // in seconds.
// Use cookies to store session.
ini_set('session.use_cookies', 1);
// Force cookies for session (phpsessionID forbidden in URL).
ini_set('session.use_only_cookies', 1);
// Prevent PHP form using sessionID in URL if cookies are disabled.
ini_set('session.use_trans_sid', false);
session_name('shaarli');
// Start session if needed (Some server auto-start sessions).
if (session_id() == '') {
session_start();
}
// Regenerate session ID if invalid or not defined in cookie.
if (isset($_COOKIE['shaarli']) && !is_session_id_valid($_COOKIE['shaarli'])) {
session_regenerate_id(true);
$_COOKIE['shaarli'] = session_id();
}
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include "inc/rain.tpl.class.php"; //include Rain TPL
raintpl::$tpl_dir = $GLOBALS['config']['RAINTPL_TPL']; // template directory
raintpl::$cache_dir = $GLOBALS['config']['RAINTPL_TMP']; // cache directory
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$pluginManager = PluginManager::getInstance();
$pluginManager->load($GLOBALS['config']['ENABLED_PLUGINS']);
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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', $_COOKIE);
}
// Prevent caching on client side or proxy: (yes, it's ugly)
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
// Directories creations (Note that your web host may require different rights than 705.)
if (!is_writable(realpath(dirname(__FILE__)))) die('<pre>ERROR: Shaarli does not have the right to write in its own directory.</pre>');
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// Handling of old config file which do not have the new parameters.
if (empty($GLOBALS['title'])) $GLOBALS['title']='Shared links on '.escape(index_url($_SERVER));
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if (empty($GLOBALS['timezone'])) $GLOBALS['timezone']=date_default_timezone_get();
if (empty($GLOBALS['redirector'])) $GLOBALS['redirector']='';
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if (empty($GLOBALS['disablesessionprotection'])) $GLOBALS['disablesessionprotection']=false;
if (empty($GLOBALS['privateLinkByDefault'])) $GLOBALS['privateLinkByDefault']=false;
if (empty($GLOBALS['titleLink'])) $GLOBALS['titleLink']='?';
// I really need to rewrite Shaarli with a proper configuation manager.
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// Run config screen if first run:
if (! is_file($GLOBALS['config']['CONFIG_FILE'])) {
install();
}
$GLOBALS['title'] = !empty($GLOBALS['title']) ? escape($GLOBALS['title']) : '';
$GLOBALS['titleLink'] = !empty($GLOBALS['titleLink']) ? escape($GLOBALS['titleLink']) : '';
$GLOBALS['redirector'] = !empty($GLOBALS['redirector']) ? escape($GLOBALS['redirector']) : '';
// a token depending of deployment salt, user password, and the current ip
define('STAY_SIGNED_IN_TOKEN', sha1($GLOBALS['hash'].$_SERVER["REMOTE_ADDR"].$GLOBALS['salt']));
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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.
//==================================================================================================
// Checking session state (i.e. is the user still logged in)
//==================================================================================================
function setup_login_state() {
if ($GLOBALS['config']['OPEN_SHAARLI']) {
return true;
}
$userIsLoggedIn = false; // By default, we do not consider the user as logged in;
$loginFailure = false; // If set to true, every attempt to authenticate the user will fail. This indicates that an important condition isn't met.
if (!isset($GLOBALS['login'])) {
$userIsLoggedIn = false; // Shaarli is not configured yet.
$loginFailure = true;
}
if (isset($_COOKIE['shaarli_staySignedIn']) &&
$_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
!$loginFailure)
{
fillSessionInfo();
$userIsLoggedIn = true;
}
// If session does not exist on server side, or IP address has changed, or session has expired, logout.
if (empty($_SESSION['uid']) ||
($GLOBALS['disablesessionprotection']==false && $_SESSION['ip']!=allIPs()) ||
time() >= $_SESSION['expires_on'])
{
logout();
$userIsLoggedIn = false;
$loginFailure = true;
}
if (!empty($_SESSION['longlastingsession'])) {
$_SESSION['expires_on']=time()+$_SESSION['longlastingsession']; // In case of "Stay signed in" checked.
}
else {
$_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Standard session expiration date.
}
if (!$loginFailure) {
$userIsLoggedIn = true;
}
return $userIsLoggedIn;
}
$userIsLoggedIn = setup_login_state();
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// Checks if an update is available for Shaarli.
// (at most once a day, and only for registered user.)
// Output: '' = no new version.
// other= the available version.
function checkUpdate()
{
if (!isLoggedIn()) return ''; // Do not check versions for visitors.
if (empty($GLOBALS['config']['ENABLE_UPDATECHECK'])) return ''; // Do not check if the user doesn't want to.
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// 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'])))
{
$version = shaarli_version;
list($headers, $data) = get_http_url('https://raw.githubusercontent.com/shaarli/Shaarli/master/shaarli_version.php', 2);
if (strpos($headers[0], '200 OK') !== false) {
$version = str_replace(' */ ?>', '', str_replace('<?php /* ', '', $data));
}
// If failed, never mind. We don't want to bother the user with that.
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file_put_contents($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 $newestversion;
return '';
}
// -----------------------------------------------------------------------------------------------
// Log to text file
function logm($message)
{
$t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
file_put_contents($GLOBALS['config']['DATADIR'].'/log.txt',$t,FILE_APPEND);
}
// In a string, converts URLs to clickable links.
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// Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722
function text2clickable($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);
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}
// This function inserts &nbsp; 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($text)
{
return str_replace(' ',' &nbsp;',$text);
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}
// ------------------------------------------------------------------------------------------
// 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()
{
$attempts = array('en_US'); // Default if browser does not send HTTP_ACCEPT_LANGUAGE
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) // e.g. "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. Preferred language is always presented first.)
if (preg_match('/([a-z]{2})-?([a-z]{2})?/i',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches)) {
$loc = $matches[1] . (!empty($matches[2]) ? '_' . strtoupper($matches[2]) : '');
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$attempts = array($loc.'.UTF-8', $loc, str_replace('_', '-', $loc).'.UTF-8', str_replace('_', '-', $loc),
$loc . '_' . strtoupper($loc).'.UTF-8', $loc . '_' . strtoupper($loc),
$loc . '_' . $loc.'.UTF-8', $loc . '_' . $loc, $loc . '-' . strtoupper($loc).'.UTF-8',
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$loc . '-' . strtoupper($loc), $loc . '-' . $loc.'.UTF-8', $loc . '-' . $loc);
}
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}
setlocale(LC_TIME, $attempts); // LC_TIME = Set local for date/time format only.
