HTTP Concepts

Conditional Request

An HTTP request that includes conditions (If-Match, If-None-Match, If-Modified-Since) allowing the server to respond with 304 Not Modified if the resource hasn't changed.

관련 프로토콜

HTTP

가이드에서 언급됨

HTTP Conditional Requests: If-Match, If-None-Match, and Beyond HTTP Fundamentals

Choosing the Right HTTP Status Codes for REST APIs API Design & Best Practices

RFC 9110: HTTP Semantics Deep Dive Protocol Deep Dives

관련 시나리오

409 Conflict — Optimistic Locking Failure HTTP

304 Not Modified — Cache Serving Stale Content HTTP

FAILED_PRECONDITION — Stale State in Distributed System gRPC

정의 출처

RFC 9110 HTTP Semantics

RFC 9111 HTTP Caching

의사결정 가이드

Which HTTP Success Code Should I Return? Should I Cache This HTTP Response?

관련 항목

Range Request HTTP Concepts

Cache-Control Caching & Performance

ETag (Entity Tag) Caching & Performance

Last-Modified Caching & Performance

Conditional Headers Web Standards