MyShaarli/index.php

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2013-02-26 10:09:41 +01:00
<?php
/**
* Shaarli v0.8.0 - Shaare your links...
*
* The personal, minimalist, super-fast, database free, bookmarking service.
*
* 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');
}
/*
* PHP configuration
*/
define('shaarli_version', '0.8.0');
// 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);
// 3rd-party libraries
if (! file_exists(__DIR__ . '/vendor/autoload.php')) {
header('Content-Type: text/plain; charset=utf-8');
echo "Error: missing Composer configuration\n\n"
."If you installed Shaarli through Git or using the development branch,\n"
."please refer to the installation documentation to install PHP"
." dependencies using Composer:\n"
."- https://github.com/shaarli/Shaarli/wiki/Server-requirements\n"
."- https://github.com/shaarli/Shaarli/wiki/Download-and-Installation";
exit;
}
require_once 'inc/rain.tpl.class.php';
require_once __DIR__ . '/vendor/autoload.php';
// Shaarli library
require_once 'application/ApplicationUtils.php';
require_once 'application/Cache.php';
require_once 'application/CachedPage.php';
require_once 'application/config/ConfigManager.php';
require_once 'application/config/ConfigPlugin.php';
require_once 'application/FeedBuilder.php';
require_once 'application/FileUtils.php';
require_once 'application/HttpUtils.php';
require_once 'application/Languages.php';
require_once 'application/LinkDB.php';
require_once 'application/LinkFilter.php';
require_once 'application/LinkUtils.php';
require_once 'application/NetscapeBookmarkUtils.php';
require_once 'application/PageBuilder.php';
require_once 'application/TimeZone.php';
require_once 'application/Url.php';
require_once 'application/Utils.php';
require_once 'application/PluginManager.php';
require_once 'application/Router.php';
require_once 'application/Updater.php';
// Ensure the PHP version is supported
try {
ApplicationUtils::checkPHPVersion('5.3', PHP_VERSION);
} catch(Exception $exc) {
header('Content-Type: text/plain; charset=utf-8');
echo $exc->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();
}
$conf = new ConfigManager();
$conf->setEmpty('general.timezone', date_default_timezone_get());
$conf->setEmpty('general.title', 'Shared links on '. escape(index_url($_SERVER)));
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$conf->setEmpty('resource.theme', 'default');
RainTPL::$tpl_dir = 'tpl/'.$conf->get('resource.theme').'/'; // template directory
RainTPL::$cache_dir = $conf->get('resource.raintpl_tmp'); // cache directory
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$pluginManager = new PluginManager($conf);
$pluginManager->load($conf->get('general.enabled_plugins'));
date_default_timezone_set($conf->get('general.timezone', 'UTC'));
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ob_start(); // Output buffering for the page cache.
// In case stupid admin has left magic_quotes enabled in php.ini:
if (get_magic_quotes_gpc())
{
function stripslashes_deep($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', $_COOKIE);
}
// Prevent caching on client side or proxy: (yes, it's ugly)
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
if (! is_file($conf->getConfigFileExt())) {
// Ensure Shaarli has proper access to its resources
$errors = ApplicationUtils::checkResourcePermissions($conf);
if ($errors != array()) {
$message = '<p>Insufficient permissions:</p><ul>';
foreach ($errors as $error) {
$message .= '<li>'.$error.'</li>';
}
$message .= '</ul>';
header('Content-Type: text/html; charset=utf-8');
echo $message;
exit;
}
// Display the installation form if no existing config is found
install($conf);
}
// a token depending of deployment salt, user password, and the current ip
define('STAY_SIGNED_IN_TOKEN', sha1($conf->get('credentials.hash') . $_SERVER['REMOTE_ADDR'] . $conf->get('credentials.salt')));
// Sniff browser language and set date format accordingly.
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
autoLocale($_SERVER['HTTP_ACCEPT_LANGUAGE']);
}
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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)
*
* @param ConfigManager $conf The configuration manager.
*
* @return bool: true if the user is logged in, false otherwise.
*/
function setup_login_state($conf)
{
if ($conf->get('security.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 (! $conf->exists('credentials.login')) {
$userIsLoggedIn = false; // Shaarli is not configured yet.
$loginFailure = true;
}
if (isset($_COOKIE['shaarli_staySignedIn']) &&
$_COOKIE['shaarli_staySignedIn']===STAY_SIGNED_IN_TOKEN &&
!$loginFailure)
{
fillSessionInfo($conf);
$userIsLoggedIn = true;
}
// If session does not exist on server side, or IP address has changed, or session has expired, logout.
if (empty($_SESSION['uid'])
|| ($conf->get('security.session_protection_disabled') == 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;
}
$userIsLoggedIn = setup_login_state($conf);
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/**
* PubSubHubbub protocol support (if enabled) [UNTESTED]
* (Source: http://aldarone.fr/les-flux-rss-shaarli-et-pubsubhubbub/ )
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function pubsubhub($conf)
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{
$pshUrl = $conf->get('config.PUBSUBHUB_URL');
if (!empty($pshUrl))
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{
include_once './publisher.php';
$p = new Publisher($pshUrl);
$topic_url = array (
index_url($_SERVER).'?do=atom',
index_url($_SERVER).'?do=rss'
);
$p->publish_update($topic_url);
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}
}
// ------------------------------------------------------------------------------------------
// Session management
// Returns the IP address of the client (Used to prevent session cookie hijacking.)
function allIPs()
{
$ip = $_SERVER['REMOTE_ADDR'];
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// Then we use more HTTP headers to prevent session hijacking from users behind the same proxy.
if (isset($_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;
}
/**
* Load user session.
