413 lines
19 KiB
Python
413 lines
19 KiB
Python
from PyPDF2 import PdfReader, PdfWriter
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import re # 导入正则表达式库
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import os # 用于文件和文件夹操作
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from flask_app.main.merge_pdfs import merge_pdfs
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def clean_page_content(text, common_header):
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# 首先删除抬头公共部分
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if common_header: # 确保有公共抬头才进行替换
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for header_line in common_header.split('\n'):
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if header_line.strip(): # 只处理非空行
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# 替换首次出现的完整行
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text = re.sub(r'^' + re.escape(header_line.strip()) + r'\n?', '', text, count=1)
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# 删除页码 eg:89/129 这个代码分三步走可以把89/129完全删除
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text = re.sub(r'^\s*\d+\s*(?=\D)', '', text) # 删除开头的页码，仅当紧跟非数字字符时
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text = re.sub(r'\s+\d+\s*$', '', text) # 删除结尾的页码
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text = re.sub(r'\s*\/\s*\d+\s*', '', text) # 删除形如 /129 的页码
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return text
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#PYPDF2库
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def extract_common_header(pdf_path):
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from PyPDF2 import PdfReader
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pdf_document = PdfReader(pdf_path)
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headers = []
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total_pages = len(pdf_document.pages)
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# 确定要读取的页数和起始页
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if total_pages == 2:
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pages_to_read = 2
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start_page = 0
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else:
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pages_to_read = 3
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middle_page = total_pages // 2
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start_page = max(0, middle_page - 1)
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for i in range(start_page, min(start_page + pages_to_read, total_pages)):
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page = pdf_document.pages[i]
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text = page.extract_text() or ""
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if text:
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# 只取每页的前三行
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first_lines = text.strip().split('\n')[:3]
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headers.append(first_lines)
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if len(headers) < 2:
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return "" # 如果没有足够的页来比较，返回空字符串
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# 寻找每一行中的公共部分，按顺序保留
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common_headers = []
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for lines in zip(*headers):
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# 提取第一行的词汇顺序
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first_words = lines[0].split()
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# 筛选所有页面都包含的词汇，保持顺序
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common_line = [word for word in first_words if all(word in line.split() for line in lines[1:])]
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if common_line:
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common_headers.append(' '.join(common_line))
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return '\n'.join(common_headers)
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def save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page):
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"""
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从原始PDF截取指定范围的页面并保存到新的PDF文件中。
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如果 output_suffix 是 'notice'，则额外保存 start_page 之前的页面。
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参数:
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pdf_path (str): 原始PDF文件路径。
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output_folder (str): 输出文件夹路径。
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output_suffix (str): 输出文件的后缀，用于区分不同的提取。
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start_page (int): 起始页码（0基）。
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end_page (int): 结束页码（0基）。
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返回:
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str: 保存的PDF文件路径。如果提取失败，返回空字符串。
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"""
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try:
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# 获取文件基本名称
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base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
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# 构建主要输出文件路径
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output_pdf_path = os.path.join(output_folder, f"{base_file_name}_{output_suffix}.pdf")
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# 读取PDF文件
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pdf_document = PdfReader(pdf_path)
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total_pages = len(pdf_document.pages)
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# 检查起始和结束页码是否有效
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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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# 如果 output_suffix 是 'notice'，保存 start_page 之前的页面
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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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for page_num in range(0, start_page):
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before_doc.add_page(pdf_document.pages[page_num])
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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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print(f"已保存页面从 0 到 {start_page - 1} 为 {before_pdf_path}")
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# 提取指定范围的页面
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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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# 保存新的PDF文件
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with open(output_pdf_path, 'wb') as f_output:
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output_doc.write(f_output)
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print(f"{output_suffix} 已截取并保存页面从 {start_page + 1} 到 {end_page + 1} 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_pages_to_new_pdf: {e}")
