253 lines
7.4 KiB
PHP
Executable File
253 lines
7.4 KiB
PHP
Executable File
<?php
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/**
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* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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class OC_Request {
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const USER_AGENT_IE = '/MSIE/';
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// Android Chrome user agent: https://developers.google.com/chrome/mobile/docs/user-agent
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const USER_AGENT_ANDROID_MOBILE_CHROME = '#Android.*Chrome/[.0-9]*#';
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/**
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* @brief Check overwrite condition
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* @param string $type
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* @returns bool
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*/
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private static function isOverwriteCondition($type = '') {
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$regex = '/' . OC_Config::getValue('overwritecondaddr', '') . '/';
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return $regex === '//' or preg_match($regex, $_SERVER['REMOTE_ADDR']) === 1
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or ($type !== 'protocol' and OC_Config::getValue('forcessl', false));
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}
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/**
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* @brief Checks whether a domain is considered as trusted. This is used to prevent Host Header Poisoning.
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* @param string $host
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* @return bool
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*/
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public static function isTrustedDomain($domain) {
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$trustedList = \OC_Config::getValue('trusted_domains', array(''));
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return in_array($domain, $trustedList);
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}
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/**
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* @brief Returns the server host
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* @returns string the server host
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*
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* Returns the server host, even if the website uses one or more
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* reverse proxies
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*/
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public static function serverHost() {
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if(OC::$CLI) {
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return 'localhost';
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}
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if(OC_Config::getValue('overwritehost', '') !== '' and self::isOverwriteCondition()) {
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return OC_Config::getValue('overwritehost');
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}
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if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
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if (strpos($_SERVER['HTTP_X_FORWARDED_HOST'], ",") !== false) {
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$host = trim(array_pop(explode(",", $_SERVER['HTTP_X_FORWARDED_HOST'])));
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}
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else{
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$host = $_SERVER['HTTP_X_FORWARDED_HOST'];
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}
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} else {
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if (isset($_SERVER['HTTP_HOST'])) {
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$host = $_SERVER['HTTP_HOST'];
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}
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else if (isset($_SERVER['SERVER_NAME'])) {
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$host = $_SERVER['SERVER_NAME'];
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}
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}
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// Verify that the host is a trusted domain if the trusted domains
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// are defined
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// If no trusted domain is provided the first trusted domain is returned
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if(self::isTrustedDomain($host) || \OC_Config::getValue('trusted_domains', "") === "") {
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return $host;
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} else {
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$trustedList = \OC_Config::getValue('trusted_domains', array(''));
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return $trustedList[0];
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}
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}
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/**
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* @brief Returns the server protocol
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* @returns string the server protocol
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*
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* Returns the server protocol. It respects reverse proxy servers and load balancers
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*/
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public static function serverProtocol() {
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if(OC_Config::getValue('overwriteprotocol', '') !== '' and self::isOverwriteCondition('protocol')) {
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return OC_Config::getValue('overwriteprotocol');
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}
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if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
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$proto = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']);
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// Verify that the protocol is always HTTP or HTTPS
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// default to http if an invalid value is provided
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return $proto === 'https' ? 'https' : 'http';
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}
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if (isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') {
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return 'https';
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}
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return 'http';
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}
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/**
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* @brief Returns the request uri
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* @returns string the request uri
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*
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* Returns the request uri, even if the website uses one or more
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* reverse proxies
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*/
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public static function requestUri() {
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$uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
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if (OC_Config::getValue('overwritewebroot', '') !== '' and self::isOverwriteCondition()) {
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$uri = self::scriptName() . substr($uri, strlen($_SERVER['SCRIPT_NAME']));
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}
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return $uri;
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}
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/**
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* @brief Returns the script name
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* @returns string the script name
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*
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* Returns the script name, even if the website uses one or more
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* reverse proxies
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*/
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public static function scriptName() {
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$name = $_SERVER['SCRIPT_NAME'];
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if (OC_Config::getValue('overwritewebroot', '') !== '' and self::isOverwriteCondition()) {
