DeleteMarker            bool // Is only set in DELETE operations for delete marker replication
	CheckDMReplicationReady bool // Is delete marker ready to be replicated - set only during HEAD
	Tagging                 bool // Is only in GET/HEAD operations to return tagging metadata along with regular metadata and body.

	UserDefined         map[string]string   // only set in case of POST/PUT operations

}

// Validates the preconditions. Returns true if GET/HEAD operation should not proceed.
// Preconditions supported are:
//
//	If-Modified-Since
//	If-Unmodified-Since
//	If-Match
//	If-None-Match
func checkPreconditions(ctx context.Context, w http.ResponseWriter, r *http.Request, objInfo ObjectInfo, opts ObjectOptions) bool {
	// Return false for methods other than GET and HEAD.

			Optional:    true,
		},
		config.HelpKV{
			Key:         Endpoint,
			Type:        "string",
			Description: "remote cache endpoint for GET/HEAD object(s) metadata, data" + defaultHelpPostfix(Endpoint),
			Optional:    true,
		},
		config.HelpKV{
			Key:         BlockSize,
			Type:        "string",

	}{
		{BucketCreated, "s3:BucketCreated:*"},
		{BucketRemoved, "s3:BucketRemoved:*"},
		{ObjectAccessedAll, "s3:ObjectAccessed:*"},
		{ObjectAccessedGet, "s3:ObjectAccessed:Get"},
		{ObjectAccessedHead, "s3:ObjectAccessed:Head"},
		{ObjectCreatedAll, "s3:ObjectCreated:*"},
		{ObjectCreatedCompleteMultipartUpload, "s3:ObjectCreated:CompleteMultipartUpload"},
		{ObjectCreatedCopy, "s3:ObjectCreated:Copy"},
		{ObjectCreatedPost, "s3:ObjectCreated:Post"},

			if size <= 0 || size > 100<<20 {
				return nil, ObjectInfo{}, errors.New("zip directory too large")
			}
		} else {
			return nil, ObjectInfo{}, err
		}
	}
}

// headObjectInArchiveFileHandler - HEAD Object in an archive file
func (api objectAPIHandlers) headObjectInArchiveFileHandler(ctx context.Context, objectAPI ObjectLayer, bucket, object string, w http.ResponseWriter, r *http.Request) {

	case ObjectAccessedGetRetention:
		return "s3:ObjectAccessed:GetRetention"
	case ObjectAccessedGetLegalHold:
		return "s3:ObjectAccessed:GetLegalHold"
	case ObjectAccessedHead:
		return "s3:ObjectAccessed:Head"
	case ObjectAccessedAttributes:
		return "s3:ObjectAccessed:Attributes"
	case ObjectCreatedAll:
		return "s3:ObjectCreated:*"
	case ObjectCreatedCompleteMultipartUpload:

	// Header indicates delete-marker replication status.
	MinIODeleteMarkerReplicationStatus = "X-Minio-Replication-DeleteMarker-Status"
	// Header indicates if its a GET/HEAD proxy request for active-active replication
	MinIOSourceProxyRequest = "X-Minio-Source-Proxy-Request"
	// Header indicates that this request is a replication request to create a REPLICA

		recV2 := httptest.NewRecorder()
		// construct HTTP request for Head Object endpoint.
		reqV2, err := newTestSignedRequestV2(http.MethodHead, getHeadObjectURL("", testCase.bucketName, testCase.objectName),
			0, nil, testCase.accessKey, testCase.secretKey, nil)
		if err != nil {
			t.Fatalf("Test %d: %s: Failed to create HTTP request for Head Object: <ERROR> %v", i+1, instanceType, err)
		}

	c.Assert(response.StatusCode, http.StatusNoContent)
}

// TestNonExistentBucket - Asserts response for HEAD on non-existent bucket.
func (s *TestSuiteCommon) TestNonExistentBucket(c *check) {
	// generate a random bucket name.
	bucketName := getRandomBucketName()
	// create request to HEAD on the bucket.
	// HEAD on an bucket helps validate the existence of the bucket.

			Description: "persist IAM assets externally to etcd",
		},
		config.HelpKV{
			Key:         config.CacheSubSys,
			Type:        "string",
			Description: "enable cache plugin on MinIO for GET/HEAD requests",
			Optional:    true,
		},
		config.HelpKV{
			Key:         config.BrowserSubSys,
			Description: "manage Browser HTTP specific features, such as Security headers, etc.",
			Optional:    true,
		},