[Zope] Resizing an Image with PIL via a Form Upload
I'm trying to resize an image uploaded from a form using PIL. I got it
to work on an existing image but I can't seem to get it to work on an
image that's uploaded through the form. The ID of the file I'm trying to
upload is DSCF0004.jpg. The form, script and traceback are listed
below. Thanks in advance.
form action=processed/imgSizer method=post
enctype=multipart.form-data
input type=file name=original_id input type=submit
name=submit value= Add
/form
(imgSizer External Method)
1 def makeImages(self, original_id):
2
3import PIL.Image
4import PIL
5from StringIO import StringIO
6import os.path
7
8original_image=getattr(self, original_id)
9original_file=StringIO(str(original_image.data))
...
returns:
Traceback (innermost last):
* Module ZPublisher.Publish, line 115, in publish
* Module ZPublisher.mapply, line 88, in mapply
* Module ZPublisher.Publish, line 41, in call_object
* Module Products.ExternalMethod.ExternalMethod, line 225, in __call__
__traceback_info__: ((Folder at /dev/imgtest/processed,
'DSCF0004.jpg'), {}, None)
* Module .../Zope/Extensions/imgSizer.py, line 9, in makeImages
AttributeError: DSCF0004.jpg
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Re: [Zope] Resizing an Image with PIL via a Form Upload
Jusst a shot in the dark: can you try to use a name without a dot inside? -- Marco Bizzarri http://iliveinpisa.blogspot.com/ ___ 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 )
Re: [Zope] Resizing an Image with PIL via a Form Upload
- Original Message - From: Tom Von Lahndorff [EMAIL PROTECTED] To: zope@zope.org Sent: Thursday, February 22, 2007 1:29 PM Subject: [Zope] Resizing an Image with PIL via a Form Upload I'm trying to resize an image uploaded from a form using PIL. I got it to work on an existing image but I can't seem to get it to work on an image that's uploaded through the form. The ID of the file I'm trying to upload is DSCF0004.jpg. The form, script and traceback are listed below. Thanks in advance. form action=processed/imgSizer method=post enctype=multipart.form-data input type=file name=original_id input type=submit name=submit value= Add /form (imgSizer External Method) 1 def makeImages(self, original_id): 2 3import PIL.Image 4import PIL 5from StringIO import StringIO 6import os.path 7 8original_image=getattr(self, original_id) 9original_file=StringIO(str(original_image.data)) just a guess, but i don't think getattr is returning what you think it is returning. The image has not been 'stored' anywhere yet, it is just a FileUpload instance. To get at the information in this instance: # the var name used in your form is misleading, it is not just the image id fileName = self.REQUEST['original_id'].filename fileData = self.REQUEST['original_id'].read() hth Jonathan ___ 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 )
Re: [Zope] Resizing an Image with PIL via a Form Upload
On Feb 22, 2007, at 1:29 PM, Tom Von Lahndorff wrote: 8original_image=getattr(self, original_id) 9original_file=StringIO(str(original_image.data)) [and later] AttributeError: DSCF0004.jpg I think your line numbers are off by one, because I'd think it is the getattr that would be causing the Attribute Error (at most, line 9 could give an attribute error for something called data. Zope turns file upload objects into ZPublisher.HTTPRequest.FileUpload instances. and pass them to your method. FileUpload instances have an interface similar to python file objects, you can .read(), .seek(), .close() or do whatever you want to them and might not need to wrap the contents into a StringIO object first. (your trying to fetch the file as an attribute of self seems to imply that you think the form data is already uploaded into zope and is an Image object in a folder. It isn't there yet, and won't be unless you store it there.) I think if you removed lines 8 and 9 (by your numbering) and renamed the second argument to the method to original_file, things would work as you need: 1 def makeImages(self, original_file): 2 3import PIL.Image 4import PIL 5import os.path 6 ... ___ 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 )
Re: [Zope] Resizing an Image with PIL via a Form Upload
Thanks for everyone's help. I got it to work, here's the script. It
creates 4 images, enhances them and adds some properties to the
largest one.