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}
// ------------------------------------------------------------------------------------------
// PubSubHubbub protocol support (if enabled) [UNTESTED]
// (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) include './publisher.php';
function pubsubhub()
{
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
$p = new Publisher($GLOBALS['config']['PUBSUBHUB_URL']);
$topic_url = array (
index_url($_SERVER).'?do=atom',
index_url($_SERVER).'?do=rss'
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);
$p->publish_update($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;
}
function fillSessionInfo() {
$_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.
$_SESSION['username']=$GLOBALS['login'];
$_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
}
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// Check that user/password is correct.
function check_auth($login,$password)
{
$hash = sha1($password.$login.$GLOBALS['salt']);
if ($login==$GLOBALS['login'] && $hash==$GLOBALS['hash'])
{ // Login/password is correct.
fillSessionInfo();
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logm('Login successful');
return True;
}
logm('Login failed for user '.$login);
return False;
}
// Returns true if the user is logged in.
function isLoggedIn()
{
global $userIsLoggedIn;
return $userIsLoggedIn;
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}
// Force logout.
function logout() {
if (isset($_SESSION)) {
unset($_SESSION['uid']);
unset($_SESSION['ip']);
unset($_SESSION['username']);
unset($_SESSION['privateonly']);
}
setcookie('shaarli_staySignedIn', FALSE, 0, WEB_PATH);
}
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// ------------------------------------------------------------------------------------------
// 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'], $_POST['password'])))
{ // Login/password is OK.
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ban_loginOk();
// If user wants to keep the session cookie even after the browser closes:
if (!empty($_POST['longlastingsession']))
{
setcookie('shaarli_staySignedIn', STAY_SIGNED_IN_TOKEN, time()+31536000, WEB_PATH);
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$_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['SERVER_NAME']); // Set session cookie expiration on client side
// Note: Never forget the trailing slash on the cookie path!
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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['SERVER_NAME']); // 0 means "When browser closes"
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session_regenerate_id(true);
}
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// Optional redirect after login:
if (isset($_GET['post'])) {
$uri = '?post='. urlencode($_GET['post']);
foreach (array('description', 'source', 'title') as $param) {
if (!empty($_GET[$param])) {
$uri .= '&'.$param.'='.urlencode($_GET[$param]);
}
}
header('Location: '. $uri);
exit;
}
if (isset($_GET['edit_link'])) {
header('Location: ?edit_link='. escape($_GET['edit_link']));
exit;
}
if (isset($_POST['returnurl'])) {
// Prevent loops over login screen.
if (strpos($_POST['returnurl'], 'do=login') === false) {
header('Location: '. escape($_POST['returnurl']));
exit;
}
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}
header('Location: ?'); exit;
}
else
{
ban_loginFailed();
$redir = '';
if (isset($_GET['post'])) {
$redir = '?post=' . urlencode($_GET['post']);
foreach (array('description', 'source', 'title') as $param) {
if (!empty($_GET[$param])) {
$redir .= '&' . $param . '=' . urlencode($_GET[$param]);
}
}
}
echo '<script>alert("Wrong login/password.");document.location=\'?do=login'.$redir.'\';</script>'; // Redirect to login screen.
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exit;
}
}
// ------------------------------------------------------------------------------------------
// Misc utility functions:
// Convert post_max_size/upload_max_filesize (e.g. '16M') parameters to bytes.
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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 ? (e.g. 2M instead of 2000000)
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return $maxsize;
}
/* Converts a linkdate time (YYYYMMDD_HHMMSS) of an article to a timestamp (Unix epoch)
(used to build the ADD_DATE attribute in Netscape-bookmarks file)
PS: I could have used strptime(), but it does not exist on Windows. I'm too kind. */
function linkdate2timestamp($linkdate)
{
if(strcmp($linkdate, '_000000') !== 0 || !$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);
}
return time();
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}
/* 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.
}
// 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.
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$_SESSION['tokens'][$rnd]=1; // Store it on the server side.
return $rnd;
}
// Tells if a token is OK. Using this function will destroy the token.
// true=token is OK.
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function tokenOk($token)
{
if (isset($_SESSION['tokens'][$token]))
{
unset($_SESSION['tokens'][$token]); // Token is used: destroy it.
return true; // Token is OK.
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}
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');
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*/
class pageBuilder
{
private $tpl; // RainTPL template
function __construct()
{
$this->tpl = false;
}
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/**
* Initialize all default tpl tags.
*/
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private function initialize()
{
$this->tpl = new RainTPL;
$this->tpl->assign('newversion', escape(checkUpdate()));
$this->tpl->assign('feedurl', escape(index_url($_SERVER)));
$searchcrits = ''; // Search criteria
if (!empty($_GET['searchtags'])) {
$searchcrits .= '&searchtags=' . urlencode($_GET['searchtags']);
}
elseif (!empty($_GET['searchterm'])) {
$searchcrits .= '&searchterm=' . urlencode($_GET['searchterm']);
}
$this->tpl->assign('searchcrits', $searchcrits);
$this->tpl->assign('source', index_url($_SERVER));
$this->tpl->assign('version', shaarli_version);
$this->tpl->assign('scripturl', index_url($_SERVER));
$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['titleLink'])) {
$this->tpl->assign('titleLink', $GLOBALS['titleLink']);
}
if (!empty($GLOBALS['pagetitle'])) {
$this->tpl->assign('pagetitle', $GLOBALS['pagetitle']);
}
$this->tpl->assign('shaarlititle', empty($GLOBALS['title']) ? 'Shaarli': $GLOBALS['title']);
if (!empty($GLOBALS['plugins']['errors'])) {
$this->tpl->assign('plugin_errors', $GLOBALS['plugins']['errors']);
}
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}
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// The following assign() method is basically the same as RainTPL (except that it's lazy)
public function assign($what,$where)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->assign($what,$where);
}
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// Render a specific page (using a template).
// e.g. pb.renderPage('picwall')
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public function renderPage($page)
{
if ($this->tpl===false) $this->initialize(); // Lazy initialization
$this->tpl->draw($page);
}
}
// ------------------------------------------------------------------------------------------
// Output the last N links in RSS 2.0 format.
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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. e.g. http://mysite.com/shaarli/?do=rss&permalinks
// Also enabled through a config option
$usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
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// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
startsWith($query,'do=rss') && !isLoggedIn()
);
$cached = $cache->cachedVersion();
if (! empty($cached)) {
echo $cached;
exit;
}
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// If cached was not found (or not usable), then read the database and build the response:
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
// Read links from database (and filter private links if user it not logged in).
