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fix(analytics): use greedy regex in PostHog ingest rewrites#481

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fix/posthog-ingest-rewrite
Feb 27, 2026
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fix(analytics): use greedy regex in PostHog ingest rewrites#481
koala73 merged 1 commit into
mainfrom
fix/posthog-ingest-rewrite

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@koala73

@koala73 koala73 commented Feb 27, 2026

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Summary

  • Fix PostHog /ingest/* 404 errors by switching Vercel rewrite patterns from :path* to :path(.*)
  • Vercel's :path* wildcard silently fails on trailing slashes that PostHog SDK appends (e.g. /ingest/s/?compression=...)
  • Known Vercel issue: Vercel reverse proxy not working PostHog/posthog#17596

Test plan

  • Deploy to preview, confirm PostHog events reach us.i.posthog.com (no 404s in browser console)
  • Verify /ingest/static/* assets still load (PostHog JS bundle)
  • Check PostHog dashboard for incoming events after deploy

@koala73
fix(analytics): use greedy regex in PostHog ingest rewrites
e992937 
Vercel's :path* wildcard doesn't match trailing slashes that
PostHog SDK appends (e.g. /ingest/s/?compression=...), causing 404s.
Switch to :path(.*) which matches all path segments including
trailing slashes. Ref: PostHog/posthog#17596
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@koala73
koala73 merged commit 0e10195 into main Feb 27, 2026
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@koala73 koala73 mentioned this pull request Feb 27, 2026
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@koala73
koala73 deleted the fix/posthog-ingest-rewrite branch February 27, 2026 20:51
koala73 added a commit that referenced this pull request Mar 1, 2026
@koala73
fix(analytics): use greedy regex in PostHog ingest rewrites (#481)
d191477 
Vercel's :path* wildcard doesn't match trailing slashes that
PostHog SDK appends (e.g. /ingest/s/?compression=...), causing 404s.
Switch to :path(.*) which matches all path segments including
trailing slashes. Ref: PostHog/posthog#17596
koala73 added a commit that referenced this pull request Mar 1, 2026
@koala73 @SebastienMelki
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