forked from extern/egroupware
1273 lines
40 KiB
PHP
1273 lines
40 KiB
PHP
<?php
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/**
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* eGroupWare API: VFS - static methods to use the new eGW virtual file system
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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 <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2008-9 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @version $Id$
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*/
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/**
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* Class containing static methods to use the new eGW virtual file system
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*
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* This extension of the vfs stream-wrapper allows to use the following static functions,
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* which only allow access to the eGW VFS and need no 'vfs://default' prefix for filenames:
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*
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* - resource egw_vfs::fopen($path,$mode) like fopen, returned resource can be used with fwrite etc.
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* - resource egw_vfs::opendir($path) like opendir, returned resource can be used with readdir etc.
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* - boolean egw_vfs::copy($from,$to) like copy
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* - boolean egw_vfs::rename($old,$new) renaming or moving a file in the vfs
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* - boolean egw_vfs::mkdir($path) creating a new dir in the vfs
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* - boolean egw_vfs::rmdir($path) removing (an empty) directory
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* - boolean egw_vfs::unlink($path) removing a file
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* - boolean egw_vfs::touch($path,$mtime=null) touch a file
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* - boolean egw_vfs::stat($path) returning status of file like stat(), but only with string keys (no numerical indexes)!
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*
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* With the exception of egw_vfs::touch() (not yet part of the stream_wrapper interface)
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* you can always use the standard php functions, if you add a 'vfs://default' prefix
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* to every filename or path. Be sure to always add the prefix, as the user otherwise gains
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* access to the real filesystem of the server!
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*
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* The two following methods can be used to persitently mount further filesystems (without editing the code):
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*
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* - boolean/array egw_vfs::mount($url,$path) to mount $ur on $path or to return the fstab when called without argument
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* - boolean egw_vfs::umount($path) to unmount a path or url
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*
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* The stream wrapper interface allows to access hugh files in junks to not be limited by the
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* memory_limit setting of php. To do you should path a resource to the opened file and not the content:
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*
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* $file = egw_vfs::fopen('/home/user/somefile','r');
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* $content = fread($file,1024);
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*
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* You can also attach stream filters, to eg. base64 encode or compress it on the fly,
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* without the need to hold the content of the whole file in memmory.
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*
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* If you want to copy a file, you can use stream_copy_to_stream to do a copy of a file far bigger then
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* php's memory_limit:
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*
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* $from = egw_vfs::fopen('/home/user/fromfile','r');
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* $to = egw_vfs::fopen('/home/user/tofile','w');
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*
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* stream_copy_to_stream($from,$to);
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*
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* The static egw_vfs::copy() method does exactly that, but you have to do it eg. on your own, if
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* you want to copy eg. an uploaded file into the vfs.
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*/
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class egw_vfs extends vfs_stream_wrapper
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{
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const PREFIX = 'vfs://default';
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/**
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* Readable bit, for dirs traversable
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*/
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const READABLE = 4;
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/**
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* Writable bit, for dirs delete or create files in that dir
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*/
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const WRITABLE = 2;
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/**
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* Excecutable bit, here only use to check if user is allowed to search dirs
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*/
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const EXECUTABLE = 1;
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/**
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* Name of the lock table
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*/
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const LOCK_TABLE = 'egw_locks';
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/**
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* Current user has root rights, no access checks performed!
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*
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* @var boolean
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*/
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static $is_root = false;
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/**
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* Current user id, in case we ever change if away from $GLOBALS['egw_info']['user']['account_id']
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*
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* @var int
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*/
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static $user;
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/**
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* Current user is an eGW admin
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*
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* @var boolean
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*/
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static $is_admin = false;
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/**
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* Total of last find call
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*
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* @var int
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*/
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static $find_total;
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/**
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* Reference to the global db object
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*
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* @var egw_db
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*/
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static $db;
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/**
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* fopen working on just the eGW VFS
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*
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* @param string $path filename with absolute path in the eGW VFS
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* @param string $mode 'r', 'w', ... like fopen
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* @return resource
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*/
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static function fopen($path,$mode)
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{
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if ($path[0] != '/')
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{
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throw new egw_exception_assertion_failed("Filename '$path' is not an absolute path!");
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}
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return fopen(self::PREFIX.$path,$mode);
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}
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/**
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* opendir working on just the eGW VFS
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*
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* @param string $path filename with absolute path in the eGW VFS
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* @return resource
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*/
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static function opendir($path)
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{
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if ($path[0] != '/')
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{
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throw new egw_exception_assertion_failed("Directory '$path' is not an absolute path!");
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}
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return opendir(self::PREFIX.$path);
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}
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/**
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* copy working on just the eGW VFS
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*
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* @param string $from
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* @param string $to
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* @return boolean
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*/
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static function copy($from,$to)
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{
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$ret = false;
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if (($from_fp = self::fopen($from,'r')) &&
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($to_fp = self::fopen($to,'w')))
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{
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$ret = stream_copy_to_stream($from_fp,$to_fp) !== false;
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}
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if ($from_fp)
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{
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fclose($from_fp);
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}
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if ($to_fp)
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{
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fclose($to_fp);
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}
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return $ret;
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}
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/**
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* stat working on just the eGW VFS (alias of url_stat)
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*
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* @param string $path filename with absolute path in the eGW VFS
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* @param boolean $try_create_home=false should a non-existing home-directory be automatically created
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* @return array
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*/
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static function stat($path,$try_create_home=false)
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{
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if ($path[0] != '/')
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{
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throw new egw_exception_assertion_failed("File '$path' is not an absolute path!");
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}
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if (($stat = self::url_stat($path,0,$try_create_home)))
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{
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$stat = array_slice($stat,13); // remove numerical indices 0-12
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}
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return $stat;
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}
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/**
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* lstat (not resolving symbolic links) working on just the eGW VFS (alias of url_stat)
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*
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* @param string $path filename with absolute path in the eGW VFS
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* @param boolean $try_create_home=false should a non-existing home-directory be automatically created
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* @return array
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*/
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static function lstat($path,$try_create_home=false)
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{
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if ($path[0] != '/')
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{
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throw new egw_exception_assertion_failed("File '$path' is not an absolute path!");
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}
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if (($stat = self::url_stat($path,STREAM_URL_STAT_LINK,$try_create_home)))
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{
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$stat = array_slice($stat,13); // remove numerical indices 0-12
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}
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return $stat;
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}
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/**
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* is_dir() version working only inside the vfs
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*
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* @param string $path
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* @return boolean
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*/
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static function is_dir($path)
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{
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return $path[0] == '/' && is_dir(self::PREFIX.$path);
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}
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/**
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* is_link() version working only inside the vfs
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*
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* @param string $path
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* @return boolean
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*/
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static function is_link($path)
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{
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return $path[0] == '/' && is_link(self::PREFIX.$path);
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}
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/**
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* file_exists() version working only inside the vfs
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*
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* @param string $path
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* @return boolean
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*/
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static function file_exists($path)
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{
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return $path[0] == '/' && file_exists(self::PREFIX.$path);
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}
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/**
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* Mounts $url under $path in the vfs, called without parameter it returns the fstab
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*
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* The fstab is stored in the eGW configuration and used for all eGW users.
