# File lib/mail/fields/common/parameter_hash.rb, line 15 def [](key_name) key_pattern = Regexp.escape(key_name.to_s) pairs = [] exact = nil each do |k,v| if k =~ /^#{key_pattern}(\*|$)/i if $1 == '*' pairs << [k, v] else exact = k end end end if pairs.empty? # Just dealing with a single value pair super(exact || key_name) else # Dealing with a multiple value pair or a single encoded value pair string = pairs.sort { |a,b| a.first.to_s <=> b.first.to_s }.map { |v| v.last }.join('') if mt = string.match(/([\w\-]+)'(\w\w)'(.*)/) string = mt[3] encoding = mt[1] else encoding = nil end Mail::Encodings.param_decode(string, encoding) end end