http4k Modules overview

Core functionality

Core OpenAPI Contracts Multipart Forms GraphQL

HTTP Server Backends

Apache 4 & 5 Jetty Ktor CIO & Netty Netty Ratpack SunHttp Undertow

HTTP Serverless Backends

Alibaba Function Compute Apache OpenWhisk AWS Lambda Azure Functions Google Cloud Functions Tencent Serverless Cloud Functions

HTTP Clients

Apache4 Sync & Async Apache5 Sync & Async Java Jetty OkHttp Websocket

Messaging formats

Argo Gson Gson XML Jackson Jackson XML Jackson YAML JSON RPC KotlinX Serialisation Klaxon Moshi

Templating libraries

Dust Freemarker Handlebars Jade4j Pebble Thymeleaf

Cloud-Native & Observability

AWS Cloud Native OAuth Micrometer OpenTelemetry Resilience4J

Testing

Approval Testing Chaos Monkey Hamkrest Kotest Servirtium WebDriver