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function fillSessionInfo($conf)
{
$_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']= $conf->get('credentials.login');
$_SESSION['expires_on']=time()+INACTIVITY_TIMEOUT; // Set session expiration.
}
/**
* Check that user/password is correct.
*
* @param string $login Username
* @param string $password User password
* @param ConfigManager $conf Configuration Manager instance.
*
* @return bool: authentication successful or not.
*/
function check_auth($login, $password, $conf)
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{
$hash = sha1($password . $login . $conf->get('credentials.salt'));
if ($login == $conf->get('credentials.login') && $hash == $conf->get('credentials.hash'))
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{ // Login/password is correct.
fillSessionInfo($conf);
logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login successful');
return true;
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}
logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Login failed for user '.$login);
return false;
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}
// 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($conf->get('resource.ban_file', 'data/ipbans.php'))) {
// FIXME! globals
file_put_contents(
$conf->get('resource.ban_file', 'data/ipbans.php'),
"<?php\n\$GLOBALS['IPBANS']=".var_export(array('FAILURES'=>array(),'BANS'=>array()),true).";\n?>"
);
}
include $conf->get('resource.ban_file', 'data/ipbans.php');
/**
* Signal a failed login. Will ban the IP if too many failures:
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function ban_loginFailed($conf)
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{
$ip = $_SERVER['REMOTE_ADDR'];
$trusted = $conf->get('security.trusted_proxies', array());
if (in_array($ip, $trusted)) {
$ip = getIpAddressFromProxy($_SERVER, $trusted);
if (!$ip) {
return;
}
}
$gb = $GLOBALS['IPBANS'];
if (! isset($gb['FAILURES'][$ip])) {
$gb['FAILURES'][$ip]=0;
}
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$gb['FAILURES'][$ip]++;
if ($gb['FAILURES'][$ip] > ($conf->get('security.ban_after') - 1))
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{
$gb['BANS'][$ip] = time() + $conf->get('security.ban_after', 1800);
logm($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'IP address banned from login');
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}
$GLOBALS['IPBANS'] = $gb;
file_put_contents(
$conf->get('resource.ban_file', 'data/ipbans.php'),
"<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
);
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}
/**
* Signals a successful login. Resets failed login counter.
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function ban_loginOk($conf)
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{
$ip = $_SERVER['REMOTE_ADDR'];
$gb = $GLOBALS['IPBANS'];
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unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
$GLOBALS['IPBANS'] = $gb;
file_put_contents(
$conf->get('resource.ban_file', 'data/ipbans.php'),
"<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
);
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}
/**
* Checks if the user CAN login. If 'true', the user can try to login.
*
* @param ConfigManager $conf Configuration Manager instance.
*
* @return bool: true if the user is allowed to login.
*/
function ban_canLogin($conf)
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{
$ip=$_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($conf->get('resource.log'), $_SERVER['REMOTE_ADDR'], 'Ban lifted.');
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unset($gb['FAILURES'][$ip]); unset($gb['BANS'][$ip]);
file_put_contents(
$conf->get('resource.ban_file', 'data/ipbans.php'),
"<?php\n\$GLOBALS['IPBANS']=".var_export($gb,true).";\n?>"
);
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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($_POST['login']))
{
if (!ban_canLogin($conf)) 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'], $conf))
) { // Login/password is OK.
ban_loginOk($conf);
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// 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($_POST['returnurl'], 'do=login') === false) {
header('Location: '. generateLocation($_POST['returnurl'], $_SERVER['HTTP_HOST']));
exit;
}
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}
header('Location: ?'); exit;
}
else
{
ban_loginFailed($conf);
$redir = '&username='. $_POST['login'];
if (isset($_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 $maxsize;
}
// ------------------------------------------------------------------------------------------
// Token management for XSRF protection
// Token should be used in any form which acts on data (create,update,delete,import...).
if (!isset($_SESSION['tokens'])) $_SESSION['tokens']=array(); // Token are attached to the session.
/**
* Returns a token.
*
* @param ConfigManager $conf Configuration Manager instance.
*
* @return string token.
*/
function getToken($conf)
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{
$rnd = sha1(uniqid('', true) .'_'. mt_rand() . $conf->get('credentials.salt')); // We generate a random string.
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$_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.
}
/**
* 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.
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function showDailyRSS($conf) {
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// Cache system
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$query = $_SERVER['QUERY_STRING'];
$cache = new CachedPage(
$conf->get('config.PAGE_CACHE'),
page_url($_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(
$conf->get('resource.datastore'),
isLoggedIn(),
$conf->get('privacy.hide_public_links'),
$conf->get('redirector.url'),
$conf->get('redirector.encode_url')
);
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/* Some Shaarlies may have very few links, so we need to look
back in time (rsort()) until we have enough days ($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 - '. $conf->get('general.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 = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $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.
