WebRequest/WebResponse form submit problem. HELP!

MAtkins · #1 (**permalink**) October 21st, 2005, 04:02 PM

Hi:

I'm trying to make a post request to a site.
If I use a normal browser I get a different response than if I use HttpWebRequest.

This is one example. I'm seemingly not successfully posting to any of these sites. I created a site of my own that would read the request vars and return a response. That one works fine but this other one doesn't.

The site:
http://www.365articles.com/modules.p...e=Your_Account

If I log in as: login: Mister Pwd: Tester
Using the IE browser it returns a URL of:
http://www.365articles.com/modules.p...Account&stop=1
and I see text:
"Login Incorrect! Please Try Again..."

If I try the same thing using HttpWebRequest & HttpWebResponse it just returns to the URL I submitted with nothing changed.

What the heck am I doing wrong?
Why does the browser return with a different URL and different text but this does not?

Here's my code:

Code:

private void Page_Load(object sender, System.EventArgs e)
{
    getCookie();
}

private void getCookie()
{
  string sURL = "http://www.365articles.com/modules.php?name=Your_Account";
  HttpWebRequest webrequest = (HttpWebRequest) WebRequest.Create(sURL);
  webrequest.ContentType = "application/x-www-form-urlencoded";
            webrequest.KeepAlive = false;
            webrequest.Method = "get";

  HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();

  WebHeaderCollection headers = webresponse.Headers;
  if (headers["Set-Cookie"] != null)
  {
    Cookie = headers["Set-Cookie"];  
  }
  doSubmit();
}

private void doSubmit()
{
  string uri = "";

  string sURL = "http://www.365articles.com/modules.php?name=Your_Account";
  string sRequest = "username=Mister&user_password=Tester&redirect=&mode=&f=&t=&op=login&submit=Login";

  HttpWebRequest webrequest = (HttpWebRequest) WebRequest.Create(sURL);
  webrequest.ContentType = "application/x-www-form-urlencoded";
  webrequest.KeepAlive = false;
  webrequest.Method = "post";

  webrequest.Headers.Add("Cookie", Cookie);

  ASCIIEncoding encoding = new ASCIIEncoding();
  byte[]  bytes = encoding.GetBytes(sRequest);            
  webrequest.ContentLength = bytes.Length; 
  Stream oStreamOut = webrequest.GetRequestStream();
  oStreamOut.Write(bytes,0,bytes.Length);
  oStreamOut.Close();

  HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();

  WebHeaderCollection headers = webresponse.Headers;

  if ((webresponse.StatusCode == HttpStatusCode.Found) || 
                (webresponse.StatusCode == HttpStatusCode.Redirect) ||
                (webresponse.StatusCode == HttpStatusCode.Moved) ||
                (webresponse.StatusCode == HttpStatusCode.MovedPermanently))
  {
    // Get redirected uri
    uri = headers["Location"] ;
    uri = uri.Trim();
  }
  Response.Write(uri + "<BR>");
  //Check for any cookies
  if (headers["Set-Cookie"] != null)
  {
    Cookie = headers["Set-Cookie"];  
  }
  Response.Write(Cookie + "<BR>");

  Encoding enc = System.Text.Encoding.GetEncoding(1252);
            StreamReader loResponseStream = new 
                StreamReader(webresponse.GetResponseStream(),enc);
 
  sHTML = loResponseStream.ReadToEnd(); 
  loResponseStream.Close();
  webresponse.Close();

  if(sHTML != "")
  {
    didSubmit = true;
  }
}

Mystic · #2 (**permalink**) June 14th, 2006, 03:18 AM

well fellow ur problem is solved. iam sending u the code. implement it.
string url="http://www.365articles.com/modules.php?name=Your_Account";
            string data="username=gogo&user_password=newnewne&op=logi n";
            byte[] buffer=Encoding.UTF8.GetBytes(data);
            string result="";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            req.ContentType ="application/x-www-form-urlencoded";
            req.ContentLength = buffer.Length;
            //req.Proxy = new WebProxy(proxy, true); // ignore for local addresses
            req.CookieContainer = new CookieContainer(); // enable cookies

            Stream reqst = req.GetRequestStream(); // add form data to request stream

            reqst.Write(buffer, 0, buffer.Length);
            reqst.Flush();
            reqst.Close();

            Console.WriteLine("\nPosting data to " + url);
            HttpWebResponse res = (HttpWebResponse)req.GetResponse(); // send request,get response
            Console.WriteLine("\nResponse stream is: \n");
            Stream resst = res.GetResponseStream(); // display HTTP response
            StreamReader sr = new StreamReader(resst);
            result=sr.ReadToEnd();
            using(System.IO.StreamWriter writer=new StreamWriter("C:\\Temp\\checkcheck.html"))
            {
                writer.Write(result);
            }

vivek0908 · #3 (**permalink**) December 22nd, 2010, 11:28 PM

Hi,

I have been scrapping sites.But today I encounterred a new problem.

req.ContentType = "application/x-www-form-urlencoded";

Actually the content type which is accepted by server is not
"application/x-www-form-urlencoded".

I don't know what else can be used.

Please help

Need to download code?

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