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## from: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/101949
# $Id: rfc2047.rb,v 1.4 2003/04/18 20:55:56 sam Exp $
# MODIFIED slightly by William Morgan
#
# 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> 2004
#
# This file is distributed under the same terms as Ruby.
require 'iconv'
module Rfc2047
WORD = %r{=\?([!\#$%&'*+-/0-9A-Z\\^\`a-z{|}~]+)\?([BbQq])\?([!->@-~]+)\?=} # :nodoc: 'stupid ruby-mode
WORDSEQ = %r{(#{WORD.source})\s+(?=#{WORD.source})}
def Rfc2047.is_encoded? s; s =~ WORD end
# 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)
from = from.gsub(WORDSEQ, '\1')
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
Iconv.easy_decode(target, charset, text)
end
end
end
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8 entries across 8 versions & 1 rubygems