</>
ProtocolCodes
All Codes Comparisons Glossary Guides Tools
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.

Related Protocols

HTTP

Mentioned in Guides

Choosing the Right HTTP Status Codes for REST APIs API Design & Best Practices
RFC 9110: HTTP Semantics Deep Dive Protocol Deep Dives

See Also

Range Request HTTP Concepts
Cache-Control Caching & Performance
ETag (Entity Tag) Caching & Performance
Last-Modified Caching & Performance
Conditional Headers Web Standards
← Back to Glossary