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serv.mjs
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import url from 'url';
import net from 'net';
import fs from 'fs';
import http from 'http';
import path from 'path';
const PORT = 5009;
const HOST = "localhost"
const INDEX = "index.html"
const basedir = process.cwd();
export const exports = {};
let mimemap = {
".js" : "application/javascript",
".cjs" : "application/javascript",
".mjs" : "application/javascript",
".json" : "text/json",
".html" : "text/html",
".png" : "image/png",
".jpg" : "image/jpeg",
".css" : "text/css",
".svg" : "image/svg+xml",
".wasm" : "application/wasm",
};
let getMime = (p) => {
p = p.toLowerCase().trim();
for (let k in mimemap) {
if (p.endsWith(k)) {
return mimemap[k];
}
}
return "text/plain";
}
let allowed_origins = new Set([
`http://${HOST}:${PORT}/`,
`http://${HOST}:${PORT}`
]);
exports.ServerResponse = class ServerResponse extends http.ServerResponse {
_addHeaders(origin) {
this.setHeader("X-Content-Type-Options", "nosniff");
if (allowed_origins.has(origin)) {
this.setHeader("Access-Control-Allow-Origin", origin);
}
this.setHeader("Document-Policy", "js-profiling");
this.setHeader("Cross-Origin-Opener-Policy", "same-origin");
this.setHeader("Cross-Origin-Resource-Policy", "same-origin");
this.setHeader("Cross-Origin-Embedder-Policy", "require-corp");
this.setHeader("Vary", "Origin");
}
sendError(code, message) {
let buf = `<!doctype html>
<html>
<head><title>404</title></head>
<body><div>${message}<div><body>
</html>
`;
this.statusCode = code;
this.setHeader('Host', HOST);
this.setHeader('Content-Type', 'text/html');
this.setHeader('Content-Length', buf.length);
this._addHeaders();
this.writeHead(code)
this.end(buf);
}
}
const serv = http.createServer({
ServerResponse : exports.ServerResponse
}, (req, res) => {
let p = req.url.trim();
if (!p.startsWith("/")) {
p = "/" + p
}
let origin = req.headers["origin"] || "";
console.log(req.method, p, origin);
if (p === "/") {
p += INDEX
}
p = path.normalize(basedir + p);
if (p.search(/\.\./) >= 0 || !p.startsWith(basedir)) {
//normalize failed
return res.sendError(500, "malformed path");
}
let stt;
try {
stt = fs.statSync(p);
} catch(error) {
return res.sendError(404, "bad path");
}
if (stt === undefined || stt.isDirectory() || !stt.isFile()) {
console.log("access error for", p);
return res.sendError(404, "bad path");
}
let mime = getMime(p);
let buf = fs.readFileSync(p);
res.statusCode = 200;
res.setHeader('Content-Type', mime);
res._addHeaders(origin);
res.end(buf);
});
serv.listen(PORT, HOST, () => {
console.log("Server listening on", HOST + ":" + PORT);
});