Embed binary files into Node SEA by reading them into the snapshot

sea-config.json

{
    "main": "server-with-assets.js",
    "output": "sea-prep.blob",
    "useSnapshot": true,
    "codeCache": true
}

server-with-assets.js

function main(assets) {
    const http = require("http");

    const requestListener = function(req, res) {
        let asset = assets[req.url];
        if (asset != null) {
            res.end(asset);
        } else {
            res.statusCode = 404;
            res.end("Not Found");
        }
    };

    const server = http.createServer(requestListener);
    const [host, port] = ['localhost', 8000];
    server.listen(port, host, () => {
        console.log(`Server is running on http://${host}:${port}`);
    });
}

const fs = require('node:fs');
const assets = {
    '/binary.dat': fs.readFileSync('binary.dat'),
};

const v8 = require('node:v8');
if (v8.startupSnapshot.isBuildingSnapshot()) {
    v8.startupSnapshot.setDeserializeMainFunction(main, assets);
} else {
    main(assets);
}