从php运行node file.js并在卸载时将其杀死-Windows [英] Run node file.js from php and kill it on unload - Windows

问题描述

我的目标是在脚本开始时从我的php页面运行一个节点文件，然后在关闭页面时终止该进程.我一直在读一些没有运气的问题和答案.我可以通过示例来运行

my goal is to run a node file from my php page at the start of my script and then kill that process when the page is closed. I have been reading several questions and answers without luck. I can run by example

exec("node myapp.js arg1 arg2 2>&1", $retArr);

在我的节点文件中添加:

In my node file i added:

 console.log(process.pid);

因此，现在我在输出数组上接收到该进程的PID，但是必须结束该操作，以后我可以使用exec('taskkill/PID'.$ array [x].'/f')将其杀死.我如何才能从php获取该进程pid，以仅杀死该进程??

So now i receive the PID of the process on the output array but have to be ended, with this i could kill it later with exec('taskkill /PID '.$array[x].' /f'), how i can get that process pid from php to kill only that one?.

任何灯都将不胜感激.预先感谢.

Any lights will be REALLY appreciated. Thanks in advance.

推荐答案

Windows用户:

Windows Users:

好吧，如果有人遇到相同的问题，我找到了解决此问题的方法.

Ok I found a workaround for this situation in case someone face the same issue.

节点应用程序需要侦听已定义的端口，因此您可以将该端口作为参数传递给节点应用程序，而我需要从所有可能的解决方案中在PHP的开头在后台启动该节点应用程序.一个是最适合我的一个:

The node app need to listen in a defined port, so you can pass that port to the node app as argument and I needed to start that node app in the background at the beginning of my PHP, from all the possible solutions this one was the one that worked best for me:

$rshell = new COM("WScript.Shell");
$rexec = $rshell->Run("node C:\PATH\TO\NODE\APP\myapp.js ".$appPort." ", 0, false); 

这将在后台运行该应用，并且您的侦听端口位于一个变量中.

this will run the app in the background and you have the listening port in a variable.

Node应用程序可以接收参数，您可以使用以下参数检索它们:

Node apps can receive arguments and you can retrieve them using:

process.argv.forEach((val, index) => {
    console.log(`${index}: ${val}`);
});

var appPort = process.argv[2];
...
app.listen(appPort);

回到PHP

好的，到目前为止，您可以在后台从php启动节点应用程序，并且具有侦听端口，因此现在我们创建一个新的php文件来处理关闭过程，假设closeNode.php可以接收我们的侦听通过AJAX onunload变量:

Back to the PHP

Fine, so far you can start up the node app from php in the background and you have the listening port, so now we create a new php file to handle the closing process, lets say closeNode.php that will receive our listening variable via AJAX onunload :

$( window ).unload(function() {
  <!-- your ajax call sending the appPort variable-->
}); 

closingNode.php

$appPort = $_POST('appPort')

exec('netstat -a -n -o | find "LISTENING" | find "'.$appPort.'"', $result);

if (!empty($result)) {

$pidArray = array();

foreach ($result as $value) {    

// our pid is at the end of the string, then we trim the last 10 characters that is enough for the pid process number

$pidArray[] = substr($value, -10);

}

$pidTrimmed = array_map('trim', $pidArray);
$pid = $pidTrimmed[0];

exec('taskkill /f /PID '.$pid.'', $resultKill);

也许不是更优雅的解决方案，但它可以工作.

Maybe is not the more elegant solution, but it works.

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