如何在Symfony2应用程序的控制器中执行命令并在Twig模板中实时打印输出 [英] How to execute a command within a controller of a Symfony2 application and print in real-time the output in a Twig template
问题描述
我需要在Symfony2应用程序的控制器内执行一条持久命令,并将终端的输出实时返回给用户.
I need to execute a long-lasting command within a controller of my Symfony2 application and to return to the user in real time the output of the terminal.
我已阅读:
http://symfony.com/doc/current/components/process.html#getting-real-time-process-output
我不知道如何在Twig模板中实时打印终端输出.
I can't figure out how to print in real time the terminal output in a Twig template.
多亏了Matteo的代码和用户的评论,最终的实现是:
Thanks to the Matteo's code and users comments, the final implementation is:
/**
* @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;
}
推荐答案
If you need lo launch a simple shell script and capture the output, you can use a StreamedResponse in conjunction with the Process
callback you posted.
作为示例,假设您有一个非常简单的bash脚本,如下所示:
As Example, suppose you have a very simple bash script like follow:
loop.sh
for i in {1..500}
do
echo "Welcome $i times"
done
您可以执行以下操作:
/**
* @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,您可以得到类似以下的输出:
And depends on the buffer length you can have an output like:
.....
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包装在页面的一部分中:
You can wrap this in a portion of a page with a render controller as example:
<div id="process">
{{ render(controller(
'AcmeDemoBundle:Test:processAction'
)) }}
</div>
更多信息此处
希望获得帮助
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