[Solved] Identify the error in this global middleware setup: export class AuthMiddleware implements NestMiddleware { use(req: Request, res: Response) { if (!req.headers.authorization) { res.status(401).... | NestJS

NestJS - Middleware

Identify the error in this global middleware setup:

export class AuthMiddleware implements NestMiddleware {
  use(req: Request, res: Response) {
    if (!req.headers.authorization) {
      res.status(401).send('Unauthorized');
    }
  }
}

// Applied with consumer.apply(AuthMiddleware).forRoutes('*')

AMissing call to next() to continue request processing

BMiddleware should not check headers

CforRoutes('*') cannot be used for global middleware

Dres.status(401) is invalid syntax

Step-by-Step Solution

Solution:

Step 1: Check middleware method signature
The use method lacks the next parameter and does not call next(), so request stops here.
Step 2: Understand middleware flow
Without calling next(), the request will hang or not proceed to route handlers after middleware.
Final Answer:
Missing call to next() to continue request processing -> Option A
Quick Check:
Middleware must call next() to proceed [OK]

Quick Trick: Always call next() in middleware to continue [OK]

Common Mistakes:

Omitting next() call in middleware
Misunderstanding middleware flow control
Thinking forRoutes('*') is invalid

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More NestJS Quizzes

Identify the error in this global middleware setup:

Step 1: Check middleware method signature

Step 2: Understand middleware flow

Final Answer:

Quick Check:

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