Web cache: Difference between revisions

{{short description|System for optimizing the Web}}

A '''Web cache''' (or '''HTTP cache''') is a system for optimizing the [[World Wide Web]]. It is implemented both [[client-side]] and [[server-side]]. The [[cache (computing)|caching]] of [[multimedia]] and other [[computer file|files]] can result in less overall delay when [[web browser|browsing]] the Web.<ref>{{Cite web |last=Fountis |first=Yorgos |date=4 May 2017 |title=How does the browser cache work? |url=https://pressidium.com/blog/2017/browser-cache-work/}}</ref><ref>{{Cite journal |last1=Messaoud |first1=S. |last2=Youssef |first2=H. |date=2009 |title=An analytical model for the performance evaluation of stack-based Web cache replacement algorithms |url=https://onlinelibrary.wiley.com/doi/10.1002/dac.1036 |journal=International Journal of Communication Systems |language=en |volume=23 |pages=1–22 |doi=10.1002/dac.1036|s2cid=46507769 }}</ref>

The [[Hypertext Transfer Protocol (Secure)|Hypertext Transfer Protocol]] (HTTP) defines three basic mechanisms for controlling caches: freshness, validation, and invalidation.<ref>{{cite web |url=http://ws-rest.org/files/03-Link%20Header-based%20Invalidation%20of%20Caches.pdf |title=Using HTTP Link: Header for Gateway Cache Invalidation |access-date=14 June 2013 |first1=Mike |last1=Kelly |first2=Michael |last2=Hausenblas |pages=20 |work=WS-REST |archive-date=10 July 2010 |archive-url=https://web.archive.org/web/20100710072021/http://www.ws-rest.org/files/03-Link%20Header-based%20Invalidation%20of%20Caches.pdf |url-status=dead }}</ref> This is specified in the header of HTTP response messages from the server.

This is a list of server-side web caching software.
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