How to use HttpClient to Post with Authentication

Question

I am trying to do the following curl (which works for me) in C# using HttpClient.

curl -X POST http://www.somehosturl.com \\
     -u :

        

Answer 1

First you have to set the Authorization-Header with your and .

Instead of using StringContent you should use FormUrlEncodedContent as shown below:

var client = new HttpClient();
client.BaseAddress = new Uri("http://myserver");
var request = new HttpRequestMessage(HttpMethod.Post, "/path");

var byteArray = new UTF8Encoding().GetBytes(":");
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));

var formData = new List>();
formData.Add(new KeyValuePair("grant_type", "password"));
formData.Add(new KeyValuePair("username", ""));
formData.Add(new KeyValuePair("password", ""));
formData.Add(new KeyValuePair("scope", "all"));

request.Content = new FormUrlEncodedContent(formData);
var response = await client.SendAsync(request);