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import https from 'https';
import fs from 'node:fs';
import http from 'node:http';
import { fileURLToPath } from 'node:url';
import send from 'send';
import enableDestroy from 'server-destroy';
interface CreateServerOptions {
client: URL;
port: number;
host: string | undefined;
removeBase: (pathname: string) => string;
assets: string;
}
function parsePathname(pathname: string, host: string | undefined, port: number) {
try {
const urlPathname = new URL(pathname, `http://${host}:${port}`).pathname;
return decodeURI(encodeURI(urlPathname));
} catch (err) {
return undefined;
}
}
export function createServer(
{ client, port, host, removeBase, assets }: CreateServerOptions,
handler: http.RequestListener
) {
// The `base` is removed before passed to this function, so we don't
// need to check for it here.
const assetsPrefix = `/${assets}/`;
function isImmutableAsset(pathname: string) {
return pathname.startsWith(assetsPrefix);
}
const listener: http.RequestListener = (req, res) => {
if (req.url) {
let pathname: string | undefined = removeBase(req.url);
pathname = pathname[0] === '/' ? pathname : '/' + pathname;
const encodedURI = parsePathname(pathname, host, port);
if (!encodedURI) {
res.writeHead(400);
res.end('Bad request.');
return res;
}
const stream = send(req, encodedURI, {
root: fileURLToPath(client),
dotfiles: pathname.startsWith('/.well-known/') ? 'allow' : 'deny',
});
let forwardError = false;
stream.on('error', (err) => {
if (forwardError) {
console.error(err.toString());
res.writeHead(500);
res.end('Internal server error');
return;
}
// File not found, forward to the SSR handler
handler(req, res);
});
stream.on('headers', (_res: http.ServerResponse<http.IncomingMessage>) => {
if (isImmutableAsset(encodedURI)) {
// Taken from https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control#immutable
_res.setHeader('Cache-Control', 'public, max-age=31536000, immutable');
}
});
stream.on('directory', () => {
// On directory find, redirect to the trailing slash
let location: string;
if (req.url!.includes('?')) {
const [url = '', search] = req.url!.split('?');
location = `${url}/?${search}`;
} else {
location = req.url + '/';
}
res.statusCode = 301;
res.setHeader('Location', location);
res.end(location);
});
stream.on('file', () => {
forwardError = true;
});
stream.pipe(res);
} else {
handler(req, res);
}
};
let httpServer:
| http.Server<typeof http.IncomingMessage, typeof http.ServerResponse>
| https.Server<typeof http.IncomingMessage, typeof http.ServerResponse>;
if (process.env.SERVER_CERT_PATH && process.env.SERVER_KEY_PATH) {
httpServer = https.createServer(
{
key: fs.readFileSync(process.env.SERVER_KEY_PATH),
cert: fs.readFileSync(process.env.SERVER_CERT_PATH),
},
listener
);
} else {
httpServer = http.createServer(listener);
}
httpServer.listen(port, host);
enableDestroy(httpServer);
// Resolves once the server is closed
const closed = new Promise<void>((resolve, reject) => {
httpServer.addListener('close', resolve);
httpServer.addListener('error', reject);
});
return {
host,
port,
closed() {
return closed;
},
server: httpServer,
stop: async () => {
await new Promise((resolve, reject) => {
httpServer.destroy((err) => (err ? reject(err) : resolve(undefined)));
});
},
};
}
|
