René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ota中有tar.gz压缩包升级方式，请问这个压缩包是如何制作的","articleBody":"```\nclass FileDecode(object):\n\n    def __init__(self, zip_file, parent_dir=\"/fota/usr/\"):\n        self.data = b''\n        self.fp = open(zip_file, \"rb\")\n        self.fileData = None\n        self.parent_dir = parent_dir\n        self.update_file_list = []\n\n    def get_update_files(self):\n        return self.update_file_list\n\n    def unzip(self):\n        \"\"\"缓存到内存中\"\"\"\n        self.fp.seek(10)\n        self.fileData = uzlib.DecompIO(self.fp, -15, 1)\n\n    @classmethod\n    def _ascii_trip(cls, data):\n        return data.decode('ascii').rstrip('\\0')\n\n    @classmethod\n    def file_size(cls, data):\n        \"\"\"获取真实size数据\"\"\"\n        size = cls._ascii_trip(data)\n        if not len(size):\n            return 0\n        return int(size, 8)\n\n    @classmethod\n    def get_file_name(cls, file_name):\n        \"\"\"获取文件名称\"\"\"\n        return cls._ascii_trip(file_name)\n\n    def get_data(self):\n        return self.fileData.read(0x200)\n\n    def unpack(self):\n        try:\n            folder_list = set()\n            self.data = self.get_data()\n            while True:\n                if not self.data:\n                    break\n                size = self.file_size(self.data[124:135])\n                file_name = self.get_file_name(self.data[:100])\n                full_file_name = self.parent_dir + file_name\n\n                if not size:\n                    if len(full_file_name):\n                        ql_fs.mkdirs(full_file_name)\n                        if full_file_name not in folder_list and full_file_name != self.parent_dir:\n                            folder_list.add(full_file_name)\n                    else:\n                        return\n                    self.data = self.get_data()\n                else:\n                    self.data = self.get_data()\n                    update_file = open(full_file_name, \"wb+\")\n                    total_size = size\n                    while True:\n                        size -= 0x200\n                        if size \u003c= 0:\n                            update_file.write(self.data[:size + 512])\n                            break\n                        else:\n                            update_file.write(self.data)\n                        self.data = self.get_data()\n                    self.data = self.get_data()\n                    update_file.close()\n                    self.update_file_list.append({\"file_name\": file_name, \"size\": total_size})\n        except Exception as e:\n            self.fp.close()\n            return False\n        else:\n            self.fp.close()\n            return True\n\n\nclass AppFota(object):\n\n    def __init__(self):\n        self.fota = BaseAppFota.new()\n\n    def set_update_flag(self):\n        \"\"\"设置升级标志（当且仅当升级文件下载成功后，且设置了升级标志，重启后才会触发升级，否则不升级。）\"\"\"\n        self.fota.set_update_flag()\n\n    def download(self, url, file_name):\n        \"\"\"下载单一升级文件\n\n        @url: 待下载文件的url，类型为str。\n        @file_name: 本地待升级文件的绝对路径，类型str。\n        \"\"\"\n        if self.fota.download(url, file_name) == 0:\n            return True\n        return False\n\n    def bulk_download(self, info):\n        \"\"\"批量下载升级文件\n\n        @info: 批量下载列表，列表的元素均为包含了url和file_name的字典，类型为list\n        \"\"\"\n        return self.fota.bulk_download(info)\n\n    @staticmethod\n    def __download_file_from_server(url, path):\n        response = request.get(url)\n        if response.status_code not in (200, 206):\n            return False\n        with open(path, 'wb') as f:\n            for c in response.content:\n                f.write(c)\n\n    @staticmethod\n    def __decode_file_to_updater_dir(path, updater_dir):\n        fd = FileDecode(path, parent_dir=updater_dir)\n        ql_fs.mkdirs(updater_dir)\n        fd.unzip()\n        if fd.unpack():\n            for file in fd.update_file_list:\n                update_download_stat('', '/usr/' + file['file_name'], file['size'])\n            return True\n        else:\n            return False\n\n    def download_tar(self, url, path=\"/usr/temp.tar.gz\"):\n        \"\"\"通过压缩文件下载升级。\"\"\"\n        self.__download_file_from_server(url, path)\n        if self.__decode_file_to_updater_dir(\n            path,\n            self.fota.app_fota_pkg_mount.fota_dir + '/usr/.updater/usr/'\n        ):\n            uos.remove(path)\n            return True\n        else:\n            return False\n```\n\n这个解压缩函数，对应的压缩包是如何制作的","author":{"url":"https://github.com/Connor-WangK","@type":"Person","name":"Connor-WangK"},"datePublished":"2025-04-09T03:28:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2/QFrame/issues/2"}