Format with hindent

10 files changed, 694 insertions, 639 deletions

diff --git a/src/Sproxy/Application.hs b/src/Sproxy/Application.hs
index 791e59c..3311f05 100644
--- a/src/Sproxy/Application.hs
+++ b/src/Sproxy/Application.hs
@@ -1,14 +1,17 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
-module Sproxy.Application (
-  sproxy
-, redirect
-) where
+
+module Sproxy.Application
+  ( sproxy
+  , redirect
+  ) where
 
 import Blaze.ByteString.Builder (toByteString)
 import Blaze.ByteString.Builder.ByteString (fromByteString)
-import Control.Exception (Exception, Handler(..), SomeException, catches, displayException)
+import Control.Exception
+       (Exception, Handler(..), SomeException, catches, displayException)
+import qualified Data.Aeson as JSON
 import Data.ByteString (ByteString)
 import Data.ByteString as BS (break, intercalate)
 import Data.ByteString.Char8 (pack, unpack)
@@ -16,7 +19,8 @@ import Data.ByteString.Lazy (fromStrict)
 import Data.Conduit (Flush(Chunk), mapOutput)
 import Data.HashMap.Strict as HM (HashMap, foldrWithKey, lookup)
 import Data.List (find, partition)
-import Data.Map as Map (delete, fromListWith, insert, insertWith, toList)
+import Data.Map as Map
+       (delete, fromListWith, insert, insertWith, toList)
 import Data.Maybe (fromJust, fromMaybe)
 import Data.Monoid ((<>))
 import Data.Text (Text)
@@ -25,34 +29,38 @@ import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
 import Data.Word (Word16)
 import Data.Word8 (_colon)
 import Foreign.C.Types (CTime(..))
+import qualified Network.HTTP.Client as BE
 import Network.HTTP.Client.Conduit (bodyReaderSource)
-import Network.HTTP.Conduit (requestBodySourceChunkedIO, requestBodySourceIO)
-import Network.HTTP.Types (RequestHeaders, ResponseHeaders, methodGet, methodPost)
-import Network.HTTP.Types.Header ( hConnection,
-  hContentLength, hContentType, hCookie, hLocation, hTransferEncoding )
-import Network.HTTP.Types.Status ( Status(..), badGateway502, badRequest400, forbidden403,
-  found302, internalServerError500, methodNotAllowed405, movedPermanently301,
-  networkAuthenticationRequired511, notFound404, ok200, seeOther303, temporaryRedirect307 )
+import Network.HTTP.Conduit
+       (requestBodySourceChunkedIO, requestBodySourceIO)
+import Network.HTTP.Types
+       (RequestHeaders, ResponseHeaders, methodGet, methodPost)
+import Network.HTTP.Types.Header
+       (hConnection, hContentLength, hContentType, hCookie, hLocation,
+        hTransferEncoding)
+import Network.HTTP.Types.Status
+       (Status(..), badGateway502, badRequest400, forbidden403, found302,
+        internalServerError500, methodNotAllowed405, movedPermanently301,
+        networkAuthenticationRequired511, notFound404, ok200, seeOther303,
+        temporaryRedirect307)
 import Network.Socket (NameInfoFlag(NI_NUMERICHOST), getNameInfo)
-import Network.Wai.Conduit (sourceRequestBody, responseSource)
+import qualified Network.Wai as W
+import Network.Wai.Conduit (responseSource, sourceRequestBody)
 import System.FilePath.Glob (Pattern, match)
 import System.Posix.Time (epochTime)
 import Text.InterpolatedString.Perl6 (qc)
 import Web.Cookie (Cookies, parseCookies, renderCookies)
-import qualified Data.Aeson as JSON
-import qualified Network.HTTP.Client as BE
-import qualified Network.Wai as W
 import qualified Web.Cookie as WC
 
-import Sproxy.Application.Cookie ( AuthCookie(..), AuthUser,
-  cookieDecode, cookieEncode, getEmail, getEmailUtf8, getFamilyNameUtf8,
-  getGivenNameUtf8 )
+import Sproxy.Application.Cookie
+       (AuthCookie(..), AuthUser, cookieDecode, cookieEncode, getEmail,
+        getEmailUtf8, getFamilyNameUtf8, getGivenNameUtf8)
 import Sproxy.Application.OAuth2.Common (OAuth2Client(..))
-import Sproxy.Config(BackendConf(..))
-import Sproxy.Server.DB (Database, userAccess, userExists, userGroups)
 import qualified Sproxy.Application.State as State
+import Sproxy.Config (BackendConf(..))
 import qualified Sproxy.Logging as Log
-
+import Sproxy.Server.DB
+       (Database, userAccess, userExists, userGroups)
 
 redirect :: Word16 -> W.Application
 redirect p req resp =
@@ -61,151 +69,182 @@ redirect p req resp =
     Just domain -> do
       Log.info $ "redirecting to " ++ show location ++ ": " ++ showReq req
       resp $ W.responseBuilder status [(hLocation, location)] mempty
-      where
-        status = if W.requestMethod req == methodGet then movedPermanently301 else temporaryRedirect307
-        newhost = if p == 443 then domain else domain <> ":" <> pack (show p)
-        location = "https://" <> newhost <> W.rawPathInfo req <> W.rawQueryString req
-
-
-sproxy :: ByteString -> Database -> HashMap Text OAuth2Client -> [(Pattern, BackendConf, BE.Manager)] -> W.Application
-sproxy key db oa2 backends = logException $ \req resp -> do
-  Log.debug $ "sproxy <<< " ++ showReq req
-  case requestDomain req of
-    Nothing -> badRequest "missing host" req resp
-    Just domain ->
-      case find (\(p, _, _) -> match p (unpack domain)) backends of
-        Nothing -> notFound "backend" req resp
-        Just (_, be, mgr) -> do
-          let cookieName = pack $ beCookieName be
-              cookieDomain = pack <$> beCookieDomain be
-          case W.pathInfo req of
-            ["robots.txt"] -> get robots req resp
-            (".sproxy":proxy) ->
-              case proxy of
-
-                ["logout"] -> get (logout key cookieName cookieDomain) req resp
-
-                ["oauth2", provider] ->
+      where status =
+              if W.requestMethod req == methodGet
+                then movedPermanently301
+                else temporaryRedirect307
+            newhost =
+              if p == 443
+                then domain
+                else domain <> ":" <> pack (show p)
+            location =
+              "https://" <> newhost <> W.rawPathInfo req <> W.rawQueryString req
+
+sproxy ::
+     ByteString
+  -> Database
+  -> HashMap Text OAuth2Client
+  -> [(Pattern, BackendConf, BE.Manager)]
+  -> W.Application
+sproxy key db oa2 backends =
+  logException $ \req resp -> do
+    Log.debug $ "sproxy <<< " ++ showReq req
+    case requestDomain req of
+      Nothing -> badRequest "missing host" req resp
+      Just domain ->
+        case find (\(p, _, _) -> match p (unpack domain)) backends of
+          Nothing -> notFound "backend" req resp
+          Just (_, be, mgr) -> do
+            let cookieName = pack $ beCookieName be
+                cookieDomain = pack <$> beCookieDomain be
+            case W.pathInfo req of
+              ["robots.txt"] -> get robots req resp
+              (".sproxy":proxy) ->
+                case proxy of
+                  ["logout"] ->
+                    get (logout key cookieName cookieDomain) req resp
+                  ["oauth2", provider] ->
                     case HM.lookup provider oa2 of
                       Nothing -> notFound "OAuth2 provider" req resp
-                      Just oa2c -> get (oauth2callback key db (provider, oa2c) be) req resp
-
-                ["access"] -> do
-                  now <- Just <$> epochTime
-                  case extractCookie key now cookieName req of
-                    Nothing -> authenticationRequired key oa2 req resp
-                    Just (authCookie, _) -> post (checkAccess db authCookie) req resp
-
-                _ -> notFound "proxy" req resp
-
-            _ -> do
-              now <- Just <$> epochTime
-              case extractCookie key now cookieName req of
-                Nothing -> authenticationRequired key oa2 req resp
-                Just cs@(authCookie, _) ->
-                  authorize db cs req >>= \case
-                    Nothing   -> forbidden authCookie req resp
-                    Just req' -> forward mgr req' resp
-
+                      Just oa2c ->
+                        get (oauth2callback key db (provider, oa2c) be) req resp
+                  ["access"] -> do
+                    now <- Just <$> epochTime
+                    case extractCookie key now cookieName req of
+                      Nothing -> authenticationRequired key oa2 req resp
+                      Just (authCookie, _) ->
+                        post (checkAccess db authCookie) req resp
+                  _ -> notFound "proxy" req resp
+              _ -> do
+                now <- Just <$> epochTime
+                case extractCookie key now cookieName req of
+                  Nothing -> authenticationRequired key oa2 req resp
+                  Just cs@(authCookie, _) ->
+                    authorize db cs req >>= \case
+                      Nothing -> forbidden authCookie req resp
+                      Just req' -> forward mgr req' resp
 
 robots :: W.Application
-robots _ resp = resp $
-  W.responseLBS ok200 [(hContentType, "text/plain; charset=utf-8")]
-  "User-agent: *\nDisallow: /"
-
-
-oauth2callback :: ByteString -> Database -> (Text, OAuth2Client) -> BackendConf -> W.Application
+robots _ resp =
+  resp $
+  W.responseLBS
+    ok200
+    [(hContentType, "text/plain; charset=utf-8")]
+    "User-agent: *\nDisallow: /"
+
+oauth2callback ::
+     ByteString
+  -> Database
+  -> (Text, OAuth2Client)
+  -> BackendConf
+  -> W.Application
 oauth2callback key db (provider, oa2c) be req resp =
   case param "code" of
-    Nothing   -> badRequest "missing auth code" req resp
-    Just code -> 
+    Nothing -> badRequest "missing auth code" req resp
+    Just code ->
       case param "state" of
-        Nothing    -> badRequest "missing auth state" req resp
+        Nothing -> badRequest "missing auth state" req resp
         Just state ->
           case State.decode key state of
-            Left msg   -> badRequest ("invalid state: " ++ msg) req resp
+            Left msg -> badRequest ("invalid state: " ++ msg) req resp
             Right url -> do
               au <- oauth2Authenticate oa2c code (redirectURL req provider)
               let email = getEmail au
               Log.info $ "login " ++ show email ++ " by " ++ show provider
               exists <- userExists db email
-              if exists then authenticate key be au url req resp
-                        else userNotFound au req resp
+              if exists
+                then authenticate key be au url req resp
+                else userNotFound au req resp
   where
     param p = do
       (_, v) <- find ((==) p . fst) $ W.queryString req
       v
 
