ezfilepasstroughhandler.php

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<?php
//
// Definition of eZBinaryFileHandler class
//
// Created on: <30-Apr-2002 16:47:08 bf>
//
// ## BEGIN COPYRIGHT, LICENSE AND WARRANTY NOTICE ##
// SOFTWARE NAME: eZ publish
// SOFTWARE RELEASE: 3.9.x
// COPYRIGHT NOTICE: Copyright (C) 1999-2006 eZ systems AS
// SOFTWARE LICENSE: GNU General Public License v2.0
// NOTICE: >
//   This program is free software; you can redistribute it and/or
//   modify it under the terms of version 2.0  of the GNU General
//   Public License as published by the Free Software Foundation.
//
//   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 General Public License for more details.
//
//   You should have received a copy of version 2.0 of the GNU General
//   Public License along with this program; if not, write to the Free
//   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
//   MA 02110-1301, USA.
//
//
// ## END COPYRIGHT, LICENSE AND WARRANTY NOTICE ##
//

/*!
  \class eZFilePasstroughHandler ezfilepasstroughhandler.php
  \ingroup eZBinaryHandlers
  \brief Handles file downloading by passing the file trough PHP

*/
include_once( "kernel/classes/datatypes/ezbinaryfile/ezbinaryfile.php" );
include_once( "kernel/classes/ezbinaryfilehandler.php" );
define( "EZ_FILE_PASSTROUGH_ID", 'ezfilepasstrough' );

class eZFilePasstroughHandler extends eZBinaryFileHandler
{
    function eZFilePasstroughHandler()
    {
        $this->eZBinaryFileHandler( EZ_FILE_PASSTROUGH_ID, "PHP passtrough", EZ_BINARY_FILE_HANDLE_DOWNLOAD );
    }

    function handleFileDownload( &$contentObject, &$contentObjectAttribute, $type,
                                 $fileInfo )
    {
        $fileName = $fileInfo['filepath'];

        // VS-DBFILE

        require_once( 'kernel/classes/ezclusterfilehandler.php' );
        $file = eZClusterFileHandler::instance( $fileName );

        if ( $fileName != "" and $file->exists() )
        {
            $file->fetch();
            $fileSize = $file->size();
            $mimeType =  $fileInfo['mime_type'];
            $originalFileName = $fileInfo['original_filename'];
            $contentLength = $fileSize;
            $fileOffset = false;
            $fileLength = false;
            if ( isset( $_SERVER['HTTP_RANGE'] ) )
            {
                $httpRange = trim( $_SERVER['HTTP_RANGE'] );
                if ( preg_match( "/^bytes=([0-9]+)-$/", $httpRange, $matches ) )
                {
                    $fileOffset = $matches[1];
                    header( "Content-Range: bytes $fileOffset-" . ( $fileSize - 1 ) . "/$fileSize" );
                    header( "HTTP/1.1 206 Partial content" );
                    $contentLength -= $fileOffset;
                }
            }
            // Figure out the time of last modification of the file right way to get the file mtime ... the
            $fileModificationTime = filemtime( $fileName );

            ob_clean();
            header( "Pragma: " );
            header( "Cache-Control: " );
            /* Set cache time out to 10 minutes, this should be good enough to work around an IE bug */
            header( "Expires: ". gmdate('D, d M Y H:i:s T', time() + 600) . ' GMT' );
            header( "Last-Modified: ". gmdate( 'D, d M Y H:i:s T', $fileModificationTime ) . ' GMT' );
            header( "Content-Length: $contentLength" );
            header( "Content-Type: $mimeType" );
            header( "X-Powered-By: eZ publish" );
            header( "Content-disposition: attachment; filename=\"$originalFileName\"" );
            header( "Content-Transfer-Encoding: binary" );
            header( "Accept-Ranges: bytes" );

            $fh = fopen( "$fileName", "rb" );
            if ( $fileOffset )
            {
                eZDebug::writeDebug( $fileOffset, "seeking to fileoffset" );
                fseek( $fh, $fileOffset );
            }

            ob_end_clean();
            fpassthru( $fh );
            fclose( $fh );
            fflush( $fh );

            // VS-DBFILE : NOTE: We don't remove fetched file here to avoid refetching on each download.
            // We may need a way to purge obsolete files though.

            //$file->deleteLocal();

            eZExecution::cleanExit();
        }
        return EZ_BINARY_FILE_RESULT_UNAVAILABLE;
    }
}

?>

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