[Zope] ImplicitAcquirerWrapper

[Chris McDonough]

Try this:

def makeThumbnail(self, imagename, width, height):

     # get the original large image
     oriImage = str(getattr(self, imagename))
     ##         ^^ note the str
     # convert it to a file
     oriFile = cStringIO.StringIO(oriImage.data)

Large file objects in Zope have "pdata" data attributes instead of 
strings, this is probably what you're seeing.  Running it through str 
solves the immediate issue.

Antwan Reijnen wrote:
> Hi all,
> 
> I encountered a problem when trying to generate thumbnails from large images. My code is based on a chunk from zopelabs:
> 
> 
> 
> def makeThumbnail(self, imagename, width, height):
> 
>    # get the original large image
>    oriImage = getattr(self, imagename)
>    
>    # convert it to a file  
>    oriFile = cStringIO.StringIO(oriImage.data)
>    
>    ... etcetera
> 
> 
> 
> It seems that oriImage.data is of <type 'string'> when a small image is passed, which is good. When a large image is used, the type of oriImage.data changes to <extension class Acquisition.ImplicitAcquirerWrapper>...
> 
> 
> 
> Is this a memoryproblem? Or even a memorybug? What is this Acquisition.ImplicitAcquirerWrapper class? 
> 
> I use Zope 2.3.3 on Redhat 7.1.
> 
> Appreciate any advice...
> 
> TIA, Antwan.
> 
> 
> 
> Antwan Reijnen
> 
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-- 
Chris McDonough                    Zope Corporation
http://www.zope.org             http://www.zope.com
"Killing hundreds of birds with thousands of stones"