public void encode_in(final NdrBuffer _dst) throws NdrException {
            this.handle.encode(_dst);
            _dst.enc_ndr_long(this.access_mask);
            this.sid.encode(_dst);
        }

        @Override
        public void decode_out(final NdrBuffer _src) throws NdrException {
            this.domain_handle.decode(_src);
            this.retval = _src.dec_ndr_long();
        }
    }

    /**

        public void encode_in(final NdrBuffer _dst) throws NdrException {
            handle.encode(_dst);
            _dst.enc_ndr_long(access_mask);
            sid.encode(_dst);
        }

        @Override
        public void decode_out(final NdrBuffer _src) throws NdrException {
            domain_handle.decode(_src);
            retval = _src.dec_ndr_long();
        }
    }

    /**

        // Should write FileInformation data + 6 bytes padding
        assertEquals(46, written); // 40 + 6

        // Verify encode was called
        verify(mockFileInfo).encode(buffer, 0);

        // Check that 6 bytes of padding are zeros
        for (int i = 40; i < 46; i++) {
            assertEquals(0, buffer[i]);
        }
    }

    @Test

        final int i = this.index - this.start;
        final int n = (i + m & ~m) - i;
        advance(n);
        return n;
    }

    /**
     * Encodes a small integer (1 byte) in NDR format.
     *
     * @param s the small integer value to encode
     */
    public void enc_ndr_small(final int s) {
        this.buf[this.index] = (byte) (s & 0xFF);
        advance(1);
    }

    /**

	buf.WriteString(xxml.Header)
	if err := xxml.NewEncoder(&buf).Encode(response); err != nil {
		bugLogIf(GlobalContext, err)
		return nil
	}
	return buf.Bytes()
}

// Encodes the response headers into JSON format.
func encodeResponseJSON(response any) []byte {
	var bytesBuffer bytes.Buffer
	e := json.NewEncoder(&bytesBuffer)
	e.Encode(response)
	return bytesBuffer.Bytes()
}

// Write parts count

     */
    @Override
    public int size() {
        return this.len;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Encodable#encode(byte[], int)
     */
    @Override
    public int encode(final byte[] dst, final int dstIndex) {
        System.arraycopy(this.bytes, this.off, dst, dstIndex, this.len);
        return this.len;
    }

    /**
     * Encode the input parameters for this DCERPC message.
     * @param buf the buffer to encode into
     * @throws NdrException if encoding fails
     */
    public abstract void encode_in(NdrBuffer buf) throws NdrException;

    /**
     * Decode the output parameters from this DCERPC message.
     * @param buf the buffer to decode from
     * @throws NdrException if decoding fails

        return transform;
    }

    /**
     * Encode to byte array for SMB2 READ/WRITE channel info
     *
     * @param dst destination buffer
     * @param dstIndex starting index
     * @return number of bytes written
     */
    public int encode(byte[] dst, int dstIndex) {
        return transform.encode(dst, dstIndex);
    }

    @Override
    public String toString() {

## Base64 vs Files { #base64-vs-files }

Consider first if you can use [Request Files](../tutorial/request-files.md) for uploading binary data and [Custom Response - FileResponse](./custom-response.md#fileresponse--fileresponse-) for sending binary data, instead of encoding it in JSON.

JSON can only contain UTF-8 encoded strings, so it can't contain raw bytes.

        when(mockInputData.encode(any(byte[].class), anyInt())).thenReturn(100);
        request.setInputData(mockInputData);
        byte[] buffer = new byte[1024];

        int written = request.writeBytesWireFormat(buffer, 0);

        assertTrue(written > 57);
        verify(mockInputData).encode(any(byte[].class), anyInt());
    }

    @Test