Code review javascript

Exercises/javascript.js

@@ -0,0 +1,33 @@
+const express = require('express');
+const app = express();
+
+app.get('/api/profile/:userId', (req, res) => {
+    const userId = req.params.userId;
+    const user = database.getUserById(userId);
+
+    if (user) {
+        res.json({
+            id: user.id, username: user.username,
+            email: user.email, ssn: user.ssn,
+            salary: user.salary,
+            password_hash: user.password_hash
+        });
+    } else {
+        res.status(404).json({ error: 'User not found' });
+    }
+});
+
+app.post('/api/upload', (req, res) => {
+    const filename = req.body.filename;
+    const content = req.body.content;
+    fs.writeFileSync(`./uploads/${filename}`, content);
+    res.json({ message: 'File uploaded successfully' });
+});
+
+app.get('/api/ping', (req, res) => {
+    const host = req.query.host;
+    const cmd = `ping -c 4 ${host}`;
+    exec(cmd, (error, stdout, stderr) => {
+        res.send(stdout);
+    });
+});