http4k Examples

These sample projects are designed to demonstrate how easy it is to use the various features of http4k in isolation. They are all entirely self-contained and can be run locally or using the included script to run them in a Docker container.

• hello-world : "Hello world" application with a single endpoint.

• aws-lambda-custom-runtime: Building and deploying HttpHandler as a Serverless function with the lightweight http4k custom runtime (on Graviton).

• aws-lambda-http: Building and deploying HttpHandler as a Serverless function.

• aws-lambda-events: Building and deploying an event-based FnHandler as a Serverless function.

• graalvm : "Hello world" application with a single endpoint, compiled to a native binary using GraalVM.

• graphql : Using the http4k graphql routing module to build an API which exposes a data graph backed by the GraphQL-Java library.

• hexagonal: Writing Hexagonal http4k applications with DomainDrivenTests.

• hexagonal-arrow: Writing Hexagonal http4k applications with Functional Error Handling via Arrow with DomainDrivenTests.

• hotwire : Serve a Hotwire application via http4k (with Websocket support)!

• http4k-connect : A app which utilises the http4k-connect libraries, which provide both a framework for http4k client connectors to external systems and Fake versions of those systems.

• json-api : A app which uses Jackson to automatically marshall Kotlin data classes into JSON objects.

• oauth : Using the http4k OAuth support, shows how to protect resources for use with an external auth provider such as Google or Auth0.

• openapi : Using the http4k contract routing module to build an API which is auto-documented in a generated OpenAPI3 specification.

• quarkus : "Hello world" application with a single endpoint, compiled to a native binary using Quarkus.

• react-app : Combines a React front end with an http4k backend.

• typesafe-configuration : Application configured using the typesafe configuration facility in the http4k-cloudnative module..

• web-content : Using the http4k templating system and serving static content.

• bearer-auth : Use nimbus-jose-jwt to secure an API with bearer authentication