if (connected) return;
        connection.connect();
        connected = true;
    }

    private void handshake() throws IOException {
        if (handshakeComplete) return;
        doHandshake();
        handshakeComplete = true;
    }

    public URL getURL() {
        return connection.getURL();
    }

    public int getContentLength() {
        try {
            handshake();

        this.connection.connect();
        this.connected = true;
    }


    private void handshake () {
        if ( this.handshakeComplete )
            return;
        try {
            doHandshake();
        }
        catch (
            IOException |
            GeneralSecurityException e ) {
            throw new RuntimeCIFSException("NTLM handshake failed", e);
        }