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fix: handle Telegram message length limit with smart splitting

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This commit is contained in:
Re-bin
2026-02-16 12:39:39 +00:00
parent 48a14edbda
commit db0e8aa61b
4 changed files with 18 additions and 430 deletions
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28
nanobot/channels/telegram.py
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@@ -82,17 +82,20 @@ def _split_message(content: str, max_len: int = 4000) -> list[str]:
"""Split content into chunks within max_len, preferring line breaks."""
if len(content) <= max_len:
return [content]
chunks = []
while len(content) > max_len:
chunk = content[:max_len]
break_pos = chunk.rfind('\n')
if break_pos == -1:
break_pos = chunk.rfind(' ')
if break_pos == -1:
break_pos = max_len
chunks.append(chunk[:break_pos])
content = content[break_pos:].lstrip()
return chunks + [content]
chunks: list[str] = []
while content:
if len(content) <= max_len:
chunks.append(content)
break
cut = content[:max_len]
pos = cut.rfind('\n')
if pos == -1:
pos = cut.rfind(' ')
if pos == -1:
pos = max_len
chunks.append(content[:pos])
content = content[pos:].lstrip()
return chunks
class TelegramChannel(BaseChannel):
@@ -211,7 +214,8 @@ class TelegramChannel(BaseChannel):
for chunk in _split_message(msg.content):
try:
await self._app.bot.send_message(chat_id=chat_id, text=_markdown_to_telegram_html(chunk), parse_mode="HTML")
html = _markdown_to_telegram_html(chunk)
await self._app.bot.send_message(chat_id=chat_id, text=html, parse_mode="HTML")
except Exception as e:
logger.warning(f"HTML parse failed, falling back to plain text: {e}")
try: