protected override IAsyncResult BeginReadCore(byte[] buffer, int offset, int size, AsyncCallback cback, object state)
{
HttpStreamAsyncResult ares = new HttpStreamAsyncResult(this);
ares._callback = cback;
ares._state = state;
if (_no_more_data || size == 0 || _closed)
{
ares.Complete();
return(ares);
}
int nread = _decoder.Read(buffer, offset, size);
offset += nread;
size -= nread;
if (size == 0)
{
// got all we wanted, no need to bother the decoder yet
ares._count = nread;
ares.Complete();
return(ares);
}
if (!_decoder.WantMore)
{
_no_more_data = nread == 0;
ares._count = nread;
ares.Complete();
return(ares);
}
ares._buffer = new byte[8192];
ares._offset = 0;
ares._count = 8192;
ReadBufferState rb = new ReadBufferState(buffer, offset, size, ares);
rb.InitialCount += nread;
base.BeginReadCore(ares._buffer, ares._offset, ares._count, OnRead, rb);
return(ares);
}
public override IAsyncResult BeginRead(byte[] buffer, int offset, int count,
AsyncCallback cback, object state)
{
if (disposed)
{
throw new ObjectDisposedException(GetType().ToString());
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
int len = buffer.Length;
if (offset < 0 || offset > len)
{
throw new ArgumentOutOfRangeException("offset exceeds the size of buffer");
}
if (count < 0 || offset > len - count)
{
throw new ArgumentOutOfRangeException("offset+size exceeds the size of buffer");
}
HttpStreamAsyncResult ares = new HttpStreamAsyncResult();
ares.Callback = cback;
ares.State = state;
if (no_more_data)
{
ares.Complete();
return(ares);
}
int nread = decoder.Read(buffer, offset, count);
offset += nread;
count -= nread;
if (count == 0)
{
// got all we wanted, no need to bother the decoder yet
ares.Count = nread;
ares.Complete();
return(ares);
}
if (!decoder.WantMore)
{
no_more_data = nread == 0;
ares.Count = nread;
ares.Complete();
return(ares);
}
ares.Buffer = new byte[8192];
ares.Offset = 0;
ares.Count = 8192;
ReadBufferState rb = new ReadBufferState(buffer, offset, count, ares);
rb.InitialCount += nread;
base.BeginRead(ares.Buffer, ares.Offset, ares.Count, OnRead, rb);
return(ares);
}