May 2022
Beginner to intermediate
756 pages
21h 30m
Korean
book
HTTP 완벽 가이드
by David Gourlry, Brian Totty, Lee Eung Jun, Sang -Il Jeong, Anshu Agarwal, Seilu Reddy, Marjorie Sayre
Content preview from HTTP 완벽 가이드
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221
7
장 캐시
The Definitive Guide
$
나이
= $
문서가
_
우리의
_
캐시에
_
도착했을
_
때의
_
나이
+
$
사본이
_
얼마나
_
오래
_
우리의
_
캐시에
_
있었는지
;
나왔다! 이것이 바로 예 7-1에서 보았던 완전한 HTTP/1.1 나이 계산 알고리즘이
다. 이것은 더하기 빼기만 하면 되는 수준의 간단한 문제다. 우리는 언제 문서가 캐
시에 도착했는지 알고 있고(
$
응답을_받은_시각
) 언제 현재 요청이 도착했는지도 안다
(바로 지금). 따라서 체류시간은 정확히 둘의 차와 같다. 그림 7-18에서 이 모든 것
을 보여주고 있다.
서버
캐시된 문서의 나이
요청한_시각
날짜_값
응답을_받은_시각
클라이언트가_요청한_시각
현재_시각
요청의
네트워크
지연 서버가 처리하는 시간
응답의
네트워크
지연
캐시에 체류한 시간
캐시
클라이언트
그림
7
-
18
캐시된 문서의 나이는 네트워크와 캐시에서의 체류 시간을 포함한다.
7.11.4
신선도 수명 계산
캐시된 문서가 클라이언트에게 제공해주기에 충분히 신선한지 알아내려 시도하고
있다는 것을 상기하라. 이 질문에 답하기 위해, 우리는 캐시된 문서의 나이를 알아
내고 서버와 클라이언트의 제약조건에 따라 신선도 수명을 계산해야 한다. 우리는
직전까지 나이를 어떻게 계산하는지 설명했다. 그럼 이제는 신선도 수명에 대해 이
야기해보자.
어떤 문서의 신선도 수명은 문서가 특정 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.