Fix tests & restore Common handlers

src/Handler/Common.hs

@@ -1,10 +1,26 @@
 -- | Common handler functions.
 module Handler.Common where
 
-import Import
+import Data.FileEmbed (embedFile)
+import Import hiding (embedFile)
 
-getFaviconR :: Handler ()
-getFaviconR = redirectWith movedPermanently301 $ StaticR favicon_ico
+-- These handlers embed files in the executable at compile time to avoid a
+-- runtime dependency, and for efficiency.
 
-getRobotsR :: Handler ()
-getRobotsR = redirectWith movedPermanently301 $ StaticR robots_txt
+getFaviconR :: Handler TypedContent
+getFaviconR = do
+  let content = $(embedFile "static/favicon.ico")
+
+  setEtagHashable content
+
+  return $ TypedContent "image/x-icon"
+         $ toContent content
+
+getRobotsR :: Handler TypedContent
+getRobotsR = do
+  let content = $(embedFile "static/robots.txt")
+
+  setEtagHashable content
+  
+  return $ TypedContent typePlain
+         $ toContent content

src/Utils.hs

@@ -73,8 +73,6 @@ import Data.Ratio ((%))
 
 import qualified Data.Binary as Binary
 
-import qualified Data.ByteString.Base64.URL as Base64 (encode)
-
 import Network.Wai (requestMethod)
 
 import Data.Time.Clock
@@ -778,7 +776,7 @@ setLastModified lastModified = do
   when (rMethod `elem` safeMethods) $ do
     ifModifiedSince <- (=<<) (parseTimeM True defaultTimeLocale "%a, %d %b %Y %X %Z" . unpack <=< either (const Nothing) Just . Text.decodeUtf8') <$> lookupHeader "If-Modified-Since"
     $logDebugS "LastModified" $ tshow (lastModified, ifModifiedSince)
-    when (maybe False ((lastModified <=) . addUTCTime precision) ifModifiedSince) $
+    when (maybe False ((lastModified <=) . addUTCTime precision) ifModifiedSince)
       notModified
   
   addHeader "Last-Modified" $ formatRFC1123 lastModified