convert server to mjs

cors/outlook.mjs

@@ -0,0 +1,46 @@
+// pass through api requests
+
+// http(s) modules
+import https from 'https';
+
+// url parsing
+import queryString from 'querystring';
+
+// return an express router
+const outlook = (req, res) => {
+	// add out-going headers
+	const headers = {};
+	headers['user-agent'] = '(WeatherStar 4000+, ws4000@netbymatt.com)';
+	headers.accept = req.headers.accept;
+
+	// get query paramaters if the exist
+	const queryParams = Object.keys(req.query).reduce((acc, key) => {
+		// skip the paramater 'u'
+		if (key === 'u') return acc;
+		// add the paramter to the resulting object
+		acc[key] = req.query[key];
+		return acc;
+	}, {});
+	let query = queryString.encode(queryParams);
+	if (query.length > 0) query = `?${query}`;
+
+	// get the page
+	https.get(`https://www.cpc.ncep.noaa.gov/${req.path}${query}`, {
+		headers,
+	}, (getRes) => {
+		// pull some info
+		const { statusCode } = getRes;
+		// pass the status code through
+		res.status(statusCode);
+
+		// set headers
+		res.header('content-type', getRes.headers['content-type']);
+		res.header('last-modified', getRes.headers['last-modified']);
+		// pipe to response
+		getRes.pipe(res);
+	}).on('error', (e) => {
+		console.error(e);
+	});
+};
+
+export default outlook;