}

	clientETag, err := etag.FromContentMD5(r.Header)
	if err != nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidDigest), r.URL)
		return
	}

	// if Content-Length is unknown/missing, throw away
	size := r.ContentLength

	rAuthType := getRequestAuthType(r)
	// For auth type streaming signature, we need to gather a different content length.
	switch rAuthType {

	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Verify if region is valid.
	region = signV4Values.Credential.scope.region

	// Extract date, if not present throw error.
	var dateStr string
	if dateStr = req.Header.Get("x-amz-date"); dateStr == "" {
		if dateStr = r.Header.Get("Date"); dateStr == "" {
			return cred, "", "", time.Time{}, ErrMissingDateHeader
		}
	}

		}
	case config.CallhomeSubSys:
		cfg, err := callhome.LookupConfig(s[config.CallhomeSubSys][config.Default])
		if err != nil {
			return err
		}
		// callhome cannot be enabled if license is not registered yet, throw an error.
		if cfg.Enabled() && !globalSubnetConfig.Registered() {
			return errors.New("Deployment is not registered with SUBNET. Please register the deployment via 'mc license register ALIAS'")
		}
	case config.DriveSubSys:

	if errCode != ErrNone {
		return errCode
	}

	cred, _, s3Err := checkKeyValid(r, signV4Values.Credential.accessKey)
	if s3Err != ErrNone {
		return s3Err
	}

	// Extract date, if not present throw error.
	var date string
	if date = req.Header.Get(xhttp.AmzDate); date == "" {
		if date = r.Header.Get(xhttp.Date); date == "" {
			return ErrMissingDateHeader
		}
	}

	// Parse date header.

	var wg sync.WaitGroup
	wg.Add(len(s.sets))
	for _, s := range s.sets {
		go func(s *erasureObjects) {
			defer wg.Done()
			// This is a force delete, no reason to throw errors.
			s.DeleteObject(ctx, bucket, prefix, ObjectOptions{DeletePrefix: true})
		}(s)
	}
	wg.Wait()
	return nil
}

// DeleteObject - deletes an object from the hashedSet based on the object name.