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fix: strip embedded markup before text conversion #6751

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fix: strip embedded markup before text conversion #6751

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16 changes: 16 additions & 0 deletions apps/common/tests.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
from django.test import SimpleTestCase

from common.utils.common import markdown_to_plain_text


class MarkdownToPlainTextTestCase(SimpleTestCase):
def test_removes_embedded_markup_contents(self):
cases = {
'before <audio src="clip.mp3">audio fallback</audio> after': "before after",
'before <video src="clip.mp4">video fallback</video> after': "before after",
'before <form_rander>{"label":"private"}</form_rander> after': "before after",
}

for markup, expected in cases.items():
with self.subTest(markup=markup):
self.assertEqual(markdown_to_plain_text(markup), expected)
19 changes: 11 additions & 8 deletions apps/common/utils/common.py
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Expand Up @@ -159,8 +159,18 @@ def _remove_empty_lines(text):


def markdown_to_plain_text(md: str) -> str:
# 先移除特定媒体标签（优先级高于通用 Markdown 和 HTML 处理）
text = re.sub(
r"<(audio|video)(?:\s+[^>]*)?>.*?</\1>",
"",
md,
flags=re.DOTALL | re.IGNORECASE,
)
text = re.sub(r"<img[^>]*>", "", text) # 匹配图片标签
# 去除表单渲染
text = re.sub(r"<form_rander>.*?<\/form_rander>", "", text, flags=re.DOTALL)
# 移除图片 ![alt](url)
text = re.sub(r"!\[.*?\]\(.*?\)", "", md)
text = re.sub(r"!\[.*?\]\(.*?\)", "", text)
# 移除链接 [text](url)
text = re.sub(r"\[([^\]]+)\]\([^)]+\)", r"\1", text)
# 移除 Markdown 标题符号 (#, ##, ###)
Expand All @@ -179,15 +189,8 @@ def markdown_to_plain_text(md: str) -> str:
text = re.sub(r"\n{2,}", "\n", text)
# 使用正则表达式去除所有 HTML 标签
text = re.sub(r"<[^>]+>", "", text)
# 先移除特定媒体标签（优先级高于通用HTML标签移除）
text = re.sub(
r"<(?:audio|video)(?:\s+[^>]*)?>.*?(?:</(?:audio|video)>)?", "", text, flags=re.DOTALL | re.IGNORECASE
)
text = re.sub(r"<img[^>]*>", "", text) # 匹配图片标签
# 去除多余的空白字符（包括换行符、制表符等）
text = re.sub(r"\s+", " ", text)
# 去除表单渲染
text = re.sub(r"<form_rander>.*?<\/form_rander>", "", text, flags=re.DOTALL)
# 去除首尾空格
text = text.strip()
return text
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