You need to design a webhook registration endpoint that prevents duplicate registrations for the same callback_url. Which approach is best?

hard📝 Application Q8 of 15

Rest API - Webhooks and Events

You need to design a webhook registration endpoint that prevents duplicate registrations for the same callback_url. Which approach is best?

ACheck if <code>callback_url</code> exists in storage before adding; return 409 Conflict if duplicate

BStore each registration without checking duplicates; handle duplicates later

CAllow duplicates but send warning in response

DIgnore duplicates silently and always return 201 Created

Step-by-Step Solution

Solution:

Step 1: Understand duplicate registration issues
Duplicates can cause repeated event notifications or wasted resources.
Step 2: Use proper HTTP status for duplicates
Checking storage and returning 409 Conflict prevents duplicates clearly and correctly.
Final Answer:
Check if callback_url exists in storage before adding; return 409 Conflict if duplicate -> Option A
Quick Check:
Prevent duplicates with 409 Conflict response [OK]

Quick Trick: Use 409 Conflict to reject duplicate webhook URLs [OK]

Common Mistakes:

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