Question

You want to create a LoggingInterceptor that logs the request method, URL, and the time taken for each request. Which code snippet correctly implements this behavior?

Accepted Answer

intercept(context, next) {
  const req = context.switchToHttp().getRequest();
  const now = Date.now();
  return next.handle().pipe(
    tap(() => console.log(`${req.method} ${req.url} - ${Date.now() - now}ms`))
  );
}

Answer

intercept(context, next) {
  const req = context.getRequest();
  const now = Date.now();
  next.handle().pipe(
    tap(() => console.log(`${req.method} ${req.url} - ${Date.now() - now}ms`))
  );
}

Answer

intercept(context, next) {
  const req = context.switchToHttp().getRequest();
  const now = Date.now();
  return next.handle().pipe(
    map(() => console.log(`${req.method} ${req.url} - ${Date.now() - now}ms`))
  );
}

Answer

intercept(context, next) {
  const req = context.switchToHttp().getRequest();
  const now = Date.now();
  return next.handle().pipe(
    tap(() => console.error(`${req.method} ${req.url} - ${Date.now() - now}ms`))
  );
}

You want to create a LoggingInterceptor that logs the request method, URL, and the time taken for each request. Which code snippet correctly implements this behavior?

Step 1: Access request object correctly

Step 2: Use tap operator for side effects

Final Answer:

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