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#ETAG

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Anthony Accioly<p>Quick question for folks who understand HTTP caching on reverse proxies like Squid or Cloudflare. If I have a GET REST endpoint responding with 200 OK and the following headers:</p><p>Cache-Control: public, max-age=3600&nbsp;&nbsp;<br>ETag: "123-a"</p><p>The proxy should cache and serve the response without hitting the underlying server more than once for the first hour, then send a request with If-Match: "123-a" when the cache goes stale, right? Is there any reason why it wouldn’t?</p><p><a href="https://accioly.social/tags/http" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>http</span></a> <a href="https://accioly.social/tags/caching" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>caching</span></a> <a href="https://accioly.social/tags/etag" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>etag</span></a> <a href="https://accioly.social/tags/rest" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rest</span></a> <a href="https://accioly.social/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tech</span></a></p>
𝕂𝚞𝚋𝚒𝚔ℙ𝚒𝚡𝚎𝚕<p>»Understanding Cache-Control and ETag for efficient web caching«</p><p>Cookies that are not called such ;) no seriously it is helpful but unfortunately also abused as a cookie tracking alternative.</p><p>🧑‍💻 <a href="https://dev.to/andreasbergstrom/understanding-cache-control-and-etag-for-efficient-web-caching-2nf5" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dev.to/andreasbergstrom/unders</span><span class="invisible">tanding-cache-control-and-etag-for-efficient-web-caching-2nf5</span></a></p><p><a href="https://chaos.social/tags/webdev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>webdev</span></a> <a href="https://chaos.social/tags/http" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>http</span></a> <a href="https://chaos.social/tags/caching" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>caching</span></a> <a href="https://chaos.social/tags/webperf" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>webperf</span></a> <a href="https://chaos.social/tags/https" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>https</span></a> <a href="https://chaos.social/tags/etag" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>etag</span></a> <a href="https://chaos.social/tags/cookies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cookies</span></a> <a href="https://chaos.social/tags/control" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>control</span></a></p>
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