# File lib/tmail/quoting.rb, line 139 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
# File lib/tmail/quoting.rb, line 104 def convert_to_with_fallback_on_iso_8859_1(text, to, from) return text if to == 'utf-8' and text.isutf8 if from.blank? and !text.is_binary_data? from = CharDet.detect(text)['encoding'] # Chardet ususally detects iso-8859-2 (aka windows-1250), but the text is # iso-8859-1 (aka windows-1252 and Latin1). http://en.wikipedia.org/wiki/ISO/IEC_8859-2 # This can cause unwanted characters, like ŕ instead of à. # (I know, could be a very bad decision...) from = 'iso-8859-1' if from =~ /iso-8859-2/ end begin convert_to_without_fallback_on_iso_8859_1(text, to, from) rescue Iconv::InvalidCharacter unless from == 'iso-8859-1' from = 'iso-8859-1' retry end end end
# File lib/tmail/quoting.rb, line 79 def unquote_and_convert_to(text, to_charset, from_charset = "iso-8859-1", preserve_underscores=false) return "" if text.nil? text.gsub!(/\?=(\s*)=\?/, '?==?') # Remove whitespaces between 'encoded-word's 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
# File lib/tmail/quoting.rb, line 133 def unquote_base64_and_convert_to(text, to, from) convert_to(Base64.decode(text), to, from) end
# File lib/tmail/quoting.rb, line 127 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
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