Jason Chaffee created CXF-4782:
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             Summary: Cannot easily override the Accept content type
                 Key: CXF-4782
                 URL: https://issues.apache.org/jira/browse/CXF-4782
             Project: CXF
          Issue Type: Bug
          Components: JAX-RS
    Affects Versions: 2.7.2
            Reporter: Jason Chaffee


I need to add the ability to override the Accept header using a query 
parameter.  I know CXF supports "_type", but there are two problems with the 
way that is implemented that won't work for us.  1) We need to parameter name 
to be "format" instead of "_type" and currently this is not configurable.  2) 
We need to be able to pass in a map of special type that we would like to map.  
This would added to the SHORTCUTS.  

Since the current RequestPreProcessor doesn't allow for either one of those, I 
decided to write a JAXRS Filter/RequestHandler.  The problem I found is that 
the JAXRSInInterceptor has already looked up the acceptContentType before my 
RequestHandler.handleRequest() method is called.  Thus, I am unable to override 
it using this approach.  

Ideally, the fix would be to simply make them configurable in the 
RequestPreProcessor.  However, I am not quite sure how that would be done since 
this is not a class that is managed/configured in the IoC/DI container.  

Another approach would be to call the RequestHandlers before resolving the 
acceptContentType.  

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