106 lines
3.2 KiB
TypeScript
106 lines
3.2 KiB
TypeScript
import path from "path";
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import express from "express";
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import compression from "compression";
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import morgan from "morgan";
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import { createRequestHandler } from "@remix-run/express";
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const app = express();
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app.use((req, res, next) => {
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// helpful headers:
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res.set("x-fly-region", process.env.FLY_REGION ?? "unknown");
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res.set("Strict-Transport-Security", `max-age=${60 * 60 * 24 * 365 * 100}`);
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// /clean-urls/ -> /clean-urls
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if (req.path.endsWith("/") && req.path.length > 1) {
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const query = req.url.slice(req.path.length);
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const safepath = req.path.slice(0, -1).replace(/\/+/g, "/");
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res.redirect(301, safepath + query);
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return;
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}
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next();
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});
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// if we're not in the primary region, then we need to make sure all
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// non-GET/HEAD/OPTIONS requests hit the primary region rather than read-only
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// Postgres DBs.
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// learn more: https://fly.io/docs/getting-started/multi-region-databases/#replay-the-request
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app.all("*", function getReplayResponse(req, res, next) {
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const { method, path: pathname } = req;
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const { PRIMARY_REGION, FLY_REGION } = process.env;
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const isMethodReplayable = !["GET", "OPTIONS", "HEAD"].includes(method);
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const isReadOnlyRegion =
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FLY_REGION && PRIMARY_REGION && FLY_REGION !== PRIMARY_REGION;
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const shouldReplay = isMethodReplayable && isReadOnlyRegion;
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if (!shouldReplay) return next();
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const logInfo = {
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pathname,
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method,
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PRIMARY_REGION,
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FLY_REGION,
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};
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console.info(`Replaying:`, logInfo);
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res.set("fly-replay", `region=${PRIMARY_REGION}`);
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return res.sendStatus(409);
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});
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app.use(compression());
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// http://expressjs.com/en/advanced/best-practice-security.html#at-a-minimum-disable-x-powered-by-header
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app.disable("x-powered-by");
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// Remix fingerprints its assets so we can cache forever.
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app.use(
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"/build",
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express.static("public/build", { immutable: true, maxAge: "1y" })
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);
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// Everything else (like favicon.ico) is cached for an hour. You may want to be
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// more aggressive with this caching.
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app.use(express.static("public", { maxAge: "1h" }));
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app.use(morgan("tiny"));
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const MODE = process.env.NODE_ENV;
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const BUILD_DIR = path.join(process.cwd(), "build");
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app.all(
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"*",
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MODE === "production"
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? createRequestHandler({ build: require(BUILD_DIR) })
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: (...args) => {
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purgeRequireCache();
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const requestHandler = createRequestHandler({
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build: require(BUILD_DIR),
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mode: MODE,
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});
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return requestHandler(...args);
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}
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);
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const port = process.env.PORT || 3000;
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app.listen(port, () => {
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// require the built app so we're ready when the first request comes in
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require(BUILD_DIR);
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console.log(`✅ app ready: http://localhost:${port}`);
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});
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function purgeRequireCache() {
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// purge require cache on requests for "server side HMR" this won't const
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// you have in-memory objects between requests in development,
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// alternatively you can set up nodemon/pm2-dev to restart the server on
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// file changes, we prefer the DX of this though, so we've included it
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// for you by default
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for (const key in require.cache) {
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if (key.startsWith(BUILD_DIR)) {
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// eslint-disable-next-line @typescript-eslint/no-dynamic-delete
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delete require.cache[key];
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}
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}
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}
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