forked from extern/egroupware
608 lines
20 KiB
PHP
608 lines
20 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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* @subpackage Vfs
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* @author Ralf Becker <rb@stylite.de>
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* @copyright (c) 2014-16 by Ralf Becker <rb@stylite.de>
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* @version $Id$
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*/
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namespace EGroupware\Api\Vfs;
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use EGroupware\Api;
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use EGroupware\Api\Json\Response;
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use EGroupware\Api\Vfs;
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use EGroupware\Filemanager\Sharing\AnonymousList;
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use EGroupware\Filemanager\Sharing\Ui;
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use EGroupware\Filemanager\Sharing\Ui as ShareUi;
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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 Api\Auth::randomstring is used.
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*
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* Existing user sessions are kept whenever possible by an additional mount into regular VFS:
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* - share owner is current user (no problems with rights, they simply match)
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* - share owner has owner-right for share: we create a temp. eACL for current user
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* --> in all other cases session will be replaced with one of the anonymous user,
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* as we dont support mounting with rights of share owner (VFS uses Vfs::$user!)
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*
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* @todo handle mounts of an entry directory /apps/$app/$id
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* @todo handle mounts inside shared directory (they get currently lost)
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* @todo handle absolute symlinks (wont work as we use share as root)
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*/
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class Sharing extends \EGroupware\Api\Sharing
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{
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/**
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* Modes ATTACH is NOT a sharing mode, but it is traditional mode in email
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*/
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const ATTACH = 'attach';
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const LINK = 'link';
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const READONLY = 'share_ro';
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const WRITABLE = 'share_rw';
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const HIDDEN_UPLOAD = 9; // 8 is the next bitwise flag + 1 for writable
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const HIDDEN_UPLOAD_DIR = '/Upload';
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/**
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* Modes for sharing files
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*
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* @var array
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*/
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static $modes = array(
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self::ATTACH => array(
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'label' => 'Attachment',
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'title' => 'Works reliable for total size up to 1-2 MB, might work for 5-10 MB, most likely to fail for >10MB',
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),
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self::LINK => array(
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'label' => 'Download link',
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'title' => 'Link is appended to mail allowing recipients to download currently attached version of files',
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),
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self::READONLY => array(
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'label' => 'Readonly share',
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'title' => 'Link is appended to mail allowing recipients to download up to date version of files',
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),
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self::WRITABLE => array(
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'label' => 'Writable share',
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'title' => 'Link is appended to mail allowing recipients to download or modify up to date version of files (EPL only)'
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),
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);
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/**
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* Subdirectory of user's home directory to mount shares into
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*/
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const SHARES_DIRECTORY = 'shares';
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/**
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* Create sharing session
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*
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* There are two cases:
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*
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* 1) there is no session $keep_session === null
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* --> create new anon session with just filemanager rights and resolved share incl. sharee as only fstab entry
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*
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* 2) there is a (non-anonymous) session $keep_session === true
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* --> mount share with sharing stream-wrapper into users "shares" subdirectory of home directory
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* and ask user if he wants the share permanently mounted there
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*
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* Even with sharing stream-wrapper a) and b) need to be different, as sharing SW needs an intact fstab!
