#33240: get_image_dimensions: ValueError: buffer is not large enough
-------------------------------------+-------------------------------------
Reporter: NKSM | Owner: nobody
Type: Bug | Status: new
Component: File | Version: 2.2
uploads/storage |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by NKSM:
Old description:
> When I try to get the dimensions of the image like below:
> {{{
> def clean_image(self):
> image = self.cleaned_data.get("image")
> if not image:
> raise forms.ValidationError("No image!")
> else:
> w, h = get_image_dimensions(image)
> if w != 100:
> raise forms.ValidationError("The image is %i pixel wide. It's
> supposed to be 100px" % w)
> if h != 200:
> raise forms.ValidationError("The image is %i pixel high. It's
> supposed to be 200px" % h)
> return image
> }}}
>
> I get : `ValueError: buffer is not large enough`
>
> **Error at line**:
> https://github.com/django/django/blob/073b7b5915fdfb89a144e81173176ee13ff92a25/django/core/files/images.py#L62
>
> {{{
> # Most of the time Pillow only needs a small chunk to parse the image
> # and get the dimensions, but with some TIFF files Pillow needs to
> # parse the whole file.
> chunk_size = 1024
> while 1:
> data = file.read(chunk_size)
> if not data:
> break
> try:
> p.feed(data) ⬅️ **HERE**
> except zlib.error as e:
> }}}
>
> **Exception Location**: `/PIL/Image.py in frombuffer, line 2605`
>
> **This works well**:
>
> `width, height = PillowImage.open(image).size`
New description:
When I try to get the dimensions of the image like below:
{{{
def clean_image(self):
image = self.cleaned_data.get("image")
if not image:
raise forms.ValidationError("No image!")
else:
w, h = get_image_dimensions(image)
if w != 100:
raise forms.ValidationError("The image is %i pixel wide. It's
supposed to be 100px" % w)
if h != 200:
raise forms.ValidationError("The image is %i pixel high. It's
supposed to be 200px" % h)
return image
}}}
I get : `ValueError: buffer is not large enough`
**Error at line**:
https://github.com/django/django/blob/073b7b5915fdfb89a144e81173176ee13ff92a25/django/core/files/images.py#L62
{{{
# Most of the time Pillow only needs a small chunk to parse the image
# and get the dimensions, but with some TIFF files Pillow needs to
# parse the whole file.
chunk_size = 1024
while 1:
data = file.read(chunk_size)
if not data:
break
try:
p.feed(data) ⬅️ **HERE**
except zlib.error as e:
}}}
**Exception Location**: `/PIL/Image.py in frombuffer, line 2605`
**This works well**:
{{{
from PIL import Image as PillowImage
width, height = PillowImage.open(image).size
}}}
--
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Ticket URL: <https://code.djangoproject.com/ticket/33240#comment:1>
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