richiama se errore socket hang up

src/server.js

@@ -58,11 +58,25 @@ app.post('/query', async (req, res) => {
             res.json({});
         }
     } catch (err) {
-        console.error('Error...', err.message)
-        res.status(500).json({ error: err.message });
+        // se err.messagge === 'socket hang up' allora attendi 2 secondi e richiama sql.query
+        if (err.message.trim() === 'socket hang up') {
+            await new Promise((resolve) => setTimeout(resolve, 2000));
+            const result = await sql.query(req.body.query);
+            console.log(' ... tornato');
+            if (result) {
+                console.log('Risultato:', result.recordset);
+                res.json(result.recordset);
+            } else {
+                res.json({});
+            }
+        } else {
+            console.error('Error...', err.message)
+            res.status(500).json({ error: err.message });    
+        }
     } finally {
         sql.close();
     }
+
 });
 
 const PORT = process.env.SERVER_PORT || 3000;