@thi.ng/server/interceptors/cache-control.js

Minimal HTTP server with declarative routing, static file serving and freely extensible via pre/post interceptors

import { kebab } from "@thi.ng/strings";
const cacheControl = (opts = {}) => {
  const acc = [];
  for (const [k, v] of Object.entries(opts)) {
    switch (k) {
      case "maxAge":
        acc.push("max-age=" + v);
        break;
      case "sMaxAge":
        acc.push("s-maxage=" + v);
        break;
      default:
        if (v) acc.push(kebab(k));
    }
  }
  const value = acc.join(", ");
  return {
    pre: (ctx) => (value && ctx.res.setHeader("cache-control", value), true)
  };
};
export {
  cacheControl
};