luos/workflow/engine/methods/tracker/tracker_ShowDocument.php

<?php
/**
 * tracker_ShowDocument.php
 *
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2008 Colosa Inc.23
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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/>.
 *
 * For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
 * Coral Gables, FL, 33134, USA, or email info@colosa.com.
 *
 */

require_once ( "classes/model/AppDocumentPeer.php" );

$oAppDocument = new AppDocument();
if(!isset($_GET['v'])){//Load last version of the document
    $docVersion=$oAppDocument->getLastAppDocVersion($_GET['a']);
}else{
    $docVersion=$_GET['v'];
}
$oAppDocument->Fields = $oAppDocument->load($_GET['a'],$docVersion);

$sAppDocUid = $oAppDocument->getAppDocUid();
$iDocVersion = $oAppDocument->getDocVersion();
$info = pathinfo( $oAppDocument->getAppDocFilename() );
$ext = $info['extension'];

if (isset($_GET['b'])) {
    if ($_GET['b'] == '0') {
        $bDownload = false;
    }
    else {
        $bDownload = true;
    }
}
else {
    $bDownload = true;
}


$realPath = PATH_DOCUMENT . $oAppDocument->Fields['APP_UID'] . '/' . $sAppDocUid .'_'.$iDocVersion . '.' . $ext ;
$realPath1 = PATH_DOCUMENT . $oAppDocument->Fields['APP_UID'] . '/' . $sAppDocUid  . '.' . $ext ;
$sw_file_exists=false;
if(file_exists($realPath)){
    $sw_file_exists=true;
}elseif(file_exists($realPath1)){
    $sw_file_exists=true;
    $realPath=$realPath1;
}

if(!$sw_file_exists){
    $error_message="'".$oAppDocument->Fields['APP_DOC_FILENAME']. "' ".G::LoadTranslation('ID_ERROR_STREAMING_FILE');
    if((isset($_POST['request']))&&($_POST['request']==true)){
        $res ['success'] = 'failure';
        $res ['message'] = $error_message;
        print G::json_encode ( $res );
    }else{
        G::SendMessageText($error_message, "ERROR");
        $backUrlObj=explode("sys".SYS_SYS,$_SERVER['HTTP_REFERER']);
        G::header("location: "."/sys".SYS_SYS.$backUrlObj[1]);
        die;
    }

}else{
    if((isset($_POST['request']))&&($_POST['request']==true)){
        $res ['success'] = 'success';
        $res ['message'] = $oAppDocument->Fields['APP_DOC_FILENAME'];
        print G::json_encode ( $res );
    }else{
        G::streamFile ( $realPath, $bDownload, $oAppDocument->Fields['APP_DOC_FILENAME'] );
    }
}