[Zope] Workflow question

Wed Aug 17 17:08:36 EDT 2005

Hi Dieter. Many thanks for your reply. The place in my workflow that it 
failed was opening the image.

IOError: cannot identify image file

		for image_data in image_data_list:

			# Get original image data into string object
			original_file = StringIO(str(image_obj.data))
			image_size_px = image_data['size']

			# Create an image instance
error here -->	image = PIL.Image.open(original_file)

This had me puzzled since my workflow works in all other cases in the 
portal including cutting an image from one folder and pasting into the 
folder the workflow acts on (just not FTP case). So I wrote a very 
simple workflow script that will only cut and paste an image back in 
same folder to see what would happen:

# Get the object and its id
image_obj = state_change.object
id = image_obj.getId()

# This is the folder we are starting from
upload_dir = image_obj.aq_parent

# Do cut and paste
objs = upload_dir.manage_cutObjects([id])
upload_dir.manage_pasteObjects(objs)

return

I discovered that it does not appear possible to have a workflow act on 
content immediately after being FTP'd to a site without generating the 
'FTP 426 Error creating file' error.  If I FTP an image to the folder 
as Manager with copy or move permission, it will trigger 426 Error 
creating file and the following traceback.  The workflow will work for 
regular operations within the portal, just not FTP.

     *  Module OFS.CopySupport, line 92, in manage_cutObjects

Copy Error: <HTML> <HEAD> <TITLE>Not Supported</TITLE> </HEAD> <BODY 
BGCOLOR="#FFFFFF"> <FORM ACTION="manage_main" METHOD="GET" > <TABLE 
BORDER="0" WIDTH="100%" CELLPADDING="10"> <TR> <TD VALIGN="TOP"> <BR> 
<CENTER><B><FONT SIZE="+6" COLOR="#77003B">!</FONT></B></CENTER> </TD> 
<TD VALIGN="TOP"> <BR><BR> <CENTER> The action against the 
<em>A084.JPG</em> object could not be carried out. One of the following 
constraints caused the problem: <br><br>The object does not support 
this operation.<br><br>-- OR --<br><br>The currently logged-in user 
does not have the <b>Copy or Move</b> permission respective to the 
object. </CENTER> </TD> </TR> <TR> <TD VALIGN="TOP"> </TD> <TD 
VALIGN="TOP"> <CENTER> <INPUT TYPE="SUBMIT" VALUE=" Ok "> </CENTER> 
</TD> </TR> </TABLE> </FORM> </BODY></HTML>

The body of the image appears in my traceback as well

My folders work fine with FTP without the workflow - no errors.  Only 
generates errors when workflow is attached to type it acts on and then 
426 error appears.

Regards,
David

On Wednesday, August 17, 2005, at 05:07 PM, Dieter Maurer wrote:

> David Pratt wrote at 2005-8-17 00:13 -0300:
>> ...
>> but when I FTP
>> my images to this directory it fails giving me a 426 Error creating
>> file.
>
> Look at your "error_log" object to find out the real reason
> (and get the traceback).
>
>
> -- 
> Dieter
>