return ErrExpiredPresignRequest
	}

	encodedResource, err = getResource(encodedResource, r.Host, globalDomainNames)
	if err != nil {
		return ErrInvalidRequest
	}

	expectedSignature := preSignatureV2(cred, r.Method, encodedResource, strings.Join(filteredQueries, "&"), r.Header, expires)
	if !compareSignatureV2(gotSignature, expectedSignature) {
		return ErrSignatureDoesNotMatch
	}

	r.Form.Del(xhttp.Expires)