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*
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* Not yet sure if this still needs extra handling:
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*
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* 2a) single file or WebDAV
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* --> modify EGroupware enviroment for that request only, no change in session
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*
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* @param boolean $keep_session =null null: create a new session, true: try mounting it into existing (already verified) session
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* @return string with sessionid, does NOT return if no session created
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*/
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public static function setup_share($keep_session, &$share)
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{
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// need to reset fs_tab, as resolve_url does NOT work with just share mounted
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if (empty($GLOBALS['egw_info']['server']['vfs_fstab']) || count($GLOBALS['egw_info']['server']['vfs_fstab']) <= 1)
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{
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unset($GLOBALS['egw_info']['server']['vfs_fstab']); // triggers reset of fstab in mount()
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$GLOBALS['egw_info']['server']['vfs_fstab'] = Vfs::mount();
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Vfs::clearstatcache();
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}
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// for a regular user session, mount the share into "shares" subdirectory of his home-directory
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if ($keep_session && $GLOBALS['egw_info']['user']['account_lid'] && $GLOBALS['egw_info']['user']['account_lid'] !== 'anonymous')
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{
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$shares_dir = '/home/'.Vfs::encodePathComponent($GLOBALS['egw_info']['user']['account_lid']).'/'.self::SHARES_DIRECTORY;
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if (!Vfs::file_exists($shares_dir)) Vfs::mkdir($shares_dir, 0750, true);
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$share['share_root'] = Vfs::concat($shares_dir, Vfs::basename($share['share_path']));
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// ToDo: handle there's already something there with that name (incl. maybe the same share!)
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Vfs::$is_root = true;
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if (!Vfs::mount(Vfs\Sharing\StreamWrapper::share2url($share), $share['share_root'], false, false, false))
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{
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sleep(1);
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return static::share_fail(
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'404 Not Found',
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"Requested resource '/".htmlspecialchars($share['share_token'])."' does NOT exist!\n"
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);
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}
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Vfs::$is_root = false;
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// get_ui() will ask user if he wants the share permanently mounted
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return;
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}
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/**
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* From here on pure sharing url without regular EGroupware user (session)
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*/
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$share['resolve_url'] = Vfs::build_url([
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'user' => Api\Accounts::id2name($share['share_owner']),
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]+Vfs::parse_url(Vfs::resolve_url($share['share_path'], true, true, true, true))); // true = fix evtl. contained url parameter
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// if share not writable append ro=1 to mount url to make it readonly
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if (!($share['share_writable'] & 1))
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{
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$share['resolve_url'] .= (strpos($share['resolve_url'], '?') ? '&' : '?').'ro=1';
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}
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$share['share_root'] = '/';
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// only allow filemanager app & collabora
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// In some cases, $GLOBALS['egw_info']['apps'] is not yet set at all. Set it to app => true, it will be used
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// in Session->read_repositories() to make sure we get access to these apps when the session loads the apps.
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$apps = $GLOBALS['egw']->acl->get_user_applications($share['share_owner']);
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$GLOBALS['egw_info']['user']['apps'] = array(
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'filemanager' => $GLOBALS['egw_info']['apps']['filemanager'] || true,
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'collabora' => $GLOBALS['egw_info']['apps']['collabora'] || $apps['collabora']
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);
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// Need to re-init stream wrapper, as some of them look at preferences or permissions
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$class = Vfs\StreamWrapper::scheme2class(Vfs::parse_url($share['resolve_url'],PHP_URL_SCHEME));
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if($class && method_exists($class, 'init_static'))
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{
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$class::init_static();
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}
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// mounting share
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Vfs::$is_root = true;
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if (!Vfs::mount($share['resolve_url'], $share['share_root'], false, false, true))
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{
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sleep(1);
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return static::share_fail(
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'404 Not Found',
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"Requested resource '/".htmlspecialchars($share['share_token'])."' does NOT exist!\n"
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);
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}
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/* ToDo: is this still needed and for what reason, as Vfs::mount() already supports session / non-persistent mounts
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$session_fstab =& Api\Cache::getSession('api', 'fstab');
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if(!$session_fstab)
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{
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$session_fstab = array();
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}
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foreach($session_fstab as $mount => $info)
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{
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Vfs::mount($info['mount'], $mount, false, false);
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}
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static::session_mount($share['share_root'], $share['resolve_url']);*/
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Vfs::$is_root = false;
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Vfs::clearstatcache();
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// clear link-cache and load link registry without permission check to access /apps
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Api\Link::init_static(true);
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}
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/**
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* Just temporary until we get the share streamwrapper in
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* @param $target
