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egroupware/phpgwapi/inc/class.sqlfs_stream_wrapper.inc.php

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<?php
/**
* EGroupware API: VFS - new DB based VFS stream wrapper
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage vfs
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008-12 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
/**
* eGroupWare API: VFS - new DB based VFS stream wrapper
*
* The sqlfs stream wrapper has 2 operation modi:
* - content of files is stored in the filesystem (eGW's files_dir) (default)
* - content of files is stored as BLOB in the DB (can be enabled by mounting sqlfs://...?storage=db)
* please note the current (php5.2.6) problems:
* a) retriving files via streams does NOT work for PDO_mysql (bindColum(,,PDO::PARAM_LOB) does NOT work, string returned)
* (there's a workaround implemented, but it requires to allocate memory for the whole file!)
* b) uploading/writing files > 1M fail on PDOStatement::execute() (setting PDO::MYSQL_ATTR_MAX_BUFFER_SIZE does NOT help)
* (not sure if that's a bug in PDO/PDO_mysql or an accepted limitation)
* - content of files is versioned (and stored in the DB) NOT YET IMPLEMENTED
* In the future it will be possible to activate eg. versioning in parts of the filesystem, via mount options in the vfs
*
* I use the PDO DB interface, as it allows to access BLOB's as streams (avoiding to hold them complete in memory).
*
* The stream wrapper interface is according to the docu on php.net
*
* @link http://www.php.net/manual/en/function.stream-wrapper-register.php
*/
class sqlfs_stream_wrapper implements iface_stream_wrapper
{
/**
* Mime type of directories, the old vfs uses 'Directory', while eg. WebDAV uses 'httpd/unix-directory'
*/
const DIR_MIME_TYPE = 'httpd/unix-directory';
/**
* Mime type for symlinks
*/
const SYMLINK_MIME_TYPE = 'application/x-symlink';
/**
* Scheme / protocoll used for this stream-wrapper
*/
const SCHEME = 'sqlfs';
/**
* Does url_stat returns a mime type, or has it to be determined otherwise (string with attribute name)
*/
const STAT_RETURN_MIME_TYPE = 'mime';
/**
* Our tablename
*/
const TABLE = 'egw_sqlfs';
/**
* Name of our property table
*/
const PROPS_TABLE = 'egw_sqlfs_props';
/**
* mode-bits, which have to be set for files
*/
const MODE_FILE = 0100000;
/**
* mode-bits, which have to be set for directories
*/
const MODE_DIR = 040000;
/**
* mode-bits, which have to be set for links
*/
const MODE_LINK = 0120000;
/**
* How much should be logged to the apache error-log
*
* 0 = Nothing
* 1 = only errors
* 2 = all function calls and errors (contains passwords too!)
* 3 = log line numbers in sql statements
*/
const LOG_LEVEL = 1;
/**
* We store the content in the DB (no versioning)
*/
const STORE2DB = 1;
/**
* We store the content in the filesystem (egw_info/server/files_dir) (no versioning)
*/
const STORE2FS = 2;
/**
* default for operation, change that if you want to test with STORE2DB atm
*/
const DEFAULT_OPERATION = self::STORE2FS;
/**
* operation mode of the opened file
*
* @var int
*/
protected $operation = self::DEFAULT_OPERATION;
/**
* optional context param when opening the stream, null if no context passed
*
* @var mixed
*/
var $context;
/**
* Path off the file opened by stream_open
*
* @var string
*/
protected $opened_path;
/**
* Mode of the file opened by stream_open
*
* @var int
*/
protected $opened_mode;
/**
* Stream of the opened file, either from the DB via PDO or the filesystem
*
* @var resource
*/
protected $opened_stream;
/**
* fs_id of opened file
*
* @var int
*/
protected $opened_fs_id;
/**
* Cache containing stat-infos from previous url_stat calls AND dir_opendir calls
*
* It's values are the columns read from the DB (fs_*), not the ones returned by url_stat!
*
* @var array $path => info-array pairs
*/
static protected $stat_cache = array();
/**
* Reference to the PDO object we use
*
* @var PDO
*/
static protected $pdo;
/**
* Array with filenames of dir opened with dir_opendir
*
* @var array
*/
protected $opened_dir;
/**
* Extra columns added since the intitial introduction of sqlfs
*
* Can be set to empty, so get queries running on old versions of sqlfs, eg. for schema updates
*
* @var string;
*/
static public $extra_columns = ',fs_link';
/**
* Clears our stat-cache
*
* Normaly not necessary, as it is automatically cleared/updated, UNLESS egw_vfs::$user changes!
*
* @param string $path='/'
*/
public static function clearstatcache($path='/')
{
//error_log(__METHOD__."('$path')");
self::$stat_cache = array();
$GLOBALS['egw']->session->appsession('extended_acl',self::EACL_APPNAME,self::$extended_acl = null);
}
/**
* This method is called immediately after your stream object is created.
*
* @param string $url URL that was passed to fopen() and that this object is expected to retrieve
* @param string $mode mode used to open the file, as detailed for fopen()
* @param int $options additional flags set by the streams API (or'ed together):
* - STREAM_USE_PATH If path is relative, search for the resource using the include_path.
* - STREAM_REPORT_ERRORS If this flag is set, you are responsible for raising errors using trigger_error() during opening of the stream.
* If this flag is not set, you should not raise any errors.
* @param string &$opened_path full path of the file/resource, if the open was successfull and STREAM_USE_PATH was set
* @param array $overwrite_new=null if set create new file with values overwriten by the given ones
* @param string $class=__CLASS__ class to use to call static methods, eg url_stat (workaround for no late static binding in php < 5.3)
* @todo remove $class parameter and use static::url_stat() once we require PHP5.3!
* @return boolean true if the ressource was opened successful, otherwise false
*/
function stream_open ( $url, $mode, $options, &$opened_path, array $overwrite_new=null, $class=__CLASS__ )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$mode,$options)");
$path = parse_url($url,PHP_URL_PATH);
$this->operation = self::url2operation($url);
$dir = egw_vfs::dirname($url);
$this->opened_path = $path;
$this->opened_mode = $mode = str_replace('b','',$mode); // we are always binary, like every Linux system
$this->opened_stream = null;
if (!is_null($overwrite_new) || !($stat = call_user_func(array($class,'url_stat'),$path,STREAM_URL_STAT_QUIET)) || $mode[0] == 'x') // file not found or file should NOT exist
{
if ($mode[0] == 'r' || // does $mode require the file to exist (r,r+)
$mode[0] == 'x' || // or file should not exist, but does
!($dir_stat=call_user_func(array($class,'url_stat'),$dir,STREAM_URL_STAT_QUIET)) || // or parent dir does not exist create it
!egw_vfs::check_access($dir,egw_vfs::WRITABLE,$dir_stat)) // or we are not allowed to create it
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) file does not exist or can not be created!");
if (($options & STREAM_REPORT_ERRORS))
{
trigger_error(__METHOD__."($url,$mode,$options) file does not exist or can not be created!",E_USER_WARNING);
}
$this->opened_stream = $this->opened_path = $this->opened_mode = null;
return false;
}
// new file --> create it in the DB
$new_file = true;
$query = 'INSERT INTO '.self::TABLE.' (fs_name,fs_dir,fs_mode,fs_uid,fs_gid,fs_created,fs_modified,fs_creator,fs_mime,fs_size,fs_active'.
') VALUES (:fs_name,:fs_dir,:fs_mode,:fs_uid,:fs_gid,:fs_created,:fs_modified,:fs_creator,:fs_mime,:fs_size,:fs_active)';
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
$stmt = self::$pdo->prepare($query);
$values = array(
'fs_name' => egw_vfs::basename($path),
'fs_dir' => $dir_stat['ino'],
// we use the mode of the dir, so files in group dirs stay accessible by all members
'fs_mode' => $dir_stat['mode'] & 0666,
// for the uid we use the uid of the dir if not 0=root or the current user otherwise
'fs_uid' => $dir_stat['uid'] ? $dir_stat['uid'] : egw_vfs::$user,
// we allways use the group of the dir
'fs_gid' => $dir_stat['gid'],
'fs_created' => self::_pdo_timestamp(time()),
'fs_modified' => self::_pdo_timestamp(time()),
'fs_creator' => egw_vfs::$user,
'fs_mime' => 'application/octet-stream', // required NOT NULL!
