private void Authenticate(string username, string password)
{
//if we have a username/password and we aren't already authenticated then authenticate
if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password))
{
using(HttpUtility.CookieAwareWebClient _client = new HttpUtility.CookieAwareWebClient(_cookies))
{
//check if the user is already logged in (doh!)
try
{
var loginReg = @"<span class=""name"".*?" + username + "</span>";
string homepage = _client.DownloadString("http://wallbase.cc");
if (Regex.Match(homepage, loginReg, RegexOptions.IgnoreCase).Success)
{
return;
}
}
catch(Exception ex)
{
Log.Logger.Write(string.Format("There was an error trying to check for a pre-existing wallbase auth, ignoring it. Exception details: {0}", ex.ToString()), Log.LoggerLevels.Errors);
}
try
{
//need to extract the cross-site request forgery token from the page
//<img.*src=""(?<img>.*(wallpaper.*\.(jpg|png)))""
var csrfRegex = new Regex(@"<input type=""hidden"" name=""csrf"" value=""(?<csrf>.*)"">");
var refWallbase64Regex = new Regex(@"<input type=""hidden"" name=""ref"" value=""(?<ref>.*)"">");
string loginPage = _client.DownloadString("http://wallbase.cc/user/login");
Match lpM = csrfRegex.Match(loginPage);
Match lpWallbaseInbase64 = refWallbase64Regex.Match(loginPage);
if (!lpM.Success) return;
var loginData = new NameValueCollection();
loginData.Add("csrf", lpM.Groups["csrf"].Value);
loginData.Add("ref", lpWallbaseInbase64.Groups["ref"].Value);
loginData.Add("username", username);
loginData.Add("password", password);
_client.Referrer = "http://wallbase.cc/user/login";
_client.Headers.Add(HttpRequestHeader.ContentType, "application/x-www-form-urlencoded");
byte[] result = _client.UploadValues(@"http://wallbase.cc/user/do_login", "POST", loginData);
//we do not need the response, all we need are the cookies
string response = System.Text.Encoding.UTF8.GetString(result);
}
catch (Exception ex)
{
throw new WallbaseAccessDeniedException("Wallbase authentication failed. Please verify your username and password.", ex);
}
}
}
}
