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Questions tagged [etags]

Entity tags (ETags) are a mechanism that web servers and browsers use to determine whether the component in the browser's cache matches the one on the origin server.

Entity tags (ETags) are a mechanism that web servers and browsers use to determine whether the component in the browser's cache matches the one on the origin server. ETags were added to provide a mechanism for validating entities that is more flexible than the last-modified date.

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Apache Etags, need help?

We do not currently use Expire headers, I was going to recommend it but forcing our large development team/business to change their practices and rename static files with each new release isn't going to be easy to get updated files. I ran YSlow and…
roacha
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How to configure entity tags (ETags) on IIS 8.5?

YSlow is complaining about some images with misconfigured ETags, I found some articles and followed the instructions, but it is still not working for me in IIS 8.5 Any idea what is the right way to ADD eTags or how to add a Rewrite Rule that can do…
Yovav
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Prompt server for Etag or MD5

We are a price comparison portal and crawl certain websites on a regular basis. I am looking for a method to save bandwidth by avoiding downloading the same page over and over again if the content did not change and instead make only a head request.…
Radu M.
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How to generate ETag for HTML (full page) content in Varnish?

I want to configure Varnish to generate ETag of HTML requested content (maybe with MD5 of HTML and "Vary" headers) and to deal with 304 and If-None-Match headers. Is this possible with configuration or vlc scripting?
damian
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Do ETags generated on upstream need If-None-Match check? (Nginx)

Let's assume I use etag off (and if_modified_since off with add_header Last-Modified "" to not make redundancy) in Nginx and I generate ETags on upstream. Do I then need a check for If-None-Match on upstream or does the Nginx's own one will work? I…
Levi Pesin
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