cache: Key by depot path across CDN host aliases (#48)

Cache key from Path only; Host aliases share one entry. Closes #39.
2026-09-07 15:18:26 -05:00
parent 2c8ec276e7 337741e06e
commit 8eb31143e5
3 changed files with 143 additions and 3 deletions
@@ -89,6 +89,8 @@ curl -s -i http://localhost/lancache-heartbeat

 A first pass through new content is mostly misses (`hit_rate` near 0). Repeat the same content and `cache_hits` / `hit_rate` should rise.

+Cache entries are keyed by depot object path (not the CDN `Host` header), so when Steam rotates CDN hostnames for the same depot path, hits still climb across the aliases.
+
 Steam clients lean on Range requests. When an object is already cached, a Range GET is served locally as 206 from that full object (`range_cache`). On a Range miss the cache still fetches and stores the full upstream body, then returns the requested byte range as 206 (`range_upstream`).

 To confirm the process is up (HTTP 204 and `X-LanCache-Processed-By: SteamCache2`):