我需要在Symfony2应用程序的控制器中执行一个持久的命令,并实时向用户返回终端的输出。
我读过这个:
http://symfony.com/doc/current/components/process.html#getting-实时过程输出
我不知道如何在Twig模板中实时打印终端输出。
编辑:感谢Matteo的代码和用户的评论,最终实现是:
/**
* @Route("/genera-xxx-r", name="commission_generate_r_xxx")
* @Method({"GET"})
*/
public function generateRXXXsAction()
{
//remove time constraints if your script last very long
set_time_limit(0);
$rFolderPath = $this->container->getParameter('xxx_settings')['r_setting_folder_path'];
$script = 'R --slave -f ' . $rFolderPath . 'main.R';
$response = new StreamedResponse();
$process = new Process($script);
$response->setCallback(function() use ($process) {
$process->run(function ($type, $buffer) {
//if you don't want to render a template, please refer to the @Matteo's reply
echo $this->renderView('AppBundle:Commission:_process.html.twig',
array(
'type' => $type,
'buffer' => $buffer
));
//according to @Ilmari Karonen a flush call could fix some buffering issues
flush();
});
});
$response->setStatusCode(200);
return $response;
}
如果需要启动一个简单的shell脚本并捕获输出,可以将StreamedResponse与发布的Process
回调结合使用。
作为示例,假设您有一个非常简单的bash脚本,如下所示:
loop.sh
for i in {1..500}
do
echo "Welcome $i times"
done
你可以执行你的行动,比如:
/**
* @Route("/process", name="_processaction")
*/
public function processAction()
{
// If your script take a very long time:
// set_time_limit(0);
$script='/path-script/.../loop.sh';
$process = new Process($script);
$response->setCallback(function() use ($process) {
$process->run(function ($type, $buffer) {
if (Process::ERR === $type) {
echo 'ERR > '.$buffer;
} else {
echo 'OUT > '.$buffer;
echo '<br>';
}
});
});
$response->setStatusCode(200);
return $response;
}
根据缓冲区的长度,你可以得到一个输出,比如:
.....
OUT > Welcome 40 times Welcome 41 times
OUT > Welcome 42 times Welcome 43 times
OUT > Welcome 44 times Welcome 45 times
OUT > Welcome 46 times Welcome 47 times
OUT > Welcome 48 times
OUT > Welcome 49 times Welcome 50 times
OUT > Welcome 51 times Welcome 52 times
OUT > Welcome 53 times
.....
您可以使用渲染控制器将其封装在页面的一部分中,例如:
<div id="process">
{{ render(controller(
'AcmeDemoBundle:Test:processAction'
)) }}
</div>
更多信息点击这里
希望这能帮助