if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Check for auth type to return S3 compatible error.
	cred, _, s3Error := checkRequestAuthTypeCredential(ctx, r, policy.GetObjectAction)
	if s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	logger.GetReqInfo(ctx).BucketName = bucketName
	logger.GetReqInfo(ctx).ObjectName = objectName

	_, _, s3Err = checkRequestAuthTypeCredential(ctx, r, action)
	return s3Err
}

// checkRequestAuthTypeWithVID is similar to checkRequestAuthType
// passes versionID additionally.

	if objectAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	listBuckets := objectAPI.ListBuckets

	cred, owner, s3Error := checkRequestAuthTypeCredential(ctx, r, policy.ListAllMyBucketsAction)
	if s3Error != ErrNone && s3Error != ErrAccessDenied {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}