@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON }) returns JSON as default

[Charissa Willard]

I am using genson 1.4 and jersey 2.12. I also added the @XmlRootElement annotation to the Java class I'm using for the response object. I set the @Produces annotation to handle both XML & JSON such that I get XML back as the default. Technically, the first one in the @Produces annotation list should be used if the Accept header isn't specified. However, I'm getting JSON back if the Accept header with application/xml isn't included in the curl command. If I specify -H "Accept: application/xml" in the curl command, I get back the XML representation. Also, if I just specify @Produces({ MediaType.APPLICATION_XML}), I get back the XML representation. Does genson default to the first item specified in the @Produces annotation?

I also specify -H "Content-Type: application/json" -in the curl command since I'm sending JSON in the entity object.

[Eugen Cepoi]

Hi Charissa,

I suspect maybe there is something weird in how Jersey is using these annotations and it might be because we don't check the media type in here https://github.com/owlike/genson/blob/master/genson/src/main/java/com/owlike/genson/ext/jaxrs/GensonJsonConverter.java#L65-L70.

Feel free to open a PR that would check the media type in isWriteable/isReadable to return false if it's not JSON (+some tests to confirm it addresses your use case). If all looks good I could merge and do a release with your changes.

Le jeu. 5 déc. 2019 à 11:24, Charissa Willard <charissa...@comcast.net> a écrit :

I am using genson 1.4 and jersey 2.12. I also added the @XmlRootElement annotation to the Java class I'm using for the response object. I set the @Produces annotation to handle both XML & JSON such that I get XML back as the default. Technically, the first one in the @Produces annotation list should be used if the Accept header isn't specified. However, I'm getting JSON back if the Accept header with application/xml isn't included in the curl command. If I specify -H "Accept: application/xml" in the curl command, I get back the XML representation. Also, if I just specify @Produces({ MediaType.APPLICATION_XML}), I get back the XML representation. Does genson default to the first item specified in the @Produces annotation?

I also specify -H "Content-Type: application/json" -in the curl command since I'm sending JSON in the entity object.

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