'fs_size' => 0,
'fs_active' => self::_pdo_boolean(true),
);
if ($overwrite_new) $values = array_merge($values,$overwrite_new);
if (!$stmt->execute($values) || !($this->opened_fs_id = self::$pdo->lastInsertId('egw_sqlfs_fs_id_seq')))
{
$this->opened_stream = $this->opened_path = $this->opened_mode = null;
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) execute() failed: ".self::$pdo->errorInfo());
return false;
}
if ($this->operation == self::STORE2DB)
{
// we buffer all write operations in a temporary file, which get's written on close
$this->opened_stream = tmpfile();
}
// create the hash-dirs, if they not yet exist
elseif(!file_exists($fs_dir=egw_vfs::dirname(self::_fs_path($this->opened_fs_id))))
{
$umaskbefore = umask();
if (self::LOG_LEVEL > 1) error_log(__METHOD__." about to call mkdir for $fs_dir # Present UMASK:".decoct($umaskbefore)." called from:".function_backtrace());
self::mkdir_recursive($fs_dir,0700,true);
}
}
// check if opend file is a directory
elseif($stat && ($stat['mode'] & self::MODE_DIR) == self::MODE_DIR)
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) Is a directory!");
if (($options & STREAM_REPORT_ERRORS))
{
trigger_error(__METHOD__."($url,$mode,$options) Is a directory!",E_USER_WARNING);
}
$this->opened_stream = $this->opened_path = $this->opened_mode = null;
return false;
}
else
{
if ($mode == 'r' && !egw_vfs::check_access($url,egw_vfs::READABLE ,$stat) ||// we are not allowed to read
$mode != 'r' && !egw_vfs::check_access($url,egw_vfs::WRITABLE,$stat)) // or edit it
{
self::_remove_password($url);
$op = $mode == 'r' ? 'read' : 'edited';
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) file can not be $op!");
if (($options & STREAM_REPORT_ERRORS))
{
trigger_error(__METHOD__."($url,$mode,$options) file can not be $op!",E_USER_WARNING);
}
$this->opened_stream = $this->opened_path = $this->opened_mode = null;
return false;
}
$this->opened_fs_id = $stat['ino'];
if ($this->operation == self::STORE2DB)
{
$stmt = self::$pdo->prepare($sql='SELECT fs_content FROM '.self::TABLE.' WHERE fs_id=?');
$stmt->execute(array($stat['ino']));
$stmt->bindColumn(1,$this->opened_stream,PDO::PARAM_LOB);
$stmt->fetch(PDO::FETCH_BOUND);
// hack to work around a current php bug (http://bugs.php.net/bug.php?id=40913)
// PDOStatement::bindColumn(,,PDO::PARAM_LOB) is not working for MySQL, content is returned as string :-(
if (is_string($this->opened_stream))
{
$name = md5($url);
$GLOBALS[$name] =& $this->opened_stream; unset($this->opened_stream);
require_once(EGW_API_INC.'/class.global_stream_wrapper.inc.php');
$this->opened_stream = fopen('global://'.$name,'r');
unset($GLOBALS[$name]); // unset it, so it does not use up memory, once the stream is closed
}
//echo 'gettype($this->opened_stream)='; var_dump($this->opened_stream);
}
}
// do we operate directly on the filesystem --> open file from there
if ($this->operation == self::STORE2FS)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__." fopen (may create a directory? mkdir) ($this->opened_fs_id,$mode,$options)");
if (!($this->opened_stream = fopen(self::_fs_path($this->opened_fs_id),$mode)) && $new_file)
{
// delete db entry again, if we are not able to open a new(!) file
unset($stmt);
$stmt = self::$pdo->prepare('DELETE FROM '.self::TABLE.' WHERE fs_id=:fs_id');
$stmt->execute(array('fs_id' => $this->opened_fs_id));
}
}
if ($mode[0] == 'a') // append modes: a, a+
{
$this->stream_seek(0,SEEK_END);
}
if (!is_resource($this->opened_stream)) error_log(__METHOD__."($url,$mode,$options) NO stream, returning false!");
return is_resource($this->opened_stream);
}
/**
* This method is called when the stream is closed, using fclose().
*
* You must release any resources that were locked or allocated by the stream.
*/
function stream_close ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
if (is_null($this->opened_path) || !is_resource($this->opened_stream) || !$this->opened_fs_id)
{
return false;
}
if ($this->opened_mode != 'r')
{
$this->stream_seek(0,SEEK_END);
// we need to update the mime-type, size and content (if STORE2DB)
$values = array(
'fs_size' => $this->stream_tell(),
// todo: analyse the file for the mime-type
'fs_mime' => mime_magic::filename2mime($this->opened_path),
'fs_id' => $this->opened_fs_id,
'fs_modifier' => egw_vfs::$user,
'fs_modified' => self::_pdo_timestamp(time()),
);
if ($this->operation == self::STORE2FS)
{
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_size=:fs_size,fs_mime=:fs_mime,fs_modifier=:fs_modifier,fs_modified=:fs_modified WHERE fs_id=:fs_id');
if (!($ret = $stmt->execute($values)))
{
error_log(__METHOD__."() execute() failed! errorInfo()=".array2string(self::$pdo->errorInfo()));
}
}
else
{
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_size=:fs_size,fs_mime=:fs_mime,fs_modifier=:fs_modifier,fs_modified=:fs_modified,fs_content=:fs_content WHERE fs_id=:fs_id');
$this->stream_seek(0,SEEK_SET); // rewind to the start
foreach($values as $name => &$value)
{
$stmt->bindParam($name,$value);
}
$stmt->bindParam('fs_content', $this->opened_stream, PDO::PARAM_LOB);
if (!($ret = $stmt->execute()))
{
error_log(__METHOD__."() execute() failed! errorInfo()=".array2string(self::$pdo->errorInfo()));
}
}
}
$ret = fclose($this->opened_stream) && $ret;
unset(self::$stat_cache[$this->opened_path]);
$this->opened_stream = $this->opened_path = $this->opened_mode = $this->opend_fs_id = null;
$this->operation = self::DEFAULT_OPERATION;
return $ret;
}
/**
* This method is called in response to fread() and fgets() calls on the stream.
*
* You must return up-to count bytes of data from the current read/write position as a string.
* If there are less than count bytes available, return as many as are available.
* If no more data is available, return either FALSE or an empty string.
* You must also update the read/write position of the stream by the number of bytes that were successfully read.
*
* @param int $count
* @return string/false up to count bytes read or false on EOF
*/
function stream_read ( $count )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($count) pos=$this->opened_pos");
if (is_resource($this->opened_stream))
{
return fread($this->opened_stream,$count);
}
return false;
}
/**
* This method is called in response to fwrite() calls on the stream.
*
* You should store data into the underlying storage used by your stream.
* If there is not enough room, try to store as many bytes as possible.
* You should return the number of bytes that were successfully stored in the stream, or 0 if none could be stored.
* You must also update the read/write position of the stream by the number of bytes that were successfully written.
*
* @param string $data
* @return integer
*/
function stream_write ( $data )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($data)");
if (is_resource($this->opened_stream))
{
return fwrite($this->opened_stream,$data);
}
return false;
}
/**
* This method is called in response to feof() calls on the stream.
*
* Important: PHP 5.0 introduced a bug that wasn't fixed until 5.1: the return value has to be the oposite!
