Spring Boot (RestController) - support for application/octet-stream using InputStream

WebConfig.groovy

/**
 * Adds support for application/octet-stream through a RestController using streams.
 */
@Configuration
class WebConfig extends WebMvcConfigurationSupport {
    @Override
    protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(new AbstractHttpMessageConverter<InputStream>(MediaType.APPLICATION_OCTET_STREAM) {
            protected boolean supports(Class<?> clazz) {
                return InputStream.isAssignableFrom(clazz)
            }

            protected InputStream readInternal(Class<? extends InputStream> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
                return inputMessage.body
            }

            protected void writeInternal(InputStream inputStream, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {
                IOUtils.copy(inputStream, outputMessage.body)
            }
        })

        super.configureMessageConverters(converters);
    }
}

Thanks for this, really useful. Note that I made a Java version from the groovy one.