HTTP/2 Server Push: Difference between revisions

Revision as of 21:50, 29 October 2024

Latest revision as of 13:29, 2 July 2025

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{{Short description|Outdated web optimization protocol}}

{{use dmy dates|date=April 2022|cs1-dates=y}}

{{Multiple issues|

{{more citations needed |date=May 2016}}

{{tone |date=September 2017}}

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'''HTTP/2 Server Push''' is an optional<ref>{{Cite journal |date=May 2015 |title=Hypertext Transfer Protocol Version 2 (HTTP/2) |doi=10.17487/RFC7540 |url=https://www.rfc-editor.org/rfc/rfc7540 |quote=A client can request that server push be disabled|last1=Belshe |first1=M. |last2=Peon |first2=R. |last3=Thomson |first3=M. |editor-first1=M |editor-last1=Thomson |doi-access=free }}</ref> feature of the [[HTTP/2]] and [[HTTP/3]] [[Communication protocol|network protocols]] that allows [[Server-side|servers]] to send resources to a [[Client–server model|client]] before the client requests them. Server Push is a performance technique aimed at reducing latency by sending resources to a client preemptively before it knows they will be needed.<ref>{{Cite web |last=Staff |first=Ars |date=2015-02-18 |title=HTTP/2 finished, coming to browsers within weeks |url=https://arstechnica.com/information-technology/2015/02/http2-finished-coming-to-browsers-within-weeks/ |access-date=2023-01-12 |website=Ars Technica |language=en-us}}</ref> In practice, Server Push frequently results in wasted bandwidth because the server rarely knows which resources are already loaded by the client and transmits the same resource multiple times, resulting in slowdowns if the resources being pushed compete for bandwidth with resources that were requested.<ref name=":0">{{Cite web |date=2020-11-11 |title=Intent to Remove: HTTP/2 and gQUIC server push |url=https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/vOWBKZGoAQAJ?pli=1 |url-status=live |archive-url=https://web.archive.org/web/20211128080039/https://groups.google.com/a/chromium.org/g/blink-dev/c/K3rYLvmQUBY/m/vOWBKZGoAQAJ?pli=1 |archive-date=2021-11-28 |access-date=2022-04-12 |website=[[Google Groups]] |language=en}}</ref>