how to get dynamic files?

Hello!

My method in a WAFileLibrary subclass returns dynamic contents (composes
it on the fly). But when I'm trying to download it (no matter how many
times) - the contents is the same as in the begining. Is it possible to
get a dynamically created file from WAFileLibrary so it could be
different for each request?

Thanks.


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Hi Oleg,

sure you can, i think you need to implement #documentForFile: or #documentAt:ifAbsent:. I think the first returns the data of the file while the second returns a WAResponse with the data and its mimetype.

Kind Regards
Karsten



Oleg Korsak wrote:

Hello!

My method in a WAFileLibrary subclass returns dynamic contents (composes
it on the fly). But when I'm trying to download it (no matter how many
times) - the contents is the same as in the begining. Is it possible to
get a dynamically created file from WAFileLibrary so it could be
different for each request?

Thanks.

  

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Tel: +49 3496 21 43 29
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Hi Oleg,

Here is how I return dynamic content:

renderContentOn: html

        html anchor
                callback: [self returnCSV];
                with: 'Export CVS file to Excel';
                yourself.

returnCSV

        | response |
        response := WAResponse
                document: self asCSV
                mimeType: (WAFileLibrary mimetypeFor: 'csv')
                fileName: caption , ' (' , DateAndTime now printString , ').csv'.
        response doNotCache.
        self session returnResponse: response.

Hope that helps,

James Foster

On Feb 24, 2009, at 5:02 PM, Oleg Korsak wrote:

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> My method in a WAFileLibrary subclass returns dynamic contents (composes
> it on the fly). But when I'm trying to download it (no matter how many
> times) - the contents is the same as in the begining. Is it possible to
> get a dynamically created file from WAFileLibrary so it could be
> different for each request?

WAFileLibrary sets the header fields so that the browser can cache the
files. That's why you don't see any changes. Better write a custom
WARequestHandler subclass to create dynamic content.

Lukas

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http://www.lukas-renggli.ch
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Oleg Korsak wrote: Hi, in the squeaksource/Jetsam package you will find WAStandardFilePlus
which if you subclass, the #documentClass is set to #NonCachedDocument


Keith
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