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* @param $mount
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*/
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protected static function session_mount($target, $mount)
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{
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$session_fstab =& Api\Cache::getSession('api', 'fstab');
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if(!$session_fstab)
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{
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$session_fstab = array();
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}
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$session_fstab[$target] = array(
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'mount' => $mount,
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'class' => get_called_class()
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);
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}
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protected static function after_login($share)
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{
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// only allow filemanager app (gets overwritten by session::create)
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$GLOBALS['egw_info']['user']['apps'] = array(
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'filemanager' => $GLOBALS['egw_info']['apps']['filemanager']
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);
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// check if sharee has Collabora run rights --> give is to share too
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$apps = $GLOBALS['egw']->acl->get_user_applications($share['share_owner']);
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if (!empty($apps['collabora']))
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{
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$GLOBALS['egw_info']['user']['apps']['collabora'] = $GLOBALS['egw_info']['apps']['collabora'];
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}
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// session::create also overwrites link-registry
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Vfs::clearstatcache();
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// clear link-cache and load link registry without permission check to access /apps
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Api\Link::init_static(true);
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}
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/**
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* Server a request on a share specified in REQUEST_URI
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*/
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public function get_ui()
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{
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// * Link has already been opened in a new tab by this point *
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// User testing their own share?
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if($GLOBALS['egw_info']['user']['account_id'] == $this->share['share_owner'])
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{
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Api\Framework::message(lang(
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"This is your own share. To test it, use an anonymous / incognito window.\n%1",
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'<a href="'.$_SERVER['REQUEST_URI'].'">' . $this->share['share_root'] . '</a>'
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),'info');
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}
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// Opened within EGroupware. Ask about the share, if the user is not anonymous.
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if($GLOBALS['egw_info']['user']['account_lid'] !== 'anonymous' && $GLOBALS['egw_info']['user']['account_id'] != $this->share['share_owner'])
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{
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// Check to see if this is already permanent mounted share
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$mount_target = Vfs\Sharing\StreamWrapper::share2url($this->share);
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// Logged in user opening someone else's share, but they've opened the URL in its own tab
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if (!Response::isJSONResponse())
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{
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Api\Framework::message(lang(
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"Share mounted. To test it, use an anonymous / incognito window.\n%1",
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'<a href="'.$_SERVER['REQUEST_URI'].'">' . $this->share['share_root'] . '</a>'
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),'info');
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Api\Framework::redirect(Api\Framework::link('/index.php',[
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'menuaction' => 'filemanager.EGroupware\\Filemanager\\Sharing\\Ui.share_received',
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'token' => $this->share['share_token']
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]));
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}
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if(($mounted = array_search($mount_target,$GLOBALS['egw_info']['user']['preferences']['common']['vfs_fstab'])))
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{
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Response::get()->apply('window.opener.egw.open_link',[
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Api\Framework::link('/index.php',[
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'menuaction' => 'filemanager.filemanager_ui.index',
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'path' => $mounted
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]),'filemanager',false,'filemanager'
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]);
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}
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else
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{
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// New share, ask about it
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Response::get()->apply('window.opener.egw.open_link',[
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Api\Framework::link('/index.php',[
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'menuaction' => 'filemanager.EGroupware\\Filemanager\\Sharing\\Ui.share_received',
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'token' => $this->share['share_token']
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]),'filemanager','600x150','filemanager'
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]);
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}
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Response::get()->apply('window.close');
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// Still need to load the list after though, since loading it processes what we just added
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$ui = new \filemanager_ui();
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return $ui->index();
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}
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// run full eTemplate2 UI for directories
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$_GET['path'] = $this->share['share_root'];
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$GLOBALS['egw_info']['user']['preferences']['filemanager']['nm_view'] = 'tile';
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$_GET['cd'] = 'no';
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$GLOBALS['egw_info']['flags']['js_link_registry'] = true;
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$GLOBALS['egw_info']['flags']['currentapp'] = 'filemanager';
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Api\Framework::includeCSS('filemanager', 'sharing');
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$ui = new AnonymousList();
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$ui->index();
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}
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/**
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* Create a new share
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*
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* @param string $action_id Name of the action used to create the share. Allows for customization.
