[issue11783] email parseaddr and formataddr should be IDNA aware

[Torsten Becker]

Torsten Becker <torsten.becker at gmail.com> added the comment:

> OK, so when I went to apply this, I figured out that the patch isn't quite right.  I've redone the doc updates, and am attaching a version of the patch containing them.
>
> The issue is that the place that the IDNA decode support needs to be added isn't in parseaddr, it's in _parseaddr.py's AddresslistClass.  Tests are then needed to make sure that the IDNA decoding gets done both when parseaddr and getaddresslist are used.
>
> Do you want to tackle this, Torsten?

I would like to, but I probably will not get to it before Monday.  So
if anybody wants to work on this before that time, please feel free to
fix it properly. :)

Just two questions for the implementation:
  1. Would it be fine to move the helper _encode_decode_addr() into
_parseaddr.py and then import it in util.py, so it can be shared
between the two?
  2. Would line 232 in _parseaddr.py (AddrlistClass.getaddrlist) be a
good place to integrate it?

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<http://bugs.python.org/issue11783>
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