mirror of
https://github.com/infiniflow/ragflow.git
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d3d2ccc76c
### What problem does this PR solve? Feat: add more chunking method #11311 ### Type of change - [x] New Feature (non-breaking change which adds functionality)
599 lines
24 KiB
Python
599 lines
24 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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import json
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import logging
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import os
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import platform
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import re
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import subprocess
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import sys
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import tempfile
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import threading
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import time
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import zipfile
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from io import BytesIO
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from os import PathLike
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from pathlib import Path
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from queue import Empty, Queue
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from typing import Any, Callable, Optional
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import numpy as np
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import pdfplumber
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import requests
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from PIL import Image
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from strenum import StrEnum
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from deepdoc.parser.pdf_parser import RAGFlowPdfParser
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LOCK_KEY_pdfplumber = "global_shared_lock_pdfplumber"
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if LOCK_KEY_pdfplumber not in sys.modules:
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sys.modules[LOCK_KEY_pdfplumber] = threading.Lock()
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class MinerUContentType(StrEnum):
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IMAGE = "image"
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TABLE = "table"
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TEXT = "text"
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EQUATION = "equation"
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CODE = "code"
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LIST = "list"
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DISCARDED = "discarded"
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class MinerUParser(RAGFlowPdfParser):
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def __init__(self, mineru_path: str = "mineru", mineru_api: str = "http://host.docker.internal:9987", mineru_server_url: str = ""):
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self.mineru_path = Path(mineru_path)
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self.mineru_api = mineru_api.rstrip("/")
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self.mineru_server_url = mineru_server_url.rstrip("/")
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self.using_api = False
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self.outlines = []
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self.logger = logging.getLogger(self.__class__.__name__)
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def _extract_zip_no_root(self, zip_path, extract_to, root_dir):
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with zipfile.ZipFile(zip_path, "r") as zip_ref:
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if not root_dir:
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files = zip_ref.namelist()
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if files and files[0].endswith("/"):
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root_dir = files[0]
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else:
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root_dir = None
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if not root_dir or not root_dir.endswith("/"):
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self.logger.info(f"[MinerU] No root directory found, extracting all...fff{root_dir}")
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zip_ref.extractall(extract_to)
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return
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root_len = len(root_dir)
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for member in zip_ref.infolist():
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filename = member.filename
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if filename == root_dir:
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self.logger.info("[MinerU] Ignore root folder...")
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continue
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path = filename
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if path.startswith(root_dir):
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path = path[root_len:]
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full_path = os.path.join(extract_to, path)
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if member.is_dir():
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os.makedirs(full_path, exist_ok=True)
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else:
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os.makedirs(os.path.dirname(full_path), exist_ok=True)
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with open(full_path, "wb") as f:
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f.write(zip_ref.read(filename))
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def _is_http_endpoint_valid(self, url, timeout=5):
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try:
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response = requests.head(url, timeout=timeout, allow_redirects=True)
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return response.status_code in [200, 301, 302, 307, 308]
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except Exception:
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return False
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def check_installation(self, backend: str = "pipeline", server_url: Optional[str] = None) -> tuple[bool, str]:
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reason = ""
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valid_backends = ["pipeline", "vlm-http-client", "vlm-transformers", "vlm-vllm-engine"]
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if backend not in valid_backends:
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reason = "[MinerU] Invalid backend '{backend}'. Valid backends are: {valid_backends}"
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logging.warning(reason)
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return False, reason
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subprocess_kwargs = {
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"capture_output": True,
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"text": True,
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"check": True,
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"encoding": "utf-8",
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"errors": "ignore",
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}
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if platform.system() == "Windows":
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subprocess_kwargs["creationflags"] = getattr(subprocess, "CREATE_NO_WINDOW", 0)
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if server_url is None:
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server_url = self.mineru_server_url
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if backend == "vlm-http-client" and server_url:
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try:
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server_accessible = self._is_http_endpoint_valid(server_url + "/openapi.json")
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logging.info(f"[MinerU] vlm-http-client server check: {server_accessible}")
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if server_accessible:
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self.using_api = False # We are using http client, not API
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return True, reason
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else:
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reason = f"[MinerU] vlm-http-client server not accessible: {server_url}"
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logging.warning(f"[MinerU] vlm-http-client server not accessible: {server_url}")
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return False, reason
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except Exception as e:
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logging.warning(f"[MinerU] vlm-http-client server check failed: {e}")
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try:
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response = requests.get(server_url, timeout=5)
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logging.info(f"[MinerU] vlm-http-client server connection check: success with status {response.status_code}")
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self.using_api = False
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return True, reason
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except Exception as e:
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reason = f"[MinerU] vlm-http-client server connection check failed: {server_url}: {e}"
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logging.warning(f"[MinerU] vlm-http-client server connection check failed: {server_url}: {e}")
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return False, reason
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try:
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result = subprocess.run([str(self.mineru_path), "--version"], **subprocess_kwargs)
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version_info = result.stdout.strip()
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if version_info:
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logging.info(f"[MinerU] Detected version: {version_info}")
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else:
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logging.info("[MinerU] Detected MinerU, but version info is empty.")
