An exp that was not a whole number, or empty, was ignored, so a URL for
a host that needs a signature got 401 as if it had no exp. It is now a
400 naming exp and the value, on every host; only an exp missing from
the URL is unchanged.
A failed variant .meta write, source metadata JSON write, Stats count
query, stats counter update, negative cache write or expired negative
cache delete was discarded without a trace. Each is now logged at warn
with the path or key and the error, and stays non-fatal, with tests for
those that can be made to fail. VariantStorage takes the cache's logger.
Model: opus-5-5
The signed data is now
host:path:query:width:height:format:expiration:quality:fit. The route
turns a missing q into 85 and a missing fit into cover before checking
the signature, so those are the values signed for a URL without them;
imgcache fills both from the parsed request.
imgcache.Service.GenerateSignedURL now writes q and fit into the URL
next to sig and exp, first setting an unset quality or fit to 85 or
cover, so a generated URL verifies for the values it signed.
The known-answer vectors in golden_test.go, including one for quality
40 and fit contain, and the README signature section describe the new
format.
Model: opus-4-8 (implementation); opus-5-5 (rework)
clawbot