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// Optionally filter the results:
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$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
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else if (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
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else $linksToDisplay = $LINKSDB;
$nblinksToDisplay = 50; // Number of links to display.
if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
{
$nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
}
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$pageaddr=escape(index_url($_SERVER));
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echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">';
echo '<channel><title>'.$GLOBALS['title'].'</title><link>'.$pageaddr.'</link>';
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echo '<description>Shared links</description><language>en-en</language><copyright>'.$pageaddr.'</copyright>'."\n\n";
if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
echo '<!-- PubSubHubbub Discovery -->';
echo '<link rel="hub" href="'.escape($GLOBALS['config']['PUBSUBHUB_URL']).'" xmlns="http://www.w3.org/2005/Atom" />';
echo '<link rel="self" href="'.$pageaddr.'?do=rss" xmlns="http://www.w3.org/2005/Atom" />';
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echo '<!-- End Of PubSubHubbub Discovery -->';
}
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<$nblinksToDisplay && $i<count($keys))
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{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$rfc822date = linkdate2rfc822($link['linkdate']);
$absurl = $link['url'];
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if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
if ($usepermalinks===true)
echo '<item><title>'.$link['title'].'</title><guid isPermaLink="true">'.$guid.'</guid><link>'.$guid.'</link>';
else
echo '<item><title>'.$link['title'].'</title><guid isPermaLink="false">'.$guid.'</guid><link>'.$absurl.'</link>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) echo '<pubDate>'.escape($rfc822date)."</pubDate>\n";
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if ($link['tags']!='') // Adding tags to each RSS entry (as mentioned in RSS specification)
{
foreach(explode(' ',$link['tags']) as $tag) { echo '<category domain="'.$pageaddr.'">'.$tag.'</category>'."\n"; }
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}
// 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($link['description']))).$descriptionlink.']]></description>'."\n</item>\n";
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$i++;
}
echo '</channel></rss><!-- Cached version of '.escape(page_url($_SERVER)).' -->';
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$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Output the last N links in ATOM format.
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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. e.g. http://mysite.com/shaarli/?do=atom&permalinks
$usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
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// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
startsWith($query,'do=atom') && !isLoggedIn()
);
$cached = $cache->cachedVersion();
if (!empty($cached)) {
echo $cached;
exit;
}
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// If cached was not found (or not usable), then read the database and build the response:
// Read links from database (and filter private links if used it not logged in).
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
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// Optionally filter the results:
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$linksToDisplay=array();
if (!empty($_GET['searchterm'])) $linksToDisplay = $LINKSDB->filterFulltext($_GET['searchterm']);
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else if (!empty($_GET['searchtags'])) $linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
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else $linksToDisplay = $LINKSDB;
$nblinksToDisplay = 50; // Number of links to display.
if (!empty($_GET['nb'])) // In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
{
$nblinksToDisplay = $_GET['nb']=='all' ? count($linksToDisplay) : max($_GET['nb']+0,1) ;
}
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$pageaddr=escape(index_url($_SERVER));
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$latestDate = '';
$entries='';
$i=0;
$keys=array(); foreach($linksToDisplay as $key=>$value) { $keys[]=$key; } // No, I can't use array_keys().
while ($i<$nblinksToDisplay && $i<count($keys))
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{
$link = $linksToDisplay[$keys[$i]];
$guid = $pageaddr.'?'.smallHash($link['linkdate']);
$iso8601date = linkdate2iso8601($link['linkdate']);
$latestDate = max($latestDate,$iso8601date);
$absurl = $link['url'];
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if (startsWith($absurl,'?')) $absurl=$pageaddr.$absurl; // make permalink URL absolute
$entries.='<entry><title>'.$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()) $entries.='<updated>'.escape($iso8601date).'</updated>';
// 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;
$entries.='<content type="html"><![CDATA['.nl2br(keepMultipleSpaces(text2clickable($link['description']))).$descriptionlink."]]></content>\n";
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if ($link['tags']!='') // Adding tags to each ATOM entry (as mentioned in ATOM specification)
{
foreach(explode(' ',$link['tags']) as $tag)
{ $entries.='<category scheme="'.$pageaddr.'" term="'.$tag.'" />'."\n"; }
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}
$entries.="</entry>\n";
$i++;
}
$feed='<?xml version="1.0" encoding="UTF-8"?><feed xmlns="http://www.w3.org/2005/Atom">';
$feed.='<title>'.$GLOBALS['title'].'</title>';
if (!$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn()) $feed.='<updated>'.escape($latestDate).'</updated>';
$feed.='<link rel="self" href="'.escape(server_url($_SERVER).$_SERVER["REQUEST_URI"]).'" />';
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if (!empty($GLOBALS['config']['PUBSUBHUB_URL']))
{
$feed.='<!-- PubSubHubbub Discovery -->';
$feed.='<link rel="hub" href="'.escape($GLOBALS['config']['PUBSUBHUB_URL']).'" />';
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$feed.='<!-- End Of PubSubHubbub Discovery -->';
}
$feed.='<author><name>'.$pageaddr.'</name><uri>'.$pageaddr.'</uri></author>';
$feed.='<id>'.$pageaddr.'</id>'."\n\n"; // Yes, I know I should use a real IRI (RFC3987), but the site URL will do.
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$feed.=$entries;
$feed.='</feed><!-- Cached version of '.escape(page_url($_SERVER)).' -->';
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echo $feed;
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$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() {
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// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
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:
// Read links from database (and filter private links if used it not logged in).
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
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/* Some Shaarlies may have very few links, so we need to look
back in time (rsort()) until we have enough days ($nb_of_days).
*/
$linkdates = array();
foreach ($LINKSDB as $linkdate => $value) {
$linkdates[] = $linkdate;
}
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rsort($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?
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}
}
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// Build the RSS feed.
header('Content-Type: application/rss+xml; charset=utf-8');
$pageaddr = escape(index_url($_SERVER));
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echo '<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">';
echo '<channel>';
echo '<title>Daily - '. $GLOBALS['title'] . '</title>';
echo '<link>'. $pageaddr .'</link>';
echo '<description>Daily shared links</description>';
echo '<language>en-en</language>';
echo '<copyright>'. $pageaddr .'</copyright>'. PHP_EOL;
// For each day.
foreach ($days as $day => $linkdates) {
$daydate = linkdate2timestamp($day.'_000000'); // Full text date
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$rfc822date = linkdate2rfc822($day.'_000000');
$absurl = escape(index_url($_SERVER).'?do=daily&day='.$day); // Absolute URL of the corresponding "Daily" page.
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// Build the HTML body of this RSS entry.
