mirror of
https://github.com/wallabag/wallabag.git
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412 lines
12 KiB
PHP
Executable file
412 lines
12 KiB
PHP
Executable file
<?php
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/**
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* wallabag, self hostable application allowing you to not miss any content anymore
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*
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* @category wallabag
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* @author Nicolas Lœuillet <nicolas@loeuillet.org>
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* @copyright 2013
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* @license http://opensource.org/licenses/MIT see COPYING file
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*/
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final class Tools
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{
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/**
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* Initialize PHP environment
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*/
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public static function initPhp()
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{
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define('START_TIME', microtime(true));
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function stripslashesDeep($value) {
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return is_array($value)
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? array_map('stripslashesDeep', $value)
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: stripslashes($value);
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}
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if (get_magic_quotes_gpc()) {
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$_POST = array_map('stripslashesDeep', $_POST);
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$_GET = array_map('stripslashesDeep', $_GET);
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$_COOKIE = array_map('stripslashesDeep', $_COOKIE);
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}
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ob_start();
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register_shutdown_function('ob_end_flush');
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}
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/**
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* Get wallabag instance URL
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*
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* @return string
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*/
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public static function getPocheUrl()
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{
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$https = (!empty($_SERVER['HTTPS'])
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&& (strtolower($_SERVER['HTTPS']) == 'on'))
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|| (isset($_SERVER["SERVER_PORT"])
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&& $_SERVER["SERVER_PORT"] == '443') // HTTPS detection.
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|| (isset($_SERVER["SERVER_PORT"]) //Custom HTTPS port detection
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&& $_SERVER["SERVER_PORT"] == SSL_PORT)
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|| (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
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&& $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');
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$serverport = (!isset($_SERVER["SERVER_PORT"])
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|| $_SERVER["SERVER_PORT"] == '80'
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|| ($https && $_SERVER["SERVER_PORT"] == '443')
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|| ($https && $_SERVER["SERVER_PORT"]==SSL_PORT) //Custom HTTPS port detection
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? '' : ':' . $_SERVER["SERVER_PORT"]);
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$scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);
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if (!isset($_SERVER["HTTP_HOST"])) {
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return $scriptname;
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}
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$host = (isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']));
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if (strpos($host, ':') !== false) {
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$serverport = '';
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}
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return 'http' . ($https ? 's' : '') . '://'
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. $host . $serverport . $scriptname;
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}
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/**
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* Redirects to a URL
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*
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* @param string $url
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*/
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public static function redirect($url = '')
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{
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if ($url === '') {
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$url = (empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']);
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if (isset($_POST['returnurl'])) {
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$url = $_POST['returnurl'];
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}
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}
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# prevent loop
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if (empty($url) || parse_url($url, PHP_URL_QUERY) === $_SERVER['QUERY_STRING']) {
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$url = Tools::getPocheUrl();
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}
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if (substr($url, 0, 1) !== '?') {
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$ref = Tools::getPocheUrl();
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if (substr($url, 0, strlen($ref)) !== $ref) {
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$url = $ref;
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}
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}
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self::logm('redirect to ' . $url);
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header('Location: '.$url);
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exit();
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}
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/**
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* Returns name of the template file to display
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*
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* @param $view
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* @return string
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*/
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public static function getTplFile($view)
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{
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$views = array(
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'install', 'import', 'export', 'config', 'tags',
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'edit-tags', 'view', 'login', 'error'
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);
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return (in_array($view, $views) ? $view . '.twig' : 'home.twig');
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}
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/**
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* Download a file (typically, for downloading pictures on web server)
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*
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* @param $url
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* @return bool|mixed|string
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*/
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public static function getFile($url)
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{
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$timeout = 15;
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$useragent = "Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0";
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if (in_array ('curl', get_loaded_extensions())) {
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# Fetch feed from URL
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$curl = curl_init();
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curl_setopt($curl, CURLOPT_URL, $url);
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curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
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if (!ini_get('open_basedir') && !ini_get('safe_mode')) {
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curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
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}
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($curl, CURLOPT_HEADER, false);
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# for ssl, do not verified certificate
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curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
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curl_setopt($curl, CURLOPT_AUTOREFERER, TRUE );
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# FeedBurner requires a proper USER-AGENT...
