Migrated project to cabal

1 files changed, 58 insertions, 0 deletions

diff --git a/app/Main.hs b/app/Main.hs
new file mode 100644
index 0000000..433ad8d
--- /dev/null
+++ b/app/Main.hs
@@ -0,0 +1,58 @@
+module Main (main) where
+
+import Control.Concurrent (forkFinally)
+import qualified Control.Exception as E
+import Control.Monad (unless, forever, void)
+
+import qualified Data.ByteString as S
+import qualified Data.Text as T
+import Data.Text.Encoding (decodeUtf8, encodeUtf8)
+
+import Network.Socket
+import Network.Socket.ByteString (recv, sendAll)
+
+import Web.Utils
+import Web.Response
+import Web.Router
+import Routes
+
+import Settings (host, port)
+
+main :: IO ()
+main = do
+  let hostStr = case host of
+                  Just smt -> smt
+                  Nothing  -> "0.0.0.0"
+
+  putStrLn $ "Server launched on " ++ hostStr ++ ":" ++ port
+  runTCPServer host port talk
+  where
+    talk s = do
+      msg <- recv s 1024
+      putStrLn "Got request"
+      unless (S.null msg) $ do
+        let (request, _, _) = parseHttp $ decodeUtf8 msg
+        response <- resolve routesTable $ request
+        sendAll s $ encodeUtf8 (formResponse response)
+
+runTCPServer :: Maybe HostName -> ServiceName -> (Socket -> IO a) -> IO a
+runTCPServer mhost port server = withSocketsDo $ do
+    addr <- resolve
+    E.bracket (open addr) close loop
+  where
+    resolve = do
+        let hints = defaultHints {
+                addrFlags = [AI_PASSIVE]
+              , addrSocketType = Stream
+              }
+        head <$> getAddrInfo (Just hints) mhost (Just port)
+    open addr = do
+        sock <- socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr)
+        setSocketOption sock ReuseAddr 1
+        withFdSocket sock $ setCloseOnExecIfNeeded
+        bind sock $ addrAddress addr
+        listen sock 1024
+        return sock
+    loop sock = forever $ do
+        (conn, _peer) <- accept sock
+        void $ forkFinally (server conn) (const $ gracefulClose conn 5000)