$links = array();
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// We pre-format some fields for proper output.
foreach ($linkdates as $linkdate) {
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$l = $LINKSDB[$linkdate];
$l['formatedDescription'] = format_description($l['description'], $conf->get('redirector.url'));
$l['thumbnail'] = thumbnail($conf, $l['url']);
$l_date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $l['linkdate']);
$l['timestamp'] = $l_date->getTimestamp();
if (startsWith($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', $conf->get('general.title'));
$tpl->assign('daydate', $dayDate->getTimestamp());
$tpl->assign('absurl', $absurl);
$tpl->assign('links', $links);
$tpl->assign('rssdate', escape($dayDate->format(DateTime::RSS)));
$tpl->assign('hide_timestamps', $conf->get('privacy.hide_timestamps', false));
$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;
}
/**
* Show the 'Daily' page.
*
* @param PageBuilder $pageBuilder Template engine wrapper.
* @param LinkDB $LINKSDB LinkDB instance.
* @param ConfigManager $conf Configuration Manager instance.
* @param PluginManager $pluginManager Plugin Manager instane.
*/
function showDaily($pageBuilder, $LINKSDB, $conf, $pluginManager)
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{
$day=date('Ymd',strtotime('-1 day')); // Yesterday, in format YYYYMMDD.
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if (isset($_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'] = format_description($link['description'], $conf->get('redirector.url'));
$linksToDisplay[$key]['thumbnail'] = thumbnail($conf, $link['url']);
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
$linksToDisplay[$key]['timestamp'] = $date->getTimestamp();
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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;
}
$dayDate = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $day.'_000000');
$data = array(
'linksToDisplay' => $linksToDisplay,
'cols' => $columns,
'day' => $dayDate->getTimestamp(),
'previousday' => $previousday,
'nextday' => $nextday,
);
$pluginManager->executeHooks('render_daily', $data, array('loggedin' => isLoggedIn()));
foreach ($data as $key => $value) {
$pageBuilder->assign($key, $value);
}
$pageBuilder->renderPage('daily');
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exit;
}
/**
* Renders the linklist
*
* @param pageBuilder $PAGE pageBuilder instance.
* @param LinkDB $LINKSDB LinkDB instance.
* @param ConfigManager $conf Configuration Manager instance.
* @param PluginManager $pluginManager Plugin Manager instance.
*/
function showLinkList($PAGE, $LINKSDB, $conf, $pluginManager) {
buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager); // Compute list of links to display
$PAGE->renderPage('linklist');
}
/**
* Render HTML page (according to URL parameters and user rights)
*
* @param ConfigManager $conf Configuration Manager instance.
* @param PluginManager $pluginManager Plugin Manager instance,
*/
function renderPage($conf, $pluginManager)
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{
$LINKSDB = new LinkDB(
$conf->get('resource.datastore'),
isLoggedIn(),
$conf->get('privacy.hide_public_links'),
$conf->get('redirector.url'),
$conf->get('redirector.encode_url')
);
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$updater = new Updater(
read_updates_file($conf->get('resource.updates')),
$LINKSDB,
$conf,
isLoggedIn()
);
try {
$newUpdates = $updater->update();
if (! empty($newUpdates)) {
write_updates_file(
$conf->get('resource.updates'),
$updater->getDoneUpdates()
);
}
}
catch(Exception $e) {
die($e->getMessage());
}
$PAGE = new PageBuilder($conf);
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$PAGE->assign('linkcount', count($LINKSDB));
$PAGE->assign('privateLinkcount', count_private($LINKSDB));
$PAGE->assign('plugin_errors', $pluginManager->getErrors());
// 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.
$common_hooks = array(
'includes',
'header',
'footer',
);
foreach($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::$PAGE_LOGIN)
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{
if ($conf->get('security.open_shaarli')) { header('Location: ?'); exit; } // No need to login for open Shaarli
if (isset($_GET['username'])) {
$PAGE->assign('username', escape($_GET['username']));
}
$PAGE->assign('returnurl',(isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']):''));
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$PAGE->renderPage('loginform');
exit;
}
// -------- User wants to logout.
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if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=logout'))
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{
invalidateCaches($conf->get('resource.page_cache'));
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logout();
header('Location: ?');
exit;
}
// -------- Picture wall
if ($targetPage == Router::$PAGE_PICWALL)
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{
// Optionally filter the results:
$links = $LINKSDB->filterSearch($_GET);
$linksToDisplay = array();
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// Get only links which have a thumbnail.
foreach($links as $link)
{
$permalink='?'.escape(smallHash($link['linkdate']));
$thumb=lazyThumbnail($conf, $link['url'],$permalink);
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if ($thumb!='') // Only output links which have a thumbnail.
{
$link['thumbnail']=$thumb; // Thumbnail HTML code.
$linksToDisplay[]=$link; // Add to array.
