* without prior notice.
 *
 */
public interface ExtensionRealmCache {
    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    /**
     * CacheRecord
     */
    class CacheRecord {

        private final ClassRealm realm;

        private final ExtensionDescriptor descriptor;

	VersionID             string `xml:"VersionId,omitempty"`
	// MTime of DeleteMarker on source that needs to be propagated to replica
	DeleteMarkerMTime DeleteMarkerMTime `xml:"-"`
	// MinIO extensions to support delete marker replication
	ReplicationState ReplicationState `xml:"-"`

	found bool // the object was found during deletion
}

// DeleteMarkerMTime is an embedded type containing time.Time for XML marshal

	AmzFwdHeaderChecksumSha1       = "x-amz-fwd-header-x-amz-checksum-sha1"
	AmzFwdHeaderChecksumSha256     = "x-amz-fwd-header-x-amz-checksum-sha256"
	AmzFwdHeaderDeleteMarker       = "x-amz-fwd-header-x-amz-delete-marker"
	AmzFwdHeaderETag               = "x-amz-fwd-header-ETag"
	AmzFwdHeaderExpires            = "x-amz-fwd-header-Expires"
	AmzFwdHeaderExpiration         = "x-amz-fwd-header-x-amz-expiration"

	if d.targetsMap == nil {
		d.targetsMap = make(map[string]replicateTargetDecision)
	}
	d.targetsMap[t.Arn] = t
}

// PendingStatus returns a stringified representation of internal replication status with all targets marked as `PENDING`
func (d ReplicateDecision) PendingStatus() string {
	b := new(bytes.Buffer)
	for _, k := range d.targetsMap {
		if k.Replicate {
			fmt.Fprintf(b, "%s=%s;", k.Arn, replication.Pending.String())
		}

Die gleichen Prozesse, die für Pfad-Parameter gelten, werden auch auf Query-Parameter angewendet:

* Editor Unterstützung (natürlich)
* Daten-<abbr title="Konvertieren des Strings, der von einem HTTP-Request kommt, in Python-Daten">„Parsen“</abbr>
* Datenvalidierung
* Automatische Dokumentation

## Defaultwerte { #defaults }

Da Query-Parameter kein fester Teil eines Pfades sind, können sie optional sein und Defaultwerte haben.

		vID, err := uuid.Parse(fi.TierFreeVersionID())
		if err != nil {
			panic(fmt.Errorf("Invalid Tier Object delete marker versionId %s %v", fi.TierFreeVersionID(), err))
		}
		freeEntry := xlMetaV2Version{Type: DeleteType, WrittenByVersion: globalVersionUnix}
		freeEntry.DeleteMarker = &xlMetaV2DeleteMarker{
			VersionID: vID,

	return dsc
}

// replicate deletes to the designated replication target if replication configuration
// has delete marker replication or delete replication (MinIO extension to allow deletes where version id
// is specified) enabled.
// Similar to bucket replication for PUT operation, soft delete (a.k.a setting delete marker) and
// permanent deletes (by specifying a version ID in the delete operation) have three states "Pending", "Complete"

	labels := []string{"GetObject", "PutObject", "CopyObject", "CompleteMultipartUpload"}
	ttfbHist := prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Name:    "s3_ttfb_seconds",
			Help:    "Time taken by requests served by current MinIO server instance",
			Buckets: histBuckets,
		},
		[]string{"api"},
	)
	observations := []struct {
		val   float64
		label string
	}{
		{
			val:   0.02,

	// and don't process the If-Modified-Since header.
	if objInfo.ModTime.IsZero() || objInfo.ModTime.Equal(time.Unix(0, 0)) {
		return false
	}

	// If top level is a delete marker proceed to upload.
	if objInfo.DeleteMarker {
		return false
	}

	// Headers to be set of object content is not going to be written to the client.
	writeHeaders := func() {
		// set common headers

Lassen Sie uns das vorherige Beispiel noch einmal anschauen:

{* ../../docs_src/response_status_code/tutorial001_py39.py hl[6] *}

`201` ist der Statuscode für „Created“ („Erzeugt“).

Aber Sie müssen sich nicht merken, was jeder dieser Codes bedeutet.

Sie können die Annehmlichkeit von Variablen aus `fastapi.status` nutzen.

{* ../../docs_src/response_status_code/tutorial002_py39.py hl[1,6] *}