Interface configuration information [ashx]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;

namespace WebApplication1
{
    /// <summary>
    /// wx 的摘要说明
    /// </summary>
    public class wx : IHttpHandler
    {       
        string Token = "www0430com";

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            //context.Response.Write("Hello World");

            if (string.IsNullOrEmpty(context.Request.QueryString["echoStr"])) { context.Response.End(); }

            string echoStr = context.Request.QueryString["echoStr"].ToString();

            if (CheckSignature(context))
            {
                if (!string.IsNullOrEmpty(echoStr))
                {
                    context.Response.Write(echoStr);
                    context.Response.End();
                }
            }
        }

        private bool CheckSignature(HttpContext context)
        {
            string signature = context.Request.QueryString["signature"].ToString();
            string timestamp = context.Request.QueryString["timestamp"].ToString();
            string nonce = context.Request.QueryString["nonce"].ToString();
            string[] ArrTmp = { Token, timestamp, nonce };
            Array.Sort(ArrTmp);　　 //字典排序  
            string tmpStr = string.Join("", ArrTmp);
            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
            tmpStr = tmpStr.ToLower();
            if (tmpStr == signature)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}