public async Task SendAsync_SendsMessageOnTooManyRequestsWaitsRetriesThenSuccess()
{
var retryDeltaMilliseconds = 1000;
var retryDelta = System.TimeSpan.FromMilliseconds(retryDeltaMilliseconds);
delay.DelayByTimeSpan(Arg.Any <System.TimeSpan>()).Returns(Task.CompletedTask);
var successfulMessage = new HttpRequestMessage();
var tooManyRequestsResponse = new HttpResponseMessage {
StatusCode = (HttpStatusCode)429
};
tooManyRequestsResponse.Headers.RetryAfter = new RetryConditionHeaderValue(retryDelta);
var successResponse = new HttpResponseMessage {
StatusCode = HttpStatusCode.OK
};
httpClient.SendAsync(Arg.Is(successfulMessage)).Returns(x => tooManyRequestsResponse, x => tooManyRequestsResponse, x => successResponse);
var response = await _client.SendAsync(successfulMessage);
await httpClient.Received(3).SendAsync(successfulMessage);
await delay.Received(2).DelayByTimeSpan(retryDelta);
Assert.Equal(successResponse, response);
}
public async Task <HttpResponseMessage> SendAsync(HttpRequestMessage message)
{
var response = await _httpClient.SendAsync(message);
while ((int)response.StatusCode == HTTP_CODE_TOO_MANY_REQUESTS)
{
var retryAfter = response.Headers.RetryAfter.Delta ?? TimeSpan.FromSeconds(1);
await _delay.DelayByTimeSpan(retryAfter);
response = await _httpClient.SendAsync(message);
}
if (response.IsSuccessStatusCode)
{
return(response);
}
var content = response.Content;
throw (content != null) ?
new ContentManagementException(response, await response.Content.ReadAsStringAsync()) :
new ContentManagementException(response, "CM API returned server error.");
}