[Haskell-beginners] Beginners Digest, Vol 68, Issue 23

Tue Feb 25 14:05:25 UTC 2014

Good morning,

Re: Today's Topic 1 - see below.

My apology for not including the error message.

The following is what I did:
     I downloaded the source code and did the following [from the O'Reilly 
book]:
           1. download was done on a Mac.
           2. I saved the file to helloWorld.hs
           3. I went to my terminal screen and executed:
               runhaskell helloworld.hs
           4. on the terminal the following appeared:
               hell yeah
           5. so far, so good
           6. I went to my browser and entered the url:
               http://localhost:3000
           7. I was expecting to see the following on my browser:
               <!DOCTYPE html>
               <html><head><title></head><body>hell yeah</body></html>
            8. Unfortunately, I get the following message:
                "Safari can't connect to Server
                 Safari can't open page "http://localhost:3000" because
                 Safari can't connect to server "localhost"

Good day,
Patrick

----- Original Message ----- 
From: <beginners-request at haskell.org>
To: <beginners at haskell.org>
Sent: Tuesday, February 25, 2014 7:00 AM
Subject: Beginners Digest, Vol 68, Issue 23

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> Today's Topics:
>
>   1. Re:  Beginners Digest, Vol 68, Issue 22 (KMandPJLynch)
>   2. Re:  Beginners Digest, Vol 68, Issue 22 (Mateusz Kowalczyk)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 24 Feb 2014 20:32:40 -0500
> From: KMandPJLynch <kmandpjlynch at verizon.net>
> To: beginners at haskell.org
> Subject: Re: [Haskell-beginners] Beginners Digest, Vol 68, Issue 22
> Message-ID: <609E40BD-3267-4F21-88A6-1BDC4DEDC609 at verizon.net>
> Content-Type: text/plain; charset=us-ascii
>
> Good evening,
>
> I'm trying to learn how to implement Haskell on a web site.
> I've got the O'Reilly book: "Developing Web Applications with Haskell and 
> Yesod".
> I'd appreciate some guidance in regard to this.
> I'm having a bit of a problem getting the helloWorld.hs app up and running 
> on Yesod.
>
> Thank you
>
> On Feb 24, 2014, at 2:30 PM, beginners-request at haskell.org wrote:
>
>> Send Beginners mailing list submissions to
>> beginners at haskell.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://www.haskell.org/mailman/listinfo/beginners
>> or, via email, send a message with subject or body 'help' to
>> beginners-request at haskell.org
>>
>> You can reach the person managing the list at
>> beginners-owner at haskell.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Beginners digest..."
>>
>>
>> Today's Topics:
>>
>>   1.  Failure to install cabal-install. (Derek Mahar)
>>   2. Re:  Failure to install cabal-install. (Derek Mahar)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 24 Feb 2014 13:20:45 -0500
>> From: Derek Mahar <derek.mahar at gmail.com>
>> To: beginners at haskell.org
>> Subject: [Haskell-beginners] Failure to install cabal-install.
>> Message-ID:
>> <CABtfiZb7+p=DtGoz57GVXwgHCdK1vPL175UxmirRY1EXM4aEBA at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> How can I tell the Haskell compiler where to find module
>> Control.Monad.Error?  After building GHC 7.6.3 and Haskell Platform 
>> 2013.2
>> on Red Hat Linux 6, I found that 'cabal install cabal-install' fails when
>> it attempts to build library HTTP-4000.2.11 because the Haskell compiler
>> cannot find module Control.Monad.Error.
>>
>> *******************************************************
>> * Installation completed successfully.
>> *
>> * Programs installed into:
>> *   /usr/local/bin
>> *
>> * Now do "cabal update" to initialize the package list
>> *
>> * Additional packages may be found at http://hackage.haskell.org
>> * or via "cabal list <pattern>"
>> *
>> * Use "cabal install <foo>" to install additional packages
>> *
>> *******************************************************
>> [dmahar at dmahar haskell-platform-2013.2.0.0]$ cabal update
