fix/708: fixes issue with processing .png images with large file sizes.

[Sidsector9]

Description of the Change

This PR:

• sets the image scanning timeout to 60 seconds.
• adds the filter hook 'classifai_ms_computer_vision_scan_image_timeout'

Closes #708

How to test the Change

This can be tested with the following sample images:

5mb-png-image
10mb-png-image

Changelog Entry

Added - filter hook 'classifai_ms_computer_vision_scan_image_timeout' to increase image processing timeout.
Fixed - timeout issue with processing .png images of large file sizes.

Credits

Props @QAharshalkadu @Sidsector9

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[dkotter]

One minor change request on the documentation side.

But also a question that may need looked at further. According to the API docs, the max image supported is 4MB. We have some code in place to return an error if the image size is larger than that so in theory, a 5MB image shouldn't even work, though it sounds like that's not the case.

Some time should be spent here to figure out how images larger than 4MB are making it through and making any needed adjustments. I know we check the file size in the rest_endpoint_callback method but maybe that check needs added other places as well?

[Sidsector9]

According to the API docs, the max image supported is 4MB. We have some code in place to return an error if the image size is larger than that so in theory, a 5MB image shouldn't even work, though it sounds like that's not the case.

@dkotter what you're saying is correct and the check we have is working as expected. When we upload an image size > 4MB, the check selects the largest image variant that is < 4MB to process.

This particular issue is a weird one pertaining to just the .png format. From what I am understanding, the AI service takes more time to process a .png compared to a .jpeg. So, even with a .png file which has a size of 3.5MB, it still fails.

This works well when the timeout is increased.