read_entry

# File activesupport/lib/active_support/cache/file_store.rb, line 77
        def read_entry(key, options)
          file_name = key_file_path(key)
          if File.exist?(file_name)
            entry = File.open(file_name) { |f| Marshal.load(f) }
            if entry && !entry.expired? && !entry.expires_in && !self.options[:expires_in]
              # Check for deprecated use of +:expires_in+ option from versions < 3.0
              deprecated_expires_in = options[:expires_in]
              if deprecated_expires_in
                ActiveSupport::Deprecation.warn('Setting :expires_in on read has been deprecated in favor of setting it on write.', caller)
                if entry.created_at + deprecated_expires_in.to_f <= Time.now.to_f
                  delete_entry(key, options)
                  entry = nil
                end
              end
            end
            entry
          end
        rescue
          nil
        end