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*
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* @param string $url=null url of the filesystem to mount, eg. oldvfs://default/
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* @param string $path=null path to mount the filesystem in the vfs, eg. /
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* @return array/boolean array with fstab, if called without parameter or true on successful mount
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*/
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static function mount($url=null,$path=null)
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{
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if (is_null($url) || is_null($path))
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns '.array2string(self::$fstab));
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return self::$fstab;
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}
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if (!self::$is_root)
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{
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if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') permission denied, you are NOT root!');
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return false; // only root can mount
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}
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if (isset(self::$fstab[$path]) && self::$fstab[$path] === $url)
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{
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if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') already mounted.');
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return true; // already mounted
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}
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if (!file_exists($url) || opendir($url) === false)
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{
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if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') url does NOT exist!');
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return false; // url does not exist
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}
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self::$fstab[$path] = $url;
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uksort(self::$fstab,create_function('$a,$b','return strlen($a)-strlen($b);'));
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config::save_value('vfs_fstab',self::$fstab,'phpgwapi');
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$GLOBALS['egw_info']['server']['vfs_fstab'] = self::$fstab;
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if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns true (successful new mount).');
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return true;
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}
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/**
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* Unmounts a filesystem part of the vfs
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*
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* @param string $path url or path of the filesystem to unmount
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*/
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static function umount($path)
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{
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if (!self::$is_root)
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{
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if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') permission denied, you are NOT root!');
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return false; // only root can mount
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}
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if (!isset(self::$fstab[$path]) && ($path = array_search($path,self::$fstab)) === false)
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{
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if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') NOT mounted!');
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return false; // $path not mounted
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}
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unset(self::$fstab[$path]);
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config::save_value('vfs_fstab',self::$fstab,'phpgwapi');
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$GLOBALS['egw_info']['server']['vfs_fstab'] = self::$fstab;
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if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns true (successful unmount).');
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return true;
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}
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/**
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* find = recursive search over the filesystem
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*
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* @param string/array $base base of the search
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* @param array $options=null the following keys are allowed:
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* - type => {d|f} d=dirs, f=files, default both
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* - depth => {true|false(default)} put the contents of a dir before the dir itself
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* - dirsontop => {true(default)|false} allways return dirs before the files (two distinct blocks)
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* - mindepth,maxdepth minimal or maximal depth to be returned
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* - name,path => pattern with *,? wildcards, eg. "*.php"
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* - name_preg,path_preg => preg regular expresion, eg. "/(vfs|wrapper)/"
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* - uid,user,gid,group,nouser,nogroup file belongs to user/group with given name or (numerical) id
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* - mime => type[/subtype]
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* - empty,size => (+|-|)N
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* - cmin/mmin => (+|-|)N file/dir create/modified in the last N minutes
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* - ctime/mtime => (+|-|)N file/dir created/modified in the last N days
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* - url => false(default),true allow (and return) full URL's instead of VFS pathes (only set it, if you know what you doing securitywise!)
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* - need_mime => false(default),true should we return the mime type
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* - order => name order rows by name column
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* - sort => (ASC|DESC) sort, default ASC
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* - limit => N,[n=0] return N entries from position n on, which defaults to 0
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* - follow => {true|false(default)} follow symlinks
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* @param string/array/true $exec=null function to call with each found file/dir as first param and stat array as last param or
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* true to return file => stat pairs
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* @param array $exec_params=null further params for exec as array, path is always the first param and stat the last!
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* @return array of pathes if no $exec, otherwise path => stat pairs
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*/
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static function find($base,$options=null,$exec=null,$exec_params=null)
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{
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//error_log(__METHOD__."(".print_r($base,true).",".print_r($options,true).",".print_r($exec,true).",".print_r($exec_params,true).")\n");
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$type = $options['type']; // 'd' or 'f'
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$dirs_last = $options['depth']; // put content of dirs before the dir itself
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// show dirs on top by default, if no recursive listing (allways disabled if $type specified, as unnecessary)
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$dirsontop = !$type && (isset($options['dirsontop']) ? (boolean)$options['dirsontop'] : isset($options['maxdepth'])&&$options['maxdepth']>0);
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// process some of the options (need to be done only once)
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if (isset($options['name']) && !isset($options['name_preg'])) // change from simple *,? wildcards to preg regular expression once
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{
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$options['name_preg'] = '/^'.str_replace(array('\\?','\\*'),array('.{1}','.*'),preg_quote($options['name'])).'$/i';
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}
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if (isset($options['path']) && !isset($options['preg_path'])) // change from simple *,? wildcards to preg regular expression once
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{
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$options['path_preg'] = '/^'.str_replace(array('\\?','\\*'),array('.{1}','.*'),preg_quote($options['path'])).'$/i';
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}
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if (!isset($options['uid']))
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{
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if (isset($options['user']))
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{
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$options['uid'] = $GLOBALS['egw']->accounts->name2id($options['user'],'account_lid','u');
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}
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elseif (isset($options['nouser']))
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{
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$options['uid'] = 0;
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}
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}
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if (!isset($options['gid']))
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{
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if (isset($options['group']))
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{
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$options['gid'] = abs($GLOBALS['egw']->accounts->name2id($options['group'],'account_lid','g'));
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}
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elseif (isset($options['nogroup']))
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{
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$options['gid'] = 0;
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}
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}
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if ($options['order'] == 'mime')
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{
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$options['need_mime'] = true; // we need to return the mime colum
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}
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$url = $options['url'];
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if (!is_array($base))
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{
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$base = array($base);
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}
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$result = array();
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foreach($base as $path)
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{
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if (!$url) $path = egw_vfs::PREFIX . $path;
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$is_dir = is_dir($path) && ($options['follow'] || !is_link($path));
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if (!isset($options['remove']))
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{
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$options['remove'] = count($base) == 1 ? count(explode('/',$path))-3+(int)(substr($path,-1)!='/') : 0;
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}
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if ((int)$options['mindepth'] == 0 && (!$dirs_last || !$is_dir))
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{
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self::_check_add($options,$path,$result);
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}
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if ($is_dir && (!isset($options['maxdepth']) || $options['maxdepth'] > 0) && ($dir = @opendir($path)))
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{
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while(($file = readdir($dir)) !== false)
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{
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if ($file == '.' || $file == '..') continue; // ignore current and parent dir!
