Handle error cases from the tracker

[functorrent.git] / src / Main.hs

diff --git a/src/Main.hs b/src/Main.hs
index b8afb0e830a25853d37632e250633055f814cd53..77573313b61cc4d8c5a9da80a365321687aa64ca 100644 (file)
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,17 +1,18 @@
+{-# LANGUAGE OverloadedStrings #-}
 module Main where
 
-import Prelude hiding (length, readFile)
-
-import Bencode (decode, BVal(..))
-import Data.ByteString.Char8 as BC (ByteString, pack, length, readFile, length)
-import Data.Functor ((<$>))
-import Metainfo (announce, lengthInBytes, mkMetaInfo, info)
-import Peer (getPeers, getPeerResponse, handShakeMsg)
+import Prelude hiding (length, readFile, writeFile)
+import Data.ByteString.Char8 (ByteString, readFile, writeFile, length, unpack)
 import System.Environment (getArgs)
 import System.Exit (exitSuccess)
-import Tracker (connect, prepareRequest)
+import System.Directory (doesFileExist)
 import Text.ParserCombinators.Parsec (ParseError)
-import Logger
+
+import FuncTorrent.Bencode (decode, BVal(..))
+import FuncTorrent.Logger (initLogger, logMessage, logStop)
+import FuncTorrent.Metainfo (announce, lengthInBytes, mkMetaInfo, info, name)
+import FuncTorrent.Peer (peers, mkPeerResp, handShakeMsg)
+import FuncTorrent.Tracker (connect, prepareRequest)
 
 logError :: ParseError -> (String -> IO ()) -> IO ()
 logError e logMsg = logMsg $ "parse error: \n" ++ show e
@@ -27,7 +28,11 @@ usage = putStrLn "usage: functorrent torrent-file"
 
 parse :: [String] -> IO ByteString
 parse [] = usage >> exit
-parse [a] = readFile a
+parse [a] = do
+  fileExist <- doesFileExist a
+  if fileExist
+    then readFile a
+    else error "file does not exist"
 parse _ = exit
 
 main :: IO ()
@@ -46,16 +51,23 @@ main = do
 
               let len = lengthInBytes $ info m
                   (Bdict d') = d
-              
+
               logMsg "Trying to fetch peers: "
+              response <- connect (announce m) (prepareRequest d' peerId len)
 
-              body <- pack <$> connect (announce m) (prepareRequest d' peerId len)
-              
-              let peerResponse = show $ getPeers $ getPeerResponse body
-              logMsg $ "Peers List : " ++ peerResponse
-              
               let hsMsgLen = show $ length $ handShakeMsg d' peerId
               logMsg $ "Hand-shake message length : " ++ hsMsgLen
 
+              -- TODO: Write to ~/.functorrent/caches
+              writeFile (name (info m) ++ ".cache") response
+
+              case decode response of
+                Right trackerInfo ->
+                    case mkPeerResp trackerInfo of
+                      Right peerResp ->
+                          logMsg $ "Peers List : " ++ (show . peers $ peerResp)
+                      Left e -> logMsg $ "Error" ++ unpack e
+                Left e -> logError e logMsg
+
       Left e -> logError e logMsg
     logStop logR