[Mailman-i18n] Re: Add header/footer to MIME multipart

[Martin Ramsch]

Barry A. Warsaw <barry@python.org> wrote:

> | Another option for MIME multipart messages is to embed the
> | message parts into a _new_ multipart/mixed structure which
> | contains
> | 1st the header as text/plain, then
> | 2nd all parts of the message itself, then
> | 3rd the footer as text/plain.
[...]
> My main reservation about doing this is about the best way to craft
> this new outer multipart/mixed message.  In all the other cases, we're
> basically keeping the outer chrome intact, e.g. the headers from the
> originally sent message are basically passed through.

The same is possible here!

You keep _all_ of the original header lines, just changing the
MIME header lines, basically
    Content-Type
and Content-Length

Example, imagine you'd have this mail:

   Recieved: blablabla 1
   Recieved: blablabla 2
   ...many more headers...
   MIME-Version: 1.0
   Content-Type: text/plain; charset="iso-8859-15"
   Content-Transfer-Encoding: quoted-printable

   Some text about the Euro =A4


To add header and footer text as seperate MIME parts, you _just_
change the Content-Type header here (and delete or update
Content-Length header, if present):

   Recieved: blablabla 1
   Recieved: blablabla 2
   ...many more headers...
   MIME-Version: 1.0
   Content-Type: multipart/mixed; boundary="choosesomethingunique"

   Put some explanatory text here for non-MIME-conformant mail clients.

   --choosesomethingunique
   Content-Type: text/plain; charset="iso-8859-1"
   Content-Transfer-Encoding: 8bit

   Here goes the header text, with some schöne Umlauts, if you like

   --choosesomethingunique
   Content-Type: text/plain; charset="iso-8859-15"
   Content-Transfer-Encoding: quoted-printable

   Some text about the Euro =A4

   --choosesomethingunique
   Content-Type: text/plain; charset="iso-8859-1"
   Content-Transfer-Encoding: 8bit

   Here goes the footer text

   --choosesomethingunique--


So it's pretty simple:  just move the MIME header lines down into
its new seperate part, leave all other header lines alone!


Not too difficult :-)

Regards,
  Martin

PS: I just had a beer (or was it two, or four?) so fergive me
    any writing mitakes :)