Enable cache for 1 hour for static assets

access.lua

@@ -150,7 +150,13 @@ then
                and (not ngx.var.http_referer
                     or hlp.string.starts(ngx.var.http_referer, conf.portal_url)))
         then
+            -- If this is an asset, enable caching
+            if hlp.string.starts(ngx.var.uri, conf["portal_path"].."assets")
+            then
+               return hlp.serve(ngx.var.uri, "static_asset")
+            else
                return hlp.serve(ngx.var.uri)
+            end
 
 
         -- If all the previous cases have failed, redirect to portal
@@ -318,7 +324,7 @@ end
 
 function serveAsset(shortcut, full)
   if string.match(ngx.var.uri, "^"..shortcut.."$") then
-      hlp.serve("/yunohost/sso/assets/"..full)
+      hlp.serve("/yunohost/sso/assets/"..full, "static_asset")
   end
 end
 

helpers.lua

@@ -437,7 +437,7 @@ end
 --
 -- Takes an URI, and returns file content with the proper HTTP headers.
 -- It is used to render the SSOwat portal *only*.
-function serve(uri)
+function serve(uri, cache)
     rel_path = string.gsub(uri, conf["portal_path"], "/")
 
     -- Load login.html as index
@@ -505,8 +505,12 @@ function serve(uri)
     flashs["win"] = nil
     flashs["info"] = nil
 
+    if cache == "static_asset" then
+        ngx.header["Cache-Control"] = "public, max-age=3600"
+    else
         -- Ain't nobody got time for cache
         ngx.header["Cache-Control"] = "no-cache"
+    end
 
     -- Print file content
     ngx.say(content)