C# .. API httpclient authentication and proxy with username and password

Question

I'm new in API's world but I had a question, I want to get data from Web API but there's two authentication

First with proxy.
Second with API base authentication.

here's my Get Action code:

        HttpClientHandler handler = new HttpClientHandler();
        handler.Credentials = new NetworkCredential("test", "testing");
        HttpClient client = new HttpClient(handler);
        client.BaseAddress = new Uri("http://test.abctesting.com/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.
            MediaTypeWithQualityHeaderValue("application/json"));

        HttpResponseMessage response = client.GetAsync("admin/apiv2/").Result;
        var tenders = response.Content.ReadAsAsync<tenders>().Result;

this code work fine with me but just in pass over proxy username and password! How can I continue to Get API Data with authentication username and password?

Do you know which authentication mode your API is using?

Rodrigo Vedovato
– Rodrigo Vedovato

2017-09-18 20:05:55 +00:00
Commented Sep 18, 2017 at 20:05 — Rodrigo Vedovato
– Rodrigo Vedovato, Commented Sep 18, 2017 at 20:05
Basic authentication I think

MuhammadElshater
– MuhammadElshater

2017-09-18 20:24:39 +00:00
Commented Sep 18, 2017 at 20:24 — MuhammadElshater
– MuhammadElshater, Commented Sep 18, 2017 at 20:24

Jaya · Accepted Answer · 2017-09-18 20:30:45Z

6

Since you mentioned "Basic Auth" on comments adding the following lines in addition to what you have might help

 var byteArray = Encoding.ASCII.GetBytes($"{yourUsername}:{yourPassword}");
 client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));

Although there are other popular modes of auth such as OAuth, Bearer etc. Change the key on AuthenticationHeaderValue according to the mode of authentication and set the value appropriately

answered Sep 18, 2017 at 20:30

Jaya

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Comments

Rodrigo Vedovato · Accepted Answer · 2017-09-18 20:27:42Z

1

This should work:

HttpClientHandler handler = new HttpClientHandler();
handler.Credentials = new NetworkCredential("test", "testing");
HttpClient client = new HttpClient(handler);
client.BaseAddress = new Uri("http://test.abctesting.com/");
client.DefaultRequestHeaders.Accept.Clear();

client.DefaultRequestHeaders.Accept.Add(
    new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

string user = "user", password = "password";

string userAndPasswordToken =
    Convert.ToBase64String(Encoding.UTF8.GetBytes(user + ":" + password));

client.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", 
    $"Basic {userAndPasswordToken}");

HttpResponseMessage response = client.GetAsync("admin/apiv2/").Result;
var tenders = response.Content.ReadAsAsync<tenders>().Result;

answered Sep 18, 2017 at 20:27

Rodrigo Vedovato

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1 Comment

MuhammadElshater Over a year ago

it got 3 errors .. .. unexpected charachter $ .. invalid expression term '' .. ) expected

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