[racket] Writing a file from a web servlet

Also use define-runtime-path to have stable path references.

Jay

Sent from my iPhone

On Jun 9, 2010, at 11:46 AM, Noel Welsh <noelwelsh at gmail.com> wrote:

> This should work, so either the file is being written in an unexpected
> location or the save-costs function is not be called. You could
> diagnose the later with a simple printf statement. You could also try
> a minimal servlet to ensure the file is being written in the location
> you expect.
>
> HTH,
> N.
>
> On Wed, Jun 9, 2010 at 4:36 PM, Curtis Dutton <curtdutt at gmail.com>  
> wrote:
>> I have a very simple web servlet application that tries to write  
>> data to a
>> file as a sort of miniature database.
>> Here is the code that writes the file.
>> (define (save-costs costs)
>>   (with-output-to-file
>>       file-name
>>       (lambda ()
>>         (write (serialize costs)))
>>     #:exists 'truncate
>>     #:mode 'text))
>>
>> In normal scheme this code works fine and creates the file  
>> "costs.dat" and
>> everything is merry.
>> Inside the web server it does not create the file anywhere or  
>> update it
>> thought the code executes without error.
>> The web server is able to read the file on startup, just not write  
>> it.
>> What am I doing wrong here?
>>
>> Thanks,
>>      Curtis
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