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return "" # 返回空字符串
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def extract_pages_twice(pdf_path, output_folder, output_suffix):
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common_header = extract_common_header(pdf_path)
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last_begin_index = 0
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begin_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*招标公告|第一卷|投标邀请书')
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pdf_document = PdfReader(pdf_path)
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for i, page in enumerate(pdf_document.pages):
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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“第一章”开始的位置
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if begin_pattern.search(cleaned_text):
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last_begin_index = i # 更新最后匹配的索引，页码从0开始
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if output_suffix == "qualification":
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common_pattern = r'^(?:附录(?:一)?[：:]|附件(?:一)?[：:]|附表(?:一)?[：:])'
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# end_pattern = r'^(第[一二三四五六七八九十]+章\s*投标人须知|评标办法|评标办法前附表)'
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end_pattern = re.compile(
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common_pattern + r'(?!.*(?:资质|能力|信誉)).*$|' # 排除资质、能力、信誉的描述
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r'^(第[一二三四五六七八九十]+章\s*评标办法|评标办法前附表|投标人须知)', # 新增的匹配项
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re.MULTILINE
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)
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start_page = None
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end_page = None
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# 从章节开始后的位置进行检查
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for i, page in enumerate(pdf_document.pages[last_begin_index:], start=last_begin_index):
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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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# 确定起始页，需在last_begin_index之后
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if ("资格审查" in cleaned_text or "资质条件" in cleaned_text):
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if re.search(common_pattern, cleaned_text, re.MULTILINE):
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if start_page is None:
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start_page = i # 确保起始页不小于章节的开始页码
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# 确定结束页
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if start_page is not None and re.search(end_pattern, cleaned_text):
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if i > start_page:
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end_page = i
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break # 找到结束页后退出循环
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if start_page is None or end_page is None:
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print(f"twice: 未找到起始或结束页在文件 {pdf_path} 中！")
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return ""
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else:
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return save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page)
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elif output_suffix == "invalid":
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pdf_document = PdfReader(pdf_path)
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total_pages = len(pdf_document.pages)
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# 计算总页数的三分之二
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total = int(total_pages * 2 / 3)
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start_page = last_begin_index
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end_page = min(90, total)
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return save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page)
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def extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
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common_header=extract_common_header(pdf_path)
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# 打开PDF文件
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pdf_document = PdfReader(pdf_path)
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start_page = None
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end_page = None
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# 遍历文档的每一页，查找开始和结束短语的位置
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for i in range(len(pdf_document.pages)):
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page = pdf_document.pages[i]
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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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# print(cleaned_text)
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if re.search(begin_pattern, cleaned_text) and i > begin_page:
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if output_suffix == "invalid" and start_page: # 仅当提取Invalid的时候，判断初始页码是第一个匹配到的页码，因为招标编号可能存在多个，后面的覆盖前面
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continue
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else:
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start_page = i
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if start_page is not None and re.search(end_pattern, cleaned_text):
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# 如果output_suffix是"qualification"，调整条件检查
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if output_suffix == "qualification":
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condition = i > start_page
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else:
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condition = i > (start_page + 1)
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if condition:
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is_invalid_condition = output_suffix == "invalid" and i > 30 # 这边默认无效投标至少有30页
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if is_invalid_condition or output_suffix != "invalid":
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end_page = i
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break
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# 确保找到了起始和结束页面
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if start_page is None or end_page is None:
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if output_suffix == "qualification" or output_suffix =="invalid":
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return extract_pages_twice(pdf_path, output_folder, output_suffix)
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else:
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print(f"first: 未找到起始或结束页在文件 {pdf_path} 中！")
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return ""
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else:
