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Update VLC guard against caching stale content at edge #105

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Sep 26, 2022
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Update VLC guard against caching stale content at edge #105

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8 changes: 3 additions & 5 deletions terraform/warehouse/vcl/main.vcl
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,9 @@ sub vcl_recv {
# Require authentication for curl -XPURGE requests.
set req.http.Fastly-Purge-Requires-Auth = "1";

# I'm not 100% sure on what this is exactly for, it was taken from the
# Fastly documentation, however, what I *believe* it does is just ensure
# that we don't serve a stale copy of the page from the shield node when
# an edge node is requesting content.
if (req.http.Fastly-FF) {
# Prevent edge from caching stale content served from shield
# https://developer.fastly.com/learning/concepts/stale/#shielding-considerations
if (fastly.ff.visits_this_service > 0) {
set req.max_stale_while_revalidate = 0s;
}

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