# File actionpack/lib/action_dispatch/http/cache.rb, line 44
def initialize(*)
  status, header, body = super

  @cache_control = {}
  @etag = self["ETag"]

  if cache_control = self["Cache-Control"]
    cache_control.split(/,\s*/).each do |segment|
      first, last = segment.split("=")
      last ||= true
      @cache_control[first.to_sym] = last
    end
  end
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 73
def etag
  @etag
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 81
def etag=(etag)
  key = ActiveSupport::Cache.expand_cache_key(etag)
  @etag = self["ETag"] = %("#{Digest::MD5.hexdigest(key)}")
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 77
def etag?
  @etag
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 59
def last_modified
  if last = headers['Last-Modified']
    Time.httpdate(last)
  end
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 69
def last_modified=(utc_time)
  headers['Last-Modified'] = utc_time.httpdate
end

  # File actionpack/lib/action_dispatch/http/cache.rb, line 65
def last_modified?
  headers.include?('Last-Modified')
end