[frame] prefetch codimd doc first, before downloading it

Otherwise, if doc wasn't visited yet, codimd returns some large HTML
page.

src/Gargantext/Database/Admin/Types/Hyperdata/Frame.hs

@@ -14,11 +14,10 @@ Portability : POSIX
 module Gargantext.Database.Admin.Types.Hyperdata.Frame
   where
 
-import Control.Lens
 import Data.ByteString.Lazy (toStrict)
 import Data.Text qualified as T
 import Gargantext.Database.Admin.Types.Hyperdata.Prelude
-import Gargantext.Prelude hiding (toStrict)
+import Gargantext.Prelude ( ($), Show, Applicative(pure), IO, (.), (&), decodeUtf8 )
 import Network.Wreq qualified as Wreq
 
 ------------------------------------------------------------------------
@@ -62,7 +61,12 @@ instance ToSchema HyperdataFrame where
 
 getHyperdataFrameContents :: HyperdataFrame -> IO Text
 getHyperdataFrameContents (HyperdataFrame { _hf_base, _hf_frame_id }) = do
-  let path = T.concat [_hf_base, "/", _hf_frame_id, "/download"]
+  let path = T.intercalate "/" [_hf_base, _hf_frame_id, "download"]
+  -- We need to issue a request to this frame, because it might not
+  -- have been fetched yet and in that case codimd returns some ugly
+  -- HTML
+  -- See issue https://gitlab.iscpif.fr/gargantext/haskell-gargantext/issues/333
+  _ <- Wreq.headWith Wreq.defaults $ T.unpack path
   r <- Wreq.get $ T.unpack path
   pure $ decodeUtf8 $ toStrict $ r ^. Wreq.responseBody