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https://issues.apache.org/jira/browse/SLING-1336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12841947#action_12841947
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Vidar S. Ramdal commented on SLING-1336:
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Not yet, I think. I'm hoping to get some time to do it "soon". I might get some 
time this weekend though. If anyone (including you) feels like implementing 
this now, be my guest.

> Let SlingPostServlet return JSON
> --------------------------------
>
>                 Key: SLING-1336
>                 URL: https://issues.apache.org/jira/browse/SLING-1336
>             Project: Sling
>          Issue Type: New Feature
>          Components: Servlets
>    Affects Versions: Servlets Post 2.0.4
>            Reporter: Vidar S. Ramdal
>             Fix For: Servlets Post 2.0.6
>
>
> From http://markmail.org/thread/ic2752rha4iy2s2c
> In many scenarios it would be nice to get JSON in response to a POST. You 
> could write your own post servlet to do that, but then you will not benefit 
> from the registered SlingPostOperations and SlingPostProcessors that are 
> executed by the default SlingPostServlet.
> In the case of SlingPostOperation, an implementing class is passed a 
> HtmlResponse object when run(). The HtmlResponse object is pretty agnostic to 
> response format though, the only HTML related work is in the send() method. 
> Thus, it should be possible ot replace/extend/abstract HtmlResponse with a 
> more generic response object. The send() functionality is then moved to 
> SlingPostServlet, which determines which format to return based on these 
> criteria (in order):
> 1. The Accept HTTP header - if set to "application/json" return JSON, 
> otherwise return HTML
> 2. Possibly also an :accept form field, with the same meaning as the HTTP 
> header, in case it is proven that setting the HTTP header does not work in 
> all browsers
> 3. The format of the posted data - if JSON is posted (see SLING-1172), return 
> JSON, otherwise return HTML

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