[Haskell-cafe] how to inject another source into conduit

[Michael Snoyman]

I don't think there's enough information in the snippet you've given to
determine what the problem is. And in general, it's a good idea to include
the actual error message from the compiler.


On Mon, Nov 12, 2012 at 5:02 AM, Alexander V Vershilov <
alexander.vershilov at gmail.com> wrote:

> Hello.
>
> I have problems with writing next code (using network-conduit)
>
> slightly simplified version:
>
> > app ad = appSource ad $$ sink
> >   where
> >     cMap = M.fromList [ ("upload", cmdUpload), ("download", cmdDownload)
> ]
> >     sink = takeLine >>= \c -> case c of Just run -> run ; Nothing ->
> return ()
> >     cmdUpload = {- ... -} CB.sinkFile path
> >     cmdDownload = do
> >         {- code here -}
> >         CB.sourceFile path $$ appSink ad  -- this will not work because
> of
> >                                           -- type error
>
> And I'm catching "cannot construct the infinite type".
>
> I've found an example in [1], but it's not exactly solves my problem, as
> all
> the logic is inside conduit, and it will break upload function.
>
> [1] http://www.yesodweb.com/blog/2012/06/conduit-0-5
>
> --
> Alexander Vershilov
>
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>
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