mirror of
https://github.com/EGroupware/egroupware.git
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686 lines
21 KiB
PHP
686 lines
21 KiB
PHP
<?php
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/**
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* eGroupWare API: VFS - old (until eGW 1.4 inclusive) VFS stream wrapper
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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) 2007 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @version $Id$
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*/
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require_once(EGW_API_INC.'/class.vfs_home.inc.php');
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require_once(EGW_API_INC.'/class.iface_stream_wrapper.inc.php');
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/**
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* eGroupWare API: VFS - old (until eGW 1.4 inclusive) VFS stream wrapper
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*
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* This class uses eGW's vfs_home class to access the vfs.
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*
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* The interface is according to the docu on php.net
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*
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* @link http://de.php.net/manual/de/function.stream-wrapper-register.php
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*/
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class oldvfs_stream_wrapper implements iface_stream_wrapper
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{
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/**
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* If this class should do the operations direct in the filesystem, instead of going through the vfs
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*
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*/
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const USE_FILESYSTEM_DIRECT = true;
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/**
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* How much should be logged to the apache error-log
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*
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* 0 = Nothing
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* 1 = only errors
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* 2 = all function calls and errors
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*/
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const LOG_LEVEL = 1;
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/**
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* optional context param when opening the stream, null if no context passed
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*
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* @var mixed
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*/
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var $context;
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/**
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* Instance of the old vfs class
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*
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* @var vfs_home
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*/
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static protected $old_vfs;
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/**
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* Path off the file opened by stream_open
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*
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* @var string
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*/
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protected $opened_path;
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/**
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* Mode of the file opened by stream_open
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*
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* @var int
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*/
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protected $opened_mode;
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/**
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* Content of the opened file, as the old vfs can only read/write the whole file
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*
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* @var string
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*/
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protected $opened_data;
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/**
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* Position in the opened file
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*
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* @var int
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*/
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protected $opened_pos;
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/**
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* Global vfs::ls() cache
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*
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* @var array
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*/
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static protected $cache=array();
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/**
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* Directory vfs::ls() of path opened with dir_opendir()
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*
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* @var string
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*/
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protected $opened_dir;
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/**
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* Constructor
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*
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* @return oldvfs_stream_wrapper
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*/
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function __construct()
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{
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if (self::LOG_LEVEL > 1) error_log('oldvfs_stream_wrapper::__construct()');
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if (!is_object(self::$old_vfs))
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{
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self::$old_vfs =& new vfs_home();
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}
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}
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/**
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* This method is called immediately after your stream object is created.
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*
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* @param string $url URL that was passed to fopen() and that this object is expected to retrieve
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* @param string $mode mode used to open the file, as detailed for fopen()
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* @param int $options additional flags set by the streams API (or'ed together):
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* - STREAM_USE_PATH If path is relative, search for the resource using the include_path.
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* - STREAM_REPORT_ERRORS If this flag is set, you are responsible for raising errors using trigger_error() during opening of the stream.
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* If this flag is not set, you should not raise any errors.
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* @param string $opened_path full path of the file/resource, if the open was successfull and STREAM_USE_PATH was set
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* @return boolean true if the ressource was opened successful, otherwise false
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*/
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function stream_open ( $url, $mode, $options, &$opened_path )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$mode,$options)");
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$path = parse_url($url,PHP_URL_PATH);
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$this->opened_path = $path;
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$this->opened_mode = $mode;
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$this->opened_data = null;
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if (!self::$old_vfs->file_exists($data = array( // file does not exists
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'string' => $path,
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'relatives' => array(RELATIVE_ROOT),
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)) || $mode[0] == 'x') // or file should NOT exist
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{
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if ($mode[0] == 'r' || // does $mode require the file to exist (r,r+)
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$mode[0] == 'x' || // or file should not exist, but does
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!self::$old_vfs->acl_check($data+array( // or we are not allowed to create it
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'operation' => EGW_ACL_ADD,
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)))
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{
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if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) file does not exist or can not be created!");
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$this->opened_data = $this->opened_path = $this->opened_mode = null;
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return false;
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}
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// new file
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$this->opened_data = '';
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$this->opened_pos = 0;
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}
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else
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{
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if ($mode != 'r' && !self::$old_vfs->acl_check($data+array( // we are not allowed to edit it
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'operation' => EGW_ACL_EDIT,
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)))
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{
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if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) file can not be edited!");
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$this->opened_data = $this->opened_path = $this->opened_mode = null;
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return false;
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}
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if ($mode[0] == 'w') // w or w+ truncates the file to 0 size
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{
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$this->opened_data = '';
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$this->opened_pos = 0;
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}
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}
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// can we operate directly on a filesystem stream?
