mirror of
https://github.com/python-telegram-bot/python-telegram-bot.git
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97 lines
3.7 KiB
Python
97 lines
3.7 KiB
Python
#!/usr/bin/env python
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# pylint: disable=unused-argument, wrong-import-position
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# This program is dedicated to the public domain under the CC0 license.
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"""This is a very simple example on how one could implement a custom error handler."""
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import html
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import json
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import logging
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import traceback
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from telegram import __version__ as TG_VER
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try:
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from telegram import __version_info__
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except ImportError:
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__version_info__ = (0, 0, 0, 0, 0) # type: ignore[assignment]
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if __version_info__ < (20, 0, 0, "alpha", 1):
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raise RuntimeError(
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f"This example is not compatible with your current PTB version {TG_VER}. To view the "
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f"{TG_VER} version of this example, "
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f"visit https://docs.python-telegram-bot.org/en/v{TG_VER}/examples.html"
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)
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from telegram import Update
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from telegram.constants import ParseMode
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from telegram.ext import Application, CommandHandler, ContextTypes
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# Enable logging
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logging.basicConfig(
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format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
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)
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logger = logging.getLogger(__name__)
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# This can be your own ID, or one for a developer group/channel.
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# You can use the /start command of this bot to see your chat id.
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DEVELOPER_CHAT_ID = 123456789
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async def error_handler(update: object, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Log the error and send a telegram message to notify the developer."""
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# Log the error before we do anything else, so we can see it even if something breaks.
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logger.error(msg="Exception while handling an update:", exc_info=context.error)
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# traceback.format_exception returns the usual python message about an exception, but as a
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# list of strings rather than a single string, so we have to join them together.
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tb_list = traceback.format_exception(None, context.error, context.error.__traceback__)
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tb_string = "".join(tb_list)
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# Build the message with some markup and additional information about what happened.
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# You might need to add some logic to deal with messages longer than the 4096 character limit.
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update_str = update.to_dict() if isinstance(update, Update) else str(update)
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message = (
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f"An exception was raised while handling an update\n"
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f"<pre>update = {html.escape(json.dumps(update_str, indent=2, ensure_ascii=False))}"
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"</pre>\n\n"
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f"<pre>context.chat_data = {html.escape(str(context.chat_data))}</pre>\n\n"
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f"<pre>context.user_data = {html.escape(str(context.user_data))}</pre>\n\n"
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f"<pre>{html.escape(tb_string)}</pre>"
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)
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# Finally, send the message
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await context.bot.send_message(
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chat_id=DEVELOPER_CHAT_ID, text=message, parse_mode=ParseMode.HTML
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)
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async def bad_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Raise an error to trigger the error handler."""
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await context.bot.wrong_method_name() # type: ignore[attr-defined]
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async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
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"""Displays info on how to trigger an error."""
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await update.effective_message.reply_html(
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"Use /bad_command to cause an error.\n"
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f"Your chat id is <code>{update.effective_chat.id}</code>."
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)
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def main() -> None:
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"""Run the bot."""
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# Create the Application and pass it your bot's token.
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application = Application.builder().token("TOKEN").build()
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# Register the commands...
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application.add_handler(CommandHandler("start", start))
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application.add_handler(CommandHandler("bad_command", bad_command))
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# ...and the error handler
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application.add_error_handler(error_handler)
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# Run the bot until the user presses Ctrl-C
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application.run_polling()
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if __name__ == "__main__":
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main()
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