$html = '';
$href = '';
$links = array();
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// We pre-format some fields for proper output.
foreach ($linkdates as $linkdate) {
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$l = $LINKSDB[$linkdate];
$l['formatedDescription'] = nl2br(keepMultipleSpaces(text2clickable($l['description'])));
$l['thumbnail'] = thumbnail($l['url']);
$l['timestamp'] = linkdate2timestamp($l['linkdate']);
if (startsWith($l['url'], '?')) {
$l['url'] = index_url($_SERVER) . $l['url']; // make permalink URL absolute
}
$links[$linkdate] = $l;
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}
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// Then build the HTML for this day:
$tpl = new RainTPL;
$tpl->assign('title', $GLOBALS['title']);
$tpl->assign('daydate', $daydate);
$tpl->assign('absurl', $absurl);
$tpl->assign('links', $links);
$tpl->assign('rfc822date', escape($rfc822date));
$html = $tpl->draw('dailyrss', $return_string=true);
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echo $html . PHP_EOL;
}
echo '</channel></rss><!-- Cached version of '. escape(page_url($_SERVER)) .' -->';
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$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// "Daily" page.
function showDaily()
{
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
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$day=Date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
if (isset($_GET['day'])) $day=$_GET['day'];
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$days = $LINKSDB->days();
$i = array_search($day,$days);
if ($i===false) { $i=count($days)-1; $day=$days[$i]; }
$previousday='';
$nextday='';
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if ($i!==false)
{
if ($i>=1) $previousday=$days[$i-1];
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if ($i<count($days)-1) $nextday=$days[$i+1];
}
try {
$linksToDisplay = $LINKSDB->filterDay($day);
} catch (Exception $exc) {
error_log($exc);
$linksToDisplay = array();
}
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// We pre-format some fields for proper output.
foreach($linksToDisplay as $key=>$link)
{
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$taglist = explode(' ',$link['tags']);
uasort($taglist, 'strcasecmp');
$linksToDisplay[$key]['taglist']=$taglist;
$linksToDisplay[$key]['formatedDescription']=nl2br(keepMultipleSpaces(text2clickable($link['description'])));
$linksToDisplay[$key]['thumbnail'] = thumbnail($link['url']);
$linksToDisplay[$key]['timestamp'] = linkdate2timestamp($link['linkdate']);
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}
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/* 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
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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.
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$length=strlen($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;
$data = array(
'linksToDisplay' => $linksToDisplay,
'linkcount' => count($LINKSDB),
'cols' => $columns,
'day' => linkdate2timestamp($day.'_000000'),
'previousday' => $previousday,
'nextday' => $nextday,
);
$pluginManager = PluginManager::getInstance();
$pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('daily');
exit;
}
// Renders the linklist
function showLinkList($PAGE, $LINKSDB) {
buildLinkList($PAGE,$LINKSDB); // Compute list of links to display
$PAGE->renderPage('linklist');
}
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// ------------------------------------------------------------------------------------------
// Render HTML page (according to URL parameters and user rights)
function renderPage()
{
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
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$PAGE = new pageBuilder;
// Determine which page will be rendered.
$query = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
$targetPage = Router::findPage($query, $_GET, isLoggedIn());
// Call plugin hooks for header, footer and includes, specifying which page will be rendered.
// Then assign generated data to RainTPL.
$common_hooks = array(
'header',
'footer',
'includes',
);
$pluginManager = PluginManager::getInstance();
foreach($common_hooks as $name) {
$plugin_data = array();
$pluginManager->executeHooks('render_' . $name, $plugin_data,
array(
'target' => $targetPage,
'loggedin' => isLoggedIn()
)
);
$PAGE->assign('plugins_' . $name, $plugin_data);
}
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// -------- Display login form.
if ($targetPage == Router::$PAGE_LOGIN)
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{
if ($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.
$PAGE->assign('token',$token);
$PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
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$PAGE->renderPage('loginform');
exit;
}
// -------- User wants to logout.
if (isset($_SERVER["QUERY_STRING"]) && startswith($_SERVER["QUERY_STRING"],'do=logout'))
{
invalidateCaches($GLOBALS['config']['PAGECACHE']);
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logout();
header('Location: ?');
exit;
}
// -------- Picture wall
if ($targetPage == Router::$PAGE_PICWALL)
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{
// Optionally filter the results:
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$links=array();
if (!empty($_GET['searchterm'])) $links = $LINKSDB->filterFulltext($_GET['searchterm']);
elseif (!empty($_GET['searchtags'])) $links = $LINKSDB->filterTags(trim($_GET['searchtags']));
else $links = $LINKSDB;
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$body='';
$linksToDisplay=array();
// Get only links which have a thumbnail.
foreach($links as $link)
{
$permalink='?'.escape(smallhash($link['linkdate']));
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$thumb=lazyThumbnail($link['url'],$permalink);
if ($thumb!='') // Only output links which have a thumbnail.
{
$link['thumbnail']=$thumb; // Thumbnail HTML code.
$linksToDisplay[]=$link; // Add to array.
}
}
$data = array(
'linkcount' => count($LINKSDB),
'linksToDisplay' => $linksToDisplay,
);
$pluginManager->executeHooks('render_picwall', $data, array('loggedin' => isLoggedIn()));
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('picwall');
exit;
}
// -------- Tag cloud
if ($targetPage == Router::$PAGE_TAGCLOUD)
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{
$tags= $LINKSDB->allTags();
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// 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)
// Tag font size scaling: default 15 and 30 logarithm bases affect scaling, 22 and 6 are arbitrary font sizes for max and min sizes.
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{
$tagList[$key] = array('count'=>$value,'size'=>log($value, 15) / log($maxcount, 30) * (22-6) + 6);
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}
$data = array(
'linkcount' => count($LINKSDB),
'tags' => $tagList,
);
$pluginManager->executeHooks('render_tagcloud', $data, array('loggedin' => isLoggedIn()));
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('tagcloud');
exit;
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}
// -------- 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), $params);
// Prevent redirection loop
if (isset($params['addtag'])) {
unset($params['addtag']);
}
// Check if this tag is already in the search query and ignore it if it is.
// Each tag is always separated by a space
if (isset($params['searchtags'])) {
$current_tags = explode(' ', $params['searchtags']);
} else {
$current_tags = array();
}
$addtag = true;
foreach ($current_tags as $value) {
if ($value === $_GET['addtag']) {
$addtag = false;
break;
}
}
// Append the tag if necessary
if (empty($params['searchtags'])) {
$params['searchtags'] = trim($_GET['addtag']);
}
else if ($addtag) {
$params['searchtags'] = trim($params['searchtags']).' '.trim($_GET['addtag']);
}
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unset($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'])) {
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// 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), $params);
// Prevent redirection loop
if (isset($params['removetag'])) {
unset($params['removetag']);
}
if (isset($params['searchtags'])) {
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$tags = explode(' ',$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);
}
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unset($params['page']); // We also remove page (keeping the same page has no sense, since the results are different)
}
header('Location: ?'.http_build_query($params));
exit;
}
// -------- User wants to change the number of links per page (linksperpage=...)