*
* if(version_compare(PHP_VERSION,'5.0','>=') && version_compare(PHP_VERSION,'5.1','<'))
* {
* $eof = !$eof;
* }
*
* @return boolean true if the read/write position is at the end of the stream and no more data availible, false otherwise
*/
function stream_eof ( )
{
if (is_resource($this->opened_stream))
{
return feof($this->opened_stream);
}
return false;
}
/**
* This method is called in response to ftell() calls on the stream.
*
* @return integer current read/write position of the stream
*/
function stream_tell ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
if (is_resource($this->opened_stream))
{
return ftell($this->opened_stream);
}
return false;
}
/**
* This method is called in response to fseek() calls on the stream.
*
* You should update the read/write position of the stream according to offset and whence.
* See fseek() for more information about these parameters.
*
* @param integer $offset
* @param integer $whence SEEK_SET - Set position equal to offset bytes
* SEEK_CUR - Set position to current location plus offset.
* 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.)
* @return boolean TRUE if the position was updated, FALSE otherwise.
*/
function stream_seek ( $offset, $whence )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($offset,$whence)");
if (is_resource($this->opened_stream))
{
return fseek($this->opened_stream,$offset,$whence);
}
return false;
}
/**
* This method is called in response to fflush() calls on the stream.
*
* If you have cached data in your stream but not yet stored it into the underlying storage, you should do so now.
*
* @return booelan TRUE if the cached data was successfully stored (or if there was no data to store), or FALSE if the data could not be stored.
*/
function stream_flush ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."()");
if (is_resource($this->opened_stream))
{
return fflush($this->opened_stream);
}
return false;
}
/**
* This method is called in response to fstat() calls on the stream.
*
* If you plan to use your wrapper in a require_once you need to define stream_stat().
* If you plan to allow any other tests like is_file()/is_dir(), you have to define url_stat().
* stream_stat() must define the size of the file, or it will never be included.
* url_stat() must define mode, or is_file()/is_dir()/is_executable(), and any of those functions affected by clearstatcache() simply won't work.
* It's not documented, but directories must be a mode like 040777 (octal), and files a mode like 0100666.
* If you wish the file to be executable, use 7s instead of 6s.
* The last 3 digits are exactly the same thing as what you pass to chmod.
* 040000 defines a directory, and 0100000 defines a file.
*
* @return array containing the same values as appropriate for the stream.
*/
function stream_stat ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($this->opened_path)");
return $this->url_stat($this->opened_path,0);
}
/**
* This method is called in response to unlink() calls on URL paths associated with the wrapper.
*
* It should attempt to delete the item specified by path.
* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support unlinking!
*
* @param string $url
* @return boolean TRUE on success or FALSE on failure
*/
static function unlink ( $url, $parent_stat=null )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url)");
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($path,STREAM_URL_STAT_LINK)) || !egw_vfs::check_access(egw_vfs::dirname($path),egw_vfs::WRITABLE, $parent_stat))
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."($url) permission denied!");
return false; // no permission or file does not exist
}
if ($stat['mime'] == self::DIR_MIME_TYPE)
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."($url) is NO file!");
return false; // no permission or file does not exist
}
$stmt = self::$pdo->prepare('DELETE FROM '.self::TABLE.' WHERE fs_id=:fs_id');
unset(self::$stat_cache[$path]);
if (($ret = $stmt->execute(array('fs_id' => $stat['ino']))))
{
if (self::url2operation($url) == self::STORE2FS &&
($stat['mode'] & self::MODE_LINK) != self::MODE_LINK)
{
unlink(self::_fs_path($stat['ino']));
}
// delete props
unset($stmt);
$stmt = self::$pdo->prepare('DELETE FROM '.self::PROPS_TABLE.' WHERE fs_id=?');
$stmt->execute(array($stat['ino']));
}
return $ret;
}
/**
* This method is called in response to rename() calls on URL paths associated with the wrapper.
*
* It should attempt to rename the item specified by path_from to the specification given by path_to.
* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support renaming.
*
* The regular filesystem stream-wrapper returns an error, if $url_from and $url_to are not either both files or both dirs!
*
* @param string $url_from
* @param string $url_to
* @param string $class=__CLASS__ class to use to call static methods, eg url_stat (workaround for no late static binding in php < 5.3)
* @todo remove $class parameter and use static::url_stat() and static::unlink() once we require PHP5.3!
* @return boolean TRUE on success or FALSE on failure
*/
static function rename ( $url_from, $url_to, $class=__CLASS__)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url_from,$url_to)");
$path_from = parse_url($url_from,PHP_URL_PATH);
$from_dir = egw_vfs::dirname($path_from);
$path_to = parse_url($url_to,PHP_URL_PATH);
$to_dir = egw_vfs::dirname($path_to);
$operation = self::url2operation($url_from);
// we have to use array($class,'url_stat'), as $class.'::url_stat' requires PHP 5.2.3 and we currently only require 5.2+
if (!($from_stat = call_user_func(array($class,'url_stat'),$path_from,0)) ||
!egw_vfs::check_access($from_dir,egw_vfs::WRITABLE,$from_dir_stat = call_user_func(array($class,'url_stat'),$from_dir,0)))
{
self::_remove_password($url_from);
self::_remove_password($url_to);
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $path_from permission denied!");
return false; // no permission or file does not exist
}
if (!egw_vfs::check_access($to_dir,egw_vfs::WRITABLE,$to_dir_stat = call_user_func(array($class,'url_stat'),$to_dir,0)))
{
self::_remove_password($url_from);
self::_remove_password($url_to);
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $path_to permission denied!");
return false; // no permission or parent-dir does not exist
}
// the filesystem stream-wrapper does NOT allow to rename files to directories, as this makes problems
// for our vfs too, we abort here with an error, like the filesystem one does
if (($to_stat = call_user_func(array($class,'url_stat'),$path_to,0)) &&
($to_stat['mime'] === self::DIR_MIME_TYPE) !== ($from_stat['mime'] === self::DIR_MIME_TYPE))
{
self::_remove_password($url_from);
self::_remove_password($url_to);
$is_dir = $to_stat['mime'] === self::DIR_MIME_TYPE ? 'a' : 'no';
if (self::LOG_LEVEL) error_log(__METHOD__."($url_to,$url_from) $path_to is $is_dir directory!");
return false; // no permission or file does not exist
}
// if destination file already exists, delete it
if ($to_stat && !call_user_func(array($class,'unlink'),$url_to,$operation))
{
self::_remove_password($url_to);
if (self::LOG_LEVEL) error_log(__METHOD__."($url_to,$url_from) can't unlink existing $url_to!");
return false;
}
unset(self::$stat_cache[$path_from]);
unset(self::$stat_cache[$path_to]);
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_dir=:fs_dir,fs_name=:fs_name WHERE fs_dir=:old_dir AND fs_name=:old_name');
$ok = $stmt->execute(array(
'fs_dir' => $to_dir_stat['ino'],
'fs_name' => egw_vfs::basename($path_to),
'old_dir' => $from_dir_stat['ino'],
'old_name' => $from_stat['name'],
));
unset($stmt);
// check if extension changed and update mime-type in that case (as we currently determine mime-type by it's extension!)
// fixes eg. problems with MsWord storing file with .tmp extension and then renaming to .doc
if ($ok && ($new_mime = egw_vfs::mime_content_type($url_to,true)) != egw_vfs::mime_content_type($url_to))
{
//echo "<p>egw_vfs::nime_content_type($url_to,true) = $new_mime</p>\n";
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_mime=:fs_mime WHERE fs_id=:fs_id');
$stmt->execute(array(
'fs_mime' => $new_mime,
'fs_id' => $from_stat['ino'],
));
unset(self::$stat_cache[$path_to]);
}
return $ok;
}
/**
* due to problems with recursive directory creation, we have our own here
*/
private static function mkdir_recursive($pathname, $mode, $depth=0)
{
$maxdepth=10;
$depth2propagate = (int)$depth + 1;
if ($depth2propagate > $maxdepth) return is_dir($pathname);
is_dir(egw_vfs::dirname($pathname)) || self::mkdir_recursive(egw_vfs::dirname($pathname), $mode, $depth2propagate);
return is_dir($pathname) || @mkdir($pathname, $mode);
}
/**
* This method is called in response to mkdir() calls on URL paths associated with the wrapper.
