PIL.UnidentifiedImageError on png file

[MayankFawkes]

What did you do?

Trying to open one png file

What did you expect to happen?

open and skip all the file checks

What actually happened?

returning error

What are your OS, Python and Pillow versions?

• OS: WIN 11
• Python: 3.10.11
• Pillow: 10.0.1/10.1.0

from PIL import Image
import requests
from io import BytesIO

IMG_URL = "https://i.ibb.co/QN1JyLp/IMG-20231030-100421.png"

response = requests.get(IMG_URL)
image_object = BytesIO(response.content)

img = Image.open(image_object)
# do things here
img.show()

i tried some third party tools to check the PNG file. https://processing.compress-or-die.com/repair-process

1	Combined all IDAT chunks.
2	Fixed CRC checksum for chunk "eXIf".
3	Fixed CRC checksum for chunk "IDAT".

is there a way i can skip those checks in pillow, and just open it in insecure way of something.

[radarhere]

You can set LOAD_TRUNCATED_IMAGES.

from PIL import ImageFile
ImageFile.LOAD_TRUNCATED_IMAGES = True

[MayankFawkes]

alright that's working, also @radarhere it would be great if you could explain a little about LOAD_TRUNCATED_IMAGES constant.

[radarhere]

https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html#png

By default Pillow doesn’t allow loading of truncated PNG files, set ImageFile.LOAD_TRUNCATED_IMAGES to override this.

https://pillow.readthedocs.io/en/stable/reference/ImageFile.html#PIL.ImageFile.LOAD_TRUNCATED_IMAGES

PIL.ImageFile.LOAD_TRUNCATED_IMAGES = False
Whether or not to load truncated image files. User code may change this.

As of #1991, the setting allows PNGs to skip bad PNG checksums.

[MayankFawkes]

Alright thanks