* @copyright (c) 2008-10 by Ralf Becker * @version $Id$ */ /** * Class containing static methods to use the new eGW virtual file system * * This extension of the vfs stream-wrapper allows to use the following static functions, * which only allow access to the eGW VFS and need no 'vfs://default' prefix for filenames: * * - resource egw_vfs::fopen($path,$mode) like fopen, returned resource can be used with fwrite etc. * - resource egw_vfs::opendir($path) like opendir, returned resource can be used with readdir etc. * - boolean egw_vfs::copy($from,$to) like copy * - boolean egw_vfs::rename($old,$new) renaming or moving a file in the vfs * - boolean egw_vfs::mkdir($path) creating a new dir in the vfs * - boolean egw_vfs::rmdir($path) removing (an empty) directory * - boolean egw_vfs::unlink($path) removing a file * - boolean egw_vfs::touch($path,$mtime=null) touch a file * - boolean egw_vfs::stat($path) returning status of file like stat(), but only with string keys (no numerical indexes)! * * With the exception of egw_vfs::touch() (not yet part of the stream_wrapper interface) * you can always use the standard php functions, if you add a 'vfs://default' prefix * to every filename or path. Be sure to always add the prefix, as the user otherwise gains * access to the real filesystem of the server! * * The two following methods can be used to persitently mount further filesystems (without editing the code): * * - boolean/array egw_vfs::mount($url,$path) to mount $ur on $path or to return the fstab when called without argument * - boolean egw_vfs::umount($path) to unmount a path or url * * The stream wrapper interface allows to access hugh files in junks to not be limited by the * memory_limit setting of php. To do you should path a resource to the opened file and not the content: * * $file = egw_vfs::fopen('/home/user/somefile','r'); * $content = fread($file,1024); * * You can also attach stream filters, to eg. base64 encode or compress it on the fly, * without the need to hold the content of the whole file in memmory. * * If you want to copy a file, you can use stream_copy_to_stream to do a copy of a file far bigger then * php's memory_limit: * * $from = egw_vfs::fopen('/home/user/fromfile','r'); * $to = egw_vfs::fopen('/home/user/tofile','w'); * * stream_copy_to_stream($from,$to); * * The static egw_vfs::copy() method does exactly that, but you have to do it eg. on your own, if * you want to copy eg. an uploaded file into the vfs. */ class egw_vfs extends vfs_stream_wrapper { const PREFIX = 'vfs://default'; /** * Readable bit, for dirs traversable */ const READABLE = 4; /** * Writable bit, for dirs delete or create files in that dir */ const WRITABLE = 2; /** * Excecutable bit, here only use to check if user is allowed to search dirs */ const EXECUTABLE = 1; /** * Name of the lock table */ const LOCK_TABLE = 'egw_locks'; /** * Current user has root rights, no access checks performed! * * @var boolean */ static $is_root = false; /** * Current user id, in case we ever change if away from $GLOBALS['egw_info']['user']['account_id'] * * @var int */ static $user; /** * Current user is an eGW admin * * @var boolean */ static $is_admin = false; /** * Total of last find call * * @var int */ static $find_total; /** * Reference to the global db object * * @var egw_db */ static $db; /** * fopen working on just the eGW VFS * * @param string $path filename with absolute path in the eGW VFS * @param string $mode 'r', 'w', ... like fopen * @return resource */ static function fopen($path,$mode) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("Filename '$path' is not an absolute path!"); } return fopen(self::PREFIX.$path,$mode); } /** * opendir working on just the eGW VFS: returns resource for readdir() etc. * * @param string $path filename with absolute path in the eGW VFS * @return resource */ static function opendir($path) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("Directory '$path' is not an absolute path!"); } return opendir(self::PREFIX.$path); } /** * dir working on just the eGW VFS: returns directory object * * @param string $path filename with absolute path in the eGW VFS * @return Directory */ static function dir($path) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("Directory '$path' is not an absolute path!"); } return dir(self::PREFIX.