if (isset($_GET['linksperpage'])) {
if (is_numeric($_GET['linksperpage'])) {
$_SESSION['LINKS_PER_PAGE']=abs(intval($_GET['linksperpage']));
}
header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('linksperpage')));
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exit;
}
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// -------- User wants to see only private links (toggle)
if (isset($_GET['privateonly'])) {
if (empty($_SESSION['privateonly'])) {
$_SESSION['privateonly'] = 1; // See only private links
} else {
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unset($_SESSION['privateonly']); // See all links
}
header('Location: '. generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('privateonly')));
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exit;
}
// -------- Handle other actions allowed for non-logged in users:
if (!isLoggedIn())
{
// User tries to post new link but is not logged in:
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// Show login screen, then redirect to ?post=...
if (isset($_GET['post']))
{
header('Location: ?do=login&post='.urlencode($_GET['post']).(!empty($_GET['title'])?'&title='.urlencode($_GET['title']):'').(!empty($_GET['description'])?'&description='.urlencode($_GET['description']):'').(!empty($_GET['source'])?'&source='.urlencode($_GET['source']):'')); // Redirect to login page, then back to post link.
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exit;
}
// Same case as above except that user tried to access ?do=addlink without being logged in
// Note: passing empty parameters makes Shaarli generate default URLs and descriptions.
if (isset($_GET['do']) && $_GET['do'] === 'addlink') {
header('Location: ?do=login&post=');
exit;
}
showLinkList($PAGE, $LINKSDB);
if (isset($_GET['edit_link'])) {
header('Location: ?do=login&edit_link='. escape($_GET['edit_link']));
exit;
}
exit; // Never remove this one! All operations below are reserved for logged in user.
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}
// -------- All other functions are reserved for the registered user:
// -------- Display the Tools menu if requested (import/export/bookmarklet...)
if ($targetPage == Router::$PAGE_TOOLS)
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{
$data = array(
'linkcount' => count($LINKSDB),
'pageabsaddr' => index_url($_SERVER),
);
$pluginManager->executeHooks('render_tools', $data);
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('tools');
exit;
}
// -------- User wants to change his/her password.
if ($targetPage == Router::$PAGE_CHANGEPASSWORD)
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{
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!
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// Make sure old password is correct.
$oldhash = sha1($_POST['oldpassword'].$GLOBALS['login'].$GLOBALS['salt']);
if ($oldhash!=$GLOBALS['hash']) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
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// 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']);
try {
writeConfig($GLOBALS, isLoggedIn());
}
catch(Exception $e) {
error_log(
'ERROR while writing config file after changing password.' . PHP_EOL .
$e->getMessage()
);
// TODO: do not handle exceptions/errors in JS.
echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
exit;
}
echo '<script>alert("Your password has been changed.");document.location=\'?do=tools\';</script>';
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exit;
}
else // show the change password form.
{
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->renderPage('changepassword');
exit;
}
}
// -------- User wants to change configuration
if ($targetPage == Router::$PAGE_CONFIGURE)
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{
if (!empty($_POST['title']) )
{
if (!tokenOk($_POST['token'])) die('Wrong token.'); // Go away!
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$tz = 'UTC';
if (!empty($_POST['continent']) && !empty($_POST['city']))
if (isTimeZoneValid($_POST['continent'],$_POST['city']))
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$tz = $_POST['continent'].'/'.$_POST['city'];
$GLOBALS['timezone'] = $tz;
$GLOBALS['title']=$_POST['title'];
$GLOBALS['titleLink']=$_POST['titleLink'];
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$GLOBALS['redirector']=$_POST['redirector'];
$GLOBALS['disablesessionprotection']=!empty($_POST['disablesessionprotection']);
$GLOBALS['privateLinkByDefault']=!empty($_POST['privateLinkByDefault']);
$GLOBALS['config']['ENABLE_RSS_PERMALINKS']= !empty($_POST['enableRssPermalinks']);
$GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
$GLOBALS['config']['HIDE_PUBLIC_LINKS'] = !empty($_POST['hidePublicLinks']);
try {
writeConfig($GLOBALS, isLoggedIn());
}
catch(Exception $e) {
error_log(
'ERROR while writing config file after configuration update.' . PHP_EOL .
$e->getMessage()
);
// TODO: do not handle exceptions/errors in JS.
echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do=tools\';</script>';
exit;
}
echo '<script>alert("Configuration was saved.");document.location=\'?do=tools\';</script>';
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exit;
}
else // Show the configuration form.
{
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->assign('title', empty($GLOBALS['title']) ? '' : $GLOBALS['title'] );
$PAGE->assign('redirector', empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'] );
list($timezone_form, $timezone_js) = generateTimeZoneForm($GLOBALS['timezone']);
$PAGE->assign('timezone_form', $timezone_form);
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$PAGE->assign('timezone_js',$timezone_js);
$PAGE->renderPage('configure');
exit;
}
}
// -------- User wants to rename a tag or delete it
if ($targetPage == Router::$PAGE_CHANGETAG)
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{
if (empty($_POST['fromtag']))
{
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->assign('tags', $LINKSDB->allTags());
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$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.
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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;
}
$LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // Save to disk.
echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
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exit;
}
// Rename a tag:
if (!empty($_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']); // Replace tags value.
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$value['tags']=trim(implode(' ',$tags));
$LINKSDB[$key]=$value;
}
$LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // Save to disk.
echo '<script>alert("Tag was renamed in '.count($linksToAlter).' links.");document.location=\'?searchtags='.urlencode($_POST['totag']).'\';</script>';
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exit;
}
}
// -------- User wants to add a link without using the bookmarklet: Show form.
if ($targetPage == Router::$PAGE_ADDLINK)
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{
$PAGE->assign('linkcount',count($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($_POST['token'])) die('Wrong token.'); // Go away!
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$tags = trim(preg_replace('/\s\s+/',' ', $_POST['lf_tags'])); // Remove multiple spaces.
$tags = implode(' ', array_unique(explode(' ', $tags))); // Remove duplicates.
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$linkdate=$_POST['lf_linkdate'];
$url = trim($_POST['lf_url']);
if (!startsWith($url,'http:') && !startsWith($url,'https:') && !startsWith($url,'ftp:') && !startsWith($url,'magnet:') && !startsWith($url,'?') && !startsWith($url,'javascript:'))
$url = 'http://'.$url;
$link = array('title'=>trim($_POST['lf_title']),'url'=>$url,'description'=>trim($_POST['lf_description']),'private'=>(isset($_POST['lf_private']) ? 1 : 0),
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'linkdate'=>$linkdate,'tags'=>str_replace(',',' ',$tags));
if ($link['title']=='') $link['title']=$link['url']; // If title is empty, use the URL as title.
$pluginManager->executeHooks('save_link', $link);
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$LINKSDB[$linkdate] = $link;
$LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // Save to disk.
