Organizing routes in Ktor

In Ktor, structuring multiple routes belonging to the same domain can be streamlined for better organization and readability. Our current routing{} block includes various endpoints, some of which are related to cats.

Here’s how our routing block looks currently:

routing {
    get("/status") {
        ...
    }
    post("/cats") {
        ...
    }
    get("/cats") {
        ...
    }
    get("/cats/{id}") {
        ...
    }
}

To improve the structure, we can extract all cat-related routes into a separate function:

fun Routing.catsRoutes() {
    ...
}

In IntelliJ IDEA, there’s even an option to automatically generate an extension function on the Routing class.

To tidy this up, we replace the cat-related routes with a dedicated function:

routing {
    get("/status") {
        ...
    }
    catsRoutes()
}

We can now consolidate all our cat-related routes into...