health.mjs

Functions

Imports

It imports no other module of this repo. No module of this repo imports it.

Source

1/**
2 * The /health response for uptime monitors and the Capsid console: 200 when the database answers `ping`, 503 when it
3 * throws. Unauthenticated, so the body carries only up or down, the backup's status (a stale dump is a warning inside
4 * it, never a 503: the site is still up) and the time. Never cached, never indexed.
5 *
6 * @param {{ ping: () => Promise<unknown>, backup: () => Promise<unknown>, now?: Date }} probe
7 * @returns {Promise<Response>}
8 */
9export async function healthResponse({ ping, backup, now = new Date() }) {
10  let up = false;
11  try {
12    await ping();
13    up = true;
14  } catch (err) {
15    console.error(JSON.stringify({ event: "health_db_down", error: String(err) }));
16  }
17  const body = { ok: up, db: up ? "up" : "down", backup: await backup(), time: now.toISOString() };
18  return new Response(JSON.stringify(body), {
19    status: up ? 200 : 503,
20    headers: { "Content-Type": "application/json; charset=utf-8", "Cache-Control": "no-store", "X-Robots-Tag": "noindex" },
21  });
22}