LightChimera's questions

C# 中有一个服务器从客户端读取消息，如下所示：

private string ReadMessageWithPrefixLength()
{
    var length = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(ReadBytes(sizeof(int)), 0));
    return Encoding.UTF8.GetString(ReadBytes(length));
}

private byte[] ReadBytes(int size)
{
    var buffer = new byte[size];
    int alreadyReadCount = 0;

    while (size - alreadyReadCount > 0)
    {
        var read = stream.Read(buffer, alreadyReadCount,   size - alreadyReadCount);
        if (read == 0)
            throw new EndOfStreamException();
        
        alreadyReadCount += read;
    }

    return buffer;
}

Python 中有一个客户端必须首先发送消息的长度，然后发送消息本身：

sendMessage = "message"
socket.send(len(sendMessage).to_bytes(2, "big"))
socket.send(sendMessage.encode())

每次我尝试读取服务器上的消息长度时，我都会得到一个负值（或相反太大）。我究竟做错了什么？

我正在编写一个测试机器人来处理 aiogram。启动机器人时，Timeout context manager should be used inside a task调用时立即出现错误dp.start_polling(bot)

程序代码main.py：

bot = Bot(config.BOT_KEY)
dp = Dispatcher(bot)
setup_handlers(dp)

async def main():
    await dp.start_polling(bot)

if __name__ == "__main__":
    try:
        asyncio.run(main())
    except Exception as ex:
        log.error(ex)

handlers.py:

def setup_handlers(dp: Dispatcher):
    dp.register_message_handler(_on_start, Command("start"))
    dp.register_message_handler(_get_info, Command("info"))


async def _on_start(message: types.Message): 
    await message.answer(messages.hello_message)


async def _get_info(message: types.Message):
    await message.answer(messages.info)

使用的版本：

Python     3.11.6
aiogram    2.9
aiohttp    3.9.1
aiosignal  1.3.1

错误堆栈

Traceback (most recent call last):
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/main.py", line 19, in <module>
    asyncio.run(main())
File "/data/data/com.termux/files/usr/lib/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^ 
File "/data/data/com.termux/files/usr/lib/python3.11/asyncio/runners.py", line 118, in run                                                                            return self._loop.run_until_complete(task)                                                                                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                        File "/data/data/com.termux/files/usr/lib/python3.11/asyncio/base_events.py", line 653, in run_until_complete                                                         return future.result()                                                                                                                                                     ^^^^^^^^^^^^^^^                                                                                                                                            File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/main.py", line 16, in main                                                                          await dp.start_polling(bot)                                                                                                                                       File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiogram/dispatcher/dispatcher.py", line 288, in start_polling     await self.reset_webhook(check=False)                                                                                                                             File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiogram/dispatcher/dispatcher.py", line 259, in reset_webhook     return await self.bot.delete_webhook()                                                                                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                            File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiogram/bot/bot.py", line 143, in delete_webhook                  result = await self.request(api.Methods.DELETE_WEBHOOK, payload)                                                                                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiogram/bot/base.py", line 201, in request
    return await api.make_request(self.session, self.__token, method, data, files,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiogram/bot/api.py", line 103, in make_request
    async with session.post(url, data=req, **kwargs) as response:
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiohttp/client.py", line 1187, in __aenter__
    self._resp = await self._coro
                 ^^^^^^^^^^^^^^^^
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiohttp/client.py", line 500, in _request
    with timer:
  File "/data/data/com.termux/files/home/code/PythonProjects/tg-bot/venv/lib/python3.11/site-packages/aiohttp/helpers.py", line 715, in __enter__
    raise RuntimeError(
RuntimeError: Timeout context manager should be used inside a task

从 API 中，我收到以下形式的 json 文件：

{
  "location": {
    "name": "name",
    "region": "region",
    "country": "Russia",
    "lat": xx.xx,
    "lon": yy.yy,
    "tz_id": "xx/yy",
    "localtime_epoch": 11111111,
    "localtime": "2023-08-18 23:38"
  },
  "current": {
    "last_updated_epoch": 1692390600,
    "last_updated": "2023-08-18 23:30",
    "temp_c": 21.0,
    "is_day": 0,
    "condition": {
      "text": "Ясно",
      "icon": "//cdn.weatherapi.com/weather/64x64/night/116.png",
      "code": 1003
    },
    "wind_kph": 15.1,
    "wind_degree": 20,
    "wind_dir": "NNE",
    "pressure_mb": 1025.0,
    "pressure_in": 30.27,
    "precip_mm": 0.8,
    "humidity": 78,
    "cloud": 50,
    "feelslike_c": 21.0,
    "vis_km": 10.0,
    "uv": 1.0,
    "gust_kph": 21.6
  }
}

我还有一个Weather包含以下字段的类：

    public string LastUpdate;
    public double TemperatureCelsius; // в json: current -> temp_c
    public double FeelsLikeCelsius;
    public string Discription; // в json: current -> condition -> text
    public double WindSpeed;
    public string WindDirection;
    public double Pressure;
    public double Precipitation;
    public int Humidity;
    public int Cloud;
    public int UvIndex;
    public bool IsDay;

所以这是JsonConvert.DeserializeObject<Weather>行不通的。当然，我可以反序列化为具有许多嵌套字典的字典，但这个选项的可读性不太好，因此令我反感。如何以更优雅的方式从文件附件（例如从current-> conditionget value text）获取数据，而不在类中创建我不需要的字段？

从geo API中，时区以以下格式提供给我регион/город，在用户信息中我想准确存储UTC偏移类型int，这该怎么办？

例子：

因为Europe/Moscow你需要获得价值3，因为Mexico/BajaNorte- 价值-8

我是 ASP.NET 的新手，刚刚开始了解依赖注入，所以很可能我的错误是显而易见的，但我仍然不明白到底出了什么问题。我的项目中有一个类StartCommand使用一些接口实现IUserService。当我尝试 get 时UserService，我收到一条错误消息，指出该服务未注册，尽管我似乎已注册它。

Program.cs:

builder.Services.AddDbContext<DataContext>(opt => opt.UseSqlite(connectionString), ServiceLifetime.Singleton);

builder.Services.AddTransient<IUserService, UserService>();
builder.Services.AddTransient<ICommand, StartCommand>();

StartCommand:

private readonly IUserService userService;

public StartCommand(IServiceProvider serviceProvider)
{
    userService = serviceProvider.GetRequiredService<UserService>(); <- Ошибка возникает тут
}
...

IUserService:

Task<AppUser?> GetUserAsync(Update update);
Task<bool> DeliteUserAsync(Update update);
Task<RegistratingStatus> RegistratingUserAsync(Update update);

UserService:

private readonly DataContext database;

public UserService(DataContext data)
{
    database = data;
}
...