-
 -- XXX: RFC6265: the user agent MUST NOT attach more than one Cookie header field
-extractCookie :: ByteString -> Maybe CTime -> ByteString -> W.Request -> Maybe (AuthCookie, Cookies)
+extractCookie ::
+     ByteString
+  -> Maybe CTime
+  -> ByteString
+  -> W.Request
+  -> Maybe (AuthCookie, Cookies)
 extractCookie key now name req = do
-  (_, cookies)   <- find ((==) hCookie . fst) $ W.requestHeaders req
+  (_, cookies) <- find ((==) hCookie . fst) $ W.requestHeaders req
   (auth, others) <- discriminate cookies
   case cookieDecode key auth of
     Left _ -> Nothing
-    Right cookie -> if maybe True (acExpiry cookie >) now
-      then Just (cookie, others) else Nothing
-  where discriminate cs =
-          case partition ((==) name . fst) $ parseCookies cs of
-            ((_, x):_, xs) -> Just (x, xs)
-            _              -> Nothing
-
+    Right cookie ->
+      if maybe True (acExpiry cookie >) now
+        then Just (cookie, others)
+        else Nothing
+  where
+    discriminate cs =
+      case partition ((==) name . fst) $ parseCookies cs of
+        ((_, x):_, xs) -> Just (x, xs)
+        _ -> Nothing
 
-authenticate :: ByteString -> BackendConf -> AuthUser -> ByteString -> W.Application
+authenticate ::
+     ByteString -> BackendConf -> AuthUser -> ByteString -> W.Application
 authenticate key be user url _req resp = do
   now <- epochTime
   let domain = pack <$> beCookieDomain be
       expiry = now + CTime (beCookieMaxAge be)
-      authCookie = AuthCookie { acUser = user, acExpiry = expiry }
-      cookie = WC.def {
-        WC.setCookieName = pack $ beCookieName be
-      , WC.setCookieHttpOnly = True
-      , WC.setCookiePath = Just "/"
-      , WC.setCookieSameSite = Nothing
-      , WC.setCookieSecure = True
-      , WC.setCookieValue = cookieEncode key authCookie
-      , WC.setCookieDomain = domain
-      , WC.setCookieExpires = Just . posixSecondsToUTCTime . realToFrac $ expiry
-      }
-  resp $ W.responseLBS seeOther303 [
-           (hLocation, url)
-         , ("Set-Cookie", toByteString $ WC.renderSetCookie cookie)
-         ] ""
-
+      authCookie = AuthCookie {acUser = user, acExpiry = expiry}
+      cookie =
+        WC.def
+        { WC.setCookieName = pack $ beCookieName be
+        , WC.setCookieHttpOnly = True
+        , WC.setCookiePath = Just "/"
+        , WC.setCookieSameSite = Nothing
+        , WC.setCookieSecure = True
+        , WC.setCookieValue = cookieEncode key authCookie
+        , WC.setCookieDomain = domain
+        , WC.setCookieExpires =
+            Just . posixSecondsToUTCTime . realToFrac $ expiry
+        }
+  resp $
+    W.responseLBS
+      seeOther303
+      [ (hLocation, url)
+      , ("Set-Cookie", toByteString $ WC.renderSetCookie cookie)
+      ]
+      ""
 
-authorize :: Database -> (AuthCookie, Cookies) -> W.Request -> IO (Maybe W.Request)
+authorize ::
+     Database -> (AuthCookie, Cookies) -> W.Request -> IO (Maybe W.Request)
 authorize db (authCookie, otherCookies) req = do
-  let
-    user       = acUser authCookie
-    domain     = decodeUtf8 . fromJust $ requestDomain req
-    email      = getEmail user
-    emailUtf8  = getEmailUtf8 user
-    familyUtf8 = getFamilyNameUtf8 user
-    givenUtf8  = getGivenNameUtf8 user
-    method     = decodeUtf8 $ W.requestMethod req
-    path       = decodeUtf8 $ W.rawPathInfo req
+  let user = acUser authCookie
+      domain = decodeUtf8 . fromJust $ requestDomain req
+      email = getEmail user
+      emailUtf8 = getEmailUtf8 user
+      familyUtf8 = getFamilyNameUtf8 user
+      givenUtf8 = getGivenNameUtf8 user
+      method = decodeUtf8 $ W.requestMethod req
+      path = decodeUtf8 $ W.rawPathInfo req
   grps <- userGroups db email domain path method
-  if null grps then return Nothing
-  else do
-    ip <- pack . fromJust . fst <$> getNameInfo [NI_NUMERICHOST] True False (W.remoteHost req)
-    return . Just $ req {
-    W.requestHeaders = toList $
-      insert "From" emailUtf8 $
-      insert "X-Groups" (BS.intercalate "," $ encodeUtf8 <$> grps) $
-      insert "X-Given-Name" givenUtf8 $
-      insert "X-Family-Name" familyUtf8 $
-      insert "X-Forwarded-Proto" "https" $
-      insertWith (flip combine) "X-Forwarded-For" ip $
-      setCookies otherCookies $
-      fromListWith combine $ W.requestHeaders req
-  }
+  if null grps
+    then return Nothing
+    else do
+      ip <-
+        pack . fromJust . fst <$>
+        getNameInfo [NI_NUMERICHOST] True False (W.remoteHost req)
+      return . Just $
+        req
+        { W.requestHeaders =
+            toList $
+            insert "From" emailUtf8 $
+            insert "X-Groups" (BS.intercalate "," $ encodeUtf8 <$> grps) $
+            insert "X-Given-Name" givenUtf8 $
+            insert "X-Family-Name" familyUtf8 $
+            insert "X-Forwarded-Proto" "https" $
+            insertWith (flip combine) "X-Forwarded-For" ip $
+            setCookies otherCookies $
+            fromListWith combine $ W.requestHeaders req
+        }
   where
     combine a b = a <> "," <> b
     setCookies [] = delete hCookie
     setCookies cs = insert hCookie (toByteString . renderCookies $ cs)
 
-
 checkAccess :: Database -> AuthCookie -> W.Application
 checkAccess db authCookie req resp = do
   let email = getEmail . acUser $ authCookie
@@ -217,77 +256,96 @@ checkAccess db authCookie req resp = do
       Log.debug $ "access <<< " ++ show inq
       tags <- userAccess db email domain inq
       Log.debug $ "access >>> " ++ show tags
-      resp $ W.responseLBS ok200 [(hContentType, "application/json")] (JSON.encode tags)
-
+      resp $
+        W.responseLBS
+          ok200
+          [(hContentType, "application/json")]
+          (JSON.encode tags)
 
 -- XXX If something seems strange, think about HTTP/1.1 <-> HTTP/1.0.
 -- FIXME For HTTP/1.0 backends we might need an option
 -- FIXME in config file. HTTP Client does HTTP/1.1 by default.
 forward :: BE.Manager -> W.Application
 forward mgr req resp = do
-  let beReq = BE.defaultRequest
+  let beReq =
+        BE.defaultRequest
         { BE.method = W.requestMethod req
         , BE.path = W.rawPathInfo req
         , BE.queryString = W.rawQueryString req
         , BE.requestHeaders = modifyRequestHeaders $ W.requestHeaders req
         , BE.redirectCount = 0
         , BE.decompress = const False
-        , BE.requestBody = case W.requestBodyLength req of
-            W.ChunkedBody   -> requestBodySourceChunkedIO (sourceRequestBody req)
-            W.KnownLength l -> requestBodySourceIO (fromIntegral l) (sourceRequestBody req)
+        , BE.requestBody =
+            case W.requestBodyLength req of
+              W.ChunkedBody ->
+                requestBodySourceChunkedIO (sourceRequestBody req)
+              W.KnownLength l ->
+                requestBodySourceIO (fromIntegral l) (sourceRequestBody req)
         }
-      msg = unpack (BE.method beReq <> " " <> BE.path beReq <> BE.queryString beReq)
+      msg =
+        unpack (BE.method beReq <> " " <> BE.path beReq <> BE.queryString beReq)
   Log.debug $ "BACKEND <<< " ++ msg ++ " " ++ show (BE.requestHeaders beReq)
   BE.withResponse beReq mgr $ \res -> do
-        let status = BE.responseStatus res
-            headers = BE.responseHeaders res
-            body = mapOutput (Chunk . fromByteString) . bodyReaderSource $ BE.responseBody res
-            logging = if statusCode status `elem` [ 400, 500 ] then
-                      Log.warn else Log.debug
-        logging $ "BACKEND >>> " ++ show (statusCode status) ++ " on " ++ msg ++ " " ++ show headers ++ "\n"
-        resp $ responseSource status (modifyResponseHeaders headers) body
-
+    let status = BE.responseStatus res
+        headers = BE.responseHeaders res
+        body =
+          mapOutput (Chunk . fromByteString) . bodyReaderSource $
+          BE.responseBody res
+        logging =
+          if statusCode status `elem` [400, 500]
+            then Log.warn
+            else Log.debug
+    logging $
+      "BACKEND >>> " ++
+      show (statusCode status) ++ " on " ++ msg ++ " " ++ show headers ++ "\n"
+    resp $ responseSource status (modifyResponseHeaders headers) body
 
 modifyRequestHeaders :: RequestHeaders -> RequestHeaders
 modifyRequestHeaders = filter (\(n, _) -> n `notElem` ban)
   where
     ban =
-      [
-        hConnection
-      , hContentLength    -- XXX This is set automtically before sending request to backend
+      [ hConnection
+      , hContentLength -- XXX This is set automtically before sending request to backend
       , hTransferEncoding -- XXX Likewise
       ]
 
