image_tools.py 文件源码

def _save_thumbnails(image, path, size, suffix):
    nm = NamedTemporaryFile(suffix='.%s' % settings.IMG_FILE_TYPE)
    default_storage = get_storage_class()()
    try:
        # Ensure conversion to float in operations
        image.thumbnail(
            get_dimensions(image.size, float(size)), Image.ANTIALIAS)
    except ZeroDivisionError:
        pass
    try:
        image.save(nm.name)
    except IOError:
        # e.g. `IOError: cannot write mode P as JPEG`, which gets raised when
        # someone uploads an image in an indexed-color format like GIF
        image.convert('RGB').save(nm.name)
    default_storage.save(
        get_path(path, suffix), ContentFile(nm.read()))
    nm.close()