An application instance is the main unit of a Ktor application. It is the starting point of our application. A request (which can be an HTTP, HTTP/2, or Socket request) comes in the application and is converted to an ApplicationCall. It then goes through a pipeline that contains one or more previously installed interceptors; these provide certain functionalities such as routing, compression, and many more.
The ApplicationCall provides access to two main properties:
- ApplicationRequest: This corresponds to the incoming request
- ApplicationResponse: This corresponds to the outgoing response
It also provides some useful functions to help respond to client requests.
Let's look at our main Application.kt file:
/** * Starting ...
