Demo of importing non-UTF-8 JSON with the ESM module loader

json_encoding_server.js

// Mixed-encoding JSON example server
//
// Instructions:
//
// 1. Run node json_encoding_server.mjs
// 2. Visit http://localhost:8080/home.html
// 3. Browse the console errors

import http from "http";

const PORT = 8080;

const server = http.createServer((req, res) => {
	if (req.url === "/home.js") {
		res.writeHead(200, { "Content-Type": "text/javascript" });
		res.write(`
			import utf8json from "./utf8" with { type: "json" };
			import latin1json from "./latin1" with { type: "json" };
			import utf16lejson from "./utf16le" with { type: "json" };
			console.log(utf8json);
			console.log(latin1json);
			console.log(utf16lejson);
		`);
		res.end();
		return;
	}
	if (req.url === "/home.html") {
		res.writeHead(200, { "Content-Type": "text/html" });
		res.write(`
			<script type="module" src="./home.js"></script>
		`);
		res.end();
		return;
	}
	if (req.url === "/favicon.ico") {
		res.writeHead(404);
		res.end();
		return;
	}
	let encoding = req.url.substr(1);
	console.log("Encoding:", encoding);
	try {
		res.writeHead(200, { "Content-Type": `text/json; encoding=${encoding}` });
		let message = "Héllo 🌐";
		if (encoding.indexOf("utf") === -1) {
			// Non-Unicode encodings don't support emoji
			message = "Héllo <emoji>";
		}
		res.write(`{"message":"${message}"}\n`, encoding);
	} catch(e) {
		console.log(e);
	} finally {
		res.end();
	}
});

server.listen(PORT, "localhost", () => {
	console.log(`Server running at http://localhost:${PORT}/`);
});