util.sasl: Cache the calculated mechanisms set for SASL profiles (profile.mechanisms table).
--- a/util/sasl.lua Tue Dec 28 09:59:27 2010 +0500
+++ b/util/sasl.lua Wed Dec 29 18:45:31 2010 +0500
@@ -48,13 +48,17 @@
-- create a new SASL object which can be used to authenticate clients
function new(realm, profile)
- local mechanisms = {};
- for backend, f in pairs(profile) do
- if backend_mechanism[backend] then
- for _, mechanism in ipairs(backend_mechanism[backend]) do
- mechanisms[mechanism] = true;
+ local mechanisms = profile.mechanisms;
+ if not mechanisms then
+ mechanisms = {};
+ for backend, f in pairs(profile) do
+ if backend_mechanism[backend] then
+ for _, mechanism in ipairs(backend_mechanism[backend]) do
+ mechanisms[mechanism] = true;
+ end
end
end
+ profile.mechanisms = mechanisms;
end
return setmetatable({ profile = profile, realm = realm, mechs = mechanisms }, method);
end