Use base64 instead of base64-bytestring.

It is supposed to be faster and more standards-compliant.

pandoc.cabal

@@ -474,7 +474,6 @@ library
                  aeson-pretty          >= 0.8.9    && < 0.9,
                  array                 >= 0.5      && < 0.6,
                  attoparsec            >= 0.12     && < 0.15,
-                 base64-bytestring     >= 0.1      && < 1.3,
                  binary                >= 0.7      && < 0.11,
                  blaze-html            >= 0.9      && < 0.10,
                  blaze-markup          >= 0.8      && < 0.9,
@@ -491,6 +490,7 @@ library
                  directory             >= 1.2.3    && < 1.4,
                  doclayout             >= 0.4      && < 0.5,
                  doctemplates          >= 0.10     && < 0.11,
+                 base64                >= 0.4      && < 0.5,
                  emojis                >= 0.1      && < 0.2,
                  exceptions            >= 0.8      && < 0.11,
                  file-embed            >= 0.0      && < 0.1,

src/Text/Pandoc/Class/IO.hs

@@ -36,7 +36,7 @@ module Text.Pandoc.Class.IO
 
 import Control.Monad.Except (throwError)
 import Control.Monad.IO.Class (MonadIO, liftIO)
-import Data.ByteString.Base64 (decodeLenient)
+import Data.ByteString.Base64.URL (decodeBase64Lenient)
 import Data.ByteString.Lazy (toChunks)
 import Data.Text (Text, pack, unpack)
 import Data.Time (TimeZone, UTCTime)
@@ -125,7 +125,7 @@ openURL u
      let mime     = T.takeWhile (/=',') u''
      let contents = UTF8.fromString $
                      unEscapeString $ T.unpack $ T.drop 1 $ T.dropWhile (/=',') u''
-     return (decodeLenient contents, Just mime)
+     return (decodeBase64Lenient contents, Just mime)
  | otherwise = do
      let toReqHeader (n, v) = (CI.mk (UTF8.fromText n), UTF8.fromText v)
      customHeaders <- map toReqHeader <$> getsCommonState stRequestHeaders

src/Text/Pandoc/Readers/FB2.hs

@@ -25,7 +25,7 @@ TODO:
 module Text.Pandoc.Readers.FB2 ( readFB2 ) where
 import Control.Monad.Except (throwError)
 import Control.Monad.State.Strict
-import Data.ByteString.Base64.Lazy
+import Data.ByteString.Lazy.Base64.URL
 import Data.Functor
 import Data.List (intersperse)
 import qualified Data.Map as M
@@ -202,7 +202,7 @@ parseBinaryElement e =
       report $ IgnoredElement "binary without content-type attribute"
     (Just filename, contentType) ->
       insertMedia (T.unpack filename) contentType
-                    (decodeLenient
+                    (decodeBase64Lenient
                       (UTF8.fromTextLazy . TL.fromStrict . strContent $ e))
 
 -- * Type parsers

src/Text/Pandoc/Readers/HTML.hs

@@ -27,7 +27,7 @@ import Control.Applicative ((<|>))
 import Control.Monad (guard, msum, mzero, unless, void)
 import Control.Monad.Except (throwError, catchError)
 import Control.Monad.Reader (ask, asks, lift, local, runReaderT)
-import Data.ByteString.Base64 (encode)
+import Data.Text.Encoding.Base64.URL (encodeBase64)
 import Data.Char (isAlphaNum, isLetter)
 import Data.Default (Default (..), def)
 import Data.Foldable (for_)
@@ -785,8 +785,7 @@ pSvg = do
   contents <- many (notFollowedBy (pCloses "svg") >> pAny)
   closet <- TagClose "svg" <$ (pCloses "svg" <|> eof)
   let rawText = T.strip $ renderTags' (opent : contents ++ [closet])
-  let svgData = "data:image/svg+xml;base64," <>
-                   UTF8.toText (encode $ UTF8.fromText rawText)
+  let svgData = "data:image/svg+xml;base64," <> encodeBase64 rawText
   return $ B.imageWith (ident,cls,[]) svgData mempty mempty
 
 pCodeWithClass :: PandocMonad m => Text -> Text -> TagParser m Inlines

src/Text/Pandoc/SelfContained.hs

@@ -19,7 +19,7 @@ import Codec.Compression.GZip as Gzip
 import Control.Applicative ((<|>))
 import Control.Monad.Trans (lift)
 import Data.ByteString (ByteString)
-import Data.ByteString.Base64
+import Data.ByteString.Base64.URL (encodeBase64)
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy as L
 import qualified Data.Text as T
@@ -45,7 +45,7 @@ makeDataURI :: (MimeType, ByteString) -> T.Text
 makeDataURI (mime, raw) =
   if textual
      then "data:" <> mime' <> "," <> T.pack (escapeURIString isOk (toString raw))
-     else "data:" <> mime' <> ";base64," <> toText (encode raw)
+     else "data:" <> mime' <> ";base64," <> encodeBase64 raw
   where textual = "text/" `T.isPrefixOf` mime
         mime' = if textual && T.any (== ';') mime
                    then mime <> ";charset=utf-8"

src/Text/Pandoc/Writers/FB2.hs

@@ -21,14 +21,13 @@ module Text.Pandoc.Writers.FB2 (writeFB2)  where
 import Control.Monad (zipWithM)
 import Control.Monad.Except (catchError, throwError)
 import Control.Monad.State.Strict (StateT, evalStateT, get, gets, lift, liftM, modify)
-import Data.ByteString.Base64 (encode)
+import Data.ByteString.Base64.URL (encodeBase64)
 import Data.Char (isAscii, isControl, isSpace)
 import Data.Either (lefts, rights)
 import Data.List (intercalate)
 import Data.Text (Text)
 import qualified Data.Text as T
 import qualified Data.Text.Lazy as TL
-import qualified Data.Text.Encoding as TE
 import Text.Pandoc.Network.HTTP (urlEncode)
 import Text.Pandoc.XML.Light as X
 
@@ -237,7 +236,7 @@ fetchImage href link = do
                                report $ CouldNotDetermineMimeType link
                                return Nothing
                              Just mime -> return $ Just (mime,
-                                                      TE.decodeUtf8 $ encode bs))
+                                                        encodeBase64 bs))
                     (\e ->
                        do report $ CouldNotFetchResource link (tshow e)
                           return Nothing)