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method

set_conditional_cache_control!

Importance_0
set_conditional_cache_control!() private

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# File actionpack/lib/action_dispatch/http/cache.rb, line 98
        def set_conditional_cache_control!
          return if self[CACHE_CONTROL].present?

          control = @cache_control

          if control.empty?
            headers[CACHE_CONTROL] = DEFAULT_CACHE_CONTROL
          elsif control[:no_cache]
            headers[CACHE_CONTROL] = NO_CACHE
          else
            extras  = control[:extras]
            max_age = control[:max_age]

            options = []
            options << "max-age=#{max_age.to_i}" if max_age
            options << (control[:public] ? PUBLIC : PRIVATE)
            options << MUST_REVALIDATE if control[:must_revalidate]
            options.concat(extras) if extras

            headers[CACHE_CONTROL] = options.join(", ")
          end
        end
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