Hosting Nancy with Suave.IO

Nancy is a great choice for applications that want to run a lightweight HTTP server without the overhead of IIS. To do this, take the following steps.

Create your paket.references file for a new F# Console App:

FSharp.Core
Nancy.Owin

Run paket install and then; add an implementation to your console app:

namespace Suave.NancyFx

open Suave.Web
open Suave.Owin
open Nancy
open Nancy.Owin

type App() as x =
  inherit NancyModule()
  do
    x.Get.["/"] <- fun _ -> "Hello World, from NancyFx on Suave!" :> obj
    x.Get.["/fsharp"] <- fun _ -> "I can into F#" :> obj
    x.Get.["/json"] <- fun _ -> x.Response.AsJson([ "Test" ]) :> obj
    x.Get.["/complex"] <- fun _ -> 
      let response = x.Response.AsJson(["This is my Response"])
      response.ContentType <- "application/json"
      response.Headers.Add("Funky-Header", "Funky-Header-Value")
      response :> obj

module Program =

  [<EntryPoint>]
  let main argv =
    let opts = new NancyOptions()
    let app = OwinApp.ofMidFunc "/" (NancyMiddleware.UseNancy(opts))
    startWebServer defaultConfig app
    0

Run your app!

$ curl -i http://localhost:8083
HTTP/1.1 200 OK
Server: Suave/0.30.0.0 (http://suave.io)
Date: Mon, 31 Aug 2015 08:23:25 GMT
Content-Type: text/html
Content-Length: 35

Hello World, from NancyFx on Suave!

C# Example

using Suave;
using Nancy;
using Nancy.Owin;

namespace Suave.NancyFx
{
    public class SampleModule : NancyModule
    {
        public SampleModule()
        {
            Get["/"] = _ => "Hello World!";
        }
    }
    
    public class Program
    {
        public static int Main(string[] args)
        {
            var opts = new NancyOptions();
            var app = Suave.Owin.OwinAppModule.OfMidFunc("/", NancyMiddleware.UseNancy(opts));
            Web.startWebServer(Web.defaultConfig, app);
            return 0;
        }
    }
}