pipic/server.js

var fs = require("fs");
var http = require("http");
var crypto = require("crypto");
var pathlib = require("path");
var urllib = require("url");

var Slideshow = require("./js/slideshow");
var error = require("./js/error");

var conf = JSON.parse(fs.readFileSync("conf.json"));
var index = fs.readFileSync("index.html", "utf-8")
	.replace(/<<transition_time>>/g, conf.transition_time);

var slideshow = Slideshow(conf.slides, conf.interval);

function onexit(code) {
	console.log("exiting", code);
	slideshow.sendEvent("reload");
	process.exit();
}
process.on("exit", onexit);
process.on("SIGINT", onexit);
process.on("SIGTERM", onexit);

process.on("uncaughtException", onexit);

function handler(req, res) {
	var parts = urllib.parse(req.url);

	// /: Send the base site to the client
	if (parts.pathname === "/") {
		res.end(index);

	// /polyfills.js: JavaScript polyfills
	} else if (parts.pathname === "polyfills.js") {
		fs.createReadStream("polyfills.js")
			.pipe(res)
			.on("error", err => error(err, res));

	// /init: send initial information about current slide
	} else if (parts.pathname === "/init") {
		res.end(slideshow.getSlideName());

	// /await: long polling, request won't end before a new slide comes
	} else if (parts.pathname === "/await") {
		slideshow.pushAwaiter(res);

	// /slide: serve the current slide's html
	} else if (parts.pathname === "/slide") {
		slideshow.serveCurrentSlide(parts, res);

	// Serve other files
	} else {
		var served = false;

		for (var slide of slideshow.getSlides()) {

			// If client requests /{slide-name}/*
			if (slide.name === parts.pathname.substr(1, slide.name.length)) {
				slide.serveFiles(parts, res);
				served = true;
				break;
			}
		}

		if (!served) {
			res.writeHead(404);
			res.end("404");
		}
	}
}

var server = http.createServer(handler);
server.on("error", err => {
	console.error(err);
	system.exit(1);
});
server.listen(conf.port);
console.log("Server running on port "+conf.port+".");