Sample ASP.NET IHttpHandler implementation

SampleHandler.ashx

<%@ WebHandler Language="C#" Class="SampleHandler" %>
using System;
using System.Web;
using System.Web.Script.Serialization;
using System.Linq;
using System.Reflection;
using System.Collections.Generic;

namespace WECC
{
    public class SampleHandler : IHttpHandler
    {
        protected HttpContext Context = null;
	    protected static readonly object[] EmptyObjectArray = new object[] { };
        protected static JavaScriptSerializer serializer = null;
        protected static Dictionary<string, MethodInfo> methodTable = null;

        public bool IsReusable { get { return false; } }
        
        // any public method that returns a JSON string becomes a valid action
            
        public void ProcessRequest(HttpContext context)
        {
            Context = context;
            serializer = serializer != null ? serializer : new JavaScriptSerializer();
            
            if (methodTable == null)
            {
                methodTable = new Dictionary<string, MethodInfo>();
                this.GetType()
                    .GetMethods(BindingFlags.Instance | BindingFlags.Public)
                    .Where(m => m.ReturnType == typeof(String))
                    .ToList()
                    .ForEach(m => methodTable.Add(m.Name, m));
            }
            
            try
            {
                if (context.Request.PathInfo != null && context.Request.PathInfo.Length > 0)
		        {
			        var action = context.Request.PathInfo.Substring(1);
                	if (methodTable.ContainsKey(action))
                	{
				        context.Response.Write(methodTable[action].Invoke(this, EmptyObjectArray) as string);
                	} else {
				        throw new Exception("Unknown action");
			        }
		        } else {
			        throw new Exception("Action Required - TODO: Add RESTful response to resources");
		        }			
            } 
            catch (Exception ex)
            {
                var json = serializer.Serialize(new
                {
                    error = new
                    {
                        Message = ex.InnerException == null ? ex.Message : ex.InnerException.Message,
                        Stack = ex.InnerException == null ? ex.StackTrace : ex.InnerException.StackTrace,
                        InnerException = (ex.InnerException!=null)?ex.InnerException.Message:""
                    }
                });
                context.Response.Write(json);
            }
        }
    }
}