c# 模拟 网页实现12306登陆、自动刷票、自动抢票完全篇(转)

/// <summary>
    /// 模拟网页操作,提交、获取订单页面数据
    /// </summary>
    public class HttpWebRequestExtension
    {
        private static string contentType = "application/x-www-form-urlencoded";
        private static string accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";
        private static string userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; Zune 4.7; BOIE9;ZHCN)";
        private static string referer = "https://kyfw.12306.cn/";
        /// <summary>
        /// 提交订单数据
        /// </summary>
        /// <param name="url"></param>
        /// <param name="cookie"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static string PostWebContent(string url, CookieContainer cookie, string param)
        {
            byte[] bs = Encoding.ASCII.GetBytes(param);
            var httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
            httpWebRequest.CookieContainer = cookie;
            httpWebRequest.ContentType = contentType;
            httpWebRequest.Accept = accept;
            httpWebRequest.UserAgent = userAgent;
            httpWebRequest.Method = "POST";
            httpWebRequest.ContentLength = bs.Length;
            using (Stream reqStream = httpWebRequest.GetRequestStream())
            {
                reqStream.Write(bs, 0, bs.Length);
            }
            var httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            Stream responseStream = httpWebResponse.GetResponseStream();
            StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
            string html = streamReader.ReadToEnd();

            streamReader.Close();
            responseStream.Close();

            httpWebRequest.Abort();
            httpWebResponse.Close();

            return html;
        }

        /// <summary>
        /// 获取页面数据
        /// </summary>
        /// <param name="url"></param>
        /// <param name="cookie"></param>
        /// <returns></returns>
        public static string GetWebContent(string url, CookieContainer cookie)
        { 
            var httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
            httpWebRequest.CookieContainer = cookie;
            httpWebRequest.ContentType = contentType;
            httpWebRequest.Referer = referer;
            httpWebRequest.Accept = accept;
            httpWebRequest.UserAgent = userAgent;
            httpWebRequest.Method = "GET";
            httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;

            var httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            Stream responseStream = httpWebResponse.GetResponseStream();
            StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
            string html = streamReader.ReadToEnd();

            streamReader.Close();
            responseStream.Close();

            httpWebRequest.Abort();
            httpWebResponse.Close();

            return html;
        }

        /// <summary>
        /// 获取网页验证码图片
        /// </summary>
        /// <param name="url"></param>
        /// <param name="cookie"></param>
        /// <returns></returns>
        public static object GetWebImage(string url, CookieContainer cookie)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Referer = referer;
            request.UserAgent = "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36";
            request.Accept = "image/webp,*/*;q=0.8";
            request.CookieContainer = cookie;
            request.ContentType = contentType;
            request.KeepAlive = true;
            request.UseDefaultCredentials = true;
          //  request.Proxy = null;
            return request.GetResponse().GetResponseStream();
        }
    }