Hi Carsten,
Sounds good to clean up before doing the upgrade. Let us track the effort in 2 
separate JIRA issues for Multipart-POST and parameter handling. Then we can 
collect some entry points to code in them to give a better overview on the 
actual effort.
@Carsten: Can you create those ticket and link them to 
https://issues.apache.org/jira/browse/SLING-10000?

Thanks,
Konrad


> On 20. Nov 2024, at 07:26, Carsten Ziegeler <[email protected]> wrote:
> 
> Trying to bring this old thread to life again :)
> 
> It seems that most of us agree on these two things: we should some support 
> Jakarta Servlet for Sling and whatever we do, it should allow to continue to 
> run existing code without changes.
> 
> However, before we get there, we should make us of Servlet 3 as this will 
> most likely make the Jakarata support much easier.
> 
> As Sling was built on top of Servlet 2, it started to use commons-fileupload 
> for handling multipart post requests. We should replace this with using the 
> Servlet 3 parts API. This should be straight forward.
> 
> In addition, we have a lot of legacy handling for request parameters 
> especially around encoding in Sling Engine - this is pretty complicated code 
> which in theory shouldn't be necessary anymore and we could 100% rely on the 
> servlet engine.
> 
> It would be great if there is someone volunteering to look into these. I see 
> at least the first one as a prerequisite.
> 
> Regards
> Carsten
> 
> On 09.10.2023 15:37, Robert Munteanu wrote:
>> Hi,
>> +1 from me on moving to Jakarta Servlet, for the reasons you outlined.
>> On Tue, 2023-10-03 at 14:08 +0200, Carsten Ziegeler wrote:
>>> Now I totally agree that this must come with nearly zero changes
>>> required for our users. That's why I only suggested solutions where
>>> this
>>> should be true.
>> On a related topic, there are source-level solutions for migrating to
>> jakarta.servlet, e.g. [1].
>> These would be complementary to the eclipse transformer, which looks
>> like a nice fit as it has both bnd and maven plugins.
>> Thanks,
>> Robert
>> [1]:
>> https://docs.openrewrite.org/recipes/java/migrate/jakarta/javaxservlettojakartaservlet
> 
> -- 
> Carsten Ziegeler
> Adobe
> [email protected]
> 

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