fun tearDown() {
    ResponseCache.setDefault(null)
    if (this::cache.isInitialized) {
      cache.delete()
    }
  }

  /**
   * Test that response caching is consistent with the RI and the spec.
   * http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.4
   */
  @Test
  fun responseCachingByResponseCode() {
    // Test each documented HTTP/1.1 code, plus the first unused value in each range.

- Enviar un comentario de **"keep alive" `ping`** cada 15 segundos cuando no ha habido ningún mensaje, para evitar que algunos proxies cierren la conexión, como se sugiere en la [Especificación HTML: Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes).
- Configurar el header `Cache-Control: no-cache` para **evitar el almacenamiento en caché** del stream.

* Send a **"keep alive" `ping` comment** every 15 seconds when there hasn't been any message, to prevent some proxies from closing the connection, as suggested in the [HTML specification: Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes).
* Set the `Cache-Control: no-cache` header to **prevent caching** of the stream.

## 기술 세부사항 { #technical-details }

FastAPI는 일부 SSE 모범 사례를 기본으로 구현합니다.

- 메시지가 없을 때는 15초마다 **"keep alive" `ping` 주석**을 보내 일부 프록시가 연결을 종료하지 않도록 합니다. [HTML 사양: Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes)에서 권장합니다.
- 스트림이 **캐시되지 않도록** `Cache-Control: no-cache` 헤더를 설정합니다.
- Nginx 같은 일부 프록시에서 **버퍼링을 방지**하기 위해 특수 헤더 `X-Accel-Buffering: no`를 설정합니다.

## 技術細節 { #technical-details }

FastAPI 內建實作了一些 SSE 的最佳實務。

- 當 15 秒內沒有任何訊息時，傳送一次**「保活」`ping` 註解**，以避免某些代理伺服器關閉連線；此作法源自於[HTML 規範：Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes)中的建議。
- 設定 `Cache-Control: no-cache` 標頭，以**防止快取**串流內容。
- 設定特殊標頭 `X-Accel-Buffering: no`，以**避免**在像 Nginx 這類代理中被**緩衝**。

  rpm2cpio "devtoolset-9-gcc-9.3.1-2.2.el7.src.rpm" |cpio -idmv
  tar -xvf "gcc-9.3.1-20200408.tar.xz" --strip 1
  ;;
esac

# Apply the devtoolset patches to gcc.
/rpm-patch.sh "gcc.spec"

./contrib/download_prerequisites

mkdir -p "${TARGET}-build"
cd "${TARGET}-build"

"${TARGET}-src/configure" \
      --prefix=/"${TARGET}/usr" \
      --with-sysroot="/${TARGET}" \

		crypto.S3KMS.CreateMetadata(metadata, newKey.KeyID, newKey.Ciphertext, sealedKey, cryptoCtx)
		return nil
	case crypto.SSEC:
		sealedKey, err := crypto.SSEC.ParseMetadata(metadata)
		if err != nil {
			return err
		}

		var objectKey crypto.ObjectKey
		if err = objectKey.Unseal(oldKey, sealedKey, crypto.SSEC.String(), bucket, object); err != nil {
			if subtle.ConstantTimeCompare(oldKey, newKey) == 1 {

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.Provider;

import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import jcifs.CIFSUnsupportedCryptoException;

/**
 * Cryptographic utility class providing encryption and decryption functionality for jCIFS.

- Надсилати **коментар «keep alive» `ping`** кожні 15 секунд, коли не було жодного повідомлення, щоб запобігти закриттю з'єднання деякими проксі, як рекомендовано у [Специфікації HTML: Події, надіслані сервером](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes).
- Встановити заголовок `Cache-Control: no-cache`, щоб **запобігти кешуванню** потоку.

- The alpha feature `AnyVolumeDataSource` enables PersistentVolumeClaim objects to use the spec.dataSource field to reference a custom type as a data source ([#88636](https://github.com/kubernetes/kubernetes/pull/88636), [@bswartz](https://github.com/bswartz)) [SIG Apps and Storage]