object MinimalApplication extends cask.MainRoutes{
  @cask.get("/")
  def hello() = {
    "Hello World!"
  }

  @cask.post("/do-thing")
  def doThing(request: cask.Request) = {
    request.text().reverse
  }

  initialize()
}

Cask is a simple Scala web framework inspired by Python's Flask project. It aims to bring simplicity, flexibility and ease-of-use to Scala webservers, avoiding cryptic DSLs or complicated asynchrony.

• Documentation

If you use Cask and like it, you will probably enjoy the following book by the Author:

• Hands-on Scala Programming

Hands-on Scala has uses Requests-Scala extensively throughout the book, and has the entirety of Chapter 14: Simple Web and API Servers dedicated to the library. Hands-on Scala is a great way to level up your skills in Scala in general and Cask in particular.

Cask is profiled using the JProfiler Java Profiler, courtesy of EJ Technologies

• Build for Scala 3.0.0

• Return 405 for unsupported HTTP methods
• Upgrade Scala versions to 2.13.5 and 3.0.0-RC3

• Add support for Scala 3.0.0-RC2

• Upgrade undertow
• Add support for Scala 3.0.0-M2

• Fix published examples

• Add support for Dotty (to be Scala 3)

• Bump Mill version to 0.8.0

• Make Cask actorContext explicitly passed into every Routes case class

• Add support for geny.Writable#httpContentType and geny.Writable#contentLength

• Add endpoints for delete and patch
• Allow arbitrary HTTP methods

• Bump uPickle, Requests versions

• Add SameSite cookie attribute
• Fix bug in default parameters of cask routes

• Extract cask-actor into its own repo and artifact, https://github.com/lihaoyi/castor

• Separate cask-actor into a separate artifact, documented separately as Cask Actors

• Support for Scala 2.13.2

• Mismatched decorator types applied to a single method is now a compile error

• staticFiles and staticResources now allows you to specify response headers

• Allow cask.decorators.compress to be used as a cask.Routes or cask.Main decorator without crashing on websocket responses

• Allow decorators to be defined and used for non-cask.Response results

• Fix crashes in cask.WebsocketClientImpl

• Provide a simple cross-platform builtin websocket client in cask.WsClient

• Make Routes#log implicit

• Cross-publish cask.util for Scala.js

• Embed concurrent.ExecutionContext.global in cask.Routes by default, to be overriden if necessary

• Internal refactoring to clean up routing logic

• Standardize on a basic cask.Logger interface
• Create a simple actor-based API for handling websockets in cask.WsHandler and cask.WsActor

• cask.Response is now covariant

• Use standard ./mill bootstrap script

• Support for Scala 2.13.0