From d0e391fb165ab23bb08dc02871747e0131c1e723 Mon Sep 17 00:00:00 2001
From: Dragos Boca <dragos.boca@oracle.com>
Date: Tue, 25 Aug 2015 13:37:23 +0300
Subject: define flag 'with_conduit'

---
 src/Plugins/Monitors/Weather.hs | 36 +++++++++++++++++++++++++++++++---
 xmobar.cabal                    | 43 ++++++++++++++++++++++++-----------------
 2 files changed, 58 insertions(+), 21 deletions(-)

diff --git a/src/Plugins/Monitors/Weather.hs b/src/Plugins/Monitors/Weather.hs
index 5f5fb6f..d458279 100644
--- a/src/Plugins/Monitors/Weather.hs
+++ b/src/Plugins/Monitors/Weather.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Plugins.Monitors.Weather
@@ -18,12 +19,14 @@ import Plugins.Monitors.Common
 
 import qualified Control.Exception as CE
 
+#ifdef HTTP_CONDUIT
 import Network.HTTP.Conduit
 import Network.HTTP.Types.Status
 import Network.HTTP.Types.Method
-
---import qualified Data.ByteString.Lazy as L
 import qualified Data.ByteString.Lazy.Char8 as B
+#else
+import Network.HTTP
+#endif
 
 import Text.ParserCombinators.Parsec
 
@@ -177,7 +180,8 @@ defUrl = "http://weather.noaa.gov/pub/data/observations/metar/decoded/"
 stationUrl :: String -> String
 stationUrl station = defUrl ++ station ++ ".TXT"
 
-getData:: String -> IO String
+getData :: String -> IO String
+#ifdef HTTP_CONDUIT
 getData station = CE.catch (do
     manager <- newManager tlsManagerSettings 
     request <- parseUrl $ stationUrl station
@@ -186,6 +190,13 @@ getData station = CE.catch (do
     ) errHandler
     where errHandler :: CE.SomeException -> IO String
           errHandler _ = return "<Could not retrieve data>"
+#else
+getData station = do
+    let request = getRequest (stationUrl station)
+    CE.catch (simpleHTTP request >>= getResponseBody) errHandler
+    where errHandler :: CE.IOException -> IO String
+          errHandler _ = return "<Could not retrieve data>"
+#endif
 
 formatWeather :: [WeatherInfo] -> Monitor String
 formatWeather [WI st ss y m d h (WindInfo wc wa wm wk) v sk tC tF dC dF r p] =
@@ -201,6 +212,7 @@ runWeather str =
        formatWeather i
 
 weatherReady :: [String] -> Monitor Bool
+#ifdef HTTP_CONDUIT
 weatherReady str = do
     initRequest <- parseUrl $ stationUrl $ head str
     let request = initRequest{method = methodHead}
@@ -214,3 +226,21 @@ weatherReady str = do
             | statusIsServerError status = False
             | statusIsClientError status = False
             | otherwise = True
+#else
+weatherReady str = do
+    let station = head str
+        request = headRequest (stationUrl station)
+    io $ CE.catch (simpleHTTP request >>= checkResult) errHandler
+    where errHandler :: CE.IOException -> IO Bool
+          errHandler _ = return False
+          checkResult result =
+            case result of
+                Left _ -> return False
+                Right response ->
+                    case rspCode response of
+                        -- Permission or network errors are failures; anything
+                        -- else is recoverable.
+                        (4, _, _) -> return False
+                        (5, _, _) -> return False
+                        (_, _, _) -> return True
+#endif
diff --git a/xmobar.cabal b/xmobar.cabal
index 9be6452..f8e8057 100644
--- a/xmobar.cabal
+++ b/xmobar.cabal
@@ -78,6 +78,10 @@ flag with_uvmeter
   description: UVMeter only useful to australians.
   default: False
 
+flag with_conduit
+  description: Use http-conduits for getting weather data
+  default: False
+  
 executable xmobar
     hs-source-dirs:     src
     main-is:            Main.hs
@@ -105,24 +109,27 @@ executable xmobar
     extra-libraries: Xrandr Xrender
 
     build-depends:
-                  base == 4.*,
-                  containers,
-                  regex-compat,
-                  process,
-                  old-locale,
-                  bytestring,
-                  directory,
-                  unix,
-                  time,
-                  filepath,
-                  transformers,
-                  http-conduit,
-                  http-types,
-                  X11 >= 1.6.1,
-                  mtl >= 2.1 && < 2.3,
-                  parsec == 3.1.*,
-                  HTTP >= 4000.2.4,
-                  stm >= 2.3 && < 2.5
+      base == 4.*,
+      containers,
+      regex-compat,
+      process,
+      old-locale,
+      bytestring,
+      directory,
+      unix,
+      time,
+      filepath,
+      transformers,
+      X11 >= 1.6.1,
+      mtl >= 2.1 && < 2.3,
+      parsec == 3.1.*,
+      HTTP >= 4000.2.4,
+      stm >= 2.3 && < 2.5
+
+    if flag(with_conduit)
+       -- use http-conduit  instead of simple-http
+       build-depends: http-conduit, http-types
+       cpp-options: -DHTTP_CONDUIT
 
     if flag(with_threaded)
        -- -threaded is a workaround for 100% CPU busy loop
-- 
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