From 1f1f0bd8b811740c84215f9ed4fa5ebd8309a990 Mon Sep 17 00:00:00 2001
From: slotThe <soliditsallgood@tuta.io>
Date: Thu, 9 Jan 2020 15:54:47 +0100
Subject: Use a single Manager across the whole application

---
 src/Xmobar/Plugins/Monitors/UVMeter.hs | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

(limited to 'src/Xmobar/Plugins/Monitors/UVMeter.hs')

diff --git a/src/Xmobar/Plugins/Monitors/UVMeter.hs b/src/Xmobar/Plugins/Monitors/UVMeter.hs
index 079177f..3756856 100644
--- a/src/Xmobar/Plugins/Monitors/UVMeter.hs
+++ b/src/Xmobar/Plugins/Monitors/UVMeter.hs
@@ -18,14 +18,14 @@ module Xmobar.Plugins.Monitors.UVMeter where
 import Xmobar.Plugins.Monitors.Common
 
 import qualified Control.Exception as CE
-import Network.HTTP.Conduit
-       (parseRequest, newManager, tlsManagerSettings, httpLbs,
-        responseBody)
+import Network.HTTP.Conduit (httpLbs, parseRequest, responseBody)
 import Data.ByteString.Lazy.Char8 as B
 import Text.Read (readMaybe)
 import Text.Parsec
 import Text.Parsec.String
 import Control.Monad (void)
+import Control.Monad.Reader (asks)
+import Data.IORef (readIORef)
 
 
 uvConfig :: IO MConfig
@@ -40,16 +40,18 @@ newtype UvInfo = UV { index :: String }
 uvURL :: String
 uvURL = "https://uvdata.arpansa.gov.au/xml/uvvalues.xml"
 
-getData :: IO String
-getData =
-  CE.catch (do request <- parseRequest uvURL
-               manager <- newManager tlsManagerSettings
-               res <- httpLbs request manager
-               return $ B.unpack $ responseBody res)
-           errHandler
-  where errHandler
-          :: CE.SomeException -> IO String
-        errHandler _ = return "<Could not retrieve data>"
+-- | Get the UV data from the given url.
+getData :: Monitor String
+getData = do
+    man <- io =<< readIORef <$> asks manager
+    io $ CE.catch
+        (do request <- parseRequest uvURL
+            res <- httpLbs request man
+            return $ B.unpack $ responseBody res)
+        errHandler
+  where
+    errHandler :: CE.SomeException -> IO String
+    errHandler _ = return "<Could not retrieve data>"
 
 textToXMLDocument :: String -> Either ParseError [XML]
 textToXMLDocument = parse document ""
@@ -73,7 +75,7 @@ getUVRating _ [] = Nothing
 runUVMeter :: [String] -> Monitor String
 runUVMeter [] = return "N.A."
 runUVMeter (s:_) = do
-    resp <- io getData
+    resp <- getData
     case textToXMLDocument resp of
         Right doc -> formatUVRating (getUVRating s doc)
         Left _ -> getConfigValue naString
-- 
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