avoid repeatedly parsing the proxy log

Annex/Proxy.hs

@@ -245,24 +245,23 @@ proxySpecialRemote protoversion r ihdl ohdl owaitv oclosedv = go
 {- Check if this repository can proxy for a specified remote uuid,
  - and if so enable proxying for it. -}
 checkCanProxy :: UUID -> UUID -> Annex Bool
-checkCanProxy remoteuuid ouruuid = checkCanProxy' remoteuuid ouruuid >>= \case
-	Right v -> do
-		Annex.changeState $ \st -> st { Annex.proxyremote = Just v }
-		return True
-	Left Nothing -> return False
-	Left (Just err) -> giveup err
+checkCanProxy remoteuuid ouruuid = do
+	ourproxies <- M.lookup ouruuid <$> getProxies
+	checkCanProxy' ourproxies remoteuuid >>= \case
+		Right v -> do
+			Annex.changeState $ \st -> st { Annex.proxyremote = Just v }
+			return True
+		Left Nothing -> return False
+		Left (Just err) -> giveup err
 
-checkCanProxy' :: UUID -> UUID -> Annex (Either (Maybe String) (Either ClusterUUID Remote))
-checkCanProxy' remoteuuid ouruuid = M.lookup ouruuid <$> getProxies >>= \case
-	Nothing -> return (Left Nothing)
-	-- This repository has (or had) proxying enabled. So it's
-	-- ok to display error messages that talk about proxies.
-	Just proxies ->
-		case filter (\p -> proxyRemoteUUID p == remoteuuid) (S.toList proxies) of
-			[] -> notconfigured
-			ps -> case mkClusterUUID remoteuuid of
-				Just cu -> proxyforcluster cu
-				Nothing -> proxyfor ps
+checkCanProxy' :: Maybe (S.Set Proxy) -> UUID -> Annex (Either (Maybe String) (Either ClusterUUID Remote))
+checkCanProxy' Nothing _ = return (Left Nothing)
+checkCanProxy' (Just proxies) remoteuuid =
+	case filter (\p -> proxyRemoteUUID p == remoteuuid) (S.toList proxies) of
+		[] -> notconfigured
+		ps -> case mkClusterUUID remoteuuid of
+			Just cu -> proxyforcluster cu
+			Nothing -> proxyfor ps
   where
 	-- This repository may have multiple remotes that access the same
 	-- repository. Proxy for the lowest cost one that is configured to

P2P/Http/State.hs

@@ -30,6 +30,7 @@ import Types.Cluster
 import CmdLine.Action (startConcurrency)
 import Utility.ThreadScheduler
 import Utility.HumanTime
+import Logs.Proxy
 import Annex.Proxy
 import Annex.Cluster
 import qualified P2P.Proxy as Proxy
@@ -188,12 +189,13 @@ withP2PConnections
 withP2PConnections workerpool proxyconnectionpoolsize clusterconcurrency a = do
 	enableInteractiveBranchAccess
 	myuuid <- getUUID
+	myproxies <- M.lookup myuuid <$> getProxies
 	reqv <- liftIO newEmptyTMVarIO
 	relv <- liftIO newEmptyTMVarIO
 	endv <- liftIO newEmptyTMVarIO
 	proxypool <- liftIO $ newTMVarIO (0, mempty)
 	asyncservicer <- liftIO $ async $
-		servicer myuuid proxypool reqv relv endv
+		servicer myuuid myproxies proxypool reqv relv endv
 	let endit = do
 		liftIO $ atomically $ putTMVar endv ()
 		liftIO $ wait asyncservicer
@@ -204,7 +206,7 @@ withP2PConnections workerpool proxyconnectionpoolsize clusterconcurrency a = do
 		atomically $ putTMVar reqv (connparams, respvar)
 		atomically $ takeTMVar respvar
 
-	servicer myuuid proxypool reqv relv endv = do
+	servicer myuuid myproxies proxypool reqv relv endv = do
 		reqrel <- liftIO $
 			atomically $ 
 				(Right <$> takeTMVar reqv)
@@ -214,25 +216,25 @@ withP2PConnections workerpool proxyconnectionpoolsize clusterconcurrency a = do
 				(Left . Left <$> takeTMVar endv)
 		case reqrel of
 			Right (connparams, respvar) -> do
-				servicereq myuuid proxypool relv connparams
+				servicereq myuuid myproxies proxypool relv connparams
 					>>= atomically . putTMVar respvar
-				servicer myuuid proxypool reqv relv endv
+				servicer myuuid myproxies proxypool reqv relv endv
 			Left (Right releaseconn) -> do
 				releaseconn
-				servicer myuuid proxypool reqv relv endv
+				servicer myuuid myproxies proxypool reqv relv endv
 			Left (Left ()) -> return ()
 	
-	servicereq myuuid proxypool relv connparams
+	servicereq myuuid myproxies proxypool relv connparams
 		| connectionServerUUID connparams == myuuid =
 			localConnection relv connparams workerpool
 		| otherwise =
 			atomically (getProxyConnectionPool proxypool connparams) >>= \case
 				Just conn -> proxyConnection proxyconnectionpoolsize relv connparams workerpool proxypool conn
-				Nothing -> checkcanproxy myuuid proxypool relv connparams
+				Nothing -> checkcanproxy myproxies proxypool relv connparams
 
-	checkcanproxy myuuid proxypool relv connparams = 
+	checkcanproxy myproxies proxypool relv connparams = 
 		inAnnexWorker' workerpool
-			(checkCanProxy' (connectionServerUUID connparams) myuuid)
+			(checkCanProxy' myproxies (connectionServerUUID connparams))
 		>>= \case
 			Right (Left reason) -> return $ Left $
 				ConnectionFailed $ 

doc/todo/git-annex_proxies.mdwn

@@ -28,9 +28,6 @@ Planned schedule of work:
 
 ## work notes
 
-* getProxies reads the proxy log every time, which is unncessarily slow.
-  memoize
-
 * An interrupted PUT to cluster that has a node that is a special remote
   over http leaves open the connection to the cluster, so the next request
   opens another one.