$path); } /** * scandir working on just the eGW VFS: returns array with filenames as values * * @param string $path filename with absolute path in the eGW VFS * @param int $sorting_order=0 !$sorting_order (default) alphabetical in ascending order, $sorting_order alphabetical in descending order. * @return array */ static function scandir($path,$sorting_order=0) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("Directory '$path' is not an absolute path!"); } return scandir(self::PREFIX.$path,$sorting_order); } /** * copy working on just the eGW VFS * * @param string $from * @param string $to * @return boolean */ static function copy($from,$to) { $ret = false; if (($from_fp = self::fopen($from,'r')) && ($to_fp = self::fopen($to,'w'))) { $ret = stream_copy_to_stream($from_fp,$to_fp) !== false; } if ($from_fp) { fclose($from_fp); } if ($to_fp) { fclose($to_fp); } return $ret; } /** * stat working on just the eGW VFS (alias of url_stat) * * @param string $path filename with absolute path in the eGW VFS * @param boolean $try_create_home=false should a non-existing home-directory be automatically created * @return array */ static function stat($path,$try_create_home=false) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("File '$path' is not an absolute path!"); } if (($stat = self::url_stat($path,0,$try_create_home))) { $stat = array_slice($stat,13); // remove numerical indices 0-12 } return $stat; } /** * lstat (not resolving symbolic links) working on just the eGW VFS (alias of url_stat) * * @param string $path filename with absolute path in the eGW VFS * @param boolean $try_create_home=false should a non-existing home-directory be automatically created * @return array */ static function lstat($path,$try_create_home=false) { if ($path[0] != '/') { throw new egw_exception_assertion_failed("File '$path' is not an absolute path!"); } if (($stat = self::url_stat($path,STREAM_URL_STAT_LINK,$try_create_home))) { $stat = array_slice($stat,13); // remove numerical indices 0-12 } return $stat; } /** * is_dir() version working only inside the vfs * * @param string $path * @return boolean */ static function is_dir($path) { return $path[0] == '/' && is_dir(self::PREFIX.$path); } /** * is_link() version working only inside the vfs * * @param string $path * @return boolean */ static function is_link($path) { return $path[0] == '/' && is_link(self::PREFIX.$path); } /** * file_exists() version working only inside the vfs * * @param string $path * @return boolean */ static function file_exists($path) { return $path[0] == '/' && file_exists(self::PREFIX.$path); } /** * Mounts $url under $path in the vfs, called without parameter it returns the fstab * * The fstab is stored in the eGW configuration and used for all eGW users. * * @param string $url=null url of the filesystem to mount, eg. oldvfs://default/ * @param string $path=null path to mount the filesystem in the vfs, eg. / * @return array/boolean array with fstab, if called without parameter or true on successful mount */ static function mount($url=null,$path=null) { if (!isset($GLOBALS['egw_info']['server']['vfs_fstab'])) // happens eg. in setup { $api_config = config::read('phpgwapi'); if (isset($api_config['vfs_fstab']) && is_array($api_config['vfs_fstab'])) { self::$fstab = $api_config['vfs_fstab']; } unset($api_config); } if (is_null($url) || is_null($path)) { if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns '.array2string(self::$fstab)); return self::$fstab; } if (!self::$is_root) { if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') permission denied, you are NOT root!'); return false; // only root can mount } if (isset(self::$fstab[$path]) && self::$fstab[$path] === $url) { if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') already mounted.'); return true; // already mounted } self::load_wrapper(parse_url($url,PHP_URL_SCHEME)); if (!file_exists($url) || opendir($url) === false) { if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') url does NOT exist!'); return false; // url does not exist } self::$fstab[$path] = $url; uksort(self::$fstab,create_function('$a,$b','return strlen($a)-strlen($b);')); config::save_value('vfs_fstab',self::$fstab,'phpgwapi'); $GLOBALS['egw_info']['server']['vfs_fstab'] = self::$fstab; // invalidate