Using JWT Bearer Authentication When Call API

Question

I want to access an API for a purchased product, I used the following code according to the product documentation:

var client = new RestClient("http://example.com/api/login");

client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddParameter("username", "admin");
request.AddParameter("password", "admin");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

The documentation says:

Authentication is performed via JWT Bearer Authentication. Every endpoint requires authentication, so you will need to add the following header to each request

Authorization: Bearer <JWT>

How can I add the JWT authentication in my upper request?

Can you please link the documentation? You very likely will not be able to generate a JWT Bearer token using a username and password as that is more suited for Basic authentication. You will most likely need to call another auth endpoint first using your username and password, server will generate a bearer token, returns it and then you can use the token in subsequent requests to authorise your requests. — Ermiya Eskandary
– Ermiya Eskandary, Commented Oct 3, 2021 at 10:14
@ErmiyaEskandary Here's the documentation, Please don't to select the c# from language list documenter.getpostman.com/view/11765341/U16byA2y — Abdulsalam Elsharif
– Abdulsalam Elsharif, Commented Oct 3, 2021 at 10:18
Thanks Abdulsalam! That helps, I've posted an answer - let me know if it puts you on the right track? — Ermiya Eskandary
– Ermiya Eskandary, Commented Oct 3, 2021 at 10:28

Ermiya Eskandary · Accepted Answer · 2021-10-03 10:34:40Z

1

Based on the Access Granted Client Credentials section of the documentation you've provided, the endpoint you need to be calling for a Bearer token is /admin/api/index.php/api/login.

Calling that endpoint with correct credentials will populate your response.Content with the below JSON:

{
  "status": 200,
  "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJodHRwOlwvXC9kZW1vNC5zYXNyYWRpdXMuY29tXC9hZG1pblwvYXBpXC9pbmRleC5waHBcL2FwaVwvbG9naW4iLCJpYXQiOjE2MzA0MDU5OTgsImV4cCI6MTYzMDQwOTU5OCwibmJmIjoxNjMwNDA1OTk4LCJqdGkiOiJCZmdvN00zN2pkbGtRRzFhIiwic3ViIjoxLCJwcnYiOiJkNzk3N2M0N2U5MTY5NjUxMDEwNzM0ZDJmYmY4Y2MxMzlmM2U1MDM0In0.7tNWgF6psOPKpPC9-zU_hEK_GLx3-BeFlIW9LE4wzYo"
}

Deserialise the above JSON object to a token object & the token field will be your JWT token.

Token.cs

public class Token
{
    public int status { get; set; }
    public string token { get; set; }
}

var tokenObj = JsonConvert.DeserializeObject<Token>(response.Content);
string token = tokenObj.token;

For subsequent requests, to authenticate, add this line & you should be good to go.

request.AddHeader("Authorization", $"Bearer {token}");

edited Oct 3, 2021 at 10:34

answered Oct 3, 2021 at 10:27

Ermiya Eskandary

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2 Comments

Abdulsalam Elsharif Over a year ago

I got "Internal Server Error"

Ermiya Eskandary Over a year ago

@AbdulsalamElsharif I can't help with more information but is your URL correct? Are your username and passwords correct? Your original question on how to set a bearer token on a RestSharp request has been answered.

m4n0 · Accepted Answer · 2021-10-03 10:28:21Z

0

request.AddHeader("Authorization", $"Bearer {Token}");

edited Oct 3, 2021 at 10:28

m4n0

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answered Oct 3, 2021 at 10:15

Jon Snow

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2 Comments

Abdulsalam Elsharif Over a year ago

How can I get the Token?

nima Over a year ago

While this code may answer the question, providing additional context regarding how and/or why it solves the problem would improve the answer's long-term value. You can find more information on how to write good answers in the help center: stackoverflow.com/help/how-to-answer . Good luck 🙂

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