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$serverroot = str_replace("\\", '/', substr(__DIR__, 0, -strlen('lib/private/')));
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$suburi = str_replace("\\", "/", substr(realpath($_SERVER["SCRIPT_FILENAME"]), strlen($serverroot)));
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$name = OC_Config::getValue('overwritewebroot', '') . $suburi;
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}
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return $name;
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}
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/**
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* @brief get Path info from request
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* @returns string Path info or false when not found
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*/
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public static function getPathInfo() {
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if (array_key_exists('PATH_INFO', $_SERVER)) {
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$path_info = $_SERVER['PATH_INFO'];
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}else{
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$path_info = self::getRawPathInfo();
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// following is taken from Sabre_DAV_URLUtil::decodePathSegment
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$path_info = rawurldecode($path_info);
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$encoding = mb_detect_encoding($path_info, array('UTF-8', 'ISO-8859-1'));
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switch($encoding) {
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case 'ISO-8859-1' :
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$path_info = utf8_encode($path_info);
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}
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// end copy
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}
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return $path_info;
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}
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/**
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* @brief get Path info from request, not urldecoded
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* @returns string Path info or false when not found
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*/
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public static function getRawPathInfo() {
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$requestUri = $_SERVER['REQUEST_URI'];
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// remove too many leading slashes - can be caused by reverse proxy configuration
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if (strpos($requestUri, '/') === 0) {
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$requestUri = '/' . ltrim($requestUri, '/');
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}
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// Remove the query string from REQUEST_URI
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if ($pos = strpos($requestUri, '?')) {
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$requestUri = substr($requestUri, 0, $pos);
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}
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$scriptName = $_SERVER['SCRIPT_NAME'];
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$path_info = $requestUri;
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// strip off the script name's dir and file name
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list($path, $name) = \Sabre_DAV_URLUtil::splitPath($scriptName);
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if (!empty($path)) {
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if( $path === $path_info || strpos($path_info, $path.'/') === 0) {
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$path_info = substr($path_info, strlen($path));
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} else {
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throw new Exception("The requested uri($requestUri) cannot be processed by the script '$scriptName')");
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}
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}
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if (strpos($path_info, '/'.$name) === 0) {
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$path_info = substr($path_info, strlen($name) + 1);
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}
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if (strpos($path_info, $name) === 0) {
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$path_info = substr($path_info, strlen($name));
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}
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if($path_info === '/'){
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return '';
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} else {
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return $path_info;
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}
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}
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/**
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* @brief Check if this is a no-cache request
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* @returns boolean true for no-cache
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*/
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static public function isNoCache() {
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if (!isset($_SERVER['HTTP_CACHE_CONTROL'])) {
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return false;
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}
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return $_SERVER['HTTP_CACHE_CONTROL'] == 'no-cache';
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}
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/**
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* @brief Check if the requestor understands gzip
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* @returns boolean true for gzip encoding supported
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*/
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static public function acceptGZip() {
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if (!isset($_SERVER['HTTP_ACCEPT_ENCODING'])) {
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return false;
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}
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$HTTP_ACCEPT_ENCODING = $_SERVER["HTTP_ACCEPT_ENCODING"];
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if( strpos($HTTP_ACCEPT_ENCODING, 'x-gzip') !== false )
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return 'x-gzip';
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else if( strpos($HTTP_ACCEPT_ENCODING, 'gzip') !== false )
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return 'gzip';
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return false;
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}
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/**
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* @brief Check if the requester sent along an mtime
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* @returns false or an mtime
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*/
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static public function hasModificationTime () {
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if (isset($_SERVER['HTTP_X_OC_MTIME'])) {
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return $_SERVER['HTTP_X_OC_MTIME'];
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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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* Checks whether the user agent matches a given regex
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* @param string|array $agent agent name or array of agent names
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* @return boolean true if at least one of the given agent matches,
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* false otherwise
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*/
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static public function isUserAgent($agent) {
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if (!is_array($agent)) {
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$agent = array($agent);
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}
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foreach ($agent as $regex) {
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if (preg_match($regex, $_SERVER['HTTP_USER_AGENT'])) {
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return true;
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}
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}
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return false;
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}
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}
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