canonicalHeaders += "\n"
	}

	date := expires // Date is set to expires date for presign operations.
	if date == "" {
		// If expires date is empty then request header Date is used.
		date = headers.Get(xhttp.Date)
	}

	// From the Amazon docs:
	//
	// StringToSign = HTTP-Verb + "\n" +
	// 	 Content-Md5 + "\n" +
	//	 Content-Type + "\n" +
	//	 Date/Expires + "\n" +
	//	 CanonicalizedProtocolHeaders +

			},
			region:   region,
			expected: ErrUnsignedHeaders,
		},
		// (4) Should give an expired request if it has expired.
		{
			queryParams: map[string]string{
				"X-Amz-Algorithm":      signV4Algorithm,
				"X-Amz-Date":           now.AddDate(0, 0, -2).Format(iso8601Format),
				"X-Amz-Expires":        "60",
				"X-Amz-Signature":      "badsignature",

	Inlined bool

	DataBlocks   int
	ParityBlocks int
}

// ExpiresStr returns a stringified version of Expires header in http.TimeFormat
func (o ObjectInfo) ExpiresStr() string {
	var expires string
	if !o.Expires.IsZero() {
		expires = o.Expires.UTC().Format(http.TimeFormat)
	}
	return expires
}

// ArchiveInfo returns any saved zip archive meta information.
// It will be decrypted if needed.

		ongoing: false,
		expiry:  expiry.UTC(),
	}
}

// String returns x-amz-restore compatible representation of r.
func (r restoreObjStatus) String() string {
	if r.Ongoing() {
		return `ongoing-request="true"`
	}
	return fmt.Sprintf(`ongoing-request="false", expiry-date="%s"`, r.expiry.Format(http.TimeFormat))
}

// Expiry returns expiry of restored object and true if restore-object has completed.

			}
			for k, v := range cleanReservedKeys(object.UserDefined) {
				content.UserMetadata.Set(k, v)
			}

			content.UserMetadata.Set("expires", object.Expires.Format(http.TimeFormat))
			content.Internal = &ObjectInternalInfo{
				K: object.DataBlocks,
				M: object.ParityBlocks,
			}
		}
		content.Owner = owner
		content.VersionID = object.VersionID

	}

	defer globalCacheConfig.Set(&cache.ObjectInfo{
		Key:          objInfo.Name,
		Bucket:       objInfo.Bucket,
		ETag:         objInfo.ETag,
		ModTime:      objInfo.ModTime,
		Expires:      objInfo.ExpiresStr(),
		CacheControl: objInfo.CacheControl,
		Size:         asize,
		Metadata:     cleanReservedKeys(objInfo.UserDefined),
	})

		NumVersions:      fi.NumVersions,
		SuccessorModTime: fi.SuccessorModTime,
		CacheControl:     fi.Metadata["cache-control"],
	}

	if exp, ok := fi.Metadata["expires"]; ok {
		if t, err := amztime.ParseHeader(exp); err == nil {
			objInfo.Expires = t.UTC()
		}
	}

	// Extract etag from metadata.
	objInfo.ETag = extractETag(fi.Metadata)

	// Add user tags to the object info

	"github.com/minio/pkg/v2/wildcard"
	"github.com/minio/pkg/v2/workers"
	"gopkg.in/yaml.v3"
)

// expire: # Expire objects that match a condition
//   apiVersion: v1
//   bucket: mybucket # Bucket where this batch job will expire matching objects from
//   prefix: myprefix # (Optional) Prefix under which this job will expire objects matching the rules below.
//   rules:
//     - type: object  # regular objects with zero or more older versions

var supportedHeaders = []string{
	"content-type",
	"cache-control",
	"content-language",
	"content-encoding",
	"content-disposition",
	"x-amz-storage-class",
	xhttp.AmzStorageClass,
	xhttp.AmzObjectTagging,
	"expires",
	xhttp.AmzBucketReplicationStatus,
	"X-Minio-Replication-Server-Side-Encryption-Sealed-Key",
	"X-Minio-Replication-Server-Side-Encryption-Seal-Algorithm",
	"X-Minio-Replication-Server-Side-Encryption-Iv",

	// Remove STANDARD StorageClass
	metadata = removeStandardStorageClass(metadata)
	// Clean meta etag keys 'md5Sum', 'etag', "expires", "x-amz-tagging".
	return cleanMetadataKeys(metadata, "md5Sum", "etag", "expires", xhttp.AmzObjectTagging, "last-modified", VersionPurgeStatusKey)
}

// Filter X-Amz-Storage-Class field only if it is set to STANDARD.