public static async Task RetryOnExceptionAsync(int times, Func <Task> operation, IdServerResourceOwnerClientSettings idServerResourceOwnerClientSettings)
{
if (times <= 0)
{
throw new ArgumentOutOfRangeException(nameof(times));
}
var attempts = 0;
bool hasClearedAccessToken = false;
do
{
try
{
attempts++;
await operation().ConfigureAwait(false);
break;
}
catch (HttpClientException ex)
{
//If Unauthorized exception decrement attempts and clear the access token - only do once
if (!hasClearedAccessToken && ex.HttpStatusCode == System.Net.HttpStatusCode.Unauthorized && idServerResourceOwnerClientSettings != null)
{
hasClearedAccessToken = true;
attempts--;
AccessTokenCache.ClearIdServerAccessToken(idServerResourceOwnerClientSettings);
}
if (attempts == times)
{
throw ex;
}
await CreateDelay(attempts).ConfigureAwait(false);
}
catch (HttpServerException ex)
{
if (attempts == times)
{
throw ex;
}
await CreateDelay(attempts).ConfigureAwait(false);
}
catch (Exception ex)
{
if (attempts == times)
{
throw ex;
}
await CreateDelay(attempts).ConfigureAwait(false);
}
} while (true);
}
private async Task <IHttpRestResponse> ExecuteInternalAsync(IHttpRestRequest request)
{
string apiUrl = _url + "/" + request.QueryUrl;
HttpRequestMessage requestMessage = new HttpRequestMessage(request.Method, new Uri(apiUrl));
if (_hasIDServerResourceOwnerClientSettings)
{
string bearerToken = await AccessTokenCache.GetIdServerAccessToken(_idServerResourceOwnerClientSettings, InternalHttpClientHandler).ConfigureAwait(false);
request.SetHeader("Authorization", string.Format("Bearer {0}", bearerToken));
}
requestMessage.Headers.Add("Accept", "application/json");
foreach (KeyValuePair <string, string> item in request.Headers)
{
requestMessage.Headers.Add(item.Key, item.Value.ToString());
}
if (request.JsonBody.Length > 0)
{
var jsonBody = new StringContent(request.JsonBody, Encoding.UTF8, "application/json");
requestMessage.Content = jsonBody;
}
HttpResponseMessage response = await HttpClient.SendAsync(requestMessage).ConfigureAwait(false);
CheckResponseError(response);
Stream stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
var sr = new StreamReader(stream);
string content = sr.ReadToEnd();
IHttpRestResponse resp = new HttpRestResponse()
{
Request = request,
Content = content,
StatusCode = response.StatusCode,
Headers = response.Headers
};
return(resp);
}