-
 modifyResponseHeaders :: ResponseHeaders -> ResponseHeaders
 modifyResponseHeaders = filter (\(n, _) -> n `notElem` ban)
   where
     ban =
-      [
-        hConnection
+      [ hConnection
       -- XXX WAI docs say we MUST NOT add (keep) Content-Length, Content-Range, and Transfer-Encoding,
       -- XXX but we use streaming body, which may add Transfer-Encoding only.
       -- XXX Thus we keep Content-* headers.
       , hTransferEncoding
       ]
 
-
-authenticationRequired :: ByteString -> HashMap Text OAuth2Client -> W.Application
+authenticationRequired ::
+     ByteString -> HashMap Text OAuth2Client -> W.Application
 authenticationRequired key oa2 req resp = do
   Log.info $ "511 Unauthenticated: " ++ showReq req
-  resp $ W.responseLBS networkAuthenticationRequired511 [(hContentType, "text/html; charset=utf-8")] page
+  resp $
+    W.responseLBS
+      networkAuthenticationRequired511
+      [(hContentType, "text/html; charset=utf-8")]
+      page
   where
-    path = if W.requestMethod req == methodGet
-           then W.rawPathInfo req <> W.rawQueryString req
-           else "/"
-    state = State.encode key $ "https://" <> fromJust (W.requestHeaderHost req) <> path
+    path =
+      if W.requestMethod req == methodGet
+        then W.rawPathInfo req <> W.rawQueryString req
+        else "/"
+    state =
+      State.encode key $
+      "https://" <> fromJust (W.requestHeaderHost req) <> path
     authLink :: Text -> OAuth2Client -> ByteString -> ByteString
-    authLink provider oa2c html = 
+    authLink provider oa2c html =
       let u = oauth2AuthorizeURL oa2c state (redirectURL req provider)
           d = pack $ oauth2Description oa2c
       in [qc|{html}<p><a href="{u}">Authenticate with {d}</a></p>|]
     authHtml = foldrWithKey authLink "" oa2
-    page = fromStrict [qc|
+    page =
+      fromStrict
+        [qc|
 <!DOCTYPE html>
 <html lang="en">
   <head>
@@ -301,14 +359,16 @@ authenticationRequired key oa2 req resp = do
 </html>
 |]
 
-
 forbidden :: AuthCookie -> W.Application
 forbidden ac req resp = do
   Log.info $ "403 Forbidden: " ++ show email ++ ": " ++ showReq req
-  resp $ W.responseLBS forbidden403 [(hContentType, "text/html; charset=utf-8")] page
+  resp $
+    W.responseLBS forbidden403 [(hContentType, "text/html; charset=utf-8")] page
   where
     email = getEmailUtf8 . acUser $ ac
-    page = fromStrict [qc|
+    page =
+      fromStrict
+        [qc|
 <!DOCTYPE html>
 <html lang="en">
   <head>
@@ -323,14 +383,16 @@ forbidden ac req resp = do
 </html>
 |]
 
-
 userNotFound :: AuthUser -> W.Application
 userNotFound au _ resp = do
   Log.info $ "404 User not found: " ++ show email
-  resp $ W.responseLBS notFound404 [(hContentType, "text/html; charset=utf-8")] page
+  resp $
+    W.responseLBS notFound404 [(hContentType, "text/html; charset=utf-8")] page
   where
     email = getEmailUtf8 au
-    page = fromStrict [qc|
+    page =
+      fromStrict
+        [qc|
 <!DOCTYPE html>
 <html lang="en">
   <head>
@@ -345,98 +407,102 @@ userNotFound au _ resp = do
 </html>
 |]
 
-
 logout :: ByteString -> ByteString -> Maybe ByteString -> W.Application
 logout key cookieName cookieDomain req resp = do
   let host = fromJust $ W.requestHeaderHost req
   case extractCookie key Nothing cookieName req of
-    Nothing -> resp $ W.responseLBS found302 [ (hLocation, "https://" <> host) ] ""
-    Just _  -> do
-        let cookie = WC.def {
-              WC.setCookieName = cookieName
+    Nothing ->
+      resp $ W.responseLBS found302 [(hLocation, "https://" <> host)] ""
+    Just _ -> do
+      let cookie =
+            WC.def
+            { WC.setCookieName = cookieName
             , WC.setCookieHttpOnly = True
             , WC.setCookiePath = Just "/"
             , WC.setCookieSameSite = Just WC.sameSiteStrict
             , WC.setCookieSecure = True
             , WC.setCookieValue = "goodbye"
             , WC.setCookieDomain = cookieDomain
-            , WC.setCookieExpires = Just . posixSecondsToUTCTime . realToFrac $ CTime 0
+            , WC.setCookieExpires =
+                Just . posixSecondsToUTCTime . realToFrac $ CTime 0
             }
-        resp $ W.responseLBS found302 [
-                 (hLocation, "https://" <> host)
-               , ("Set-Cookie", toByteString $ WC.renderSetCookie cookie)
-               ] ""
-
-
-badRequest ::String -> W.Application
+      resp $
+        W.responseLBS
+          found302
+          [ (hLocation, "https://" <> host)
+          , ("Set-Cookie", toByteString $ WC.renderSetCookie cookie)
+          ]
+          ""
+
+badRequest :: String -> W.Application
 badRequest msg req resp = do
   Log.warn $ "400 Bad Request (" ++ msg ++ "): " ++ showReq req
   resp $ W.responseLBS badRequest400 [] "Bad Request"
 
-
-notFound ::String -> W.Application
+notFound :: String -> W.Application
 notFound msg req resp = do
   Log.warn $ "404 Not Found (" ++ msg ++ "): " ++ showReq req
   resp $ W.responseLBS notFound404 [] "Not Found"
 
-
 logException :: W.Middleware
 logException app req resp =
-  catches (app req resp) [
-    Handler badGateway,
-    Handler internalError
-  ]
+  catches (app req resp) [Handler badGateway, Handler internalError]
   where
     internalError :: SomeException -> IO W.ResponseReceived
     internalError = response internalServerError500
-
     badGateway :: BE.HttpException -> IO W.ResponseReceived
     badGateway = response badGateway502
-
     response :: Exception e => Status -> e -> IO W.ResponseReceived
     response st e = do
-      Log.error $ show (statusCode st) ++ " " ++ unpack (statusMessage st)
-                ++ ": " ++ displayException e ++ " on " ++ showReq req
-      resp $ W.responseLBS st [(hContentType, "text/plain")] (fromStrict $ statusMessage st)
-
-
+      Log.error $
+        show (statusCode st) ++
+        " " ++
+        unpack (statusMessage st) ++
+        ": " ++ displayException e ++ " on " ++ showReq req
+      resp $
+        W.responseLBS
+          st
+          [(hContentType, "text/plain")]
+          (fromStrict $ statusMessage st)
 
 get :: W.Middleware
 get app req resp
   | W.requestMethod req == methodGet = app req resp
   | otherwise = do
     Log.warn $ "405 Method Not Allowed: " ++ showReq req
-    resp $ W.responseLBS methodNotAllowed405 [("Allow", "GET")] "Method Not Allowed"
-
+    resp $
+      W.responseLBS methodNotAllowed405 [("Allow", "GET")] "Method Not Allowed"
 
 post :: W.Middleware
 post app req resp
   | W.requestMethod req == methodPost = app req resp
   | otherwise = do
     Log.warn $ "405 Method Not Allowed: " ++ showReq req
-    resp $ W.responseLBS methodNotAllowed405 [("Allow", "POST")] "Method Not Allowed"
-
+    resp $
+      W.responseLBS methodNotAllowed405 [("Allow", "POST")] "Method Not Allowed"
 
 redirectURL :: W.Request -> Text -> ByteString
 redirectURL req provider =
-  "https://" <> fromJust (W.requestHeaderHost req)
-             <> "/.sproxy/oauth2/" <> encodeUtf8 provider
-
+  "https://" <> fromJust (W.requestHeaderHost req) <> "/.sproxy/oauth2/" <>
+  encodeUtf8 provider
 
 requestDomain :: W.Request -> Maybe ByteString
 requestDomain req = do
   h <- W.requestHeaderHost req
   return . fst . BS.break (== _colon) $ h
 
-
 -- XXX: make sure not to reveal the cookie, which can be valid (!)
 showReq :: W.Request -> String
-showReq req = 
-    unpack ( W.requestMethod req <> " "
-           <> fromMaybe "<no host>" (W.requestHeaderHost req)
-           <> W.rawPathInfo req <> W.rawQueryString req <> " " )
-    ++ show (W.httpVersion req) ++ " "
-    ++ show (fromMaybe "-" $ W.requestHeaderReferer req) ++ " "
-    ++ show (fromMaybe "-" $ W.requestHeaderUserAgent req)
-    ++ " from " ++ show (W.remoteHost req)
-
+showReq req =
+  unpack
+    (W.requestMethod req <> " " <>
+     fromMaybe "<no host>" (W.requestHeaderHost req) <>
+     W.rawPathInfo req <>
+     W.rawQueryString req <>
+     " ") ++
+  show (W.httpVersion req) ++
+  " " ++
+  show (fromMaybe "-" $ W.requestHeaderReferer req) ++
+  " " ++
+  show (fromMaybe "-" $ W.requestHeaderUserAgent req) ++
+  " from " ++ show (W.remoteHost req)
diff --git a/src/Sproxy/Application/Access.hs b/src/Sproxy/Application/Access.hs
index d8984ee..6ba972c 100644
--- a/src/Sproxy/Application/Access.hs
+++ b/src/Sproxy/Application/Access.hs
@@ -1,23 +1,21 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE OverloadedStrings #-}
 
