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. Cask makes it easy to set up a website, backend server, or REST API using Scala

• 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

• Update examples to build with Mill 1.x
• Example zips are now hosted on Maven Central rather than Github Releases

• Add a helper method to create a dedicated virtual thread scheduler. #164

• Support for Java21/Loom Virtual Threads #161, see Running Cask with Virtual Threads

• Fix path traversal issue when serving static files #157
• Fix form submissions with empty file fields throwing exceptions #150
• Add CI testing for Java 17 and 21 #156

• Allow overlap between static routes and wildcards #134

• Introduce @postJsonCached to allow reference to the original body payload in @postJson #123

• Properly decode URL parameters when passed as path segments or query params #114

• Preserve leading slash when resolving static paths #111

• Add cask.QueryParams type to allow route methods to take arbitrary query parameters, add cask.RemainingPathSegments as replacement for subpath = true #108 #109 #110

• Update org.xerial:sqlite-jdbc library in examples to version 3.41.2.1 to
  support Apple Silicon
• @staticResources and @staticFiles decorators now automatically infer content types based on file extension

• Update uPickle to 3.0.0
• Update Geny to 1.0.0
• Update Scala 3 to 3.2.2
• Update Scala.js to 1.13.0
• Update SourceCode to 0.3.0
• Update PPrint to 0.8.1
• Update Castor to 0.3.0

• Fix error reporting for invalid routes #70

• Bump uPickle to 1.6.0

• Publish Cask for Scala 2.12 again

• Improve handling on 404/405 responses with unsupported methods (#52)

• Fix example project zips

• Update Castor to 0.1.8
• Add @cask.options decorator

• 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