luos/workflow/engine/methods/cases/cases_ShowDocument.php

<?php
/**
 * cases_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.
 */
/*
 * Created on 13-02-2008
 *
 * @author David Callizaya <davidsantos@colosa.com>
 */
if (isset($_REQUEST['actionAjax']) && $_REQUEST['actionAjax'] == "verifySession" ) {
    if (!isset($_SESSION['USER_LOGGED'])) {
        if ((isset( $_POST['request'] )) && ($_POST['request'] == true)) {
            $response = new stdclass();
            $response->message = G::LoadTranslation('ID_LOGIN_AGAIN');
            $response->lostSession = true;
            print G::json_encode( $response );
            die();
        } else {
            G::SendMessageText( G::LoadTranslation('ID_LOGIN_TO_SEE_OUTPUTDOCS'), "WARNING" );
            G::header("location: " . "/");
            die();
        }
    } else {
        $response = new stdclass();
        print G::json_encode( $response );
        die();
    }
}
require_once ("classes/model/AppDocumentPeer.php");
$oAppDocument = new AppDocument();

if (empty($_GET['a'])) {
    G::header('Location: /errors/error403.php');
    die();
}

if (empty($_GET['v'])) {
    //Load last version of the document
    $docVersion = $oAppDocument->getLastAppDocVersion($_GET['a']);
} else {
    $docVersion = $_GET['v'];
}

//Check if the user can be download the input Document
//Send the parameter v = Version
//Send the parameter a = Case UID
if (defined('DISABLE_DOWNLOAD_DOCUMENTS_SESSION_VALIDATION') && DISABLE_DOWNLOAD_DOCUMENTS_SESSION_VALIDATION == 0) {

    if (!$oAppDocument->canDownloadInput($_SESSION['USER_LOGGED'], $_GET['a'], $docVersion)) {
        G::header('Location: /errors/error403.php');
        die();
    }
}

$oAppDocument->Fields = $oAppDocument->load( $_GET['a'], $docVersion );

$sAppDocUid = $oAppDocument->getAppDocUid();
$iDocVersion = $oAppDocument->getDocVersion();
$info = pathinfo( $oAppDocument->getAppDocFilename() );
$ext = (isset($info['extension'])?$info['extension']:'');//BUG fix: must handle files without any extension

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

$app_uid = G::getPathFromUID($oAppDocument->Fields['APP_UID']);
$file = G::getPathFromFileUID($oAppDocument->Fields['APP_UID'], $sAppDocUid);

$realPath = PATH_DOCUMENT .  $app_uid . '/' . $file[0] . $file[1] . '_' . $iDocVersion . '.' . $ext;
$realPath1 = PATH_DOCUMENT . $app_uid . '/' . $file[0] . $file[1] . '.' . $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 = 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" . config("system.workspace"), $_SERVER['HTTP_REFERER'] );
        G::header( "location: " . "/sys" . config("system.workspace") . $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 {
        $nameFile = $oAppDocument->Fields['APP_DOC_FILENAME'];
        $licensedFeatures = &PMLicensedFeatures::getSingleton();
        $downloadStatus = false;
        /*----------------------------------********---------------------------------*/
        if ($licensedFeatures->verifyfeature('AhKNjBEVXZlWUFpWE8wVTREQ0FObmo0aTdhVzhvalFic1M=')) {

            $drive = new AppDocumentDrive();
            if ($drive->getStatusDrive()) {
                $fieldDrive = $oAppDocument->getAppDocDriveDownload();
                $drive->loadUser($_SESSION['USER_LOGGED']);
                $uidDrive = $drive->changeUrlDrive($oAppDocument->Fields, $oAppDocument->getAppDocType());
                $fileContent = $drive->download($uidDrive);
                if ($fileContent !== null) {
                    $downloadStatus = true;
                    header('Content-Description: File Transfer');
                    header('Content-Disposition: attachment; filename='.$nameFile);
                    header('Content-Transfer-Encoding: binary');
                    header('Set-Cookie: fileLoading=true');
                    echo $fileContent;
                    exit();
                }
            }
        }
        /*----------------------------------********---------------------------------*/
        if (!$downloadStatus) {
            G::streamFile( $realPath, $bDownload, $nameFile ); //download
        }



    }
}