oAuth2 token using in RestSharp

 

public void api()

{

    string token = "";

 

    try {

        callApi(token);

    }

    catch(Exception)

    {

        var client = new RestClient("www.example.com/api/token");

        var request = new RestRequest(Method.POST);

        request.AddHeader("content-type", "application/x-www-form-urlencoded");

        request.AddHeader("cache-control", "no-cache");

        request.AddParameter("application/x-www-form-urlencoded", "grant_type=password&username=us&password=pas", ParameterType.RequestBody);

        IRestResponse response = client.Execute(request);

 

        dynamic resp = JObject.Parse(response.Content);

        token = resp.access_token;

 

        callApi(token);

    }

}     

 

public void callApi(string token)

{

    var client = new RestClient("www.example.com/api/data");

    var request = new RestRequest(Method.GET);

    request.AddHeader("cache-control", "no-cache");

    request.AddHeader("authorization", "Bearer " + token);

    request.AddHeader("accept", "application/json; charset=utf-8");

    IRestResponse response = client.Execute(request);

}

=============

How to get a token :

var url = "https://my.api.endpoint/GetToken";

var apiKey = "api_key";

var apiPassword = "api_password";

 

//create RestSharp client and POST request object

var client = new RestClient(url);

var request = new RestRequest(Method.POST);

 

//add GetToken() API method parameters

request.Parameters.Clear();

request.AddParameter("grant_type", "password");

request.AddParameter("username", apiKey);

request.AddParameter("password", apiPassword);

 

//make the API request and get the response

IRestResponse response = client.Execute(request);

 

//return an AccessToken

return JsonConvert.DeserializeObject(response.Content);

ref : https://mfcallahan.blog/2017/07/30/making-a-post-request-to-an-oauth2-secured-api-using-restsharp/