Re: [Haskell-beginners] confused by <-

On Thu, Sep 27, 2012 at 7:38 PM, Bryce Verdier wrote:

On 9/27/12 10:33 AM, Brent Yorgey wrote:

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On Thu, Sep 27, 2012 at 10:01:25AM -0700, Bryce Verdier wrote:

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On 9/26/12 6:00 PM, Ertugrul Söylemez wrote:

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Bryce Verdier wrote:

body <- L.try (simpleHttp "http://www.google.com") :: IO (Either

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L.SomeException Data.ByteString.Lazy.Internal.**ByteString)

Almost right, but your type signature is lying. =)

Greets, Ertugrul

Thanks for your hint, with a fair amount of head bashing against a wall I was able to figure this out. At the end of day I got :

body <- try (simpleHttp "http://www.google.com") :: GHandler PlayHaven PlayHaven (Either SomeException ByteString)

Do you need a type signature there at all?

-Brent

That is an awesome question. Originally I tried:

body <- try (simpleHttp "http://www.google.com")

this can be made to work by adding less stuff :

getGoogR = do body <- try (simpleHttp "http://www.google.com") case body of Left (SomeException _) -> jsonToRepJson $ object ["response" .= ( show "ERROR: NO DATA FOR ONE REASON OR ANOTHER")] Right val -> jsonToRepJson $ object ["response" .= (showDigest $ sha1 val)]

I think that should work... -- Jedaï