-module Sproxy.Application.Access (
-  Inquiry
-, Question(..)
-) where
+module Sproxy.Application.Access
+  ( Inquiry
+  , Question(..)
+  ) where
 
 import Data.Aeson (FromJSON)
 import Data.HashMap.Strict (HashMap)
 import Data.Text (Text)
 import GHC.Generics (Generic)
 
-
-data Question = Question {
-  path :: Text
-, method :: Text
-} deriving (Generic, Show)
+data Question = Question
+  { path :: Text
+  , method :: Text
+  } deriving (Generic, Show)
 
 instance FromJSON Question
 
 type Inquiry = HashMap Text Question
-
diff --git a/src/Sproxy/Application/Cookie.hs b/src/Sproxy/Application/Cookie.hs
index a86f42a..a9a8ad6 100644
--- a/src/Sproxy/Application/Cookie.hs
+++ b/src/Sproxy/Application/Cookie.hs
@@ -1,56 +1,57 @@
 {-# LANGUAGE OverloadedStrings #-}
-module Sproxy.Application.Cookie (
-  AuthCookie(..)
-, AuthUser
-, cookieDecode
-, cookieEncode
-, getEmail
-, getEmailUtf8
-, getFamilyNameUtf8
-, getGivenNameUtf8
-, newUser
-, setFamilyName
-, setGivenName
-) where
+
+module Sproxy.Application.Cookie
+  ( AuthCookie(..)
+  , AuthUser
+  , cookieDecode
+  , cookieEncode
+  , getEmail
+  , getEmailUtf8
+  , getFamilyNameUtf8
+  , getGivenNameUtf8
+  , newUser
+  , setFamilyName
+  , setGivenName
+  ) where
 
 import Data.ByteString (ByteString)
-import Data.Text (Text, toLower, strip)
+import qualified Data.Serialize as DS
+import Data.Text (Text, strip, toLower)
 import Data.Text.Encoding (decodeUtf8, encodeUtf8)
 import Foreign.C.Types (CTime(..))
-import qualified Data.Serialize as DS
 
 import qualified Sproxy.Application.State as State
 
-data AuthUser = AuthUser {
-  auEmail      :: ByteString
-, auGivenName  :: ByteString
-, auFamilyName :: ByteString
-}
+data AuthUser = AuthUser
+  { auEmail :: ByteString
+  , auGivenName :: ByteString
+  , auFamilyName :: ByteString
+  }
 
-data AuthCookie = AuthCookie {
-  acUser   :: AuthUser
-, acExpiry :: CTime
-}
+data AuthCookie = AuthCookie
+  { acUser :: AuthUser
+  , acExpiry :: CTime
+  }
 
 instance DS.Serialize AuthCookie where
   put c = DS.put (auEmail u, auGivenName u, auFamilyName u, x)
-          where u = acUser c
-                x = (\(CTime i) -> i) $ acExpiry c
+    where
+      u = acUser c
+      x = (\(CTime i) -> i) $ acExpiry c
   get = do
     (e, n, f, x) <- DS.get
-    return AuthCookie {
-        acUser = AuthUser { auEmail = e, auGivenName = n, auFamilyName = f }
+    return
+      AuthCookie
+      { acUser = AuthUser {auEmail = e, auGivenName = n, auFamilyName = f}
       , acExpiry = CTime x
       }
 
-
 cookieDecode :: ByteString -> ByteString -> Either String AuthCookie
 cookieDecode key d = State.decode key d >>= DS.decode
 
 cookieEncode :: ByteString -> AuthCookie -> ByteString
 cookieEncode key = State.encode key . DS.encode
 
-
 getEmail :: AuthUser -> Text
 getEmail = decodeUtf8 . auEmail
 
@@ -63,17 +64,16 @@ getGivenNameUtf8 = auGivenName
 getFamilyNameUtf8 :: AuthUser -> ByteString
 getFamilyNameUtf8 = auFamilyName
 
-
 newUser :: Text -> AuthUser
-newUser email = AuthUser {
-    auEmail = encodeUtf8 . toLower . strip $ email
+newUser email =
+  AuthUser
+  { auEmail = encodeUtf8 . toLower . strip $ email
   , auGivenName = ""
   , auFamilyName = ""
   }
 
 setGivenName :: Text -> AuthUser -> AuthUser
-setGivenName given au = au{ auGivenName = encodeUtf8 . strip $ given }
+setGivenName given au = au {auGivenName = encodeUtf8 . strip $ given}
 
 setFamilyName :: Text -> AuthUser -> AuthUser
-setFamilyName family au = au{ auFamilyName = encodeUtf8 . strip $ family }
-
+setFamilyName family au = au {auFamilyName = encodeUtf8 . strip $ family}
diff --git a/src/Sproxy/Application/OAuth2/Common.hs b/src/Sproxy/Application/OAuth2/Common.hs
index 0324e62..ae96e68 100644
--- a/src/Sproxy/Application/OAuth2/Common.hs
+++ b/src/Sproxy/Application/OAuth2/Common.hs
@@ -1,40 +1,37 @@
 {-# LANGUAGE OverloadedStrings #-}
-module Sproxy.Application.OAuth2.Common (
-  AccessTokenBody(..)
-, OAuth2Client(..)
-, OAuth2Provider
-) where
+
+module Sproxy.Application.OAuth2.Common
+  ( AccessTokenBody(..)
+  , OAuth2Client(..)
+  , OAuth2Provider
+  ) where
 
 import Control.Applicative (empty)
-import Data.Aeson (FromJSON, parseJSON, Value(Object), (.:))
-import Data.ByteString(ByteString)
+import Data.Aeson (FromJSON, Value(Object), (.:), parseJSON)
+import Data.ByteString (ByteString)
 import Data.Text (Text)
 
 import Sproxy.Application.Cookie (AuthUser)
 
-data OAuth2Client = OAuth2Client {
-  oauth2Description :: String
-, oauth2AuthorizeURL
-    :: ByteString -- state
-    -> ByteString -- redirect url
-    -> ByteString
-, oauth2Authenticate
-    :: ByteString -- code
-    -> ByteString -- redirect url
-    -> IO AuthUser
-}
+data OAuth2Client = OAuth2Client
+  { oauth2Description :: String
+  , oauth2AuthorizeURL :: ByteString -- state
+                           -> ByteString -- redirect url
+                               -> ByteString
+  , oauth2Authenticate :: ByteString -- code
+                           -> ByteString -- redirect url
+                               -> IO AuthUser
+  }
 
 type OAuth2Provider = (ByteString, ByteString) -> OAuth2Client
 
 -- | RFC6749. We ignore optional token_type ("Bearer" from Google, omitted by LinkedIn)
 --   and expires_in because we don't use them, *and* expires_in creates troubles:
 --   it's an integer from Google and string from LinkedIn (sic!)
-data AccessTokenBody = AccessTokenBody {
-  accessToken :: Text
-} deriving (Eq, Show)
+data AccessTokenBody = AccessTokenBody
+  { accessToken :: Text
+  } deriving (Eq, Show)
 
 instance FromJSON AccessTokenBody where
-  parseJSON (Object v) = AccessTokenBody
-    <$> v .:  "access_token"
+  parseJSON (Object v) = AccessTokenBody <$> v .: "access_token"
   parseJSON _ = empty
-
diff --git a/src/Sproxy/Application/State.hs b/src/Sproxy/Application/State.hs
index 29d9252..5f836e6 100644
--- a/src/Sproxy/Application/State.hs
+++ b/src/Sproxy/Application/State.hs
@@ -1,30 +1,25 @@
-module Sproxy.Application.State (
-  decode
-, encode
-) where
+module Sproxy.Application.State
+  ( decode
+  , encode
+  ) where
 
 import Data.ByteString (ByteString)
-import Data.ByteString.Lazy (fromStrict, toStrict)
-import Data.Digest.Pure.SHA (hmacSha1, bytestringDigest)
 import qualified Data.ByteString.Base64 as Base64
+import Data.ByteString.Lazy (fromStrict, toStrict)
+import Data.Digest.Pure.SHA (bytestringDigest, hmacSha1)
 import qualified Data.Serialize as DS
 
-
 -- FIXME: Compress / decompress ?
-
-
 encode :: ByteString -> ByteString -> ByteString
 encode key payload = Base64.encode . DS.encode $ (payload, digest key payload)
 
-
 decode :: ByteString -> ByteString -> Either String ByteString
 decode key d = do
   (payload, dgst) <- DS.decode =<< Base64.decode d
   if dgst /= digest key payload
-  then Left "junk"
-  else Right payload
-  
+    then Left "junk"
+    else Right payload
 
 digest :: ByteString -> ByteString -> ByteString
-digest key payload = toStrict . bytestringDigest $ hmacSha1 (fromStrict key) (fromStrict payload)
-
+digest key payload =
+  toStrict . bytestringDigest $ hmacSha1 (fromStrict key) (fromStrict payload)
diff --git a/src/Sproxy/Config.hs b/src/Sproxy/Config.hs
index e0f35a3..f1d8004 100644
--- a/src/Sproxy/Config.hs
+++ b/src/Sproxy/Config.hs
@@ -1,9 +1,10 @@
 {-# LANGUAGE OverloadedStrings #-}
-module Sproxy.Config (
-  BackendConf(..)
-, ConfigFile(..)
-, OAuth2Conf(..)
-) where
+
+module Sproxy.Config
+  ( BackendConf(..)
+  , ConfigFile(..)
+  , OAuth2Conf(..)
+  ) where
 
 import Control.Applicative (empty)
 import Data.Aeson (FromJSON, parseJSON)
@@ -11,84 +12,78 @@ import Data.HashMap.Strict (HashMap)
 import Data.Int (Int64)
 import Data.Text (Text)
 import Data.Word (Word16)
-import Data.Yaml (Value(Object), (.:), (.:?), (.!=))
+import Data.Yaml (Value(Object), (.!=), (.:), (.:?))
 
