NodeJS bugfix, js_samples script

python_aternos/atjsparse.py

@@ -104,6 +104,7 @@ class NodeInterpreter(Interpreter):
     def get_var(self, name: str) -> Any:
         resp = requests.post(self.url, data=name)
         resp.raise_for_status()
+        logging.debug('NodeJS response: %s', resp.content)
         return json.loads(resp.content)
 
     def __del__(self) -> None:

python_aternos/data/server.js

@@ -3,11 +3,21 @@ const process = require('process')
 
 const { VM } = require('vm2')
 
-args = process.argv.slice(2)
-
+const args = process.argv.slice(2)
 const port = args[0] || 8000
 const host = args[1] || 'localhost'
 
+const vm = new VM({
+    timeout: 2000,
+    allowAsync: false,
+    sandbox: {
+        atob: atob,
+        setTimeout:  (_a, _b) => {},
+        setInterval: (_a, _b) => {},
+    },
+})
+vm.run('var window = global; var document = {}')
+
 const listener = (req, res) => {
 
     if (req.method != 'POST')
@@ -18,15 +28,12 @@ const listener = (req, res) => {
 
     req.on('end', () => {
         let resp
-        try { resp = JSON.stringify(new VM().run(body)) }
+        try { resp = JSON.stringify(vm.run(body)) }
         catch (ex) { resp = ex.message }
         res.writeHead(200)
         res.end(resp)
     })
 }
 
-window = global
-document = window.document || {}
-
 const server = http.createServer(listener)
 server.listen(port, host, () => console.log('OK'))