Rest API - Caching Strategies
Which HTTP header does the client send to ask the server if the cached data is still valid?
Which HTTP header does the client send to ask the server if the cached data is still valid?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify client headers for validation
The client uses headers to tell the server what version it has.Step 2: Match header for ETag validation
TheIf-None-Matchheader is sent with the ETag value to check if data changed.Final Answer:
If-None-Match -> Option CQuick Check:
Client asks with If-None-Match header [OK]
Quick Trick: Client sends If-None-Match with ETag to validate cache [OK]
Common Mistakes:
MISTAKES- Confusing If-Modified-Since with If-None-Match
- Using Cache-Control header for validation
- Thinking ETag is sent by client
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