How to parse and validate a WebSocket frame in Java?

Question

I wrote a WebSocket frame decoder in Java:

private byte[] decodeFrame(byte[] _rawIn) {
        int maskIndex = 2;
        byte[] maskBytes = new byte[4];

           


        

Answer 1

The websocket protocol does not include checksums of any kind, if that's what you're looking for. If there's an error in a data frame the only way you'll know is because the data comes out wrong or because subsequent frames come out "funny" (unexpected opcode, longer or shorter than expected, etc).