private static void AsyncEndRead(IAsyncResult asyncResult)
{
Debug.Assert(asyncResult != null && asyncResult.IsCompleted, "asyncResult.IsCompleted");
QueryResult state = asyncResult.AsyncState as QueryResult;
int count = 0;
try
{
CompleteCheck(state, InternalError.InvalidEndReadCompleted);
state.CompletedSynchronously &= asyncResult.CompletedSynchronously; // BeginRead
Stream stream = Util.NullCheck(state.asyncResponseStream, InternalError.InvalidEndReadStream);
Stream outputResponse = Util.NullCheck(state.responseStream, InternalError.InvalidEndReadCopy);
byte[] buffer = Util.NullCheck(state.asyncStreamCopyBuffer, InternalError.InvalidEndReadBuffer);
count = stream.EndRead(asyncResult);
state.usingBuffer = false;
if (0 < count)
{
#if StreamContainsBuffer
if (state.responseStreamIsCopyBuffer)
{ // we may have asked for, but not received the entire stream
outputResponse.Position = outputResponse.Position + count;
}
else
#endif
{
outputResponse.Write(buffer, 0, count);
}
}
if (0 < count && 0 < buffer.Length && stream.CanRead)
{
if (!asyncResult.CompletedSynchronously)
{
// if CompletedSynchronously then caller will call and we reduce risk of stack overflow
QueryResult.ReadResponseStream(state);
}
}
else
{
#if StreamContainsBuffer
Debug.Assert(!state.responseStreamIsCopyBuffer || (outputResponse.Position == outputResponse.Length), "didn't read expected count");
#endif
// Debug.Assert(state.ContentLength < 0 || outputResponse.Length == state.ContentLength, "didn't read expected ContentLength");
if (outputResponse.Position < outputResponse.Length)
{
// In Silverlight, generally 3 bytes less than advertised by ContentLength are read
((MemoryStream)outputResponse).SetLength(outputResponse.Position);
}
state.SetCompleted();
}
}
catch (Exception e)
{
if (state.HandleFailure(e))
{
throw;
}
}
finally
{
state.HandleCompleted();
}
}
private static void AsyncEndGetResponse(IAsyncResult asyncResult)
{
Debug.Assert(asyncResult != null && asyncResult.IsCompleted, "asyncResult.IsCompleted");
QueryResult state = asyncResult.AsyncState as QueryResult;
try
{
CompleteCheck(state, InternalError.InvalidEndGetResponseCompleted);
state.CompletedSynchronously &= asyncResult.CompletedSynchronously; // BeginGetResponse
HttpWebRequest httpWebRequest = Util.NullCheck(state.Request, InternalError.InvalidEndGetResponseRequest);
// the httpWebResponse is kept for batching, discarded by non-batch
HttpWebResponse response = null;
try
{
response = (HttpWebResponse)httpWebRequest.EndGetResponse(asyncResult);
}
catch (WebException e)
{
response = (HttpWebResponse)e.Response;
if (null == response)
{
throw;
}
}
state.SetHttpWebResponse(Util.NullCheck(response, InternalError.InvalidEndGetResponseResponse));
Debug.Assert(null == state.asyncResponseStream, "non-null asyncResponseStream");
Stream stream = null;
if (HttpStatusCode.NoContent != response.StatusCode)
{
stream = response.GetResponseStream();
state.asyncResponseStream = stream;
}
if ((null != stream) && stream.CanRead)
{
if (null == state.responseStream)
{ // this is the stream we copy the reponse to
state.responseStream = Util.NullCheck(state.GetAsyncResponseStreamCopy(), InternalError.InvalidAsyncResponseStreamCopy);
}
if (null == state.asyncStreamCopyBuffer)
{ // this is the buffer we read into and copy out of
state.asyncStreamCopyBuffer = Util.NullCheck(state.GetAsyncResponseStreamCopyBuffer(), InternalError.InvalidAsyncResponseStreamCopyBuffer);
}
// Make async calls to read the response stream
QueryResult.ReadResponseStream(state);
}
else
{
state.SetCompleted();
}
}
catch (Exception e)
{
if (state.HandleFailure(e))
{
throw;
}
}
finally
{
state.HandleCompleted();
}
}
