Web/Tools/Captcha.ashx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.SessionState;
using System.Net;
using System.IO;

namespace Web.Tools
{
    /// <summary>
    /// Captcha 的摘要说明
    /// </summary>
    public class Captcha : IHttpHandler, IRequiresSessionState
    {

        public void ProcessRequest(HttpContext context)
        {
            string photo=null;
            if (context.Request["photo"] != null)
            {
                 photo = context.Request["photo"].ToString();
            }
            if (!string.IsNullOrEmpty(photo))
            {
                BLL.Member memberbll = new BLL.Member();
                if (memberbll.Exists(photo))
                {
                    context.Response.Write(22);
                    return;
                }
            }
            string user = "50297";
            string pass = "guangjuguangju88";
            string cellNumber = context.Request.QueryString["cell"];
            string validateCode = context.Request.QueryString["validateCode"];
            string passmd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(pass, "MD5");
            string url = " http://210.5.158.31/hy?uid=" + user + "&auth=" + passmd5 + "&mobile=" + cellNumber + "&expid=0&msg=";
            string randomNumber = getRandomNumber();
            string content = "";
            if (validateCode == null || validateCode == "")
            {
                validateCode = randomNumber;
            }
            content += "验证码【" + validateCode + "】";
            System.Text.Encoding encode = System.Text.Encoding.GetEncoding("GBK");
            content = HttpUtility.UrlEncode(content, encode);
            url += content;

            context.Session["validataCode"] = validateCode;
            //Response.Write(url);
            //test用 
            //Response.Write("{\"code\":" + validateCode + ",\"result\":\"0\"}");
            GetHtmlFromUrl(url, validateCode, context);
        }
        public string GetHtmlFromUrl(string url, string randomNumber, HttpContext context)
        {
            string strRet = null;

            if (url == null || url.Trim().ToString() == "")
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