[vlc-devel] ALPN support on Apple platforms

Rémi Denis-Courmont remi at remlab.net
Sun Nov 6 22:25:09 CET 2016

Le lauantaina 5. marraskuuta 2016, 17.51.37 EET David Fuhrmann a écrit :
> 3) Declare ALPN as not supported on Darwin platforms right now
> - Currently, in practice all web services should be working perfectly fine
> without HTTP/2 and ALPN.

Possible but contextually irrelevant unless you imply writing yet another 
HTTP(S) stack in VLC, one that supports neither HTTPbis and nor tunneled 
HTTPbis, and thus will operate without ALPN.

> 4) Ignore the failing test and just do nothing until someone from
> securetransport or gnutls adds support for the missing pieces. - I think
> this is not an option as well, mainly because:
>   - We should not have always failing tests because a feature is not
> implemented

I still totally disagree. And that statement is essentially rejecting the very 
premise of test-driven development. So I dare extrapolate that a lot of other 
people in the software industry disagree with you on this.

A test should fail if the implementation is not working as it is supposed to. 
It is irrelevant if the failure is caused by a regression, a latent bug, a 
nondeterministic implementation or an incomplete implementation or a missing 
implementation. In all cases, removing or disabling the test case amounts to 
shooting the messenger.

> - It blocks CI and mainly it blocks visibility of compilation
> and test execution. So no other developer can see if some change fails on
> Darwin-platforms coincidentally.

This is a red herring because:
1/ Several test cases are actually reportedly failing on Darwin debug builds, 
so this failure won´t make a meaningful difference.
2/ The test case is only a reflection of the behaviour that the stack relies 
on. Disabling the test case is not fixing the actual problem.

> Does anyone know another solution? Do you have any comments or ideas on how
> to proceed with this issue? PS: It would be great if we can stay on-topic
> only for these discussions.

Stating the bleedingly obvious here:
1/ Fix GnuTLS and revert to it.
2/ Switch to yet another TLS stack.

Rémi Denis-Courmont

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