# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1612300580 -3600
# Node ID 8cb2a64b15da750e70f8a880d01d076f8589e781
# Parent  43e5429ab35593470dba477587e502e4f49706b4
mod_http_file_share: Collect cache hit/miss statistics for downloads

diff -r 43e5429ab355 -r 8cb2a64b15da plugins/mod_http_file_share.lua
--- a/plugins/mod_http_file_share.lua	Tue Feb 02 22:11:53 2021 +0100
+++ b/plugins/mod_http_file_share.lua	Tue Feb 02 22:16:20 2021 +0100
@@ -274,6 +274,9 @@
 
 end
 
+local download_cache_hit = module:measure("download_cache_hit", "rate");
+local download_cache_miss = module:measure("download_cache_miss", "rate");
+
 function handle_download(event, path) -- GET /uploads/:slot+filename
 	local request, response = event.request, event.response;
 	local slot_id = path:match("^[^/]+");
@@ -281,7 +284,7 @@
 	local cached = upload_cache:get(slot_id);
 	if cached then
 		module:log("debug", "Cache hit");
-		-- TODO stats (instead of logging?)
+		download_cache_hit();
 		basename = cached.name;
 		filesize = cached.size;
 		filetype = cached.type;
@@ -290,6 +293,7 @@
 		-- TODO cache negative hits?
 	else
 		module:log("debug", "Cache miss");
+		download_cache_miss();
 		local slot, when = errors.coerce(uploads:get(nil, slot_id));
 		if not slot then
 			module:log("debug", "uploads:get(%q) --> not-found, %s", slot_id, when);