public async Task <TCached> ReadAsync <TCached>(Func <Uri, byte[], TCached> factory, CancellationToken cancellationToken, WebResponse webResponse = null) where TCached : class
{
if (null == (object)(this._cachedObject as TCached))
{
this._cachedObject = (object)null;
}
IRetry retry = RetryManagerExtensions.CreateWebRetry(this._retryManager, 2, 250);
await RetryExtensions.CallAsync(retry, (Func <Task>)(() => this.Fetch <TCached>(retry, factory, webResponse, cancellationToken)), cancellationToken).ConfigureAwait(false);
return(this._cachedObject as TCached);
}
private Task OpenStream(Action <ISegmentMetadata> setMetadata, CancellationToken cancellationToken)
{
this.ThrowIfDisposed();
WebResponse webResponse = new WebResponse();
IRetry retry = this._retryManager.CreateRetry(2, 200, new Func <Exception, bool>(RetryPolicy.IsWebExceptionRetryable));
return(RetryExtensions.CallAsync(retry, (Func <Task>)(async() =>
{
long?nullable1;
long?nullable2;
while (true)
{
if (this._startOffset.HasValue && this._endOffset.HasValue)
{
nullable1 = this._endOffset;
nullable2 = this._startOffset;
nullable1 = nullable1.HasValue & nullable2.HasValue ? new long?(nullable1.GetValueOrDefault() - nullable2.GetValueOrDefault()) : new long?();
long?nullable3;
if (!nullable1.HasValue)
{
nullable2 = new long?();
nullable3 = nullable2;
}
else
{
nullable3 = new long?(nullable1.GetValueOrDefault() + 1L);
}
this._expectedBytes = nullable3;
}
else
{
this._expectedBytes = new long?();
}
this._response = await this._webReader.GetWebStreamAsync(this._actualUrl ?? this._segment.Url, false, cancellationToken, this._segment.ParentUrl, this._startOffset, this._endOffset, webResponse).ConfigureAwait(false);
if (!this._response.IsSuccessStatusCode)
{
HttpStatusCode statusCode = (HttpStatusCode)this._response.HttpStatusCode;
if (HttpStatusCode.NotFound != statusCode && !RetryPolicy.IsRetryable(statusCode))
{
this._response.EnsureSuccessStatusCode();
}
bool canRetry = await retry.CanRetryAfterDelayAsync(cancellationToken).ConfigureAwait(false);
if (!canRetry)
{
if ((Uri)null != this._actualUrl && this._actualUrl != this._segment.Url)
{
this._actualUrl = (Uri)null;
}
else
{
this._response.EnsureSuccessStatusCode();
}
}
this._response.Dispose();
this._response = (IWebStreamResponse)null;
}
else
{
break;
}
}
this._actualUrl = this._response.ActualUrl;
long?contentLength = this._response.ContentLength;
if (!this._endOffset.HasValue)
{
nullable1 = contentLength;
long?nullable3;
if (!nullable1.HasValue)
{
nullable2 = new long?();
nullable3 = nullable2;
}
else
{
nullable3 = new long?(nullable1.GetValueOrDefault() - 1L);
}
this._endOffset = nullable3;
}
if (!this._expectedBytes.HasValue)
{
this._expectedBytes = contentLength;
}
SegmentReader segmentReader1 = this;
ConfiguredTaskAwaitable <Stream> configuredTaskAwaitable = this._response.GetStreamAsync(cancellationToken).ConfigureAwait(false);
PositionStream positionStream = new PositionStream(await configuredTaskAwaitable);
segmentReader1._responseStream = (Stream)positionStream;
Task <Stream> filterStreamTask = this._segment.CreateFilterAsync(this._responseStream, cancellationToken);
if (null != filterStreamTask)
{
SegmentReader segmentReader2 = this;
configuredTaskAwaitable = filterStreamTask.ConfigureAwait(false);
Stream stream = await configuredTaskAwaitable;
segmentReader2._readStream = stream;
}
else
{
this._readStream = this._responseStream;
}
ISegmentMetadata segmentMetadata = this._webMetadataFactory.CreateSegmentMetadata(webResponse, (ContentType)null);
setMetadata(segmentMetadata);
}), cancellationToken));
}
