scriptcs web api w/ controller that lists directory contents

csharp-web-server-sample.csx

using System.IO;
using System.Reflection;
using System.Web.Http;
using System.Web.Http.SelfHost;
using System.Web.Http.Dispatcher;

public class ControllerResolver : DefaultHttpControllerTypeResolver
{
    public override ICollection<Type> GetControllerTypes(IAssembliesResolver assembliesResolver)
    {
        return Assembly.GetExecutingAssembly().GetTypes()
            .Where(x => typeof(System.Web.Http.Controllers.IHttpController).IsAssignableFrom(x)).ToList();
    }
}
var config = new HttpSelfHostConfiguration(new Uri("http://localhost:8090"));
config.Services.Replace(typeof(IHttpControllerTypeResolver), new ControllerResolver());
config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}",
    defaults: new { id = RouteParameter.Optional });

public class FileSystemController : ApiController
{
    public string[] Get(string dir = @"D:\")
    {
        var fileEntries = Directory.GetFiles(dir);
        return fileEntries;
    }
}

new HttpSelfHostServer(config).OpenAsync().Wait();
Console.WriteLine("Listening...");
Console.ReadKey();

example-startup.cs

void Main()
{
  var script = new Process();
  script.StartInfo.FileName = "scriptcs";
  script.StartInfo.CreateNoWindow = true;
  script.StartInfo.Verb = "runas";
  script.StartInfo.Arguments = @"csharp-web-server-sample.csx";  
  script.Start();

  var proxy = new Process();
  proxy.StartInfo.FileName = "ngrok";
  proxy.StartInfo.CreateNoWindow = true;
  proxy.StartInfo.Arguments = "http 8090";
  proxy.Start();
}

scriptcs_packages.config.xml

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.SelfHost" version="5.2.2" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" />
</packages>

startproxy.bat

ngrok http 8090

startserver.bat

:: start from the cli
scriptcs -install
scriptcs csharp-web-server-sample.csx

Requirements

choco install scriptcs
npm i -g ngrok