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return True, reason
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except subprocess.CalledProcessError as e:
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logging.warning(f"[MinerU] Execution failed (exit code {e.returncode}).")
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except FileNotFoundError:
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logging.warning("[MinerU] MinerU not found. Please install it via: pip install -U 'mineru[core]'")
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except Exception as e:
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logging.error(f"[MinerU] Unexpected error during installation check: {e}")
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# If executable check fails, try API check
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try:
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if self.mineru_api:
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# check openapi.json
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openapi_exists = self._is_http_endpoint_valid(self.mineru_api + "/openapi.json")
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if not openapi_exists:
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reason = "[MinerU] Failed to detect vaild MinerU API server"
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return openapi_exists, reason
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logging.info(f"[MinerU] Detected {self.mineru_api}/openapi.json: {openapi_exists}")
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self.using_api = openapi_exists
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return openapi_exists, reason
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else:
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logging.info("[MinerU] api not exists.")
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except Exception as e:
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reason = f"[MinerU] Unexpected error during api check: {e}"
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logging.error(f"[MinerU] Unexpected error during api check: {e}")
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return False, reason
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def _run_mineru(
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self, input_path: Path, output_dir: Path, method: str = "auto", backend: str = "pipeline", lang: Optional[str] = None, server_url: Optional[str] = None, callback: Optional[Callable] = None
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):
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if self.using_api:
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self._run_mineru_api(input_path, output_dir, method, backend, lang, callback)
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else:
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self._run_mineru_executable(input_path, output_dir, method, backend, lang, server_url, callback)
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def _run_mineru_api(self, input_path: Path, output_dir: Path, method: str = "auto", backend: str = "pipeline", lang: Optional[str] = None, callback: Optional[Callable] = None):
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OUTPUT_ZIP_PATH = os.path.join(str(output_dir), "output.zip")
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pdf_file_path = str(input_path)
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if not os.path.exists(pdf_file_path):
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raise RuntimeError(f"[MinerU] PDF file not exists: {pdf_file_path}")
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pdf_file_name = Path(pdf_file_path).stem.strip()
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output_path = os.path.join(str(output_dir), pdf_file_name, method)
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os.makedirs(output_path, exist_ok=True)
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files = {"files": (pdf_file_name + ".pdf", open(pdf_file_path, "rb"), "application/pdf")}
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data = {
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"output_dir": "./output",
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"lang_list": lang,
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"backend": backend,
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"parse_method": method,
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"formula_enable": True,
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"table_enable": True,
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"server_url": None,
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"return_md": True,
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"return_middle_json": True,
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"return_model_output": True,
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"return_content_list": True,
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"return_images": True,
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"response_format_zip": True,
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"start_page_id": 0,
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"end_page_id": 99999,
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}
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headers = {"Accept": "application/json"}
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try:
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self.logger.info(f"[MinerU] invoke api: {self.mineru_api}/file_parse")
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if callback:
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callback(0.20, f"[MinerU] invoke api: {self.mineru_api}/file_parse")
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response = requests.post(url=f"{self.mineru_api}/file_parse", files=files, data=data, headers=headers, timeout=1800)
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response.raise_for_status()
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if response.headers.get("Content-Type") == "application/zip":
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self.logger.info(f"[MinerU] zip file returned, saving to {OUTPUT_ZIP_PATH}...")
