使用 RestSharp 获取 PayPal 访问令牌返回“状态代码：未找到”

Question

Getting PayPal Access Token not working

I'm getting the response:

"StatusCode: NotFound, Content-Type: application/json, Content-Length: 131)"

My code, using RestSharp

public void getToken()
{
    var clientId = "{client-ID}";
    var secret = "{client-secret}";

    if (ServicePointManager.SecurityProtocol != SecurityProtocolType.Tls12) ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; // forced to modern day SSL protocols
    var client = new RestClient("https://api.paypal.com/v1/oauth2/token") { Encoding = Encoding.UTF8 };
    var authRequest = new RestRequest("oauth2/token", Method.POST) { RequestFormat = DataFormat.Json };
    client.Authenticator = new HttpBasicAuthenticator(clientId, secret);
    authRequest.AddParameter("grant_type", "refresh_token&refresh_token={refresh_token}");
    var authResponse = client.Execute(authRequest);
}

I do have a slight feeling my grant_type may be incorrect, as I'm not 100% sure what actually goes here, after a bit of research it still isn't clear to me - but I went with refresh_token&refresh_token={refresh_token} . Although {refresh_token} is static, I'm not sure if you're supposed to populate this with a value, or how to do so.

Does anybody know what I'm doing wrong - and if my suspicions regarding the issue being the grant_type being correct?

Answer 1

You've doubled up the path.

new RestClient("https://api.paypal.com/v1/oauth2/token") 

This line sets that URL as the base address , which is prepended to your other path strings. So, when you use new RestRequest("oauth2/token", ...) , the URL you end up fetching is

https://api.paypal.com/v1/oauth2/token/oauth2/token

Just remove the path string from the base address, so you have:

 new RestClient("https://api.paypal.com/v1") 

Answer 2

I agree with the above but have tidied the answer up a little

public string GetAccessToken()
{
  var clientId = "my_client_id";
  var secret = "my_password";

  var client = new RestClient("https://api-m.sandbox.paypal.com/") { Encoding = Encoding.UTF8 };
  var authRequest = new RestRequest("v1/oauth2/token", Method.POST) { RequestFormat = DataFormat.Json };
  client.Authenticator = new HttpBasicAuthenticator(clientId, secret);

  authRequest.AddParameter("grant_type", "client_credentials");
  var response = client.Execute(authRequest);

  AccessToken token = JsonConvert.DeserializeObject<AccessToken>(response.Content);
  return token.access_token;
}




public class AccessToken
 {

    public string scope { get; set; }
    public string access_token { get; set; }
    public string token_type { get; set; }
    public string app_id { get; set; }
    public int expires_in { get; set; }
    public string nonce { get; set; }

  }