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$file = self::concat($path,$file);
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if ((int)$options['mindepth'] <= 1)
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{
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self::_check_add($options,$file,$result);
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}
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if (is_dir($file) && (!isset($options['maxdepth']) || $options['maxdepth'] > 1))
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{
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$opts = $options;
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if ($opts['mindepth']) $opts['mindepth']--;
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if ($opts['maxdepth']) $opts['maxdepth']++;
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unset($opts['order']);
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unset($opts['limit']);
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foreach(self::find($options['url']?$file:parse_url($file,PHP_URL_PATH),$opts,true) as $p => $s)
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{
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unset($result[$p]);
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$result[$p] = $s;
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}
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}
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}
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closedir($dir);
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}
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if ($is_dir && (int)$options['mindepth'] == 0 && $dirs_last)
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{
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self::_check_add($options,$path,$result);
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}
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}
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// sort code, to place directories before files, if $dirsontop enabled
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$dirsfirst = $dirsontop ? '($a[mime]==\''.self::DIR_MIME_TYPE.'\')!==($b[mime]==\''.self::DIR_MIME_TYPE.'\')?'.
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'($a[mime]==\''.self::DIR_MIME_TYPE.'\'?-1:1):' : '';
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// ordering of the rows
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if (isset($options['order']))
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{
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$sort = strtolower($options['sort']) == 'desc' ? '-' : '';
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switch($options['order'])
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{
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// sort numerical
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case 'size':
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case 'uid':
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case 'gid':
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case 'mode':
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case 'ctime':
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case 'mtime':
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uasort($result,create_function('$a,$b',$c='return '.$dirsfirst.$sort.'($a[\''.$options['order'].'\']-$b[\''.$options['order'].'\']);'));
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break;
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// sort alphanumerical
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default:
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$options['order'] = 'name';
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// fall throught
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case 'name':
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case 'mime':
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uasort($result,create_function('$a,$b',$c='return '.$dirsfirst.$sort.'strcasecmp($a[\''.$options['order'].'\'],$b[\''.$options['order'].'\']);'));
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break;
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}
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//echo "order='$options[order]', sort='$options[sort]' --> '$c'<br>\n";
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}
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// limit resultset
|
|
self::$find_total = count($result);
|
|
if (isset($options['limit']))
|
|
{
|
|
list($limit,$start) = explode(',',$options['limit']);
|
|
if (!$limit && !($limit = $GLOBALS['egw_info']['user']['preferences']['comman']['maxmatches'])) $limit = 15;
|
|
//echo "total=".egw_vfs::$find_total.", limit=$options[limit] --> start=$start, limit=$limit<br>\n";
|
|
|
|
if ((int)$start || self::$find_total > $limit)
|
|
{
|
|
$result = array_slice($result,(int)$start,(int)$limit,true);
|
|
}
|
|
}
|
|
//echo $path; _debug_array($result);
|
|
if ($exec !== true && is_callable($exec))
|
|
{
|
|
if (!is_array($exec_params))
|
|
{
|
|
$exec_params = is_null($exec_params) ? array() : array($exec_params);
|
|
}
|
