unauthorized error when using HttpClient

Question

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;

namespace ConsoleProgram
{
    public class Class1
    {
        private const string URL = "https://sun.domain.com/v1/service/token";
        static void Main(string[] args)
        {
            var handler = new HttpClientHandler();
            handler.Credentials = new System.Net.NetworkCredential("admin@client", "admin");
            HttpClient client = new HttpClient(handler);
            //client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes(String.Format("{0}:{1}", "admin", "admin"))));
            //  client.BaseAddress = new Uri(URL);
            // Add an Accept header for JSON format.
            client.DefaultRequestHeaders.Accept.Add(
            new MediaTypeWithQualityHeaderValue("application/json"));
            // List data response.
            HttpResponseMessage response = client.GetAsync(URL).Result;  // Blocking call!
            String res = response.ToString();
            Console.WriteLine(res);
        }
    }
}

I am getting unauthorized error even though I am passing the correct credentials. Any ideas?

I tried almost all the answers posted on StackOverflow.

Please put some effort into formatting your code - it's very hard to read with no indentation... — Jon Skeet
– Jon Skeet, Commented Aug 26, 2014 at 21:33
You've also given no background information, so it's very difficult to tell what you're trying to do, edit the question and give some more information about what your actually trying to accomplish in general. — OneHoopyFrood
– OneHoopyFrood, Commented Aug 26, 2014 at 21:43
Depends on what type of authentication "https://sun.domain.com/v1/service/token" supports. — AaronLS
– AaronLS, Commented Aug 26, 2014 at 21:49
I am trying to consume a c# rest service using httpclient. I will look into the type of authentication the server is using now. Thanks. — ignorantguy
– ignorantguy, Commented Aug 26, 2014 at 21:52

Todd Menier · Accepted Answer · 2014-08-27 15:53:08Z

10

For Basic Authentication, you need to send the credentials in an authorization header called "Basic" with base64-encoded "username:password" as the value. This should get the job done:

var headerVal = Convert.ToBase64String(Encoding.UTF8.GetBytes("admin@client:admin"));
var header = new AuthenticationHeaderValue("Basic", headerVal);
client.DefaultRequestHeaders.Authorization = header;

edited Aug 27, 2014 at 15:53

answered Aug 27, 2014 at 15:27

Todd Menier

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3 Comments

ignorantguy Over a year ago

Todd, I tried your method but it is the same unauthorized response again. Thank you.

Todd Menier Over a year ago

Yeah I didn't even notice the commented-out line. Hmm. You tried without the HttpClientHandler, i.e. just new HttpClient(); ? Don't include that AND the auth header. And did you try authenticating at that URL from a browser? I really suspect your code is not the problem.

ignorantguy Over a year ago

Todd, there was a problem with the url itself. Thanks. I figured it out.

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