HTTP

Tag

Caching

12 resources tagged Caching across methods, status codes, headers, cookies, guides, and glossary.

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HTTP Status Codes

304 Not Modified

Cached response is still valid. Learn how 304 Not Modified improves performance through conditional requests and caching.

 HTTP Headers

Age Header

Learn how the Age header indicates how long a response has been cached in seconds. Understand cache freshness calculations and CDN behavior.

 HTTP Headers

Cache-Control Header: Complete HTTP Caching Guide

Master the Cache-Control header. Learn how to control browser and CDN caching with max-age, no-cache, no-store, and other directives.

 HTTP Headers

ETag

Learn how the ETag header provides a unique identifier for resource versions, enabling efficient cache validation and conditional requests to reduce bandwidth.

 HTTP Headers

Expires Header

Learn how the Expires header specifies when cached responses become stale. Understand date formats and when to use Expires vs Cache-Control for caching.

 Guides

HTTP Headers and Caching: A Practical Guide

Master HTTP caching with Cache-Control, ETag, Last-Modified, and conditional request headers. Learn how to optimize performance with proper cache strategies.

 HTTP Headers

If-Modified-Since Header

Learn how the If-Modified-Since header requests resources only if modified since a specific date. Reduce bandwidth with efficient conditional caching.

 HTTP Headers

If-None-Match Header

Learn how the If-None-Match header makes conditional requests using ETags. Avoid downloading unchanged resources and reduce bandwidth with cache validation.

 HTTP Headers

If-Unmodified-Since Header

Learn how the If-Unmodified-Since header makes requests conditional on resources not being modified. Prevent conflicts in concurrent update scenarios.

 HTTP Headers

Last-Modified

Learn how the Last-Modified header indicates when a resource was last changed. Enable efficient cache validation with If-Modified-Since conditional requests.

 HTTP Headers

Vary

Learn how the Vary header specifies which request headers affect the response. Essential for proper cache differentiation and content negotiation.

 HTTP Headers

Warning Header

Learn about the deprecated Warning header that provided additional status information about message transformations. Understand why it was removed from HTTP.