Setting media type (json for eg) manually not working for certain cases. #482

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1. chirans

   changed the title [-]Customizing media type (json for eg) not working[/-] [+]Setting media type (json for eg) manually not working for certain cases.[/+] on Sep 21, 2016
2. jknack

   added

   bug

   jackson2

   on Sep 26, 2016
3. jknack

   added this to the 1.0.0 milestone on Sep 26, 2016
4. jknack

   closed this as completedin 6f48550on Sep 26, 2016
5. jknack commented on Sep 26, 2016

   

   jknack

   on Sep 26, 2016

   Last edited by jknack

   Member

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   There two issues here:

   1-- writing raw json doesn't work bc Jackson outputs String, primitives or similar as valid JSON. There are a lot of discussion around this... but there is no formal/unique solution.

   For this specific use case I suggest you to write a custom render, like:

       /** Raw JSON renderer .*/
       renderer((value, ctx) -> {
         if (value instanceof String && ctx.accepts(MediaType.json)) {
           ctx.send(value.toString());
         }
       });
   
       use(new Jackson());

   So, here you test for a String output and application/json and write directly.

   Please note the custom renderer is on top of the Jackson module. Renderers in jooby are executed in the order they were provided.

   2-- We do have a bug while returning results from Deferred API, this is now fixed and this is now possible:

       get("/482/raw", promise(deferred -> {
         exec.execute(deferred.run(() -> Results.json("{\"status\":\"success\"}")));
       }));
6. jknack

   removed

   jackson2

   on Sep 27, 2016
7. paul-hammant commented on Jan 30, 2018

   

   paul-hammant

   on Jan 30, 2018

   Contributor

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   Would love a one-liner for this: stringsWillBeJson();