"x-minio-internal-tier-free-versionID": "OWZlZjk5N2QtMjMzZi00N2U3LTlkZmMtNWYxNzc3NzdlZTM2"
    },
    "MetaUsr": {
      "X-Amz-Replication-Status": "COMPLETED",
      "content-type": "application/octet-stream",
      "etag": "8315e643ed6a5d7c9962fc0a8ef9c11f"
    },
...
```

### Metadata for object replication - on target

```
...
  "MetaSys": {
      "x-minio-internal-inline-data": "dHJ1ZQ==",

		parts []CompletePart
	}{
		// inputParts - 0.
		// Case for replicating ETag mismatch.
		{
			[]CompletePart{
				{ETag: "abcd", PartNumber: 1},
			},
		},
		// inputParts - 1.
		// should error out with part too small.
		{
			[]CompletePart{
				{ETag: "e2fc714c4727ee9395f324cd2e7f331f", PartNumber: 1},
				{ETag: "1f7690ebdd9b4caf8fab49ca1757bf27", PartNumber: 2},
			},
		},

				MetaUsr   struct {
					Etag string `json:"etag"`
				}
			}
		}
		var ei erasureInfo
		var idx int
		if err := json.Unmarshal(meta, &ei); err == nil && ei.V2Obj != nil {
			if m.objSize == 0 {
				m.objSize = ei.V2Obj.Size
			}
			m.data = ei.V2Obj.EcM
			m.parity = ei.V2Obj.EcN
			if len(ei.V2Obj.PartNums) == 1 && !strings.ContainsRune(ei.V2Obj.MetaUsr.Etag, '-') {
				m.wantMD5 = ei.V2Obj.MetaUsr.Etag

		Name:                       oi.Name,
		Size:                       oi.Size,
		ActualSize:                 asz,
		Bucket:                     oi.Bucket,
		VersionID:                  oi.VersionID,
		ETag:                       oi.ETag,
		ModTime:                    oi.ModTime,
		ReplicationStatus:          oi.ReplicationStatus,
		ReplicationStatusInternal:  oi.ReplicationStatusInternal,
		DeleteMarker:               oi.DeleteMarker,

    postBodyRetransmittedOnFailureRecovery()
  }

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

type PartTooBig struct{}

func (e PartTooBig) Error() string {
	return "Part size bigger than the allowed limit"
}

// InvalidETag error returned when the etag has changed on disk
type InvalidETag struct{}

func (e InvalidETag) Error() string {
	return "etag of the object has changed"
}

// BackendDown is returned for network errors
type BackendDown struct {
	Err string
}

Les tests :

## Extraits de code { #code-snippets }

//// tab | Test

    enableCache()
    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("ETag: v1")
        .body("abc")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .code(HttpURLConnection.HTTP_OK)
        .addHeader("ETag: v2")
        .body("abd")
        .build(),
    )
    var call =
      client.newCallWithListener(

   *
   * @since 28.2
   */
  public static final String CROSS_ORIGIN_OPENER_POLICY = "Cross-Origin-Opener-Policy";

  /** The HTTP {@code ETag} header field name. */
  public static final String ETAG = "ETag";

  /** The HTTP {@code Expires} header field name. */
  public static final String EXPIRES = "Expires";

  /** The HTTP {@code Last-Modified} header field name. */

* `filename` - Ayarlanırsa response içindeki `Content-Disposition`’a dahil edilir.

File response'ları uygun `Content-Length`, `Last-Modified` ve `ETag` header’larını içerir.

{* ../../docs_src/custom_response/tutorial009_py310.py hl[2,10] *}

`response_class` parametresini de kullanabilirsiniz:

{* ../../docs_src/custom_response/tutorial009b_py310.py hl[2,8,10] *}