Веб Приложение (WebApp)¶

Telegram Bot API 6.0 произвел революцию в разработке чат-ботов, используя особенности Веб Приложений.

Вы можете прочитать больше о это в официальном блоге и документации.

litegram реализует простые утилиты для устранения головной боли, предоставляя готовые инструменты проверки данных из Веб Застосунку Telegram на серверной стороне.

Использование¶

Например, из фронтенда вы передадите application/x-www-form-urlencoded в POST запросе из полем _auth в теле и хотите вернуть информацию о пользователя в ответ как application/json

from litegram.utils.web_app import safe_parse_webapp_init_data
from httpx.web_request import Request
from httpx.web_response import json_response

async def check_data_handler(request: Request):
    bot: Bot = request.app["bot"]

    data = await request.post()  # application/x-www-form-urlencoded
    try:
        data = safe_parse_webapp_init_data(token=bot.token, init_data=data["_auth"])
    except ValueError:
        return json_response({"ok": False, "err": "Unauthorized"}, status=401)
    return json_response({"ok": True, "data": data.user.dict()})

Функции¶

litegram.utils.web_app.check_webapp_signature(token: str, init_data: str) → bool[исходный код]¶

Check incoming WebApp init data signature

Source: https://core.telegram.org/bots/webapps#validating-data-received-via-the-web-app

Параметры:

token – bot Token
init_data – data from frontend to be validated

Результат:

litegram.utils.web_app.parse_webapp_init_data(init_data: str, *, loads: Callable[..., Any]=<function loads>) → WebAppInitData[исходный код]¶

Parse WebApp init data and return it as WebAppInitData object

This method doesn’t make any security check, so you shall not trust to this data, use safe_parse_webapp_init_data instead.

Параметры:

init_data – data from frontend to be parsed
loads

Результат:

litegram.utils.web_app.safe_parse_webapp_init_data(token: str, init_data: str, *, loads: Callable[..., Any]=<function loads>) → WebAppInitData[исходный код]¶

Validate raw WebApp init data and return it as WebAppInitData object

Raise ValueError when data is invalid

Параметры:

token – bot token
init_data – data from frontend to be parsed and validated
loads

Результат:

Типы¶

This object contains data that is transferred to the Web App when it is opened. It is empty if the Web App was launched from a keyboard button.

Source: https://core.telegram.org/bots/webapps#webappinitdata

query_id: str | None¶: A unique identifier for the Web App session, required for sending messages via the answerWebAppQuery method.

user: WebAppUser | None¶: An object containing data about the current user.

receiver: WebAppUser | None¶: An object containing data about the chat partner of the current user in the chat where the bot was launched via the attachment menu. Returned only for Web Apps launched via the attachment menu.

chat: WebAppChat | None¶: An object containing data about the chat where the bot was launched via the attachment menu. Returned for supergroups, channels, and group chats – only for Web Apps launched via the attachment menu.

chat_type: str | None¶: Type of the chat from which the Web App was opened. Can be either “sender” for a private chat with the user opening the link, “private”, “group”, “supergroup”, or “channel”. Returned only for Web Apps launched from direct links.

chat_instance: str | None¶: Global identifier, uniquely corresponding to the chat from which the Web App was opened. Returned only for Web Apps launched from a direct link.

start_param: str | None¶: The value of the startattach parameter, passed via link. Only returned for Web Apps when launched from the attachment menu via link. The value of the start_param parameter will also be passed in the GET-parameter tgWebAppStartParam, so the Web App can load the correct interface right away.

can_send_after: int | None¶: Time in seconds, after which a message can be sent via the answerWebAppQuery method.

auth_date: datetime.datetime¶: Unix time when the form was opened.

hash: str¶: A hash of all passed parameters, which the bot server can use to check their validity.

class litegram.utils.web_app.WebAppUser(**extra_data: Any)[исходный код]¶

This object contains the data of the Web App user.

Source: https://core.telegram.org/bots/webapps#webappuser

id: int¶: A unique identifier for the user or bot. This number may have more than 32 significant bits and some programming languages may have difficulty/silent defects in interpreting it. It has at most 52 significant bits, so a 64-bit integer or a double-precision float type is safe for storing this identifier.

is_bot: bool | None¶: True, if this user is a bot. Returns in the receiver field only.

first_name: str¶: First name of the user or bot.

last_name: str | None¶: Last name of the user or bot.

username: str | None¶: Username of the user or bot.

language_code: str | None¶: IETF language tag of the user’s language. Returns in user field only.

is_premium: bool | None¶: True, if this user is a Telegram Premium user.

added_to_attachment_menu: bool | None¶: True, if this user added the bot to the attachment menu.

allows_write_to_pm: bool | None¶: True, if this user allowed the bot to message them.

photo_url: str | None¶: URL of the user’s profile photo. The photo can be in .jpeg or .svg formats. Only returned for Web Apps launched from the attachment menu.

class litegram.utils.web_app.WebAppChat(**extra_data: Any)[исходный код]¶

This object represents a chat.

Source: https://core.telegram.org/bots/webapps#webappchat

id: int¶: Unique identifier for this chat. This number may have more than 32 significant bits and some programming languages may have difficulty/silent defects in interpreting it. But it has at most 52 significant bits, so a signed 64-bit integer or double-precision float type are safe for storing this identifier.

type: str¶: Type of chat, can be either “group”, “supergroup” or “channel”

title: str¶: Title of the chat

username: str | None¶: Username of the chat

photo_url: str | None¶: URL of the chat’s photo. The photo can be in .jpeg or .svg formats. Only returned for Web Apps launched from the attachment menu.