C# - How to check if a user logged in into a web u

问题:

I have written a C# function using HttpWebRequest that checks if a user successfully logged in to a web and how much time in Milliseconds it took him to log in. The problem is, that even though I used try and catch, when I enter the wrong Username and Password it's still not going to catch and I can't verify if it succeeded. How can I check if the user actually logged in successfully?

private int[] LoginCheck(string TargetWebApp)
        {
            int[] result = new int[2];
            var watch = System.Diagnostics.Stopwatch.StartNew();
            try
            {


                string formUrl = "https://XXXXX.com/user/login/default"; // NOTE: This is the URL the form POSTs to, not the URL of the form (you can find this in the "action" attribute of the HTML's form tag
                string formParams = string.Format("email_address={0}&password={1}", "XXXXX", "XXXXX");
                string cookieHeader;
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(formUrl);
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
                req.ContentType = "application/x-www-form-urlencoded";
                req.Method = "POST";
                byte[] bytes = Encoding.ASCII.GetBytes(formParams);
                req.ContentLength = bytes.Length;
                using (Stream os = req.GetRequestStream())
                {
                    os.Write(bytes, 0, bytes.Length);
                }
                HttpWebResponse resp = req.GetResponse() as HttpWebResponse;;
                var elapsedMs = watch.ElapsedMilliseconds;
                watch.Stop();
                Console.WriteLine("Login to WebApp succeed in {0} Milliseconds", elapsedMs);
                cookieHeader = resp.Headers["Set-cookie"];
                result[0] = 1;
                result[1] = (int)elapsedMs;

            }
            catch (Exception e)
            {
                //Any exception will return false.
                Console.WriteLine(e.Message);
                result[0] = 0;
                result[1] = 0;
            }

            return result;
        }

回答1:

You should use below code to get status of response , responseCode 401 is for unauthorized response.

var isInvalidAccess = resp.StatusCode == HttpStatusCode.Unauthorized;