|
foreach($result as $path => &$stat)
|
|
{
|
|
$options = $exec_params;
|
|
array_unshift($options,$path);
|
|
array_push($options,$stat);
|
|
//echo "calling ".print_r($exec,true).print_r($options,true)."\n";
|
|
$stat = call_user_func_array($exec,$options);
|
|
}
|
|
return $result;
|
|
}
|
|
//error_log("egw_vfs::find($path)=".print_r(array_keys($result),true));
|
|
if ($exec !== true)
|
|
{
|
|
return array_keys($result);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Function carying out the various (optional) checks, before files&dirs get returned as result of find
|
|
*
|
|
* @param array $options options, see egw_vfs::find(,$options)
|
|
* @param string $path name of path to add
|
|
* @param array &$result here we add the stat for the key $path, if the checks are successful
|
|
*/
|
|
private static function _check_add($options,$path,&$result)
|
|
{
|
|
$type = $options['type']; // 'd' or 'f'
|
|
|
|
if ($type && ($type == 'd') !== is_dir($path))
|
|
{
|
|
return; // wrong type
|
|
}
|
|
if (!($stat = self::url_stat($path,0)))
|
|
{
|
|
return; // not found, should not happen
|
|
}
|
|
$stat = array_slice($stat,13); // remove numerical indices 0-12
|
|
$stat['path'] = parse_url($path,PHP_URL_PATH);
|
|
$stat['name'] = $options['remove'] > 0 ? implode('/',array_slice(explode('/',$stat['path']),$options['remove'])) : self::basename($path);
|
|
|
|
if ($options['mime'] || $options['need_mime'])
|
|
{
|
|
$stat['mime'] = self::mime_content_type($path);
|
|
}
|
|
|
|
if (isset($options['name_preg']) && !preg_match($options['name_preg'],$stat['name']) ||
|
|
isset($options['path_preg']) && !preg_match($options['path_preg'],$path))
|
|
{
|
|
return; // wrong name or path
|
|
}
|
|
if (isset($options['gid']) && $stat['gid'] != $options['gid'] ||
|
|
isset($options['uid']) && $stat['uid'] != $options['uid'])
|
|
{
|
|
return; // wrong user or group
|
|
}
|
|
if (isset($options['mime']) && $options['mime'] != $stat['mime'])
|
|
{
|
|
list($type,$subtype) = explode('/',$options['mime']);
|
|
// no subtype (eg. 'image') --> check only the main type
|
|
if ($sub_type || substr($mime,0,strlen($type)+1) != $type.'/')
|
|
{
|
|
return; // wrong mime-type
|
|
}
|
|
}
|
|
if (isset($options['size']) && !self::_check_num($stat['size'],$options['size']) ||
|
|
(isset($options['empty']) && !!$options['empty'] !== !$stat['size']))
|
|
{
|
|
return; // wrong size
|
|
}
|
|
if (isset($options['cmin']) && !self::_check_num(round((time()-$stat['ctime'])/60),$options['cmin']) ||
|
|
isset($options['mmin']) && !self::_check_num(round((time()-$stat['mtime'])/60),$options['mmin']) ||
|
|
isset($options['ctime']) && !self::_check_num(round((time()-$stat['ctime'])/86400),$options['ctime']) ||
|
|
isset($options['mtime']) && !self::_check_num(round((time()-$stat['ctime'])/86400),$options['mtime']))
|
|
{
|
|
return; // not create/modified in the spezified time
|
|
}
|
|
// do we return url or just vfs pathes
|
|
if (!$options['url'])
|
|
{
|
|
$path = parse_url($path,PHP_URL_PATH);
|
|
}
|
|
$result[$path] = $stat;
|
|
}
|
|
|
|
private static function _check_num($value,$argument)
|
|
{
|
|
if (is_int($argument) && $argument >= 0 || $argument[0] != '-' && $argument[0] != '+')
|
|
{
|
|
//echo "_check_num($value,$argument) check = == ".(int)($value == $argument)."\n";
|
|
return $value == $argument;
|
|
}
|
|
if ($argument < 0)
|
|
{
|
|
//echo "_check_num($value,$argument) check < == ".(int)($value < abs($argument))."\n";
|
|
return $value < abs($argument);
|
|
}
|
|
//echo "_check_num($value,$argument) check > == ".(int)($value > (int)substr($argument,1))."\n";
|
|
return $value > (int) substr($argument,1);
|
|
}
|
|
|
|
/**
|
|
* Recursiv remove all given url's, including it's content if they are files
|
|
*
|
|
* @param string/array $urls url or array of url's
|
|
* @param boolean $allow_urls=false allow to use url's, default no only pathes (to stay within the vfs)
|
|
* @return array
|
|
*/
|
|
static function remove($urls,$allow_urls=false)
|
|
{
|
|
//error_log(__METHOD__.'('.print_r($urls).')');
|
|
return self::find($urls,array('depth'=>true,'url'=>$allow_urls),array(__CLASS__,'_rm_rmdir'));
|
|
}
|
|
|
|
/**
|
|
* Helper function for remove: either rmdir or unlink given url (depending if it's a dir or file)
|
|
*
|
|
* @param string $url
|
|
* @return boolean
|
|
*/
|
|
static function _rm_rmdir($url)
|
|
{
|
|
if ($url[0] == '/')
|
|
{
|
|
$url = self::PREFIX . $url;
|
|
}
|
|
if (is_dir($url) && !is_link($url))
|
|
{
|
|
return rmdir($url);
|
|
}
|
|
return unlink($url);
|
|
}
|
|
|
|
/**
|
|
* The stream_wrapper interface checks is_{readable|writable|executable} against the webservers uid,
|
|
* which is wrong in case of our vfs, as we use the current users id and memberships
|
|
*
|
|
* @param string $path
|
|
* @param int $check=4 mode to check: 4 = read, 2 = write, 1 = executable
|
|
* @return boolean
|
|
*/
|
|
static function is_readable($path,$check = 4)
|
|
{
|
|
return self::check_access($path,$check);
|
|
}
|
|
|
|
/**
|
|
* The stream_wrapper interface checks is_{readable|writable|executable} against the webservers uid,
|
|
* which is wrong in case of our vfs, as we use the current users id and memberships
|
|
*
|
|
* @param array/string $path stat array or path
|
|
