[Solved] What is wrong with this API key validation snippet? function validateKey(request) { if (request.headers['Authorization'] === null) { return 'No key' } return 'Valid key' } | Microservices

Microservices - Authentication and Authorization

What is wrong with this API key validation snippet?

function validateKey(request) {
  if (request.headers['Authorization'] === null) {
    return 'No key'
  }
  return 'Valid key'
}

ANo error, code works as expected

BIt uses strict equality which is incorrect here

CIt should check for empty string instead of null

DIt only checks for null, missing or undefined keys are ignored

Step-by-Step Solution

Solution:

Step 1: Analyze key existence check
Checking only for null misses undefined or missing keys.
Step 2: Understand impact on validation
Missing keys will not trigger 'No key' message, causing incorrect validation.
Final Answer:
It only checks for null, missing or undefined keys are ignored -> Option D
Quick Check:
Check for all missing cases, not just null [OK]

Quick Trick: Check for undefined and null when validating keys [OK]

Common Mistakes:

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What is wrong with this API key validation snippet?