How to use Basic Auth with HttpClient?

Question

How to use Basic Auth with HttpClient?

winanjaya 146

Hi All,

I use snippet codes below, but keeps getting 401, what I have missed?

                var authenticationString = $"{userName}:{userPassword}";
                var base64String = Convert.ToBase64String(
                   System.Text.Encoding.ASCII.GetBytes(authenticationString));

                _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", base64String);

                await _httpClient.GetAsync(url);

Jack J Jun 25,296 Reputation points

2023-03-08T05:44:46.1133333+00:00

@winanjaya, Welcome to Microsoft Q&A, based on my test, I could get the normal response 200 code with the same code with you. Could you show the detailed information about the 401 error like the following:

BTW, I also find the question is solved by using https: instead of http:. And you could have a try for it

2 answers

Your answer

Jack J Jun 25,296 Reputation points

2023-03-08T05:44:46.1133333+00:00

@winanjaya, Welcome to Microsoft Q&A, based on my test, I could get the normal response 200 code with the same code with you. Could you show the detailed information about the 401 error like the following:

BTW, I also find the question is solved by using https: instead of http:. And you could have a try for it

Answer 1

Alexander Bösel 0

Hi, does System.Text.Encoding.UTF8.GetBytes(authenticationString) work for you?

Cheers,

Alex

Answer 2

Bruce (SqlWork.com) 75,541 Moderator

its one of the following issues

username & password combo not valid
credentials are valid, but user not authorized to access resource
basic authentication not supported by server (check the WWW-Authenticate header)

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How to use Basic Auth with HttpClient?

2 answers

Your answer