Python Web Apps that Fly with CDNs Transcripts
Chapter: Avoiding Stale Caches
Lecture: Remember vary by in the CDN
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Do you remember when we set up the URL pull zone for our static files and I said,
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"Let's go through the caching section and it's really important that you check URL query string
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as one of the vary by options." I believe that was off by default on this one. I said,
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"In order for stuff to work that we're going to do later in the course, you have to click URL
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query string as one of the ways in which things could be considered as a separate file."
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and then we're gonna save that configure it you know make sure you press save
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that configuration right this trick we did with the cache ID if you don't have this checked well it's kind of say query string change but we're not
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supposed to treat those things as separate so same file and same still cache problem so we talked about this before but it might not have clicked on
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like well why does that matter this this thing we just did to allow for us to
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make changes to CSS, JavaScript, image, and other static files, and instantly,
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without any effort on our part, have those changes all the way through the
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infrastructure stack, it's that little green checkbox right there. So make sure you've got that set if you're going to use this technique.