How do you inject the raw HTTP request object inside a REQUEST-scoped provider in NestJS?

0-2 years experience

1. 1You need to log the incoming IP address inside a service that's request-scoped. How would you get the raw request object into that service?
2. 2If you accidentally mark the provider as singleton, what will happen when you try to access request-specific data?

2-5 years experience

1. 1We're adding a feature that reads a custom header and stores it in a per-request cache service. Walk me through how you'd inject the request object into that cache service and any pitfalls.
2. 2During testing, the request object is undefined in a request-scoped provider. What could cause that and how would you debug it?

5-8 years experience

1. 1Our API gateway creates thousands of concurrent requests. Discuss the trade-offs of using request-scoped providers with injected request objects versus passing data via method parameters.
2. 2You notice memory usage growing over time when using request-scoped providers. How would you investigate if the injected request object is causing a leak?

8+ years experience

1. 1We plan to migrate from NestJS's default Express platform to Fastify. How would that affect the way you inject the raw request object into request-scoped providers, and what architectural changes would you recommend?
2. 2Multiple teams need to share request metadata across different modules without tightly coupling to the HTTP layer. Propose a design that leverages request-scoped injection while keeping the core domain services framework-agnostic.