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0f0540549dbdc6f26b3dafe94ba1cdaa1f18e8b7
opds-proxy/go.sum
Evan Buss 0f0540549d feat: request deduplication / debouncing 
Kobo eReaders have a buggy browser that makes 2 requests for
the same HTTP resource when you click a link.

This change ensures that requests within a certain time frame
from the same IP, for the same path  / query params will only
be executed a single time.

We record the http request response and replay it for the second
request. If we get 2 simultaneous requests, we use the
sync/singleflight library to ensure only the first request is actually
processed. The second waits for the shared result of the first.

This probably adds latency since some requests are blocked while
we determine if we already have a cache entry, but for a simple
service like this I don't think it matters.
2024-08-18 18:37:42 +00:00

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