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if (self::$old_vfs->file_actions && self::USE_FILESYSTEM_DIRECT)
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{
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$p = self::$old_vfs->path_parts($data);
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if (!($this->opened_data = fopen($p->real_full_path,$mode,false)))
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{
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if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) file $p->real_full_path can not be opened!");
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return false;
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}
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}
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if ($mode[0] == 'a') // append modes: a, a+
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{
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$this->stream_seek(0,SEEK_END);
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}
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return true;
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}
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/**
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* This method is called when the stream is closed, using fclose().
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*
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* You must release any resources that were locked or allocated by the stream.
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*/
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function stream_close ( )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
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if (is_null($this->opened_path)) return false;
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$ret = true;
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if (is_resource($this->opened_data))
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{
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$ret = fclose($this->opened_data);
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if ($this->opened_mode != 'r')
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{
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// touch creates file (if necessary) and sets the modification or creation time and owner
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self::$old_vfs->touch($data = array(
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'string' => $this->opened_path,
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'relatives' => array(RELATIVE_ROOT), // filename is relative to the vfs-root
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));
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// we read the size from the filesystem and write it to our db-based metadata
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$p = self::$old_vfs->path_parts($data);
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$data['attributes'] = array(
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'size' => filesize($p->real_full_path),
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);
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self::$old_vfs->set_attributes($data);
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}
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}
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elseif ($this->opened_mode != 'r')
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{
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// store the changes
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self::$old_vfs->write($this->opened_data);
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}
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$this->opened_data = $this->opened_path = $this->opened_mode = null;
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return $ret;
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}
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/**
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* This method is called in response to fread() and fgets() calls on the stream.
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*
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* You must return up-to count bytes of data from the current read/write position as a string.
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* If there are less than count bytes available, return as many as are available.
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* If no more data is available, return either FALSE or an empty string.
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* You must also update the read/write position of the stream by the number of bytes that were successfully read.
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*
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* @param int $count
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* @return string/false up to count bytes read or false on EOF
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*/
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function stream_read ( $count )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($count) pos=$this->opened_pos");
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if (is_resource($this->opened_data))
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{
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return fread($this->opened_data,$count);
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}
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if (is_null($this->opened_data))
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{
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if (($this->opened_data = self::$old_vfs->read(array(
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'string' => $this->opened_path,
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'relatives' => array(RELATIVE_ROOT), // filename is relative to the vfs-root
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))) === false)
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{
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return false;
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}
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$this->opened_pos = 0;
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}
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if ($this->stream_eof()) return false; // nothing more to read
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$start = $this->opened_pos;
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$this->opened_pos += $count;
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// multibyte save substr!
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return self::substr($this->opened_data,$start,$count);
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}
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/**
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* This method is called in response to fwrite() calls on the stream.
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*
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* You should store data into the underlying storage used by your stream.
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* If there is not enough room, try to store as many bytes as possible.
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* You should return the number of bytes that were successfully stored in the stream, or 0 if none could be stored.
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* You must also update the read/write position of the stream by the number of bytes that were successfully written.
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*
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* @param string $data
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* @return integer
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*/
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function stream_write ( $data )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($data)");
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if (is_resource($this->opened_data))
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{
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return fwrite($this->opened_data,$data);
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}
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$len = bytes($data);
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// multibyte save substr!
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self::substr($this->opened_data,$this->opened_pos);
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$this->opened_pos += $len;
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return $len;
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}
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/**
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* This method is called in response to feof() calls on the stream.
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*
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* Important: PHP 5.0 introduced a bug that wasn't fixed until 5.1: the return value has to be the oposite!
