Toggle table of contents sidebar
errorhandlerbot.pyΒΆ
1#!/usr/bin/env python
2# pylint: disable=unused-argument
3# This program is dedicated to the public domain under the CC0 license.
4
5"""This is a very simple example on how one could implement a custom error handler."""
6import html
7import json
8import logging
9import traceback
10
11from telegram import Update
12from telegram.constants import ParseMode
13from telegram.ext import Application, CommandHandler, ContextTypes
14
15# Enable logging
16logging.basicConfig(
17 format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
18)
19# set higher logging level for httpx to avoid all GET and POST requests being logged
20logging.getLogger("httpx").setLevel(logging.WARNING)
21
22logger = logging.getLogger(__name__)
23
24# This can be your own ID, or one for a developer group/channel.
25# You can use the /start command of this bot to see your chat id.
26DEVELOPER_CHAT_ID = 123456789
27
28
29async def error_handler(update: object, context: ContextTypes.DEFAULT_TYPE) -> None:
30 """Log the error and send a telegram message to notify the developer."""
31 # Log the error before we do anything else, so we can see it even if something breaks.
32 logger.error("Exception while handling an update:", exc_info=context.error)
33
34 # traceback.format_exception returns the usual python message about an exception, but as a
35 # list of strings rather than a single string, so we have to join them together.
36 tb_list = traceback.format_exception(None, context.error, context.error.__traceback__)
37 tb_string = "".join(tb_list)
38
39 # Build the message with some markup and additional information about what happened.
40 # You might need to add some logic to deal with messages longer than the 4096 character limit.
41 update_str = update.to_dict() if isinstance(update, Update) else str(update)
42 message = (
43 "An exception was raised while handling an update\n"
44 f"<pre>update = {html.escape(json.dumps(update_str, indent=2, ensure_ascii=False))}"
45 "</pre>\n\n"
46 f"<pre>context.chat_data = {html.escape(str(context.chat_data))}</pre>\n\n"
47 f"<pre>context.user_data = {html.escape(str(context.user_data))}</pre>\n\n"
48 f"<pre>{html.escape(tb_string)}</pre>"
49 )
50
51 # Finally, send the message
52 await context.bot.send_message(
53 chat_id=DEVELOPER_CHAT_ID, text=message, parse_mode=ParseMode.HTML
54 )
55
56
57async def bad_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
58 """Raise an error to trigger the error handler."""
59 await context.bot.wrong_method_name() # type: ignore[attr-defined]
60
61
62async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
63 """Displays info on how to trigger an error."""
64 await update.effective_message.reply_html(
65 "Use /bad_command to cause an error.\n"
66 f"Your chat id is <code>{update.effective_chat.id}</code>."
67 )
68
69
70def main() -> None:
71 """Run the bot."""
72 # Create the Application and pass it your bot's token.
73 application = Application.builder().token("TOKEN").build()
74
75 # Register the commands...
76 application.add_handler(CommandHandler("start", start))
77 application.add_handler(CommandHandler("bad_command", bad_command))
78
79 # ...and the error handler
80 application.add_error_handler(error_handler)
81
82 # Run the bot until the user presses Ctrl-C
83 application.run_polling(allowed_updates=Update.ALL_TYPES)
84
85
86if __name__ == "__main__":
87 main()
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4