module Rack::Mime

def match?(value, matcher)
  v1, v2 = value.split('/', 2)
  m1, m2 = matcher.split('/', 2)
  (m1 == '*' || v1 == m1) && (m2.nil? || m2 == '*' || m2 == v2)
end

def mime_type(ext, fallback = 'application/octet-stream')
  MIME_TYPES.fetch(ext.to_s.downcase, fallback)
end