module Tracker where
-import qualified Data.ByteString.Char8 as BC
-import qualified Data.Map as M
-import qualified Data.List as List
-import qualified Network.HTTP as HTTP
-import qualified Network.HTTP.Base as HB
-import qualified Bencode as Benc
-import qualified Crypto.Hash.SHA1 as SHA1
-import qualified Data.ByteString.Base16 as B16
-import qualified Utils as U
-import Data.Char
+import Prelude hiding (lookup)
+
+import Bencode (BVal(..), InfoDict, encode)
+import Crypto.Hash.SHA1 (hash)
+import Data.ByteString.Char8 (ByteString, pack, unpack)
+import Data.Char (chr)
+import Data.List (intercalate)
+import Data.Maybe (fromJust)
+import Data.Map as M (Map, (!))
+import Network.HTTP (simpleHTTP, defaultGETRequest_, getResponseBody)
+import Network.HTTP.Base (urlEncode)
+import Network.URI (parseURI)
+import Utils (splitN)
+import qualified Data.ByteString.Base16 as B16 (encode)
type Url = String
-- | urlEncodeHash
--
--- >>> urlEncodeHash $ BC.pack "123456789abcdef123456789abcdef123456789a"
--- "%124vx%9a%bc%de%f1%23Eg%89%ab%cd%ef%124Vx%9a"
-urlEncodeHash :: BC.ByteString -> String
-urlEncodeHash bs = concatMap (encode . BC.unpack) (U.splitN 2 bs)
- where encode b@[c1, c2] = let c = chr (read ("0x" ++ b))
- in
- escape c c1 c2
- encode _ = ""
+-- >>> urlEncodeHash $ pack "123456789abcdef123456789abcdef123456789a"
+-- "%124Vx%9a%bc%de%f1%23Eg%89%ab%cd%ef%124Vx%9a"
+urlEncodeHash :: ByteString -> String
+urlEncodeHash bs = concatMap (encode' . unpack) (splitN 2 bs)
+ where encode' b@[c1, c2] = let c = chr (read ("0x" ++ b))
+ in escape c c1 c2
+ encode' _ = ""
escape i c1 c2 | i `elem` nonSpecialChars = [i]
| otherwise = "%" ++ [c1] ++ [c2]
- where nonSpecialChars = ['A'..'Z'] ++
- ['a'..'z'] ++
- ['0'..'9'] ++
- "-_.~"
-infoHash :: M.Map Benc.BVal Benc.BVal -> BC.ByteString
-infoHash m = let info = m M.! Benc.Bstr (BC.pack "info")
- in (SHA1.hash . BC.pack . Benc.encode) info
+ nonSpecialChars = ['A'..'Z'] ++ ['a'..'z'] ++ ['0'..'9'] ++ "-_.~"
+
+infoHash :: Map BVal BVal -> ByteString
+infoHash m = let info = m ! Bstr (pack "info")
+ in (hash . pack . encode) info
-prepareRequest :: Benc.InfoDict -> String -> Integer -> String
+prepareRequest :: InfoDict -> String -> Integer -> String
prepareRequest d peer_id len =
let p = [("info_hash", urlEncodeHash ((B16.encode . infoHash) d)),
- ("peer_id", HB.urlEncode peer_id),
+ ("peer_id", urlEncode peer_id),
("port", "6881"),
("uploaded", "0"),
("downloaded", "0"),
("left", show len),
("compact", "1"),
("event", "started")]
- in
- List.intercalate "&" [f ++ "=" ++ s | (f,s) <- p]
+ in intercalate "&" [f ++ "=" ++ s | (f,s) <- p]
-connect :: Url -> String -> IO String
-connect baseurl qstr = let url = baseurl ++ "?" ++ qstr
- in HTTP.simpleHTTP (HTTP.getRequest url) >>=
- HTTP.getResponseBody
+connect :: Url -> String -> IO ByteString
+connect baseurl qstr = simpleHTTP (defaultGETRequest_ url) >>= getResponseBody
+ where url = fromJust . parseURI $ (baseurl ++ "?" ++ qstr)