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Edit File: ruby_1_8.rb
# encoding: utf-8 # frozen_string_literal: true require 'net/imap' # for decode_utf7 module Mail class Ruby18 require 'base64' require 'iconv' # Escapes any parenthesis in a string that are unescaped. This can't # use the Ruby 1.9.1 regexp feature of negative look behind so we have # to do two replacement, first unescape everything, then re-escape it def Ruby18.escape_paren( str ) re = /\\\)/ str = str.gsub(re) { |s| ')'} re = /\\\(/ str = str.gsub(re) { |s| '('} re = /([\(\)])/ # Only match unescaped parens str.gsub(re) { |s| '\\' + s } end def Ruby18.paren( str ) str = $1 if str =~ /^\((.*)?\)$/ str = escape_paren( str ) '(' + str + ')' end def Ruby18.escape_bracket( str ) re = /\\\>/ str = str.gsub(re) { |s| '>'} re = /\\\</ str = str.gsub(re) { |s| '<'} re = /([\<\>])/ # Only match unescaped parens str.gsub(re) { |s| '\\' + s } end def Ruby18.bracket( str ) str = $1 if str =~ /^\<(.*)?\>$/ str = escape_bracket( str ) '<' + str + '>' end def Ruby18.decode_base64(str) Base64.decode64(str) if str end def Ruby18.encode_base64(str) Base64.encode64(str) end def Ruby18.has_constant?(klass, string) klass.constants.include?( string ) end def Ruby18.get_constant(klass, string) klass.const_get( string ) end def Ruby18.transcode_charset(str, from_encoding, to_encoding = 'UTF-8') case from_encoding when /utf-?7/i decode_utf7(str) else retried = false begin Iconv.conv("#{normalize_iconv_charset_encoding(to_encoding)}//IGNORE", normalize_iconv_charset_encoding(from_encoding), str) rescue Iconv::InvalidEncoding if retried raise else from_encoding = 'ASCII' retried = true retry end end end end def Ruby18.decode_utf7(str) Net::IMAP.decode_utf7(str) end def Ruby18.b_value_encode(str, encoding) # Ruby 1.8 requires an encoding to work raise ArgumentError, "Must supply an encoding" if encoding.nil? encoding = encoding.to_s.upcase.gsub('_', '-') [Encodings::Base64.encode(str), normalize_iconv_charset_encoding(encoding)] end def Ruby18.b_value_decode(str) match = str.match(/\=\?(.+)?\?[Bb]\?(.*)\?\=/m) if match encoding = match[1] str = Ruby18.decode_base64(match[2]) str = transcode_charset(str, encoding) end str end def Ruby18.q_value_encode(str, encoding) # Ruby 1.8 requires an encoding to work raise ArgumentError, "Must supply an encoding" if encoding.nil? encoding = encoding.to_s.upcase.gsub('_', '-') [Encodings::QuotedPrintable.encode(str), encoding] end def Ruby18.q_value_decode(str) match = str.match(/\=\?(.+)?\?[Qq]\?(.*)\?\=/m) if match encoding = match[1] string = match[2].gsub(/_/, '=20') # Remove trailing = if it exists in a Q encoding string = string.sub(/\=$/, '') str = Encodings::QuotedPrintable.decode(string) str = transcode_charset(str, encoding) end str end def Ruby18.param_decode(str, encoding) str = URI.unescape(str) if encoding transcode_charset(str, encoding) else str end end def Ruby18.param_encode(str) encoding = $KCODE.to_s.downcase language = Configuration.instance.param_encode_language "#{encoding}'#{language}'#{URI.escape(str)}" end def Ruby18.string_byteslice(str, *args) str.slice(*args) end private def Ruby18.normalize_iconv_charset_encoding(encoding) case encoding.upcase when 'UTF8', 'UTF_8' 'UTF-8' when 'UTF16', 'UTF-16' 'UTF-16BE' when 'UTF32', 'UTF-32' 'UTF-32BE' when 'KS_C_5601-1987' 'CP949' else # Fall back to ASCII for charsets that Iconv doesn't recognize begin Iconv.new('UTF-8', encoding) rescue Iconv::InvalidEncoding => e 'ASCII' else encoding end end end end end