* @param int $check mode to check: one or more or'ed together of: 4 = read, 2 = write, 1 = executable
|
|
* @param array $stat=null stat array, to not query it again
|
|
* @return boolean
|
|
*/
|
|
static function check_access($path,$check,$stat=null)
|
|
{
|
|
if (self::$is_root)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// throw exception if stat array is used insead of path, can be removed soon
|
|
if (is_array($path))
|
|
{
|
|
throw new egw_exception_wrong_parameter('path has to be string, use check_acces($path,$check,$stat=null)!');
|
|
}
|
|
// query stat array, if not given
|
|
if (is_null($stat))
|
|
{
|
|
$stat = self::url_stat($path,0);
|
|
}
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check)");
|
|
|
|
if (!$stat)
|
|
{
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check) no stat array!");
|
|
return false; // file not found
|
|
}
|
|
// check if other rights grant access
|
|
if (($stat['mode'] & $check) == $check)
|
|
{
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check) access via other rights!");
|
|
return true;
|
|
}
|
|
// check if there's owner access and we are the owner
|
|
if (($stat['mode'] & ($check << 6)) == ($check << 6) && $stat['uid'] && $stat['uid'] == self::$user)
|
|
{
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check) access via owner rights!");
|
|
return true;
|
|
}
|
|
// check if there's a group access and we have the right membership
|
|
if (($stat['mode'] & ($check << 3)) == ($check << 3) && $stat['gid'])
|
|
{
|
|
static $memberships;
|
|
if (is_null($memberships))
|
|
{
|
|
$memberships = $GLOBALS['egw']->accounts->memberships(self::$user,true);
|
|
}
|
|
if (in_array(-abs($stat['gid']),$memberships))
|
|
{
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check) access via group rights!");
|
|
return true;
|
|
}
|
|
}
|
|
// check backend for extended acls (only if path given)
|
|
$ret = $path && self::_call_on_backend('check_extended_acl',array(isset($stat['url'])?$stat['url']:$path,$check),true); // true = fail silent if backend does not support
|
|
|
|
//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check) ".($ret ? 'backend extended acl granted access.' : 'no access!!!'));
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* The stream_wrapper interface checks is_{readable|writable|executable} against the webservers uid,
|
|
* which is wrong in case of our vfs, as we use the current users id and memberships
|
|
*
|
|
* @param string $path
|
|
* @return boolean
|
|
*/
|
|
static function is_writable($path)
|
|
{
|
|
return self::is_readable($path,2);
|
|
}
|
|
|
|
/**
|
|
* The stream_wrapper interface checks is_{readable|writable|executable} against the webservers uid,
|
|
* which is wrong in case of our vfs, as we use the current users id and memberships
|
|
*
|
|
* @param string $path
|
|
* @return boolean
|
|
*/
|
|
static function is_executable($path)
|
|
{
|
|
return self::is_readable($path,1);
|
|
}
|
|
|
|
/**
|
|
* Check if path is a script and write access would be denied by backend
|
|
*
|
|
* @param string $path
|
|
* @return boolean true if $path is a script AND exec mount-option is NOT set, false otherwise
|
|
*/
|
|
static function deny_script($path)
|
|
{
|
|
return self::_call_on_backend('deny_script',array($path),true);
|
|
}
|
|
|
|
/**
|
|
* Set or delete extended acl for a given path and owner (or delete them if is_null($rights)
|
|
*
|
|
* Does NOT check if user has the rights to set the extended acl for the given url/path!
|
|
*
|
|
* @param string $path string with path
|
|
* @param int $rights=null rights to set, or null to delete the entry
|
|
* @param int/boolean $owner=null owner for whom to set the rights, null for the current user, or false to delete all rights for $path
|
|
* @return boolean true if acl is set/deleted, false on error
|
|
*/
|
|
static function eacl($url,$rights=null,$owner=null)
|
|
{
|
|
return self::_call_on_backend('eacl',array($url,$rights,$owner));
|
|
}
|
|
|
|
/**
|
|
* Get all ext. ACL set for a path
|
|
*
|
|
* Calls itself recursive, to get the parent directories
|
|
*
|
|
* @param string $path
|
|
* @return array/boolean array with array('path'=>$path,'owner'=>$owner,'rights'=>$rights) or false if $path not found
|
|
*/
|
|
static function get_eacl($path)
|
|
{
|
|
return self::_call_on_backend('get_eacl',array($path),true); // true = fail silent (no PHP Warning)
|
|
}
|
|
|
|
/**
|
|
* Store properties for a single ressource (file or dir)
|
|
*
|
|
* @param string $path string with path
|
|
* @param array $props array or array with values for keys 'name', 'ns', 'val' (null to delete the prop)
|
|
* @return boolean true if props are updated, false otherwise (eg. ressource not found)
|
|
*/
|
|
static function proppatch($path,array $props)
|
|
{
|
|
return self::_call_on_backend('proppatch',array($path,$props));
|
|
}
|
|
|
|
/**
|
|
* Default namespace for properties set by eGroupware: comment or custom fields (leading #)
|
|
*
|
|
*/
|
|
const DEFAULT_PROP_NAMESPACE = 'http://egroupware.org/';
|
|
|
|
/**
|
|
* Read properties for a ressource (file, dir or all files of a dir)
|
|
*
|
|
* @param array|string $path (array of) string with path
|
|
* @param string $ns='http://egroupware.org/' namespace if propfind should be limited to a single one, otherwise use null
