Web Hook

Introduction

• It is in a publish-and-subscribe format

• Client is required to enter endpoint url to web hook provider in order to subscribe the event

• When there is a event, the provider will send the post request to the endpoint actively in order to publish the new message to the client

Web hook vs API

• It can be treated as API in reverse, the server send to client actively , instead of client make a request to server

• Once subscribed to provider, the provider will keep sending event to client continuously, instead of client send the request to server with constant time interval which is called polling