From 67f4c0fb6267b648b4cbb24b9f7d6c63da63dde0 Mon Sep 17 00:00:00 2001
From: Yufeng He <40085740+universeplayer@users.noreply.github.com>
Date: Mon, 6 Apr 2026 20:48:24 +0800
Subject: [PATCH] fix(telegram): skip empty text in sendMessageDraft to prevent
 400 spam

When streaming is enabled, markdownify() can produce empty strings for
certain inputs (whitespace-only, formatting-only markdown). The draft
sender loop then calls sendMessageDraft with empty text, which Telegram
rejects with 'Text must be non-empty', flooding the log every 0.5s.

Add an early return in _send_message_draft() when text is empty or
whitespace-only. This matches WebChat's approach of skipping empty
responses.

Fixes #7353
---
 astrbot/core/platform/sources/telegram/tg_event.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/astrbot/core/platform/sources/telegram/tg_event.py b/astrbot/core/platform/sources/telegram/tg_event.py
index f963969b7c..8d86570739 100644
--- a/astrbot/core/platform/sources/telegram/tg_event.py
+++ b/astrbot/core/platform/sources/telegram/tg_event.py
@@ -389,6 +389,9 @@ async def _send_message_draft(
             message_thread_id: 可选，目标消息线程 ID
             parse_mode: 可选，消息文本的解析模式
         """
+        if not text or not text.strip():
+            return
+
         kwargs: dict[str, Any] = {}
         if message_thread_id:
             kwargs["message_thread_id"] = int(message_thread_id)