Merge pull request #100 from deepghs/fix/nai

            raise ValueError(f'Image magic number mismatch, '

                             f'{self._magic_bytes!r} expected but {read_magic!r}.')

        read_len = reader.read_32bit_integer() // 8

        next_int = reader.read_32bit_integer()

        if next_int is None:

            raise ValueError('No next int32 to read.')

        read_len = next_int // 8

        json_data = reader.get_next_n_bytes(read_len)

        json_data = json.loads(gzip.decompress(json_data).decode("utf-8"))

import json

import os

import warnings

import zlib

from dataclasses import dataclass

from typing import Optional, Union

    image = load_image(image, force_background=None, mode=None)

    try:

        return ImageLsbDataExtractor().extract_data(image)

    except (ValueError, json.JSONDecodeError):

    except (ValueError, json.JSONDecodeError, zlib.error, OSError, UnicodeDecodeError):

        # ValueError: binary data with wrong format

        # json.JSONDecodeError: zot a json-formatted data

        # zlib.error, OSError: not zlib compressed binary data

        # UnicodeDecodeError: cannot decode as utf-8 text

        return image.info or {}

                    save_pnginfo=False, add_lsb_meta=False,

                )

            assert get_naimeta_from_image('image.png') is None

    @pytest.mark.parametrize(['file'], [

        ('118519492_p0.png',),

        ('118438300_p1.png',),

    ])

    def test_image_error_with_wrong_format(self, file):

        assert get_naimeta_from_image(get_testfile(file)) is None