Admidio/admidio

<?php
/**
 ***********************************************************************************************
 * Read a file from the adm_my_files folder
 *
 * @copyright The Admidio Team
 * @see https://www.admidio.org/
 * @license https://www.gnu.org/licenses/gpl-2.0.html GNU General Public License v2.0 only
 *
 * Parameters:
 *
 * file_uuid :  The UUID of the file that should be returned
 * view      :  If set to true than the output will not be send as attachement
 ***********************************************************************************************
 */
use Admidio\Exception;

require_once(__DIR__ . '/../../system/common.php');

try {
    // Initialize and check the parameters
    $getFileUuid = admFuncVariableIsValid($_GET, 'file_uuid', 'uuid', array('requireValue' => true));
    $getView = admFuncVariableIsValid($_GET, 'view', 'bool');

    // check if the module is enabled and disallow access if it's disabled
    if (!$gSettingsManager->getBool('documents_files_module_enabled')) {
        throw new Exception('SYS_MODULE_DISABLED');
    }

    // get recordset of current file from database
    $file = new TableFile($gDb);
    $file->getFileForDownload($getFileUuid);

    // get complete path with filename of the file
    $completePath = $file->getFullFilePath();

    // check if the file already exists
    if (!is_file($completePath)) {
        throw new Exception('SYS_FILE_NOT_EXIST');
    }

    // Increment download counter
    $file->setValue('fil_counter', (int)$file->getValue('fil_counter') + 1);
    $file->save();

    // determine filesize
    $fileSize = filesize($completePath);

    if ($getView) {
        $content = 'inline';
    } else {
        $content = 'attachment';
    }

    // Create appropriate header information of the file
    header('Content-Type: ' . $file->getMimeType());
    header('Content-Length: ' . $fileSize);
    header('Content-Disposition: ' . $content . '; filename="' . $file->getValue('fil_name') . '"');

    // necessary for IE, because without it the download with SSL has problems
    header('Cache-Control: private');
    header('Pragma: public');

    // file output
    if ($fileSize > 10 * 1024 * 1024) {
        // file output for large files (> 10MB)
        $chunkSize = 1024 * 1024;
        $handle = fopen($completePath, 'rb');
        while (!feof($handle)) {
            $buffer = fread($handle, $chunkSize);
            echo $buffer;
            ob_flush();
            flush();
        }
        fclose($handle);
    } else {
        // file output for small files (< 10MB)
        readfile($completePath);
    }
} catch (Exception $e) {
    $gMessage->show($e->getMessage());
}