Debug add env var LEARNOCAML_SERVER_NOCACHE to disable all http caching

Author: AltGr

Makefile

@@ -57,7 +57,7 @@ testrun: build install
 	learn-ocaml build --repo $(REPO) -j1
 	rm -rf www/css
 	ln -s ../static/css www
-	learn-ocaml serve
+	LEARNOCAML_SERVER_NOCACHE=1 learn-ocaml serve
 
 docker-images: Dockerfile learn-ocaml.opam
 	@rm -rf docker

src/server/learnocaml_server.ml

@@ -86,7 +86,14 @@ type 'a response =
 
 type error = (Cohttp.Code.status_code * string)
 
-let caching: type resp. resp Api.request -> caching = function
+let disable_cache =
+  match Sys.getenv_opt "LEARNOCAML_SERVER_NOCACHE" with
+  | None | Some ("" | "0" | "false") -> false
+  | Some _ -> true
+
+let caching: type resp. resp Api.request -> caching = fun resp ->
+  if disable_cache then Nocache else
+  match resp with
   | Api.Version () -> Shortcache (Some ["version"; "server_id"])
   | Api.Static ("fonts"::_ | "icons"::_ | "js"::_::_::_ as p) -> Longcache p
   | Api.Static ("css"::_ | "js"::_ | _ as p) -> Shortcache (Some p)