Python PIL “IOError: image file truncated” with big images

Question

I think this problem is not Zope-related. Nonetheless I\'ll explain what I\'m trying to do:

I\'m using a PUT_factory in Zope to upload images to the ZODB per FTP. Th

Answer 1

I'm a little late to reply here, but I ran into a similar problem and I wanted to share my solution. First, here's a pretty typical stack trace for this problem:

Traceback (most recent call last):
  ...
  File ..., line 2064, in ...
    im.thumbnail(DEFAULT_THUMBNAIL_SIZE, Image.ANTIALIAS)
  File "/Library/Python/2.7/site-packages/PIL/Image.py", line 1572, in thumbnail
    self.load()
  File "/Library/Python/2.7/site-packages/PIL/ImageFile.py", line 220, in load
    raise IOError("image file is truncated (%d bytes not processed)" % len(b))
IOError: image file is truncated (57 bytes not processed)

If we look around line 220 (in your case line 201—perhaps you are running a slightly different version), we see that PIL is reading in blocks of the file and that it expects that the blocks are going to be of a certain size. It turns out that you can ask PIL to be tolerant of files that are truncated (missing some file from the block) by changing a setting.

Somewhere before your code block, simply add the following:

from PIL import ImageFile
ImageFile.LOAD_TRUNCATED_IMAGES = True

...and you should be good.

EDIT: It looks like this helps for the version of PIL bundled with Pillow ("pip install pillow"), but may not work for default installations of PIL

Answer 2

Best thing is that you can:

if img and img.meta_type == 'Image':
    pilImg = PIL.Image.open( StringIO(str(img.data)) )
elif imgData:
    pilImg = PIL.Image.open( StringIO(imgData) )

try:
    pilImg.load()
except IOError:
    pass # You can always log it to logger

pilImg.thumbnail((width, height), PIL.Image.ANTIALIAS)

As dumb as it seems - it will work like a miracle. If your image has missing data, it will be filled with gray (check the bottom of your image).

Note: usage of camel case in Python is discouraged and is used only in class names.

Answer 3

I had to change the tds version to 7.2 to prevent this from happening. Also works with tds version 8.0, however I had some other issues with 8.0.

Answer 4

This might not be a PIL issue. It might be related to your HTTP Server setting. HTTP servers put a limit on the size of the entity body that will be accepted.

For eg, in Apache FCGI, the option FcgidMaxRequestLen determines the maximum size of file that can be uploaded.

Check that for your server - it might be the one that is limiting the upload size.

Answer 5

Here is what I did:

• Edit LOAD_TRUNCATED_IMAGES = False line from /usr/lib/python3/dist-packages/PIL/ImageFile.py:40 to LOAD_TRUNCATED_IMAGES = True.

Editing the file requires root access though. I encountered this error while running some pytorch which was maybe using the PIL library.

Do this fix only if you encounter this error, without directly using PIL.

Else please do

from PIL import ImageFile
ImageFile.LOAD_TRUNCATED_IMAGES = True