>> Downloading the latest package list from hackage.haskell.org
>> Note: there is a new version of cabal-install available.
>> To upgrade, run: cabal install cabal-install
>> [dmahar at dmahar haskell-platform-2013.2.0.0]$ cabal install cabal-install
>> Resolving dependencies...
>> Configuring HTTP-4000.2.11...
>> Building HTTP-4000.2.11...
>> Preprocessing library HTTP-4000.2.11...
>>
>> Network/Stream.hs:35:8:
>>    Could not find module `Control.Monad.Error'
>>    There are files missing in the `mtl-2.1.2' package,
>>    try running 'ghc-pkg check'.
>>    Use -v to see a list of the files searched for.
>> Failed to install HTTP-4000.2.11
>> cabal: Error: some packages failed to install:
>> HTTP-4000.2.11 failed during the building phase. The exception was:
>> ExitFailure 1
>> cabal-install-1.18.0.2 depends on HTTP-4000.2.11 which failed to install.
>>
>> Thank you,
>>
>> Derek
>> -------------- next part --------------
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>>
>> ------------------------------
>>
>> Message: 2
>> Date: Mon, 24 Feb 2014 14:30:14 -0500
>> From: Derek Mahar <derek.mahar at gmail.com>
>> To: beginners at haskell.org
>> Subject: Re: [Haskell-beginners] Failure to install cabal-install.
>> Message-ID:
>> <CABtfiZbF--Q93cx-GRHTU+FaX4+9d1uTSkoyb8E-N5e=c5Z4ow at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> On Mon, Feb 24, 2014 at 1:20 PM, Derek Mahar <derek.mahar at gmail.com> 
>> wrote:
>>
>>> [dmahar at dmahar haskell-platform-2013.2.0.0]$ cabal update
>>> Downloading the latest package list from hackage.haskell.org
>>> Note: there is a new version of cabal-install available.
>>> To upgrade, run: cabal install cabal-install
>>> [dmahar at dmahar haskell-platform-2013.2.0.0]$ cabal install cabal-install
>>> Resolving dependencies...
>>> Configuring HTTP-4000.2.11...
>>> Building HTTP-4000.2.11...
>>> Preprocessing library HTTP-4000.2.11...
>>>
>>> Network/Stream.hs:35:8:
>>>    Could not find module `Control.Monad.Error'
>>>    There are files missing in the `mtl-2.1.2' package,
>>>    try running 'ghc-pkg check'.
>>>    Use -v to see a list of the files searched for.
>>> Failed to install HTTP-4000.2.11
>>> cabal: Error: some packages failed to install:
>>> HTTP-4000.2.11 failed during the building phase. The exception was:
>>> ExitFailure 1
>>> cabal-install-1.18.0.2 depends on HTTP-4000.2.11 which failed to 
>>> install.
>>>
>>
>> 'ghc-pkg -v check' reports that my Haskell environment is missing many
>> files and that many of its packages are broken.  See the attached output 
>> of
>> 'ghc-pkg -v check'.
>>
>> Derek
>> -------------- next part --------------
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>>
>> ------------------------------
>>
>> Subject: Digest Footer
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>> End of Beginners Digest, Vol 68, Issue 22
>> *****************************************
>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 25 Feb 2014 01:56:01 +0000
> From: Mateusz Kowalczyk <fuuzetsu at fuuzetsu.co.uk>
> To: beginners at haskell.org
> Subject: Re: [Haskell-beginners] Beginners Digest, Vol 68, Issue 22
> Message-ID: <530BF831.50001 at fuuzetsu.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 25/02/14 01:32, KMandPJLynch wrote:
>> Good evening,
>>
>> I'm trying to learn how to implement Haskell on a web site.
>> I've got the O'Reilly book: "Developing Web Applications with Haskell and 
>> Yesod".
>> I'd appreciate some guidance in regard to this.
>> I'm having a bit of a problem getting the helloWorld.hs app up and 
>> running on Yesod.
>>
>> Thank you
>>
>
> Well, what's your problem? Saying that you have one doesn't help us help
> you ;). Paste in any relevant error messages that you can't figure out
> and post your system information.
>
> PS: Next time create a new thread instead of replying to an existing,
> irrelevant thread.
>
>
> -- 
> Mateusz K.
>
>
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> ------------------------------
>
> End of Beginners Digest, Vol 68, Issue 23
> ***************************************** 