* the network, such as when the response is fully cached. The body of the returned response
   * should not be read.
   */
  @get:JvmName("networkResponse") val networkResponse: Response?,
  /**
   * Returns the raw response received from the cache. Will be null if this response didn't use
   * the cache. For conditional get requests the cache response and network response may both be

    executeSynchronously("/", "Cache-Control", "only-if-cached")
      .assertCode(504)
      .assertBody("")
      .assertNoNetworkResponse()
      .assertNoCacheResponse()
  }

  @Test
  fun networkDropsOnConditionalGet() {
    client =
      client.newBuilder()
        .cache(cache)
        .build()

    // Seed the cache.
    server.enqueue(
      MockResponse(

Some requests will have a cached response. When this cached response isn’t fresh, OkHttp can do a _conditional GET_ to download an updated response if it’s newer than what’s cached. This requires headers like `If-Modified-Since` and `If-None-Match` to be added.

## Rewriting Responses

    cache = buildCache("/cache/".toPath(), Int.MAX_VALUE.toLong(), loggingFileSystem)
    client =
      clientTestRule.newClientBuilder()
        .cache(cache)
        .cookieJar(JavaNetCookieJar(cookieManager))
        .build()
  }

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

  @Test

import okio.Source
import okio.Timeout
import okio.buffer

/** Serves requests from the cache and writes responses to the cache. */
class CacheInterceptor(internal val cache: Cache?) : Interceptor {
  @Throws(IOException::class)
  override fun intercept(chain: Interceptor.Chain): Response {
    val call = chain.call()
    val cacheCandidate = cache?.get(chain.request().requestForCache())

    val now = System.currentTimeMillis()

          .url(url)
          .post(true)
          .build(),
      )
    runBatch(badProviders, names)
    println("cached first run\n****************\n")
    names = listOf("google.com", "graph.facebook.com")
    bootstrapClient =
      bootstrapClient.newBuilder()
        .cache(dnsCache)
        .build()
    dnsProviders =
      providers(
        client = bootstrapClient,
        http2Only = true,

 - ConnectionReleased
 - CallEnd
 
## Cache directory

The cache directory must be exclusively owned by a single instance.

Deleting the cache when it is no longer needed can be done.  However this may delete the purpose of the cache
which is designed to persist between app restarts.

```kotlin
cache.delete()
```
 
## Pruning the Cache

Pruning the entire Cache to clear space temporarily can be done using evictAll.

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.cache2

import assertk.assertThat
import assertk.assertions.isEqualTo
import java.io.File
import java.io.RandomAccessFile
import java.util.Random
import kotlin.test.assertFailsWith
import okio.Buffer

 * handshakes.
 */
class Handshake internal constructor(
  /**
   * Returns the TLS version used for this connection. This value wasn't tracked prior to OkHttp
   * 3.0. For responses cached by preceding versions this returns [TlsVersion.SSL_3_0].
   */
  @get:JvmName("tlsVersion") val tlsVersion: TlsVersion,
  /** Returns the cipher suite used for the connection. */

 * Fix: Persist proper `Content-Encoding` header to cache for GZip responses.
 * Fix: Eliminate rare race condition in SPDY streams that would prevent connection reuse.
 * Fix: Change HTTP date formats to UTC to conform to RFC2616 section 3.3.
 * Fix: Support SPDY header blocks with trailing bytes.
 * Fix: Allow `;` as separator for `Cache-Control` header.