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* @param string $path either path in temp_dir or vfs with optional vfs scheme
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* @param string $mode self::LINK: copy file in users tmp-dir or self::READABLE share given vfs file,
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* if no vfs behave as self::LINK
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* @param string $name filename to use for $mode==self::LINK, default basename of $path
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* @param string|array $recipients one or more recipient email addresses
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* @param array $extra =array() extra data to store
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* @return array with share data, eg. value for key 'share_token'
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* @throw Api\Exception\NotFound if $path not found
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* @throw Api\Exception\AssertionFailed if user temp. directory does not exist and can not be created
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*/
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public static function create(string $action_id, $path, $mode, $name, $recipients, $extra = array())
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{
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if (!isset(self::$db)) self::$db = $GLOBALS['egw']->db;
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$path2tmp =& Api\Cache::getSession(__CLASS__, 'path2tmp');
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$path = static::validate_path($path, $mode);
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if (empty($name)) $name = $path;
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// check if file has been shared before, with identical attributes
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if (($mode != self::LINK ))
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{
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return parent::create($action_id, $path, $mode, $name, $recipients, $extra);
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}
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else
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{
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// if not create new share
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if ($mode == 'link')
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{
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$user_tmp = '/home/'.$GLOBALS['egw_info']['user']['account_lid'].'/.tmp';
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if (!Vfs::file_exists($user_tmp) && !Vfs::mkdir($user_tmp, null, STREAM_MKDIR_RECURSIVE))
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{
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throw new Api\Exception\AssertionFailed("Could NOT create temp. directory '$user_tmp'!");
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}
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$n = 0;
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do {
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$tmp_file = Vfs::concat($user_tmp, ($n?$n.'.':'').Vfs::basename($name));
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}
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while(!(is_dir($path) && Vfs::mkdir($tmp_file, null, STREAM_MKDIR_RECURSIVE) ||
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!is_dir($path) && (!Vfs::file_exists($tmp_file) && ($fp = Vfs::fopen($tmp_file, 'x')) ||
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// do not copy identical files again to users tmp dir, just re-use them
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Vfs::file_exists($tmp_file) && Vfs::compare(Vfs::PREFIX.$tmp_file, $path))) && $n++ < 100);
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if ($n >= 100)
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{
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throw new Api\Exception\AssertionFailed("Could NOT create temp. file '$tmp_file'!");
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}
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if ($fp) fclose($fp);
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if (is_dir($path) && !Vfs::copy_files(array($path), $tmp_file) ||
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!is_dir($path) && !copy($path, Vfs::PREFIX.$tmp_file))
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{
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throw new Api\Exception\AssertionFailed("Could NOT create temp. file '$tmp_file'!");
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}
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// store temp. path in session, to be able to add more recipients
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$path2tmp[$path] = $tmp_file;
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$vfs_path = $tmp_file;
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}
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return parent::create($action_id, $vfs_path, $mode, $name, $recipients, $extra);
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}
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}
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/**
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* Clean and validate the share path