}
}
$data = array(
'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 $value) {
$maxcount = max($maxcount, $value);
}
// Sort tags alphabetically: case insensitive, support locale if available.
uksort($tags, function($a, $b) {
// Collator is part of PHP intl.
if (class_exists('Collator')) {
$c = new Collator(setlocale(LC_COLLATE, 0));
if (!intl_is_failure(intl_get_error_code())) {
return $c->compare($a, $b);
}
}
return strcasecmp($a, $b);
});
$tagList = array();
foreach($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.
$size = log($value, 15) / log($maxcount, 30) * 2.2 + 0.8;
$tagList[$key] = array(
'count' => $value,
'size' => number_format($size, 2, '.', ''),
);
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}
$data = array(
'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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}
// Daily page.
if ($targetPage == Router::$PAGE_DAILY) {
showDaily($PAGE, $LINKSDB, $conf, $pluginManager);
}
// ATOM and RSS feed.
if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
$feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
// Cache system
$query = $_SERVER['QUERY_STRING'];
$cache = new CachedPage(
$conf->get('resource.page_cache'),
page_url($_SERVER),
startsWith($query,'do='. $targetPage) && !isLoggedIn()
);
$cached = $cache->cachedVersion();
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if (!empty($cached)) {
echo $cached;
exit;
}
// Generate data.
$feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
$feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
$feedGenerator->setHideDates($conf->get('privacy.hide_timestamps') && !isLoggedIn());
$feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$conf->get('feed.rss_permalinks'));
$pshUrl = $conf->get('config.PUBSUBHUB_URL');
if (!empty($pshUrl)) {
$feedGenerator->setPubsubhubUrl($pshUrl);
}
$data = $feedGenerator->buildData();
// Process plugin hook.
$pluginManager->executeHooks('render_feed', $data, array(
'loggedin' => isLoggedIn(),
'target' => $targetPage,
));
// Render the template.
$PAGE->assignAll($data);
$PAGE->renderPage('feed.'. $feedType);
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// Display openseach plugin (XML)
if ($targetPage == Router::$PAGE_OPENSEARCH) {
header('Content-Type: application/xml; charset=utf-8');
$PAGE->assign('serverurl', index_url($_SERVER));
$PAGE->renderPage('opensearch');
exit;
}
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// -------- User clicks on a tag in a link: The tag is added to the list of searched tags (searchtags=...)
if (isset($_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'])) {
$tags = explode(' ', $params['searchtags']);
// Remove value from array $tags.
$tags = array_diff($tags, array($_GET['removetag']));
$params['searchtags'] = implode(' ',$tags);
if (empty($params['searchtags'])) {
unset($params['searchtags']);
}
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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($_GET['source']):'')); // Redirect to login page, then back to post link.
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exit;
}
showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
if (isset($_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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{
$data = array(
'pageabsaddr' => index_url($_SERVER),
'sslenabled' => !empty($_SERVER['HTTPS'])
);
$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 ($conf->get('security.open_shaarli')) {
die('You are not supposed to change a password on an Open Shaarli.');
}
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if (!empty($_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'].$conf->get('credentials.login').$conf->get('credentials.salt'));
if ($oldhash!= $conf->get('credentials.hash')) { echo '<script>alert("The old password is not correct.");document.location=\'?do=changepasswd\';</script>'; exit; }
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// Save new password
// Salt renders rainbow-tables attacks useless.
$conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
$conf->set('credentials.hash', sha1($_POST['setpassword'] . $conf->get('credentials.login') . $conf->get('credentials.salt')));
try {
$conf->write(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.
{
$PAGE->renderPage('changepassword');
exit;
}
}
// -------- User wants to change configuration
if ($targetPage == Router::$PAGE_CONFIGURE)
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{
if (!empty($_POST['title']) )
{
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if (!tokenOk($_POST['token'])) {
die('Wrong token.'); // Go away!
}
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$tz = 'UTC';
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if (!empty($_POST['continent']) && !empty($_POST['city'])
&& isTimeZoneValid($_POST['continent'], $_POST['city'])
) {
$tz = $_POST['continent'] . '/' . $_POST['city'];
}
$conf->set('general.timezone', $tz);
$conf->set('general.title', escape($_POST['title']));
$conf->set('general.header_link', escape($_POST['titleLink']));
$conf->set('resource.theme', escape($_POST['theme']));
$conf->set('redirector.url', escape($_POST['redirector']));
$conf->set('security.session_protection_disabled', !empty($_POST['disablesessionprotection']));
$conf->set('privacy.default_private_links', !empty($_POST['privateLinkByDefault']));
$conf->set('feed.rss_permalinks', !empty($_POST['enableRssPermalinks']));
$conf->set('updates.check_updates', !empty($_POST['updateCheck']));
$conf->set('privacy.hide_public_links', !empty($_POST['hidePublicLinks']));
try {
$conf->write(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=configure\';</script>';
exit;
}
echo '<script>alert("Configuration was saved.");document.location=\'?do=configure\';</script>';
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exit;
}
else // Show the configuration form.
