public override IAsyncResult BeginRead(
byte [] buffer, int offset, int count, AsyncCallback cback, object state)
{
if (disposed)
{
throw new ObjectDisposedException(GetType().ToString());
}
int nread = FillFromBuffer(buffer, offset, count);
if (nread > 0 || nread == -1)
{
var ares = new HttpStreamAsyncResult();
ares.Buffer = buffer;
ares.Offset = offset;
ares.Count = count;
ares.Callback = cback;
ares.State = state;
ares.SyncRead = nread;
ares.Complete();
return(ares);
}
// Avoid reading past the end of the request to allow
// for HTTP pipelining
if (remaining_body >= 0 && count > remaining_body)
{
count = (int)Math.Min(Int32.MaxValue, remaining_body);
}
return(stream.BeginRead(buffer, offset, count, cback, state));
}
public ReadBufferState(
byte [] buffer, int offset, int count, HttpStreamAsyncResult ares)
{
Buffer = buffer;
Offset = offset;
Count = count;
InitialCount = count;
Ares = 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' + 'count' exceeds the size of buffer.");
}
var 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;
var rb = new ReadBufferState(buffer, offset, count, ares);
rb.InitialCount += nread;
base.BeginRead(ares.Buffer, ares.Offset, ares.Count, OnRead, rb);
return(ares);
}
