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c#.nethttpntlm

Check url with NTLM on server side

I need to check if url exists and can be reached. In order to do it I send Get request and handle the status:

var httpClient = new HttpClient();
var response = httpClient.GetAsync(new Uri(pageUrl));
isPageAccessible = response.Result.StatusCode == HttpStatusCode.OK;

However, the server uses NTLM for authentication. As I found it here, there are several steps (requests) before I get success OK status. For the first request I get 401 Unauthorized status and can't go to further steps.

All in all, how can I check url on the server with NTML upon completion of all requests?

Solution

  • If you are accessing an authenticated server, you should provide credentials. Credentials of running process for NTLM can be provided with HttpClient as below:

    var handler = new HttpClientHandler { 
                      Credentials = System.Net.CredentialCache.DefaultCredentials
                  };
var httpClient = new HttpClient(handler);
var response = httpClient.GetAsync(new Uri(pageUrl));