Wednesday, October 10, 2007

Blog's view changed!!! :(

Hi there,
Unfortunately I have to change the face of the blog. The reason for this action that the current view does not fit well when a code snippet is post - like in my last post. I do not like tthe current design very much but this is the only one template that fits my needs. I'll try soon to edit the template and make it with a little bit better design.

Tuesday, October 9, 2007

Using exsiting IE cookies with HttpRequest

I've come accross an idea of making my own web spider with .Net. My tests were to grab information from the Experts-exchange site. I've used a code like this

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();

The request passes correct and getting the response was working well also. However the content of the response was not the correct one - I mean that it was different than the one I can see if I open an explorer.

What was the difference? The difference was the cookies! When I open the Internet Explorer and navigate to EE the EE server accepts me as logged in user using my cookies. However using the programatically created web request no cookies are associated with the request and the server does not show me the information I want.

During some research and some test I've come across the InternetGetCookie function. This function allows you to get the cookies stored by the Internet Explorer and assign them to your web request.

Here is the code I've come to:

public class RequesstWithCookie

[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]

static extern bool InternetGetCookie(string lpszUrlName, string lpszCookieName,
[Out] StringBuilder lpszCookieData, [MarshalAs(UnmanagedType.U4)] out int lpdwSize);

CookieContainer cookies;

public RequesstWithCookie(String siteUrl)




public HttpWebRequest CreateRequest(string pageUrl)


Uri uri = new Uri(pageUrl);

HttpWebRequest request = null;
request = (HttpWebRequest)WebRequest.Create(uri);
request.CookieContainer = cookies;

return request;


private void LoadCookies(String url)

cookies = new CookieContainer();
Uri uri = new Uri(url);

StringBuilder cookieBuilder = new StringBuilder(new string(' ', 256), 256);

int cookieSize = cookieBuilder.Length;

if (!InternetGetCookie(url, null, cookieBuilder, out datasize))


if (datasize <> 0)




cookieBuilder = new StringBuilder(datasize);

InternetGetCookie(url, null, cookieBuilder, out datasize);


cookies.SetCookies(uri, cookieBuilder.ToString().Replace(";", ","));



Hope this code will help somebody else to not lose an hour or more to find this out.

Wednesday, October 3, 2007

Second edition of DevReach finished

This was just a wonderful event. I've been for second time on the DevReach in Sofia, Bulgaria and it was just amazing. For second time I have the ability to participate in sessions of Richard Campbell, Stephen Forte and Carl Franklin. I also participate in a session of Miguel Castro that is another amazing speaker.

Hope that this event will developed itself in future and will bring to Bulgaria more and more speakers of this rank.

There was a little problem with the rooms - some of the rooms was to small to hold everyone that wish to listen Stephen Forte or Miguel Castro. Hope that next year this part of the event will be better.