香港空间的确很坑，网站可用性只有72.37%

今天测了下自己买的香港空间，每隔1分钟获取下网站内容，试了76次，只有55次成功拿到网页。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace getsites
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 1;
            while (true)
            {
                Console.WriteLine("Round:"+i.ToString()+Environment.NewLine);
                string result = DownLoad_HTML.GetHtml("http://www.xxx.com/");
                System.IO.File.AppendAllText(i.ToString() + ".html", result);
                Thread.Sleep(60 * 1000);
                i++;
            }
        }
    }

    public static class DownLoad_HTML
    {
        private static int FailCount = 0; //记录下载失败的次数

        public static string GetHtml(string url) //传入要下载的网址
        {
            string str = string.Empty;
            try
            {
                System.Net.WebRequest request = System.Net.WebRequest.Create(url);
                request.Timeout = 10000; //下载超时时间
                request.Headers.Set("Pragma", "no-cache");
                System.Net.WebResponse response = request.GetResponse();
                System.IO.Stream streamReceive = response.GetResponseStream();
                Encoding encoding = Encoding.GetEncoding("gb2312");//utf-8 网页文字编码
                System.IO.StreamReader streamReader = new System.IO.StreamReader(streamReceive, encoding);
                str = streamReader.ReadToEnd();
                streamReader.Close();
            }
            catch (Exception ex)
            {
                FailCount++;

                if (FailCount > 5)
                {
                    System.IO.File.AppendAllText("error.log", "已下载失败" + FailCount + "次");
                }
                else
                {
                    str = GetHtml(url);
                }
            }

            FailCount = 0; //如果能执行到这一步就表示下载终于成功了
            return str;
        }
    }
}