*
* It should attempt to create the directory specified by path.
* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support creating directories.
*
* @param string $url
* @param int $mode
* @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
* @return boolean TRUE on success or FALSE on failure
*/
static function mkdir ( $url, $mode, $options )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$mode,$options)");
if (self::LOG_LEVEL > 1) error_log(__METHOD__." called from:".function_backtrace());
$path = parse_url($url,PHP_URL_PATH);
if (self::url_stat($path,STREAM_URL_STAT_QUIET))
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."('$url',$mode,$options) already exist!");
if (!($options & STREAM_REPORT_ERRORS))
{
//throw new Exception(__METHOD__."('$url',$mode,$options) already exist!");
trigger_error(__METHOD__."('$url',$mode,$options) already exist!",E_USER_WARNING);
}
return false;
}
$parent_path = egw_vfs::dirname($path);
if (($query = parse_url($url,PHP_URL_QUERY))) $parent_path .= '?'.$query;
$parent = self::url_stat($parent_path,STREAM_URL_STAT_QUIET);
// check if we should also create all non-existing path components and our parent does not exist,
// if yes call ourself recursive with the parent directory
if (($options & STREAM_MKDIR_RECURSIVE) && $parent_path != '/' && !$parent)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__." creating parents: $parent_path, $mode");
if (!self::mkdir($parent_path,$mode,$options))
{
return false;
}
$parent = self::url_stat($parent_path,0);
}
if (!$parent || !egw_vfs::check_access($parent_path,egw_vfs::WRITABLE,$parent))
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."('$url',$mode,$options) permission denied!");
if (!($options & STREAM_REPORT_ERRORS))
{
trigger_error(__METHOD__."('$url',$mode,$options) permission denied!",E_USER_WARNING);
}
return false; // no permission or file does not exist
}
unset(self::$stat_cache[$path]);
$stmt = self::$pdo->prepare('INSERT INTO '.self::TABLE.' (fs_name,fs_dir,fs_mode,fs_uid,fs_gid,fs_size,fs_mime,fs_created,fs_modified,fs_creator'.
') VALUES (:fs_name,:fs_dir,:fs_mode,:fs_uid,:fs_gid,:fs_size,:fs_mime,:fs_created,:fs_modified,:fs_creator)');
if (($ok = $stmt->execute(array(
'fs_name' => egw_vfs::basename($path),
'fs_dir' => $parent['ino'],
'fs_mode' => $parent['mode'],
'fs_uid' => $parent['uid'],
'fs_gid' => $parent['gid'],
'fs_size' => 0,
'fs_mime' => self::DIR_MIME_TYPE,
'fs_created' => self::_pdo_timestamp(time()),
'fs_modified' => self::_pdo_timestamp(time()),
'fs_creator' => egw_vfs::$user,
))))
{
// check if some other process created the directory parallel to us (sqlfs would gives SQL errors later!)
$new_fs_id = self::$pdo->lastInsertId('egw_sqlfs_fs_id_seq');
unset($stmt); // free statement object, on some installs a new prepare fails otherwise!
$stmt = self::$pdo->prepare($q='SELECT COUNT(*) FROM '.self::TABLE.
' WHERE fs_dir=:fs_dir AND fs_active=:fs_active AND fs_name'.self::$case_sensitive_equal.':fs_name');
if ($stmt->execute(array(
'fs_dir' => $parent['ino'],
'fs_active' => self::_pdo_boolean(true),
'fs_name' => egw_vfs::basename($path),
)) && $stmt->fetchColumn() > 1) // if there's more then one --> remove our new dir
{
self::$pdo->query('DELETE FROM '.self::TABLE.' WHERE fs_id='.$new_fs_id);
}
}
return $ok;
}
/**
* This method is called in response to rmdir() calls on URL paths associated with the wrapper.
*
* It should attempt to remove the directory specified by path.
* In order for the appropriate error message to be returned, do not define this method if your wrapper does not support removing directories.
*
* @param string $url
* @param int $options Possible values include STREAM_REPORT_ERRORS.
* @return boolean TRUE on success or FALSE on failure.
*/
static function rmdir ( $url, $options )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url)");
$path = parse_url($url,PHP_URL_PATH);
$parent = egw_vfs::dirname($path);
if (!($stat = self::url_stat($path,0)) || $stat['mime'] != self::DIR_MIME_TYPE ||
!egw_vfs::check_access($parent,egw_vfs::WRITABLE))
{
self::_remove_password($url);
$err_msg = __METHOD__."($url,$options) ".(!$stat ? 'not found!' :
($stat['mime'] != self::DIR_MIME_TYPE ? 'not a directory!' : 'permission denied!'));
if (self::LOG_LEVEL) error_log($err_msg);
if (!($options & STREAM_REPORT_ERRORS))
{
trigger_error($err_msg,E_USER_WARNING);
}
return false; // no permission or file does not exist
}
$stmt = self::$pdo->prepare('SELECT COUNT(*) FROM '.self::TABLE.' WHERE fs_dir=?');
$stmt->execute(array($stat['ino']));
if ($stmt->fetchColumn())
{
self::_remove_password($url);
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$options) dir is not empty!");
if (!($options & STREAM_REPORT_ERRORS))
{
trigger_error(__METHOD__."('$url',$options) dir is not empty!",E_USER_WARNING);
}
return false;
}
unset(self::$stat_cache[$path]);
unset($stmt); // free statement object, on some installs a new prepare fails otherwise!
$stmt = self::$pdo->prepare('DELETE FROM '.self::TABLE.' WHERE fs_id=?');
if (($ret = $stmt->execute(array($stat['ino']))))
{
self::eacl($path,null,false,$stat['ino']); // remove all (=false) evtl. existing extended acl for that dir
// delete props
unset($stmt);
$stmt = self::$pdo->prepare('DELETE FROM '.self::PROPS_TABLE.' WHERE fs_id=?');
$stmt->execute(array($stat['ino']));
}
return $ret;
}
/**
* This is not (yet) a stream-wrapper function, but it's necessary and can be used static
*
* @param string $url
* @param int $time=null modification time (unix timestamp), default null = current time
* @param int $atime=null access time (unix timestamp), default null = current time, not implemented in the vfs!
*/
static function touch($url,$time=null,$atime=null)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url)");
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($path,STREAM_URL_STAT_QUIET)))
{
// file does not exist --> create an empty one
if (!($f = fopen(self::SCHEME.'://default'.$path,'w')) || !fclose($f))
{
return false;
}
if (is_null($time))
{
return true; // new (empty) file created with current mod time
}
$stat = self::url_stat($path,0);
}
unset(self::$stat_cache[$path]);
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_modified=:fs_modified,fs_modifier=:fs_modifier WHERE fs_id=:fs_id');
return $stmt->execute(array(
'fs_modified' => self::_pdo_timestamp($time ? $time : time()),
'fs_modifier' => egw_vfs::$user,
'fs_id' => $stat['ino'],
));
}
/**
* Chown command, not yet a stream-wrapper function, but necessary
*
* @param string $url
* @param int $owner
* @return boolean
*/
static function chown($url,$owner)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$owner)");
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($path,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no such file or directory!");
trigger_error("No such file or directory $url !",E_USER_WARNING);
return false;
}
if (!egw_vfs::$is_root)
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) only root can do that!");
trigger_error("Only root can do that!",E_USER_WARNING);
return false;
}
if ($owner < 0 || $owner && !$GLOBALS['egw']->accounts->id2name($owner)) // not a user (0 == root)
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) unknown (numeric) user id!");
trigger_error(__METHOD__."($url,$owner) Unknown (numeric) user id!",E_USER_WARNING);
//throw new Exception(__METHOD__."($url,$owner) Unknown (numeric) user id!");
return false;
}
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_uid=:fs_uid WHERE fs_id=:fs_id');
return $stmt->execute(array(
'fs_uid' => (int) $owner,
'fs_id' => $stat['ino'],
));
}
/**
* Chgrp command, not yet a stream-wrapper function, but necessary
*
* @param string $url
* @param int $group
* @return boolean
*/
static function chgrp($url,$owner)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$owner)");
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($path,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no such file or directory!");
trigger_error("No such file or directory $url !",E_USER_WARNING);
return false;
}
if (!egw_vfs::has_owner_rights($path,$stat))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) only owner or root can do that!");
trigger_error("Only owner or root can do that!",E_USER_WARNING);
return false;
}
if ($owner < 0) $owner = -$owner; // sqlfs uses a positiv group id's!
