A server written with plain TCP sockets in Node. Needs files residing in ./static/.

wouter.js

var methods = [ "GET" ];
var protocol = [ "HTTP/1.1", "HTTP/1.0" ];

var errorCodes = {
	100: "Continue",
	101: "Switching Protocols",
	102: "Processing",
	200: "OK",
	201: "Created",
	202: "Accepted",
	203: "Non-Authoritative Information",
	204: "No Content",
	205: "Reset Content",
	206: "Partial Content",
	207: "Multi-Status",
	208: "Already Reported",
	226: "IM Used",
	300: "Multiple Choices",
	301: "Moved Permanently",
	302: "Found",
	303: "See Other",
	304: "Not Modified",
	305: "Use Proxy",
	307: "Temporary Redirect",
	308: "Permanent Redirect",
	400: "Bad Request",
	401: "Unauthorized",
	402: "Payment Required",
	403: "Forbidden",
	404: "Not Found",
	405: "Method Not Allowed",
	406: "Not Acceptable",
	407: "Proxy Authentication Required",
	408: "Request Timeout",
	409: "Conflict",
	410: "Gone",
	411: "Length Required",
	412: "Precondition Failed",
	413: "Payload Too Large",
	414: "URI Too Long",
	415: "Unsupported Media Type",
	416: "Requested Range Not Satisfiable",
	417: "Expectation Failed",
	422: "Unprocessable Entity",
	423: "Locked",
	424: "Failed Dependency",
	425: "Unassigne",
	426: "Upgrade Required",
	427: "Unassigne",
	428: "Precondition Required",
	429: "Too Many Requests",
	430: "Unassigne",
	431: "Request Header Fields Too Large",
	500: "Internal Server Error",
	501: "Not Implemented",
	502: "Bad Gateway",
	503: "Service Unavailable",
	504: "Gateway Timeout",
	505: "HTTP Version Not Supported",
	506: "Variant Also Negotiates",
	507: "Insufficient Storage",
	508: "Loop Detected",
	509: "Unassigne",
	510: "Not Extended",
	511: "Network Authentication Required"
};

var makeResponse = function (err, headers) {
	if (!err) err = 200;

	var res = protocol[0] + " " + err + " " + errorCodes[err];

	if (headers) {
		res += "\n" + Object.keys(headers).map(function (header) {
			return header + ": " + headers[header];
		}).join("\n");
	}

	return res;
}

var crypto = require("crypto"),
	fs = require("fs"),
       net = require("net");

net.createServer(function (sock) {
	sock.on("data", function (data) {
		data = data.toString().split("\r\n");

		var sign = data[0].split(" ");

		var method = sign[0],
		      path = sign[1],
		  protocol = sign[2];

		if ( !~methods.indexOf(method) )
			return sock.end(makeResponse(501));

		var headers = data.slice(1, data.indexOf(""));

		var rpath = "./static" + path;

		return fs.exists(rpath, function (exists) {
			if (!exists) return sock.end(makeResponse(404));

			fs.stat(rpath, function (err, stat) {
				if (stat.isDirectory()) {
					if (rpath[rpath.length - 1] !== "/") {
						return sock.end(makeResponse(307, {
							Location: path + "/"
						}))
					}

					return fs.exists(rpath + "/index.html", function (exists) {
						if (!exists) return sock.end(makeResponse(404));

						sock.write(makeResponse(200) + "\n\n")
						fs.createReadStream(rpath + "/index.html").pipe(sock);
					});
				}

				sock.write(makeResponse(200) + "\n\n")

				fs.createReadStream(rpath).pipe(sock);
			})
		})
	})

	sock.on("error", new Function)
}).listen(8045);