working example

index.js

@@ -10,7 +10,8 @@ const express = require("express");           // could be good to replace with c
 // Get port or default to 8082
 const port = process.env.PORT || 8082;
 const protocol = 'https'
-const subclass = '192.168.4.'
+// TODO merge from responsive-workspace-demoday
+const subclass = '192.168.0.'
 
 const publicKeyPath = path.resolve(process.env.HOME,'.ssh','id_rsa_offlineoctopus.pub')
 const publicKey = fs.readFileSync(publicKeyPath).toString().split(' ')[1]
@@ -245,13 +246,13 @@ app.get('/foundpeers', (req, res) => {
 
 let foundPeers = []
 app.get('/scan', (req, res) => {
-	scanpeers()
+	scanpeers(res)
-	res.json( {msg: 'started'} ) // could redirect('/foundpeers') too after a timeout
+	//res.json( {msg: 'started'} ) // could redirect('/foundpeers') too after a timeout
 })
 
-function scanpeers(){
+function scanpeers(queryres=null){
 	foundPeers = []
-	for (let i=1;i<25;i++){ // async so blasting, gives very quick result for positives
+	for (let i=1;i<254;i++){ // async so blasting, gives very quick result for positives
 		let url=protocol+'://'+subclass+i+':'+port+'/available'
 		let opt={rejectUnauthorized: false}
 		https.get(url, opt, res => {
@@ -268,6 +269,8 @@ function scanpeers(){
 		  //console.log(err.message); usually ECONNREFUSED or EHOSTUNREACH
 		}).end()
 	}
+	if (queryres) setTimeout( _ => queryres.json( foundPeers), 1000 )
+	// timing heuristic
 }
 
 app.get('/sshconfig', (req, res) => {
@@ -381,3 +384,12 @@ const webServer = https.createServer(credentials, app);
 webServer.listen(port, () => {
     console.log("listening on "+protocol+"://localhost:" + port);
 });
+
+const { createProxyMiddleware } = require('http-proxy-middleware');
+app.use(
+  '/proxied',
+  createProxyMiddleware({
+	  target: 'http://localhost:8080',
+	  pathRewrite: { '^/proxied' : ''},
+  })
+)