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server.js
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server.js
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import "dotenv/config";
import crypto from "crypto";
import { createRequestHandler } from "@remix-run/express";
import compression from "compression";
import express from "express";
import helmet from "helmet";
import morgan from "morgan";
import sourceMapSupport from "source-map-support";
import getPort, { portNumbers } from "get-port";
import chalk from "chalk";
import closeWithGrace from "close-with-grace";
import { printUrls } from "./server-utils.js";
const MODE = process.env.NODE_ENV ?? "development";
const DISALLOW_INDEXING = process.env.DISALLOW_INDEXING === "true";
sourceMapSupport.install();
if (MODE === "production" && process.env.SENTRY_DSN) {
import("./server-monitoring.js").then(({ init }) => init());
}
const viteDevServer =
MODE === "production"
? undefined
: await import("vite").then((vite) =>
vite.createServer({
server: { middlewareMode: true },
}),
);
const app = express();
app.use(compression());
// http://expressjs.com/en/advanced/best-practice-security.html#at-a-minimum-disable-x-powered-by-header
app.disable("x-powered-by");
app.use(morgan("tiny"));
app.use((_, res, next) => {
res.locals.cspNonce = crypto.randomBytes(16).toString("hex");
next();
});
app.use(
helmet({
referrerPolicy: { policy: "same-origin" },
crossOriginEmbedderPolicy: false,
contentSecurityPolicy: {
directives: {
"connect-src": [
MODE === "development" ? "ws:" : null,
process.env.SENTRY_DSN ? "*.sentry.io" : null,
"'self'",
].filter(Boolean),
"font-src": ["'self'"],
"frame-src": ["'self'"],
"img-src": [
"'self'",
"data:",
"avatars.githubusercontent.com",
"cdn.discordapp.com",
"res.cloudinary.com",
],
"form-action": ["'self'", "github.com/login/oauth/authorize"],
"script-src": [
"'strict-dynamic'",
"'self'",
(_, res) => `'nonce-${res.locals.cspNonce}'`,
"'unsafe-inline'", // backward compatibility for 'nonces'
"https:", // backward compatibility for 'strict-dynamic'
"'unsafe-eval'", // mdx-bundler needs this
],
"script-src-attr": [(_, res) => `'nonce-${res.locals.cspNonce}'`],
"upgrade-insecure-requests": null,
},
},
}),
);
if (DISALLOW_INDEXING) {
app.use((_, res, next) => {
res.set("X-Robots-Tag", "noindex, nofollow");
next();
});
}
// handle asset requests
if (viteDevServer) {
app.use(viteDevServer.middlewares);
} else {
app.use(
"/assets",
express.static("build/client/assets", {
immutable: true,
maxAge: "1y",
}),
);
}
app.use(express.static("build/client", { maxAge: "1h" }));
function getBuild() {
return viteDevServer
? viteDevServer.ssrLoadModule("virtual:remix/server-build")
: import("./build/server/index.js");
}
// handle SSR requests
app.all(
"*",
createRequestHandler({
getLoadContext: (_, res) => ({
cspNonce: res.locals.cspNonce,
serverBuild: getBuild(),
}),
build: getBuild,
}),
);
const desiredPort = Number(process.env.PORT || 3000);
const portToUse = await getPort({
port: portNumbers(desiredPort, desiredPort + 100),
});
const server = app.listen(portToUse, async () => {
const addr = server.address();
const portUsed = typeof addr === "object" ? addr.port : addr;
if (portUsed !== desiredPort) {
console.warn(
chalk.yellow(
`⚠️ Port ${desiredPort} is not available, using ${portUsed} instead.`,
),
);
}
console.log(`🚀 App started`);
printUrls(portUsed);
console.log(chalk.bold("Press Ctrl+C to stop"));
});
closeWithGrace(async ({ err }) => {
if (err) {
console.error(chalk.red(err));
console.error(chalk.red(err.stack));
process.exit(1);
}
await new Promise((resolve, reject) => {
server.close((e) => (e ? reject(e) : resolve("ok")));
});
});