User1291168073 posted
Hi Allen,
I am trying the same technique but its not taking me to the logged in area and always shows the login control on the page.
The website that I am trying to monitor for its login availability is in Asp.net 2.0 with server side controls and forms authentication. The server side controls html generated has long name and I am using the same to provide values in the post data. Below
is my code snippet.
private void SchedularCallback(object e)
{
// first, request the login form to get the viewstate value
HttpWebRequest webRequest = WebRequest.Create(ConfigurationManager.AppSettings["LoginWebsiteURL"]) as HttpWebRequest;
StreamReader responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
string responseData = responseReader.ReadToEnd();
responseReader.Close();
// extract the viewstate value and build out POST data
string viewState = ExtractViewState(responseData);
string postData = String.Format(
"__VIEWSTATE={0}&ctl00$ctl00$ctl00$ContentPlaceHolderDefault$RACGPContent$ctl03$RACGP_LoginBody_15$RACGP_LoginBodyView$RACGP_LoginBody$UserName={1}&ctl00$ctl00$ctl00$ContentPlaceHolderDefault$RACGPContent$ctl03$RACGP_LoginBody_15$RACGP_LoginBodyView$RACGP_LoginBody$Password={2}&ctl00$ctl00$ctl00$ContentPlaceHolderDefault$RACGPContent$ctl03$RACGP_LoginBody_15$RACGP_LoginBodyView$RACGP_LoginBody$RACGP_LoginBodyButton:Log
me in&__VIEWSTATEGENERATOR:CA0B0334",
viewState, ConfigurationManager.AppSettings["LoginWebsiteUsername"], ConfigurationManager.AppSettings["LoginWebsitePwd"]
);
// have a cookie container ready to receive the forms auth cookie
CookieContainer cookies = new CookieContainer();
// now post to the login form
webRequest = WebRequest.Create(ConfigurationManager.AppSettings["LoginWebsiteURL"]) as HttpWebRequest;
webRequest.KeepAlive = true;
webRequest.AllowAutoRedirect = false;
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
byte[] dataBytes = UTF8Encoding.UTF8.GetBytes(postData);
webRequest.ContentLength = dataBytes.Length;
webRequest.CookieContainer = cookies;
// write the form values into the request message
StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream());
requestWriter.Write(postData);
requestWriter.Close();
responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream());
// and read the response
responseData = responseReader.ReadToEnd(); //Receiving the same Login page in this response. Based on this response I need to perform something
responseReader.Close();
}
private string ExtractViewState(string s)
{
string viewStateNameDelimiter = "__VIEWSTATE";
string valueDelimiter = "value=\"";
int viewStateNamePosition = s.IndexOf(viewStateNameDelimiter);
int viewStateValuePosition = s.IndexOf(valueDelimiter, viewStateNamePosition);
int viewStateStartPosition = viewStateValuePosition + valueDelimiter.Length;
int viewStateEndPosition = s.IndexOf("\"", viewStateStartPosition);
return HttpUtility.UrlEncodeUnicode(
s.Substring(
viewStateStartPosition,
viewStateEndPosition - viewStateStartPosition)
);
}
Please advice me what to do.
