Paypal OAuth login example doesn't work as expected

Question

I\'m following this interactive login example from Paypal\'s site.

  public ActionResult PaypalResponse(string scope, string code)
    {
        Dictionary&l         


        

Answer 1

updated based on @pollirrata answer, and this is how it worked for me. Hope it will help someone.

    //code is what you get from LoginWithPayPal login page in return (query string)
public ....  GetRefreshAccessToken(string code)
    {            
        var oAuthClientId = "clientid from paypal developer site";
        var oAuthClientSecret = "client secret from paypal developer site";
        var oAuthUrl = "https://api.sandbox.paypal.com/v1/identity/openidconnect/tokenservice";

        var authHeader = string.Format("Basic {0}",
                                       Convert.ToBase64String(
                                           Encoding.UTF8.GetBytes(Uri.EscapeDataString(oAuthClientId) + ":" +
                                                                  Uri.EscapeDataString((oAuthClientSecret)))
                                           ));

        //passing code here
        var postBody = string.Format("grant_type=authorization_code&code={0}", code);

        var authRequest = (HttpWebRequest)WebRequest.Create(oAuthUrl);
        authRequest.Headers.Add("Authorization", authHeader);
        authRequest.Method = "POST";
        byte[] postcontentsArray = Encoding.UTF8.GetBytes(postBody);
        authRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
        authRequest.ContentLength = postcontentsArray.Length;

        try
        {
            using (Stream stream = authRequest.GetRequestStream())
            {
                stream.Write(postcontentsArray, 0, postcontentsArray.Length);
                stream.Close();

                WebResponse response = authRequest.GetResponse();
                using (Stream responseStream = response.GetResponseStream())
                    if (responseStream != null)
                    {
                        using (var reader = new StreamReader(responseStream))
                        {
                            string responseFromServer = reader.ReadToEnd();
                            reader.Close();
                            responseStream.Close();
                            response.Close();
                            //this will return you access token which you can use to get user information
                            var responseResult =
                                JsonConvert.DeserializeObject(responseFromServer);                                
                        }
                    }
            }
        }
        catch (Exception e)
        {
            //log error
        }
    }

After this you can call GET method with new token for user information, uri: https://api.sandbox.paypal.com/v1/identity/openidconnect/userinfo/?schema=openid

Refer to: https://developer.paypal.com/webapps/developer/docs/integration/direct/identity/log-in-with-paypal/