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*
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* @param $path Proposed share path
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* @param $mode Share mode
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* @return string
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*
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* @throws Api\Exception\AssertionFailed
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* @throws Api\Exception\NotFound
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* @throws Api\Exception\WrongParameter
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*/
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protected static function validate_path($path, &$mode)
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{
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// Parent puts the application as a prefix. If we're coming from there, pull it off
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if(strpos($path, 'filemanager::') === 0)
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{
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list(,$path) = explode('::', $path);
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}
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// allow filesystem path only for temp_dir
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$temp_dir = $GLOBALS['egw_info']['server']['temp_dir'].'/';
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if (substr($path, 0, strlen($temp_dir)) == $temp_dir)
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{
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$mode = self::LINK;
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$exists = file_exists($path) && is_readable($path);
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}
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else
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{
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if(parse_url($path, PHP_URL_SCHEME) !== 'vfs')
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{
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$path = Vfs::PREFIX.Vfs::parse_url($path, PHP_URL_PATH);
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}
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// We don't allow sharing paths that contain links, resolve to target instead
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if(($target = Vfs::readlink($path)))
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{
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$path = $target;
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}
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$check = $path;
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do
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{
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if(($delinked = Vfs::readlink($check)))
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{
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if($delinked[strlen($delinked)-1] == '/') $check .='/';
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$path = str_replace($check, $delinked, $path);
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if(parse_url($path, PHP_URL_SCHEME) !== 'vfs')
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{
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$path = Vfs::PREFIX.Vfs::parse_url($path, PHP_URL_PATH);
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}
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$check = $path;
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}
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else
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{
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$check = Vfs::dirname($check);
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}
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} while ($check && $check != '/');
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if (($exists = ($stat = Vfs::stat($path)) && Vfs::check_access($path, Vfs::READABLE, $stat)))
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{
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// Not sure why stat puts a / on the end of files, but remove it
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if(substr($stat['url'],-1) == '/' && !Vfs::is_dir($stat['url']))
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{
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$stat['url'] = substr($stat['url'],0,strlen($stat['url'])-1);
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}
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// Make sure we get the correct path if sharing from a share
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if(isset($GLOBALS['egw']->sharing) && array_key_exists(static::get_token(), $GLOBALS['egw']->sharing) && $exists)
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{
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$path = $stat['url'];
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}
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}
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}
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// check if file exists and is readable
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if (!$exists)
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{
