Extract certnode & stuffs out of app.js

index.js

@@ -1,63 +1,10 @@
 // development endpoint (use ngrok)
 
 const http = require('http');
+const listener = require('./src/client');
+
+const server = http.createServer(listener);
 const port = (process.argv.length >= 2 ? parseInt(process.argv[2]) : 0) || 3000;
-const record_prefix = 'forward-domain=';
-
-const {
-    default: axios
-} = require('axios');
-const path = require('path');
-
-/**
- * @type {Object<string, {expire: number, expand: boolean, url: string}>}
- */
-const resolveCache = {};
-
-async function buildCache(host) {
-    const resolve = await axios(`https://dns.google/resolve?name=${encodeURIComponent(host)}&type=TXT`);
-    if (resolve.data.Answer) {
-        for (const head of resolve.data.Answer) {
-            if (!head.data.startsWith(record_prefix))
-                continue;
-            let url = head.data.slice(record_prefix.length);
-            let expand = false;
-            if (url.indexOf('http://') !== 0 && url.indexOf('https://') !== 0) {
-                throw new Error(url + ' in TXT record is not an absolute URL');
-            }
-            if (url.endsWith('*')) {
-                url = url.slice(0, -1);
-                expand = true;
-            }
-            return {
-                url,
-                expand,
-                expire: Date.now() + Math.max(head.TTL, 86400) * 1000,
-            };
-        }
-    }
-    throw new Error(record_prefix + ' TXT is missing');
-}
-
-const server = http.createServer(async function (req, res) {
-    try {
-        let cache = resolveCache[req.headers.host];
-        if (!cache || (Date.now() > cache.expire)) {
-            cache = await buildCache(req.headers.host);
-            resolveCache[req.headers.host] = cache;
-        }
-        res.writeHead(301, {
-            'Location': cache.expand ? path.join(cache.url, req.url) : cache.url,
-        });
-        return;
-    } catch (error) {
-        res.writeHead(400);
-        res.write(error.message || 'Unknown error');
-    } finally {
-        res.end();
-    }
-})
-
 
 if (require.main === module) {
     server.listen(port, function () {