Rest API - Request and Response Format
You want to implement conditional GET requests using ETag in your REST API. Which client header should be sent to enable this?
You want to implement conditional GET requests using ETag in your REST API. Which client header should be sent to enable this?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand conditional GET with ETag
The client sends If-None-Match with the ETag value to ask if resource changed.Step 2: Differentiate headers
If-Modified-Since uses date, Cache-Control controls caching, ETag is a response header, not request.Final Answer:
If-None-Match -> Option BQuick Check:
Conditional GET with ETag uses If-None-Match [OK]
Quick Trick: Use If-None-Match header to send ETag for conditional GET [OK]
Common Mistakes:
- Using ETag header in request instead of response
- Confusing If-Modified-Since with ETag validation
- Sending Cache-Control in request for conditional GET
Master "Request and Response Format" in Rest API
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