# Check for valid image binary, possibly convert or resize, then save to cache filename
def store_image(imgdata, fn, resize=None):

    # Convert accepted formats -- even PNG for filtering now
    if re.match(br'^(.PNG|GIF\d+|.{0,15}(Exif|JFIF)|\x00\x00\x01\x00|.{0,255}<svg[^>]+svg)', imgdata):
    if re.match(br'^(.PNG|GIF\d+|.{0,15}(Exif|JFIF)|\x00\x00\x01\x00|\xFF\xD8\xFF|.{0,255}<svg[^>]+svg)', imgdata):
        try:
            # Read from byte/str
            image = Image.open(BytesIO(imgdata))
            log.FAVICON_IMAGE_TO_PNG(image, image.size, resize)

            # Resize
            if resize and image.size[0] > resize: