public void Reset(IRequestInfo requestInfo) {
_requestInfo = requestInfo;
_carriageReturn = false;
_statusBuffer.Length = 0;
_bufferPosition = 0;
_bufferDataLength = 0;
_responseDataPosition = 0;
_currentResponse = new Response(new[] { "ERROR", "INCOMPLETE" });
}
private void ProcessCommandData() {
while(true) {
// look for \r\n
for(var i = 0; i < _bufferDataLength; i++) {
var idx = _bufferPosition + i;
if(_buffer[idx] == '\r') {
_carriageReturn = true;
} else if(_carriageReturn) {
if(_buffer[idx] != '\n') {
// it wasn't a \r followed by an \n
var receivedCommandData = Encoding.ASCII.GetString(_buffer, _bufferPosition, i - 1);
throw new IncompleteCommandTerminator(receivedCommandData);
}
_carriageReturn = false;
var consumeLength = i - 1;
if(consumeLength > 0) {
// it is possible that this buffer pass is only the terminator or part of the terminator, so only
// read from it if there are non-terminator characters
_statusBuffer.Append(Encoding.ASCII.GetString(_buffer, _bufferPosition, consumeLength));
}
var status = _statusBuffer.ToString().Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
_statusBuffer.Length = 0;
_currentResponse = new Response(status);
_responseExpectedBytes = _requestInfo.ExpectedBytes(_currentResponse);
_bufferPosition += (i + 1);
_bufferDataLength -= (i + 1);
if(_responseExpectedBytes >= 0) {
if(_bufferDataLength == 0) {
Receive();
}
_responseDataPosition = 0;
_responseData = new byte[_responseExpectedBytes];
ProcessPayloadData();
}
// at this point _currentResponse should be fully populated
return;
}
}
var length = _bufferDataLength;
if(_carriageReturn) {
// we've found the \r, but the \n wasn't part of the buffer, so consume all but the last char from buffer
// since we never want to read the terminator into the status buffer
length--;
if(length < 0) {
return;
}
}
_statusBuffer.Append(Encoding.ASCII.GetString(_buffer, _bufferPosition, length));
Receive();
}
}