--
def makeImages(self, imagefile, newkeywords, newcaption):
import PIL.Image, ImageEnhance, ImageFilter
import PIL
from StringIO import StringIO
import os.path
import datetime
import time
# create the data in a new PIL Image.
image=PIL.Image.open(imagefile)
image=image.convert('RGB')
image=image.filter(ImageFilter.SHARPEN)
image=image.resize((640, 480), PIL.Image.ANTIALIAS)
image2=image.resize((320, 240), PIL.Image.ANTIALIAS)
image3=image.resize((160, 120), PIL.Image.ANTIALIAS)
image4=image.resize((80, 60), PIL.Image.ANTIALIAS)
# get the data in memory.
newimage_file=StringIO()
image.save(newimage_file, JPEG)
newimage_file.seek(0)
newimage_file2=StringIO()
image2.save(newimage_file2, JPEG)
newimage_file2.seek(0)
newimage_file3=StringIO()
image3.save(newimage_file3, JPEG)
newimage_file3.seek(0)
newimage_file4=StringIO()
image4.save(newimage_file4, JPEG)
newimage_file4.seek(0)
# create an id for the image
now = datetime.datetime.now()
newimageid=now.strftime('%Y%m%d%H%M%S')
newimage_id=newimageid + '-640.jpg'
newimage_id2=newimageid + '-320.jpg'
newimage_id3=newimageid + '-160.jpg'
newimage_id4=newimageid + '-80.jpg'
# if there's an old image, delete it
if newimage_id in self.objectIds():
self.manage_delObjects([newimage_id])
if newimage_id2 in self.objectIds():
self.manage_delObjects([newimage_id2])
if newimage_id3 in self.objectIds():
self.manage_delObjects([newimage_id3])
if newimage_id4 in self.objectIds():
self.manage_delObjects([newimage_id4])
# create the Zope image object for the new image
self.manage_addProduct['OFSP'].manage_addImage(newimage_id,
newimage_file, '')
self.manage_addProduct['OFSP'].manage_addImage(newimage_id2,
newimage_file2, '')
self.manage_addProduct['OFSP'].manage_addImage(newimage_id3,
newimage_file3, '')
self.manage_addProduct['OFSP'].manage_addImage(newimage_id4,
newimage_file4, '')
# now find the new zope object so we can modify
# its properties.
newimage_image=getattr(self, newimage_id)
newimage_image.manage_addProperty('keywords', '', 'string')
newimage_image.manage_addProperty('caption', '', 'string')
newimage_image.manage_addProperty('imageid', '', 'string')
newimage_image.manage_changeProperties(keywords=newkeywords,
caption=newcaption, imageid=newimageid)
newimage_image2=getattr(self, newimage_id2)
newimage_image2.manage_addProperty('imagefile2', '', 'string')
newimage_image3=getattr(self, newimage_id3)
newimage_image3.manage_addProperty('imagefile3', '', 'string')
newimage_image4=getattr(self, newimage_id4)
newimage_image4.manage_addProperty('imagefile4', '', 'string')
--
On Feb 22, 2007, at 4:11 PM, Andrew Langmead wrote:
On Feb 22, 2007, at 1:29 PM, Tom Von Lahndorff wrote:
8original_image=getattr(self, original_id)
9original_file=StringIO(str(original_image.data))
[and later]
AttributeError: DSCF0004.jpg
I think your line numbers are off by one, because I'd think it is
the getattr that would be causing the Attribute Error (at most,
line 9 could give an attribute error for something called data.
Zope turns file upload objects into
ZPublisher.HTTPRequest.FileUpload instances. and pass them to your
method. FileUpload instances have an interface similar to python
file objects, you can .read(), .seek(), .close() or do whatever you
want to them and might not need to wrap the contents into a
StringIO object first. (your trying to fetch the file as an
attribute of self seems to imply that you think the form data is
already uploaded into zope and is an Image object in a folder. It
isn't there yet, and won't be unless you store it there.)
I think if you removed lines 8 and 9 (by your numbering) and
renamed the second argument to the method to original_file,
things would work as you need:
1 def makeImages(self, original_file):
2
3import PIL.Image
4import PIL
5import os.path
6
...
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** No cross posts or HTML encoding! **
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