如何检查文件是否是有效的图像文件？ [英] How to check if a file is a valid image file?

问题描述

我目前正在使用PIL。

I am currently using PIL.

from PIL import Image
try:
    im=Image.open(filename)
    # do stuff
except IOError:
    # filename not an image file

然而，尽管这足以涵盖大多数情况，但未检测到某些图像文件，如xcf，svg和psd。 Psd文件抛出OverflowError异常。

However, while this sufficiently covers most cases, some image files like, xcf, svg and psd are not being detected. Psd files throws an OverflowError exception.

有没有我可以包含它们？

Is there someway I could include them as well?

推荐答案

很多时候，前几对字符将是各种文件格式的幻数。除了上面的异常检查之外，您还可以检查这一点。

A lot of times the first couple chars will be a magic number for various file formats. You could check for this in addition to your exception checking above.

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