mirror of
https://github.com/EGroupware/egroupware.git
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118 lines
3.3 KiB
PHP
118 lines
3.3 KiB
PHP
<?php
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/**
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* EGroupware API: VFS sharing
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @author Ralf Becker <rb@stylite.de>
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* @copyright (c) 2014 by Ralf Becker <rb@stylite.de>
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* @version $Id$
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*/
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/**
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* VFS sharing
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*
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* Token generation uses openssl_random_pseudo_bytes, if available, otherwise
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* mt_rand based auth::randomstring is used.
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*/
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class egw_sharing
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{
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/**
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* Length of base64 encoded token (real length is only 3/4 of it)
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*/
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const TOKEN_LENGTH = 64;
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/**
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* Name of table used for storing tokens
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*/
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const TABLE = 'egw_sharing';
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/**
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* Reference to global db object
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*
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* @var egw_db
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*/
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protected $db;
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/**
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* Constructor
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*/
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public function __construct()
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{
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$this->db = $GLOBALS['egw']->db;
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}
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/**
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* Server a request on a share specified in REQUEST_URI
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*/
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public function ServeRequest()
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{
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// WebDAV has no concept of a query string and clients (including cadaver)
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// seem to pass '?' unencoded, so we need to extract the path info out
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// of the request URI ourselves
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// if request URI contains a full url, remove schema and domain
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$matches = null;
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if (preg_match('|^https?://[^/]+(/.*)$|', $path_info=$_SERVER['REQUEST_URI'], $matches))
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{
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$path_info = $matches[1];
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}
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$path_info = substr($path_info, strlen($_SERVER['SCRIPT_NAME']));
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list(, $token/*, $path*/) = explode('/', $path_info, 3);
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if (empty($token) || !($share = $this->db->select(self::TABLE, '*', array(
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'share_token' => $token,
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'(share_expires IS NULL OR share_expires > '.$this->db->quote(time(), 'date').')',
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), __LINE__, __FILE__)->fetch()))
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{
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sleep(1);
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$status = '404 Not Found';
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header("HTTP/1.1 $status");
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header("X-WebDAV-Status: $status", true);
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echo "Requested resource '".htmlspecialchars($path_info)."' does NOT exist!\n";
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common::egw_exit();
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}
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$share['resolve_url'] = egw_vfs::resolve_url($share['share_path']);
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// if share not writable append ro=1 to mount url to make it readonly
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if (!$this->db->from_bool($share['share_writable']))
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{
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$share['resolve_url'] .= (strpos($share['resolve_url'], '?') ? '&' : '?').'ro=1';
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}
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//_debug_array($share);
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// arrange vfs to only contain shared url
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egw_vfs::$is_root = true;
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if (!egw_vfs::mount($share['resolve_url'], '/', false, false, true))
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{
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sleep(1);
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$status = '404 Not Found';
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header("HTTP/1.1 $status");
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header("X-WebDAV-Status: $status", true);
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echo "Requested resource '".htmlspecialchars($path_info)."' does NOT exist!\n";
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common::egw_exit();
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}
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egw_vfs::$is_root = false;
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egw_vfs::$user = $GLOBALS['egw_info']['user']['account_id'] = $share['share_owner'];
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egw_vfs::clearstatcache();
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// ToDo: password and write protection
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//$GLOBALS['egw']->session->commit_session();
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$webdav_server = new vfs_webdav_server();
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$webdav_server->ServeRequest('/'.$token);
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}
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/**
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* Generate a new token
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*
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* @return string
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*/
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public static function token()
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{
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// generate random token (using oppenssl if available otherwise mt_rand based auth::randomstring)
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$token = function_exists('openssl_random_pseudo_bytes') ?
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base64_encode(openssl_random_pseudo_bytes(3*self::TOKEN_LENGTH/4)) :
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auth::randomstring(self::TOKEN_LENGTH);
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return $token;
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}
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} |