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administrator/components/com_convertforms/controllers/export.php

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+<?php
+
+/**
+ * @package         Convert Forms
+ * @version         3.2.12 Free
+ * 
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            http://www.tassos.gr
+ * @copyright       Copyright © 2020 Tassos Marinos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+*/
+
+defined('_JEXEC') or die('Restricted access');
+ 
+// import Joomla controlleradmin library
+jimport('joomla.application.component.controlleradmin');
+
+/**
+ * Export controller class.
+ */
+class ConvertFormsControllerExport extends JControllerAdmin
+{
+	 /**
+	  * Used by the export form to submit the data
+	  *
+	  * @return void
+	  */
+	public function export()
+	{
+		JSession::checkToken('request') or die(JText::_('JINVALID_TOKEN'));
+
+		$app = JFactory::getApplication();
+		$input = $app->input;
+
+		$tz   = new \DateTimeZone($app->getCfg('offset', 'GMT'));
+		$date = \JFactory::getDate()->setTimezone($tz)->format('YmdHis', true);
+		$filename = 'convertforms_submissions_' . $date . '.' . $input->get('export_type');
+
+		$options = $input->getArray();
+		$options['filter_search'] = $input->get('filter_search', null, 'RAW'); // Allow commas and special characters.
+		$options['filename'] = $input->get('filename', $filename);
+
+		$app->redirect('index.php?option=com_convertforms&view=export&layout=progress&' . http_build_query($options));
+	}
+
+	/**
+	 * Force download of the exported file
+	 *
+	 * @return void
+	 */
+	public function download()
+	{
+		if (!$filename = JFactory::getApplication()->input->get('filename', '', 'RAW'))
+		{
+			throw new Exception('Invalid filename');
+		}
+
+		$filename = NRFramework\File::getTempFolder() . $filename;
+
+		if (!JFile::exists($filename))
+		{
+			throw new Exception('Invalid filename');
+		}
+
+		error_reporting(0);
+
+		// Send the appropriate headers to force the download in the browser
+		header('Content-Description: File Transfer');
+		header('Content-Type: application/octet-stream');
+		header('Content-Disposition: attachment; filename="' . basename($filename) . '"');
+		header('Expires: 0');
+		header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
+		header("Cache-Control: public", false);
+		header('Pragma: public');
+		header('Content-Length: ' . @filesize($filename));
+
+		// Read exported file to buffer
+		readfile($filename);
+
+		// Don't leave any clues on the server. Delete the file.
+		JFile::delete($filename);
+
+		jexit();
+	}
+}