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require 'base64'
module TMail
class Mail
def subject(to_charset = 'utf-8')
Unquoter.unquote_and_convert_to(quoted_subject, to_charset)
end
def unquoted_body(to_charset = 'utf-8')
from_charset = header['content-type']['charset'] rescue 'us-ascii'
case (content_transfer_encoding || "7bit").downcase
when "quoted-printable"
Unquoter.unquote_quoted_printable_and_convert_to(quoted_body,
to_charset, from_charset)
when "base64"
Unquoter.unquote_base64_and_convert_to(quoted_body, to_charset,
from_charset)
when "7bit", "8bit"
Unquoter.convert_to(quoted_body, to_charset, from_charset)
when "binary"
quoted_body
else
quoted_body
end
end
def body(to_charset = 'utf-8', &block)
attachment_presenter = block || Proc.new { |file_name| "Attachment: #{file_name}\n" }
if multipart?
parts.collect { |part|
part.header["content-type"].main_type == "text" ?
part.unquoted_body(to_charset) :
attachment_presenter.call(part.header["content-type"].params["name"])
}.join
else
unquoted_body(to_charset)
end
end
end
class Unquoter
class << self
def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1")
return "" if text.nil?
if text =~ /^=\?(.*?)\?(.)\?(.*)\?=$/
from_charset = $1
quoting_method = $2
text = $3
case quoting_method.upcase
when "Q" then
unquote_quoted_printable_and_convert_to(text, to_charset, from_charset)
when "B" then
unquote_base64_and_convert_to(text, to_charset, from_charset)
else
raise "unknown quoting method #{quoting_method.inspect}"
end
else
convert_to(text, to_charset, from_charset)
end
end
def unquote_quoted_printable_and_convert_to(text, to, from)
convert_to(text.gsub(/_/," ").unpack("M*").first, to, from)
end
def unquote_base64_and_convert_to(text, to, from)
convert_to(Base64.decode64(text), to, from)
end
begin
require 'iconv'
def convert_to(text, to, from)
text ? Iconv.iconv(to, from || "ISO-8859-1", text).first : ""
end
rescue LoadError
# Not providing quoting support
def convert_to(text, to, from)
warn "Action Mailer: iconv not loaded; ignoring conversion from #{from} to #{to} (#{__FILE__}:#{__LINE__})"
text
end
end
end
end
end
if __FILE__ == $0
require 'test/unit'
class TC_Unquoter < Test::Unit::TestCase
def test_unquote_quoted_printable
a ="=?ISO-8859-1?Q?[166417]_Bekr=E6ftelse_fra_Rejsefeber?="
b = TMail::Unquoter.unquote_and_convert_to(a, 'utf-8')
assert_equal "[166417] Bekr\303\246ftelse fra Rejsefeber", b
end
def test_unquote_base64
a ="=?ISO-8859-1?B?WzE2NjQxN10gQmVrcuZmdGVsc2UgZnJhIFJlanNlZmViZXI=?="
b = TMail::Unquoter.unquote_and_convert_to(a, 'utf-8')
assert_equal "[166417] Bekr\303\246ftelse fra Rejsefeber", b
end
def test_unquote_without_charset
a ="[166417]_Bekr=E6ftelse_fra_Rejsefeber"
b = TMail::Unquoter.unquote_and_convert_to(a, 'utf-8')
assert_equal "[166417]_Bekr=E6ftelse_fra_Rejsefeber", b
end
end
end
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