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return save_pages_to_new_pdf(pdf_path, output_folder, output_suffix, start_page, end_page)
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def process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix):
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# 确保输出文件夹存在
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if not os.path.exists(output_folder):
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os.makedirs(output_folder)
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if os.path.isdir(input_path):
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generated_files = []
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# 遍历文件夹内的所有PDF文件
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for file in os.listdir(input_path):
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if file.endswith(".pdf"):
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pdf_path = os.path.join(input_path, file)
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output_pdf_path = extract_pages(pdf_path, output_folder, begin_pattern, begin_page, end_pattern,
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output_suffix)
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if output_pdf_path and os.path.isfile(output_pdf_path):
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generated_files.append(output_pdf_path)
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return generated_files
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elif os.path.isfile(input_path) and input_path.endswith(".pdf"):
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# 处理单个PDF文件
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output_pdf_path = extract_pages(input_path, output_folder, begin_pattern, begin_page, end_pattern,
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output_suffix)
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if output_pdf_path and os.path.isfile(output_pdf_path):
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return [output_pdf_path] # 以列表形式返回，以保持一致性
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else:
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print("提供的路径既不是文件夹也不是PDF文件。")
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return []
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def truncate_pdf_main(input_path, output_folder, selection):
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if selection == 1:
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# Configure patterns and phrases for "投标人须知前附表"
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begin_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*投标人须知')
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begin_page = 3
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end_pattern = re.compile(r'投标人须知正文')
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output_suffix = "tobidders_notice_table"
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elif selection == 2:
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# Configure patterns and phrases for "评标办法"
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begin_pattern = re.compile(
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r'第[一二三四五六七八九十]+章\s*评标办法') # 考虑到这种情况 '第三章 第三章 第三章 第三章 评标办法 评标办法 评标办法 评标办法'
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begin_page = 10
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end_pattern = re.compile(r'评标办法正文|评标办法')
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output_suffix = "evaluation_method"
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elif selection == 3:
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# Configure patterns and phrases for "投标人须知正文"
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begin_pattern = re.compile(r'投标人须知正文')
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begin_page = 5
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end_pattern = re.compile(
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r'^第[一二三四五六七八九十]+章\s*评标办法|^评标办法前附表|^附录(?:一)?[：:]|^附件(?:一)?[：:]|^附表(?:一)?[：:]',
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re.MULTILINE)
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output_suffix = "tobidders_notice"
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elif selection == 4:
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# 配置用于 "资格审查条件" 的正则表达式模式和短语
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common_pattern = r'^(?:附录(?:一)?[：:]|附件(?:一)?[：:]|附表(?:一)?[：:])'
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begin_pattern = re.compile(common_pattern + r'.*(?:资质|能力|信誉).*$', re.MULTILINE)
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begin_page = 5
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end_pattern = re.compile(
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common_pattern + r'(?!.*(?:资质|能力|信誉)).*$|' # 原有的模式
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r'^(第[一二三四五六七八九十]+章\s*评标办法|评标办法前附表)', # 新增的匹配项
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re.MULTILINE
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)
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output_suffix = "qualification"
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elif selection == 5:
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# 配置用于 "招标公告" 的正则表达式模式和短语
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begin_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*招标公告|第一卷|投标邀请书')
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begin_page = 0
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end_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*投标人须知', re.MULTILINE)
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output_suffix = "notice"
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elif selection == 6:
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# 配置用于 "无效标" 的正则表达式模式和短语
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begin_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*招标公告|第一卷|招标编号:|招标编号：')
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begin_page = 0
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end_pattern = re.compile(r'第[一二三四五六七八九十]+章\s*合同|[：:]清标报告|第二卷', re.MULTILINE)
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output_suffix = "invalid"
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else:
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print("无效的选择:请选择1-6")
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return None
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# Process the selected input
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return process_input(input_path, output_folder, begin_pattern, begin_page, end_pattern, output_suffix)
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def truncate_pdf_multiple(input_path, output_folder):
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truncate_files = []
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for selection in range(1, 5):
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files = truncate_pdf_main(input_path, output_folder, selection)
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truncate_files.extend(files)