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if callback:
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callback(0.30, f"[MinerU] zip file returned, saving to {OUTPUT_ZIP_PATH}...")
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with open(OUTPUT_ZIP_PATH, "wb") as f:
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f.write(response.content)
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self.logger.info(f"[MinerU] Unzip to {output_path}...")
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self._extract_zip_no_root(OUTPUT_ZIP_PATH, output_path, pdf_file_name + "/")
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if callback:
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callback(0.40, f"[MinerU] Unzip to {output_path}...")
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else:
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self.logger.warning("[MinerU] not zip returned from api：%s " % response.headers.get("Content-Type"))
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except Exception as e:
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raise RuntimeError(f"[MinerU] api failed with exception {e}")
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self.logger.info("[MinerU] Api completed successfully.")
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def _run_mineru_executable(
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self, input_path: Path, output_dir: Path, method: str = "auto", backend: str = "pipeline", lang: Optional[str] = None, server_url: Optional[str] = None, callback: Optional[Callable] = None
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):
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cmd = [str(self.mineru_path), "-p", str(input_path), "-o", str(output_dir), "-m", method]
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if backend:
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cmd.extend(["-b", backend])
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if lang:
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cmd.extend(["-l", lang])
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if server_url and backend == "vlm-http-client":
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cmd.extend(["-u", server_url])
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self.logger.info(f"[MinerU] Running command: {' '.join(cmd)}")
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subprocess_kwargs = {
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"stdout": subprocess.PIPE,
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"stderr": subprocess.PIPE,
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"text": True,
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"encoding": "utf-8",
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"errors": "ignore",
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"bufsize": 1,
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}
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if platform.system() == "Windows":
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subprocess_kwargs["creationflags"] = getattr(subprocess, "CREATE_NO_WINDOW", 0)
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process = subprocess.Popen(cmd, **subprocess_kwargs)
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stdout_queue, stderr_queue = Queue(), Queue()
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def enqueue_output(pipe, queue, prefix):
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for line in iter(pipe.readline, ""):
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if line.strip():
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queue.put((prefix, line.strip()))
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pipe.close()
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threading.Thread(target=enqueue_output, args=(process.stdout, stdout_queue, "STDOUT"), daemon=True).start()
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threading.Thread(target=enqueue_output, args=(process.stderr, stderr_queue, "STDERR"), daemon=True).start()
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while process.poll() is None:
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for q in (stdout_queue, stderr_queue):
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try:
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while True:
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prefix, line = q.get_nowait()
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if prefix == "STDOUT":
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self.logger.info(f"[MinerU] {line}")
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else:
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self.logger.warning(f"[MinerU] {line}")
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except Empty:
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pass
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time.sleep(0.1)
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return_code = process.wait()
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if return_code != 0:
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raise RuntimeError(f"[MinerU] Process failed with exit code {return_code}")
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self.logger.info("[MinerU] Command completed successfully.")
