# File lib/webrick/httputils.rb, line 109
    def mime_type(filename, mime_tab)
      suffix1 = (/\.(\w+)$/ =~ filename && $1.downcase)
      suffix2 = (/\.(\w+)\.[\w\-]+$/ =~ filename && $1.downcase)
      mime_tab[suffix1] || mime_tab[suffix2] || "application/octet-stream"
    end