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fix(telegram): retry on transient TLS failures during connect and send (#1535)

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fix(telegram): retry on transient TLS failures during connect and send
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Teknium 2026-03-16 05:28:11 -07:00 • committed by GitHub
commit b411b979cb
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1 changed files with 60 additions and 27 deletions
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87
gateway/platforms/telegram.py
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@ -202,8 +202,26 @@ class TelegramAdapter(BasePlatformAdapter):
self._handle_media_message
))
# Start polling in background
await self._app.initialize()
# Start polling — retry initialize() for transient TLS resets
try:
from telegram.error import NetworkError, TimedOut
except ImportError:
NetworkError = TimedOut = OSError # type: ignore[misc,assignment]
_max_connect = 3
for _attempt in range(_max_connect):
try:
await self._app.initialize()
break
except (NetworkError, TimedOut, OSError) as init_err:
if _attempt < _max_connect - 1:
wait = 2 ** _attempt
logger.warning(
"[%s] Connect attempt %d/%d failed: %s — retrying in %ds",
self.name, _attempt + 1, _max_connect, init_err, wait,
)
await asyncio.sleep(wait)
else:
raise
await self._app.start()
loop = asyncio.get_running_loop()
@ -336,32 +354,47 @@ class TelegramAdapter(BasePlatformAdapter):
message_ids = []
thread_id = metadata.get("thread_id") if metadata else None
try:
from telegram.error import NetworkError as _NetErr
except ImportError:
_NetErr = OSError # type: ignore[misc,assignment]
for i, chunk in enumerate(chunks):
# Try Markdown first, fall back to plain text if it fails
try:
msg = await self._bot.send_message(
chat_id=int(chat_id),
text=chunk,
parse_mode=ParseMode.MARKDOWN_V2,
reply_to_message_id=int(reply_to) if reply_to and i == 0 else None,
message_thread_id=int(thread_id) if thread_id else None,
)
except Exception as md_error:
# Markdown parsing failed, try plain text
if "parse" in str(md_error).lower() or "markdown" in str(md_error).lower():
logger.warning("[%s] MarkdownV2 parse failed, falling back to plain text: %s", self.name, md_error)
# Strip MDV2 escape backslashes so the user doesn't
# see raw backslashes littered through the message.
plain_chunk = _strip_mdv2(chunk)
msg = await self._bot.send_message(
chat_id=int(chat_id),
text=plain_chunk,
parse_mode=None, # Plain text
reply_to_message_id=int(reply_to) if reply_to and i == 0 else None,
message_thread_id=int(thread_id) if thread_id else None,
)
else:
raise # Re-raise if not a parse error
msg = None
for _send_attempt in range(3):
try:
# Try Markdown first, fall back to plain text if it fails
try:
msg = await self._bot.send_message(
chat_id=int(chat_id),
text=chunk,
parse_mode=ParseMode.MARKDOWN_V2,
reply_to_message_id=int(reply_to) if reply_to and i == 0 else None,
message_thread_id=int(thread_id) if thread_id else None,
)
except Exception as md_error:
# Markdown parsing failed, try plain text
if "parse" in str(md_error).lower() or "markdown" in str(md_error).lower():
logger.warning("[%s] MarkdownV2 parse failed, falling back to plain text: %s", self.name, md_error)
plain_chunk = _strip_mdv2(chunk)
msg = await self._bot.send_message(
chat_id=int(chat_id),
text=plain_chunk,
parse_mode=None,
reply_to_message_id=int(reply_to) if reply_to and i == 0 else None,
message_thread_id=int(thread_id) if thread_id else None,
)
else:
raise
break # success
except _NetErr as send_err:
if _send_attempt < 2:
wait = 2 ** _send_attempt
logger.warning("[%s] Network error on send (attempt %d/3), retrying in %ds: %s",
self.name, _send_attempt + 1, wait, send_err)
await asyncio.sleep(wait)
else:
raise
message_ids.append(str(msg.message_id))
return SendResult(