RE: [Zope] picture as parameter for an external method / thumbnail

11 Oct 2004

      Hi

You are right Dragos !  Your code is working fine with the read() method
and the picture is well provided to the external method.

Many thanks to you and Tino.

I have now added some extra code in the external method to create a
thumbnail from the picture.  But unfortunately the same
"exceptions.assertionError" happens again  :- ( (

If i'm only leaving the first real code line (getattr), the error already
appear.

Creating a thumbnail seems to be something tricky as another user of zope
community had also somme problems (other errors message) with that matter
this morning...

Any hint ?   Anyway thanks for the help !

def makethumbnail(self, original_id):

   from PIL import Image
   from StringIO import StringIO
   import os.path

   # create a thumbnail image file
   original_image=getattr(self, original_id)
   original_file=StringIO(str(original_image.data))
   image=Image.open(original_file)
   image=image.convert('RGB')
   image.thumbnail((size,size))
   thumbnail_file=StringIO()
   image.save(thumbnail_file, "JPEG")
   thumbnail_file.seek(0)

   # create an id for the thumbnail
   path, ext=os.path.splitext(original_id)
   thumbnail_id=path + '.thumb.jpg'

   # if there's and old thumbnail, delete it
   if thumbnail_id in self.objectIds():
      self.manage_delObjects([thumbnail_id])

   # create the Zope image object IN MY OWN LOCAL FILE SYSTEM

self.phvfs.manage_addProduct['OFSP'].manage_addImage(thumbnail_id,thumbnai
l_file,'thumbnail image')
   thumbnail_image=getattr(self, thumbnail_id)

   # set the 'originial_id' property
   thumbnail_image.manage_addProperty('original_id', original_id,
'string')

REGARDS

Ph.

-----Original Message-----
From: Dragos Chirila [mailto:d.chirila@finsiel.ro]
Sent: lundi 11 octobre 2004 17:20
To: zope@zope.org; VIGNAUX Philippe
Subject: Re: [Zope] picture as parameter for an external method

Hi

I just simulate your situation and it works great.

I attached the picture.zexp file that generates a folder with :
	upload_html - page template
	py_test - python script
	my_external_function - external method

The my_external_function.py from extensions contains just:

def my_external_function(self, picture):
      print type(picture)
      print picture

I tested it on Zope 2.5.1 and 2.6.4.

Hope this will help.

Dragos

VIGNAUX Philippe wrote:
...
Thanks for your help Tino,
1) For clarity purpose here is the whole page template
<html>
<head>
<title> Titre </title>
</head>
<body>
<form action="py_test" enctype='multipart/form-data' method='post'>
<input type="file" name="filename">
<br><br>
<input type="submit" name="toto">
</form>
</body>
</html>
2) here is the python script "py_test"
request=context.REQUEST
context.my_external_function( original_id=request['filename'] )
#context.my_external_function(
original_id=request.form.get('filename') )
#context.my_external_function( request['filename'] )
!!nb: the 2 commented lines do not change anything to the error message
...
3) my_external_function
def my_external_function (self, original_id):
     pass
Of course this external method is supposed to do much more.  I hope to
be
able to create thumbnail (as an example seen in the zope book).  But i
have simplified it as much as possible to see where the problem was
located.  I'm sure i ll have other problems to create the thumbnails ...
: - )   but the real problem at this time is to pass a picture to the
exernal method ...
Regards
Ph.
-----Original Message-----
From: Tino Wildenhain [mailto:tino@wildenhain.de]
Sent: lundi 11 octobre 2004 12:53
To: VIGNAUX Philippe
Cc: zope@zope.org
Subject: Re: [Zope] picture as parameter for an external method
On Mon, 2004-10-11 at 11:58, VIGNAUX Philippe wrote:
...
Hi !
Is there a way to pass a picture (extension JPG)  as a parameter of an
external method.
It seem to be the case as read on the internet but for me it doesnÿt
work !
My zope config :  Zope 2.6.4 (binary release, python 2.1, win32-x86),
python 2.1.3, win32
This is the problem :
1) Iÿve got a page template where I can choose a picture thru a
« file » object :
<input type="file" name="filename">
Did you adjust enctype accordingly?
...
2) This page template calls a python scripts
Calls? The Template is target of the POST request
too?
...
request=context.REQUEST
context.my_external_function( original_id=request['filename'] )
#context.my_external_function( request['filename'] )
if you do it the right way[tm] (see the enctype you can borrow
from any ZMI HTML source which has a file upload)
request.form.get('filename') will give you a file object.
(If you return from form of course)
...
3) my_external_function is defined in an appropiate module in the
« Extensions » folder of my zope installation
def my_external_function (self, original_id):
pass
This is all?
...
PROBLEM :   when i run the process i get an error :
exceptions.AssertionError
Sorry, a site error occurred.
Traceback (innermost last):
* Module ZPublisher.Publish, line 150, in publish_module
     * Module ZPublisher.Publish, line 106, in publish
     * Module Zope.App.startup, line 225, in abort
     * Module ZODB.Transaction, line 135, in abort
     * Module ZODB.Connection, line 256, in abort
When i configure the whole thing to pass a normal parameter (text), it
works normally ;  so obviously the problem is when trying to pass a
picture.
This might be related to the enctype. Try it first I'd say.
What is your external method supposed to do?
Regards
Tino
###########################################
This message has been scanned by ICT - Africa Museum
_______________________________________________
Zope maillist  -  Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
**   No cross posts or HTML encoding!  **
(Related lists -
 http://mail.zope.org/mailman/listinfo/zope-announce
 http://mail.zope.org/mailman/listinfo/zope-dev )
-- 
Dragos Chirila
Programmer, Finsiel ROMANIA
44A, Ficusului St. - 71544 Bucharest
Tel: +40 21 2320193
Fax: +40 21 2329807
URL: http://www.finsiel.ro
Jabber: dragos@jabber.finsiel.ro
###########################################

This message has been scanned by ICT - Africa Museum

VIGNAUX Philippe

tags

participants (1)