Tenteikura.Fetcher.OnStreamRead C# (CSharp) Method

        private void OnStreamRead(IAsyncResult result)
        {
            RequestState state = result.AsyncState as RequestState;
            // Retrieve the ResponseStream that was set in RespCallback.
            Stream responseStream = state.ResponseStream;

            // Read rs.BufferRead to verify that it contains data.
            int read = responseStream.EndRead(result);
            if (read > 0)
            {
                // Prepare a Char array buffer for converting to Unicode.
                Char[] charBuffer = new Char[RequestState.BUFFER_SIZE * 2];

                // Convert byte stream to Char array and then to String.
                // len contains the number of characters converted to Unicode.
                int len =
                   state.StreamDecode.GetChars(state.BufferRead, 0, read, charBuffer, 0);

                String str = new String(charBuffer, 0, len);

                // Append the recently read data to the RequestData stringbuilder
                // object contained in RequestState.
                state.RequestData.Append(str);

                // Continue reading data until
                // responseStream.EndRead returns –1.
                IAsyncResult ar = responseStream.BeginRead(
                   state.BufferRead, 0, RequestState.BUFFER_SIZE,
                   new AsyncCallback(OnStreamRead), state);
            }
            else
            {
                if (state.RequestData.Length > 0)
                {
                    DownloadedPage = new Page(state.RequestData.ToString(), Uri);
                }
                Completed = true;
                // Close down the response stream.
                responseStream.Close();
            }
        }