+{-# 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 (log, length, readFile, getContents)
+import Data.ByteString.Char8 (ByteString, getContents, readFile, unpack)
import System.Environment (getArgs)
import System.Exit (exitSuccess)
-import Tracker (connect, prepareRequest)
-import Text.ParserCombinators.Parsec (ParseError)
-import Logger
+import System.Directory (doesFileExist)
+
+import FuncTorrent.Logger (initLogger, logMessage, logStop)
+import FuncTorrent.Metainfo (Info(..), Metainfo(..), torrentToMetainfo)
+import FuncTorrent.Peer (handlePeerMsgs)
+import FuncTorrent.Tracker (peers, getTrackerResponse)
-printError :: ParseError -> Logger -> IO ()
-printError e l = logMessage l $ "parse error: \n" ++ show e
+logError :: String -> (String -> IO ()) -> IO ()
+logError e logMsg = logMsg $ "parse error: \n" ++ e
peerId :: String
peerId = "-HS0001-*-*-20150215"
usage = putStrLn "usage: functorrent torrent-file"
parse :: [String] -> IO ByteString
-parse [] = usage >> exit
-parse [a] = readFile a
+parse [] = getContents
+parse [a] = do
+ fileExist <- doesFileExist a
+ if fileExist
+ then readFile a
+ else error "file does not exist"
parse _ = exit
main :: IO ()
main = do
args <- getArgs
logR <- initLogger
- logMessage logR $ "Starting parsing input file: " ++ (concat args)
+ let log = logMessage logR
+ log "Starting up functorrent"
+ log $ "Parsing arguments " ++ concat args
torrentStr <- parse args
- case decode torrentStr of
- Right d ->
- case mkMetaInfo d of
- Nothing -> logMessage logR "parse error"
- Just m -> do
- let len = lengthInBytes $ info m
- (Bdict d') = d
- body <- pack <$> connect (announce m) (prepareRequest d' peerId len)
-
- let peerResponse = show $ getPeers $ getPeerResponse body
- logMessage logR $ "Peers List : " ++ peerResponse
-
- let hsMsgLen = show $ length $ handShakeMsg d' peerId
- logMessage logR $ "Hand-shake message length : " ++ hsMsgLen
-
- Left e -> printError e logR
+ case torrentToMetainfo torrentStr of
+ Left e -> logError e log
+ Right m -> do
+ log "Input File OK"
+ log $ "Downloading file : " ++ name (info m)
+ log "Trying to fetch peers"
+
+ 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)
+ handlePeerMsgs p1 m peerId
logStop logR