All API routes serve static content that only changes at deploy time, but had
0% cache hit rate. Adding s-maxage=86400 lets Vercel's CDN cache responses at
the edge, which should take the ~28K daily API requests from 0% to ~99% cache.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add shared validation helper (server/lib/validation.js) with ID regex, provider/type allowlists
- Validate all route params against allowlists before filesystem operations to prevent path traversal
- Strip stack traces and error.message from production error responses (generic "Internal server error")
- Sanitize filenames in Content-Disposition headers
- Add X-Content-Type-Options: nosniff and X-Frame-Options: DENY to dev server static responses
- Add path traversal (.. ) checks to all static file handlers and catch-all fetch
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This endpoint was in the local server but missing from Vercel serverless
functions, causing "Source not available" on the deployed site.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Paul BakausandClaude Opus 4.6