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Groups > comp.lang.python > #71097

Re: Add "Received:" header to email msg in correct position?

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On 2014-05-07, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> On May 7, 2014 9:13 AM, "Chris Angelico" <rosuav@gmail.com> wrote:
>>
>> On Thu, May 8, 2014 at 1:06 AM, Burak Arslan <burak.arslan@arskom.com.tr>
> wrote:
>> > Seeing how discussion is still going on about this, I'd like to state
>> > once more what I said above in other words: You just need to do this:
>> >
>> > "Received: blah\r\n" + message.to_string()
>> >
>> > or better:
>> >
>> > socket.write("Received: blah\r\n")
>> > socket.write(message.to_string())
>> >
>> > And again, this is not a hack, this is how it's supposed to work.
>>
>> Yes, that method does work... if you're taking it in and sending it
>> right out again. But it means you have to hang onto two pieces of data
>> - the message and the new Received header - until you write it to a
>> file/socket.
>
> Alternatively, you could use a BytesIO to prepend the Received header to
> the raw data *before* you parse it with the email module.

That's probably what I ought to do. But subclassing Message and adding
a prepend_header was just too easy, and it avoids having to have my
app know anything about the format of an email message in general or a
header in particular.  For example, I don't know what characters (if
any) need to be escaped or specially encoded in the contents of a
header.  I also don't remember off the top of my head what you're
supposed to do with headers that get too long (I think you just stick
in a \r\n followed by some whitespace and then continue the header,
but I'd have to look that up and then test it).

I did know how to insert a tuple of two strings at the beginning of a
list.  :)

-- 
Grant Edwards               grant.b.edwards        Yow! All this time I've
                                  at               been VIEWING a RUSSIAN
                              gmail.com            MIDGET SODOMIZE a HOUSECAT!

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Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-05 19:51 +0000
  Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-05 13:01 -0700
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-05 20:58 +0000
      Re: Add "Received:" header to email msg in correct position? Tim Chase <python.list@tim.thechases.com> - 2014-05-05 16:09 -0500
        Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 02:13 +0000
          Re: Add "Received:" header to email msg in correct position? Steven D'Aprano <steve@pearwood.info> - 2014-05-06 08:22 +0000
            Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:12 +0000
      Re: Add "Received:" header to email msg in correct position? Terry Reedy <tjreedy@udel.edu> - 2014-05-06 14:16 -0400
      Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-07 10:13 +1000
  Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 09:15 +0000
    Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-06 19:47 +1000
      Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 10:26 +0000
        Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-06 20:41 +1000
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:15 +0000
      Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 14:19 +0000
      Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-07 00:26 +1000
      Re: Add "Received:" header to email msg in correct position? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 15:16 +0000
    Re: Add "Received:" header to email msg in correct position? Burak Arslan <burak.arslan@arskom.com.tr> - 2014-05-06 18:11 +0300
      Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-06 15:26 +0000
        Re: Add "Received:" header to email msg in correct position? Burak Arslan <burak.arslan@arskom.com.tr> - 2014-05-07 18:06 +0300
        Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-08 01:11 +1000
        Re: Add "Received:" header to email msg in correct position? Ian Kelly <ian.g.kelly@gmail.com> - 2014-05-07 16:29 -0600
          Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-08 13:28 +0000
            Re: Add "Received:" header to email msg in correct position? Chris Angelico <rosuav@gmail.com> - 2014-05-08 23:47 +1000
            Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-08 06:46 -0700
            Re: Add "Received:" header to email msg in correct position? Skip Montanaro <skip@pobox.com> - 2014-05-08 09:50 -0500
              Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-08 18:39 +0000
                Re: Add "Received:" header to email msg in correct position? Tim Chase <python.list@tim.thechases.com> - 2014-05-08 13:48 -0500
                Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-09 14:28 +0000
                Re: Add "Received:" header to email msg in correct position? Ethan Furman <ethan@stoneleaf.us> - 2014-05-08 17:00 -0700
  Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-07 08:58 +0200
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-07 14:32 +0000
      Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-08 09:44 +0200
  Re: Add "Received:" header to email msg in correct position? Emre Hasegeli <emre@hasegeli.com> - 2014-05-07 11:11 +0300
  Re: Add "Received:" header to email msg in correct position? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2014-05-07 10:57 +0200
    Re: Add "Received:" header to email msg in correct position? Grant Edwards <invalid@invalid.invalid> - 2014-05-07 14:33 +0000

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