httpwebresponse取不全cookie问题

Question

模拟登录JSP网页，目前能登录，也能采集到数据，但过15分钟左右就会网页超时！
httpwatch查看，登录后点击任意页面，Received回来的cookie中expires时间增加，但我取到的cookie只有JSESSIONID与PATH，不能取到expires。Headers Send:
Cookie        BIGipServerpool7001=218366218.22811.0000; JSESSIONID=0000l4kdLP1blfGLZZjNRGzGV-8:11b5cc0lm
Headers Received:
Set-Cookie    BIGipServerpool7001=218366218.22811.0000; expires=Thu, 27-Aug-2009 03:29:27 GMT; path=/response.Cookies与response.Headers["Set-Cookie"]都无法取到expires值

Answer 1

httpwatch ->cookies
Cookie Name               Direction         Value            Path            Expires    
BIGipServerpool7001         Sent     218366218.22811.0000
BIGipServerpool7001       Received   218366218.22811.0000      /   Thu, 27-Aug-2009 03:49:10 GMT
JSESSIONID                  Sent   0000l4kdLP1blfGLZZjNRGzGV-8:11b5cc0lm

Answer 2

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(Url);
myRequest.CookieContainer = new CookieContainer();HttpWebResponse response = (HttpWebResponse)myRequest.GetResponse();
string s= response.Cookies[""].Value;

Answer 3

response.Cookies["Expires"].Value 这样来取吗？

Answer 4

学习我也在研究这些东西，但我这里直接获得
 public void SetCookieContainer(CookieCollection CookieCC)
        {
            CookieCtainer.Add(CookieCC);
        }
        public void SetCookieCollection(CookieCollection CookieCC)
        {
            CookieCtion=CookieCC;
        } public string Login(string url, string strPost, RequestPPT rePpt)//string user, string password, string checkcode
        {
            string outHtml = "";
            try
            {
                byte[] data = Encoding.Default.GetBytes(strPost);
                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
                myRequest.Method = rePpt.Method;
                myRequest.ContentType = rePpt.ContentType;
                myRequest.CookieContainer = CookieCtainer;
                myRequest.ContentLength = data.Length;
                Stream newStream = myRequest.GetRequestStream();
                // Send the data.   
                newStream.Write(data, 0, data.Length);
                newStream.Close();                // Get response   
                HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
                StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.Default);
                outHtml = reader.ReadToEnd();
                SetCookieCollection(myResponse.Cookies);
                SetCookieContainer(myResponse.Cookies);
                return outHtml;
            }
            catch (Exception ee)
            {
                outHtml = ee.Message;
                return outHtml;
            }
        }
但不知道会不会解决问题，还有如果失效了，重新登入下继续用，失效会返回一个不是正常网页的错误 一旦有这个错误 我这里就重新调用Login 继续得到新的

Answer 5

我用webClient没碰到过这种事,除非这个cookie是调用js生成的

Answer 6

cookie能取到，主要该网站有验证码，无法重新登录！
目前怀疑cookie过期的问题，我去到的cookie里只有JSESSIONID与PATH，没有其他值。
但带这个cookie去抓取数据，还是成功的，那SESSIONID肯定是对的。
cookie内是否必定有Expires值？
        public CookieCollection cookieCol;
        public void AddCookieWithCookieHead(ref CookieCollection cookieCol, string cookieHead, string defaultDomain)
        {
            if (cookieCol == null) cookieCol = new CookieCollection();
            if (cookieHead == null) return;
            string[] ary = cookieHead.Split(';');
            for (int i = 0; i < ary.Length; i++)
            {
                Cookie ck = GetCookieFromString(ary[i].Trim(), defaultDomain);
                if (ck != null)
                {
                    cookieCol.Add(ck);
                }   
            }
        }
        取到的cookie内容如下：
        cookieCol.Count.ToString() = 2
        cookieCol[0].Name = JSESSIONID
        cookieCol[1].Name = PATH