{
$PAGE->assign('title', $conf->get('general.title'));
$PAGE->assign('theme', $conf->get('resource.theme'));
$PAGE->assign('theme_avaible', getAllTheme());
$PAGE->assign('redirector', $conf->get('redirector.url'));
list($timezone_form, $timezone_js) = generateTimeZoneForm($conf->get('general.timezone'));
$PAGE->assign('timezone_form', $timezone_form);
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$PAGE->assign('timezone_js',$timezone_js);
$PAGE->assign('private_links_default', $conf->get('privacy.default_private_links', false));
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$PAGE->assign('session_protection_disabled', $conf->get('security.session_protection_disabled', false));
$PAGE->assign('enable_rss_permalinks', $conf->get('feed.rss_permalinks', false));
$PAGE->assign('enable_update_check', $conf->get('updates.check_updates', true));
$PAGE->assign('hide_public_links', $conf->get('privacy.hide_public_links', false));
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$PAGE->renderPage('configure');
exit;
}
}
// -------- User wants to rename a tag or delete it
if ($targetPage == Router::$PAGE_CHANGETAG)
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{
if (empty($_POST['fromtag']) || (empty($_POST['totag']) && isset($_POST['renametag']))) {
$PAGE->assign('tags', $LINKSDB->allTags());
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$PAGE->renderPage('changetag');
exit;
}
if (!tokenOk($_POST['token'])) {
die('Wrong token.');
}
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// Delete a tag:
if (isset($_POST['deletetag']) && !empty($_POST['fromtag'])) {
$needle = trim($_POST['fromtag']);
// True for case-sensitive tag search.
$linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
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foreach($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;
}
$LINKSDB->save($conf->get('resource.page_cache'));
echo '<script>alert("Tag was removed from '.count($linksToAlter).' links.");document.location=\'?\';</script>';
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exit;
}
// Rename a tag:
if (isset($_POST['renametag']) && !empty($_POST['fromtag']) && !empty($_POST['totag'])) {
$needle = trim($_POST['fromtag']);
// True for case-sensitive tag search.
$linksToAlter = $LINKSDB->filterSearch(array('searchtags' => $needle), true);
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foreach($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;
}
$LINKSDB->save($conf->get('resource.page_cache')); // 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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{
$PAGE->renderPage('addlink');
exit;
}
// -------- User clicked the "Save" button when editing a link: Save link to database.
if (isset($_POST['save_edit']))
{
$linkdate = $_POST['lf_linkdate'];
$updated = isset($LINKSDB[$linkdate]) ? strval(date('Ymd_His')) : false;
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// Go away!
if (! tokenOk($_POST['token'])) {
die('Wrong token.');
}
// Remove multiple spaces.
$tags = trim(preg_replace('/\s\s+/', ' ', $_POST['lf_tags']));
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// Remove first '-' char in tags.
$tags = preg_replace('/(^| )\-/', '$1', $tags);
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// Remove duplicates.
$tags = implode(' ', array_unique(explode(' ', $tags)));
$url = trim($_POST['lf_url']);
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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' => $_POST['lf_description'],
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'private' => (isset($_POST['lf_private']) ? 1 : 0),
'linkdate' => $linkdate,
'updated' => $updated,
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'tags' => str_replace(',', ' ', $tags)
);
// If title is empty, use the URL as title.
if ($link['title'] == '') {
$link['title'] = $link['url'];
}
$pluginManager->executeHooks('save_link', $link);
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$LINKSDB[$linkdate] = $link;
$LINKSDB->save($conf->get('resource.page_cache'));
pubsubhub($conf);
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// If we are called from the bookmarklet, we must close the popup:
if (isset($_GET['source']) && ($_GET['source']=='bookmarklet' || $_GET['source']=='firefoxsocialapi')) {
echo '<script>self.close();</script>';
exit;
}
$returnurl = !empty($_POST['returnurl']) ? $_POST['returnurl'] : '?';
$location = generateLocation($returnurl, $_SERVER['HTTP_HOST'], array('addlink', 'post', 'edit_link'));
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// Scroll to the link which has been edited.
$location .= '#' . smallHash($_POST['lf_linkdate']);
// After saving the link, redirect to the page the user was on.
header('Location: '. $location);
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exit;
}
// -------- User clicked the "Cancel" button when editing a link.
if (isset($_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]);
$LINKSDB->save('resource.page_cache'); // save to disk
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// If we are called from the bookmarklet, we must close the popup:
if (isset($_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(
'link' => $link,
'link_is_new' => false,
'http_referer' => (isset($_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']) ? '' : escape($_GET['title']);
// Get description if it was provided in URL (by the bookmarklet). [Bronco added that]
$description = empty($_GET['description']) ? '' : escape($_GET['description']);
$tags = empty($_GET['tags']) ? '' : escape($_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, $content) = get_http_response($url, 4);
if (strpos($headers[0], '200 OK') !== false) {
// Retrieve charset.
$charset = get_charset($headers, $content);
// Extract title.
