Webhook

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6.3

The Webhook component was introduced in Symfony 6.3.

The Webhook component is used to respond to remote webhooks to trigger actions in your application. This document focuses on using webhooks to listen to remote events in other Symfony components.

Installation

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$ composer require symfony/webhook

Usage in Combination with the Mailer Component

When using a third-party mailer, you can use the Webhook component to receive webhook calls from the third-party mailer.

In this example Mailgun is used with 'mailer_mailgun' as the webhook type. Any type name can be used as long as it is unique. Make sure to use it in the routing configuration, the webhook URL and the RemoteEvent consumer.

Install the third-party mailer as described in the documentation of the Mailer component.

The Webhook component routing needs to be defined:

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# config/packages/framework.yaml
framework:
    webhook:
        routing:
            mailer_mailgun:
                service: 'mailer.webhook.request_parser.mailgun'
                secret: '%env(MAILER_MAILGUN_SECRET)%'

Currently, the following third-party mailer services support webhooks:

Mailer service Parser service name
Mailgun mailer.webhook.request_parser.mailgun
Postmark mailer.webhook.request_parser.postmark

Set up the webhook in the third-party mailer. For Mailgun, you can do this in the control panel. As URL, make sure to use the /webhook/mailer_mailgun path behind the domain you're using.

Mailgun will provide a secret for the webhook. Add this secret to your .env file:

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MAILER_MAILGUN_SECRET=your_secret

With this done, you can now add a RemoteEvent consumer to react to the webhooks:

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use Symfony\Component\RemoteEvent\Attribute\AsRemoteEventConsumer;
use Symfony\Component\RemoteEvent\Consumer\ConsumerInterface;
use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
use Symfony\Component\RemoteEvent\RemoteEvent;

#[AsRemoteEventConsumer('mailer_mailgun')]
class WebhookListener implements ConsumerInterface
{
    public function consume(RemoteEvent $event): void
    {
        if ($event instanceof MailerDeliveryEvent) {
            $this->handleMailDelivery($event);
        } elseif ($event instanceof MailerEngagementEvent) {
            $this->handleMailEngagement($event);
        } else {
            // This is not an email event
            return;
        }
    }

    private function handleMailDelivery(MailerDeliveryEvent $event): void
    {
        // Handle the mail delivery event
    }

    private function handleMailEngagement(MailerEngagementEvent $event): void
    {
        // Handle the mail engagement event
    }
}

Usage in Combination with the Notifier Component

The usage of the Webhook component when using a third-party transport in the Notifier is very similar to the usage with the Mailer.

Currently, the following third-party SMS transports support webhooks:

SMS service Parser service name
Twilio notifier.webhook.request_parser.twilio

6.3

The support for Twilio was introduced in Symfony 6.3.

For SMS transports, an additional SmsEvent is available in the RemoteEvent consumer:

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use Symfony\Component\RemoteEvent\Attribute\AsRemoteEventConsumer;
use Symfony\Component\RemoteEvent\Consumer\ConsumerInterface;
use Symfony\Component\RemoteEvent\Event\Sms\SmsEvent;
use Symfony\Component\RemoteEvent\RemoteEvent;

#[AsRemoteEventConsumer('notifier_twilio')]
class WebhookListener implements ConsumerInterface
{
    public function consume(RemoteEvent $event): void
    {
        if ($event instanceof SmsEvent) {
            $this->handleSmsEvent($event);
        } else {
            // This is not an sms event
            return;
        }
    }

    private function handleSmsEvent(SmsEvent $event): void
    {
        // Handle the sms event
    }
}
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
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