fix(maps): bypass CF edge cache for OFM proxy + tile probe diagnostic - #180
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Promote to production: map explorer tile loading diagnostics
Promote to production: fix blank map tiles via OFM proxy
Promote to production: absolute OFM proxy URLs
Promote to production: Clipboard Inspector tool
Promote to production: transformRequest OFM proxy fix
…stic
The Worker was fetching OFM tile URLs with cf:{cacheEverything:true}, which
caused it to serve corrupted responses cached by Cloudflare's Singapore edge
node (HTTP 200 but invalid PBF body). Removing cacheEverything forces the
Worker to fetch direct from OFM origin via CF backbone, skipping the stale
edge cache entries.
Also adds a one-shot tile probe in MapExplorer that logs the status, content-
type, size, and first 8 bytes of a sample tile — so the next test immediately
reveals whether the response is valid PBF or corrupted data.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Root cause
The Worker's OFM proxy used
cf: { cacheEverything: true, cacheTtl: 86400 }on its upstream fetch. This caused Cloudflare's Singapore edge to serve cached responses fortiles.openfreemap.org/planet/.../*.pbf— the same corrupted edge cache entries that were breaking tile loading for Southeast Asia users in the first place.ne2_shadedPNG tiles worked because those cache entries happened to be clean (or absent). Vector PBF tiles had corrupted cached responses at that edge node, coming back as HTTP 200 with wrong body content, which MapLibre silently retried forever.Fix
cf: { cacheEverything }from the Worker's OFM fetch so it goes directly to OFM origin via CF backbone, bypassing the stale edge cache.🤖 Generated with Claude Code