$title = html_extract_title($content);
// Re-encode title in utf-8 if necessary.
if (! empty($title) && strtolower($charset) != 'utf-8') {
$title = mb_convert_encoding($title, 'utf-8', $charset);
}
}
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}
if ($url == '') {
$url = '?' . smallHash($linkdate);
$title = 'Note: ';
}
$url = escape($url);
$title = escape($title);
$link = array(
'linkdate' => $linkdate,
'title' => $title,
'url' => $url,
'description' => $description,
'tags' => $tags,
'private' => $private
);
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}
$data = array(
'link' => $link,
'link_is_new' => $link_is_new,
'http_referer' => (isset($_SERVER['HTTP_REFERER']) ? escape($_SERVER['HTTP_REFERER']) : ''),
'source' => (isset($_GET['source']) ? $_GET['source'] : ''),
'tags' => $LINKSDB->allTags(),
'default_private_links' => $conf->get('privacy.default_private_links', false),
);
$pluginManager->executeHooks('render_editlink', $data);
foreach ($data as $key => $value) {
$PAGE->assign($key, $value);
}
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$PAGE->renderPage('editlink');
exit;
}
if ($targetPage == Router::$PAGE_EXPORT) {
// Export links as a Netscape Bookmarks file
if (empty($_GET['selection'])) {
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$PAGE->renderPage('export');
exit;
}
// export as bookmarks_(all|private|public)_YYYYmmdd_HHMMSS.html
$selection = $_GET['selection'];
if (isset($_GET['prepend_note_url'])) {
$prependNoteUrl = $_GET['prepend_note_url'];
} else {
$prependNoteUrl = false;
}
try {
$PAGE->assign(
'links',
NetscapeBookmarkUtils::filterAndFormat(
$LINKSDB,
$selection,
$prependNoteUrl,
index_url($_SERVER)
)
);
} catch (Exception $exc) {
header('Content-Type: text/plain; charset=utf-8');
echo $exc->getMessage();
exit;
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}
$now = new DateTime();
header('Content-Type: text/html; charset=utf-8');
header(
'Content-disposition: attachment; filename=bookmarks_'
.$selection.'_'.$now->format(LinkDB::LINK_DATE_FORMAT).'.html'
);
$PAGE->assign('date', $now->format(DateTime::RFC822));
$PAGE->assign('eol', PHP_EOL);
$PAGE->assign('selection', $selection);
$PAGE->renderPage('export.bookmarks');
exit;
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}
if ($targetPage == Router::$PAGE_IMPORT) {
// Upload a Netscape bookmark dump to import its contents
if (! isset($_POST['token']) || ! isset($_FILES['filetoupload'])) {
// Show import dialog
$PAGE->assign('maxfilesize', getMaxFileSize());
$PAGE->renderPage('import');
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exit;
}
// Import bookmarks from an uploaded file
if (isset($_FILES['filetoupload']['size']) && $_FILES['filetoupload']['size'] == 0) {
// The file is too big or some form field may be missing.
echo '<script>alert("The file you are trying to upload is probably'
.' bigger than what this webserver can accept ('
.getMaxFileSize().' bytes).'
.' Please upload in smaller chunks.");document.location=\'?do='
.Router::$PAGE_IMPORT .'\';</script>';
exit;
}
if (! tokenOk($_POST['token'])) {
die('Wrong token.');
}
$status = NetscapeBookmarkUtils::import(
$_POST,
$_FILES,
$LINKSDB,
$conf->get('resource.page_cache')
);
echo '<script>alert("'.$status.'");document.location=\'?do='
.Router::$PAGE_IMPORT .'\';</script>';
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exit;
}
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// Plugin administration page
if ($targetPage == Router::$PAGE_PLUGINSADMIN) {
$pluginMeta = $pluginManager->getPluginsMeta();
// Split plugins into 2 arrays: ordered enabled plugins and disabled.
$enabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] !== false; });
// Load parameters.
$enabledPlugins = load_plugin_parameter_values($enabledPlugins, $conf->get('plugins', array()));
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uasort(
$enabledPlugins,
function($a, $b) { return $a['order'] - $b['order']; }
);
$disabledPlugins = array_filter($pluginMeta, function($v) { return $v['order'] === false; });
$PAGE->assign('enabledPlugins', $enabledPlugins);
$PAGE->assign('disabledPlugins', $disabledPlugins);
$PAGE->renderPage('pluginsadmin');
exit;
}
// Plugin administration form action
if ($targetPage == Router::$PAGE_SAVE_PLUGINSADMIN) {
try {
if (isset($_POST['parameters_form'])) {
unset($_POST['parameters_form']);
foreach ($_POST as $param => $value) {
$conf->set('plugins.'. $param, escape($value));
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}
}
else {
$conf->set('general.enabled_plugins', save_plugin_config($_POST));
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}
$conf->write(isLoggedIn());
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}
catch (Exception $e) {
error_log(
'ERROR while saving plugin configuration:.' . PHP_EOL .
$e->getMessage()
);
// TODO: do not handle exceptions/errors in JS.
echo '<script>alert("'. $e->getMessage() .'");document.location=\'?do='. Router::$PAGE_PLUGINSADMIN .'\';</script>';
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exit;
}
header('Location: ?do='. Router::$PAGE_PLUGINSADMIN);
exit;
}
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// -------- Otherwise, simply display search form and links:
showLinkList($PAGE, $LINKSDB, $conf, $pluginManager);
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exit;
}
/**
* Template for the list of links (<div id="linklist">)
* This function fills all the necessary fields in the $PAGE for the template 'linklist.html'
*
* @param pageBuilder $PAGE pageBuilder instance.