|
|
* @return array|boolean array with props (values for keys 'name', 'ns', 'val'), or path => array of props for is_array($path)
|
|
* false if $path does not exist
|
|
*/
|
|
static function propfind($path,$ns=self::DEFAULT_PROP_NAMESPACE)
|
|
{
|
|
return self::_call_on_backend('propfind',array($path,$ns),true); // true = fail silent (no PHP Warning)
|
|
}
|
|
|
|
/**
|
|
* Private constructor to prevent instanciating this class, only it's static methods should be used
|
|
*/
|
|
private function __construct()
|
|
{
|
|
|
|
}
|
|
|
|
/**
|
|
* Convert a symbolic mode string or octal mode to an integer
|
|
*
|
|
* @param string/int $set comma separated mode string to set [ugo]+[+=-]+[rwx]+
|
|
* @param int $mode=0 current mode of the file, necessary for +/- operation
|
|
* @return int
|
|
*/
|
|
static function mode2int($set,$mode=0)
|
|
{
|
|
if (is_int($set)) // already an integer
|
|
{
|
|
return $set;
|
|
}
|
|
if (is_numeric($set)) // octal string
|
|
{
|
|
//error_log(__METHOD__."($set,$mode) returning ".(int)base_convert($set,8,10));
|
|
return (int)base_convert($set,8,10); // convert octal to decimal
|
|
}
|
|
foreach(explode(',',$set) as $s)
|
|
{
|
|
if (!preg_match($use='/^([ugoa]*)([+=-]+)([rwx]+)$/',$s,$matches))
|
|
{
|
|
$use = str_replace(array('/','^','$','(',')'),'',$use);
|
|
throw new egw_exception_wrong_userinput("$s is not an allowed mode, use $use !");
|
|
}
|
|
$base = (strpos($matches[3],'r') !== false ? self::READABLE : 0) |
|
|
(strpos($matches[3],'w') !== false ? self::WRITABLE : 0) |
|
|
(strpos($matches[3],'x') !== false ? self::EXECUTABLE : 0);
|
|
|
|
for($n = $m = 0; $n < strlen($matches[1]); $n++)
|
|
{
|
|
switch($matches[1][$n])
|
|
{
|
|
case 'o':
|
|
$m |= $base;
|
|
break;
|
|
case 'g':
|
|
$m |= $base << 3;
|
|
break;
|
|
case 'u':
|
|
$m |= $base << 6;
|
|
break;
|
|
default:
|
|
case 'a':
|
|
$m = $base | ($base << 3) | ($base << 6);
|
|
}
|
|
}
|
|
switch($matches[2])
|
|
{
|
|
case '+':
|
|
$mode |= $m;
|
|
break;
|
|
case '=':
|
|
$mode = $m;
|
|
break;
|
|
case '-':
|
|
$mode &= ~$m;
|
|
}
|
|
}
|
|
//error_log(__METHOD__."($set,) returning ".sprintf('%o',$mode));
|
|
return $mode;
|
|
}
|
|
|
|
/**
|
|
* Convert a numerical mode to a symbolic mode-string
|
|
*
|
|
* @param int $mode
|
|
* @return string
|
|
*/
|
|
static function int2mode( $mode )
|
|
{
|
|
if(($mode & self::MODE_LINK) == self::MODE_LINK) // Symbolic Link
|
|
{
|
|
$sP = 'l';
|
|
}
|
|
elseif(($mode & 0xC000) == 0xC000) // Socket
|
|
{
|
|
$sP = 's';
|
|
}
|
|
elseif($mode & 0x1000) // FIFO pipe
|
|
{
|
|
$sP = 'p';
|
|
}
|
|
elseif($mode & 0x2000) // Character special
|
|
{
|
|
$sP = 'c';
|
|
}
|
|
elseif($mode & 0x4000) // Directory
|
|
{
|
|
$sP = 'd';
|
|
}
|
|
elseif($mode & 0x6000) // Block special
|
|
{
|
|
$sP = 'b';
|
|
}
|
|
elseif($mode & 0x8000) // Regular
|
|
{
|
|
$sP = '-';
|
|
}
|
|
else // UNKNOWN
|
|
{
|
|
$sP = 'u';
|
|
}
|
|
|
|
// owner
|
|
$sP .= (($mode & 0x0100) ? 'r' : '-') .
|
|
(($mode & 0x0080) ? 'w' : '-') .
|
|
(($mode & 0x0040) ? (($mode & 0x0800) ? 's' : 'x' ) :
|
|
(($mode & 0x0800) ? 'S' : '-'));
|
|
|
|
// group
|
|
$sP .= (($mode & 0x0020) ? 'r' : '-') .
|
|
(($mode & 0x0010) ? 'w' : '-') .
|
|
(($mode & 0x0008) ? (($mode & 0x0400) ? 's' : 'x' ) :
|
|
(($mode & 0x0400) ? 'S' : '-'));
|
|
|
|
// world
|
|
$sP .= (($mode & 0x0004) ? 'r' : '-') .
|
|
(($mode & 0x0002) ? 'w' : '-') .
|
|
(($mode & 0x0001) ? (($mode & 0x0200) ? 't' : 'x' ) :
|
|
(($mode & 0x0200) ? 'T' : '-'));
|
|
|
|
return $sP;
|
|
}
|
|
|
|
/**
|
|
* Get the closest mime icon
|
|
*
|
|
* @param string $mime_type
|
|
* @param boolean $et_image=true return $app/$icon string for etemplate (default) or html img tag if false
|
|
* @param int $size=16
|
|
* @return string
|
|
*/
|
|
static function mime_icon($mime_type, $et_image=true, $size=16)
|
|
{
|
|
if ($mime_type == egw_vfs::DIR_MIME_TYPE)
|
|
{
|
|
$mime_type = 'Directory';
|
|
}
|
|
if(!$mime_type)
|
|
{
|
|
$mime_type = 'unknown';
|
|
}
|
|
$mime_full = strtolower(str_replace ('/','_',$mime_type));
|
|
list($mime_part) = explode('_',$mime_full);
|
|
|
|
if (!($img=$GLOBALS['egw']->common->image('etemplate',$icon='mime'.$size.'_'.$mime_full)) &&
|
|
!($img=$GLOBALS['egw']->common->image('etemplate',$icon='mime'.$size.'_'.$mime_part)))
|
|
{
|
|
$img = $GLOBALS['egw']->common->image('etemplate',$icon='mime'.$size.'_unknown');
|
|
}
|
|
if ($et_image)
|
|
{
|
|
return 'etemplate/'.$icon;
|
|
}
|
|
return html::image('etemplate',$icon,mime_magic::mime2label($mime_type));
|
|
}
|
|
|
|
/**
|
|
* Human readable size values in k or M
|
|
*
|
|
* @param int $size
|
|
* @return string
|
|
*/
|
|
static function hsize($size)
|
|
{
|
|
if ($size < 1024) return $size;
|
|
if ($size < 1024*1024) return sprintf('%3.1lfk',(float)$size/1024);
|
|
return sprintf('%3.1lfM',(float)$size/(1024*1024));
|
|
}
|
|
|
|
/**
|
|
* like basename($path), but also working if the 1. char of the basename is non-ascii
|
|
*
|
|
* @param string $path
|
|
* @return string
|
|
*/
|
|
static function basename($path)
|
|
{
|
|
$parts = explode('/',$path);
|
|
|
|
return array_pop($parts);
|
|
}
|
|
|
|
/**
|
|
* Get the directory / parent of a given path or url(!), return false for '/'!
