php - Swift_Mailer Symfony 3 添加事件监听发送事件

Question

如何给swiftmailer发送事件添加eventListener？每次我发送电子邮件时，我都会创建一个文件并将其附加到电子邮件中，发送后我想取消链接该文件。怎么做？谢谢。

 file_put_contents($path, implode(";\r\n", $result));
$message = (new \Swift_Message('VAT checking result !'))
            ->setFrom('vah@gmail.com')
            ->setTo($vat->getEmail())
             ->setBody(
                    'Hello, ...' ,'text/')
             ->attach(\Swift_Attachment::fromPath($path));
// START send result email
    $mailer = $this->container->get('mailer');

    $listener = $this->container->get('app.service.send_email_listener');
    $listener->setPathToFile($path);
    $mailer->registerPlugin($listener);

    $mailer->send( $message );
    // END send email to admin

//unlink($path);  email will not be sent

我试过那样注册监听器

app.service.send_email_listener:
    class: AppBundle\Listener\SendEmailListener
    public: true
    tags:
         - { name: swiftmailer.plugin }

这是监听类:

namespace AppBundle\Listener;

use \Swift_Events_SendListener as base;

class SendEmailListener implements base
{
    private $pathToFile;

    public function setPathToFile($path)
    {
        $this->pathToFile = $path;
    }
    public function getPathToFile($path)
    {
        return $this->pathToFile;
    }


    /**
     * Invoked immediately before the Message is sent.
     *
     * @param \Swift_Events_SendEvent $evt
     */
    public function beforeSendPerformed(\Swift_Events_SendEvent $evt)
    {

    }

    /**
     * Invoked immediately after the Message is sent.
     *
     * @param \Swift_Events_SendEvent $evt
     */
    public function sendPerformed(\Swift_Events_SendEvent $evt)
    {
        if($this->pathToFile){
            unlink($this->pathToFile);
        }
    }
}

编辑它执行该方法，但 swift 无法流式传输文件，因为文件在发送结束之前未链接...这是来自 dev_logs:

[2018-05-24 20:40:18] php.CRITICAL: Uncaught Exception: Unable to open file for reading [C:\Users\\projects\vat\web\vatfiles\122.txt] {"exception":"[object] (Swift_IoException(code: 0): Unable to open file for reading [C:\\Users\\\projects\\vat\\web\\vatfiles\\122.txt] at C:\\Users\\projects\\vat\\vendor\\swiftmailer\\swiftmailer\\lib\\classes\\Swift\\ByteStream\\FileByteStream.php:144)"} []

Answer 1

作为使用 Swiftmailer 插件的替代方案，我建议使用 __destruct您的服务/ Controller 中使用文件的魔术方法。 __destruct 将在释放对象时调用，并将取消链接任何已声明的路径。

namespace AppBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class YourController extends Controller
{
    private $paths = [];

    public function someAction()
    {
         $this->paths[] = $path;
         file_put_contents($path, implode(";\r\n", $result));
         $message = (new \Swift_Message('VAT checking result !'))
            ->setFrom('vah@gmail.com')
            ->setTo($vat->getEmail())
            ->setBody('Hello, ...' ,'text/')
            ->attach(\Swift_Attachment::fromPath($path));
         $mailer = $this->container->get('mailer');
         $mailer->send( $message );

         return $this->redirectToRoute('some_route');
    }

    public function __destruct()
    {
        if ($this->paths) {
            array_map('unlink', $this->paths);
        }
    }

}

NOTE: This approach may not work if you use a spool to send emails, as the email will not be sent until the thresholds have been met for the spool.

---

当您使用 swiftmailer.plugin 标记服务时，Symfony 2.3+ 将自动注册 Swiftmailer 插件。因此无需调用 $mailer->registerPlugin($listener);，swiftmailer 将忽略重复的插件注册。