[Zope] Artificially create a fileupload instance or batch convert ExtImages

[Tim Hicks]

<Gregor: mailed you directly coz you saved my bacon on something very
related last time :-)>

Is there an easy way to create a fileupload instance from a string?  I am
trying to batch convert a load of ExtImage files to give them all different
sized preview images, but manage_addExtImage() doesn't accept a string.

Alternatively, if anyone has a better way to achieve what I want, I'm very
much open to suggestions.

Here's the script I've got.
----
for old_folder in container.photos.objectValues(['Folder']):
  container.manage_addFolder(old_folder.getId())
  new_folder = container[old_folder.getId()]
  for extimage in old_folder.objectValues(['ExtImage']):

new_folder.manage_addProduct['ExtFile'].manage_addExtImage(id=extimage.getId
(), title=extimage.title, file=extimage.index_html(), create_prev=1,
maxx=400, maxy=400, ratio=1)
----

Running it gives me:

Error Type: TypeError
Error Value: open, argument 1: expected string without null bytes, string
found

<see traceback below>



Traceback (innermost last):
  File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 223, in
publish_module
  File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 187, in
publish
  File C:\PROGRA~1\zope233\lib\python\Zope\__init__.py, line 221, in
zpublisher_exception_hook
    (Object: Traversable)
  File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 171, in
publish
  File C:\PROGRA~1\zope233\lib\python\ZPublisher\mapply.py, line 160, in
mapply
    (Object: resizer)
  File C:\PROGRA~1\zope233\lib\python\ZPublisher\Publish.py, line 112, in
call_object
    (Object: resizer)
  File C:\PROGRA~1\zope233\lib\python\Shared\DC\Scripts\Bindings.py, line
324, in __call__
    (Object: resizer)
  File C:\PROGRA~1\zope233\lib\python\Shared\DC\Scripts\Bindings.py, line
354, in _bindAndExec
    (Object: resizer)
  File
C:\PROGRA~1\zope233\lib\python\Products\PythonScripts\PythonScript.py, line
336, in _exec
    (Object: resizer)
    (Info: ({'script': &lt;PythonScript instance at 014B3F20&gt;, 'context':
&lt;BTreeFolder instance at 0CC01490&gt;, 'container': &lt;BTreeFolder
instance at 0CC01490&gt;, 'traverse_subpath': []}, (), {}, None))
  File Script (Python), line 6, in resizer
    (Object: Traversable)
  File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtImage.py, line 88,
in manage_addExtImage
    (Object: Traversable)
  File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtImage.py, line
321, in manage_file_upload
    (Object: CatalogAware)
  File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtFile.py, line 371,
in manage_file_upload
    (Object: CatalogAware)
  File C:\PROGRA~1\zope233\lib\python\Products\ExtFile\ExtFile.py, line 466,
in _copy
    (Object: CatalogAware)
TypeError: (see above)