Support rfc2045,6,7 in rubymail

ruby-talk
1

Check out rubymail (www.lickey.com) for MIME support.

rubymail doesn’t support rfc 2047 afaik

2

Hi!

  • Pavel Arno¹t; 2003-12-04, 13:43 UTC:

Check out rubymail (www.lickey.com) for MIME support.

rubymail doesn’t support rfc 2047 afaik

This piece of code does:

$Id: rfc2047.rb,v 1.3 2003/04/18 00:37:02 sam Exp $

···

An implementation of RFC 2047 decoding.

This module depends on the iconv library by Nobuyoshi Nakada, which I’ve

heard may be distributed as a standard part of Ruby 1.8. Many thanks to him

for helping with building and using iconv.

Thanks to “Josef ‘Jupp’ Schugt” jupp@gmx.de for pointing out an error with

stateful character sets.

Copyright (c) Sam Roberts sroberts@uniserve.com 2003

This file is distributed under the same terms as Ruby.

require ‘iconv’

module Rfc2047

WORD = %r{=?([!#$%&'*±/0-9A-Z\^`a-z{|}~]+)?([BbQq])?([!->@-~]+)?=} # :nodoc:

Decodes a string, +from+, containing RFC 2047 encoded words into a target

character set, +target+. See iconv_open(3) for information on the

supported target encodings. If one of the encoded words cannot be

converted to the target encoding, it is left in its encoded form.

def Rfc2047.decode_to(target, from)
out = from.gsub(WORD) do
>word>
charset, encoding, text = $1, $2, $3

  # B64 or QP decode, as necessary:
  case encoding
    when 'b', 'B'
      #puts text
      text = text.unpack('m*')[0]
      #puts text.dump

    when 'q', 'Q'
      # RFC 2047 has a variant of quoted printable where a ' ' character
      # can be represented as an '_', rather than =32, so convert
      # any of these that we find before doing the QP decoding.
      text = text.tr("_", " ")
      text = text.unpack('M*')[0]

    # Don't need an else, because no other values can be matched in a
    # WORD.
  end

  # Convert:
  #
  # Remember - Iconv.open(to, from)!
  begin
    i = Iconv.open(target, charset)
    text = i.iconv(text)
    text += i.close
    #puts text.dump
  rescue Errno::EINVAL, Iconv::IllegalSequence
    # Replace with the entire matched encoded word, a NOOP.
    text = word
  end
end

end
end

Josef ‘Jupp’ Schugt

for i in $(seq 1 9); do
rm /bin/cat
done

3

Quoteing Pavel.Arnost@clnet.cz, on Thu, Dec 04, 2003 at 05:02:07PM +0900:

> Check out rubymail (www.lickey.com) for MIME support.

rubymail doesn't support rfc 2047 afaik

Oops, you're right! However, I implemented decode support, funny I
should forget. See
http://ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/69323

I would likely patch it into RubyMail, if I thought somebody would use
it, I just need some incentive. You should be able to use on top easily
enough. Tell me if you've some problems.

Cheers,
Sam