Route Proxy Demo

This is a demo of a proof of concept feature published here and unlikely to get merged without major discussion. It was coded fully with Claude Opus 4.6

This app demonstrates vinext route proxies — proxy.ts files that intercept requests at each directory level, cascading from root to leaf.

Route-Level Proxies

• /about — Route proxy sets x-about-route-proxy header. Global middleware also runs, demonstrating coexistence.
• /proxy-test — Root proxy test (sets x-route-proxy-root header)
• /proxy-test/nested — Both root and nested proxies run, proving root-to-leaf cascade
• /proxy-test/blocked — Proxy blocks the request, returning 403 before page renders
• /proxy-test/rewrite-test — Proxy rewrites to /about (URL stays, content changes)
• /proxy-test/redirect-test — Proxy redirects to /about (302)
• /proxy-test/matcher-test — Proxy with config.matcher (only runs on this exact path)
• /proxy-test/matcher-test/excluded — Excluded from matcher: proxy does NOT run on this sub-path

Deep Nesting (8-Level Proxy Chain)

• /deeply/nested/route/with/proxy/at/each/level — 8 proxies cascade root-to-leaf, each setting a response header (x-proxy-deeply through x-proxy-level)

API Route Proxy

• /api/proxy-api-test — API route blocked by proxy before route handler executes (returns 403)

Global Middleware (Root proxy.ts)

• /middleware-redirect — Redirects to /about with a cookie
• /middleware-blocked — Returns 403 "Blocked by middleware"