What is the difference between a Webhook and a server hook in terms of their application and operation?

A webhook is a mechanism where one web service sends an HTTP request (usually POST) to another service when a specific event occurs. This allows systems to notify each other asynchronously and integrate without constant polling.

A server hook is a more general term that can refer to any mechanism that triggers code on a server upon certain events, such as hooks in version control systems (Git hooks), which are triggered on the server during commits, pushes, etc.

Main differences:

• Webhook is usually an external HTTP request directed to another service.
• Server hook is internal logic on the server, triggered by events within the system.

Example: When pushing to a repository, GitHub sends a web hook to the CI server, and on the CI server itself, there are server hooks that initiate the build.