return
	}

	// Set prefix value for "s3:prefix" policy conditionals.
	r.Header.Set("prefix", "")

	// Set delimiter value for "s3:delimiter" policy conditionals.
	r.Header.Set("delimiter", SlashSeparator)

	// Check if we are asked to return prefix usage
	enablePrefixUsage := r.Form.Get("prefix-usage") == "true"