What type of requests do webhooks use to send real-time notifications in Liferay?

Webhooks in Liferay use HTTP POST requests to send real-time notifications. This choice is appropriate because POST requests are designed for sending data to a server to create or update a resource, which aligns with the functionality of webhooks. When an event occurs in an application, the webhook sends an HTTP POST request to a specified URL, containing information about the event. This allows for efficient and immediate communication between different services in response to particular triggers.

Using POST requests is also beneficial as they can carry a payload within the body of the request, allowing for flexible and complex data transfer that can inform the receiving service about the specifics of the event. This characteristic is essential for webhooks to provide meaningful updates or notifications.

In contrast, DELETE requests are typically used for removing resources from the server and would not be appropriate for sending notifications. PUT requests are primarily used for updating existing resources and also do not fit the model of event-driven notifications. OPTIONS requests are used to describe the communication options for the target resource and are not intended for sending event data.