|
|
*
|
|
* @param string $path path or url
|
|
* @return string/boolean parent or false if there's none ($path == '/')
|
|
*/
|
|
static function dirname($url)
|
|
{
|
|
if ($url == '/' || $url[0] != '/' && parse_url($url,PHP_URL_PATH) == '/')
|
|
{
|
|
//error_log(__METHOD__."($url) returning FALSE: already in root!");
|
|
return false;
|
|
}
|
|
$parts = explode('/',$url);
|
|
if (substr($url,-1) == '/') array_pop($parts);
|
|
array_pop($parts);
|
|
if ($url[0] != '/' && count($parts) == 3 || count($parts) == 1 && $parts[0] === '')
|
|
{
|
|
array_push($parts,''); // scheme://host is wrong (no path), has to be scheme://host/
|
|
}
|
|
list(,$query) = explode('?',$url,2);
|
|
//error_log(__METHOD__."($url)=".implode('/',$parts).($query ? '?'.$query : ''));
|
|
return implode('/',$parts).($query ? '?'.$query : '');
|
|
}
|
|
|
|
/**
|
|
* Check if the current use has owner rights for the given path or stat
|
|
*
|
|
* We define all eGW admins the owner of the group directories!
|
|
*
|
|
* @param string $path
|
|
* @param array $stat=null stat for path, default queried by this function
|
|
* @return boolean
|
|
*/
|
|
static function has_owner_rights($path,array $stat=null)
|
|
{
|
|
if (!$stat) $stat = self::url_stat($path,0);
|
|
|
|
return $stat['uid'] == self::$user || // user is the owner
|
|
self::$is_root || // class runs with root rights
|
|
!$stat['uid'] && $stat['gid'] && self::$is_admin; // group directory and user is an eGW admin
|
|
}
|
|
|
|
/**
|
|
* Concat a relative path to an url, taking into account, that the url might already end with a slash or the path starts with one or is empty
|
|
*
|
|
* Also normalizing the path, as the relative path can contain ../
|
|
*
|
|
* @param string $url base url or path, might end in a /
|
|
* @param string $relative relative path to add to $url
|
|
* @return string
|
|
*/
|
|
static function concat($url,$relative)
|
|
{
|
|
list($url,$query) = explode('?',$url,2);
|
|
if (substr($url,-1) == '/') $url = substr($url,0,-1);
|
|
$url = ($relative === '' || $relative[0] == '/' ? $url.$relative : $url.'/'.$relative);
|
|
|
|
// now normalize the path (remove "/something/..")
|
|
while (strpos($url,'/../') !== false)
|
|
{
|
|
list($a,$b) = explode('/../',$url,2);
|
|
$a = explode('/',$a);
|
|
array_pop($a);
|
|
$b = explode('/',$b);
|
|
$url = implode('/',array_merge($a,$b));
|
|
}
|
|
return $url.($query ? (strpos($url,'?')===false ? '?' : '&').$query : '');
|
|
}
|
|
|
|
/**
|
|
* Build an url from it's components (reverse of parse_url)
|
|
*
|
|
* @param array $url_parts values for keys 'scheme', 'host', 'user', 'pass', 'query', 'fragment' (all but 'path' are optional)
|
|
* @return string
|
|
*/
|
|
static function build_url(array $url_parts)
|
|
{
|
|
$url = (!isset($url_parts['scheme'])?'':$url_parts['scheme'].'://'.
|
|
(!isset($url_parts['user'])?'':$url_parts['user'].(!isset($url_parts['pass'])?'':':'.$url_parts['pass']).'@').
|
|
$url_parts['host']).$url_parts['path'].
|
|
(!isset($url_parts['query'])?'':'?'.$url_parts['query']).
|
|
(!isset($url_parts['fragment'])?'':'?'.$url_parts['fragment']);
|
|
//error_log(__METHOD__.'('.array2string($url_parts).") = '".$url."'");
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* URL to download a file
|
|
*
|
|
* We use our webdav handler as download url instead of an own download method.
|
|
* The webdav hander (filemanager/webdav.php) recognices eGW's session cookie and of cause understands regular GET requests.
|
|
*
|
|
* Please note: If you dont use eTemplate or the html class, you have to run this url throught egw::link() to get a full url
|
|
*
|
|
* @param string $path
|
|
* @param boolean $force_download=false add header('Content-disposition: filename="' . basename($path) . '"'), currently not supported!
|
|
* @todo get $force_download working through webdav
|
|
* @return string
|
|
*/
|
|
static function download_url($path,$force_download=false)
|
|
{
|
|
if ($path[0] != '/')
|
|
{
|
|
$path = parse_url($path,PHP_URL_PATH);
|
|
}
|
|
return '/webdav.php'.strtr($path,array('%' => '%25','+' => '%2B',' ' => '%20'));
|
|
}
|
|
|
|
/**
|
|
* We cache locks within a request, as HTTP_WebDAV_Server generates so many, that it can be a bottleneck
|
|
*
|
|
* @var array
|
|
*/
|
|
static protected $lock_cache;
|
|
|
|
/**
|
|
* lock a ressource/path
|
|
*
|
|
* @param string $path path or url
|
|
* @param string &$token
|
|
* @param int &$timeout
|
|
* @param string &$owner
|
|
* @param string &$scope
|
|
* @param string &$type
|
|
* @param boolean $update=false
|
|
* @param boolean $check_writable=true should we check if the ressource is writable, before granting locks, default yes
|
|
* @return boolean true on success
|
|
*/
|
|
static function lock($path,&$token,&$timeout,&$owner,&$scope,&$type,$update=false,$check_writable=true)
|
|
{
|
|
// we require write rights to lock/unlock a resource
|
|
if (!$path || $update && !$token || $check_writable && !egw_vfs::is_writable($path))
|
|
{
|
|
return false;
|
|
}
|
|
// remove the lock info evtl. set in the cache
|
|
unset(self::$lock_cache[$path]);
|
|
|
|
if ($timeout < 1000000) // < 1000000 is a relative timestamp, so we add the current time
|
|
{
|
|
