130 lines
5.7 KiB
Python
130 lines
5.7 KiB
Python
#flask_app/general/截取pdf通用函数.py
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import concurrent.futures
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import os
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import regex
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from PyPDF2 import PdfReader, PdfWriter
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from flask_app.general.clean_pdf import extract_common_header, clean_page_content
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from flask_app.general.format_change import docx2pdf
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def get_start_and_common_header(input_path,end_page):
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common_header = extract_common_header(input_path)
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last_begin_index = 0
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begin_pattern = regex.compile(
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r'.*(?<!见\s*)(?<!与\s*)(?<!"\s*)(?<!“\s*)(?<!”\s*)(?:招标公告|磋商公告|谈判公告|邀请书|邀请函|投标邀请|磋商邀请|谈判邀请)[\)）]?\s*$',
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regex.MULTILINE
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)
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# 新增目录匹配模式
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catalog_pattern = regex.compile(r'\s*目\s*录\s*$', regex.MULTILINE)
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pdf_document = PdfReader(input_path)
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for i, page in enumerate(pdf_document.pages):
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if i > end_page:
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return common_header, 0 # 如果页码大于end_page，直接返回last_begin_index=0
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text = page.extract_text()
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if text:
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cleaned_text = clean_page_content(text, common_header)
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# 检查是否存在"目录"
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if catalog_pattern.search(cleaned_text):
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continue # 如果存在目录，跳过当前页面
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if begin_pattern.search(cleaned_text):
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last_begin_index = i # 更新第一个匹配的索引，页码从0开始
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return common_header, last_begin_index
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return common_header, last_begin_index
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def check_pdf_pages(pdf_path, logger):
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try:
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reader = PdfReader(pdf_path)
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num_pages = len(reader.pages)
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logger.info(f"PDF '{pdf_path}' 的总页数为: {num_pages}")
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if num_pages <= 50:
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logger.info("PDF页数小于或等于50页，跳过切分逻辑。")
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return ['', '', '', '', '', '', '']
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# 若页数大于50页，返回None表示继续处理
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return None
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except Exception as e:
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logger.error(f"无法读取 PDF 页数: {e}")
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# 返回空列表意味着无法执行后续处理逻辑
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return ['', '', '', '', '', '', '']
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def save_extracted_pages(pdf_path,output_folder,start_page, end_page, output_suffix,common_header):
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try:
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# 检查 start_page 和 end_page 是否为 None
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if start_page is None or end_page is None:
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print("Error: start_page 或 end_page 为 None")
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return ""
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pdf_document = PdfReader(pdf_path)
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total_pages = len(pdf_document.pages)
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base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
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output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")
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if start_page < 0 or end_page >= total_pages or start_page > end_page:
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print(f"无效的页面范围: {start_page} 到 {end_page}")
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return ""
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if output_suffix == 'notice' and start_page > 0:
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before_pdf_path = os.path.join(output_folder, f"{base_file_name}_before.pdf")
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before_doc = PdfWriter()
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toc_page = -1
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# 查找目录页
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for page_num in range(min(start_page, total_pages)):
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page_text = pdf_document.pages[page_num].extract_text()
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cleaned_text = clean_page_content(page_text, common_header)
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if regex.search(r'目\s*录', cleaned_text, regex.MULTILINE):
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toc_page = page_num
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break
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# 确定截取的页数
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pages_to_extract = toc_page + 1 if toc_page != -1 else start_page
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# 提取页面
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for page_num in range(pages_to_extract):
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before_doc.add_page(pdf_document.pages[page_num])
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print(before_pdf_path)
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with open(before_pdf_path, 'wb') as f_before:
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before_doc.write(f_before)
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output_doc = PdfWriter()
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for page_num in range(start_page, end_page + 1):
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output_doc.add_page(pdf_document.pages[page_num])
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with open(output_pdf_path, 'wb') as f:
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output_doc.write(f)
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print(f"{output_suffix} 已截取并保存页面从 {start_page} 到 {end_page} 为 {output_pdf_path}")
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return output_pdf_path
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except Exception as e:
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print(f"Error in save_extracted_pages: {e}")
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return "" # 返回空字符串
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def is_pdf_or_doc(filename):
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# 判断文件是否为PDF或Word文档
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return filename.lower().endswith(('.pdf', '.doc', '.docx'))
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def convert_to_pdf(file_path):
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# 假设 docx2pdf 函数已经被定义，这里仅根据文件扩展名来决定是否需要转换
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if file_path.lower().endswith(('.doc', '.docx')):
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return docx2pdf(file_path)
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return file_path
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def get_invalid_file(file_path,output_folder,common_header):
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pdf_document = PdfReader(file_path)
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total_pages = len(pdf_document.pages)
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begin_pattern=[regex.compile(
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r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:公告|邀请书|邀请函|邀请).*|^第一卷|^投标邀请书|^投标邀请函|^投标邀请',regex.MULTILINE
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),
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regex.compile(
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r'.*(?<!见\s*)(?<!与\s*)(?<!"\s*)(?<!“\s*)(?<!”\s*)(?:招标公告|磋商公告|谈判公告|邀请书|邀请函|投标邀请|磋商邀请|谈判邀请)[\)）]?\s*$',
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regex.MULTILINE
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)]
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end_pattern=[regex.compile(
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r'第[一二三四五六七八九十]+章\s*合同|[：:]清标报告|^第二卷',
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regex.MULTILINE
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),
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regex.compile(r'^第[一二三四五六七八九十百千]+(?:章|部分).*?(?:响应|投标).*?格式.*', regex.MULTILINE),
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regex.compile(r"\s*(投标文件格式|响应文件格式|响应性文件格式)\s*"
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]
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