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https://github.com/infiniflow/ragflow.git
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69264b3a70
### What problem does this PR solve? ### Type of change - [x] New Feature (non-breaking change which adds functionality) - [x] Refactoring --------- Co-authored-by: Zhichang Yu <yuzhichang@gmail.com> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
#
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# Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from io import BytesIO
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from pypdf import PdfReader as pdf2_read
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from rag.nlp import find_codec
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def get_text(fnm: str, binary=None) -> str:
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txt = ""
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if binary is not None:
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encoding = find_codec(binary)
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txt = binary.decode(encoding, errors="ignore")
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else:
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with open(fnm, "r") as f:
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while True:
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line = f.readline()
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if not line:
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break
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txt += line
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return txt
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def extract_pdf_outlines(source):
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try:
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with pdf2_read(source if isinstance(source, str) else BytesIO(source)) as pdf:
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outlines = []
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def dfs(nodes, depth):
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for node in nodes:
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if isinstance(node, list):
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dfs(node, depth + 1)
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else:
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outlines.append((node["/Title"], depth, pdf.get_destination_page_number(node) + 1))
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dfs(pdf.outline, 0)
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return outlines
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except Exception:
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return []
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