doc_ocr_process.py
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import os
import time
import fitz
import signal
import base64
import asyncio
import aiohttp
# from openpyxl import Workbook
from apps.doc.ocr.wb import BSWorkbook, Workbook
from django.core.management import BaseCommand
from settings import conf
from common.mixins import LoggerMixin
from common.tools.file_tools import write_zip_file
from common.tools.pdf_to_img import PDFHandler
from apps.doc.models import DocStatus, HILDoc, AFCDoc, Keywords
from apps.doc.named_enum import KeywordsType
from apps.doc import consts
from apps.doc.ocr.edms import EDMS, rh
class Command(BaseCommand, LoggerMixin):
def __init__(self):
super().__init__()
self.log_base = '[doc ocr process]'
# 处理文件开关
self.switch = True
# 数据目录
self.data_dir = conf.DATA_DIR
# pdf页面转图片
self.zoom_x = 2.0
self.zoom_y = 2.0
self.trans = fitz.Matrix(self.zoom_x, self.zoom_y).preRotate(0) # zoom factor 2 in each dimension
# ocr相关
self.ocr_url = conf.OCR_URL
self.ocr_header = {
'X-Auth-Token': conf.OCR_TOKEN,
'Content-Type': 'application/json'
}
# EDMS web_service_api
self.edms = EDMS(conf.EDMS_USER, conf.EDMS_PWD)
# 优雅退出信号：15
signal.signal(signal.SIGTERM, self.signal_handler)
def signal_handler(self, sig, frame):
self.switch = False # 停止处理文件
def get_doc_info(self):
task_str, is_priority = rh.dequeue()
if task_str is None:
self.cronjob_log.info('{0} [get_doc_info] [queue empty]'.format(self.log_base))
return None, None
business_type, doc_id_str = task_str.split(consts.SPLIT_STR)
doc_id = int(doc_id_str)
doc_class = HILDoc if business_type == consts.HIL_PREFIX else AFCDoc
# doc_info = doc_class.objects.filter(id=doc_id, status=DocStatus.INIT.value).values(
# 'id', 'metadata_version_id', 'application_id', 'document_name', 'document_scheme').first()
doc = doc_class.objects.filter(id=doc_id).first()
if doc is None:
self.cronjob_log.warn('{0} [get_doc_info] [doc not exist] [task_str={1}] [is_priority={2}]'.format(
self.log_base, task_str, is_priority))
return None, None
elif doc.status != DocStatus.INIT.value:
self.cronjob_log.warn('{0} [get_doc_info] [doc status error] [task_str={1}] [is_priority={2}] '
'[doc_status={3}]'.format(self.log_base, task_str, is_priority, doc.status))
return None, None
doc.status = DocStatus.PROCESSING.value
doc.save()
self.cronjob_log.info('{0} [get_doc_info] [success] [task_str={1}] [is_priority={2}]'.format(
self.log_base, task_str, is_priority))
return doc, business_type
def pdf_download(self, doc, business_type):
if doc is None:
return None, None, None, None
# TODO EDMS下载pdf
doc_data_path = os.path.join(self.data_dir, business_type, str(doc.id))
os.makedirs(doc_data_path, exist_ok=True)
pdf_path = os.path.join(doc_data_path, '{0}.pdf'.format(doc.id))
if not doc.application_id.startswith(consts.FIXED_APPLICATION_ID_PREFIX):
self.edms.download(pdf_path, doc.metadata_version_id)
excel_path = os.path.join(doc_data_path, '{0}.xlsx'.format(doc.id))
src_excel_path = os.path.join(doc_data_path, 'src.xlsx')
self.cronjob_log.info('{0} [pdf download success] [business_type={1}] [doc_id={2}] [pdf_path={3}]'.format(
self.log_base, business_type, doc.id, pdf_path))
return doc_data_path, excel_path, src_excel_path, pdf_path
@staticmethod
def append_sheet(wb, sheets_list, img_name, role_summary):
for i, sheet in enumerate(sheets_list):
sheet_name = '{0}_{1}'.format(img_name, i)
role_summary['银行-户名'].append((sheet_name, 1, None, None, None, None, None))
ws = wb.create_sheet(sheet_name)
cells = sheet.get('cells')
for cell in cells:
c1 = cell.get('start_column')
# c2 = cell.get('end_column')
r1 = cell.get('start_row')