* @param LinkDB $LINKSDB LinkDB instance.
* @param ConfigManager $conf Configuration Manager instance.
* @param PluginManager $pluginManager Plugin Manager instance.
*/
function buildLinkList($PAGE,$LINKSDB, $conf, $pluginManager)
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{
// Used in templates
$searchtags = !empty($_GET['searchtags']) ? escape($_GET['searchtags']) : '';
$searchterm = !empty($_GET['searchterm']) ? escape($_GET['searchterm']) : '';
// Smallhash filter
if (! empty($_SERVER['QUERY_STRING'])
&& preg_match('/^[a-zA-Z0-9-_@]{6}($|&|#)/', $_SERVER['QUERY_STRING'])) {
try {
$linksToDisplay = $LINKSDB->filterHash($_SERVER['QUERY_STRING']);
} catch (LinkNotFoundException $e) {
$PAGE->render404($e->getMessage());
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exit;
}
} else {
// Filter links according search parameters.
$privateonly = !empty($_SESSION['privateonly']);
$linksToDisplay = $LINKSDB->filterSearch($_GET, false, $privateonly);
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}
// ---- Handle paging.
$keys = array();
foreach ($linksToDisplay as $key => $value) {
$keys[] = $key;
}
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// 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;
// Start index.
$i = ($page-1) * $_SESSION['LINKS_PER_PAGE'];
$end = $i + $_SESSION['LINKS_PER_PAGE'];
$linkDisp = array();
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while ($i<$end && $i<count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$link['description'] = format_description($link['description'], $conf->get('redirector.url'));
$classLi = ($i % 2) != 0 ? '' : 'publicLinkHightLight';
$link['class'] = $link['private'] == 0 ? $classLi : 'private';
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
$link['timestamp'] = $date->getTimestamp();
if (! empty($link['updated'])) {
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['updated']);
$link['updated_timestamp'] = $date->getTimestamp();
} else {
$link['updated_timestamp'] = '';
}
$taglist = explode(' ', $link['tags']);
uasort($taglist, 'strcasecmp');
$link['taglist'] = $taglist;
$link['shorturl'] = smallHash($link['linkdate']);
// Check for both signs of a note: starting with ? and 7 chars long.
if ($link['url'][0] === '?' &&
strlen($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
$searchtagsUrl = empty($searchtags) ? '' : '&searchtags=' . urlencode($searchtags);
$searchtermUrl = empty($searchterm) ? '' : '&searchterm=' . urlencode($searchterm);
$previous_page_url = '';
if ($i != count($keys)) {
$previous_page_url = '?page=' . ($page+1) . $searchtermUrl . $searchtagsUrl;
}
$next_page_url='';
if ($page>1) {
$next_page_url = '?page=' . ($page-1) . $searchtermUrl . $searchtagsUrl;
}
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// Fill all template fields.
$data = array(
'previous_page_url' => $previous_page_url,
'next_page_url' => $next_page_url,
'page_current' => $page,
'page_max' => $pagecount,
'result_count' => count($linksToDisplay),
'search_term' => $searchterm,
'search_tags' => $searchtags,
'redirector' => $conf->get('redirector.url'), // Optional redirector URL.
'links' => $linkDisp,
'tags' => $LINKSDB->allTags(),
);
// If there is only a single link, we change on-the-fly the title of the page.
if (count($linksToDisplay) == 1) {
$data['pagetitle'] = $linksToDisplay[$keys[0]]['title'] .' - '. $conf->get('general.title');
}
$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.
* Understands various services (youtube.com...)
* Input: $url = URL for which the thumbnail must be found.
* $href = if provided, this URL will be followed instead of $url
* Returns an associative array with thumbnail attributes (src,href,width,height,style,alt)
* Some of them may be missing.
* Return an empty array if no thumbnail available.
*
* @param ConfigManager $conf Configuration Manager instance.
* @param string $url
* @param string|bool $href
*
* @return array
*/
function computeThumbnail($conf, $url, $href = false)
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{
if (!$conf->get('thumbnail.enable_thumbnails')) return array();
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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 (! $conf->get('thumbnail.enable_localcache')) return array(); // If local cache is disabled, no thumbnails for services which require the use a local cache.
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if ($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, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_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, $conf->get('credentials.salt')); // We use the salt to sign data (it's random, secret, and specific to each installation)
return array('src'=>index_url($_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)
{
// FIXME!
global $conf;
$t = computeThumbnail($conf, $url,$href);
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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 $url
// Returns '' if no thumbnail available.
function lazyThumbnail($conf, $url,$href=false)
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{
// FIXME!
global $conf;
$t = computeThumbnail($conf, $url,$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.
*
* @param ConfigManager $conf Configuration Manager instance.
