Hey Bill,
thanks for your reply.
Am 07.06.2014 um 22:08 schrieb Bill Burke <bbu...@redhat.com>:
> Unfortunately, the JAX-RS TCK expects that the MBW is not matched until
> after the WriterInterceptor is invoked. We used to match prior to
What a c$%@!
> invoking the interceptor chain...
Which makes so much sense
>
> So, you have 2 options:
>
> 1. In your WriterInterceptor buffer the json marshalling, change the
> content header, flush the buffer.
I have this block in aroundWriteTo:
try {
context.proceed();
} finally {
context.getHeaders().get("Content-Type").clear();
context.getHeaders().putSingle("Content-Type",APPLICATION_JAVASCRIPT);
}
But that header change is not recorded in the output.
And when I understand you correctly above, this would be an issue anyway,
because the changed header would influence the MBW matcher which runs after the
interceptor.
> 2. Write a special MBW that delegates to the JSON writer and sets the
> content header before doing this.
Sounds like a plan to investigate.
Thanks
Heiko
>
> Make sense?
>
> On 6/7/2014 1:00 PM, Heiko W.Rupp wrote:
>> Hey,
>>
>> I have a use case where the user is requesting jsonp encoding e.g. via
>> custom media type or a .jsonw ending.
>>
>> Anyway. I can intercept the call and surround with "jsonp();" successfully,
>> but the returned
>> content-type needs to be changed to "application/javascript".
>>
>> I could accept that as incoming type, but then RE is complaining about no
>> matching MessageBodyWriter.
>>
>> So I am thinking of using ContainerWriteFilter to re-write this, but the
>> calls seem to be
>>
>> MessageHandler method (@GET foo() {} ) (1)
>> ContainerWriteFilter (2)
>> <message body writer> (3)
>> WriterInterceptor. (4)
>> (5)
>>
>> So when I rewrite the content header in (2) a the mbw in (3) complains about
>> wrong type and
>> in (4) I can not check if the desired content type is my custom one to
>> request the wrapping or not.
>>
>> So I would need to run a ContainerWriteFilter at (5) to rewrite the header
>> *after* the interceptor has run.
>>
>> In RHQ I solved that with a normal servlet filter, but it looks like this
>> does not work here because
>> of Async processing (and rewriting the filter with an AsyncListener has its
>> own issues )
>>
>> Thanks
>> Heiko
>>
>>
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>
> --
> Bill Burke
> JBoss, a division of Red Hat
> http://bill.burkecentral.com
>
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> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and their
> applications. Written by three acclaimed leaders in the field,
> this first edition is now available. Download your free book today!
> http://p.sf.net/sfu/NeoTech
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