if ($owner && !$GLOBALS['egw']->accounts->id2name(-$owner)) // not a group
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) unknown (numeric) group id!");
trigger_error("Unknown (numeric) group id!",E_USER_WARNING);
return false;
}
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_gid=:fs_gid WHERE fs_id=:fs_id');
return $stmt->execute(array(
'fs_gid' => $owner,
'fs_id' => $stat['ino'],
));
}
/**
* Chmod command, not yet a stream-wrapper function, but necessary
*
* @param string $url
* @param int $mode
* @return boolean
*/
static function chmod($url,$mode)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$owner)");
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($path,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no such file or directory!");
trigger_error("No such file or directory $url !",E_USER_WARNING);
return false;
}
if (!egw_vfs::has_owner_rights($path,$stat))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) only owner or root can do that!");
trigger_error("Only owner or root can do that!",E_USER_WARNING);
return false;
}
if (!is_numeric($mode)) // not a mode
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no (numeric) mode!");
trigger_error("No (numeric) mode!",E_USER_WARNING);
return false;
}
$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_mode=:fs_mode WHERE fs_id=:fs_id');
return $stmt->execute(array(
'fs_mode' => ((int) $mode) & 0777, // we dont store the file and dir bits, give int overflow!
'fs_id' => $stat['ino'],
));
}
/**
* This method is called immediately when your stream object is created for examining directory contents with opendir().
*
* @param string $path URL that was passed to opendir() and that this object is expected to explore.
* @param $options
* @return booelan
*/
function dir_opendir ( $url, $options )
{
$this->opened_dir = null;
$path = parse_url($url,PHP_URL_PATH);
if (!($stat = self::url_stat($url,0)) || // dir not found
$stat['mime'] != self::DIR_MIME_TYPE || // no dir
!egw_vfs::check_access($url,egw_vfs::EXECUTABLE|egw_vfs::READABLE,$stat)) // no access
{
self::_remove_password($url);
$msg = $stat['mime'] != self::DIR_MIME_TYPE ? "$url is no directory" : 'permission denied';
if (self::LOG_LEVEL) error_log(__METHOD__."('$url',$options) $msg!");
$this->opened_dir = null;
return false;
}
$this->opened_dir = array();
$query = 'SELECT fs_id,fs_name,fs_mode,fs_uid,fs_gid,fs_size,fs_mime,fs_created,fs_modified'.self::$extra_columns.
' FROM '.self::TABLE.' WHERE fs_dir=? AND fs_active='.self::_pdo_boolean(true).
" ORDER BY fs_mime='httpd/unix-directory' DESC, fs_name ASC";
//if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__."($url,$options)".' */ '.$query;
$stmt = self::$pdo->prepare($query);
$stmt->setFetchMode(PDO::FETCH_ASSOC);
if ($stmt->execute(array($stat['ino'])))
{
foreach($stmt as $file)
{
$this->opened_dir[] = $file['fs_name'];
self::$stat_cache[egw_vfs::concat($path,$file['fs_name'])] = $file;
}
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$options): ".implode(', ',$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.
* stat triggers it's own warning anyway, so it makes no sense to trigger one by our stream-wrapper!
* @param boolean $eacl_access=null allows extending classes to pass the value of their check_extended_acl() method (no lsb!)
* @return array
*/
static function url_stat ( $url, $flags, $eacl_access=null )
{
static $max_subquery_depth;
if (is_null($max_subquery_depth))
{
$max_subquery_depth = $GLOBALS['egw_info']['server']['max_subquery_depth'];
if (!$max_subquery_depth) $max_subquery_depth = 7; // setting current default of 7, if nothing set
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$url',$flags,$eacl_access)");
$path = parse_url($url,PHP_URL_PATH);
// webdav adds a trailing slash to dirs, which causes url_stat to NOT find the file otherwise
if ($path != '/' && substr($path,-1) == '/')
{
$path = substr($path,0,-1);
}
if (empty($path))
{
return false; // is invalid and gives sql error
}
// check if we already have the info from the last dir_open call, as the old vfs reads it anyway from the db
if (self::$stat_cache && isset(self::$stat_cache[$path]) && (is_null($eacl_access) || self::$stat_cache[$path] !== false))
{
return self::$stat_cache[$path] ? self::_vfsinfo2stat(self::$stat_cache[$path]) : false;
}
if (!is_object(self::$pdo))
{
self::_pdo();
}
$base_query = 'SELECT fs_id,fs_name,fs_mode,fs_uid,fs_gid,fs_size,fs_mime,fs_created,fs_modified'.self::$extra_columns.
' FROM '.self::TABLE.' WHERE fs_active='.self::_pdo_boolean(true).
' AND fs_name'.self::$case_sensitive_equal.'? AND fs_dir=';
$parts = explode('/',$path);
// if we have extendes acl access to the url, we dont need and can NOT include the sql for the readable check
if (is_null($eacl_access))
{
$eacl_access = self::check_extended_acl($path,egw_vfs::READABLE); // should be static::check_extended_acl, but no lsb!
}
try {
foreach($parts as $n => $name)
{
if ($n == 0)
{
$query = (int) ($path != '/'); // / always has fs_id == 1, no need to query it ($path=='/' needs fs_dir=0!)
}
elseif ($n < count($parts)-1)
{
// MySQL 5.0 has a nesting limit for subqueries
// --> we replace the so far cumulated subqueries with their result
// no idea about the other DBMS, but this does NOT hurt ...
// --> depth limit of subqueries is now dynamicly decremented in catch
if ($n > 1 && !(($n-1) % $max_subquery_depth) && !($query = self::$pdo->query($query)->fetchColumn()))
{
if (self::LOG_LEVEL > 1)
{
self::_remove_password($url);
error_log(__METHOD__."('$url',$flags) file or directory not found!");
}
// we also store negatives (all methods creating new files/dirs have to unset the stat-cache!)
return self::$stat_cache[$path] = false;
}
$query = 'SELECT fs_id FROM '.self::TABLE.' WHERE fs_dir=('.$query.') AND fs_active='.
self::_pdo_boolean(true).' AND fs_name'.self::$case_sensitive_equal.self::$pdo->quote($name);
// if we are not root AND have no extended acl access, we need to make sure the user has the right to tranverse all parent directories (read-rights)
if (!egw_vfs::$is_root && !$eacl_access)
{
if (!egw_vfs::$user)
{
self::_remove_password($url);
if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$url',$flags) permission denied, no user-id and not root!");
return false;
}
$query .= ' AND '.self::_sql_readable();
}
}
else
{
$query = str_replace('fs_name'.self::$case_sensitive_equal.'?','fs_name'.self::$case_sensitive_equal.self::$pdo->quote($name),$base_query).'('.$query.')';
}
}
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__."($url,$flags,$eacl_access)".' */ '.$query;
//if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
if (!($result = self::$pdo->query($query)) || !($info = $result->fetch(PDO::FETCH_ASSOC)))
{
if (self::LOG_LEVEL > 1)
{
self::_remove_password($url);
error_log(__METHOD__."('$url',$flags) file or directory not found!");
}
// we also store negatives (all methods creating new files/dirs have to unset the stat-cache!)
