@httpland/nel-middleware/esm/utils.js

HTTP network error logging(NEL) middleware

// Copyright 2023-latest the httpland authors. All rights reserved. MIT license.
// This module is browser compatible.
import { isNonNegativeInteger, isNumber, isUnitInterval } from "./deps.js";
/** Assert the {@link NELPolicy} is valid.
 * @throws {Error} If the policy include invalid field.
 */
export function assertValidNELPolicy(policy) {
    const { max_age, success_fraction, failure_fraction } = policy;
    assertNonNegativeInteger(max_age, `max_age must be non-negative integer. ${max_age}`);
    isNumber(success_fraction) &&
        assertUnitInterval(success_fraction, `success_fraction must be unit interval. ${success_fraction}`);
    isNumber(failure_fraction) &&
        assertUnitInterval(failure_fraction, `failure_fraction must be unit interval. ${failure_fraction}`);
}
/** Assert the input is non-negative integer. */
export function assertNonNegativeInteger(input, msg) {
    if (!isNonNegativeInteger(input))
        throw Error(msg);
}
/** Assert the input is unit interval. */
export function assertUnitInterval(input, msg) {
    if (!isUnitInterval(input))
        throw Error(msg);
}