/*
* Quick lookahead for the start state looking for a request method or a
* HTTP version, otherwise skip white space until something else to parse.
*/
private boolean quickStart(ByteBuffer buffer) {
if (_requestHandler != null) {
_method = HttpMethod.lookAheadGet(buffer);
if (_method != null) {
_methodString = _method.asString();
buffer.position(buffer.position() + _methodString.length() + 1);
setState(State.SPACE1);
return false;
}
} else if (_responseHandler != null) {
_version = HttpVersion.lookAheadGet(buffer);
if (_version != null) {
buffer.position(buffer.position() + _version.asString().length() + 1);
setState(State.SPACE1);
return false;
}
}
// Quick start look
while (_state == State.START && buffer.hasRemaining()) {
int ch = next(buffer);
if (ch > SPACE) {
_string.setLength(0);
_string.append((char) ch);
setState(_requestHandler != null ? State.METHOD : State.RESPONSE_VERSION);
return false;
} else if (ch == 0) break;
else if (ch < 0) throw new BadMessageException();
// count this white space as a header byte to avoid DOS
if (_maxHeaderBytes > 0 && ++_headerBytes > _maxHeaderBytes) {
log.warn("padding is too large > {}", _maxHeaderBytes);
throw new BadMessageException(HttpStatus.BAD_REQUEST_400);
}
}
return false;
}