return self::$stat_cache[$path] = false;
}
}
catch (PDOException $e) {
// decrement subquery limit by 1 and try again, if not already smaller then 3
if ($max_subquery_depth < 3)
{
throw new egw_exception_db($e->getMessage());
}
$GLOBALS['egw_info']['server']['max_subquery_depth'] = --$max_subquery_depth;
error_log(__METHOD__."() decremented max_subquery_depth to $max_subquery_depth");
config::save_value('max_subquery_depth', $max_subquery_depth, 'phpgwapi');
if (method_exists($GLOBALS['egw'],'invalidate_session_cache')) $GLOBALS['egw']->invalidate_session_cache();
return self::url_stat($url, $flags, $eacl_access);
}
self::$stat_cache[$path] = $info;
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$flags)=".array2string($info));
return self::_vfsinfo2stat($info);
}
/**
* Return readable check as sql (to be AND'ed into the query), only use if !egw_vfs::$is_root
*
* @return string
*/
protected function _sql_readable()
{
static $sql_read_acl;
if (is_null($sql_read_acl))
{
foreach($GLOBALS['egw']->accounts->memberships(egw_vfs::$user,true) as $gid)
{
$memberships[] = abs($gid); // sqlfs stores the gid's positiv
}
// using octal numbers with mysql leads to funny results (select 384 & 0400 --> 384 not 256=0400)
// 256 = 0400, 32 = 040
$sql_read_acl = '((fs_mode & 4)=4 OR (fs_mode & 256)=256 AND fs_uid='.(int)egw_vfs::$user.
($memberships ? ' OR (fs_mode & 32)=32 AND fs_gid IN('.implode(',',$memberships).')' : '').')';
//error_log(__METHOD__."() egw_vfs::\$user=".array2string(egw_vfs::$user).' --> memberships='.array2string($memberships).' --> '.$sql_read_acl.($memberships?'':': '.function_backtrace()));
}
return $sql_read_acl;
}
/**
* This method is called in response to readdir().
*
* It should return a string representing the next filename in the location opened by dir_opendir().
*
* @return string
*/
function dir_readdir ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."( )");
if (!is_array($this->opened_dir)) return false;
$file = current($this->opened_dir); next($this->opened_dir);
return $file;
}
/**
* This method is called in response to rewinddir().
*
* It should reset the output generated by dir_readdir(). i.e.:
* The next call to dir_readdir() should return the first entry in the location returned by dir_opendir().
*
* @return boolean
*/
function dir_rewinddir ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."( )");
if (!is_array($this->opened_dir)) return false;
reset($this->opened_dir);
return true;
}
/**
* This method is called in response to closedir().
*
* You should release any resources which were locked or allocated during the opening and use of the directory stream.
*
* @return boolean
*/
function dir_closedir ( )
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."( )");
if (!is_array($this->opened_dir)) return false;
$this->opened_dir = null;
return true;
}
/**
* This method is called in response to readlink().
*
* The readlink value is read by url_stat or dir_opendir and therefore cached in the stat-cache.
*
* @param string $url
* @return string|boolean content of the symlink or false if $url is no symlink (or not found)
*/
static function readlink($path)
{
$link = !($lstat = self::url_stat($path,STREAM_URL_STAT_LINK)) || is_null($lstat['readlink']) ? false : $lstat['readlink'];
if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$path') = $link");
return $link;
}
/**
* Method called for symlink()
*
* @param string $target
* @param string $link
* @return boolean true on success false on error
*/
static function symlink($target,$link)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$target','$link')");
if (self::url_stat($link,0) || !($dir = egw_vfs::dirname($link)) ||
!egw_vfs::check_access($dir,egw_vfs::WRITABLE,$dir_stat=self::url_stat($dir,0)))
{
if (self::LOG_LEVEL > 0) error_log(__METHOD__."('$target','$link') returning false! (!stat('$link') || !is_writable('$dir'))");
return false; // $link already exists or parent dir does not
}
$query = 'INSERT INTO '.self::TABLE.' (fs_name,fs_dir,fs_mode,fs_uid,fs_gid,fs_created,fs_modified,fs_creator,fs_mime,fs_size,fs_link'.
') VALUES (:fs_name,:fs_dir,:fs_mode,:fs_uid,:fs_gid,:fs_created,:fs_modified,:fs_creator,:fs_mime,:fs_size,:fs_link)';
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
$stmt = self::$pdo->prepare($query);
unset(self::$stat_cache[parse_url($link,PHP_URL_PATH)]);
return !!$stmt->execute(array(
'fs_name' => egw_vfs::basename($link),
'fs_dir' => $dir_stat['ino'],
'fs_mode' => ($dir_stat['mode'] & 0666),
'fs_uid' => $dir_stat['uid'] ? $dir_stat['uid'] : egw_vfs::$user,
'fs_gid' => $dir_stat['gid'],
'fs_created' => self::_pdo_timestamp(time()),
'fs_modified' => self::_pdo_timestamp(time()),
'fs_creator' => egw_vfs::$user,
'fs_mime' => self::SYMLINK_MIME_TYPE,
'fs_size' => bytes($target),
'fs_link' => $target,
));
}
private static $extended_acl;
/**
* Check if extendes ACL (stored in eGW's ACL table) grants access
*
* The extended ACL is inherited, so it's valid for all subdirs and the included files!
* The used algorithm break on the first match. It could be used, to disallow further access.
*
* @param string $url url to check
* @param int $check mode to check: one or more or'ed together of: 4 = read, 2 = write, 1 = executable
* @return boolean
*/
static function check_extended_acl($url,$check)
{
$url_path = parse_url($url,PHP_URL_PATH);
if (is_null(self::$extended_acl))
{
self::_read_extended_acl();
}
$access = false;
foreach(self::$extended_acl as $path => $rights)
{
if ($path == $url_path || substr($url_path,0,strlen($path)+1) == $path.'/')
{
$access = ($rights & $check) == $check;
break;
}
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$check) ".($access?"access granted by $path=$rights":'no access!!!'));
return $access;
}
/**
* Read the extended acl via acl::get_grants('sqlfs')
*
*/
static protected function _read_extended_acl()
{
if ((self::$extended_acl = $GLOBALS['egw']->session->appsession('extended_acl',self::EACL_APPNAME)) != false)
{
return; // ext. ACL read from session.
}
self::$extended_acl = array();
if (($rights = $GLOBALS['egw']->acl->get_all_location_rights(egw_vfs::$user,self::EACL_APPNAME)))
{
$pathes = self::id2path(array_keys($rights));
}
foreach($rights as $fs_id => $right)
{
$path = $pathes[$fs_id];
if (isset($path))
{
self::$extended_acl[$path] = (int)$right;
}
}
// sort by length descending, to allow more specific pathes to have precedence
uksort(self::$extended_acl,create_function('$a,$b','return strlen($b)-strlen($a);'));
$GLOBALS['egw']->session->appsession('extended_acl',self::EACL_APPNAME,self::$extended_acl);
if (self::LOG_LEVEL > 1) error_log(__METHOD__.'() '.array2string(self::$extended_acl));
}
/**
* Appname used with the acl class to store the extended acl
*/
const EACL_APPNAME = 'sqlfs';
/**
* Set or delete extended acl for a given path and owner (or delete them if is_null($rights)
*
* Only root, the owner of the path or an eGW admin (only if there's no owner but a group) are allowd to set eACL's!