 import Sproxy.Logging (LogLevel(Debug))
 
-data ConfigFile = ConfigFile {
-  cfListen       :: Word16
-, cfSsl          :: Bool
-, cfUser         :: String
-, cfHome         :: FilePath
-, cfLogLevel     :: LogLevel
-, cfSslCert      :: Maybe FilePath
-, cfSslKey       :: Maybe FilePath
-, cfSslCertChain :: [FilePath]
-, cfKey          :: Maybe String
-, cfListen80     :: Maybe Bool
-, cfHttpsPort    :: Maybe Word16
-, cfBackends     :: [BackendConf]
-, cfOAuth2       :: HashMap Text OAuth2Conf
-, cfDataFile     :: Maybe FilePath
-, cfDatabase     :: Maybe String
-, cfPgPassFile   :: Maybe FilePath
-, cfHTTP2        :: Bool
-} deriving (Show)
+data ConfigFile = ConfigFile
+  { cfListen :: Word16
+  , cfSsl :: Bool
+  , cfUser :: String
+  , cfHome :: FilePath
+  , cfLogLevel :: LogLevel
+  , cfSslCert :: Maybe FilePath
+  , cfSslKey :: Maybe FilePath
+  , cfSslCertChain :: [FilePath]
+  , cfKey :: Maybe String
+  , cfListen80 :: Maybe Bool
+  , cfHttpsPort :: Maybe Word16
+  , cfBackends :: [BackendConf]
+  , cfOAuth2 :: HashMap Text OAuth2Conf
+  , cfDataFile :: Maybe FilePath
+  , cfDatabase :: Maybe String
+  , cfPgPassFile :: Maybe FilePath
+  , cfHTTP2 :: Bool
+  } deriving (Show)
 
 instance FromJSON ConfigFile where
-  parseJSON (Object m) = ConfigFile <$>
-        m .:? "listen"         .!= 443
-    <*> m .:? "ssl"            .!= True
-    <*> m .:? "user"           .!= "sproxy"
-    <*> m .:? "home"           .!= "."
-    <*> m .:? "log_level"      .!= Debug
-    <*> m .:? "ssl_cert"
-    <*> m .:? "ssl_key"
-    <*> m .:? "ssl_cert_chain" .!= []
-    <*> m .:? "key"
-    <*> m .:? "listen80"
-    <*> m .:? "https_port"
-    <*> m .:  "backends"
-    <*> m .:  "oauth2"
-    <*> m .:? "datafile"
-    <*> m .:? "database"
-    <*> m .:? "pgpassfile"
-    <*> m .:? "http2"          .!= True
+  parseJSON (Object m) =
+    ConfigFile <$> m .:? "listen" .!= 443 <*> m .:? "ssl" .!= True <*>
+    m .:? "user" .!= "sproxy" <*>
+    m .:? "home" .!= "." <*>
+    m .:? "log_level" .!= Debug <*>
+    m .:? "ssl_cert" <*>
+    m .:? "ssl_key" <*>
+    m .:? "ssl_cert_chain" .!= [] <*>
+    m .:? "key" <*>
+    m .:? "listen80" <*>
+    m .:? "https_port" <*>
+    m .: "backends" <*>
+    m .: "oauth2" <*>
+    m .:? "datafile" <*>
+    m .:? "database" <*>
+    m .:? "pgpassfile" <*>
+    m .:? "http2" .!= True
   parseJSON _ = empty
 
-
-data BackendConf = BackendConf {
-  beName         :: String
-, beAddress      :: String
-, bePort         :: Maybe Word16
-, beSocket       :: Maybe FilePath
-, beCookieName   :: String
-, beCookieDomain :: Maybe String
-, beCookieMaxAge :: Int64
-, beConnCount    :: Int
-} deriving (Show)
+data BackendConf = BackendConf
+  { beName :: String
+  , beAddress :: String
+  , bePort :: Maybe Word16
+  , beSocket :: Maybe FilePath
+  , beCookieName :: String
+  , beCookieDomain :: Maybe String
+  , beCookieMaxAge :: Int64
+  , beConnCount :: Int
+  } deriving (Show)
 
 instance FromJSON BackendConf where
-  parseJSON (Object m) = BackendConf <$>
-        m .:? "name"           .!= "*"
-    <*> m .:? "address"        .!= "127.0.0.1"
-    <*> m .:? "port"
-    <*> m .:? "socket"
-    <*> m .:? "cookie_name"    .!= "sproxy"
-    <*> m .:? "cookie_domain"
-    <*> m .:? "cookie_max_age" .!= (7 * 24 * 60 * 60)
-    <*> m .:? "conn_count"     .!= 32
+  parseJSON (Object m) =
+    BackendConf <$> m .:? "name" .!= "*" <*> m .:? "address" .!= "127.0.0.1" <*>
+    m .:? "port" <*>
+    m .:? "socket" <*>
+    m .:? "cookie_name" .!= "sproxy" <*>
+    m .:? "cookie_domain" <*>
+    m .:? "cookie_max_age" .!= (7 * 24 * 60 * 60) <*>
+    m .:? "conn_count" .!= 32
   parseJSON _ = empty
 
-
-data OAuth2Conf = OAuth2Conf {
-  oa2ClientId     :: String
-, oa2ClientSecret :: String
-} deriving (Show)
+data OAuth2Conf = OAuth2Conf
+  { oa2ClientId :: String
+  , oa2ClientSecret :: String
+  } deriving (Show)
 
 instance FromJSON OAuth2Conf where
-  parseJSON (Object m) = OAuth2Conf <$>
-        m .: "client_id"
-    <*> m .: "client_secret"
+  parseJSON (Object m) =
+    OAuth2Conf <$> m .: "client_id" <*> m .: "client_secret"
   parseJSON _ = empty
-
diff --git a/src/Sproxy/Logging.hs b/src/Sproxy/Logging.hs
index 651a73a..93bc355 100644
--- a/src/Sproxy/Logging.hs
+++ b/src/Sproxy/Logging.hs
@@ -1,12 +1,12 @@
-module Sproxy.Logging (
-  LogLevel(..)
-, debug
-, error
-, info
-, level
-, start
-, warn
-) where
+module Sproxy.Logging
+  ( LogLevel(..)
+  , debug
+  , error
+  , info
+  , level
+  , start
+  , warn
+  ) where
 
 import Prelude hiding (error)
 
@@ -15,13 +15,13 @@ import Control.Concurrent (forkIO)
 import Control.Concurrent.Chan (Chan, newChan, readChan, writeChan)
 import Control.Monad (forever, when)
 import Data.Aeson (FromJSON, ToJSON)
+import qualified Data.Aeson as JSON
 import Data.Char (toLower)
 import Data.IORef (IORef, newIORef, readIORef, writeIORef)
+import qualified Data.Text as T
 import System.IO (hPrint, stderr)
 import System.IO.Unsafe (unsafePerformIO)
 import Text.Read (readMaybe)
-import qualified Data.Aeson as JSON
-import qualified Data.Text as T
 
 start :: LogLevel -> IO ()
 start None = return ()
@@ -34,16 +34,15 @@ start lvl = do
 info :: String -> IO ()
 info = send . Message Info
 
-warn:: String -> IO ()
+warn :: String -> IO ()
 warn = send . Message Warning
 
-error:: String -> IO ()
+error :: String -> IO ()
 error = send . Message Error
 
 debug :: String -> IO ()
 debug = send . Message Debug
 
-
 send :: Message -> IO ()
 send msg@(Message l _) = do
   lvl <- level
@@ -62,38 +61,46 @@ logLevel = unsafePerformIO (newIORef None)
 level :: IO LogLevel
 level = readIORef logLevel
 
-
-data LogLevel = None | Error | Warning | Info | Debug
+data LogLevel
+  = None
+  | Error
+  | Warning
+  | Info
+  | Debug
   deriving (Enum, Ord, Eq)
 
 instance Show LogLevel where
-  show None    = "NONE"
-  show Error   = "ERROR"
+  show None = "NONE"
+  show Error = "ERROR"
   show Warning = "WARN"
-  show Info    = "INFO"
-  show Debug   = "DEBUG"
+  show Info = "INFO"
+  show Debug = "DEBUG"
 
 instance Read LogLevel where
   readsPrec _ s
-        | l == "none"  = [ (None,    "") ]
-        | l == "error" = [ (Error,   "") ]
-        | l == "warn"  = [ (Warning, "") ]
-        | l == "info"  = [ (Info,    "") ]
-        | l == "debug" = [ (Debug,   "") ]
-        | otherwise = [ ]
-        where l = map toLower s
+    | l == "none" = [(None, "")]
+    | l == "error" = [(Error, "")]
+    | l == "warn" = [(Warning, "")]
+    | l == "info" = [(Info, "")]
+    | l == "debug" = [(Debug, "")]
+    | otherwise = []
+    where
+      l = map toLower s
 
 instance ToJSON LogLevel where
   toJSON = JSON.String . T.pack . show
 
 instance FromJSON LogLevel where
   parseJSON (JSON.String s) =
-    maybe (fail $ "unknown log level: " ++ show s) return (readMaybe . T.unpack $ s)
+    maybe
+      (fail $ "unknown log level: " ++ show s)
+      return
+      (readMaybe . T.unpack $ s)
   parseJSON _ = empty
 
