homespeakersServer/main.js

const outputApi = require("./outputs.js");

require('process').chdir(__dirname);

function notFound(res) {
	res.statusCode = 404;
	res.statusMessage = "Not Found";
	res.end(res.statusMessage);
}

function getMime(filename) {
	const suffix = (/(.*\.)[^.]+/).exec(filename),
		ext = filename.substr(suffix ? suffix[1].length : 0),
		mime = require("mime");
	if (!mime)
		return null;
	return mime.getType(ext);
}

function serveFile(url, res) {
	const filename = "./public/" +(url || "index.html").replace('/\//g', '');
	require("fs").readFile(filename, (err, data) => {
		if (err) {
			notFound(res);
		} else {
			const type = getMime(filename);
			if (type)
				res.setHeader("Content-Type", type);
			res.end(data);
		}
	});
}

function serveApi(method, url, res) {
	var urlParts = url.split('?', 2),
		args = (urlParts[1] || "").split('&'),
		argObj = {};
	url = urlParts[0];
	args.forEach(i => {
		var argSplited = i.split("=", 2);
		argObj[argSplited[0]] = argSplited[1] || true;
	});
	switch (url) {
		case "outputs":
			res.end(JSON.stringify(outputApi.listOutputs()));
			break;
		case "setState":
			if (argObj.output === undefined || argObj.input === undefined || argObj.state === undefined) {
				notFound(res);
			} else {
				outputApi.setOutputState(argObj.output, argObj.input, argObj.state == 1);
				res.end(JSON.stringify(outputApi.listOutputs()));
			}
			break;
		case "setVol":
			if (argObj.output === undefined || argObj.volume === undefined) {
				notFound(res);
			} else {
				outputApi.setOutputVolume(argObj.output, argObj.volume);
				//FIXME wait for completion
				res.end(JSON.stringify(outputApi.listOutputs()));
			}
			break;
		default:
			notFound(res);
			break;
	}
}

function onRequest(req, res) {
	const url = req.url.split("/").filter(i => i.length);
	if (req.method == "GET" && url[0] !== "api")
		serveFile(url[0], res);
	else if (url[0] === "api")
		serveApi(req.method, url.splice(1).join("/"), res);
	else
		notFound(res);
}

const srv = require('http').createServer(onRequest);

srv.on("clientError", (err, sock) => sock.end("HTTP/1.1 400 Bad Request\r\n\r\n"));
srv.listen(require('./config.js').HTTP_PORT);

require("./alsaOutput.js").init();
require("./remoteOutput.js").init();