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Fix Vercel serverless backend #7

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Fix Vercel serverless backend #7

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33 changes: 33 additions & 0 deletions api/index.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
const express = require('express');
const app = express();

app.use(express.json());

app.get('/api/health', (req, res) => {
res.json({ status: "ok" });
});

app.get('/api/auth/check-username', (req, res) => {
res.json({ available: true });
});

app.post('/api/auth/login', (req, res) => {
res.json({ success: true });
});

app.post('/api/auth/signup', (req, res) => {
res.json({ success: true });
});
Comment on lines +10 to +20

@coderabbitai coderabbitai Bot Feb 5, 2026

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⚠️ Potential issue | 🟠 Major

Auth endpoints are stubs with no actual authentication logic.

All auth endpoints return hardcoded success responses without validating credentials or checking usernames. If this is intentional placeholder code for development, add clear comments indicating these are stubs. If deployed to production, this would be a critical security vulnerability.

  • check-username ignores the query parameter and always returns available: true
  • login accepts any credentials and returns success: true
  • signup accepts any input and returns success: true
📝 Suggested: Add TODO comments to clarify stub behavior 
+// TODO: Implement actual username availability check against database
 app.get('/api/auth/check-username', (req, res) => {
+  // STUB: Always returns available for development purposes
   res.json({ available: true });
 });

+// TODO: Implement actual authentication with credential validation
 app.post('/api/auth/login', (req, res) => {
+  // STUB: Always returns success for development purposes
   res.json({ success: true });
 });

+// TODO: Implement actual user registration with validation
 app.post('/api/auth/signup', (req, res) => {
+  // STUB: Always returns success for development purposes
   res.json({ success: true });
 });
🤖 Prompt for AI Agents 
In `@api/index.js` around lines 10 - 20, The auth routes
app.get('/api/auth/check-username'), app.post('/api/auth/login'), and
app.post('/api/auth/signup') are currently returning hardcoded responses; update
them to either implement real validation or clearly mark them as development
stubs: for a quick safe fix, read the incoming params (req.query.username in
check-username, req.body in login/signup), perform basic validation and return
appropriate status codes and messages (e.g., 400 for missing fields, 200 with
{available:false} when username taken), OR add explicit TODO comments above each
handler documenting that these are non-production stubs and guard them behind a
development-only flag (e.g., process.env.NODE_ENV !== 'production') so they
cannot run in production. Ensure the change references the route handlers named
above so reviewers can find the code.


// 404 Handler for unknown routes to ensure JSON response
app.use((req, res, next) => {
res.status(404).json({ error: "Not Found" });
});

// Global Error Handler
app.use((err, req, res, next) => {
console.error(err);
res.status(500).json({ error: "Internal Server Error" });
});

module.exports = app;
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