*
* @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
* @param int $fs_id=null fs_id to use, to not query it again (eg. because it's already deleted)
* @return boolean true if acl is set/deleted, false on error
*/
static function eacl($path,$rights=null,$owner=null,$fs_id=null)
{
if ($path[0] != '/')
{
$path = parse_url($path,PHP_URL_PATH);
}
if (is_null($fs_id))
{
if (!($stat = self::url_stat($path,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($path,$rights,$owner,$fs_id) no such file or directory!");
return false; // $path not found
}
if (!egw_vfs::has_owner_rights($path,$stat)) // not group dir and user is eGW admin
{
if (self::LOG_LEVEL) error_log(__METHOD__."($path,$rights,$owner,$fs_id) permission denied!");
return false; // permission denied
}
$fs_id = $stat['ino'];
}
if (is_null($owner))
{
$owner = egw_vfs::$user;
}
if (is_null($rights) || $owner === false)
{
// delete eacl
if (is_null($owner) || $owner == egw_vfs::$user ||
$owner < 0 && egw_vfs::$user && in_array($owner,$GLOBALS['egw']->accounts->memberships(egw_vfs::$user,true)))
{
self::$extended_acl = null; // force new read of eACL, as there could be multiple eACL for that path
}
$ret = $GLOBALS['egw']->acl->delete_repository(self::EACL_APPNAME,$fs_id,(int)$owner);
}
else
{
if (isset(self::$extended_acl) && ($owner == egw_vfs::$user ||
$owner < 0 && egw_vfs::$user && in_array($owner,$GLOBALS['egw']->accounts->memberships(egw_vfs::$user,true))))
{
// set rights for this class, if applicable
self::$extended_acl[$path] |= $rights;
}
$ret = $GLOBALS['egw']->acl->add_repository(self::EACL_APPNAME,$fs_id,$owner,$rights);
}
if ($ret)
{
$GLOBALS['egw']->session->appsession('extended_acl',self::EACL_APPNAME,self::$extended_acl);
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($path,$rights,$owner,$fs_id)=".(int)$ret);
return $ret;
}
/**
* 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 $path not found
*/
function get_eacl($path)
{
if (!($stat = self::url_stat($_path=$path,STREAM_URL_STAT_QUIET)))
{
error_log(__METHOD__.__LINE__.' '.array2string($path).' not found!');
return false; // not found
}
$eacls = array();
foreach($GLOBALS['egw']->acl->get_all_rights($stat['ino'],self::EACL_APPNAME) as $owner => $rights)
{
$eacls[] = array(
'path' => $path,
'owner' => $owner,
'rights' => $rights,
'ino' => $stat['ino'],
);
}
if (($path = egw_vfs::dirname($path)))
{
$eacls = array_merge((array)self::get_eacl($path),$eacls);
}
// sort by length descending, to show precedence
usort($eacls,create_function('$a,$b','return strlen($b["path"])-strlen($a["path"]);'));
//error_log(__METHOD__."('$_path') returning ".array2string($eacls));
return $eacls;
}
/**
* Return the path of given fs_id(s)
*
* Searches the stat_cache first and then the db.
* Calls itself recursive to to determine the path of the parent/directory
*
* @param int|array $fs_ids integer fs_id or array of them
* @return string|array path or array or pathes indexed by fs_id
*/
static function id2path($fs_ids)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($fs_id).')');
$ids = (array)$fs_ids;
$pathes = array();
// first check our stat-cache for the ids
foreach(self::$stat_cache as $path => $stat)
{
if (($key = array_search($stat['fs_id'],$ids)) !== false)
{
$pathes[$stat['fs_id']] = $path;
unset($ids[$key]);
if (!$ids)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($fs_ids).')='.array2string($pathes).' *from stat_cache*');
return is_array($fs_ids) ? $pathes : array_shift($pathes);
}
}
}
// now search via the database
if (count($ids) > 1) array_map(create_function('&$v','$v = (int)$v;'),$ids);
$query = 'SELECT fs_id,fs_dir,fs_name FROM '.self::TABLE.' WHERE fs_id'.
(count($ids) == 1 ? '='.(int)$ids[0] : ' IN ('.implode(',',$ids).')');
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
if (!is_object(self::$pdo))
{
self::_pdo();
}
$stmt = self::$pdo->prepare($query);
$stmt->setFetchMode(PDO::FETCH_ASSOC);
if (!$stmt->execute())
{
return false; // not found
}
$parents = array();
foreach($stmt as $row)
{
if ($row['fs_dir'] > 1 && !in_array($row['fs_dir'],$parents))
{
$parents[] = $row['fs_dir'];
}
$rows[$row['fs_id']] = $row;
}
unset($stmt);
if ($parents && !($parents = self::id2path($parents)))
{
return false; // parent not found, should never happen ...
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__." trying foreach with:".print_r($rows,true)."#");
foreach((array)$rows as $fs_id => $row)
{
$parent = $row['fs_dir'] > 1 ? $parents[$row['fs_dir']] : '';
$pathes[$fs_id] = $parent . '/' . $row['fs_name'];
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__.'('.array2string($fs_ids).')='.array2string($pathes));
return is_array($fs_ids) ? $pathes : array_shift($pathes);
}
/**
* Convert a sqlfs-file-info into a stat array
*
* @param array $info
* @return array
*/
static protected function _vfsinfo2stat($info)
{
$stat = array(
'ino' => $info['fs_id'],
'name' => $info['fs_name'],
'mode' => $info['fs_mode'] |
($info['fs_mime'] == self::DIR_MIME_TYPE ? self::MODE_DIR :
($info['fs_mime'] == self::SYMLINK_MIME_TYPE ? self::MODE_LINK : self::MODE_FILE)), // required by the stream wrapper
'size' => $info['fs_size'],
'uid' => $info['fs_uid'],
'gid' => $info['fs_gid'],
'mtime' => strtotime($info['fs_modified']),
'ctime' => strtotime($info['fs_created']),
'nlink' => $info['fs_mime'] == self::DIR_MIME_TYPE ? 2 : 1,
// eGW addition to return some extra values
'mime' => $info['fs_mime'],
'readlink' => $info['fs_link'],
);
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($info[name]) = ".array2string($stat));
return $stat;
}
public static $pdo_type;
/**
* Case sensitive comparison operator, for mysql we use ' COLLATE utf8_bin ='
*
* @var string
*/
public static $case_sensitive_equal = '=';
/**
* Create pdo object / connection, as long as pdo is not generally used in eGW
*
* @return PDO
*/
static protected function _pdo()
{
$egw_db = isset($GLOBALS['egw_setup']) ? $GLOBALS['egw_setup']->db : $GLOBALS['egw']->db;
switch($egw_db->Type)
{
case 'mysqli':
case 'mysqlt':
case 'mysql':
self::$case_sensitive_equal = '= BINARY ';
self::$pdo_type = 'mysql';
break;
default:
self::$pdo_type = $egw_db->Type;
break;
}
switch($type)
{
default:
$dsn = self::$pdo_type.':dbname='.$egw_db->Database.($egw_db->Host ? ';host='.$egw_db->Host.($egw_db->Port ? ';port='.$egw_db->Port : '') : '');
break;
}
// check once if pdo extension and DB specific driver is loaded or can be loaded
static $pdo_available;
if (is_null($pdo_available))
{
foreach(array('pdo','pdo_'.self::$pdo_type) as $ext)
{
check_load_extension($ext,true); // true = throw Exception
}
$pdo_available = true;
}
try {
self::$pdo = new PDO($dsn,$egw_db->User,$egw_db->Password,array(
PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION,
));
} catch(Exception $e) {
// Exception reveals password, so we ignore the exception and connect again without pw, to get the right exception without pw
self::$pdo = new PDO($dsn,$egw_db->User,'$egw_db->Password');
}
// set client charset of the connection
$charset = translation::charset();
switch(self::$pdo_type)
{
case 'mysql':
if (isset($egw_db->Link_ID->charset2mysql[$charset])) $charset = $egw_db->Link_ID->charset2mysql[$charset];
// fall throught
case 'pgsql':
$query = "SET NAMES '$charset'";
break;
}
if ($query)
{
self::$pdo->exec($query);
}
return self::$pdo;
}
/**
* Just a little abstration 'til I know how to organise stuff like that with PDO
*
* @param mixed $time
* @return string Y-m-d H:i:s
*/
static protected function _pdo_timestamp($time)
{
if (is_numeric($time))
{
$time = date('Y-m-d H:i:s',$time);
}
return $time;
}
/**
* Just a little abstration 'til I know how to organise stuff like that with PDO
*
* @param boolean $val
* @return string '1' or '0' for mysql, 'true' or 'false' for everyone else
*/
static protected function _pdo_boolean($val)
{
if (self::$pdo_type == 'mysql')
{
return $val ? '1' : '0';
}
return $val ? 'true' : 'false';
}
/**
* Maximum value for a single hash element (should be 10^N): 10, 100 (default), 1000, ...