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*
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* if(version_compare(PHP_VERSION,'5.0','>=') && version_compare(PHP_VERSION,'5.1','<'))
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* {
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* $eof = !$eof;
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* }
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*
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* @return boolean true if the read/write position is at the end of the stream and no more data availible, false otherwise
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*/
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function stream_eof ( )
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{
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if (is_resource($this->opened_data))
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{
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return feof($this->opened_data);
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}
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if (!is_null($this->opened_data))
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{
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$len = bytes($this->opened_data);
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$eof = $this->opened_pos >= $len;
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}
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."() pos=$this->opened_pos >= $len=len --> ".($eof ? 'true' : 'false'));
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return $eof;
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}
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/**
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* This method is called in response to ftell() calls on the stream.
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*
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* @return integer current read/write position of the stream
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*/
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function stream_tell ( )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
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if (is_resource($this->opened_data))
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{
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return ftell($this->opened_data);
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}
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return $this->opened_pos;
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}
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/**
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* This method is called in response to fseek() calls on the stream.
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*
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* You should update the read/write position of the stream according to offset and whence.
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* See fseek() for more information about these parameters.
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*
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* @param integer $offset
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* @param integer $whence SEEK_SET - Set position equal to offset bytes
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* SEEK_CUR - Set position to current location plus offset.
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* SEEK_END - Set position to end-of-file plus offset. (To move to a position before the end-of-file, you need to pass a negative value in offset.)
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* @return boolean TRUE if the position was updated, FALSE otherwise.
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*/
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function stream_seek ( $offset, $whence )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($offset,$whence)");
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if (is_resource($this->opened_data))
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{
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return fseek($this->opened_data,$offset,$whence);
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}
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if (is_null($this->opened_path)) return false;
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switch($whence)
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{
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default:
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case SEEK_SET:
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$this->opened_pos = $offset;
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break;
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case SEEK_END:
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$this->opened_pos = bytes($this->opened_data);
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// fall through
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case SEEK_CUR:
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$this->opened_pos += $offset;
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break;
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}
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return true;
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}
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/**
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* This method is called in response to fflush() calls on the stream.
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*
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* If you have cached data in your stream but not yet stored it into the underlying storage, you should do so now.
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*
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* @return booelan TRUE if the cached data was successfully stored (or if there was no data to store), or FALSE if the data could not be stored.
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*/
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function stream_flush ( )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
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if (is_resource($this->opened_data))
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{
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return fflush($this->opened_data);
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}
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return true;
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}
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/**
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* This method is called in response to fstat() calls on the stream.
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*
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* If you plan to use your wrapper in a require_once you need to define stream_stat().
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* If you plan to allow any other tests like is_file()/is_dir(), you have to define url_stat().
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* stream_stat() must define the size of the file, or it will never be included.
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* url_stat() must define mode, or is_file()/is_dir()/is_executable(), and any of those functions affected by clearstatcache() simply won't work.
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* It's not documented, but directories must be a mode like 040777 (octal), and files a mode like 0100666.
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* If you wish the file to be executable, use 7s instead of 6s.
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* The last 3 digits are exactly the same thing as what you pass to chmod.
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* 040000 defines a directory, and 0100000 defines a file.
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*
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* @return array containing the same values as appropriate for the stream.
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*/
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function stream_stat ( )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($this->opened_path)");
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return $this->url_stat($this->opened_path,0);
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}
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/**
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* This method is called in response to unlink() calls on URL paths associated with the wrapper.
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*
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* It should attempt to delete the item specified by path.
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* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support unlinking!
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*
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* @param string $path
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* @return boolean TRUE on success or FALSE on failure
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*/
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static function unlink ( $path )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."($path)");
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if (!is_object(self::$old_vfs))
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{
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self::$old_vfs =& new vfs_home();
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}
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$data=array(
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'string' => $path,
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'relatives' => array(RELATIVE_ROOT), // filename is relative to the vfs-root
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);
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if (!self::$old_vfs->acl_check($data+array(
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'operation' => EGW_ACL_DELETE
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)) /*|| ($type = self::$old_vfs->file_type($data)) === 'Directory'*/)
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{
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if (self::LOG_LEVEL) error_log(__METHOD__."($path) (type=$type) permission denied!");
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return false; // no permission or file does not exist
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}
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return self::$old_vfs->rm($data);
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}
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/**
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* This method is called in response to rename() calls on URL paths associated with the wrapper.
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*
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* It should attempt to rename the item specified by path_from to the specification given by path_to.
