This example has a single endpoint, served at the root, that returns some text. It only uses the http4k-core module, which is small and has zero dependencies apart from the Kotlin StdLib.

GraalVM is a natural fit for http4k applications because of the lack of reflection/magic used throughout the library. This allows http4k to support native compilation with none of the detailed tweaking or complications that afflict other platforms.

There is a dependency, however, on the underlying server platform to also not use reflection and this is obviously something out of our control. Out-of-the-box compatibility is known to work for the following http4k server backends:

• ApacheServer (http4k-server-apache)
• SunHttp (bundled with http4k-core)

./gradlew clean test nativeCompile

./build/native/nativeCompile/helloworld

then:

curl -v http:https://localhost:8080/