private static void OnHeaderRead(IAsyncResult ar)
{
MessageReadState state = (MessageReadState)ar.AsyncState;
int n = state.Stream.EndRead(ar);
state.HeaderLength += n;
int index = state.HeaderLength;
int length = state.Header.Length;
if (index == length)
{
// Allocate the body. We are done reading the header
byte[] data = new byte[state.GetDataLength()];
state.Data = data;
state.Stream.BeginRead(data, 0, data.Length, OnDataRead, state);
}
else if (n > 0)
{
// Read the rest of the header
state.Stream.BeginRead(state.Header, index, length - index, OnHeaderRead, state);
}
else
{
// The stream has ended, but we have not finished reading the header
state.Finish();
}
}
public static AsyncResult BeginRead(Stream stream)
{
AsyncResult ar = new AsyncResult();
MessageReadState state = new MessageReadState(stream, ar);
stream.BeginRead(state.Header, 0, state.Header.Length, OnHeaderRead, state);
return(ar);
}