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* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support renaming.
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*
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* @param string $path_from
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* @param string $path_to
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* @return boolean TRUE on success or FALSE on failure
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*/
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function rename ( $path_from, $path_to )
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{
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error_log(__METHOD__."($path_from, $path_to) not yet implemented!");
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}
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/**
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* This method is called in response to mkdir() calls on URL paths associated with the wrapper.
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*
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* It should attempt to create the directory specified by path.
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* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support creating directories.
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*
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* @param string $path
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* @param int $mode
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* @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
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* @return boolean TRUE on success or FALSE on failure
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*/
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function mkdir ( $path, $mode, $options )
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{
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error_log(__METHOD__."($path, $mode, $options) not yet implemented!");
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}
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/**
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* This method is called in response to rmdir() calls on URL paths associated with the wrapper.
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*
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* It should attempt to remove the directory specified by path.
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* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support removing directories.
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*
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* @param string $path
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* @param int $options Possible values include STREAM_REPORT_ERRORS.
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* @return boolean TRUE on success or FALSE on failure.
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*/
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function rmdir ( $path, $options )
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{
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error_log(__METHOD__."($path, $options) not yet implemented!");
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}
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/**
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* This method is called immediately when your stream object is created for examining directory contents with opendir().
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*
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* @param string $path URL that was passed to opendir() and that this object is expected to explore.
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* @param $options
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* @return booelan
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*/
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function dir_opendir ( $url, $options )
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{
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if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$url',$options)");
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if (!is_object(self::$old_vfs))
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{
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self::$old_vfs =& new vfs_home();
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}
|
|
$path = parse_url($url,PHP_URL_PATH);
|
|
|
|
$this->opened_dir = self::$old_vfs->ls(array(
|
|
'string' => $path,
|
|
'relatives' => array(RELATIVE_ROOT), // filename is relative to the vfs-root
|
|
'checksubdirs' => false,
|
|
'nofiles' => false,
|
|
//'orderby' => '',
|
|
//'mime_type' => '',
|
|
));
|
|
if (!is_array($this->opened_dir) ||
|
|
// we also need to return false, if $url is not a directory!
|
|
count($this->opened_dir) == 1 && $path == $this->opened_dir[0]['directory'].'/'.$this->opened_dir[0]['name'] &&
|
|
$this->opened_dir[0]['mime_type'] != 'Directory')
|
|
{
|
|
$this->opened_dir = null;
|
|
return false;
|
|
}
|
|
//print_r($this->opened_dir);
|
|
reset($this->opened_dir);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* This method is called in response to stat() calls on the URL paths associated with the wrapper.
|
|
*
|
|
* It should return as many elements in common with the system function as possible.
|
|
* Unknown or unavailable values should be set to a rational value (usually 0).
|
|
*
|
|
* If you plan to use your wrapper in a require_once you need to define stream_stat().
|
|
* If you plan to allow any other tests like is_file()/is_dir(), you have to define url_stat().
|
|
* stream_stat() must define the size of the file, or it will never be included.
|
|
* url_stat() must define mode, or is_file()/is_dir()/is_executable(), and any of those functions affected by clearstatcache() simply won't work.
|
|
* It's not documented, but directories must be a mode like 040777 (octal), and files a mode like 0100666.
|
|
* If you wish the file to be executable, use 7s instead of 6s.
|
|
* The last 3 digits are exactly the same thing as what you pass to chmod.
|
|
* 040000 defines a directory, and 0100000 defines a file.
|
|
*
|
|
* @param string $path
|
|
* @param int $flags holds additional flags set by the streams API. It can hold one or more of the following values OR'd together:
|
|
* - STREAM_URL_STAT_LINK For resources with the ability to link to other resource (such as an HTTP Location: forward,
|
|
* or a filesystem symlink). This flag specified that only information about the link itself should be returned,
|
|
* not the resource pointed to by the link.
|
|
* This flag is set in response to calls to lstat(), is_link(), or filetype().
|
|
* - STREAM_URL_STAT_QUIET If this flag is set, your wrapper should not raise any errors. If this flag is not set,
|
|
* you are responsible for reporting errors using the trigger_error() function during stating of the path.