session cache if (method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited { $GLOBALS['egw']->invalidate_session_cache(); } if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns true (successful new mount).'); return true; } /** * Unmounts a filesystem part of the vfs * * @param string $path url or path of the filesystem to unmount */ static function umount($path) { if (!self::$is_root) { if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') permission denied, you are NOT root!'); return false; // only root can mount } if (!isset(self::$fstab[$path]) && ($path = array_search($path,self::$fstab)) === false) { if (self::LOG_LEVEL > 0) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') NOT mounted!'); return false; // $path not mounted } unset(self::$fstab[$path]); config::save_value('vfs_fstab',self::$fstab,'phpgwapi'); $GLOBALS['egw_info']['server']['vfs_fstab'] = self::$fstab; // invalidate session cache if (method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited { $GLOBALS['egw']->invalidate_session_cache(); } if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($url).','.array2string($path).') returns true (successful unmount).'); return true; } /** * find = recursive search over the filesystem * * @param string/array $base base of the search * @param array $options=null the following keys are allowed: * - type => {d|f|F} d=dirs, f=files (incl. symlinks), F=files (incl. symlinks to files), default all * - depth => {true|false(default)} put the contents of a dir before the dir itself * - dirsontop => {true(default)|false} allways return dirs before the files (two distinct blocks) * - mindepth,maxdepth minimal or maximal depth to be returned * - name,path => pattern with *,? wildcards, eg. "*.php" * - name_preg,path_preg => preg regular expresion, eg. "/(vfs|wrapper)/" * - uid,user,gid,group,nouser,nogroup file belongs to user/group with given name or (numerical) id * - mime => type[/subtype] * - empty,size => (+|-|)N * - cmin/mmin => (+|-|)N file/dir create/modified in the last N minutes * - ctime/mtime => (+|-|)N file/dir created/modified in the last N days * - url => false(default),true allow (and return) full URL's instead of VFS pathes (only set it, if you know what you doing securitywise!) * - need_mime => false(default),true should we return the mime type * - order => name order rows by name column * - sort => (ASC|DESC) sort, default ASC * - limit => N,[n=0] return N entries from position n on, which defaults to 0 * - follow => {true|false(default)} follow symlinks * - hidden => {true|false(default)} include hidden files (name starts with a '.' or is Thumbs.db) * @param string/array/true $exec=null function to call with each found file/dir as first param and stat array as last param or * true to return file => stat pairs * @param array $exec_params=null further params for exec as array, path is always the first param and stat the last! * @return array of pathes if no $exec, otherwise path => stat pairs */ static function find($base,$options=null,$exec=null,$exec_params=null) { //error_log(__METHOD__."(".print_r($base,true).",".print_r($options,true).",".print_r($exec,true).",".print_r($exec_params,true).")\n"); $type = $options['type']; // 'd', 'f' or 'F' $dirs_last = $options['depth']; // put content of dirs before the dir itself // show dirs on top by default, if no recursive listing (allways disabled if $type specified, as unnecessary) $dirsontop = !$type && (isset($options['dirsontop']) ? (boolean)$options['dirsontop'] : isset($options['maxdepth'])&&$options['maxdepth']>0); // process some of the options (need to be done only once) if (isset($options['name']) && !isset($options['name_preg'])) // change from simple *,? wildcards to preg regular expression once { $options['name_preg'] = '/^'.str_replace(array('\\?','\\*'),array('.{1}','.*'),preg_quote($options['name'])).'$/i'; } if (isset($options['path']) && !isset($options['preg_path'])) // change from simple *,? wildcards to preg regular expression once { $options['path_preg'] = '/^'.str_replace(array('\\?','\\*'),array('.{1}','.*'),preg_quote($options['path'])).'