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Fix: handle html tags in empty_response (#17657)

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Lynn
2026-08-03 11:14:18 +08:00
committed by GitHub
parent 288be805f1
commit 2e0dda59fc
2 changed files with 19 additions and 2 deletions
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2
agent/canvas.py
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@@ -835,6 +835,8 @@ class Canvas(Graph):
)
text = emoji_pattern.sub("", text)
text = re.sub(r"<[^>]*>", "", text)
text = re.sub(r"\s+", " ", text).strip()
MAX_LEN = 500

19
api/db/services/dialog_service.py
View File

@@ -14,6 +14,7 @@
# limitations under the License.
#
import asyncio
import html
import logging
import re
import time
@@ -807,8 +808,15 @@ async def async_chat(dialog, messages, stream=True, **kwargs):
retrieval_ts = timer()
if not knowledges and prompt_config.get("empty_response"):
empty_res = prompt_config["empty_response"]
yield {"answer": empty_res, "reference": {}, "prompt": "", "audio_binary": None, "final": False}
yield {"answer": empty_res, "reference": kbinfos, "prompt": "\n\n### Query:\n%s" % " ".join(questions), "audio_binary": tts(tts_mdl, empty_res), "final": True}
logging.debug("async_chat empty_response path: empty_res=%r tts_mdl=%r", empty_res, tts_mdl)
# HTML-escape for frontend display so DOMPurify does not strip
# unknown tags (e.g. <abc> → &lt;abc&gt;), which would otherwise
# leave the content blank and stall the UI on "Searching…".
# The raw value is still used for TTS (which has its own tag-
# stripping in clean_tts_text).
escaped_answer = html.escape(empty_res)
yield {"answer": escaped_answer, "reference": {}, "prompt": "", "audio_binary": None, "final": False}
yield {"answer": escaped_answer, "reference": kbinfos, "prompt": "\n\n### Query:\n%s" % " ".join(questions), "audio_binary": tts(tts_mdl, empty_res), "final": True}
return
# Only overwrite kwargs["knowledge"] when retrieval produced something;
@@ -1481,6 +1489,8 @@ def clean_tts_text(text: str) -> str:
if not text:
return ""
logging.debug("clean_tts_text BEFORE: %r", text)
text = text.encode("utf-8", "ignore").decode("utf-8", "ignore")
text = re.sub(r"[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F]", "", text)
@@ -1490,12 +1500,17 @@ def clean_tts_text(text: str) -> str:
)
text = emoji_pattern.sub("", text)
# Strip XML/SSML/HTML-like tags so the TTS engine does not hang on
# unclosed or unknown markup (e.g. <abc> in empty_response).
text = re.sub(r"<[^>]*>", "", text)
text = re.sub(r"\s+", " ", text).strip()
MAX_LEN = 500
if len(text) > MAX_LEN:
text = text[:MAX_LEN]
logging.debug("clean_tts_text AFTER: %r", text)
return text