how to implement login from code to other site (hidden login)

Question

hi there ,
i want to login to another site using httpWebreqwest & httpWebResponse classes & i used the falwing code :

public string Crawl_UsingPost(string postData)
{
req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.Credentials =new NetworkCredential(username,password);
req.ContentType = "text/html";


req.Headers.Add("username",username);
req.Headers.Add("password",password);
req.PreAuthenticate=true;
req.Pipelined=true;
req.ContentLength= postData.Length;
CookieContainer cookies = new CookieContainer();
req.CookieContainer=cookies;

req.KeepAlive=true;
StreamWriter stOut = new StreamWriter(req.GetRequestStream(),System.Text.Encoding.ASCII);
stOut.Write(postData);
stOut.Close();

webResponse=(HttpWebResponse)req.GetResponse();
string responseString="";
if (req.HaveResponse)
{
StreamReader stream = new StreamReader
(webResponse.GetResponseStream());
responseString = stream.ReadToEnd();
stream.Close();
webResponse.Close();
}
return responseString;
}

i will appreciate your reply thanks

Answer 1

You are using the correct approach.  To authenticate to a remote host all you need to do is add your credentials to the request:
   

req.Credentials =new NetworkCredential(username,password);

You can also add a CredentialCache to your request to specify different credentials for different remote hosts and authentication schemes:
   

CredentialCache cache = new CredentialCache()    cache.Add(new Uri("http://www.microsoft.com", "Digest", new NetworkCredential(username,password));    req.Credentials = cache;

Finally, if you want to just use the credentials of the current Windows user, you can just configure the request to use the default credentials:
   

req.UseDefaultCredentials = true;

I advise against putting the username and password in the headers.  This is insecure, and I don't think it is necessary.

Daniel Roth
System.Net

Answer 2

Thanks Daniel Roth,
I do your changes but i still have the problem i can't login yet.

I need more help, what I was missed in my code.

Thanks.

Answer 3

Whats the error/exception that you are seeing?