Native NodeJS server. File list in JSON, get and push files. run shell

server.js

var fs = require('fs');

var paths = [
	__dirname+"/data",
	__dirname,
];

mimeTypes = {
	"html": "text/html",
	"htm": "text/html",
	"jpeg": "image/jpeg",
	"jpg": "image/jpeg",
	"png": "image/png",
	"js": "text/javascript",
	"css": "text/css"
};

require('http').createServer(function (req, res) {
	console.log(req.method+" "+decodeURI(req.url));
	if (req.method=="GET") {
		for (var i=0;i<paths.length;i++) {
			var path = paths[i] + decodeURI(req.url).split("?")[0]||req.url;
			var mime = mimeTypes[path.split('.').pop()] || "text/plain";
			if (fs.existsSync(path)) {
				if (fs.statSync(path).isFile()) {
					res.writeHead(200, {'Content-Type': mime});
					var stream = fs.createReadStream(path);
					stream.on("open",function(){
						stream.pipe(res);
					});
					stream.on("error",function(err){
						res.end(err);
					});					
					return;	
				}
				else if (fs.statSync(path).isDirectory()) {
					res.writeHead(200, {"Content-Type": "text/json; charset=utf-8"});
					res.end(JSON.stringify(fs.readdirSync(path).map(file => {
						return file;
					})));
					return;
				}
			}
		}
	}
	else if (req.method=="POST") {
		for (var i=0;i<1;i++) {
			var path = paths[i] + decodeURI(req.url).split("?")[0]||req.url;
			var folder = path.split(/\//).slice(0,-1).join("//");
			if (!fs.existsSync(folder)) fs.mkdirSync(folder);
			var stream = fs.createWriteStream(path);
			stream.on("open",function(){
				req.pipe(stream);
			});
			stream.on("error",function(err){
				res.end("error save");
			});
			stream.on("finish",function(){
				res.end();
			});
			return;
		}
	}
	else if (req.method=="PATCH") {
		var cmd = decodeURI(req.url).slice(1);
		require("child_process").exec(cmd,{},function(error,stdout,stderr){
			res.end([error,stdout,stderr].filter(function(a){return a}).join("\n"));
		});	
		return;
	}
	else {
		res.writeHead(405, {'Content-Type': 'text/plain; charset=utf-8' });
		res.end(req.method + " "+req.url+" Method Not Allowed");
		return;
	}
	res.writeHead(400, { 'Content-Type': 'text/html; charset=utf-8' });
	res.end(req.method + " "+req.url+" Bad Request");
	return;
}).listen(8001);

console.log("http://localhost:8001");