class WEBrick::HTTPUtils::FormData

def <<(str)
  if @header
    super
  elsif str == CRLF
    @header = HTTPUtils::parse_header(@raw_header.join)
    if cd = self['content-disposition']
      if /\s+name="(.*?)"/ =~ cd then @name = $1 end
      if /\s+filename="(.*?)"/ =~ cd then @filename = $1 end
    end
  else
    @raw_header << str
  end
  self
end

def [](*key)
  begin
    @header[key[0].downcase].join(", ")
  rescue StandardError, NameError
    super
  end
end

def append_data(data)
  tmp = self
  while tmp
    unless tmp.next_data
      tmp.next_data = data
      break
    end
    tmp = tmp.next_data
  end
  self
end

def each_data
  tmp = self
  while tmp
    next_data = tmp.next_data
    yield(tmp)
    tmp = next_data
  end
end

def initialize(*args)
  @name = @filename = @next_data = nil
  if args.empty?
    @raw_header = []
    @header = nil
    super("")
  else
    @raw_header = EmptyRawHeader
    @header = EmptyHeader
    super(args.shift)
    unless args.empty?
      @next_data = self.class.new(*args)
    end
  end
end

def list
  ret = []
  each_data{|data|
    ret << data.to_s
  }
  ret
end

def to_s
  String.new(self)
end