Re: [Pyobjc-dev] Python talking to XPC services?

[Ronald O. <ron...@ma...>]

Op 31 dec. 2018 om 19:48 heeft Glyph <gl...@tw...> het volgende geschreven:

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>> On Dec 30, 2018, at 2:51 AM, Ronald Oussoren <ron...@ma...> wrote:
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>>> On 30 Dec 2018, at 07:19, Glyph <gl...@tw...> wrote:
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>>> I've long been curious about if and how one could use XPC services with Python, and I recently ran across this question:
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>>> https://stackoverflow.com/questions/52284089/is-it-possible-to-use-pyobjc-with-a-privilved-xpc-helper-tool-and-xpcinterface-a
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>>> If anyone on this list happens to have the relevant understanding, I put a 100-point bounty on it.
>>> 
>>> Happy holidays,
>> 
>> 
>> I hadn’t seen this question yet, mostly because I rarely visit stackoverflow.  A quick summary of my answer:
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>> 1) It is possible to call APIs with blocks, even if those APIs aren’t in Apple’s frameworks
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>> 2) It is possible to define ObjC protocols in Python
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>> 3) Those protocols don’t work with NSXPCInterface yet (issue #256), but there is an (untested) workaround
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>> I wonder how hard it will be to fix #256, with some luck NSXPCInterface access information that isn’t exposed through a public API.  In particular, the NSXPCInterface error mentions “extended method signature” and I haven’t found any reference to those yet in Apple documentation.
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> Thanks for having a look at this!  Good luck on figuring out what an "extended method signature" is, I hope that's tractable.
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> I don't know if it will be helpful for this purpose, but Ian Beer has a talk about macOS IPC mechanisms - from the perspective of exploiting them, rather than programming against them :) but perhaps some of the internal details he talks about will be useful to you:
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> https://vimeo.com/127859750
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> (Frankly a lot of this stuff goes over my head; I don't know a whole lot about Mach and the more I learn about ports the scarier they seem.)

Thanks for the link.  I hope I don’t need any of the real low-level stuff, but just enough to make the XPC support classes happy. 

I’m currently focusing on what will result in a rewrite, and more importantly, major cleanup  of py2app and supporting libraries.  Low-level objc stuff will have to wait a bit, writing nice clean python 3 code is much more fun :-)

And: my best wishes for the 2019. 

Ronald

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> -g
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