Re: Encoding woes

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Francesco Ariis writes:

> Hello,
>     I have finished setting up my ~/.mailfilter. Almost everything
> functions well.
> One thing that gives me troubles is possibly related to message
> encoding.
>
>
> There are some GitHub push messages that I do want to see, like
>
>     @Xyz Pushed 3 commits
>
> Hence I wrote this:
>
>     if ( /^@[a-zA-Z0-9_-]+ pushed [0-9]+ commits?.$/:bD )
>         to $MAILFOLDER/spam
>
> (notice the =E2=80=98$=E2=80=99 at the end.)
>
> Now, *some* messages are caught by this filter, some not. I inspected
> two of them with vim
>
>     ----=3D=3D_mimepart_xyz
>     Content-Type: text/plain;
>      charset=3DUTF-8
>     Content-Transfer-Encoding: 7bit
>
>      @someone pushed 5 commits.
>
>     ----=3D=3D_mimepart_qwz
>     Content-Type: text/plain;
>      charset=3DUTF-8
>     Content-Transfer-Encoding: quoted-printable
>
>      @else pushed 6 commits.=3D0D
>
> The message which does not trigger the pattern has an additional =E2=80=
=9C=3D0D=E2=80=9D
> at the end.
>
> I know that I could just remove the =E2=80=98$=E2=80=99 from my regexp =
to make it work
> on both messages, but I wonder whether there is a more principled solut=
ion,
> if I should report this to my MRA (getmail) or what else.

getmail is not involved here. This is how the mail was sent. It's strange =
to =20
observe variation in formats of automated github spam. Maybe they're doin=
g =20
A/B testing, and either the A, or the B, is sending broken mail.

>     if ( /^@[a-zA-Z0-9_-]+ pushed [0-9]+ commits?.$/:bD )

The period actually matches any character. This is a Perl RE. Try:

>     if ( /^@[a-zA-Z0-9_-]+ pushed [0-9]+ commits?\.\r?$/:bD )

to match a real period, and an optional CR, which is what that encodes. =20
maildrop should be able to decode it, and apply the regexp.


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