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def __images__(self, fnm, zoomin: int = 1, page_from=0, page_to=600, callback=None):
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self.page_from = page_from
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self.page_to = page_to
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try:
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with pdfplumber.open(fnm) if isinstance(fnm, (str, PathLike)) else pdfplumber.open(BytesIO(fnm)) as pdf:
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self.pdf = pdf
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self.page_images = [p.to_image(resolution=72 * zoomin, antialias=True).original for _, p in enumerate(self.pdf.pages[page_from:page_to])]
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except Exception as e:
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self.page_images = None
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self.total_page = 0
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logging.exception(e)
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def _line_tag(self, bx):
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pn = [bx["page_idx"] + 1]
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positions = bx.get("bbox", (0, 0, 0, 0))
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x0, top, x1, bott = positions
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if hasattr(self, "page_images") and self.page_images and len(self.page_images) > bx["page_idx"]:
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page_width, page_height = self.page_images[bx["page_idx"]].size
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x0 = (x0 / 1000.0) * page_width
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x1 = (x1 / 1000.0) * page_width
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top = (top / 1000.0) * page_height
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bott = (bott / 1000.0) * page_height
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return "@@{}\t{:.1f}\t{:.1f}\t{:.1f}\t{:.1f}##".format("-".join([str(p) for p in pn]), x0, x1, top, bott)
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def crop(self, text, ZM=1, need_position=False):
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imgs = []
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poss = self.extract_positions(text)
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if not poss:
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if need_position:
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return None, None
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return
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if not getattr(self, "page_images", None):
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self.logger.warning("[MinerU] crop called without page images; skipping image generation.")
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if need_position:
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return None, None
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return
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page_count = len(self.page_images)
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filtered_poss = []
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for pns, left, right, top, bottom in poss:
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if not pns:
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self.logger.warning("[MinerU] Empty page index list in crop; skipping this position.")
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continue
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valid_pns = [p for p in pns if 0 <= p < page_count]
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if not valid_pns:
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self.logger.warning(f"[MinerU] All page indices {pns} out of range for {page_count} pages; skipping.")
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continue
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filtered_poss.append((valid_pns, left, right, top, bottom))
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poss = filtered_poss
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if not poss:
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self.logger.warning("[MinerU] No valid positions after filtering; skip cropping.")
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if need_position:
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return None, None
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return
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max_width = max(np.max([right - left for (_, left, right, _, _) in poss]), 6)
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GAP = 6
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pos = poss[0]
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first_page_idx = pos[0][0]
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poss.insert(0, ([first_page_idx], pos[1], pos[2], max(0, pos[3] - 120), max(pos[3] - GAP, 0)))
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pos = poss[-1]
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last_page_idx = pos[0][-1]
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if not (0 <= last_page_idx < page_count):
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self.logger.warning(f"[MinerU] Last page index {last_page_idx} out of range for {page_count} pages; skipping crop.")
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if need_position:
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return None, None
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return
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last_page_height = self.page_images[last_page_idx].size[1]
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poss.append(
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(
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[last_page_idx],
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pos[1],
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pos[2],
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min(last_page_height, pos[4] + GAP),
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min(last_page_height, pos[4] + 120),
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)
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)
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positions = []
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for ii, (pns, left, right, top, bottom) in enumerate(poss):
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right = left + max_width
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if bottom <= top:
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bottom = top + 2
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for pn in pns[1:]:
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if 0 <= pn - 1 < page_count:
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bottom += self.page_images[pn - 1].size[1]
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else:
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self.logger.warning(f"[MinerU] Page index {pn}-1 out of range for {page_count} pages during crop; skipping height accumulation.")
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if not (0 <= pns[0] < page_count):
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self.logger.warning(f"[MinerU] Base page index {pns[0]} out of range for {page_count} pages during crop; skipping this segment.")
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continue
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img0 = self.page_images[pns[0]]
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x0, y0, x1, y1 = int(left), int(top), int(right), int(min(bottom, img0.size[1]))
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crop0 = img0.crop((x0, y0, x1, y1))
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imgs.append(crop0)
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if 0 < ii < len(poss) - 1:
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positions.append((pns[0] + self.page_from, x0, x1, y0, y1))
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bottom -= img0.size[1]
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for pn in pns[1:]:
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if not (0 <= pn < page_count):
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self.logger.warning(f"[MinerU] Page index {pn} out of range for {page_count} pages during crop; skipping this page.")
