Update feed handler to respond with atom+xml Content-Type; nix flake update

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "haskell-flake": {
       "locked": {
-        "lastModified": 1707835791,
-        "narHash": "sha256-oQbDPHtver9DO8IJCBMq/TVbscCkxuw9tIfBBti71Yk=",
+        "lastModified": 1728845985,
+        "narHash": "sha256-0KkAWCRBNpno3f+E1rvV9TOr0iuweqncWGn1KtbrGmo=",
         "owner": "srid",
         "repo": "haskell-flake",
-        "rev": "5113f700d6e92199fbe0574f7d12c775bb169702",
+        "rev": "2393b55948866f39afcfa7d8a53893a096bcd284",
         "type": "github"
       },
       "original": {
@@ -33,20 +33,14 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "dir": "lib",
-        "lastModified": 1706550542,
-        "narHash": "sha256-UcsnCG6wx++23yeER4Hg18CXWbgNpqNXcHIo5/1Y+hc=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "97b17f32362e475016f942bbdfda4a4a72a8a652",
-        "type": "github"
+        "lastModified": 1727825735,
+        "narHash": "sha256-0xHYkMkeLVQAMa7gvkddbPqpxph+hDzdu1XdGPJR+Os=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
       },
       "original": {
-        "dir": "lib",
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/fb192fec7cc7a4c26d51779e9bab07ce6fa5597a.tar.gz"
       }
     },
     "parts": {
@@ -54,11 +48,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1706830856,
-        "narHash": "sha256-a0NYyp+h9hlb7ddVz4LUn1vT/PLwqfrWYcHMvFB1xYg=",
+        "lastModified": 1727826117,
+        "narHash": "sha256-K5ZLCyfO/Zj9mPFldf3iwS6oZStJcU4tSpiXTMYaaL0=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "b253292d9c0a5ead9bc98c4e9a26c6312e27d69f",
+        "rev": "3d04084d54bedc3d6b8b736c70ef449225c361b1",
         "type": "github"
       },
       "original": {

sampu.cabal

@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            sampu
-version:         0.9.2
+version:         0.10.0
 license:         ISC
 author:          James Eversole
 maintainer:      james@eversole.co
@@ -23,6 +23,7 @@ executable sampu
                       , feed                  >= 1.3.2.0
                       , filemanip             >= 0.3.6.1
                       , filepath              >= 1.4.2.2
+                      , http-types
                       , lucid                 >= 2.11.0
                       , text                  >= 2.0
                       , time                  >= 1.12.0

src/Core/Handlers.hs

@@ -8,11 +8,13 @@ import           Fragments.Styles        as S
 
 import qualified Text.Atom.Feed          as Atom
 import           Control.Monad.IO.Class     (liftIO)
+import           Data.ByteString.Lazy       (ByteString)
 import qualified Data.Text               as T
 import qualified Data.Text.Lazy.Encoding as TLE
 import           Data.Time.Clock            (UTCTime(..), getCurrentTime)
 import           Data.Time.Format           (formatTime, defaultTimeLocale)
 import           Lucid                      (Html)
+import           Network.HTTP.Types         (status200, hContentType)
 import           System.Directory           (doesFileExist, getModificationTime)
 import           System.FilePath.Find       ( always, extension, fileName, find, (&&?)
                                             , (/~?), (==?) )
@@ -68,9 +70,15 @@ feed = do
     <*> fmap (\x -> timeFormat x) getCurrentTime
   feedData <- liftIO $ mapM (makePost baseUrl) postNames
   -- Send an XML response with an automatically populated Atom feed
-  send $ xml $ TLE.encodeUtf8 $ renderFeed
+  send $ atom 
+       $ TLE.encodeUtf8 
+       $ renderFeed
        $ autoFeed (baseFeed title time baseUrl) feedData
     where
+      -- Atom feed response headers
+      atom :: ByteString -> Response
+      atom f = withHeader (hContentType, "application/atom+xml") $ raw status200 [] $ f
+
       -- Base feed data structure which we populate with entries
       baseFeed :: String -> String -> String -> Atom.Feed
       baseFeed title time baseUrl = Atom.nullFeed