-
-data Message = Message LogLevel String
+data Message =
+  Message LogLevel
+          String
 
 instance Show Message where
   show (Message lvl str) = show lvl ++ ": " ++ str
-
diff --git a/src/Sproxy/Server.hs b/src/Sproxy/Server.hs
index 7b65f32..75a50a4 100644
--- a/src/Sproxy/Server.hs
+++ b/src/Sproxy/Server.hs
@@ -1,6 +1,6 @@
-module Sproxy.Server (
-  server
-) where
+module Sproxy.Server
+  ( server
+  ) where
 
 import Control.Concurrent (forkIO)
 import Control.Exception (bracketOnError)
@@ -11,136 +11,128 @@ import Data.Maybe (fromMaybe)
 import Data.Text (Text)
 import Data.Word (Word16)
 import Data.Yaml.Include (decodeFileEither)
-import Network.HTTP.Client (Manager, ManagerSettings(..), defaultManagerSettings, newManager, socketConnection)
+import Network.HTTP.Client
+       (Manager, ManagerSettings(..), defaultManagerSettings, newManager,
+        socketConnection)
 import Network.HTTP.Client.Internal (Connection)
-import Network.Socket ( Socket, Family(AF_INET, AF_UNIX), SockAddr(SockAddrInet, SockAddrUnix),
-  SocketOption(ReuseAddr), SocketType(Stream), bind, close, connect, inet_addr,
-  listen, maxListenQueue, setSocketOption, socket )
+import Network.Socket
+       (Family(AF_INET, AF_UNIX), SockAddr(SockAddrInet, SockAddrUnix),
+        Socket, SocketOption(ReuseAddr), SocketType(Stream), bind, close,
+        connect, inet_addr, listen, maxListenQueue, setSocketOption,
+        socket)
 import Network.Wai (Application)
-import Network.Wai.Handler.WarpTLS (tlsSettingsChain, runTLSSocket)
-import Network.Wai.Handler.Warp ( Settings, defaultSettings, runSettingsSocket,
-  setHTTP2Disabled, setOnException )
+import Network.Wai.Handler.Warp
+       (Settings, defaultSettings, runSettingsSocket, setHTTP2Disabled,
+        setOnException)
+import Network.Wai.Handler.WarpTLS (runTLSSocket, tlsSettingsChain)
 import System.Entropy (getEntropy)
 import System.Environment (setEnv)
 import System.Exit (exitFailure)
 import System.FilePath.Glob (compile)
 import System.IO (hPutStrLn, stderr)
-import System.Posix.User ( GroupEntry(..), UserEntry(..),
-  getAllGroupEntries, getRealUserID,
-  getUserEntryForName, setGroupID, setGroups, setUserID )
+import System.Posix.User
+       (GroupEntry(..), UserEntry(..), getAllGroupEntries, getRealUserID,
+        getUserEntryForName, setGroupID, setGroups, setUserID)
 
-import Sproxy.Application (sproxy, redirect)
-import Sproxy.Application.OAuth2.Common (OAuth2Client)
-import Sproxy.Config (BackendConf(..), ConfigFile(..), OAuth2Conf(..))
+import Sproxy.Application (redirect, sproxy)
 import qualified Sproxy.Application.OAuth2 as OAuth2
+import Sproxy.Application.OAuth2.Common (OAuth2Client)
+import Sproxy.Config
+       (BackendConf(..), ConfigFile(..), OAuth2Conf(..))
 import qualified Sproxy.Logging as Log
 import qualified Sproxy.Server.DB as DB
 
-
 {- TODO:
  - Log.error && exitFailure should be replaced
  - by Log.fatal && wait for logger thread to print && exitFailure
 -}
-
 server :: FilePath -> IO ()
 server configFile = do
   cf <- readConfigFile configFile
   Log.start $ cfLogLevel cf
-
   sock <- socket AF_INET Stream 0
   setSocketOption sock ReuseAddr 1
   bind sock $ SockAddrInet (fromIntegral $ cfListen cf) 0
-
-  maybe80 <- if fromMaybe (443 == cfListen cf) (cfListen80 cf)
-    then do
-      sock80 <- socket AF_INET Stream 0
-      setSocketOption sock80 ReuseAddr 1
-      bind sock80 $ SockAddrInet 80 0
-      return (Just sock80)
-    else
-      return Nothing
-
+  maybe80 <-
+    if fromMaybe (443 == cfListen cf) (cfListen80 cf)
+      then do
+        sock80 <- socket AF_INET Stream 0
+        setSocketOption sock80 ReuseAddr 1
+        bind sock80 $ SockAddrInet 80 0
+        return (Just sock80)
+      else return Nothing
   uid <- getRealUserID
   when (0 == uid) $ do
     let user = cfUser cf
     Log.info $ "switching to user " ++ show user
     u <- getUserEntryForName user
-    groupIDs <- map groupID . filter (elem user . groupMembers)
-             <$> getAllGroupEntries
+    groupIDs <-
+      map groupID . filter (elem user . groupMembers) <$> getAllGroupEntries
     setGroups groupIDs
     setGroupID $ userGroupID u
     setUserID $ userID u
-
   ds <- newDataSource cf
   db <- DB.start (cfHome cf) ds
-
-  key <- maybe
-           (Log.info "using new random key" >> getEntropy 32)
-           (return . pack)
-           (cfKey cf)
-
-  let
-    settings =
-      (if cfHTTP2 cf then id else setHTTP2Disabled) $
-      setOnException (\_ _ -> return ())
-      defaultSettings
-
-  oauth2clients <- HM.fromList <$> mapM newOAuth2Client (HM.toList (cfOAuth2 cf))
-
+  key <-
+    maybe
+      (Log.info "using new random key" >> getEntropy 32)
+      (return . pack)
+      (cfKey cf)
+  let settings =
+        (if cfHTTP2 cf
+           then id
+           else setHTTP2Disabled) $
+        setOnException (\_ _ -> return ()) defaultSettings
+  oauth2clients <-
+    HM.fromList <$> mapM newOAuth2Client (HM.toList (cfOAuth2 cf))
   backends <-
-    mapM (\be -> do
-      m <- newBackendManager be
-      return (compile $ beName be, be, m)
-    ) $ cfBackends cf
-
-
+    mapM
+      (\be -> do
+         m <- newBackendManager be
+         return (compile $ beName be, be, m)) $
+    cfBackends cf
   warpServer <- newServer cf
-
   case maybe80 of
-    Nothing     -> return ()
+    Nothing -> return ()
     Just sock80 -> do
       let httpsPort = fromMaybe (cfListen cf) (cfHttpsPort cf)
       Log.info "listening on port 80 (HTTP redirect)"
       listen sock80 maxListenQueue
       void . forkIO $ runSettingsSocket settings sock80 (redirect httpsPort)
-
   -- XXX 2048 is from bindPortTCP from streaming-commons used internally by runTLS.
   -- XXX Since we don't call runTLS, we listen socket here with the same options.
   Log.info $ "proxy listening on port " ++ show (cfListen cf)
   listen sock (max 2048 maxListenQueue)
   warpServer settings sock (sproxy key db oauth2clients backends)
 
-
 newDataSource :: ConfigFile -> IO (Maybe DB.DataSource)
 newDataSource cf =
   case (cfDataFile cf, cfDatabase cf) of
     (Nothing, Just str) -> do
       case cfPgPassFile cf of
         Nothing -> return ()
-        Just f  -> do
+        Just f -> do
           Log.info $ "pgpassfile: " ++ show f
           setEnv "PGPASSFILE" f
       return . Just $ DB.PostgreSQL str
-
-    (Just f, Nothing)   -> return . Just $ DB.File f
-
-    (Nothing, Nothing)  -> return Nothing
+    (Just f, Nothing) -> return . Just $ DB.File f
+    (Nothing, Nothing) -> return Nothing
     _ -> do
       Log.error "only one data source can be used"
       exitFailure
 
-
 newOAuth2Client :: (Text, OAuth2Conf) -> IO (Text, OAuth2Client)
 newOAuth2Client (name, cfg) =
   case HM.lookup name OAuth2.providers of
-    Nothing -> do Log.error $ "OAuth2 provider " ++ show name ++ " is not supported"
-                  exitFailure
+    Nothing -> do
+      Log.error $ "OAuth2 provider " ++ show name ++ " is not supported"
+      exitFailure
     Just provider -> do
       Log.info $ "oauth2: adding " ++ show name
       return (name, provider (client_id, client_secret))
-  where client_id = pack $ oa2ClientId cfg
-        client_secret = pack $ oa2ClientSecret cfg
-
+  where
+    client_id = pack $ oa2ClientId cfg
+    client_secret = pack $ oa2ClientSecret cfg
 
 newBackendManager :: BackendConf -> IO Manager
 newBackendManager be = do
@@ -149,20 +141,18 @@ newBackendManager be = do
       (Just f, Nothing) -> do
         Log.info $ "backend `" ++ beName be ++ "' on UNIX socket " ++ f
         return $ openUnixSocketConnection f
-
       (Nothing, Just n) -> do
-        Log.info $ "backend `" ++ beName be ++ "' on " ++ beAddress be ++ ":" ++ show n
+        Log.info $
+          "backend `" ++ beName be ++ "' on " ++ beAddress be ++ ":" ++ show n
         return $ openTCPConnection (beAddress be) n
-
       _ -> do
-            Log.error "either backend port number or UNIX socket path is required."
-            exitFailure
-
-  newManager defaultManagerSettings {
-    managerRawConnection = return $ \_ _ _ -> openConn
-  , managerConnCount = beConnCount be
-  }
-
+        Log.error "either backend port number or UNIX socket path is required."
+        exitFailure
+  newManager
+    defaultManagerSettings
+    { managerRawConnection = return $ \_ _ _ -> openConn
+    , managerConnCount = beConnCount be
+    }
 
