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Communicating with web application from windows application with out using web service

Posted on 2010-09-03
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Last Modified: 2012-05-10
Hi,

I am working with a windows application where i need to pass login name and password to a web application and get result from that web application whether that passed login and password are valid or invalid.

I dont have any information on web services exposed that web application. SO i can not consume the web service.

But still i wnt to get the result. How can I handle this.

Please provide the answer ASAP.

Thanks,
Srinivas Mateti
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Question by:futurebuilders
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Accepted Solution

by:
madgino earned 500 total points
ID: 33602185
You can make a http request and read the response, it shouldn't be very complicated using .NET.
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Author Comment

by:futurebuilders
ID: 33602192
If in that case can u plase provide some sample code.it will be helpful to my work.


Thanks in advance
Srinivas Mateti
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Assisted Solution

by:madgino
madgino earned 500 total points
ID: 33602910
So first you need to see how the website handles the POST and which fields are submitted (usually there are username & passowrd). For this you need to have a debugger/proxy to show you the POST data, I would recommend you fiddler (http://www.fiddler2.com/fiddler2/).
So install fiddler, go to the website and login. When you press the login button check in fiddler the POST variables that are used.

Then you create a similar post in your application with the same POST variables, you have here some examples:
http://www.netomatix.com/httppostdata.aspx
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Author Comment

by:futurebuilders
ID: 33603241
thanks for your response.

So my client application is windows aplication.I am unable to use HTTPRequest class in windows application.

Your solution will work in web application or it will work in windows also?

Please clarify my doubt.

If it works for windows application also then how can i use httprequest class in windows application

Thanks
Srinivas Mateti
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LVL 11

Assisted Solution

by:madgino
madgino earned 500 total points
ID: 33603358
You can use HttpWebRequest from windows application, it's in System.Net.

You have attached the function that I'm using in my windows app. The difference is that I'm doing a simple GET you must do a POST like in the other examples.

public static string GetPage(string strURL)

        {

            try

            {



                //get main page

                byte retries = 0;

                retry:



                HttpWebRequest wRequest = (HttpWebRequest)WebRequest.Create(strURL);



                wRequest.Proxy = WebRequest.GetSystemWebProxy();

                wRequest.Proxy.Credentials = CredentialCache.DefaultCredentials;

                wRequest.Credentials = CredentialCache.DefaultCredentials;

                wRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)";

                wRequest.CookieContainer = new CookieContainer();



                Uri swUri = new Uri(strURL);

                

                HttpWebResponse wResponse;

           

                try

                {

                    wResponse = (HttpWebResponse)wRequest.GetResponse();

                }

                catch (WebException ex)

                {

                    //let's log the error

                    retries++;

                    if (retries > 2) throw ex;

                    goto retry;

                }



                Encoding enc;

                if ((wResponse.ContentEncoding != null) && (wResponse.ContentEncoding.Length > 0))

                {

                    enc = Encoding.GetEncoding(wResponse.ContentEncoding);

                }

                else if ((wResponse.CharacterSet != null) && (wResponse.CharacterSet.Length > 0))

                {

                    enc = Encoding.GetEncoding(wResponse.CharacterSet);

                }

                else

                {

                    //enc = Encoding.GetEncoding(1252);  // Windows default Code Page

                    enc = Encoding.GetEncoding("utf-8");

                }



                StreamReader loResponseStream = new StreamReader(wResponse.GetResponseStream(), enc);



                string strHtml = loResponseStream.ReadToEnd();



                wResponse.Close();

                loResponseStream.Close();



                return strHtml;



            }

            catch (Exception ex)

            {

                Utilities.LogError("Error on " + strURL + " =>" + ex.Message.ToString(), ex.StackTrace.ToString(), false);

            }

            finally

            {

            }

            return "";



        }

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Author Comment

by:futurebuilders
ID: 33604248
Hi,

Here again a issue. My taget url contains 2 web sites.

Please see my url "https://us.battle.net/login/en/login.xml?ref=https://www.worldofwarcraft.com/account/&app"

How to handle 2 urls in sigle httprequst class.

I hv to pass user name and password and get the validation result for the user.
Please give me some guidelines as i am new to this kind of environment.

Thanks,
Srinivas Mateti
0
 
LVL 11

Assisted Solution

by:madgino
madgino earned 500 total points
ID: 33613057
Sorry for now I don't have the time to write the code for you but maybe this will work:
http://pastebin.com/QB4B1C3t

You actually have only one url, the other one is a parameter of the main url.
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