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throw new Api\Exception\NotFound("'$path' NOT found!");
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}
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return $path;
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}
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/**
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* Delete specified shares and unlink temp. files
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*
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* @param int|array $keys
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* @return int number of deleted shares
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*/
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public static function delete($keys)
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{
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self::$db = $GLOBALS['egw']->db;
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if (is_scalar($keys)) $keys = array('share_id' => $keys);
|
|
|
|
// get all temp. files, to be able to delete them
|
|
$tmp_paths = array();
|
|
foreach(self::$db->select(self::TABLE, 'share_path', array(
|
|
"share_path LIKE '/home/%/.tmp/%'")+$keys, __LINE__, __FILE__, false) as $row)
|
|
{
|
|
$tmp_paths[] = $row['share_path'];
|
|
}
|
|
|
|
$deleted = parent::delete($keys);
|
|
|
|
// check if temp. files are used elsewhere
|
|
if ($tmp_paths)
|
|
{
|
|
foreach(self::$db->select(self::TABLE, 'share_path,COUNT(*) AS cnt', array(
|
|
'share_path' => $tmp_paths,
|
|
), __LINE__, __FILE__, false, 'GROUP BY share_path') as $row)
|
|
{
|
|
if (($key = array_search($row['share_path'], $tmp_paths)))
|
|
{
|
|
unset($tmp_paths[$key]);
|
|
}
|
|
}
|
|
// if not delete them
|
|
foreach($tmp_paths as $path)
|
|
{
|
|
Vfs::remove($path);
|
|
}
|
|
}
|
|
return $deleted;
|
|
}
|
|
|
|
/**
|
|
* Check that a share path still exists (and is readable)
|
|
*/
|
|
protected static function check_path($share)
|
|
{
|
|
// remove VFS::PREFIX (vfs://default), as Vfs::file_exists returns false if path does NOT start with a /
|
|
if ($share['share_path'][0] !== '/')
|
|
{
|
|
$share['share_path'] = Api\Vfs::parse_url($share['share_path'], PHP_URL_PATH);
|
|
}
|
|
Vfs::$is_root = true;
|
|
$exists = Vfs::file_exists($share['share_path']);
|
|
Vfs::$is_root = false;
|
|
return $exists;
|
|
}
|
|
|
|
/**
|
|
* Get actions for sharing an entry from filemanager
|
|
*
|
|
* @param string $appname
|
|
* @param int $group Current menu group
|
|
*/
|
|
public static function get_actions($appname, $group = 6)
|
|
{
|
|
$actions = parent::get_actions('filemanager', $group);
|
|
|
|
// This one makes no sense for filemanager
|
|
unset($actions['share']['children']['shareFiles']);
|
|
|
|
// Move these around to mesh nicely if collabora is available
|
|
$actions['share']['children']['shareReadonlyLink']['group'] = 2;
|
|
$actions['share']['children']['shareReadonlyLink']['order'] = 22;
|
|
$actions['share']['children']['shareWritable']['group'] = 3;
|
|
|
|
// Add in merge to document
|
|
if (class_exists($appname.'_merge'))
|
|
{
|
|
$documents = call_user_func(array($appname.'_merge', 'document_action'),
|
|
$GLOBALS['egw_info']['user']['preferences'][$appname]['document_dir'],
|
|
2, 'Insert in document', 'shareDocument_'
|
|
);
|
|
$documents['order'] = 25;
|
|
|
|
// Mail only
|
|
if ($documents['children']['message/rfc822'])
|
|
{
|
|
// Just email already filtered out
|
|
$documents['children'] = $documents['children']['message/rfc822']['children'];
|
|
}
|
|
foreach($documents['children'] as $key => &$document)
|
|
{
|
|
if(strpos($document['target'],'compose_') === FALSE)
|
|
{
|
|
unset($documents['children'][$key]);
|
|
continue;
|
|
}
|
|
|
|
$document['allowOnMultiple'] = true;
|
|
$document['onExecute'] = "javaScript:app.$appname.share_merge";
|
|
}
|
|
$documents['enabled'] = $documents['enabled'] && (boolean)$documents['children'] && !!($GLOBALS['egw_info']['user']['apps']['stylite']);
|
|
$actions['share']['children']['shareDocuments'] = $documents;
|
|
}
|
|
|
|
return $actions;
|
|
}
|
|
|
|
/**
|
|
* Hook callback to watch VFS and remove any shares for files that get moved or removed
|
|
*/
|
|
public static function vfsUpdate($data)
|
|
{
|
|
$path = $data['location'] == 'vfs_rename' ? $data['from'] : $data['path'];
|
|
if (parse_url($path, PHP_URL_SCHEME) !== 'vfs')
|
|
{
|
|
$path = Api\Vfs::PREFIX . ($path[0] == '/' ? '' : '/') . $path;
|
|
}
|
|
if ($data['location'] == 'vfs_rmdir')
|
|
{
|
|
// Normally removing a directory removes the files first, so any shares inside the directory would
|
|
// be handled already, but just in case, get it all.
|
|
$path .= '%';
|
|
}
|
|
|
|
$shares = array();
|
|
foreach ($GLOBALS['egw']->db->select(self::TABLE, array(
|
|
'share_id', 'share_path', 'share_owner'
|
|
),
|
|
array(
|
|
"share_path LIKE " . $GLOBALS['egw']->db->quote($path)
|
|
),
|
|
__LINE__, __FILE__, false) as $share)
|
|
{
|
|
$shares[] = $share;
|
|
}
|
|
foreach ($shares as $share)
|
|
{
|
|
if ($data['location'] == 'vfs_rename')
|
|
{
|
|
if (parse_url($data['to'], PHP_URL_SCHEME) !== 'vfs')
|
|
{
|
|
$data['to'] = $path = Api\Vfs::PREFIX . ($data['to'][0] == '/' ? '' : '/') . $data['to'];
|
|
}
|
|
$GLOBALS['egw']->db->update(self::TABLE, array(
|
|
'share_path' => $data['to']
|
|
), $share, __LINE__, __FILE__);
|
|
}
|
|
else
|
|
{
|
|
static::delete($share['share_id']);
|
|
}
|
|
}
|
|
}
|
|
} |