public static bool VerifyCredentialsAndDetectAuthScheme(IBlogCredentials blogCredentials, SharePointClient client)
{
//Attempt to execute the GetUsersBlogs() operation using standard HTTP authentication
//If the server challenges with an HTTP 401, but doesn't include with WWW-authentication
//header, then the server is configured to use MetaWeblog for authentication, so we
//re-issue the request using that authentication scheme instead.
AuthenticationScheme authScheme = AuthenticationScheme.Http;
AuthenticationScheme requiredAuthScheme = AuthenticationScheme.Unknown;
while (requiredAuthScheme == AuthenticationScheme.Unknown || authScheme != requiredAuthScheme)
{
if (requiredAuthScheme != AuthenticationScheme.Unknown)
{
authScheme = requiredAuthScheme;
}
blogCredentials.SetCustomValue(AUTH_SCHEME, authScheme.ToString());
try
{
TransientCredentials tc = new TransientCredentials(blogCredentials.Username, blogCredentials.Password, null);
client.Credentials.TransientCredentials = tc;
client.InitTransientCredential(tc);
client.GetUsersBlogs();
return(true);
}
catch (WebException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e);
}
catch (BlogClientHttpErrorException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e.Exception);
}
catch (BlogClientAuthenticationException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e.WebException);
}
catch (Exception)
{
throw;
}
Debug.Assert(requiredAuthScheme != AuthenticationScheme.Unknown, "Unexpected authscheme"); //this would cause an infinite loop!
}
return(false);
}
public static bool VerifyCredentialsAndDetectAuthScheme(IBlogCredentials blogCredentials, SharePointClient client)
{
//Attempt to execute the GetUsersBlogs() operation using standard HTTP authentication
//If the server challenges with an HTTP 401, but doesn't include with WWW-authentication
//header, then the server is configured to use MetaWeblog for authentication, so we
//re-issue the request using that authentication scheme instead.
AuthenticationScheme authScheme = AuthenticationScheme.Http;
AuthenticationScheme requiredAuthScheme = AuthenticationScheme.Unknown;
while (requiredAuthScheme == AuthenticationScheme.Unknown || authScheme != requiredAuthScheme)
{
if (requiredAuthScheme != AuthenticationScheme.Unknown)
authScheme = requiredAuthScheme;
blogCredentials.SetCustomValue(AUTH_SCHEME, authScheme.ToString());
try
{
TransientCredentials tc = new TransientCredentials(blogCredentials.Username, blogCredentials.Password, null);
client.Credentials.TransientCredentials = tc;
client.InitTransientCredential(tc);
client.GetUsersBlogs();
return true;
}
catch (WebException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e);
}
catch (BlogClientHttpErrorException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e.Exception);
}
catch (BlogClientAuthenticationException e)
{
requiredAuthScheme = GetRequiredAuthScheme(e.WebException);
}
catch (Exception)
{
throw;
}
Debug.Assert(requiredAuthScheme != AuthenticationScheme.Unknown, "Unexpected authscheme"); //this would cause an infinite loop!
}
return false;
}