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curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
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curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate");
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curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
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$data = curl_exec($curl);
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$httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
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$httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
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curl_close($curl);
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} else {
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# create http context and add timeout and user-agent
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$context = stream_context_create(
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array(
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'http' => array(
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'timeout' => $timeout,
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'header' => "User-Agent: " . $useragent,
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'follow_location' => true
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),
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'ssl' => array(
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'verify_peer' => false,
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'allow_self_signed' => true
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)
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)
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);
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# only download page lesser than 4MB
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$data = @file_get_contents($url, false, $context, -1, 4000000);
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if (isset($http_response_header) and isset($http_response_header[0])) {
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$httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== FALSE) or (strpos($http_response_header[0], '301 Moved Permanently') !== FALSE));
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}
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}
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# if response is not empty and response is OK
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if (isset($data) and isset($httpcodeOK) and $httpcodeOK) {
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# take charset of page and get it
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preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
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# if meta tag is found
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if (!empty($meta[0])) {
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preg_match('#charset="?(.*)"#si', $meta[0], $encoding);
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# if charset is found set it otherwise, set it to utf-8
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$html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8';
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if (empty($encoding[1])) $encoding[1] = 'utf-8';
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} else {
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$html_charset = 'utf-8';
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$encoding[1] = '';
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}
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# replace charset of url to charset of page
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$data = str_replace('charset=' . $encoding[1], 'charset=' . $html_charset, $data);
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return $data;
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}
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else {
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return FALSE;
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}
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}
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/**
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* Headers for JSON export
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*
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* @param $data
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*/
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public static function renderJson($data)
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{
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header('Cache-Control: no-cache, must-revalidate');
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header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
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header('Content-type: application/json; charset=UTF-8');
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echo json_encode($data);
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exit();
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}
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/**
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* Create new line in log file
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*
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* @param $message
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*/
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public static function logm($message)
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{
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if (DEBUG_POCHE && php_sapi_name() != 'cli') {
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$t = strval(date('Y/m/d_H:i:s')) . ' - ' . $_SERVER["REMOTE_ADDR"] . ' - ' . strval($message) . "\n";
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file_put_contents(CACHE . '/log.txt', $t, FILE_APPEND);
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error_log('DEBUG POCHE : ' . $message);
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}
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}
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/**
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* Encode a URL by using a salt
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*
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* @param $string
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* @return string
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*/
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public static function encodeString($string)
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{
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return sha1($string . SALT);
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}
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/**
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* Cleans a variable
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*
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* @param $var
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* @param string $default
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* @return string
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*/
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public static function checkVar($var, $default = '')
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{
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return ((isset($_REQUEST["$var"])) ? htmlentities($_REQUEST["$var"]) : $default);
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}
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/**
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* Returns the domain name for a URL
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*
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* @param $url
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* @return string
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*/
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public static function getDomain($url)
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{
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return parse_url($url, PHP_URL_HOST);
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}
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/**
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* For a given text, we calculate reading time for an article
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*
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* @param $text
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* @return float
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*/
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public static function getReadingTime($text)
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{
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return floor(str_word_count(strip_tags($text)) / 200);
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}
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/**
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* Returns the correct header for a status code
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*
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* @param $status_code
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*/
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private static function _status($status_code)
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{
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if (strpos(php_sapi_name(), 'apache') !== false) {
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header('HTTP/1.0 '.$status_code);
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}
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else {
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header('Status: '.$status_code);
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}
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}
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/**
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* Get the content for a given URL (by a call to FullTextFeed)
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*
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* @param Url $url
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* @return mixed
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*/
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public static function getPageContent(Url $url)
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{
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// Saving and clearing context
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$REAL = array();
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foreach( $GLOBALS as $key => $value ) {
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if( $key != 'GLOBALS' && $key != '_SESSION' && $key != 'HTTP_SESSION_VARS' ) {
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$GLOBALS[$key] = array();
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$REAL[$key] = $value;
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}
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}
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// Saving and clearing session
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if (isset($_SESSION)) {
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$REAL_SESSION = array();
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foreach( $_SESSION as $key => $value ) {
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$REAL_SESSION[$key] = $value;
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unset($_SESSION[$key]);
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}
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}
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// Running code in different context
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$scope = function() {
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extract( func_get_arg(1) );
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$_GET = $_REQUEST = array(
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"url" => $url->getUrl(),
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"max" => 5,
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"links" => "preserve",
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"exc" => "",
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"format" => "json",
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"submit" => "Create Feed"
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);
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ob_start();
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require func_get_arg(0);
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$json = ob_get_contents();
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ob_end_clean();
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return $json;
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};
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$json = $scope("inc/3rdparty/makefulltextfeed.php", array("url" => $url));
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// Clearing and restoring context
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foreach ($GLOBALS as $key => $value) {
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if($key != "GLOBALS" && $key != "_SESSION" ) {
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unset($GLOBALS[$key]);
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}
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}
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foreach ($REAL as $key => $value) {
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$GLOBALS[$key] = $value;
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}
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// Clearing and restoring session
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if (isset($REAL_SESSION)) {
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foreach($_SESSION as $key => $value) {
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unset($_SESSION[$key]);
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}
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foreach($REAL_SESSION as $key => $value) {
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$_SESSION[$key] = $value;
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}
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}
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return json_decode($json, true);
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}
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/**
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* Returns whether we handle an AJAX (XMLHttpRequest) request.
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*
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* @return boolean whether we handle an AJAX (XMLHttpRequest) request.
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*/
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public static function isAjaxRequest()
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{
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return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest';
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}
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/*
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* Empty cache folder
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*/
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public static function emptyCache()
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{
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$files = new RecursiveIteratorIterator(
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new RecursiveDirectoryIterator(CACHE, RecursiveDirectoryIterator::SKIP_DOTS),
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RecursiveIteratorIterator::CHILD_FIRST
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);
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foreach ($files as $fileInfo) {
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$todo = ($fileInfo->isDir() ? 'rmdir' : 'unlink');
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$todo($fileInfo->getRealPath());
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}
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Tools::logm('empty cache');
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Tools::redirect();
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}
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public static function generateToken()
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{
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if (ini_get('open_basedir') === '') {
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if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
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// alternative to /dev/urandom for Windows
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$token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
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} else {
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$token = substr(base64_encode(file_get_contents('/dev/urandom', false, null, 0, 20)), 0, 15);
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}
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}
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else {
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$token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
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}
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return str_replace('+', '', $token);
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}
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}
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