实现了判断文件是否有效的功能 · Pull Request !1 · Invalid pointer/TechMouse Music Fetcher

### 相关的Issue

```
def music_check(url):
    temp_dir = 'temp'
    temp_file_path = os.path.join(temp_dir, 'temp.mp3')

# 确保临时目录存在
    if not os.path.exists(temp_dir):
        os.makedirs(temp_dir)

try:
        # 下载音乐文件
        response = requests.get(url)
        response.raise_for_status()  # 这将抛出异常如果status_code不是200

# 保存到临时文件
        with open(temp_file_path, 'wb') as f:
            f.write(response.content)

# 检查音频文件
        audio = MP3(temp_file_path)
        duration = audio.info.length

if duration > 0:
            print("The music file is valid.")
            return True
        else:
            print("The music file is invalid (duration <= 0).")
            return False

except requests.RequestException as e:
        print(f"Network error occurred: {e}")
    except Exception as e:
        print(f"An error occurred: {e}")
    finally:
        # 清理：无论成功还是失败，尝试删除临时文件
        with suppress(Exception):  # 使用suppress忽略删除文件时可能产生的异常
            os.remove(temp_file_path)

return False  # 如果发生错误，返回False

```

类型	指派人员	状态
审查		进行中 (0/1)
测试		进行中 (0/1)

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