# r2 = cell.get('end_row')
words = cell.get('words')
ws.cell(row=r1+1, column=c1+1, value=words)
@staticmethod
def get_ocr_json(img_path):
with open(img_path, "rb") as f:
base64_data = base64.b64encode(f.read())
return {'imgBase64': base64_data.decode('utf-8')}
async def fetch_ocr_result(self, img_path):
async with aiohttp.ClientSession(
headers=self.ocr_header, connector=aiohttp.TCPConnector(ssl=False)
) as session:
json_data = self.get_ocr_json(img_path)
async with session.post(self.ocr_url, json=json_data) as response:
return await response.json()
async def img_ocr_excel(self, wb, img_path, role_summary):
res = await self.fetch_ocr_result(img_path)
self.cronjob_log.info('{0} [fetch ocr result success] [img={1}] [res={2}]'.format(self.log_base, img_path, res))
sheets_list = res.get('result').get('res')
img_name = os.path.basename(img_path)
self.append_sheet(wb, sheets_list, img_name, role_summary)
# TODO 细化文件状态，不同异常状态采取不同的处理
# TODO 调用接口重试
def handle(self, *args, **kwargs):
sleep_second = int(conf.SLEEP_SECOND)
max_sleep_second = int(conf.MAX_SLEEP_SECOND)
while self.switch:
# 1. 从队列获取文件信息
doc, business_type = self.get_doc_info()
try:
# 2. 从EDMS获取PDF文件
doc_data_path, excel_path, src_excel_path, pdf_path = self.pdf_download(doc, business_type)
# 队列为空时的处理
if pdf_path is None:
time.sleep(sleep_second)
sleep_second = min(max_sleep_second, sleep_second+5)
continue
sleep_second = int(conf.SLEEP_SECOND)
# 3.PDF文件提取图片
start_time = time.time()
img_save_path = os.path.join(doc_data_path, 'img')
self.cronjob_log.info('{0} [pdf to img start] [business_type={1}] [doc_id={2}]'.format(
self.log_base, business_type, doc.id))
pdf_handler = PDFHandler(pdf_path, img_save_path)
pdf_handler.extract_image()
self.cronjob_log.info('{0} [pdf to img end] [business_type={1}] [doc_id={2}]'.format(
self.log_base, business_type, doc.id))
write_zip_file(img_save_path, os.path.join(doc_data_path, '{0}_img.zip'.format(doc.id)))
# 4.图片调用算法判断是否为银行流水, 图片调用算法OCR为excel文件
role_summary = {
'银行-户名': []
}
# interest_keyword = Keywords.objects.filter(
# type=KeywordsType.INTEREST.value).values_list('keyword', flat=True)
# salary_keyword = Keywords.objects.filter(
# type=KeywordsType.SALARY.value).values_list('keyword', flat=True)
# loan_keyword = Keywords.objects.filter(type=KeywordsType.LOAN.value).values_list('keyword', flat=True)
# wb = BSWorkbook(interest_keyword, salary_keyword, loan_keyword)
wb = Workbook()
loop = asyncio.get_event_loop()
tasks = [self.img_ocr_excel(wb, img_path, role_summary) for img_path in pdf_handler.img_path_list]
loop.run_until_complete(asyncio.wait(tasks))
# loop.close()
# 整合excel文件
# wb.save(src_excel_path)
# wb.rebuild(role_summary)
wb.save(excel_path)
except Exception as e:
doc.status = DocStatus.PROCESS_FAILED.value
doc.save()
self.cronjob_log.error('{0} [process failed] [business_type={1}] [doc_id={2}] [err={3}]'.format(
self.log_base, business_type, doc.id, e))
else:
try:
# 5.上传至EDMS
# self.edms.upload(excel_path, doc, business_type)
print('upload pass')
except Exception as e:
doc.status = DocStatus.UPLOAD_FAILED.value
doc.save()
self.cronjob_log.error('{0} [upload failed] [business_type={1}] [doc_id={2}] [err={3}]'.format(
self.log_base, business_type, doc.id, e))
else:
doc.status = DocStatus.COMPLETE.value
doc.save()
end_time = time.time()
speed_time = int(end_time - start_time)
self.cronjob_log.info('{0} [doc process complete] [business_type={1}] [doc_id={2}] '
'[speed_time={3}]'.format(self.log_base, business_type, doc.id, speed_time))
self.cronjob_log.info('{0} [stop safely]'.format(self.log_base))