private void AsyncEndRead(IAsyncResult asyncResult)
{
Debug.Assert(asyncResult != null && asyncResult.IsCompleted, "asyncResult.IsCompleted");
AsyncStateBag asyncStateBag = asyncResult.AsyncState as AsyncStateBag;
PerRequest pereq = asyncStateBag == null ? null : asyncStateBag.PerRequest;
int count = 0;
try
{
this.CompleteCheck(pereq, InternalError.InvalidEndReadCompleted);
pereq.SetRequestCompletedSynchronously(asyncResult.CompletedSynchronously); // BeginRead
this.SetCompletedSynchronously(asyncResult.CompletedSynchronously);
Stream httpResponseStream = Util.NullCheck(pereq.ResponseStream, InternalError.InvalidEndReadStream); // get the http response stream.
Stream outResponseStream = Util.NullCheck(this.outputResponseStream, InternalError.InvalidEndReadCopy);
byte[] buffer = Util.NullCheck(this.asyncStreamCopyBuffer, InternalError.InvalidEndReadBuffer);
count = httpResponseStream.EndRead(asyncResult);
this.usingBuffer = false;
if (count > 0)
{
outResponseStream.Write(buffer, 0, count);
}
if (count > 0 && buffer.Length > 0 && httpResponseStream.CanRead)
{
if (!asyncResult.CompletedSynchronously)
{
// if CompletedSynchronously then caller will call and we reduce risk of stack overflow
this.ReadResponseStream(asyncStateBag);
}
}
else
{
// Debug.Assert(this.ContentLength < 0 || outResponseStream.Length == this.ContentLength, "didn't read expected ContentLength");
if (outResponseStream.Position < outResponseStream.Length)
{
// In Silverlight, generally 3 bytes less than advertised by ContentLength are read
((MemoryStream)outResponseStream).SetLength(outResponseStream.Position);
}
pereq.SetComplete();
this.SetCompleted();
}
}
catch (Exception e)
{
if (this.HandleFailure(e))
{
throw;
}
}
finally
{
this.HandleCompleted(pereq);
}
}
protected bool HandleFailure(PerRequest pereq, Exception e)
{
if (pereq != null)
{
if (this.IsAborted)
{
pereq.SetAborted();
}
else
{
pereq.SetComplete();
}
}
return(this.HandleFailure(e));
}
protected override void AsyncEndGetResponse(IAsyncResult asyncResult)
{
Debug.Assert(asyncResult != null && asyncResult.IsCompleted, "asyncResult.IsCompleted");
AsyncStateBag asyncStateBag = asyncResult.AsyncState as AsyncStateBag;
PerRequest pereq = asyncStateBag == null ? null : asyncStateBag.PerRequest;
try
{
if (this.IsAborted)
{
if (pereq != null)
{
pereq.SetComplete();
}
this.SetCompleted();
}
else
{
this.CompleteCheck(pereq, InternalError.InvalidEndGetResponseCompleted);
pereq.SetRequestCompletedSynchronously(asyncResult.CompletedSynchronously);
this.SetCompletedSynchronously(asyncResult.CompletedSynchronously);
ODataRequestMessageWrapper requestMessage = Util.NullCheck(pereq.Request, InternalError.InvalidEndGetResponseRequest);
// the httpWebResponse is kept for batching, discarded by non-batch
IODataResponseMessage response = this.RequestInfo.EndGetResponse(requestMessage, asyncResult);
pereq.ResponseMessage = Util.NullCheck(response, InternalError.InvalidEndGetResponseResponse);
this.SetHttpWebResponse(pereq.ResponseMessage);
Debug.Assert(null == pereq.ResponseStream, "non-null async ResponseStream");
Stream httpResponseStream = null;
if (HttpStatusCode.NoContent != (HttpStatusCode)response.StatusCode)
{
httpResponseStream = response.GetStream();
pereq.ResponseStream = httpResponseStream;
}
if ((null != httpResponseStream) && httpResponseStream.CanRead)
{
if (null == this.outputResponseStream)
{
// this is the stream we copy the reponse to
this.outputResponseStream = Util.NullCheck(this.GetAsyncResponseStreamCopy(), InternalError.InvalidAsyncResponseStreamCopy);
}
if (null == this.asyncStreamCopyBuffer)
{
// this is the buffer we read into and copy out of
this.asyncStreamCopyBuffer = Util.NullCheck(this.GetAsyncResponseStreamCopyBuffer(), InternalError.InvalidAsyncResponseStreamCopyBuffer);
}
// Make async calls to read the response stream
this.ReadResponseStream(asyncStateBag);
}
else
{
pereq.SetComplete();
this.SetCompleted();
}
}
}
catch (Exception e)
{
if (this.HandleFailure(e))
{
throw;
}
}
finally
{
this.HandleCompleted(pereq);
}
}
