public static async Task <TReturn> ReadStreamAsync <TReturn>(this IWebReader webReader, Uri url, Retry retry, Func <Uri, Stream, CancellationToken, Task <TReturn> > reader, CancellationToken cancellationToken)
{
TReturn @return;
while (true)
{
using (IWebStreamResponse webStreamAsync = await webReader.GetWebStreamAsync(url, false, cancellationToken, (Uri)null, new long?(), new long?(), (WebResponse)null))
{
if (webStreamAsync.IsSuccessStatusCode)
{
Uri actualUrl = webStreamAsync.ActualUrl;
using (Stream stream = await webStreamAsync.GetStreamAsync(cancellationToken).ConfigureAwait(false))
{
@return = await reader(actualUrl, stream, cancellationToken).ConfigureAwait(false);
break;
}
}
else
{
if (!RetryPolicy.IsRetryable((HttpStatusCode)webStreamAsync.HttpStatusCode))
{
webStreamAsync.EnsureSuccessStatusCode();
}
bool canRetry = await retry.CanRetryAfterDelayAsync(cancellationToken).ConfigureAwait(false);
if (!canRetry)
{
webStreamAsync.EnsureSuccessStatusCode();
}
}
}
}
return(@return);
}