 newServer :: ConfigFile -> IO (Settings -> Socket -> Application -> IO ())
 newServer cf
@@ -170,33 +160,31 @@ newServer cf
     case (cfSslKey cf, cfSslCert cf) of
       (Just k, Just c) ->
         return $ runTLSSocket (tlsSettingsChain c (cfSslCertChain cf) k)
-      _ -> do Log.error "missings SSL certificate"
-              exitFailure
+      _ -> do
+        Log.error "missings SSL certificate"
+        exitFailure
   | otherwise = do
-      Log.warn "not using SSL!"
-      return runSettingsSocket
-
+    Log.warn "not using SSL!"
+    return runSettingsSocket
 
 openUnixSocketConnection :: FilePath -> IO Connection
 openUnixSocketConnection f =
   bracketOnError
-   (socket AF_UNIX Stream 0)
-   close
-   (\s -> do
-      connect s (SockAddrUnix f)
-      socketConnection s 8192)
-
+    (socket AF_UNIX Stream 0)
+    close
+    (\s -> do
+       connect s (SockAddrUnix f)
+       socketConnection s 8192)
 
 openTCPConnection :: String -> Word16 -> IO Connection
 openTCPConnection addr port =
   bracketOnError
-   (socket AF_INET Stream 0)
-   close
-   (\s -> do
-      a <- inet_addr addr
-      connect s (SockAddrInet (fromIntegral port) a)
-      socketConnection s 8192)
-
+    (socket AF_INET Stream 0)
+    close
+    (\s -> do
+       a <- inet_addr addr
+       connect s (SockAddrInet (fromIntegral port) a)
+       socketConnection s 8192)
 
 readConfigFile :: FilePath -> IO ConfigFile
 readConfigFile f = do
@@ -206,4 +194,3 @@ readConfigFile f = do
       hPutStrLn stderr $ "FATAL: " ++ f ++ ": " ++ show e
       exitFailure
     Right cf -> return cf
-
diff --git a/src/Sproxy/Server/DB.hs b/src/Sproxy/Server/DB.hs
index 662a9c7..be44f69 100644
--- a/src/Sproxy/Server/DB.hs
+++ b/src/Sproxy/Server/DB.hs
@@ -1,72 +1,83 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
-module Sproxy.Server.DB (
-  Database
-, DataSource(..)
-, userAccess
-, userExists
-, userGroups
-, start
-) where
+
+module Sproxy.Server.DB
+  ( Database
+  , DataSource(..)
+  , userAccess
+  , userExists
+  , userGroups
+  , start
+  ) where
 
 import Control.Concurrent (forkIO, threadDelay)
 import Control.Exception (SomeException, bracket, catch, finally)
 import Control.Monad (filterM, forever, void)
 import Data.ByteString.Char8 (pack)
+import qualified Data.HashMap.Strict as HM
 import Data.Pool (Pool, createPool, withResource)
 import Data.Text (Text, toLower, unpack)
 import Data.Yaml (decodeFileEither)
-import Database.SQLite.Simple (NamedParam((:=)))
-import Text.InterpolatedString.Perl6 (q, qc)
-import qualified Data.HashMap.Strict as HM
 import qualified Database.PostgreSQL.Simple as PG
+import Database.SQLite.Simple (NamedParam((:=)))
 import qualified Database.SQLite.Simple as SQLite
+import Text.InterpolatedString.Perl6 (q, qc)
 
-import Sproxy.Server.DB.DataFile ( DataFile(..), GroupMember(..),
-  GroupPrivilege(..), PrivilegeRule(..) )
 import qualified Sproxy.Application.Access as A
 import qualified Sproxy.Logging as Log
-
+import Sproxy.Server.DB.DataFile
+       (DataFile(..), GroupMember(..), GroupPrivilege(..),
+        PrivilegeRule(..))
 
 type Database = Pool SQLite.Connection
 
-data DataSource = PostgreSQL String | File FilePath
+data DataSource
+  = PostgreSQL String
+  | File FilePath
 
 {- TODO:
  - Hash remote tables and update the local only when the remote change
  - Switch to REGEX
  - Generalize sync procedures for different tables
  -}
-
 start :: FilePath -> Maybe DataSource -> IO Database
 start home ds = do
   Log.info $ "home directory: " ++ show home
-  db <- createPool    
-    (do c   <- SQLite.open $ home ++ "/sproxy.sqlite3"
-        lvl <- Log.level
-        SQLite.setTrace c (if lvl == Log.Debug then Just $ Log.debug . unpack else Nothing)
-        return c)
-    SQLite.close
-    1    -- stripes
-    3600 -- keep alive (seconds). FIXME: no much sense as it's a local file
-    128  -- max connections. FIXME: make configurable?
-
+  db <-
+    createPool
+      (do c <- SQLite.open $ home ++ "/sproxy.sqlite3"
+          lvl <- Log.level
+          SQLite.setTrace
+            c
+            (if lvl == Log.Debug
+               then Just $ Log.debug . unpack
+               else Nothing)
+          return c)
+      SQLite.close
+      1 -- stripes
+      3600 -- keep alive (seconds). FIXME: no much sense as it's a local file
+      128 -- max connections. FIXME: make configurable?
   withResource db $ \c -> SQLite.execute_ c "PRAGMA journal_mode=WAL"
   populate db ds
   return db
 
-
 userExists :: Database -> Text -> IO Bool
 userExists db email = do
-  r <- withResource db $ \c -> fmap SQLite.fromOnly <$> SQLite.queryNamed c
-    "SELECT EXISTS (SELECT 1 FROM group_member WHERE :email LIKE email LIMIT 1)"
-    [ ":email"  := email ]
+  r <-
+    withResource db $ \c ->
+      fmap SQLite.fromOnly <$>
+      SQLite.queryNamed
+        c
+        "SELECT EXISTS (SELECT 1 FROM group_member WHERE :email LIKE email LIMIT 1)"
+        [":email" := email]
   return $ head r
 
-
 userGroups_ :: SQLite.Connection -> Text -> Text -> Text -> Text -> IO [Text]
 userGroups_ c email domain path method =
-  fmap SQLite.fromOnly <$> SQLite.queryNamed c [q|
+  fmap SQLite.fromOnly <$>
+  SQLite.queryNamed
+    c
+    [q|
     SELECT gm."group" FROM group_privilege gp JOIN group_member gm ON gm."group"  = gp."group"
     WHERE :email LIKE gm.email
     AND gp.domain = :domain
@@ -77,12 +88,12 @@ userGroups_ c email domain path method =
       AND method = :method
       ORDER BY length(path) - length(replace(path, '/', '')) DESC LIMIT 1
     )
-  |] [ ":email"  := email -- XXX always in lower case
-     , ":domain" := toLower domain
-     , ":path"   := path
-     , ":method" := method -- XXX case-sensitive by RFC2616
-     ]
-
+  |]
+    [ ":email" := email -- XXX always in lower case
+    , ":domain" := toLower domain
+    , ":path" := path
+    , ":method" := method -- XXX case-sensitive by RFC2616
+    ]
 
 userAccess :: Database -> Text -> Text -> A.Inquiry -> IO [Text]
 userAccess db email domain inq = do
@@ -90,80 +101,85 @@ userAccess db email domain inq = do
         not . null <$> userGroups_ c email domain (A.path qn) (A.method qn)
   map fst <$> withResource db (\c -> filterM (permitted c) (HM.toList inq))
 
-
 userGroups :: Database -> Text -> Text -> Text -> Text -> IO [Text]
 userGroups db email domain path method =
   withResource db $ \c -> userGroups_ c email domain path method
 
-
 populate :: Database -> Maybe DataSource -> IO ()
-
 populate db Nothing = do
   Log.warn "db: no data source defined"
-  withResource db $ \c -> SQLite.withTransaction c $ do
-    createGroupMember c
-    createGroupPrivilege c
-    createPrivilegeRule c
-
+  withResource db $ \c ->
+    SQLite.withTransaction c $ do
+      createGroupMember c
+      createGroupPrivilege c
+      createPrivilegeRule c
 populate db (Just (File f)) = do
   Log.info $ "db: reading " ++ show f
   r <- decodeFileEither f
   case r of
-    Left e   -> Log.error $ f ++ ": " ++ show e
+    Left e -> Log.error $ f ++ ": " ++ show e
     Right df ->
-      withResource db $ \c -> SQLite.withTransaction c $ do
-        refreshGroupMembers c $ \st ->
-          mapM_ (\gm -> submit st (gmGroup gm, toLower $ gmEmail gm)
-                ) (groupMember df)
-
-        refreshGroupPrivileges c $ \st ->
-          mapM_ (\gp -> submit st (gpGroup gp, toLower $ gpDomain gp, gpPrivilege gp)
-                ) (groupPrivilege df)
-
-        refreshPrivilegeRule c $ \st ->
-          mapM_ (\pr -> submit st (toLower $ prDomain pr, prPrivilege pr, prPath pr, prMethod pr)
-                ) (privilegeRule df)
-
-
+      withResource db $ \c ->
+        SQLite.withTransaction c $ do
+          refreshGroupMembers c $ \st ->
+            mapM_
+              (\gm -> submit st (gmGroup gm, toLower $ gmEmail gm))
+              (groupMember df)
+          refreshGroupPrivileges c $ \st ->
+            mapM_
+              (\gp ->
+                 submit st (gpGroup gp, toLower $ gpDomain gp, gpPrivilege gp))
+              (groupPrivilege df)
+          refreshPrivilegeRule c $ \st ->
+            mapM_
+              (\pr ->
+                 submit
+                   st
+                   ( toLower $ prDomain pr
+                   , prPrivilege pr
+                   , prPath pr
+                   , prMethod pr))
+              (privilegeRule df)
 populate db (Just (PostgreSQL connstr)) =
-  void . forkIO . forever . flip finally (7 `minutes` threadDelay)
-  . logException $ do
+  void .
+  forkIO . forever . flip finally (7 `minutes` threadDelay) . logException $ do
     Log.info $ "db: synchronizing with " ++ show connstr
-    withResource db $ \c -> SQLite.withTransaction c $
-      bracket (PG.connectPostgreSQL $ pack connstr) PG.close $
-        \pg -> PG.withTransaction pg $ do
-
+    withResource db $ \c ->
+      SQLite.withTransaction c $
+      bracket (PG.connectPostgreSQL $ pack connstr) PG.close $ \pg ->
+        PG.withTransaction pg $ do
           Log.info "db: syncing group_member"
           refreshGroupMembers c $ \st ->
-            PG.forEach_ pg
-              [q|SELECT "group", lower(email) FROM group_member|] $ \r ->
-                submit st (r :: (Text, Text))
+            PG.forEach_ pg [q|SELECT "group", lower(email) FROM group_member|] $ \r ->
+              submit st (r :: (Text, Text))
           count c "group_member"
-
           Log.info "db: syncing group_privilege"
           refreshGroupPrivileges c $ \st ->
-            PG.forEach_ pg
+            PG.forEach_
+              pg
               [q|SELECT "group", lower(domain), privilege FROM group_privilege|] $ \r ->
-                submit st (r :: (Text, Text, Text))
+              submit st (r :: (Text, Text, Text))
           count c "group_privilege"
-
           Log.info "db: syncing privilege_rule"
           refreshPrivilegeRule c $ \st ->
-            PG.forEach_ pg
+            PG.forEach_
+              pg
               [q|SELECT lower(domain), privilege, path, method FROM privilege_rule|] $ \r ->
-                submit st (r :: (Text, Text, Text, Text))
+              submit st (r :: (Text, Text, Text, Text))
           count c "privilege_rule"
 