$/i'; } if (!isset($options['uid'])) { if (isset($options['user'])) { $options['uid'] = $GLOBALS['egw']->accounts->name2id($options['user'],'account_lid','u'); } elseif (isset($options['nouser'])) { $options['uid'] = 0; } } if (!isset($options['gid'])) { if (isset($options['group'])) { $options['gid'] = abs($GLOBALS['egw']->accounts->name2id($options['group'],'account_lid','g')); } elseif (isset($options['nogroup'])) { $options['gid'] = 0; } } if ($options['order'] == 'mime') { $options['need_mime'] = true; // we need to return the mime colum } $url = $options['url']; if (!is_array($base)) { $base = array($base); } $result = array(); foreach($base as $path) { if (!$url) $path = egw_vfs::PREFIX . $path; if (!isset($options['remove'])) { $options['remove'] = count($base) == 1 ? count(explode('/',$path))-3+(int)(substr($path,-1)!='/') : 0; } $is_dir = is_dir($path); if ((int)$options['mindepth'] == 0 && (!$dirs_last || !$is_dir)) { self::_check_add($options,$path,$result); } if ($is_dir && (!isset($options['maxdepth']) || $options['maxdepth'] > 0) && ($dir = @opendir($path))) { while(($file = readdir($dir)) !== false) { if ($file == '.' || $file == '..') continue; // ignore current and parent dir! if (($file[0] == '.' || $file == 'Thumbs.db') && !$options['hidden']) continue; // ignore hidden files $file = self::concat($path,$file); if ((int)$options['mindepth'] <= 1) { self::_check_add($options,$file,$result); } // only descend into subdirs, if it's a real dir (no link to a dir) or we should follow symlinks if (is_dir($file) && ($options['follow'] || !is_link($file)) && (!isset($options['maxdepth']) || $options['maxdepth'] > 1)) { $opts = $options; if ($opts['mindepth']) $opts['mindepth']--; if ($opts['maxdepth']) $opts['maxdepth']++; unset($opts['order']); unset($opts['limit']); foreach(self::find($options['url']?$file:parse_url($file,PHP_URL_PATH),$opts,true) as $p => $s) { unset($result[$p]); $result[$p] = $s; } } } closedir($dir); } if ($is_dir && (int)$options['mindepth'] == 0 && $dirs_last) { self::_check_add($options,$path,$result); } } // sort code, to place directories before files, if $dirsontop enabled $dirsfirst = $dirsontop ? '($a[mime]==\''.self::DIR_MIME_TYPE.'\')!==($b[mime]==\''.self::DIR_MIME_TYPE.'\')?'. '($a[mime]==\''.self::DIR_MIME_TYPE.'\'?-1:1):' : ''; // ordering of the rows if (isset($options['order'])) { $sort = strtolower($options['sort']) == 'desc' ? '-' : ''; switch($options['order']) { // sort numerical case 'size': case 'uid': case 'gid': case 'mode': case 'ctime': case 'mtime': $code = $dirsfirst.$sort.'($a[\''.$options['order'].'\']-$b[\''.$options['order'].'\']);'; // always use name as second sort criteria $code = '$cmp = '.$code.' return $cmp ? $cmp : strcasecmp($a[\'name\'],$b[\'name\']);'; uasort($result,create_function('$a,$b',$code)); break; // sort alphanumerical default: $options['order'] = 'name'; // fall throught case 'name': case 'mime': $code = $dirsfirst.$sort.'strcasecmp($a[\''.$options['order'].'\'],$b[\''.$options['order'].'\']);'; if ($options['order'] != 'name') { // always use name as second sort criteria $code = '$cmp = '.$code.' return $cmp ? $cmp : strcasecmp($a[\'name\'],$b[\'name\']);'; } else { $code = 'return '.$code; } uasort($result,create_function('$a,$b',$code)); break; } //echo "order='$options[order]', sort='$options[sort]' --> '$c'
\n"; } // limit resultset self::$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=$limit
\n"; if ((int)$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 = $options['type']; // 'd' or 'f' if ($options['url']) { $stat = lstat($path); } else { $stat = self::url_stat($path,STREAM_URL_STAT_LINK); } if (!$stat) { return; // not found, should not happen } if ($type && (($type == 'd') == !($stat['mode'] & sqlfs_stream_wrapper::MODE_DIR) || // != is_dir() which can be true for symlinks $type == 'F' && is_dir($path))) // symlink to a directory { return; // wrong type } $stat = array_slice($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)) { //echo "

!preg_match('{$options['name_preg']}','{$stat['name']}')

