/// <summary>
/// Performs a token refresh.
/// </summary>
/// <returns>The JSOn answer received by the server.</returns>
/// <param name="url">The url of the openid serevr</param>
/// <param name="clientId">Client identifier.</param>
/// <param name="refreshToken">Refresh token.</param>
public async Task <JsonValue> RefreshAsync(String url, String clientId, String refreshToken)
{
JsonValue json = null;
try
{
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var parameters = new Dictionary <string, string> {
{ "scope", "openid" }, { "refresh_token", refreshToken }, { "grant_type", "refresh_token" }
};
var clientAuthParams = new Dictionary <string, string> {
{ "client_id", clientId }
};
if (clientAuthParams != null)
{
foreach (KeyValuePair <string, string> clientParam in clientAuthParams)
{
parameters.Add(clientParam.Key, clientParam.Value);
}
}
var requestBody = new FormUrlEncodedContent(parameters);
var responseMessage = await client.PostAsync(url, requestBody).ConfigureAwait(false);
var responseString = await responseMessage.Content.ReadAsStringAsync().ConfigureAwait(false);
json = JsonValue.Parse(responseString);
}
catch (IOException e)
{
throw AuthzException.fromTemplate(AuthzException.GeneralErrors.NETWORK_ERROR, e);
}
catch (ArgumentException e)
{
throw AuthzException.fromTemplate(AuthzException.GeneralErrors.JSON_DESERIALIZATION_ERROR, e);
}
catch (Exception e)
{
throw AuthzException.fromTemplate(AuthzException.GeneralErrors.NETWORK_ERROR, e);
}
if (json.ContainsKey(AuthzException.PARAM_ERROR))
{
AuthzException ex;
try
{
string error = json[AuthzException.PARAM_ERROR];
ex = AuthzException.fromOAuthTemplate(
AuthzException.TokenRequestErrors.byString(error), error,
json.ContainsKey(AuthzException.PARAM_ERROR_DESCRIPTION) ? json[AuthzException.PARAM_ERROR_DESCRIPTION] : null,
parseUriIfAvailable(json.ContainsKey(AuthzException.PARAM_ERROR_URI) ? json[AuthzException.PARAM_ERROR_URI] : null));
}
catch (Exception e)
{
ex = AuthzException.fromTemplate(AuthzException.GeneralErrors.JSON_DESERIALIZATION_ERROR, e);
}
throw ex;
}
return(json);
}
