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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 = sub_header("content-type", "charset")
case (content_transfer_encoding || "7bit").downcase
when "quoted-printable"
Unquoter.unquote_quoted_printable_and_convert_to(quoted_body,
to_charset, from_charset, true)
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|
header = part["content-type"]
if part.multipart?
part.body(to_charset, &attachment_presenter)
elsif header.nil?
""
elsif !attachment?(part)
part.unquoted_body(to_charset)
else
attachment_presenter.call(header["name"] || "(unnamed)")
end
}.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", preserve_underscores=false)
return "" if text.nil?
text.gsub(/(.*?)(?:(?:=\?(.*?)\?(.)\?(.*?)\?=)|$)/) do
before = $1
from_charset = $2
quoting_method = $3
text = $4
before = convert_to(before, to_charset, from_charset) if before.length > 0
before + case quoting_method
when "q", "Q" then
unquote_quoted_printable_and_convert_to(text, to_charset, from_charset, preserve_underscores)
when "b", "B" then
unquote_base64_and_convert_to(text, to_charset, from_charset)
when nil then
# will be nil at the end of the string, due to the nature of
# the regex used.
""
else
raise "unknown quoting method #{quoting_method.inspect}"
end
end
end
def unquote_quoted_printable_and_convert_to(text, to, from, preserve_underscores=false)
text = text.gsub(/_/, " ") unless preserve_underscores
text = text.gsub(/\r\n|\r/, "\n") # normalize newlines
convert_to(text.unpack("M*").first, to, from)
end
def unquote_base64_and_convert_to(text, to, from)
convert_to(Base64.decode(text), to, from)
end
begin
require 'iconv'
def convert_to(text, to, from)
return text unless to && from
text ? Iconv.iconv(to, from, text).first : ""
rescue Iconv::IllegalSequence, Iconv::InvalidEncoding, Errno::EINVAL
# the 'from' parameter specifies a charset other than what the text
# actually is...not much we can do in this case but just return the
# unconverted text.
#
# Ditto if either parameter represents an unknown charset, like
# X-UNKNOWN.
text
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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