server.txt

/*
        Take the buffer and read the first 8 bits or first byte
        firstByte = buffer.readUInt8(0)
        
            >>> always results in non-negative
            returns an unsigned 32-bit integer

        Shift firstByte to the right by 7 bits
        firstByte (10000000) >>> 7 (00000111)

        We're only interested in the farthest
        right bit and therefore we are using a
        bitwise & with 1 to get the farthest
        right bit value

        10000000
        00001111
            
    */

    // Not used now, but place holder
    // switch(opCode) {
    //     case constants.CONTINUATION_FRAME:
    //         // Non-control
    //         console.log('continuation frame');
    //     break;
    //     case constants.TEXT_FRAME: // They have `opCode !== 0x01` for this
    //         // Non-control
    //         console.log('text frame');
    //     break;
    //     case constants.BINARY_FRAME:
    //         // Non-control
    //         console.log('binary frame');
    //     break;
    //     // reserved for further non-control frames
    //     case constants.NONCONTROL_FRAME_3:
    //     case constants.NONCONTROL_FRAME_4:
    //     case constants.NONCONTROL_FRAME_5:
    //     case constants.NONCONTROL_FRAME_6:
    //     case constants.NONCONTROL_FRAME_7:
    //         console.log('further non-control frames');
    //     break;
    //     // denotes a connection close
    //     case constants.CONNECTION_CLOSE:
    //         // Control
    //         console.log('connection close');
    //         return null;
    //     break;
    //     // denotes a ping
    //     case constants.PING:
    //         // Control
    //         console.log('ping');
    //     break;
    //     // denotes a pong
    //     case constants.PONG:
    //         // Control
    //         console.log('pong');
    //     break;
    //     case constants.CONTROL_FRAME_B:
    //     case constants.CONTROL_FRAME_C:
    //     case constants.CONTROL_FRAME_D:
    //     case constants.CONTROL_FRAME_E:
    //     case constants.CONTROL_FRAME_F:
    //         // Reserved for further control frames.
    //         console.log('further non-control frames');
    //     break;
    //     default:
    //         return null;
    // }



    /*
        We are only interested in the Payload Length and
        therefore have a 0 for the MASK
        01111111 (0x7F -> 127)
    */


    // we were already reading data in a BE type of way from left to right. Why
    // didn't we do the same on line 47?