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haskellunicodecjkwritefile

Prelude.writeFile with a Chinese file name

I'm testing something that like to output content to file, which has a Chinese name.

The file would be created successfully with right content but not file name.

I take a look at the function writeFile^1 and it represents file name using String. So I suspect this might be root cause.

    file :: FilePath
    file = "上海万达影城.html"

    content :: String
    content = "<h1>hello</h1>"

    write2File :: IO ()
    write2File = writeFile file content

Thanks your help!

-Simon

--------------------- Updated

  1. GHC at my side is 7.0.2

  2. A workaround found before upgrade. see detail below and the code change like

    import qualified Codec.Binary.UTF8.String as UTF8
file = UTF8.encodeString "上海万达影城.html"
Solution

  • String is a list of unicode code points in Haskell. The interpretation of that list of unicode code points is system dependent. (You also need a not too old GHC to support this).

    Generally though, once you're locale is set correctly, things just work.

    N.B. there have been caveats in the past -- e.g. the old bug: System.Directory.getDirectoryContents unicode support - which might involve workarounds.