*
* DONT change this value, once you have files stored, they will no longer be found!
*/
const HASH_MAX = 100;
/**
* Return the path of the stored content of a file if $this->operation == self::STORE2FS
*
* To limit the number of files stored in one directory, we create a hash from the fs_id:
* 1 --> /00/1
* 34 --> /00/34
* 123 --> /01/123
* 4567 --> /45/4567
* 99999 --> /09/99/99999
* --> so one directory contains maximum 2 * HASH_MAY entries (HASH_MAX dirs + HASH_MAX files)
* @param int $id id of the file
* @return string
*/
static function _fs_path($id)
{
if (!is_numeric($id))
{
throw new egw_exception_wrong_parameter(__METHOD__."(id=$id) id has to be an integer!");
}
if (!isset($GLOBALS['egw_info']['server']['files_dir']))
{
if (is_object($GLOBALS['egw_setup']->db)) // if we run under setup, query the db for the files dir
{
$GLOBALS['egw_info']['server']['files_dir'] = $GLOBALS['egw_setup']->db->select('egw_config','config_value',array(
'config_name' => 'files_dir',
'config_app' => 'phpgwapi',
),__LINE__,__FILE__)->fetchColumn();
}
}
if (!$GLOBALS['egw_info']['server']['files_dir'])
{
throw new egw_exception_assertion_failed("\$GLOBALS['egw_info']['server']['files_dir'] not set!");
}
$hash = array();
for ($n = $id; $n = (int) ($n / self::HASH_MAX); )
{
$hash[] = sprintf('%02d',$n % self::HASH_MAX);
}
if (!$hash) $hash[] = '00'; // we need at least one directory, to not conflict with the dir-names
array_unshift($hash,$id);
$path = '/sqlfs/'.implode('/',array_reverse($hash));
//error_log(__METHOD__."($id) = '$path'");
return $GLOBALS['egw_info']['server']['files_dir'].$path;
}
/**
* Replace the password of an url with '...' for error messages
*
* @param string &$url
*/
static protected function _remove_password(&$url)
{
$parts = parse_url($url);
if ($parts['pass'] || $parts['scheme'])
{
$url = $parts['scheme'].'://'.($parts['user'] ? $parts['user'].($parts['pass']?':...':'').'@' : '').
$parts['host'].$parts['path'];
}
}
/**
* Get storage mode from url (get parameter 'storage', eg. ?storage=db)
*
* @param string|array $url complete url or array of url-parts from parse_url
* @return int self::STORE2FS or self::STORE2DB
*/
static function url2operation($url)
{
$operation = self::DEFAULT_OPERATION;
if (strpos(is_array($url) ? $url['query'] : $url,'storage=') !== false)
{
parse_str(is_array($url) ? $url['query'] : parse_url($url,PHP_URL_QUERY),$query);
switch ($query['storage'])
{
case 'db':
$operation = self::STORE2DB;
break;
case 'fs':
default:
$operation = self::STORE2FS;
break;
}
}
//error_log(__METHOD__."('$url') = $operation (1=DB, 2=FS)");
return $operation;
}
/**
* Store properties for a single ressource (file or dir)
*
* @param string|int $path string with path or integer fs_id
* @param array $props array of array with values for keys 'name', 'ns', 'val' (null to delete the prop)
* @return boolean true if props are updated, false otherwise (eg. ressource not found)
*/
static function proppatch($path,array $props)
{
if (self::LOG_LEVEL > 1) error_log(__METHOD__."(".array2string($path).','.array2string($props));
if (!is_numeric($path))
{
if (!($stat = self::url_stat($path,0)))
{
return false;
}
$id = $stat['ino'];
}
elseif(!($path = self::id2path($id=$path)))
{
return false;
}
if (!egw_vfs::check_access($path,EGW_ACL_EDIT,$stat))
{
return false; // permission denied
}
foreach($props as &$prop)
{
if (!isset($prop['ns'])) $prop['ns'] = egw_vfs::DEFAULT_PROP_NAMESPACE;
if (!isset($prop['val']) || self::$pdo_type != 'mysql') // for non mysql, we have to delete the prop anyway, as there's no REPLACE!
{
if (!isset($del_stmt))
{
$del_stmt = self::$pdo->prepare('DELETE FROM '.self::PROPS_TABLE.' WHERE fs_id=:fs_id AND prop_namespace=:prop_namespace AND prop_name=:prop_name');
}
$del_stmt->execute(array(
'fs_id' => $id,
'prop_namespace' => $prop['ns'],
'prop_name' => $prop['name'],
));
}
if (isset($prop['val']))
{
if (!isset($ins_stmt))
{
$ins_stmt = self::$pdo->prepare((self::$pdo_type == 'mysql' ? 'REPLACE' : 'INSERT').
' INTO '.self::PROPS_TABLE.' (fs_id,prop_namespace,prop_name,prop_value) VALUES (:fs_id,:prop_namespace,:prop_name,:prop_value)');
}
if (!$ins_stmt->execute(array(
'fs_id' => $id,
'prop_namespace' => $prop['ns'],
'prop_name' => $prop['name'],
'prop_value' => $prop['val'],
)))
{
return false;
}
}
}
return true;
}
/**
* Read properties for a ressource (file, dir or all files of a dir)
*
* @param array|string|int $path_ids (array of) string with path or integer fs_id
* @param string $ns='http://egroupware.org/' namespace if propfind should be limited to a single one, use null for all
* @return array|boolean false on error ($path_ids does not exist), array with props (values for keys 'name', 'ns', 'value'), or
* fs_id/path => array of props for $depth==1 or is_array($path_ids)
*/
static function propfind($path_ids,$ns=egw_vfs::DEFAULT_PROP_NAMESPACE)
{
$ids = is_array($path_ids) ? $path_ids : array($path_ids);
foreach($ids as &$id)
{
if (!is_numeric($id))
{
if (!($stat = self::url_stat($id,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."(".array2string($path_ids).",$ns) path '$id' not found!");
return false;
}
$id = $stat['ino'];
}
}
if (count($ids) >= 1) array_map(create_function('&$v','$v = (int)$v;'),$ids);
$query = 'SELECT * FROM '.self::PROPS_TABLE.' WHERE (fs_id'.
(count($ids) == 1 ? '='.(int)implode('',$ids) : ' IN ('.implode(',',$ids).')').')'.
(!is_null($ns) ? ' AND prop_namespace=?' : '');
if (self::LOG_LEVEL > 2) $query = '/* '.__METHOD__.': '.__LINE__.' */ '.$query;
$stmt = self::$pdo->prepare($query);
$stmt->setFetchMode(PDO::FETCH_ASSOC);
$stmt->execute(!is_null($ns) ? array($ns) : array());
$props = array();
foreach($stmt as $row)
{
$props[$row['fs_id']][] = array(
'val' => $row['prop_value'],
'name' => $row['prop_name'],
'ns' => $row['prop_namespace'],
);
}
if (!is_array($path_ids))
{
$props = $props[$row['fs_id']] ? $props[$row['fs_id']] : array(); // return empty array for no props
}
elseif ($props && isset($stat)) // need to map fs_id's to pathes
{
foreach(self::id2path(array_keys($props)) as $id => $path)
{
$props[$path] =& $props[$id];
unset($props[$id]);
}
}
if (self::LOG_LEVEL > 1) foreach((array)$props as $k => $v) error_log(__METHOD__."($path_ids,$ns) $k => ".array2string($v));
return $props;
}
}
stream_register_wrapper(sqlfs_stream_wrapper::SCHEME ,'sqlfs_stream_wrapper');
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