\n"; 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['mtime'])/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,$allow_urls=false) { //error_log(__METHOD__.'('.array2string($urls).')'); // some precaution to never allow to (recursivly) remove /, /apps or /home foreach((array)$urls as $url) { if (preg_match('/^\/?(home|apps|)\/*$/',parse_url($url,PHP_URL_PATH))) { throw new egw_exception_assertion_failed(__METHOD__.'('.array2string($urls).") Cautiously rejecting to remove folder '$url'!"); } } return self::find($urls,array('depth'=>true,'url'=>$allow_urls,'hidden'=>true),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, M or G * * @param int $size * @return string */ static function hsize($size) { if ($size < 1024) return $size; if ($size < 1024*1024) return sprintf('%3.1lfk',(float)$size/1024); if ($size < 1024*1024*1024) return sprintf('%3.1lfM',(float)$size/(1024*1024)); return sprintf('%3.1lfG',(float)$size/(1024*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) { list($path,$query) = explode('?',$path); // remove query $parts = explode('/',$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($url) { list($url,$query) = explode('?',$url,2); // strip the query first, as it can contain slashes 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/ } //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,$force_download=false) { if (($url = self::_call_on_backend('download_url',array($path,$force_download),true))) { return $url; } if ($path[0] != '/') { $path = parse_url($path,PHP_URL_PATH); } // we do NOT need to encode % itself, as our path are already url encoded, with the exception of ' ' and '+' // we urlencode double quotes '"', as that fixes many problems in html markup return '/webdav.php'.strtr($path,array('+' => '%2B',' ' => '%20','"' => '%22')); } /** * 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; /** * Log (to error log) all calls to lock(), unlock() or checkLock() * */ const LOCK_DEBUG = false; /** * 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, ),__LINE__,__FILE__)->fetch()))) { $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( 'lock_path' => $path, 'lock_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) { $ret = false; // there's already a lock } } if (self::LOCK_DEBUG) error_log(__METHOD__."($path,$token,$timeout,$owner,$scope,$type,update=$update,check_writable=$check_writable) returns ".($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]); } if (self::LOCK_DEBUG) 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])) { if (self::LOCK_DEBUG) 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' => $result['token'], ),__LINE__,__FILE__); if (self::LOCK_DEBUG) error_log(__METHOD__."($path) lock is expired at ".date('Y-m-d H:i:s',$result['expires'])." --> removed"); $result = false; } if (self::LOCK_DEBUG) error_log(__METHOD__."($path) returns ".($result?array2string($result):'false')); return self::$lock_cache[$path] = $result; } /** * Get backend specific information (data and etemplate), to integrate as tab in filemanagers settings dialog * * @param string $path * @param array $content=null * @return array|boolean array with values for keys 'data','etemplate','name','label','help' or false if not supported by backend */ static function getExtraInfo($path,array $content=null) { return self::_call_on_backend('extra_info',array($path,$content),true); // true = fail silent if backend does NOT support it } /** * 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"; } /** * Encoding of various special characters, which can NOT be unencoded in file-names, as they have special meanings in URL's * * @var array */ static public $encode = array( '%' => '%25', '#' => '%23', '?' => '%3F', '/' => '', // better remove it completly ); /** * Encode a path component: replacing certain chars with their urlencoded counterparts * * Not all chars get encoded, slashes '/' are silently removed! * * To reverse the encoding, eg. to display a filename to the user, you can use urldecode() * * @param string|array $component * @return string|array */ static public function encodePathComponent($component) { return str_replace(array_keys(self::$encode),array_values(self::$encode),$component); } /** * Encode a path: replacing certain chars with their urlencoded counterparts * * To reverse the encoding, eg. to display a filename to the user, you can use urldecode() * * @param string $path * @return string */ static public function encodePath($path) { return implode('/',self::encodePathComponent(explode('/',$path))); } /** * Initialise our static vars */ static function init_static() { self::$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();