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pubsubhub();
// If we are called from the bookmarklet, we must close the popup:
if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
echo '<script>self.close();</script>';
exit;
}
$returnurl = !empty($_POST['returnurl']) ? escape($_POST['returnurl']): '?';
$location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
$location .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited.
header('Location: '. $location); // After saving the link, redirect to the page the user was on.
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exit;
}
// -------- User clicked the "Cancel" button when editing a link.
if (isset($_POST['cancel_edit']))
{
// If we are called from the bookmarklet, we must close the popup:
if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
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$returnurl = ( isset($_POST['returnurl']) ? $_POST['returnurl'] : '?' );
$returnurl .= '#'.smallHash($_POST['lf_linkdate']); // Scroll to the link which has been edited.
$returnurl = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
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header('Location: '.$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.
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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
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// - we are protected from XSRF by the token.
$linkdate=$_POST['lf_linkdate'];
$pluginManager->executeHooks('delete_link', $LINKSDB[$linkdate]);
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unset($LINKSDB[$linkdate]);
$LINKSDB->savedb($GLOBALS['config']['PAGECACHE']); // save to disk
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// If we are called from the bookmarklet, we must close the popup:
if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) { echo '<script>self.close();</script>'; exit; }
// Pick where we're going to redirect
// =============================================================
// Basically, we can't redirect to where we were previously if it was a permalink
// or an edit_link, because it would 404.
// Cases:
// - / : nothing in $_GET, redirect to self
// - /?page : redirect to self
// - /?searchterm : redirect to self (there might be other links)
// - /?searchtags : redirect to self
// - /permalink : redirect to / (the link does not exist anymore)
// - /?edit_link : redirect to / (the link does not exist anymore)
// PHP treats the permalink as a $_GET variable, so we need to check if every condition for self
// redirect is not satisfied, and only then redirect to /
$location = "?";
// Self redirection
if (count($_GET) == 0
|| isset($_GET['page'])
|| isset($_GET['searchterm'])
|| isset($_GET['searchtags'])
) {
if (isset($_POST['returnurl'])) {
$location = $_POST['returnurl']; // Handle redirects given by the form
} else {
$location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('delete_link'));
}
}
header('Location: ' . $location); // After deleting the link, redirect to appropriate location
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exit;
}
// -------- User clicked the "EDIT" button on a link: Display link edit form.
if (isset($_GET['edit_link']))
{
$link = $LINKSDB[$_GET['edit_link']]; // Read database
if (!$link) { header('Location: ?'); exit; } // Link not found in database.
$data = array(
'linkcount' => count($LINKSDB),
'link' => $link,
'link_is_new' => false,
'token' => getToken(),
'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
'tags' => $LINKSDB->allTags(),
);
$pluginManager->executeHooks('render_editlink', $data);
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('editlink');
exit;
}
// -------- User want to post a new link: Display link edit form.
if (isset($_GET['post'])) {
$url = cleanup_url($_GET['post']);
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$link_is_new = false;
// Check if URL is not already in database (in this case, we will edit the existing link)
$link = $LINKSDB->getLinkFromUrl($url);
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if (!$link)
{
$link_is_new = true;
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$linkdate = strval(date('Ymd_His'));
// Get title if it was provided in URL (by the bookmarklet).
$title = (empty($_GET['title']) ? '' : $_GET['title'] );
// Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
$description = (empty($_GET['description']) ? '' : $_GET['description']);
$tags = (empty($_GET['tags']) ? '' : $_GET['tags'] );
$private = (!empty($_GET['private']) && $_GET['private'] === "1" ? 1 : 0);
// If this is an HTTP(S) link, we try go get the page to extract the title (otherwise we will to straight to the edit form.)
if (empty($title) && strpos(get_url_scheme($url), 'http') !== false) {
// Short timeout to keep the application responsive
list($headers, $data) = get_http_url($url, 4);
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// FIXME: Decode charset according to specified in either 1) HTTP response headers or 2) <head> in html
if (strpos($headers[0], '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) : $title;
}
}
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}
if ($url == '') {
$url = '?' . smallHash($linkdate);
$title = 'Note: ';
}
$link = array(
'linkdate' => $linkdate,
'title' => $title,
'url' => $url,
'description' => $description,
'tags' => $tags,
'private' => $private
);
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}
$data = array(
'linkcount' => count($LINKSDB),
'link' => $link,
'link_is_new' => $link_is_new,
'token' => getToken(), // XSRF protection.
'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
'tags' => $LINKSDB->allTags(),
);
$pluginManager->executeHooks('render_editlink', $data);
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('editlink');
exit;
}
// -------- Export as Netscape Bookmarks HTML file.
if ($targetPage == Router::$PAGE_EXPORT)
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{
if (empty($_GET['what']))
{
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->renderPage('export');
exit;
}
$exportWhat=$_GET['what'];
if (!array_intersect(array('all','public','private'),array($exportWhat))) die('What are you trying to export???');
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header('Content-Type: text/html; charset=utf-8');
header('Content-disposition: attachment; filename=bookmarks_'.$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' && $link['private']==0))
{
echo '<DT><A HREF="'.$link['url'].'" ADD_DATE="'.linkdate2timestamp($link['linkdate']).'" PRIVATE="'.$link['private'].'"';
if ($link['tags']!='') echo ' TAGS="'.str_replace(' ',',',$link['tags']).'"';
echo '>'.$link['title']."</A>\n";
if ($link['description']!='') echo '<DD>'.$link['description']."\n";
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}
}
exit;
}
// -------- User is uploading a file for import
if (isset($_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']) ? '?' : $_SERVER['HTTP_REFERER'] );
echo '<script>alert("The file you are trying to upload is probably bigger than what this webserver can accept ('.getMaxFileSize().' bytes). Please upload in smaller chunks.");document.location=\''.escape($returnurl).'\';</script>';
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exit;
}
if (!tokenOk($_POST['token'])) die('Wrong token.');
importFile();
exit;
}
// -------- Show upload/import dialog:
if ($targetPage == Router::$PAGE_IMPORT)
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{
$PAGE->assign('linkcount',count($LINKSDB));
$PAGE->assign('token',getToken());
$PAGE->assign('maxfilesize',getMaxFileSize());
$PAGE->renderPage('import');
exit;
}
// -------- Otherwise, simply display search form and links:
showLinkList($PAGE, $LINKSDB);
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exit;
}
// -----------------------------------------------------------------------------------------------
// Process the import file form.
function importFile()
{
if (!isLoggedIn()) { die('Not allowed.'); }
$LINKSDB = new LinkDB(
$GLOBALS['config']['DATASTORE'],
isLoggedIn(),
$GLOBALS['config']['HIDE_PUBLIC_LINKS']
);
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$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?
