FunctionalWeb Applicationsusing

F# and Suave

@TomasJansson

BEKKDeveloperPractice lead .NET

OsloFSharp/NNUGMicrosoft MVPF# enthusiast

F#?

Flickr: Supportive / Scott Robinson/ Creative Commons

Solid foundation

Flickr: Lego Bricks/ Benjamin Esham / Creative Commons

Composability

Flickr: Lego Set 10143 Death Star Todesstern / Dude of Lego/ Creative Commons

Composability

Feedback

Why F# and Web?

All applications are functions,also web applications

Server

Request

Response

ServerRequest Response

FunctionInput Output

?

Suave is a lightweight, non-blocking web server. The non-blocking I/O model is efficient and suitable for building fast, scalable network applications. In fact, Suave is written in a completely non-blocking fashion throughout. Suave runs on Linux, OS X and Windows flawlessly.

https://suave.io/

HttpContextWebPartCombinators

HttpContext

WebPart

WebPart

Combinators

Combinators… that create a WebPart from more primitive values

… that combine multiple WebParts to a single WebPart

Model (simplified)

fun funfun

1. Start with some functions or values

WebPartWebPartWebPart

Model (simplified)

fun funfun

1. Start with some functions or values2. Apply one or more combinator to each function or value to create some WebParts

WebPart

Model (simplified)1. Start with some functions or values2. Apply one or more combinator to each function or value to create some WebParts3. Apply a combinator to the WebParts to create a single WebPart (repeat if needed)

WebPartWebPartWebPart

fun funfun

Demo

Demo

http://fsharp.github.io/FAKE/ http://fsprojects.github.io/Paket/

Paket FAKE

Summary

F# is awesome

F# is awesomeThe web is functional

F# is awesomeThe web is functionalProgram the web using Suave

Resourceshttps://suave.io/

https://github.com/SuaveIO/suave

https://www.gitbook.com/book/theimowski/suave-music-store/

https://github.com/mastoj/my-share

FP Lab HourRoom 10 at

13:40

?

@TomasJanssongithub.com/mastojslideshare.net/mastoj