// Stalling the socket will cause TWO requests to time out!
    server.enqueue(MockResponse(socketPolicy = StallSocketAtStart))

    // The 3rd request should be sent to a fresh connection.
    server.enqueue(
      MockResponse(body = "fresh connection"),
    )

    // The first call times out.
    val call1 = client.newCall(Request(server.url("/")))
    assertFailsWith<IOException> {
      call1.execute()

     * @param host an IP address or hostname.
     * @param port the IP port associated with the service.
     * @param maxAge time in seconds that this alternative is considered fresh.
     */
    fun alternateService(
      streamId: Int,
      origin: String,
      protocol: ByteString,
      host: String,
      port: Int,
      maxAge: Long,
    )
  }

By the time I started creating **FastAPI** itself, most of the pieces were already in place, the design was defined, the requirements and tools were ready, and the knowledge about the standards and specifications was clear and fresh.

## Future

By this point, it's already clear that **FastAPI** with its ideas is being useful for many people.

It is being chosen over previous alternatives for suiting many use cases better.

  // - `resourceVersionMatch` = NotOlderThan
  //   is interpreted as "data at least as new as the provided `resourceVersion`"
  //   and the bookmark event is send when the state is synced
  //   to a `resourceVersion` at least as fresh as the one provided by the ListOptions.
  //   If `resourceVersion` is unset, this is interpreted as "consistent read" and the
  //   bookmark event is send when the state is synced at least to the moment

## Changelog since v1.13.1

### Other notable changes

* client-go: shortens refresh period for token files to 1 minute to ensure auto-rotated projected service account tokens are read frequently enough. ([#72437](https://github.com/kubernetes/kubernetes/pull/72437), [@liggitt](https://github.com/liggitt))

  - Add support for Apache CloudStack
  
  ### AWS
  - Regenerate list of EC2 instances
  - Fix pricing endpoint in AWS China Region
  
  ### Azure
  - Add optional jitter on initial VMSS VM cache refresh, keep the refreshes spread over time
  - Serve from cache for the whole period of ongoing throttling
  - Fix unwanted VMSS VMs cache invalidation
  - Enforce setting the number of retries if cloud provider backoff is enabled

- Masks ceph RBD adminSecrets in logs when logLevel >= 4 ([#95245](https://github.com/kubernetes/kubernetes/pull/95245), [@sfowl](https://github.com/sfowl)) [SIG Storage]
- Vsphere: improve logging message on node cache refresh event ([#95236](https://github.com/kubernetes/kubernetes/pull/95236), [@andrewsykim](https://github.com/andrewsykim)) [SIG Cloud Provider]

## Dependencies

### Added
_Nothing has changed._

### Changed

- Fixed an issue blocking azure auth to prompt to device code authentication flow when refresh token expires. ([#102063](https://github.com/kubernetes/kubernetes/pull/102063), [@tdihp](https://github.com/tdihp))

在高级使用场景中，如果不想使用「缓存」值，而是为需要在同一请求的每一步操作（多次）中都实际调用依赖项，可以把 `Depends` 的参数 `use_cache` 的值设置为 `False` :

```Python hl_lines="1"
async def needy_dependency(fresh_value: str = Depends(get_value, use_cache=False)):
    return {"fresh_value": fresh_value}
```

## 小结

千万别被本章里这些花里胡哨的词藻吓倒了，其实**依赖注入**系统非常简单。

依赖注入无非是与*路径操作函数*一样的函数罢了。

但它依然非常强大，能够声明任意嵌套深度的「图」或树状的依赖结构。

!!! tip "提示"

        .onlyIfCached()
        .noTransform()
        .immutable()
        .build()
    assertThat(cacheControl.toString()).isEqualTo(
      "no-cache, no-store, max-age=1, max-stale=2, min-fresh=3, only-if-cached, " +
        "no-transform, immutable",
    )
    assertThat(cacheControl.noCache).isTrue()
    assertThat(cacheControl.noStore).isTrue()
    assertThat(cacheControl.maxAgeSeconds).isEqualTo(1)