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continue
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page = self.page_images[pn]
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x0, y0, x1, y1 = int(left), 0, int(right), int(min(bottom, page.size[1]))
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cimgp = page.crop((x0, y0, x1, y1))
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imgs.append(cimgp)
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if 0 < ii < len(poss) - 1:
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positions.append((pn + self.page_from, x0, x1, y0, y1))
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bottom -= page.size[1]
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if not imgs:
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if need_position:
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return None, None
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return
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height = 0
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for img in imgs:
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height += img.size[1] + GAP
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height = int(height)
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width = int(np.max([i.size[0] for i in imgs]))
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pic = Image.new("RGB", (width, height), (245, 245, 245))
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height = 0
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for ii, img in enumerate(imgs):
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if ii == 0 or ii + 1 == len(imgs):
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img = img.convert("RGBA")
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overlay = Image.new("RGBA", img.size, (0, 0, 0, 0))
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||
overlay.putalpha(128)
|
||
img = Image.alpha_composite(img, overlay).convert("RGB")
|
||
pic.paste(img, (0, int(height)))
|
||
height += img.size[1] + GAP
|
||
|
||
if need_position:
|
||
return pic, positions
|
||
return pic
|
||
|
||
@staticmethod
|
||
def extract_positions(txt: str):
|
||
poss = []
|
||
for tag in re.findall(r"@@[0-9-]+\t[0-9.\t]+##", txt):
|
||
pn, left, right, top, bottom = tag.strip("#").strip("@").split("\t")
|
||
left, right, top, bottom = float(left), float(right), float(top), float(bottom)
|
||
poss.append(([int(p) - 1 for p in pn.split("-")], left, right, top, bottom))
|
||
return poss
|
||
|
||
def _read_output(self, output_dir: Path, file_stem: str, method: str = "auto", backend: str = "pipeline") -> list[dict[str, Any]]:
|
||
subdir = output_dir / file_stem / method
|
||
if backend.startswith("vlm-"):
|
||
subdir = output_dir / file_stem / "vlm"
|
||
json_file = subdir / f"{file_stem}_content_list.json"
|
||
|
||
if not json_file.exists():
|
||
raise FileNotFoundError(f"[MinerU] Missing output file: {json_file}")
|
||
|
||
with open(json_file, "r", encoding="utf-8") as f:
|
||
data = json.load(f)
|
||
|
||
for item in data:
|
||
for key in ("img_path", "table_img_path", "equation_img_path"):
|
||
if key in item and item[key]:
|
||
item[key] = str((subdir / item[key]).resolve())
|
||
return data
|
||
|
||
def _transfer_to_sections(self, outputs: list[dict[str, Any]], parse_method: str = None):
|
||
sections = []
|
||
for output in outputs:
|
||
match output["type"]:
|
||
case MinerUContentType.TEXT:
|
||
section = output["text"]
|
||
case MinerUContentType.TABLE:
|
||
section = output.get("table_body", "") + "\n".join(output.get("table_caption", [])) + "\n".join(output.get("table_footnote", []))
|
||
if not section.strip():
|
||
section = "FAILED TO PARSE TABLE"
|
||
case MinerUContentType.IMAGE:
|
||
