Enabling GZip compression in quarqus http application.

[16raghu]

We have a quarkus application running on Quarkus 2.16.6.Final and we are using io.quarkus:quarkus-resteasy-jsonb for REST service. We are trying to enable compression for the endpoints.
We had enabled the compression knobs[1] but we were still not able to compress the api response.

When we were debugging we found that the response servlet had the Content-Encoding header set to Identity, which might have caused to skip compression encoding.
On further debugging, we found that this code here, might be probable reason.
Here it was mentioned that we can remove this header, what would be the best way to remove Content-Encoding header without any side effects? (Can we remove it in one of the web filter?)

[1] HTTP Compression properties in application.properties.

......
quarkus.http.enable-compression=true
quarkus.http.compress-media-types=text/html,text/plain,text/xml,text/css,text/javascript,application/javascript,application/json
......

[mschorsch]

The configuration property quarkus.http.enable-compression has no effect on compression support of RESTEasy Classic endpoints.

https://quarkus.io/version/2.16/guides/resteasy#gzip-support

You can enable GZip Support with the following properties:

quarkus.resteasy.gzip.enabled=true 
quarkus.resteasy.gzip.max-input=10M 

[16raghu]

Thanks for looking into this.

Those 2 properties is also set but api response were not encoded to GZIP. It would have no effect on compression as Content-Encoding header to Identity.

If I forcefully remove the Content-Encoding header in one of the web filter then there is a compression to GZIP.

I wanted to confirm if I can remove Content-Encoding header without any repercussions or what would be the best way to do this?

[mschorsch]

@geoand Sounds like a bug?

[geoand]

@mkouba would know more

[mkouba]

I beliebe that this was fixed in Quarkus 3.0+; see #31438, #26112 and #31415.

I'm not really sure if we would be able to backport this fix in 2.16 though.

[16raghu]

After moving to 3.6. Fixed gzip.