# File lib/soap/streamHandler.rb, line 43
  def self.parse_media_type(str)
    if /^#{ MediaType }(?:\s*;\s*charset=([^"]+|"[^"]+"))?$/i !~ str
      return nil
    end
    charset = $1
    charset.gsub!(/"/, '') if charset
    charset || 'us-ascii'
  end