timeout elapses. If we get bytes but there's nobody asking for them, we buffer them. We don't consider bytes as delivered for flow control until they're consumed by the application.

Consider an application streaming a video over http/2. Perhaps the user pauses the video and the application stops reading bytes from this stream. The buffer will fill up, and flow control prevents the server from sending more data on this stream. When the user unpauses her video the buffer drains, the read is acknowledged,...

  }

fun Request.Builder.commonCacheControl(cacheControl: CacheControl): Request.Builder {
  val value = cacheControl.toString()
  return when {
    value.isEmpty() -> removeHeader("Cache-Control")
    else -> header("Cache-Control", value)
  }
}

fun Request.Builder.commonGet(): Request.Builder = method("GET", null)

fun Request.Builder.commonHead(): Request.Builder = method("HEAD", null)

 * limitations under the License.
 */
package okhttp3.internal.concurrent

/**
 * A unit of work that can be executed one or more times.
 *
 * Recurrence
 * ----------
 *
 * Tasks control their recurrence schedule. The [runOnce] function returns -1L to signify that the
 * task should not be executed again. Otherwise it returns a delay until the next execution.
 *

        HTTP_PROXY_AUTH -> "Proxy-Authenticate"
        else -> return emptyList()
      },
    )
  }

  /**
   * Returns the cache control directives for this response. This is never null, even if this
   * response contains no `Cache-Control` header.
   */
  @get:JvmName("cacheControl")
  val cacheControl: CacheControl
    get() = commonCacheControl

  @JvmName("-deprecated_cacheControl")

     * Content-Length: 100
     * Cache-Control: max-age=600
     * ```
     *
     * A typical HTTPS file looks like this:
     *
     * ```
     * https://google.com/foo
     * GET
     * 2
     * Accept-Language: fr-CA
     * Accept-Charset: UTF-8
     * HTTP/1.1 200 OK
     * 3
     * Content-Type: image/png
     * Content-Length: 100
     * Cache-Control: max-age=600
     *

    assertEquals(setOf(OkHttpTest::class.java.name), testHandler.calls.keys)
  }

  fun testCachedRequest() {
    enableTls()

    server.enqueue(MockResponse(body = "abc", headers = Headers.headersOf("cache-control", "public, max-age=3")))
    server.enqueue(MockResponse(body = "abc"))

    val ctxt = InstrumentationRegistry.getInstrumentation().targetContext.applicationContext

    val cacheSize = 1L * 1024 * 1024 // 1MB

  }

  @Test
  fun cacheHit() {
    server.enqueue(
      MockResponse(
        headers =
          headersOf(
            "ETag",
            "v1",
            "Cache-Control",
            "max-age=60",
            "Vary",
            "Accept-Charset",
          ),
        body = "A",
      ),
    )
    client =
      client.newBuilder()

  }

  companion object {
    /**
     * Cache control request directives that require network validation of responses. Note that such
     * requests may be assisted by the cache via conditional GET requests.
     */
    @JvmField
    val FORCE_NETWORK = commonForceNetwork()

    /**
     * Cache control request directives that uses the cache only, even if the cached response is

    open fun headers(headers: Headers) = commonHeaders(headers)

    /**
     * Sets this request's `Cache-Control` header, replacing any cache control headers already
     * present. If [cacheControl] doesn't define any directives, this clears this request's
     * cache-control headers.
     */
    open fun cacheControl(cacheControl: CacheControl): Builder = commonCacheControl(cacheControl)

    bytesIn.writeByte(0x58) // == Literal indexed ==
    // Indexed name (idx = 24) -> cache-control
    bytesIn.writeByte(0x08) // Literal value (len = 8)
    bytesIn.writeUtf8("no-cache")
  }

  private fun checkReadSecondRequestWithoutHuffman() {
    assertThat(hpackReader!!.headerCount).isEqualTo(2)

    // [  1] (s =  53) cache-control: no-cache
    var entry = hpackReader!!.dynamicTable[readerHeaderTableLength() - 2]!!