Simple File Server Pipeline
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open System.IO | |
open Freya.Core | |
open Freya.Core.Operators | |
open Freya.Machines.Http | |
open Freya.Routers.Uri.Template | |
open Freya.Types.Http | |
// Configuration | |
let fileTypes = | |
Map.ofList [ | |
".gif", MediaType.parse "image/gif" | |
".html", MediaType.parse "text/html" | |
".png", MediaType.parse "image/png" ] | |
// Optics | |
let fileRoot_ = | |
State.value_ "freya.FileServer.Root" | |
let fileSegments_ = | |
Route.list_ "segments" | |
// Properties | |
let fileRoot = | |
Freya.memo (Option.get <!> Freya.Optic.get fileRoot_) | |
let filePath = | |
Freya.memo (Option.get <!> Freya.Optic.get fileSegments_) | |
let fileInfo = | |
Freya.memo ((fun x y -> FileInfo (Path.Combine (Array.ofSeq (x :: y)))) <!> fileRoot <*> filePath) | |
// Decisions | |
let fileExists = | |
(fun (x: FileInfo) -> x.Exists) <!> fileInfo | |
// Handlers | |
let fileOk = | |
(fun (x: FileInfo) -> | |
{ Data = File.ReadAllBytes x.FullName | |
Description = | |
{ Charset = None | |
Encodings = None | |
MediaType = Map.tryFind x.Extension fileTypes | |
Languages = None } }) <!> fileInfo | |
// Resources | |
let fileResource = | |
freyaMachine { | |
exists fileExists | |
methods [ GET; HEAD; OPTIONS ] | |
handleOk fileOk } | |
// Routers | |
let fileRouter = | |
freyaRouter { | |
resource "{/segments*}" fileResource } | |
// Server | |
let fileServer root = | |
Freya.Optic.set fileRoot_ (Some root) >?= fileRouter | |
// Type | |
open System | |
open Microsoft.Owin.Hosting | |
type FileServer () = | |
member __.Configuration () = | |
OwinAppFunc.ofFreya (fileServer @"Z:\Code\kolektiv\freya\stack\machines\docs\http\html") | |
// Main | |
[<EntryPoint>] | |
let main _ = | |
let _ = WebApp.Start<FileServer> ("http://localhost:7000") | |
let _ = Console.ReadLine () | |
0 |
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