Quarkus Rest AbstractJsonMessageBodyReader with wrong case-sensitive content-type header handling

[antonwiens]

I updated to quarkus 3.9 and noticed different behavior in content-type matching.
As of RFC (https://datatracker.ietf.org/doc/html/rfc2045#section-5.1) the content-type header value should be handled case-insensitive but the handling in quarkus resteasy-reactive is case-sensitive. only the subtype-Part is handled case-insensitive in the AbstractJsonMessageBodyReader:

quarkus/independent-projects/resteasy-reactive/common/runtime/src/main/java/org/jboss/resteasy/reactive/common/providers/serialisers/AbstractJsonMessageBodyReader.java

Line 24 in cfcd5a3

boolean isApplicationMediaType = "application".equals(mediaType.getType());

This issue occured to me, because i updated from Quarkus 3.2.8 to quarkus 3.9.4 and my client sends "Application/json" as content-type which is rejected with a message containing that no messagebodyreader can be found.

Can you please make this case-insensitive again?

[antonwiens]

This part:
subtype.endsWith("+json")

should also be changed to be case insensitive

[geoand]

Would you like to provide a PR with the fix you have in mind?

[quarkus-bot]

/cc @FroMage (resteasy-reactive), @stuartwdouglas (resteasy-reactive)

[antonwiens]

Would you like to provide a PR with the fix you have in mind?

Sure, i can try it and add some tests.