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<?php
/**
* @package yii2-grid
* @author Kartik Visweswaran <kartikv2@gmail.com>
* @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014 - 2020
* @version 3.3.6
*/
namespace kartik\grid\controllers;
use Yii;
use yii\base\InvalidCallException;
use yii\base\InvalidConfigException;
use yii\helpers\Json;
use yii\web\Controller;
use yii\web\Response;
use kartik\base\Config;
use kartik\grid\GridView;
use kartik\mpdf\Pdf;
use kartik\grid\Module;
/**
* ExportController manages actions for downloading the [[GridView]] tabular content in various export formats.
*
* @author Kartik Visweswaran <kartikv2@gmail.com>
* @since 1.0
*/
class ExportController extends Controller
{
/**
* Download the exported file
*
* @return mixed
* @throws \yii\base\InvalidConfigException
*/
public function actionDownload()
{
/**
* @var Module $module
*/
$request = Yii::$app->request;
$moduleId = $request->post('module_id', Module::MODULE);
$module = Config::getModule($moduleId, Module::class);
$type = $request->post('export_filetype', 'html');
$name = $request->post('export_filename', Yii::t('kvgrid', 'export'));
$content = $request->post('export_content', Yii::t('kvgrid', 'No data found'));
$mime = $request->post('export_mime', 'text/plain');
$encoding = $request->post('export_encoding', 'utf-8');
$bom = $request->post('export_bom', 1);
$hashConfig = $request->post('hash_export_config', 0);
$hashConfig = empty($hashConfig) ? 0 : 1;
$config = $request->post('export_config', '{}');
$cfg = empty($hashConfig) ? '' : $config;
$oldHash = $request->post('export_hash');
$newData = $moduleId . $name . $mime . $encoding . $bom . $hashConfig . $cfg;
$security = Yii::$app->security;
$salt = $module->exportEncryptSalt;
$newHash = $security->hashData($newData, $salt);
if (!$security->validateData($oldHash, $salt) || $oldHash !== $newHash) {
$params = "\nOld Hash:{$oldHash}\nNew Hash:{$newHash}\n";
throw new InvalidCallException("The parameters for yii2-grid export seem to be tampered. Please retry!{$params}");
}
if ($type == GridView::PDF) {
$config = Json::decode($config);
return $this->generatePDF($content, "{$name}.pdf", $config);
} elseif ($type == GridView::CSV || $type == GridView::TEXT) {
if ($encoding != 'utf-8') {
$content = mb_convert_encoding($content, $encoding, 'utf-8');
} elseif ($bom) {
$content = chr(239) . chr(187) . chr(191) . $content; // add BOM
}
}
$this->setHttpHeaders($type, $name, $mime, $encoding);
return $content;
}
/**
* Generates the PDF file
*
* @param string $content the file content
* @param string $filename the file name
* @param array $config the configuration for yii2-mpdf component
*
* @return Response
* @throws InvalidConfigException
*/
protected function generatePDF($content, $filename, $config = [])
{
unset($config['contentBefore'], $config['contentAfter']);
$config['filename'] = $filename;
$config['methods']['SetAuthor'] = [Yii::t('kvgrid', 'Krajee Solutions')];
$config['methods']['SetCreator'] = [Yii::t('kvgrid', 'Krajee Yii2 Grid Export Extension')];
$config['content'] = $content;
$pdf = new Pdf($config);
return $pdf->render();
}
/**
* Sets the HTTP headers needed by file download action.
*
* @param string $type the file type
* @param string $name the file name
* @param string $mime the mime time for the file
* @param string $encoding the encoding for the file content
*/
protected function setHttpHeaders($type, $name, $mime, $encoding = 'utf-8')
{
$response = Yii::$app->response;
$response->format = Response::FORMAT_RAW;
$headers = $response->getHeaders();
$headers->set('Content-Type', "{$mime}; charset={$encoding}");
$headers->set('Content-Transfer-Encoding', $encoding);
$headers->set('Cache-Control', 'public, must-revalidate, max-age=0');
$headers->set('Pragma', 'public');
$headers->set('Expires', 'Sat, 26 Jul 1997 05:00:00 GMT');
$headers->set('Last-Modified', gmdate('D, d M Y H:i:s') . ' GMT');
$headers->set('Content-Disposition', "attachment; filename={$name}.{$type}");
}
}