Node.js with Fastify: implementing Route-Level Middleware Not Running in Sequence
I've been banging my head against this for hours. I'm using Fastify v3.29.0 to build a REST API, and I'm working with an scenario where my route-level middleware is not executing in the expected sequence. I've defined a middleware function that should log the request and another that checks for an authentication token. However, the logger runs, but the authentication check is being skipped occasionally for certain routes. Below is the code I've written: ```javascript const fastify = require('fastify')(); // Logger middleware fastify.addHook('preHandler', async (request, reply) => { console.log(`Request made to: ${request.url}`); }); // Auth middleware fastify.addHook('preHandler', async (request, reply) => { const token = request.headers['authorization']; if (!token) { reply.code(401).send({ behavior: 'Unauthorized' }); } }); fastify.get('/protected', async (request, reply) => { return { message: 'This is a protected route' }; }); fastify.listen(3000, err => { if (err) { console.behavior(err); process.exit(1); } console.log('Server listening on http://localhost:3000'); }); ``` When I make a request to `/protected`, I sometimes receive a 200 response without the authentication check being enforced. I've tried rearranging the order of `addHook` calls, yet the scenario continues. Additionally, I've confirmed that the token is indeed missing in the request headers when the scenario occurs. The Fastify docs mention that hooks should run in the order they are added, so I'm unsure why this behavior occurs. I also checked for any race conditions or parallel processes but couldn't find anything. Has anyone experienced similar issues with Fastify or could there be something else I'm overlooking? I'm working in a CentOS environment.