-
 -- FIXME short-cut for https://github.com/nurpax/sqlite-simple/issues/50
 -- FIXME nextRow is the only way to execute a prepared statement
 -- FIXME with bound parameters, but we don't expect any results.
 submit :: SQLite.ToRow values => SQLite.Statement -> values -> IO ()
-submit st v = SQLite.withBind st v $ void (SQLite.nextRow st :: IO (Maybe [Int]))
-
+submit st v =
+  SQLite.withBind st v $ void (SQLite.nextRow st :: IO (Maybe [Int]))
 
 createGroupMember :: SQLite.Connection -> IO ()
-createGroupMember c = SQLite.execute_ c [q|
+createGroupMember c =
+  SQLite.execute_
+    c
+    [q|
   CREATE TABLE IF NOT EXISTS group_member (
     "group" TEXT,
     email TEXT,
@@ -175,13 +191,16 @@ refreshGroupMembers :: SQLite.Connection -> (SQLite.Statement -> IO ()) -> IO ()
 refreshGroupMembers c a = do
   SQLite.execute_ c "DROP TABLE IF EXISTS group_member"
   createGroupMember c
-  SQLite.withStatement c
+  SQLite.withStatement
+    c
     [q|INSERT INTO group_member("group", email) VALUES (?, ?)|]
     a
 
-
 createGroupPrivilege :: SQLite.Connection -> IO ()
-createGroupPrivilege c = SQLite.execute_ c [q|
+createGroupPrivilege c =
+  SQLite.execute_
+    c
+    [q|
   CREATE TABLE IF NOT EXISTS group_privilege (
     "group" TEXT,
     domain TEXT,
@@ -190,17 +209,21 @@ createGroupPrivilege c = SQLite.execute_ c [q|
   )
 |]
 
-refreshGroupPrivileges :: SQLite.Connection -> (SQLite.Statement -> IO ()) -> IO ()
+refreshGroupPrivileges ::
+     SQLite.Connection -> (SQLite.Statement -> IO ()) -> IO ()
 refreshGroupPrivileges c a = do
   SQLite.execute_ c "DROP TABLE IF EXISTS group_privilege"
   createGroupPrivilege c
-  SQLite.withStatement c
+  SQLite.withStatement
+    c
     [q|INSERT INTO group_privilege("group", domain, privilege) VALUES (?, ?, ?)|]
     a
 
-
 createPrivilegeRule :: SQLite.Connection -> IO ()
-createPrivilegeRule c = SQLite.execute_ c [q|
+createPrivilegeRule c =
+  SQLite.execute_
+    c
+    [q|
   CREATE TABLE IF NOT EXISTS privilege_rule (
     domain TEXT,
     privilege TEXT,
@@ -210,26 +233,24 @@ createPrivilegeRule c = SQLite.execute_ c [q|
   )
 |]
 
-refreshPrivilegeRule :: SQLite.Connection -> (SQLite.Statement -> IO ()) -> IO ()
+refreshPrivilegeRule ::
+     SQLite.Connection -> (SQLite.Statement -> IO ()) -> IO ()
 refreshPrivilegeRule c a = do
   SQLite.execute_ c "DROP TABLE IF EXISTS privilege_rule"
   createPrivilegeRule c
-  SQLite.withStatement c
+  SQLite.withStatement
+    c
     [q|INSERT INTO privilege_rule(domain, privilege, path, method) VALUES (?, ?, ?, ?)|]
     a
 
-
 count :: SQLite.Connection -> String -> IO ()
 count c table = do
-  r <- fmap SQLite.fromOnly <$> SQLite.query_ c [qc|SELECT COUNT(*) FROM {table}|]
+  r <-
+    fmap SQLite.fromOnly <$> SQLite.query_ c [qc|SELECT COUNT(*) FROM {table}|]
   Log.info $ "db: " ++ table ++ " rows: " ++ show (head r :: Integer)
 
-
 logException :: IO () -> IO ()
-logException a = catch a $ \e ->
-  Log.error $ "db: " ++ show (e :: SomeException)
-
+logException a = catch a $ \e -> Log.error $ "db: " ++ show (e :: SomeException)
 
 minutes :: Int -> (Int -> IO ()) -> IO ()
 minutes us f = f $ us * 60 * 1000000
-
diff --git a/src/Sproxy/Server/DB/DataFile.hs b/src/Sproxy/Server/DB/DataFile.hs
index efac923..5708c96 100644
--- a/src/Sproxy/Server/DB/DataFile.hs
+++ b/src/Sproxy/Server/DB/DataFile.hs
@@ -1,69 +1,58 @@
 {-# LANGUAGE OverloadedStrings #-}
-module Sproxy.Server.DB.DataFile (
-  DataFile(..)
-, GroupMember(..)
-, GroupPrivilege(..)
-, PrivilegeRule(..)
-) where
+
+module Sproxy.Server.DB.DataFile
+  ( DataFile(..)
+  , GroupMember(..)
+  , GroupPrivilege(..)
+  , PrivilegeRule(..)
+  ) where
 
 import Control.Applicative (empty)
 import Data.Aeson (FromJSON, parseJSON)
 import Data.Text (Text)
 import Data.Yaml (Value(Object), (.:))
 
-
-data DataFile = DataFile {
-  groupMember    :: [GroupMember]
-, groupPrivilege :: [GroupPrivilege]
-, privilegeRule  :: [PrivilegeRule]
-} deriving (Show)
+data DataFile = DataFile
+  { groupMember :: [GroupMember]
+  , groupPrivilege :: [GroupPrivilege]
+  , privilegeRule :: [PrivilegeRule]
+  } deriving (Show)
 
 instance FromJSON DataFile where
-  parseJSON (Object m) = DataFile <$>
-        m .: "group_member"
-    <*> m .: "group_privilege"
-    <*> m .: "privilege_rule"
+  parseJSON (Object m) =
+    DataFile <$> m .: "group_member" <*> m .: "group_privilege" <*>
+    m .: "privilege_rule"
   parseJSON _ = empty
 
-
-data GroupMember = GroupMember {
-  gmGroup :: Text
-, gmEmail :: Text
-} deriving (Show)
+data GroupMember = GroupMember
+  { gmGroup :: Text
+  , gmEmail :: Text
+  } deriving (Show)
 
 instance FromJSON GroupMember where
-  parseJSON (Object m) = GroupMember <$>
-        m .: "group"
-    <*> m .: "email"
+  parseJSON (Object m) = GroupMember <$> m .: "group" <*> m .: "email"
   parseJSON _ = empty
 
-
-data GroupPrivilege = GroupPrivilege {
-  gpGroup     :: Text
-, gpDomain    :: Text
-, gpPrivilege :: Text
-} deriving (Show)
+data GroupPrivilege = GroupPrivilege
+  { gpGroup :: Text
+  , gpDomain :: Text
+  , gpPrivilege :: Text
+  } deriving (Show)
 
 instance FromJSON GroupPrivilege where
-  parseJSON (Object m) = GroupPrivilege <$>
-        m .: "group"
-    <*> m .: "domain"
-    <*> m .: "privilege"
+  parseJSON (Object m) =
+    GroupPrivilege <$> m .: "group" <*> m .: "domain" <*> m .: "privilege"
   parseJSON _ = empty
 
-
-data PrivilegeRule = PrivilegeRule {
-  prDomain    :: Text
-, prPrivilege :: Text
-, prPath      :: Text
-, prMethod    :: Text
-} deriving (Show)
+data PrivilegeRule = PrivilegeRule
+  { prDomain :: Text
+  , prPrivilege :: Text
+  , prPath :: Text
+  , prMethod :: Text
+  } deriving (Show)
 
 instance FromJSON PrivilegeRule where
-  parseJSON (Object m) = PrivilegeRule <$>
-        m .: "domain"
-    <*> m .: "privilege"
-    <*> m .: "path"
-    <*> m .: "method"
+  parseJSON (Object m) =
+    PrivilegeRule <$> m .: "domain" <*> m .: "privilege" <*> m .: "path" <*>
+    m .: "method"
   parseJSON _ = empty
-