取网页内容拼分析

C# code

        public XmlNode GetStudentInfo(string ID, string psw, out Stream Photo)        {            XmlDocument xdoc = new XmlDocument();            XmlNode StdInfo = xdoc.CreateElement("StudentInfo");            XmlNode xtmp = xdoc.CreateElement("xtml");            XmlAttribute xatt;            string __EVENTTARGET, __EVENTARGUMENT, __LASTFOCUS, __VIEWSTATE, __PREVIOUSPAGE, __EVENTVALIDATION;            HttpWebRequest req;            HttpWebResponse resp;            Cookie AUTH, ROLES;            Regex rg;            string PostFrame, PostArgs, PostData, RecData;            byte[] buf;            req = HttpWebRequest.Create(@"http://IP/home.aspx") as HttpWebRequest;            resp = req.GetResponse() as HttpWebResponse;            RecData = new StreamReader(resp.GetResponseStream()).ReadToEnd();            GetField(RecData, out __EVENTTARGET, out __EVENTARGUMENT, out __LASTFOCUS, out __VIEWSTATE, out __PREVIOUSPAGE, out __EVENTVALIDATION);            req = HttpWebRequest.Create(@"http://IP/home.aspx") as HttpWebRequest;            req.Method = "POST";            req.ContentType = "application/x-www-form-urlencoded";            req.AllowAutoRedirect = false;            PostArgs = string.Format(Properties.Resources.PostLoginArgs, ID, psw);            PostData = string.Format(Properties.Resources.PostFrame, "", "", __LASTFOCUS, __VIEWSTATE, PostArgs, __PREVIOUSPAGE, __EVENTVALIDATION) + Properties.Resources.PostLoginButtonArg;            buf = Encoding.UTF8.GetBytes(PostData);            req.ContentLength = buf.Length;            req.GetRequestStream().Write(buf, 0, buf.Length);            resp = req.GetResponse() as HttpWebResponse;            string[] cp = resp.Headers["Set-Cookie"].Split(';')[0].Split('=');            AUTH = new Cookie(cp[0], cp[1], "/", "IP");            req = HttpWebRequest.Create(@"http://IP/middle.aspx") as HttpWebRequest;            req.AllowAutoRedirect = false;            req.CookieContainer = new CookieContainer();            req.CookieContainer.Add(AUTH);            resp = req.GetResponse() as HttpWebResponse;            cp = resp.Headers["Set-Cookie"].Split(';')[0].Split('=');            ROLES = new Cookie(cp[0], cp[1], "/", "IP");            HttpWebRequest hr = HttpWebRequest.Create(@"http://IP/StudentUI/StuFunction/xj_infcheck.aspx") as HttpWebRequest;            req = HttpWebRequest.Create(@"http://IP/StudentUI/StuFunction/xj_infcheck.aspx") as HttpWebRequest;            req.CookieContainer = new CookieContainer();            req.CookieContainer.Add(AUTH);            req.CookieContainer.Add(ROLES);            resp = req.GetResponse() as HttpWebResponse;//如果没有记错，就是这个地方超时            RecData = new StreamReader(resp.GetResponseStream()).ReadToEnd();            rg = new Regex(@"<input name=""ctl00/$ContentPlaceHolder1/$.*?"" type=""text"" value="".*?"" .*?/>");            MatchCollection mc = rg.Matches(RecData);            foreach(Match item in mc)            {                xtmp.InnerXml = item.Value;                xatt = xdoc.CreateAttribute(xtmp.FirstChild.Attributes["name"].Value.Substring(28));                xatt.Value = xtmp.FirstChild.Attributes["value"].Value;                StdInfo.Attributes.Append(xatt);            }            rg = new Regex(@"(?<=<img id=""ctl00_ContentPlaceHolder1_imZP"" src=""../../).*?(?="" alt)");            req = HttpWebRequest.Create(@"http://IP/" + System.Web.HttpUtility.HtmlDecode(rg.Match(RecData).Value)) as HttpWebRequest;            req.CookieContainer = new CookieContainer();            req.CookieContainer.Add(AUTH);            req.CookieContainer.Add(ROLES);            Photo = req.GetResponse().GetResponseStream();            return StdInfo;        }        static void GetField(string Data, out string __EVENTTARGET, out string __EVENTARGUMENT, out string __LASTFOCUS, out string __VIEWSTATE, out string __PREVIOUSPAGE, out string __EVENTVALIDATION)        {            __EVENTTARGET = null;            __EVENTARGUMENT = null;            __LASTFOCUS = null;            __VIEWSTATE = null;            __PREVIOUSPAGE = null;            __EVENTVALIDATION = null;            Regex rg = new Regex(@"<input type=""hidden"" name=""__.*/>");            MatchCollection mc = rg.Matches(Data);            foreach(Match item in mc)            {                XmlDocument xdoc = new XmlDocument();                xdoc.InnerXml = item.Value;                string name = xdoc.FirstChild.Attributes["name"].Value;                string value = xdoc.FirstChild.Attributes["value"].Value;                switch(name)                {                    case "__EVENTTARGET":                        __EVENTTARGET = value;                        break;                    case "__EVENTARGUMENT":                        __EVENTARGUMENT = value;                        break;                    case "__VIEWSTATE":                        __VIEWSTATE = value;                        break;                    case "__PREVIOUSPAGE":                        __PREVIOUSPAGE = value;                        break;                    case "__EVENTVALIDATION":                        __EVENTVALIDATION = value;                        break;                }            }            __EVENTTARGET = System.Web.HttpUtility.UrlEncode(__EVENTTARGET);            __EVENTARGUMENT = System.Web.HttpUtility.UrlEncode(__EVENTARGUMENT);            __LASTFOCUS = System.Web.HttpUtility.UrlEncode(__LASTFOCUS);            __VIEWSTATE = System.Web.HttpUtility.UrlEncode(__VIEWSTATE);            __PREVIOUSPAGE = System.Web.HttpUtility.UrlEncode(__PREVIOUSPAGE);            __EVENTVALIDATION = System.Web.HttpUtility.UrlEncode(__EVENTVALIDATION);        }    }