quarkus: GZip filter doesn't work

Hello everyone. First of all: +1 for this topic. The workaround from @dfa1 does not work for me, the interceptor methods are called in a wrong Order (aroundWriteTo first), which is kind of confusing to me…

Nevertheless I rewrote a workaround which is working for me (even shorter):

@Provider
public class GzipSupport  implements ContainerResponseFilter {
    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext)
            throws IOException {
        String encoding = requestContext.getHeaderString(HttpHeaders.ACCEPT_ENCODING);
        if(encoding != null && encoding.contains("gzip")) {
            responseContext.getHeaders().put(HttpHeaders.CONTENT_ENCODING, Arrays.asList("gzip"));
            OutputStream outputStream = responseContext.getEntityStream();
            responseContext.setEntityStream(new GZIPOutputStream(outputStream));
        }
    }
}

As a temporary workaround I’m using the following code since June:

/**
 * Custom gzip support, workaround for https://github.com/quarkusio/quarkus/issues/9671
 *
 * NB: must be deleted when quarkus will have proper gzip support.
 */
@Provider
public class GzipSupport implements ReaderInterceptor, WriterInterceptor {

    public static final String COMPRESS_RESPONSE = "__COMPRESS_RESPONSE__";

    @Override
    public Object aroundReadFrom(ReaderInterceptorContext context) throws IOException {
        MultivaluedMap<String, String> headers = context.getHeaders();
        String wantedEncoding = headers.getFirst(HttpHeaders.ACCEPT_ENCODING);
        if (wantedEncoding != null && wantedEncoding.contains("gzip")) {
            context.setProperty(COMPRESS_RESPONSE, true);
        }
        return context.proceed();
    }

    @Override
    public void aroundWriteTo(WriterInterceptorContext context) throws IOException {
        if (Boolean.TRUE.equals(context.getProperty(COMPRESS_RESPONSE))) {
            MultivaluedMap<String, Object> headers = context.getHeaders();
            headers.add(HttpHeaders.CONTENT_ENCODING, "gzip");
            OutputStream outputStream = context.getOutputStream();
            context.setOutputStream(new GZIPOutputStream(outputStream));
        }
        context.proceed();
    }
}

@geoand do we have a GZip filter in RESTEasy Reactive?

@StFS Attached PR incoming. This should fix a lot of config issues for Resteasy Standalone. You’ll configure via application.properties

@jessequinn @gastaldi That line in the resteasy interceptor looks correct

     Object encoding = context.getHeaders().getFirst(HttpHeaders.CONTENT_ENCODING);

In this case the headers being checked are response headers not request headers. When accepting gzip from a request the server should respond with the headers Content-Encoding: gzip

@liweinan, can you check this please?

I would like to work on that.