CookieContainer data gets lost, why? [C#, web form] RSS

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  Tomo84

  Member

  30 Points

  25 Posts

  CookieContainer data gets lost, why? [C#, web form]

  Apr 30, 2012 03:34 PM|LINK

  Web form:

  <form id="form1" runat="server">
      <div>
          <asp:TextBox ID="txtBxEmail" runat="server"></asp:TextBox>
          <asp:TextBox ID="txtBxPassword" runat="server"></asp:TextBox>
          <asp:Button ID="btnLogin" runat="server" Text="Login" OnClick="btnLogin_Click" />
          <br /><br />
          <asp:TextBox ID="txtBxLink" runat="server" Text="http://example.com/elements/13579642/"></asp:TextBox>
          <asp:Button ID="btnDisplay" runat="server" Text="Display" OnClick="btnDisplay_Click" />
          <br /><br />
          <asp:TextBox ID="txtBxSource" runat="server" TextMode="MultiLine" Width="600" Height="600"></asp:TextBox>
      </div>
  </form>

  Code behind:

  protected void Page_Load(object sender, EventArgs e)
      {
  
      }
  
      CookieContainer loginCookie;
  
      public void btnLogin_Click(object sender, EventArgs e)
      {
          string postData = "type=0&user=" + txtBxEmail.Text + "&password=" + txtBxPassword.Text + "&remember=0";
          CookieContainer tempCookies = new CookieContainer();
          UTF8Encoding encoding = new UTF8Encoding();
          byte[] byteData = encoding.GetBytes(postData);
  
          HttpWebRequest postReq = (HttpWebRequest)WebRequest.Create("http://example.com/ajax/login.ajax.php");
          postReq.Method = "POST";
          postReq.KeepAlive = true;
          postReq.CookieContainer = tempCookies;
          postReq.ContentType = "application/x-www-form-urlencoded";
          postReq.Referer = "http://example.com/ajax/login.ajax.php";
          postReq.UserAgent = "Opera/9.80 (Windows NT 6.1; U; en) Presto/2.10.229 Version/11.61";
          postReq.ContentLength = byteData.Length;
  
          Stream postreqstream = postReq.GetRequestStream();
          postreqstream.Write(byteData, 0, byteData.Length);
          postreqstream.Close();
          HttpWebResponse postresponse = null;
  
          postresponse = (HttpWebResponse)postReq.GetResponse();
          tempCookies.Add(postresponse.Cookies);
          loginCookie = tempCookies;
          StreamReader postreqreader = new StreamReader(postresponse.GetResponseStream());
      }
  
      public void btnDisplay_Click(object sender, EventArgs e)
      {
          HttpWebRequest request = (HttpWebRequest)WebRequest.Create(txtBxLink.Text);
          request.CookieContainer = loginCookie;
          HttpWebResponse response = (HttpWebResponse)request.GetResponse();
          StreamReader reader = new StreamReader(response.GetResponseStream());
          string linkSourceCode = reader.ReadToEnd();
  
          txtBxSource.Text = linkSourceCode;
      }

  You have to be logged in to see http://example.com/elements/13579642/ sub page. When clicking the Display button it should populate txtBxSource with the elements source code, but it doesn't. Instead it shows the http://example.com/home/ source code. If I move the whole code in public void btnLogin_Click everything works, otherwise it doesn't.

  1. What would be the solution for my problem?

  2. Once I get it to work if I put the whole thing on a website/web host and someone logs (via this web page) in the http://example.com/  website and uses this mini application, the http://example.com/ website will receive his own IP or the webhost IP?

   

  • Edited by Tomo84 on Apr 30, 2012 03:35 PM
  • Edited by Tomo84 on Apr 30, 2012 03:36 PM