astroboy/plugins/astroboy-security/app/middlewares/astroboy-security-hsts.js

Astroboy（阿童木）is a Nodejs SFB(Separation of Front and Back ends) framework, built on koa2.

"use strict";
/**
 * Strict-Transport-Security
 * https://developer.mozilla.org/zh-CN/docs/Security/HTTP_Strict_Transport_Security
 */
const assert = require("assert");
const factory = function (options, app) {
    if (typeof options === 'number') {
        options = {
            maxAge: options,
        };
    }
    options = options || {};
    assert(typeof options.maxAge === 'number', 'options.maxAge should be a number');
    let value = 'max-age=' + options.maxAge;
    if (options.includeSubDomains) {
        value += '; includeSubDomains';
    }
    if (options.preload) {
        value += '; preload';
    }
    return function hsts(ctx, next) {
        ctx.set('Strict-Transport-Security', value);
        return next();
    };
};
module.exports = factory;
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