CoffeeScriptHandler for ASP.Net

CoffeeScriptHandler.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Diagnostics;
using System.Web.Caching;
using System.IO;

namespace CoffeeScriptHandler
{
    public class CoffeeScriptHandler : IHttpHandler
    {
        private const string NODE_BIN = @"c:\node\bin\";
 
        public bool IsReusable
        {
            get { return true; }
        }

        public void ProcessRequest(HttpContext context)
        {
            ProcessRequest(new HttpContextWrapper(context));
        }

        public static void ProcessRequest(HttpContextWrapper context)
        {
            string path = context.Request.PhysicalPath;
            DateTime lastWrite = File.GetLastWriteTime(path);
            Cache cache = context.Cache;

            var cachedItem = ((Tuple<DateTime, string>)cache[path]);
            if (cachedItem == null || cachedItem.Item1 < lastWrite)
            {
                ProcessStartInfo psi = new ProcessStartInfo(NODE_BIN + "node.exe", "coffee -cs");
                psi.UseShellExecute = false;
                psi.RedirectStandardOutput = true;
                psi.RedirectStandardInput = true;
                psi.WorkingDirectory = NODE_BIN;
                
                Process process = Process.Start(psi);
                process.StandardInput.Write(File.ReadAllText(path));
                process.StandardInput.Close();
                process.WaitForExit();
            
                string result = process.StandardOutput.ReadToEnd();
                cache[path] = cachedItem = Tuple.Create<DateTime, string>(lastWrite, result);
            }
            context.Response.ContentType = "application/javascript";
            context.Response.Write(cachedItem.Item2);
        }
    }
}