$timeout += time();
|
|
}
|
|
|
|
if ($update) // Lock Update
|
|
{
|
|
if (($ret = (boolean)($row = self::$db->select(self::LOCK_TABLE,array('lock_owner','lock_exclusive','lock_write'),array(
|
|
'lock_path' => $path,
|
|
'lock_token' => $token,
|
|
)))))
|
|
{
|
|
$owner = $row['lock_owner'];
|
|
$scope = egw_db::from_bool($row['lock_exclusive']) ? 'exclusive' : 'shared';
|
|
$type = egw_db::from_bool($row['lock_write']) ? 'write' : 'read';
|
|
|
|
self::$db->update(self::LOCK_TABLE,array(
|
|
'lock_expires' => $timeout,
|
|
'lock_modified' => time(),
|
|
),array(
|
|
'path' => $path,
|
|
'token' => $token,
|
|
),__LINE__,__FILE__);
|
|
}
|
|
}
|
|
// HTTP_WebDAV_Server does this check before calling LOCK, but we want to be complete and usable outside WebDAV
|
|
elseif(($lock = self::checkLock($path)) && ($lock['scope'] == 'exclusive' || $scope == 'exclusive'))
|
|
{
|
|
$ret = false; // there's alread a lock
|
|
}
|
|
else
|
|
{
|
|
// HTTP_WebDAV_Server sets owner and token, but we want to be complete and usable outside WebDAV
|
|
if (!$owner || $owner == 'unknown')
|
|
{
|
|
$owner = 'mailto:'.$GLOBALS['egw_info']['user']['account_email'];
|
|
}
|
|
if (!$token)
|
|
{
|
|
require_once('HTTP/WebDAV/Server.php');
|
|
$token = HTTP_WebDAV_Server::_new_locktoken();
|
|
}
|
|
try {
|
|
self::$db->insert(self::LOCK_TABLE,array(
|
|
'lock_token' => $token,
|
|
'lock_path' => $path,
|
|
'lock_created' => time(),
|
|
'lock_modified' => time(),
|
|
'lock_owner' => $owner,
|
|
'lock_expires' => $timeout,
|
|
'lock_exclusive' => $scope == 'exclusive',
|
|
'lock_write' => $type == 'write',
|
|
),false,__LINE__,__FILE__);
|
|
$ret = true;
|
|
}
|
|
catch(egw_exception_db $e) {
|
|
$ret = false; // there's already a lock
|
|
}
|
|
}
|
|
//error_log(__METHOD__."($path,$token,$timeout,$owner,$scope,$type,$update,$check_writable) returns ".($ret ? 'true' : 'false'));
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* unlock a ressource/path
|
|
*
|
|
* @param string $path path to unlock
|
|
* @param string $token locktoken
|
|
* @param boolean $check_writable=true should we check if the ressource is writable, before granting locks, default yes
|
|
* @return boolean true on success
|
|
*/
|
|
static function unlock($path,$token,$check_writable=true)
|
|
{
|
|
// we require write rights to lock/unlock a resource
|
|
if ($check_writable && !egw_vfs::is_writable($path))
|
|
{
|
|
return false;
|
|
}
|
|
if (($ret = self::$db->delete(self::LOCK_TABLE,array(
|
|
'lock_path' => $path,
|
|
'lock_token' => $token,
|
|
),__LINE__,__FILE__) && self::$db->affected_rows()))
|
|
{
|
|
// remove the lock from the cache too
|
|
unset(self::$lock_cache[$path]);
|
|
}
|
|
//error_log(__METHOD__."($path,$token,$check_writable) returns ".($ret ? 'true' : 'false'));
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* checkLock() helper
|
|
*
|
|
* @param string resource path to check for locks
|
|
* @return array|boolean false if there's no lock, else array with lock info
|
|
*/
|
|
static function checkLock($path)
|
|
{
|
|
if (isset(self::$lock_cache[$path]))
|
|
{
|
|
//error_log(__METHOD__."($path) returns from CACHE ".str_replace(array("\n",' '),'',print_r(self::$lock_cache[$path],true)));
|
|
return self::$lock_cache[$path];
|
|
}
|
|
$where = 'lock_path='.self::$db->quote($path);
|
|
// ToDo: additional check parent dirs for locks and children of the requested directory
|
|
//$where .= ' OR '.self::$db->quote($path).' LIKE '.self::$db->concat('lock_path',"'%'").' OR lock_path LIKE '.self::$db->quote($path.'%');
|
|
// ToDo: shared locks can return multiple rows
|
|
if (($result = self::$db->select(self::LOCK_TABLE,'*',$where,__LINE__,__FILE__)->fetch()))
|
|
{
|
|
$result = egw_db::strip_array_keys($result,'lock_');
|
|
$result['type'] = egw_db::from_bool($result['write']) ? 'write' : 'read';
|
|
$result['scope'] = egw_db::from_bool($result['exclusive']) ? 'exclusive' : 'shared';
|
|
$result['depth'] = egw_db::from_bool($result['recursive']) ? 'infinite' : 0;
|
|
}
|
|
if ($result && $result['expires'] < time()) // lock is expired --> remove it
|
|
{
|
|
self::$db->delete(self::LOCK_TABLE,array(
|
|
'lock_path' => $result['path'],
|
|
'lock_token' => $result['token'],
|
|
),__LINE__,__FILE__);
|
|
|
|
//error_log(__METHOD__."($path) lock is expired at ".date('Y-m-d H:i:s',$result['expires'])." --> removed");
|
|
$result = false;
|
|
}
|
|
//error_log(__METHOD__."($path) returns ".($result?array2string($result):'false'));
|
|
return self::$lock_cache[$path] = $result;
|
|
}
|
|
|
|
/**
|
|
* Mapps entries of applications to a path for the locking
|
|
*
|
|
* @param string $app
|
|
* @param int|string $id
|
|
* @return string
|
|
*/
|
|
static function app_entry_lock_path($app,$id)
|
|
{
|
|
return "/apps/$app/entry/$id";
|
|
}
|
|
|
|
/**
|
|
* Initialise our static vars
|
|
*/
|
|
static function init_static()
|
|
{
|
|
self::$user = (int) $GLOBALS['egw_info']['user']['account_id'];
|
|
self::$is_admin = isset($GLOBALS['egw_info']['user']['apps']['admin']);
|
|
self::$db = isset($GLOBALS['egw_setup']->db) ? $GLOBALS['egw_setup']->db : $GLOBALS['egw']->db;
|
|
self::$lock_cache = array();
|
|
}
|
|
}
|
|
|
|
egw_vfs::init_static();
|