|
|
* @return array
|
|
*/
|
|
function url_stat ( $url, $flags )
|
|
{
|
|
if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$url',$flags)");
|
|
|
|
/*return array(
|
|
'mode' => 0100666,
|
|
'name' => basename(parse_url($path,PHP_URL_PATH)),
|
|
'size' => strlen(basename(parse_url($path,PHP_URL_PATH))),
|
|
'nlink' => 1,
|
|
'uid' => 1000,
|
|
'gid' => 100,
|
|
'mtime' => time(),
|
|
);*/
|
|
|
|
if (!is_object(self::$old_vfs))
|
|
{
|
|
self::$old_vfs =& new vfs_home();
|
|
}
|
|
$path = parse_url($url,PHP_URL_PATH);
|
|
|
|
list($info) = self::$old_vfs->ls(array(
|
|
'string' => $path,
|
|
'relatives' => array(RELATIVE_ROOT), // filename is relative to the vfs-root
|
|
'checksubdirs' => false,
|
|
'nofiles' => true,
|
|
//'orderby' => '',
|
|
//'mime_type' => '',
|
|
));
|
|
//print_r($info);
|
|
|
|
return $info ? $this->vfsinfo2stat($info) : false;
|
|
}
|
|
|
|
/**
|
|
* This method is called in response to readdir().
|
|
*
|
|
* It should return a string representing the next filename in the location opened by dir_opendir().
|
|
*
|
|
* @return string
|
|
*/
|
|
function dir_readdir ( )
|
|
{
|
|
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($this->opened_dir_path)");
|
|
|
|
if (!is_array($this->opened_dir)) return false;
|
|
|
|
$file = current($this->opened_dir); next($this->opened_dir);
|
|
|
|
return $file ? $file['name'] : false;
|
|
}
|
|
|
|
/**
|
|
* This method is called in response to rewinddir().
|
|
*
|
|
* It should reset the output generated by dir_readdir(). i.e.:
|
|
* The next call to dir_readdir() should return the first entry in the location returned by dir_opendir().
|
|
*
|
|
* @return boolean
|
|
*/
|
|
function dir_rewinddir ( )
|
|
{
|
|
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($this->opened_dir_path)");
|
|
|
|
if (!is_array($this->opened_dir)) return false;
|
|
|
|
reset($this->opened_dir);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* This method is called in response to closedir().
|
|
*
|
|
* You should release any resources which were locked or allocated during the opening and use of the directory stream.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
function dir_closedir ( )
|
|
{
|
|
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($this->opened_dir_path)");
|
|
|
|
if (!is_array($this->opened_dir)) return false;
|
|
|
|
$this->opened_dir = $this->opened_dir_path = null;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Convert a vfs-file-info into a stat array
|
|
*
|
|
* @param array $info
|
|
* @return array
|
|
*/
|
|
function vfsinfo2stat($info)
|
|
{
|
|
$stat = array(
|
|
'ino' => $info['file_id'],
|
|
'name' => $info['name'],
|
|
'mode' => $info['mime_type'] == 'Directory' ? 040700 : 0100600,
|
|
'size' => $info['size'],
|
|
'uid' => $info['owner_id'] > 0 ? $info['owner_id'] : 0,
|
|
'gid' => $info['owner_id'] < 0 ? $info['owner_id'] : 0,
|
|
'mtime' => strtotime($info['modified'] ? $info['modified'] : $info['created']),
|
|
'ctime' => strtotime($info['created']),
|
|
'nlink' => $info['mime_type'] == 'Directory' ? 2 : 1,
|
|
);
|
|
//print_r($stat);
|
|
return $stat;
|
|
}
|
|
|
|
/**
|
|
* Multibyte save substr
|
|
*
|
|
* @param string $str
|
|
* @param int $start
|
|
* @param int $length=null
|
|
* @return string
|
|
*/
|
|
static function substr($str,$start,$length=null)
|
|
{
|
|
static $func_overload;
|
|
|
|
if (is_null($func_overload)) $func_overload = extension_loaded('mbstring') ? ini_get('mbstring.func_overload') : 0;
|
|
|
|
return $func_overload & 2 ? mb_substr($str,$start,$length,'ascii') : substr($str,$start,$length);
|
|
}
|
|
}
|
|
|
|
stream_register_wrapper('oldvfs','oldvfs_stream_wrapper');
|