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.

Giao thức liên quan

HTTP

Được đề cập trong hướng dẫn

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

Tình huống liên quan

409 Conflict — Optimistic Locking Failure HTTP

304 Not Modified — Cache Serving Stale Content HTTP

FAILED_PRECONDITION — Stale State in Distributed System gRPC

Được định nghĩa trong

RFC 9110 HTTP Semantics

RFC 9111 HTTP Caching

Hướng dẫn quyết định

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

Xem thêm

Range Request HTTP Concepts

Cache-Control Caching & Performance

ETag (Entity Tag) Caching & Performance

Last-Modified Caching & Performance

Conditional Headers Web Standards