idea

index.js

@@ -0,0 +1,123 @@
+const http = require("http");
+const fs = require("fs");
+const path = require("path");
+const express = require("express");           // could be good to replace with code, no dep
+
+const port = process.env.PORT || 7788;
+const configFilePath = path.resolve(__dirname, "config.json")
+const usageFilePath = path.resolve(__dirname, "usage.json")
+process.title = 'onhygi' 
+
+// didn't work on its own with ^C nor killall
+process.on('beforeExit', _ => { console.log('trying to save before exit') });
+// process.on('exit', _ => { console.log('trying to save on exit') });
+
+// catching signals and do something before exit
+['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
+    'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
+].forEach(function (sig) {
+    process.on(sig, function () {
+        terminator(sig);
+        console.log('signal: ' + sig);
+    });
+});
+
+function terminator(sig) {
+    if (typeof sig === "string") {
+	    console.log('Received %s - terminating server app ...', sig);
+	    console.log('trying to save on exit')
+	    fs.writeFileSync(usageFilePath, JSON.stringify( usage ))
+	    process.exit(1);
+    }
+    console.log('Node server stopped.');
+}
+// from https://stackoverflow.com/a/40574758/1442164
+
+var usage = {}
+if (fs.existsSync( usageFilePath ) ){
+	console.log('found usage file')
+	usage = JSON.parse( fs.readFileSync(usageFilePath).toString() )
+}
+console.log('past usage', usage)
+
+// does not apply in a P2P fashion, must rely on local configuration here config.json
+let quota = [
+	{id:"ownhome", pattern:/.*fabien\.benetou\.fr.*/, perHour:10, perDay:200},
+	{id:"twitter",pattern:/.*twitter\.com.*/,perHour:1,perDay:12},
+	{id:"proton",pattern:/.*proton\.me.*/,perHour:6,perDay:12},
+	{id:"yt",pattern:/.*youtube\.com.*/,perHour:1,perDay:12},
+	{id:"linkedin",pattern:/.*linkedin\.com.*/,perHour:1,perDay:12},
+	{id:"reddit",pattern:/.*reddit\.com.*/,perHour:1,perDay:12},
+	{id:"element",pattern:/.*element\.io.*/,perHour:1,perDay:12},
+	{id:"discord",pattern:/.*discord\.com.*/,perHour:1,perDay:12},
+]
+// could also check on time, e.g not before 7am nor after 10pm as done via tridactyl now
+
+if (fs.existsSync( configFilePath ) ){
+	const configurationFromFile = JSON.parse( fs.readFileSync( configFilePath ).toString() )
+	console.log('found quota file')
+	quota = configurationFromFile
+}
+console.log('quota', quota)
+quota.map( rule => { if (typeof usage[rule.id] == 'undefined') usage[rule.id] = [] } )
+
+// Setup and configure Express http server.
+const app = express();
+
+// CORS
+app.use(function(req, res, next) {
+    res.header("Access-Control-Allow-Origin", "*"); 
+    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
+    next();
+});
+
+app.get('/', (req, res) => {
+	res.json( quota )
+})
+
+app.get('/check', (req, res) => {
+	console.log('starting check')
+	if (!req.query.url) {
+		res.sendStatus(400);
+		console.log('no url found')
+		return;
+	}
+	let matched = false
+	quota.map( rule => {
+		if ( req.query.url.match( rule.pattern ) ){
+			matched = true
+			console.log('match on', rule.id)
+			let now = Date.now()/1000 
+			usage[rule.id].push( now )
+			if ( usage[rule.id].filter( t => t>now-60*60).length > rule.perHour ){
+				res.json( { passed: false, msg: 'over quota per hour' } )
+				return
+			}
+			if ( usage[rule.id].filter( t => t>now-60*60*24).length > rule.perDay ){
+				res.json( { passed: false, msg: 'over quota per day' } )
+				return
+			}
+			res.json( { passed: true, msg: 'within quota' } )
+			return // returns from map, not get
+		}
+	})
+	if (!matched) {
+		res.json( { passed: true, msg: 'no quota' } )
+		console.log('no match')
+	}
+	// otherwise assume response already sent
+})
+
+/*
+const privateKey = fs.readFileSync("naf-key.pem", "utf8");
+const certificate = fs.readFileSync("naf.pem", "utf8");
+const credentials = { key: privateKey, cert: certificate };
+const webServer = https.createServer(credentials, app);
+*/
+
+// Start Express http server
+const webServer = http.createServer(app);
+// Listen on port
+webServer.listen(port, () => {
+    console.log("listening on http://localhost:" + port);
+});