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return truncate_files
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def merge_selected_pdfs(output_folder, truncate_files, output_path, base_file_name):
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"""
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合并 output_folder 中以 {base_file_name}_before.pdf 结尾的 PDF 文件，
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以及 truncate_files 中以指定后缀结尾的文件，按照指定顺序合并。
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参数：
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- output_folder (str): 包含以 {base_file_name}_before.pdf 结尾的 PDF 文件的文件夹路径。
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- truncate_files (list): 包含 PDF 文件路径的列表。
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- output_path (str): 合并后的 PDF 文件保存路径。
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- base_file_name (str): 用于匹配文件名的基础名称。
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"""
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# 1. 获取 output_folder 中所有文件
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try:
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all_output_files = os.listdir(output_folder)
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except FileNotFoundError:
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print(f"输出文件夹 '{output_folder}' 未找到。")
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return
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except PermissionError:
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print(f"没有权限访问输出文件夹 '{output_folder}'。")
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return
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# 2. 定义要选择的文件后缀及合并顺序，包括 before 文件
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desired_suffixes = [
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f'{base_file_name}_before.pdf',
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f'{base_file_name}_notice.pdf',
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f'{base_file_name}_tobidders_notice_table.pdf',
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f'{base_file_name}_tobidders_notice.pdf'
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]
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all_pdfs_to_merge = []
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for suffix in desired_suffixes:
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if suffix == f'{base_file_name}_before.pdf':
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# 从 output_folder 中选择以 {base_file_name}_before.pdf 结尾的文件
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matching_files = [
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os.path.join(output_folder, f)
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for f in all_output_files
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if f.endswith(suffix)
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]
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else:
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# 从 truncate_files 中选择以指定后缀结尾的文件
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matching_files = [f for f in truncate_files if f.endswith(suffix)]
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if matching_files:
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# 如果找到多个匹配的文件，按名称排序并添加
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matching_files_sorted = sorted(matching_files)
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all_pdfs_to_merge.extend(matching_files_sorted)
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for f in matching_files_sorted:
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print(f"选中文件: {f}")
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else:
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print(f"没有找到以 '{suffix}' 结尾的文件。")
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print(f"总共将要合并的 PDF 文件数量: {len(all_pdfs_to_merge)}")
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if not all_pdfs_to_merge:
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print("没有找到要合并的 PDF 文件。")
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return
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# 调用 merge_pdfs 函数进行合并
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merge_pdfs(all_pdfs_to_merge, output_path)
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print(f"已成功合并 PDF 文件到 '{output_path}'。")
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def truncate_pdf_specific_engineering(pdf_path, output_folder):
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"""
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处理 PDF 文件，选择 selection 为 5、1 和 3 的部分，并合并结果。
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Args:
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pdf_path (str): 要处理的 PDF 文件路径。
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output_folder (str): 截取后的文件保存文件夹路径。
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Returns:
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list: 截取的文件路径列表，包括合并后的文件路径（如果有）。
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"""
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try:
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base_file_name = os.path.splitext(os.path.basename(pdf_path))[0]
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truncate_files = []
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selections = [5, 1, 3] # 仅处理 selection 5、1 和 3
|
||
|
||
for selection in selections:
|
||
files = truncate_pdf_main(pdf_path, output_folder, selection)
|
||
if files:
|
||
if isinstance(files, list):
|
||
truncate_files.extend(files)
|
||
elif isinstance(files, str):
|
||
truncate_files.append(files)
|
||
|
||
if truncate_files:
|
||
merged_output_path = os.path.join(output_folder, f"{base_file_name}_merged_baseinfo.pdf")
|
||
merge_selected_pdfs(output_folder, truncate_files, merged_output_path, base_file_name)
|
||
truncate_files.append(merged_output_path)
|
||
print(f"已生成合并文件: {merged_output_path}")
|
||
else:
|
||
print(f"没有文件需要合并 for {pdf_path}")
|
||
|
||
return truncate_files
|
||
|
||
except Exception as e:
|
||
print(f"Error in truncate_pdf_specific_two: {e}")
|
||
return [] # 返回空列表表示失败
|
||
|
||
|
||
# TODO:需要完善二次请求。目前invalid一定能返回 前附表 须知正文如果为空的话要额外处理一下，比如说就不进行跳转（见xx表） 开评定标这里也要考虑 如果评分表为空，也要处理。
|
||
if __name__ == "__main__":
|
||
# input_path = "C:\\Users\\Administrator\\Desktop\\fsdownload\\4bda9fde-89fc-4e5e-94a4-ce6c43010f74\\ztbfile.pdf"
|
||
# output_folder = "C:\\Users\\Administrator\\Desktop\\fsdownload\\4bda9fde-89fc-4e5e-94a4-ce6c43010f74"
|
||
input_path="C:\\Users\\Administrator\\Desktop\\招标文件\\招标test文件夹\\zbtest16.pdf"
|
||
output_folder="C:\\Users\\Administrator\\Desktop\\招标文件\\special_output"
|
||
# files=truncate_pdf_multiple(input_path,output_folder)
|
||
files=truncate_pdf_specific_engineering(input_path,output_folder)
|
||
print(files)
|
||
# selection = 3 # 例如：1 - 投标人须知前附表, 2 - 评标办法, 3 - 投标人须知正文 4-资格审查条件 5-招标公告 6-无效标
|
||
# generated_files = truncate_pdf_main(input_path, output_folder, selection)
|
||
# # print("生成的文件:", generated_files)
|