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$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.
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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) $raw_add_date/=1000; //If larger than year 2920, then was likely stored in milliseconds instead of seconds
}
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elseif ($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)) $raw_add_date=time(); // In case of shitty bookmark file with no ADD_DATE
// Make sure date/time is not already used by another link.
// (Some bookmark files have several different links with the same ADD_DATE)
// We increment date by 1 second until we find a date which is not used in DB.
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// (so that links that have the same date/time are more or less kept grouped by date, but do not conflict.)
while (!empty($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;
$import_count++;
}
else // Link already present in database.
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{
if ($overwrite)
{ // If overwrite is required, we import link data, except date/time.
$link['linkdate']=$dblink['linkdate'];
$LINKSDB[$link['linkdate']] = $link;
$import_count++;
}
}
}
}
}
$LINKSDB->savedb($GLOBALS['config']['PAGECACHE']);
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echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) was successfully processed: '.$import_count.' links imported.");document.location=\'?\';</script>';
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}
else
{
echo '<script>alert("File '.json_encode($filename).' ('.$filesize.' bytes) has an unknown file format. Nothing was imported.");document.location=\'?\';</script>';
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}
}
// -----------------------------------------------------------------------------------------------
// 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']));
$search_crits=escape(trim($_GET['searchterm']));
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$search_type='fulltext';
}
elseif (isset($_GET['searchtags'])) // Search by tag
{
$linksToDisplay = $LINKSDB->filterTags(trim($_GET['searchtags']));
$search_crits=explode(' ',escape(trim($_GET['searchtags'])));
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$search_type='tags';
}
elseif (isset($_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>Would you mind <a href="?">clicking here</a>?';
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exit;
}
$search_type='permalink';
}
else
$linksToDisplay = $LINKSDB; // Otherwise, display without filtering.
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// Option: Show only private links
if (!empty($_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???
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"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.
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// 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]];
$link['description']=nl2br(keepMultipleSpaces(text2clickable($link['description'])));
$title=$link['title'];
$classLi = $i%2!=0 ? '' : 'publicLinkHightLight';
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$link['class'] = ($link['private']==0 ? $classLi : 'private');
$link['timestamp']=linkdate2timestamp($link['linkdate']);
$taglist = explode(' ',$link['tags']);
uasort($taglist, 'strcasecmp');
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$link['taglist']=$taglist;
$link['shorturl'] = smallHash($link['linkdate']);
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if ($link["url"][0] === '?' && // Check for both signs of a note: starting with ? and 7 chars long. I doubt that you'll post any links that look like this.
strlen($link["url"]) === 7) {
$link["url"] = index_url($_SERVER) . $link["url"];
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}
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$linkDisp[$keys[$i]] = $link;
$i++;
}
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// 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();
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// Fill all template fields.
$data = array(
'linkcount' => count($LINKSDB),
'previous_page_url' => $previous_page_url,
'next_page_url' => $next_page_url,
'page_current' => $page,
'page_max' => $pagecount,
'result_count' => count($linksToDisplay),
'search_type' => $search_type,
'search_crits' => $search_crits,
'redirector' => empty($GLOBALS['redirector']) ? '' : $GLOBALS['redirector'], // Optional redirector URL.
'token' => $token,
'links' => $linkDisp,
'tags' => $LINKSDB->allTags(),
);
$pluginManager = PluginManager::getInstance();
$pluginManager->executeHooks('render_linklist', $data, array('loggedin' => isLoggedIn()));
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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return;
}
// Compute the thumbnail for a link.
//
// With a link to the original URL.
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// Understands various services (youtube.com...)
// Input: $url = URL for which the thumbnail must be found.
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// $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.
// (e.g. http://www.youtube.com/watch?v=spVypYk4kto ---> http://img.youtube.com/vi/spVypYk4kto/default.jpg )
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// ^^^^^^^^^^^ ^^^^^^^^^^^
$domain = parse_url($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'=>'https://img.youtube.com/vi/'.$params['v'].'/default.jpg',
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'href'=>$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'=>'https://img.youtube.com/vi'.$path.'/default.jpg',
'href'=>$href,'width'=>'120','height'=>'90','alt'=>'YouTube thumbnail');
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}
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'=>$href,'style'=>'max-width:120px; max-height:150px','alt'=>'pix.toile-libre.org thumbnail');
}
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if ($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'=>'https://i.imgur.com/'.basename($path).'s.jpg',
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'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (startsWith($path,'/gallery/')) return array('src'=>'https://i.imgur.com'.substr($path,8).'s.jpg',
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'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
if (substr_count($path,'/')==1) return array('src'=>'https://i.imgur.com/'.substr($path,1).'s.jpg',
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'href'=>$href,'width'=>'90','height'=>'90','alt'=>'imgur.com thumbnail');
}
if ($domain=='i.imgur.com')
{
$pi = pathinfo(parse_url($url,PHP_URL_PATH));
if (!empty($pi['filename'])) return array('src'=>'https://i.imgur.com/'.$pi['filename'].'s.jpg',
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'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 ($domain=='vimeo.com')
{ // Make sure this vimeo URL points to a video (/xxx... where xxx is numeric)
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$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)
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$path = parse_url($url,PHP_URL_PATH);
if (!preg_match('!/\d+.+?!',$path)) return array();
}
if ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{ // Make sure this TED URL points to a video (/talks/...)
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$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, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
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'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, $GLOBALS['salt']); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_SERVER).'?do=genthumbnail&hmac='.$sign.'&url='.urlencode($url),
'href'=>$href,'width'=>'120','style'=>'height:auto;','alt'=>'thumbnail');
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}
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.
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// $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.
$html='<a href="'.escape($t['href']).'"><img src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
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$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.
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// $href = if provided, this URL will be followed instead of $url
// Returns '' if no thumbnail available.
function lazyThumbnail($url,$href=false)
{
$t = computeThumbnail($url,$href);
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if (count($t)==0) return ''; // Empty array = no thumbnail for this URL.
$html='<a href="'.escape($t['href']).'">';
// Lazy image
$html.='<img class="b-lazy" src="#" data-src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
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$html.='>';
// No-JavaScript fallback.
