query migliorata

src/server.js

@@ -44,39 +44,48 @@ app.get('/test', (req, res) => {
 });
 
 // Endpoint per eseguire query
+const sql = require('mssql');
+
 app.post('/query', async (req, res) => {
+    let retry = false;
     try {
-        console.log('Connect con config...')
+
-        await sql.connect(config);
+        if (!req.body.query || typeof req.body.query !== 'string') {
-        console.log('query...', req.body.query)
+            return res.status(400).json({ error: 'Query non valida' });
-        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({});
-        }
-    } catch (err) {
-        // 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();
         }
 
+        console.log('Connect con config...');
+        await sql.connect(config);
+
+        const doQuery = async () => {
+            console.log('Eseguo query:', req.body.query);
+            const result = await sql.query(req.body.query);
+            console.log('Query completata');
+            return result;
+        };
+
+        let result;
+
+        try {
+            result = await doQuery();
+        } catch (err) {
+            if (err.message.trim() === 'socket hang up' && !retry) {
+                console.warn('⚠️ socket hang up — attendo 5 secondi e riprovo...');
+                retry = true;
+                await new Promise(resolve => setTimeout(resolve, 5000));
+                result = await doQuery();
+            } else {
+                throw err;
+            }
+        }
+
+        res.json(result?.recordset || {});
+    } catch (err) {
+        console.error('❌ Errore nella query:', err.message);
+        res.status(500).json({ error: err.message });
+    } finally {
+        sql.close(); // chiude anche se fallisce
+    }
 });
 
 const PORT = process.env.SERVER_PORT || 3000;