// send another list request with the token received with the 410 error, the server will respond with
  // a list starting from the next key, but from the latest snapshot, which is inconsistent from the
  // previous list results - objects that are created, modified, or deleted after the first list request
  // will be included in the response, as long as their keys are after the "next key".

<img src="https://fastapi.tiangolo.com/img/tutorial/bigger-applications/image01.png">

## 多次使用不同的 `prefix` 包含同一个路由器

你也可以在*同一*路由器上使用不同的前缀来多次使用 `.include_router()`。

在有些场景这可能有用，例如以不同的前缀公开同一个的 API，比方说 `/api/v1` 和 `/api/latest`。

这是一个你可能并不真正需要的高级用法，但万一你有需要了就能够用上。

## 在另一个 `APIRouter` 中包含一个 `APIRouter`

与在 `FastAPI` 应用程序中包含 `APIRouter` 的方式相同，你也可以在另一个 `APIRouter` 中包含 `APIRouter`，通过：

```Python

  // The results of type checking for each expression.
  // Presence of this field indicates the completion of the type checking.
  // +optional
  optional TypeChecking typeChecking = 2;

  // The conditions represent the latest available observations of a policy's current state.
  // +optional
  // +listType=map
  // +listMapKey=type
  repeated k8s.io.apimachinery.pkg.apis.meta.v1.Condition conditions = 3;
}

		return h.healBucket(objAPI, h.bucket, false)
	}

	buckets, err := objAPI.ListBuckets(h.ctx, BucketOptions{})
	if err != nil {
		return errFnHealFromAPIErr(h.ctx, err)
	}

	// Heal latest buckets first.
	sort.Slice(buckets, func(i, j int) bool {
		return buckets[i].Created.After(buckets[j].Created)
	})

	for _, bucket := range buckets {

	return err
}

// hasContentMD5 returns true if Content-MD5 header is set.
func hasContentMD5(h http.Header) bool {
	_, ok := h[xhttp.ContentMD5]
	return ok
}

// http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html
const (
	// Maximum object size per PUT request is 5TB.
	// This is a divergence from S3 limit on purpose to support
	// use cases where users are going to upload large files

		{ObjectOpts{Name: "c1test"}, cfgs[0], true},                   // 2. valid ObjectOpts passing empty Filter
		{ObjectOpts{Name: "c1test", VersionID: "vid"}, cfgs[0], true}, // 3. valid ObjectOpts passing empty Filter

		}
		return
	}
	defer gr.Close()

	objInfo := gr.ObjInfo

	// make sure we have the latest metadata for metrics calculation
	rinfo.PrevReplicationStatus = objInfo.TargetReplicationStatus(tgt.ARN)

	// use latest ObjectInfo to check if previous replication attempt succeeded

		return nil, err
	}
	return &req, nil
}

// validate a RestoreObjectRequest as per AWS S3 spec https://docs.aws.amazon.com/AmazonS3/latest/API/API_RestoreObject.html
func (r *RestoreObjectRequest) validate(ctx context.Context, objAPI ObjectLayer) error {
	if r.Type != SelectRestoreRequest && !r.SelectParameters.IsEmpty() {

   *
   * @since 20.0
   */
  public static final String X_FORWARDED_HOST = "X-Forwarded-Host";

  /**
   * The HTTP <a
   * href="https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/x-forwarded-headers.html#x-forwarded-port">{@code
   * X-Forwarded-Port}</a> header field name.
   *
   * @since 20.0
   */
  public static final String X_FORWARDED_PORT = "X-Forwarded-Port";

	ObjVersions   versionsHistogram `msg:"vh"`
	AllTierStats  *allTierStats     `msg:"ats,omitempty"`
	Compacted     bool              `msg:"c"`
}

// dataUsageCache contains a cache of data usage entries latest version.
type dataUsageCache struct {
	Info  dataUsageCacheInfo
	Cache map[string]dataUsageEntry
}