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<?php
/***********************************************
* File : mapistreamwrapper.php
* Project : Z-Push
* Descr : Wraps a mapi stream as a standard php stream
* The used method names are predefined and can not be altered.
*
* Created : 24.11.2011
*
* Copyright 2007 - 2011 Zarafa Deutschland GmbH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation with the following additional
* term according to sec. 7:
*
* According to sec. 7 of the GNU Affero General Public License, version 3,
* the terms of the AGPL are supplemented with the following terms:
*
* "Zarafa" is a registered trademark of Zarafa B.V.
* "Z-Push" is a registered trademark of Zarafa Deutschland GmbH
* The licensing of the Program under the AGPL does not imply a trademark license.
* Therefore any rights, title and interest in our trademarks remain entirely with us.
*
* However, if you propagate an unmodified version of the Program you are
* allowed to use the term "Z-Push" to indicate that you distribute the Program.
* Furthermore you may use our trademarks where it is necessary to indicate
* the intended purpose of a product or service provided you use it in accordance
* with honest practices in industrial or commercial matters.
* If you want to propagate modified versions of the Program under the name "Z-Push",
* you may only do so if you have a written permission by Zarafa Deutschland GmbH
* (to acquire a permission please contact Zarafa at trademark@zarafa.com).
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Consult LICENSE file for details
************************************************/
class MAPIStreamWrapper {
const PROTOCOL = "mapistream";
private $mapistream;
private $position;
private $streamlength;
/**
* Opens the stream
* The mapistream reference is passed over the context
*
* @param string $path Specifies the URL that was passed to the original function
* @param string $mode The mode used to open the file, as detailed for fopen()
* @param int $options Holds additional flags set by the streams API
* @param string $opened_path If the path is opened successfully, and STREAM_USE_PATH is set in options,
* opened_path should be set to the full path of the file/resource that was actually opened.
*
* @access public
* @return boolean
*/
public function stream_open($path, $mode, $options, &$opened_path) {
$contextOptions = stream_context_get_options($this->context);
if (!isset($contextOptions[self::PROTOCOL]['stream']))
return false;
$this->position = 0;
// this is our stream!
$this->mapistream = $contextOptions[self::PROTOCOL]['stream'];
// get the data length from mapi
$stat = mapi_stream_stat($this->mapistream);
$this->streamlength = $stat["cb"];
ZLog::Write(LOGLEVEL_DEBUG, sprintf("MAPIStreamWrapper::stream_open(): initialized mapistream: %s streamlength: %d", $this->mapistream, $this->streamlength));
return true;
}
/**
* Reads from stream
*
* @param int $len amount of bytes to be read
*
* @access public
* @return string
*/
public function stream_read($len) {
$data = mapi_stream_read($this->mapistream, $len);
$this->position += strlen($data);
return $data;
}
/**
* Returns the current position on stream
*
* @access public
* @return int
*/
public function stream_tell() {
return $this->position;
}
/**
* Indicates if 'end of file' is reached
*
* @access public
* @return boolean
*/
public function stream_eof() {
return ($this->position >= $this->streamlength);
}
/**
* Instantiates a MAPIStreamWrapper
*
* @param mapistream $mapistream The stream to be wrapped
*
* @access public
* @return MAPIStreamWrapper
*/
static public function Open($mapistream) {
$context = stream_context_create(array(self::PROTOCOL => array('stream' => &$mapistream)));
return fopen(self::PROTOCOL . "://",'r', false, $context);
}
}
stream_wrapper_register(MAPIStreamWrapper::PROTOCOL, "MAPIStreamWrapper")
?>
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