keys = append(keys, k)
	}
	sort.Strings(keys)
	for _, key := range keys {
		values := httpResp.Header[key]
		for _, value := range values {
			echo.ResponseHeaderField.WriteKeyValueForRequest(outBuffer, requestID, key, value)
		}
	}

	// Write the lines of the body to the output buffer.
	for _, line := range strings.Split(string(data), "\n") {
		if line != "" {