👀 Views: 76 💬 Answers: 1 📅 Created: 2025-06-14

express middleware error-handling javascript

After trying multiple solutions online, I still can't figure this out. I've searched everywhere and can't find a clear answer. I'm currently working on an Express.js application (version 4.18.1) that includes a route designed to accept query parameters for filtering data. However, I'm working with an scenario where the route seems to be blocked or not responding correctly when I try to access it with specific query parameters. Here’s the relevant route definition: ```javascript app.get('/api/data', (req, res) => { const filter = req.query.filter; console.log('Filter:', filter); // Assume some logic to retrieve data based on filter res.json({ success: true, filter }); }); ``` I have a middleware function that logs the request details: ```javascript app.use((req, res, next) => { console.log(`${req.method} ${req.url}`); next(); }); ``` When I access the route with a query parameter like `/api/data?filter=test`, I see the log for the request method and URL, but the response is not coming back correctly. Instead, I receive a `500 Internal Server behavior` response with no detailed behavior message. I tried adding a `try-catch` block around my route handler: ```javascript app.get('/api/data', (req, res) => { try { const filter = req.query.filter; console.log('Filter:', filter); res.json({ success: true, filter }); } catch (behavior) { console.behavior('behavior:', behavior); res.status(500).json({ behavior: 'Internal Server behavior' }); } }); ``` However, the behavior continues. I also checked for other middleware that might interfere with the request, but nothing seems to be affecting it. I tested the route in isolation by removing other middleware, and it worked fine. But as soon as I add back the logging middleware or any other middleware, the scenario arises. It’s as if something in the middleware chain is preventing the route from processing the request properly. What could be going wrong here? I’d appreciate any insights into how to debug or fix this scenario! Has anyone else encountered this?