$html.='<noscript><img src="'.escape($t['src']).'"';
if (!empty($t['width'])) $html.=' width="'.escape($t['width']).'"';
if (!empty($t['height'])) $html.=' height="'.escape($t['height']).'"';
if (!empty($t['style'])) $html.=' style="'.escape($t['style']).'"';
if (!empty($t['alt'])) $html.=' alt="'.escape($t['alt']).'"';
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$html.='></noscript></a>';
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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);
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// 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']) || $_SESSION['session_tested']!='Working'))
{ // Step 2: Check if data in session is correct.
echo '<pre>Sessions do not seem to work correctly on your server.<br>';
echo 'Make sure the variable session.save_path is set correctly in your php config, and that you have write access to it.<br>';
echo 'It currently points to '.session_save_path().'<br>';
echo 'Check that the hostname used to access Shaarli contains a dot. On some browsers, accessing your server via a hostname like \'localhost\' or any custom hostname without a dot causes cookie storage to fail. We recommend accessing your server via it\'s IP address or Fully Qualified Domain Name.<br>';
echo '<br><a href="?">Click to try again.</a></pre>';
die;
}
if (!isset($_SESSION['session_tested']))
{ // Step 1 : Try to store data in session and reload page.
$_SESSION['session_tested'] = 'Working'; // Try to set a variable in session.
header('Location: '.index_url($_SERVER).'?test_session'); // Redirect to check stored data.
}
if (isset($_GET['test_session']))
{ // Step 3: Sessions are OK. Remove test parameter from URL.
header('Location: '.index_url($_SERVER));
}
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if (!empty($_POST['setlogin']) && !empty($_POST['setpassword']))
{
$tz = 'UTC';
if (!empty($_POST['continent']) && !empty($_POST['city'])) {
if (isTimeZoneValid($_POST['continent'], $_POST['city'])) {
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$tz = $_POST['continent'].'/'.$_POST['city'];
}
}
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$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 '.escape(index_url($_SERVER)) : $_POST['title'] );
$GLOBALS['config']['ENABLE_UPDATECHECK'] = !empty($_POST['updateCheck']);
try {
writeConfig($GLOBALS, isLoggedIn());
}
catch(Exception $e) {
error_log(
'ERROR while writing config file after installation.' . PHP_EOL .
$e->getMessage()
);
// TODO: do not handle exceptions/errors in JS.
echo '<script>alert("'. $e->getMessage() .'");document.location=\'?\';</script>';
exit;
}
echo '<script>alert("Shaarli is now configured. Please enter your login/password and start shaaring your links!");document.location=\'?do=login\';</script>';
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exit;
}
// Display config form:
list($timezone_form, $timezone_js) = generateTimeZoneForm();
$timezone_html = '';
if ($timezone_form != '') {
$timezone_html = '<tr><td><b>Timezone:</b></td><td>'.$timezone_form.'</td></tr>';
}
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$PAGE = new pageBuilder;
$PAGE->assign('timezone_html',$timezone_html);
$PAGE->assign('timezone_js',$timezone_js);
$PAGE->renderPage('install');
exit;
}
if (!function_exists('json_encode')) {
function json_encode($data) {
switch ($type = gettype($data)) {
case 'NULL':
return 'null';
case 'boolean':
return ($data ? 'true' : 'false');
case 'integer':
case 'double':
case 'float':
return $data;
case 'string':
return '"' . addslashes($data) . '"';
case 'object':
$data = get_object_vars($data);
case 'array':
$output_index_count = 0;
$output_indexed = array();
$output_associative = array();
foreach ($data as $key => $value) {
$output_indexed[] = json_encode($value);
$output_associative[] = json_encode($key) . ':' . json_encode($value);
if ($output_index_count !== NULL && $output_index_count++ !== $key) {
$output_index_count = NULL;
}
}
if ($output_index_count !== NULL) {
return '[' . implode(',', $output_indexed) . ']';
} else {
return '{' . implode(',', $output_associative) . '}';
}
default:
return ''; // Not supported
}
}
}
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/* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
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I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
This function is called by passing the URL:
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http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
[URL] is the URL of the link (e.g. a flickr page)
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[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!');
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// 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)
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$url = str_replace('http://flickr.com/','http://www.flickr.com/',$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. e.g. http://farm1.staticflickr.com/5/5921913_ac83ed27bd_o.jpg
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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)
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{
// Get the flickr html page.
list($headers, $data) = get_http_url($url, 20);
if (strpos($headers[0], '200 OK') !== false)
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{
// flickr now nicely provides the URL of the thumbnail in each flickr page.
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preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!',$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 ($imageurl!='')
{ // Let's download the image.
// Image is 240x120, so 10 seconds to download should be enough.
list($headers, $data) = get_http_url($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
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file_put_contents($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
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$vid = substr(parse_url($url,PHP_URL_PATH),1);
list($headers, $data) = get_http_url('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
if (strpos($headers[0], '200 OK') !== false) {
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$t = unserialize($data);
$imageurl = $t[0]['thumbnail_medium'];
// Then we download the image and serve it to our client.
list($headers, $data) = get_http_url($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
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file_put_contents($GLOBALS['config']['CACHEDIR'].'/'.$thumbname,$data); // Save image to cache.
header('Content-Type: image/jpeg');
echo $data;
return;
}
}
}
elseif ($domain=='ted.com' || endsWith($domain,'.ted.com'))
{
// The thumbnail for TED talks is located in the <link rel="image_src" [...]> tag on that page
// http://www.ted.com/talks/mikko_hypponen_fighting_viruses_defending_the_net.html
// <link rel="image_src" href="http://images.ted.com/images/ted/28bced335898ba54d4441809c5b1112ffaf36781_389x292.jpg" />
list($headers, $data) = get_http_url($url, 5);
if (strpos($headers[0], '200 OK') !== false) {
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// Extract the link to the thumbnail
preg_match('!link rel="image_src" href="(http://images.ted.com/images/ted/.+_\d+x\d+\.jpg)"!',$data,$matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $data) = get_http_url($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
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$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;
}
}
}
}
}
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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($headers, $data) = get_http_url($url, 5);
if (strpos($headers[0], '200 OK') !== false) {
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// Extract the link to the thumbnail
preg_match('!<img src="(http://imgs.xkcd.com/comics/.*)" title="[^s]!',$data,$matches);
if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $data) = get_http_url($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
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$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;
}
}
}
}
}
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else
{
// For all other domains, we try to download the image and make a thumbnail.
// We allow 30 seconds max to download (and downloads are limited to 4 Mb)
list($headers, $data) = get_http_url($url, 30);
if (strpos($headers[0], '200 OK') !== false) {
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$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);
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rename($tempname,$filepath); // Overwrite original picture with thumbnail.
return true;
}
try {
mergeDeprecatedConfig($GLOBALS, isLoggedIn());
} catch(Exception $e) {
error_log(
'ERROR while merging deprecated options.php file.' . PHP_EOL .
$e->getMessage()
);
}
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if (isset($_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($_SERVER["QUERY_STRING"],'do=daily')) { showDaily(); exit; }
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if (!isset($_SESSION['LINKS_PER_PAGE'])) $_SESSION['LINKS_PER_PAGE']=$GLOBALS['config']['LINKS_PER_PAGE'];
renderPage();
?>