HttpWebRequest to login to coldfusion site.

[twebb72]

Scratching my head for a while on this one... This project uses code from "Understand ing HttpWebRequest CookieContainer ?" post on this site.
C#, asp.net 2.0

The following code supplies credentials to the login page properly, if I change the POST credentials, it responds with the invalid login page. On the second get request (after a successful login), it continually redirects to the main page as if the session was over. Here is the code...

private static string FormLoginGet(string loginUri, string loginData, string requestUri)
        {
            // cookieContainer is used to store the cookies used by the login
            CookieContainer cookieContainer = new CookieContainer();

            // First hit the login page
            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(loginUri);
            req.CookieContainer = cookieContainer;
            req.Method = "POST";
            req.KeepAlive = false;
            req.AllowAutoRedirect = false;
            req.ContentType = "application/x-www-form-urlencoded|application/xml";
            ASCIIEncoding encoding = new ASCIIEncoding();
            byte[] loginDataBytes = encoding.GetBytes(loginData);
            req.ContentLength = loginDataBytes.Length;
            Stream stream = req.GetRequestStream();
            stream.Write(loginDataBytes, 0, loginDataBytes.Length);
            stream.Close();
            HttpWebResponse res = (HttpWebResponse)req.GetResponse();

         

            // Then grab the content of the desired page
            req = (HttpWebRequest)HttpWebRequest.Create(requestUri);
            req.AllowAutoRedirect = false;
            req.KeepAlive = false;
            req.CookieContainer = cookieContainer;
            req.Method = "GET";            
            res = (HttpWebResponse)req.GetResponse();



            if (res.StatusCode == HttpStatusCode.Found)
            {
                MessageBox.Show((string)res.Headers["Location"]);
            }


            StreamReader sr = new StreamReader(res.GetResponseStream());
            return sr.ReadToEnd();
        }

Thanks in advance! Any help would be much appreciated.

[twebb72]

I got it...
Step 1: Download and install Fiddler
Step 2: Realized cookie was created on the referring page, not the POST argument.
Step 3: Include a get for the referring page's cookie
Step 4: Success.

Clearly, HttpWebRequest really cannot be debugged easily without a program like fiddler. I suggest it to anyone having trouble. Lots of insight into the remote application's state.

Scratching my head for a while on this one... This project uses code from "Understand ing HttpWebRequest CookieContainer ?" post on this site.
C#, asp.net 2.0

The following code supplies credentials to the login page properly, if I change the POST credentials, it responds with the invalid login page. On the second get request (after a successful login), it continually redirects to the main page as if the session was over. Here is the code...

private static string FormLoginGet(string loginUri, string loginData, string requestUri)
        {
            // cookieContainer is used to store the cookies used by the login
            CookieContainer cookieContainer = new CookieContainer();

            // First hit the login page
            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(loginUri);
            req.CookieContainer = cookieContainer;
            req.Method = "POST";
            req.KeepAlive = false;
            req.AllowAutoRedirect = false;
            req.ContentType = "application/x-www-form-urlencoded|application/xml";
            ASCIIEncoding encoding = new ASCIIEncoding();
            byte[] loginDataBytes = encoding.GetBytes(loginData);
            req.ContentLength = loginDataBytes.Length;
            Stream stream = req.GetRequestStream();
            stream.Write(loginDataBytes, 0, loginDataBytes.Length);
            stream.Close();
            HttpWebResponse res = (HttpWebResponse)req.GetResponse();

         

            // Then grab the content of the desired page
            req = (HttpWebRequest)HttpWebRequest.Create(requestUri);
            req.AllowAutoRedirect = false;
            req.KeepAlive = false;
            req.CookieContainer = cookieContainer;
            req.Method = "GET";            
            res = (HttpWebResponse)req.GetResponse();



            if (res.StatusCode == HttpStatusCode.Found)
            {
                MessageBox.Show((string)res.Headers["Location"]);
            }


            StreamReader sr = new StreamReader(res.GetResponseStream());
            return sr.ReadToEnd();
        }

Thanks in advance! Any help would be much appreciated.