clawbot 049a051596 Check cached sources with upstream after the cache TTL (closes #69) ...

A cached source and its variants were served until eviction, so a
changed image at the same URL was never picked up.

After 24 hours a request checks the source with upstream, sending its
stored ETag and Last-Modified. A 304 renews the source with no download
or conversion. New bytes replace the source, and older variants are
converted again. A failed check serves the cached image and puts the
URL in the negative cache. This includes the full fetch made for a
variant whose source was evicted. Images not checked for 30 days are
evicted.

A variant file's modification time is its source's check time, so a
hit still makes no database call.

Model: opus-5-5

2026-11-11 09:53:04 +00:00

..

auth_clientip_internal_test.go

Resolve real client IP behind trusted proxies (closes #94)

2026-09-22 10:25:41 +02:00

auth_csrf_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

auth_generate_internal_test.go

One image request type instead of five (closes #307)

2026-10-21 14:41:07 +02:00

auth_login_log_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

auth_session_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

auth.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00

avif_too_large_internal_test.go

Serve both image routes with one function and one error mapping (closes #316)

2026-10-26 15:24:24 +01:00

bodylimit_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

bodylimit.go

Harden http.Server: slowloris timeouts and form body limit (closes #92)

2026-09-21 20:59:24 +02:00

cache_hit_internal_test.go

Split internal/imgcache into the image proxy and the cache (closes #317)

2026-10-26 20:00:25 +01:00

client_gone_internal_test.go

Check cached sources with upstream after the cache TTL (closes #69)

2026-11-11 09:53:04 +00:00

csrf.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

first_bytes_internal_test.go

Split internal/imgcache into the image proxy and the cache (closes #317)

2026-10-26 20:00:25 +01:00

format_auto_internal_test.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00

format_auto.go

Detect a fetched image's format from its bytes once (closes #319)

2026-10-26 21:21:39 +01:00

handlers_internal_test.go

Check cached sources with upstream after the cache TTL (closes #69)

2026-11-11 09:53:04 +00:00

handlers.go

Split internal/imgcache into the image proxy and the cache (closes #317)

2026-10-26 20:00:25 +01:00

healthcheck.go

Add doc comment to HandleHealthCheck method

2026-01-08 02:28:30 -08:00

image_cache_control_internal_test.go

Split internal/imgcache into the image proxy and the cache (closes #317)

2026-10-26 20:00:25 +01:00

image_errors_internal_test.go

Check cached sources with upstream after the cache TTL (closes #69)

2026-11-11 09:53:04 +00:00

image_signature_internal_test.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00

image.go

Answer 499 to a client that goes away while waiting for an image (closes #339)

2026-10-26 23:37:35 +00:00

imageenc_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

imageenc_token_internal_test.go

Derive every key from the signing key in one place (closes #315)

2026-10-26 14:10:20 +01:00

imageenc.go

Serve both image routes with one function and one error mapping (closes #316)

2026-10-26 15:24:24 +01:00

jpegxl_default_internal_test.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00

jpegxl_internal_test.go

One image request type instead of five (closes #307)

2026-10-21 14:41:07 +02:00

referer_blocklist_internal_test.go

Check cached sources with upstream after the cache TTL (closes #69)

2026-11-11 09:53:04 +00:00

request_id_internal_test.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00

robots_healthcheck_internal_test.go

Test the image route's signature check and error answers (closes #76)

2026-10-04 13:58:29 +02:00

server_busy_internal_test.go

Split internal/imgcache into the image proxy and the cache (closes #317)

2026-10-26 20:00:25 +01:00

unsupported_source_internal_test.go

Detect a fetched image's format from its bytes once (closes #319)

2026-10-26 21:21:39 +01:00

validate_signature_internal_test.go

Take the signature, the expiry and the URL scheme off the image request (closes #314)

2026-10-26 13:49:12 +01:00