section = "".join(output.get("image_caption", [])) + "\n" + "".join(output.get("image_footnote", []))
|
||
case MinerUContentType.EQUATION:
|
||
section = output["text"]
|
||
case MinerUContentType.CODE:
|
||
section = output["code_body"] + "\n".join(output.get("code_caption", []))
|
||
case MinerUContentType.LIST:
|
||
section = "\n".join(output.get("list_items", []))
|
||
case MinerUContentType.DISCARDED:
|
||
pass
|
||
|
||
if section and parse_method == "manual":
|
||
sections.append((section, output["type"], self._line_tag(output)))
|
||
elif section and parse_method == "paper":
|
||
sections.append((section + self._line_tag(output), output["type"]))
|
||
else:
|
||
sections.append((section, self._line_tag(output)))
|
||
return sections
|
||
|
||
def _transfer_to_tables(self, outputs: list[dict[str, Any]]):
|
||
return []
|
||
|
||
def parse_pdf(
|
||
self,
|
||
filepath: str | PathLike[str],
|
||
binary: BytesIO | bytes,
|
||
callback: Optional[Callable] = None,
|
||
*,
|
||
output_dir: Optional[str] = None,
|
||
backend: str = "pipeline",
|
||
lang: Optional[str] = None,
|
||
method: str = "auto",
|
||
server_url: Optional[str] = None,
|
||
delete_output: bool = True,
|
||
parse_method: str = "raw"
|
||
) -> tuple:
|
||
import shutil
|
||
|
||
temp_pdf = None
|
||
created_tmp_dir = False
|
||
|
||
# remove spaces, or mineru crash, and _read_output fail too
|
||
file_path = Path(filepath)
|
||
pdf_file_name = file_path.stem.replace(" ", "") + ".pdf"
|
||
pdf_file_path_valid = os.path.join(file_path.parent, pdf_file_name)
|
||
|
||
if binary:
|
||
temp_dir = Path(tempfile.mkdtemp(prefix="mineru_bin_pdf_"))
|
||
temp_pdf = temp_dir / pdf_file_name
|
||
with open(temp_pdf, "wb") as f:
|
||
f.write(binary)
|
||
pdf = temp_pdf
|
||
self.logger.info(f"[MinerU] Received binary PDF -> {temp_pdf}")
|
||
if callback:
|
||
callback(0.15, f"[MinerU] Received binary PDF -> {temp_pdf}")
|
||
else:
|
||
if pdf_file_path_valid != filepath:
|
||
self.logger.info(f"[MinerU] Remove all space in file name: {pdf_file_path_valid}")
|
||
shutil.move(filepath, pdf_file_path_valid)
|
||
pdf = Path(pdf_file_path_valid)
|
||
if not pdf.exists():
|
||
if callback:
|
||
callback(-1, f"[MinerU] PDF not found: {pdf}")
|
||
raise FileNotFoundError(f"[MinerU] PDF not found: {pdf}")
|
||
|
||
if output_dir:
|
||
out_dir = Path(output_dir)
|
||
out_dir.mkdir(parents=True, exist_ok=True)
|
||
else:
|
||
out_dir = Path(tempfile.mkdtemp(prefix="mineru_pdf_"))
|
||
created_tmp_dir = True
|
||
|
||
self.logger.info(f"[MinerU] Output directory: {out_dir}")
|
||
if callback:
|
||
callback(0.15, f"[MinerU] Output directory: {out_dir}")
|
||
|
||
self.__images__(pdf, zoomin=1)
|
||
|
||
try:
|
||
self._run_mineru(pdf, out_dir, method=method, backend=backend, lang=lang, server_url=server_url, callback=callback)
|
||
outputs = self._read_output(out_dir, pdf.stem, method=method, backend=backend)
|
||
self.logger.info(f"[MinerU] Parsed {len(outputs)} blocks from PDF.")
|
||
if callback:
|
||
callback(0.75, f"[MinerU] Parsed {len(outputs)} blocks from PDF.")
|
||
|
||
return self._transfer_to_sections(outputs, parse_method), self._transfer_to_tables(outputs)
|
||
finally:
|
||
if temp_pdf and temp_pdf.exists():
|
||
try:
|
||
temp_pdf.unlink()
|
||
temp_pdf.parent.rmdir()
|
||
except Exception:
|
||
pass
|
||
if delete_output and created_tmp_dir and out_dir.exists():
|
||
try:
|
||
shutil.rmtree(out_dir)
|
||
except Exception:
|
||
pass
|
||
|
||
|
||
if __name__ == "__main__":
|
||
parser = MinerUParser("mineru")
|
||
ok, reason = parser.check_installation()
|
||
print("MinerU available:", ok)
|
||
|
||
filepath = ""
|
||
with open(filepath, "rb") as file:
|
||
outputs = parser.parse_pdf(filepath=filepath, binary=file.read())
|
||
for output in outputs:
|
||
print(output)
|