comet/deployment/cloudflare-cache-rules.md

Cloudflare Configuration

To optimize performance, configure Cloudflare to offload traffic from your server. We use Cache Rules to cache responses while respecting the application's cache headers.

1. Streams (Cache Rule)

Cache all stream results (public and private). Comet controls the TTL via headers.

• Rule Name: Streams
• Expression: (http.request.uri.path contains "/stream/")
• Action: Eligible for Cache
• Edge TTL: Use cache-control header if present (first option)
• Browser TTL: Respect origin
• Serve stale content while revalidating: On

2. Configure Page (Cache Rule)

Cache the configuration page.

• Rule Name: Configure Page
• Expression: (http.request.uri.path eq "/configure")
• Action: Eligible for Cache
• Edge TTL: Use cache-control header if present (first option)
• Browser TTL: Respect origin

3. Tiered Cache

Enable Tiered Cache in Caching > Tiered Cache. This minimizes requests to your origin by checking other Cloudflare datacenters first.

4. Network Optimizations

In Speed > Protocol:

• HTTP/3 (QUIC): On (faster connections, especially on mobile)
• 0-RTT Connection Resumption: On (reduces latency for repeat visitors)