fix: ignore .woff2 and modern static-asset extensions#4
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marcin-prerender wants to merge 1 commit into
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fix: ignore .woff2 and modern static-asset extensions#4marcin-prerender wants to merge 1 commit into
marcin-prerender wants to merge 1 commit into
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The IGNORE_EXTENSIONS blocklists predate woff2. Suffix matching is exact on the final extension, so ".woff" does not cover ".woff2" — verified live: Googlebot requesting prerender.io's own inter-*.woff2 got a 504 (normal UA: 200) while .css/.js correctly bypassed. Adds .woff2, .otf, .eot, .webp, .avif to both workers per the integration contract (prerender/integration-contract#1), and removes the duplicate ".doc" entry in worker-subscriber.js. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
OpsBeaconCharles
approved these changes
Jun 12, 2026
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The bug
Both workers'
IGNORE_EXTENSIONSblocklists predate woff2. The filter does exact, case-insensitive matching on the final extension, so.woffdoes not cover.woff2. Bot requests for.woff2(and.otf,.eot,.webp,.avif) fonts/images were therefore routed toservice.prerender.ioinstead of being served directly — wasting renders and breaking asset delivery for crawlers.Live evidence
Verified against prerender.io itself: a Googlebot-UA request for
inter-*.woff2returns a 504 (normal UA: 200), while.css/.jscorrectly bypass Prerender and return 200 for both UAs.Contract
Canonical change to the static-asset ignore list: prerender/integration-contract#1 — the contract list (case-insensitive suffix matching) now includes
.woff2 .otf .eot .webp .avif .webmanifest.Changes
worker-subscriber.js: added.woff2,.otf,.eot,.webp,.aviftoIGNORE_EXTENSIONS; removed the duplicate.docentry (.webmanifestwas already present).worker-custom-domain.js: added the same five extensions.No logic changes; both workers already lowercase the pathname/extension before comparison. Validated with
node --check.🤖 Generated with Claude Code