From: Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
Date: Thu, 16 Jul 2015 08:32:11 +0000 (+0530)
Subject: Main.hs: move peer handling into Peer module
X-Git-Url: https://git.rkrishnan.org/Site/Content/Exhibitors/%22doc.html/using.html?a=commitdiff_plain;h=690290dc759dc20b7818a5c2f761afb94b2f80e5;p=functorrent.git

Main.hs: move peer handling into Peer module
---

diff --git a/src/FuncTorrent.hs b/src/FuncTorrent.hs
index 576e6b5..2cded5b 100644
--- a/src/FuncTorrent.hs
+++ b/src/FuncTorrent.hs
@@ -7,8 +7,7 @@ module FuncTorrent
      getTrackerResponse,
      decode,
      encode,
-     handShake,
-     msgLoop,
+     handlePeerMsgs,
      initLogger,
      logMessage,
      logStop,
diff --git a/src/FuncTorrent/Peer.hs b/src/FuncTorrent/Peer.hs
index d04d886..817a9cd 100644
--- a/src/FuncTorrent/Peer.hs
+++ b/src/FuncTorrent/Peer.hs
@@ -1,8 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module FuncTorrent.Peer
     (Peer(..),
-     handShake,
-     msgLoop
+     handlePeerMsgs
     ) where
 
 import Prelude hiding (lookup, concat, replicate, splitAt, empty, writeFile)
@@ -20,6 +19,7 @@ import Control.Applicative ((<$>), liftA3)
 import Data.Bits
 import Data.Word (Word8)
 
+import FuncTorrent.Metainfo (Info(..), Metainfo(..))
 type ID = String
 type IP = String
 type Port = Integer
@@ -178,3 +178,10 @@ msgLoop h pieceHash =
         putStrLn (show pieceList)
         -- download each of the piece in order
       _ -> putStrLn (show msg)
+
+handlePeerMsgs :: Peer -> Metainfo -> String -> (String -> IO ()) -> IO ()
+handlePeerMsgs p m peerId logFn = do
+  h <- handShake p (infoHash m) peerId
+  logFn $ "handShake"
+  msgLoop h (pieces (info m))
+  
diff --git a/src/Main.hs b/src/Main.hs
index f86e32c..8171d38 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -9,7 +9,7 @@ import System.Directory (doesFileExist)
 
 import FuncTorrent.Logger (initLogger, logMessage, logStop)
 import FuncTorrent.Metainfo (Info(..), Metainfo(..), torrentToMetainfo)
-import FuncTorrent.Peer (handShake, msgLoop)
+import FuncTorrent.Peer (handlePeerMsgs)
 import FuncTorrent.Tracker (peers, getTrackerResponse)
 
 logError :: String -> (String -> IO ()) -> IO ()
@@ -42,6 +42,7 @@ main = do
     log $ "Parsing arguments " ++ concat args
     torrentStr <- parse args
     case (torrentToMetainfo torrentStr) of
+     Left e -> logError e log
      Right m -> do
        log "Input File OK"
        log $ "Downloading file : " ++ name (info m)
@@ -50,12 +51,9 @@ main = do
        log $ "Trackers: " ++ head (announceList m)
        trackerResp <- getTrackerResponse m peerId
        case  trackerResp of
+        Left e -> log $ "Error" ++ unpack e
         Right peerList -> do
           log $ "Peers List : " ++ (show . peers $ peerList)
           let p1 = head (peers peerList)
-          h <- handShake p1 (infoHash m) peerId
-          log $ "handshake"
-          msgLoop h (pieces (info m))
-        Left e -> log $ "Error" ++ unpack e
-     Left e -> logError e log
+          handlePeerMsgs p1 m peerId log
     logStop logR