mort
/
xremoteview


			
				
					
						
						
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							let http = require("http");
let net = require("net");

let tcpport = process.env["TCPPORT"] ? parseInt(process.env["TCPPORT"]) : 8099;
let httpport = process.env["HTTPPORT"] ? parseInt(process.env["HTTPPORT"]) : 8098;

let html = `
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>XRemoteView</title>
</head>
<body>
	<img id="image" src="/image" style="object-fit: contain; height: 100vh; width: 100%;">
	<script>
let img = document.getElementById("image");
let url = img.src;

function refresh() {
	img.onload = wait;
	img.onerror = () => {
		console.error("Load error");
		setTimeout(refresh, 4000);
	};

	let rand = Math.floor(Math.random() * 1000000);
	img.src = url + "?" + rand;
}

function wait() {
	fetch("/wait").then(refresh).catch(err => {
		console.error("Wait error:", err);
		wait();
	});
}

wait();
	</script>
</body>
</html>
`;

let imgdata = Buffer.alloc(0);
let waiters = [];

net.createServer(conn => {
	console.log("Connection", conn.remoteAddress);

	received = Buffer.alloc(0);
	let hasLength = false;
	let expectedLen = 0;
	conn.on("data", data => {
		received = Buffer.concat([received, data]);

		while (true) {
			if (!hasLength && received.length >= 4) {
				expectedLen = received.readUInt32BE(0);
				received = received.slice(4);
				hasLength = true;
			}

			if (hasLength && received.length >= expectedLen) {
				imgdata = received.slice(0, expectedLen);
				received = received.slice(expectedLen);
				hasLength = false;

				for (let waiter of waiters) {
					waiter.end();
				}

				waiters = [];
			} else {
				break;
			}
		}
	});
}).on("error", err => console.error(err)).listen(tcpport, "0.0.0.0");
console.log(`TCP listening on 0.0.0.0:${tcpport}`);

http.createServer((req, res) => {
	if (req.url.split("?")[0] == "/image") {
		res.writeHead(200, {
			"Content-Type": "image/jpeg",
		});
		res.end(imgdata);
	} else if (req.url.split("?")[0] == "/wait") {
		waiters.push(res);
	} else {
		res.writeHead(200);
		res.end(html);
	}
}).listen(httpport, "0.0.0.0");
console.log(`HTTP listening on 0.0.0.0:${httpport}`);