@Override
public ProtocolVersion parseProtocolVersion(CharArrayBuffer buffer, ParserCursor cursor)
throws ParseException {
if (buffer == null) {
throw new IllegalArgumentException("Char array buffer may not be null");
}
if (cursor == null) {
throw new IllegalArgumentException("Parser cursor may not be null");
}
final int protolength = ICY_PROTOCOL_NAME.length();
int indexFrom = cursor.getPos();
int indexTo = cursor.getUpperBound();
skipWhitespace(buffer, cursor);
int i = cursor.getPos();
// long enough for "HTTP/1.1"?
if (i + protolength + 4 > indexTo) {
throw new ParseException(
"Not a valid protocol version: " + buffer.substring(indexFrom, indexTo));
}
// check the protocol name and slash
if (!buffer.substring(i, i + protolength).equals(ICY_PROTOCOL_NAME)) {
return super.parseProtocolVersion(buffer, cursor);
}
cursor.updatePos(i + protolength);
return createProtocolVersion(1, 0);
}
@Override
public boolean hasProtocolVersion(CharArrayBuffer buffer, ParserCursor cursor) {
boolean superFound = super.hasProtocolVersion(buffer, cursor);
if (superFound) {
return true;
}
int index = cursor.getPos();
final int protolength = ICY_PROTOCOL_NAME.length();
if (buffer.length() < protolength) return false; // not long enough for "HTTP/1.1"
if (index < 0) {
// end of line, no tolerance for trailing whitespace
// this works only for single-digit major and minor version
index = buffer.length() - protolength;
} else if (index == 0) {
// beginning of line, tolerate leading whitespace
while ((index < buffer.length()) && HTTP.isWhitespace(buffer.charAt(index))) {
index++;
}
} // else within line, don't tolerate whitespace
return index + protolength <= buffer.length()
&& buffer.substring(index, index + protolength).equals(ICY_PROTOCOL_NAME);
}