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Fix: Unnecessary truncation in markdown parser (#7972)

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### What problem does this PR solve?

Fix unnecessary truncation in markdown parser. So that markdown can work
perfectly like
[this](https://github.com/infiniflow/ragflow/issues/7824#issuecomment-2921312576)
in #7824, supporting multiple special delimiters.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
This commit is contained in:
Yongteng Lei 2025-05-30 15:04:21 +08:00 committed by GitHub
parent 31f4d44c73
commit bd4678bca6
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GPG Key ID: B5690EEEBB952194
2 changed files with 9 additions and 12 deletions
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17
rag/app/naive.py
View File

@ -32,7 +32,6 @@ from deepdoc.parser import DocxParser, ExcelParser, HtmlParser, JsonParser, Mark
from deepdoc.parser.figure_parser import VisionFigureParser, vision_figure_parser_figure_data_wraper
from deepdoc.parser.pdf_parser import PlainParser, VisionParser
from rag.nlp import concat_img, find_codec, naive_merge, naive_merge_with_images, naive_merge_docx, rag_tokenizer, tokenize_chunks, tokenize_chunks_with_images, tokenize_table
from rag.utils import num_tokens_from_string
class Docx(DocxParser):
@ -335,17 +334,13 @@ class Markdown(MarkdownParser):
sections = []
tbls = []
for sec in remainder.split("\n"):
if num_tokens_from_string(sec) > 3 * self.chunk_token_num:
sections.append((sec[:int(len(sec) / 2)], ""))
sections.append((sec[int(len(sec) / 2):], ""))
if sec.strip().find("#") == 0:
sections.append((sec, ""))
elif sections and sections[-1][0].strip().find("#") == 0:
sec_, _ = sections.pop(-1)
sections.append((sec_ + "\n" + sec, ""))
else:
if sec.strip().find("#") == 0:
sections.append((sec, ""))
elif sections and sections[-1][0].strip().find("#") == 0:
sec_, _ = sections.pop(-1)
sections.append((sec_ + "\n" + sec, ""))
else:
sections.append((sec, ""))
sections.append((sec, ""))
for table in tables:
tbls.append(((None, markdown(table, extensions=['markdown.extensions.tables'])), ""))
return sections, tbls

4
rag/nlp/__init__.py
View File

@ -545,7 +545,7 @@ def naive_merge(sections, chunk_token_num=128, delimiter="\n。；！？"):
add_chunk(sub_sec, pos)
return cks
def naive_merge_with_images(texts, images, chunk_token_num=128, delimiter="\n。；！？"):
if not texts or len(texts) != len(images):
@ -676,6 +676,8 @@ def get_delimiters(delimiters: str):
s = t
if s < len(delimiters):
dels.extend(list(delimiters[s:]))
dels.sort(key=lambda x: -len(x))
dels = [re.escape(d) for d in dels if d]
dels = [d for d in dels if d]
dels_pattern = "|".join(dels)