*/
function install($conf)
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{
// 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']))
{
$tz = 'UTC';
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if (!empty($_POST['continent']) && !empty($_POST['city'])
&& isTimeZoneValid($_POST['continent'], $_POST['city'])
) {
$tz = $_POST['continent'].'/'.$_POST['city'];
}
$conf->set('general.timezone', $tz);
$login = $_POST['setlogin'];
$conf->set('credentials.login', $login);
$salt = sha1(uniqid('', true) .'_'. mt_rand());
$conf->set('credentials.salt', $salt);
$conf->set('credentials.hash', sha1($_POST['setpassword'] . $login . $salt));
if (!empty($_POST['title'])) {
$conf->set('general.title', escape($_POST['title']));
} else {
$conf->set('general.title', 'Shared links on '.escape(index_url($_SERVER)));
}
$conf->set('updates.check_updates', !empty($_POST['updateCheck']));
try {
// Everything is ok, let's create config file.
$conf->write(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>';
}
$PAGE = new PageBuilder($conf);
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$PAGE->assign('timezone_html',$timezone_html);
$PAGE->assign('timezone_js',$timezone_js);
$PAGE->renderPage('install');
exit;
}
/**
* Because some f*cking services like flickr require an extra HTTP request to get the thumbnail URL,
* I have deported the thumbnail URL code generation here, otherwise this would slow down page generation.
* The following function takes the URL a link (e.g. a flickr page) and return the proper thumbnail.
* This function is called by passing the URL:
* http://mywebsite.com/shaarli/?do=genthumbnail&hmac=[HMAC]&url=[URL]
* [URL] is the URL of the link (e.g. a flickr page)
* [HMAC] is the signature for the [URL] (so that these URL cannot be forged).
* The function below will fetch the image from the webservice and store it in the cache.
*
* @param ConfigManager $conf Configuration Manager instance,
*/
function genThumbnail($conf)
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{
// Make sure the parameters in the URL were generated by us.
$sign = hash_hmac('sha256', $_GET['url'], $conf->get('credentials.salt'));
if ($sign!=$_GET['hmac']) die('Naughty boy!');
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$cacheDir = $conf->get('resource.thumbnails_cache', 'cache');
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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($cacheDir .'/'. $thumbname))
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{ // We have the thumbnail, just serve it:
header('Content-Type: image/jpeg');
echo file_get_contents($cacheDir .'/'. $thumbname);
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return;
}
// We may also serve a blank image (if service did not respond)
$blankname=hash('sha1',$_GET['url']).'.gif';
if (is_file($cacheDir .'/'. $blankname))
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{
header('Content-Type: image/gif');
echo file_get_contents($cacheDir .'/'. $blankname);
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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 ?
$imageurl='';
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if (endsWith(parse_url($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, $content) = get_http_response($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.
preg_match('!<link rel=\"image_src\" href=\"(.+?)\"!', $content, $matches);
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if (!empty($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=\"(.+?)\"!', $content, $matches);
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if (!empty($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, $content) = get_http_response($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
// Save image to cache.
file_put_contents($cacheDir .'/'. $thumbname, $content);
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header('Content-Type: image/jpeg');
echo $content;
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return;
}
}
}
elseif ($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, $content) = get_http_response('https://vimeo.com/api/v2/video/'.escape($vid).'.php', 5);
if (strpos($headers[0], '200 OK') !== false) {
$t = unserialize($content);
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$imageurl = $t[0]['thumbnail_medium'];
// Then we download the image and serve it to our client.
list($headers, $content) = get_http_response($imageurl, 10);
if (strpos($headers[0], '200 OK') !== false) {
// Save image to cache.
file_put_contents($cacheDir .'/'. $thumbname, $content);
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header('Content-Type: image/jpeg');
echo $content;
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return;
}
}
}
elseif ($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, $content) = get_http_response($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)"!', $content, $matches);
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if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $content) = get_http_response($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir .'/'. $thumbname;
file_put_contents($filepath, $content); // Save image to cache.
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if (resizeImage($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, $content) = get_http_response($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]!', $content, $matches);
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if (!empty($matches[1]))
{ // Let's download the image.
$imageurl=$matches[1];
// No control on image size, so wait long enough
list($headers, $content) = get_http_response($imageurl, 20);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir.'/'.$thumbname;
// Save image to cache.
file_put_contents($filepath, $content);
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if (resizeImage($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, $content) = get_http_response($url, 30);
if (strpos($headers[0], '200 OK') !== false) {
$filepath = $cacheDir .'/'.$thumbname;
// Save image to cache.
file_put_contents($filepath, $content);
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if (resizeImage($filepath))
{
header('Content-Type: image/jpeg');
echo file_get_contents($filepath);
return;
}
}
}
// Otherwise, return an empty image (8x8 transparent gif)
$blankgif = base64_decode('R0lGODlhCAAIAIAAAP///////yH5BAEKAAEALAAAAAAIAAgAAAIHjI+py+1dAAA7');
// Also put something in cache so that this URL is not requested twice.
file_put_contents($cacheDir .'/'. $blankname, $blankgif);
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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;
}
if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=genthumbnail')) { genThumbnail($conf); exit; } // Thumbnail generation/cache does not need the link database.
if (isset($_SERVER['QUERY_STRING']) && startsWith($_SERVER['QUERY_STRING'], 'do=dailyrss')) { showDailyRSS($conf); exit; }
if (!isset($_SESSION['LINKS_PER_PAGE'])) {
$_SESSION['LINKS_PER_PAGE'] = $conf->get('general.links_per_page', 20);
}
renderPage($conf, $pluginManager);