httpwebrequest 登录采集

闲游四疯 2017-10-20 03:21:05

winfrom 去获取一个网页源代码需要先登，自己代码怎么试都不行，谁有可用的代码发个或者帮我分析下是不是哪里做错了？
思路就是先post登录获取CookieContainer，然后传到下一个请求，获取实际要的源代码？谁能帮我分析下谢谢



CookieContainer cookie = new CookieContainer();

 UtilsRequest.GetPostCookie("http://www.uu354.com/login.aspx", parms,ref cookie);

richTextBox3.Text = UtilsRequest.GetPost("http://www.uu354.com/Member/DanHaoSearch.aspx", null, cookie);



public static string GetPostCookie(string url, Dictionary<string, object> parms, ref CookieContainer cookie)

        {

            string htmlCode = String.Empty;

            HttpWebRequest webRequest = null;

            HttpWebResponse webResponse = null;

            try

            {

                ASCIIEncoding encoding = new ASCIIEncoding();

                byte[] postData = encoding.GetBytes(GetPostParms(parms));



                Uri uri = new Uri(url);

                webRequest = System.Net.WebRequest.Create(uri) as HttpWebRequest;

                webRequest.Timeout = 30000;

                webRequest.Method = "POST";

                webRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36";

                webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";

                webRequest.ContentType = "application/x-www-form-urlencoded";

                webRequest.ContentLength = postData.Length;

                webRequest.CookieContainer = cookie;

                webRequest.AllowAutoRedirect = true;

                webRequest.KeepAlive = true;



                Stream outputStream = webRequest.GetRequestStream();

                outputStream.Write(postData, 0, postData.Length);

                outputStream.Close();



                webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();

                webResponse.Cookies = webRequest.CookieContainer.GetCookies(webRequest.RequestUri);



                using (StreamReader sr = new StreamReader(webResponse.GetResponseStream(), GetEncoding(webResponse)))

                {

                    htmlCode = sr.ReadToEnd();

                }

            }

            catch { }

            finally

            {

                if (webRequest != null) webRequest.Abort();

                if (webResponse != null) webResponse.Close();

            }



            return htmlCode;

        }