crossborder/crossborder/guangdong/selenium_guangdong_city.py

import argparse
import random
import re
import time
from datetime import datetime, timedelta

from selenium import webdriver
from selenium.common import TimeoutException
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait

from crossborder.utils.db_helper import DBHelper
from guangdong.guangdong_gongbei_parse_excel import parse_region_table, calculate_monthly_data
from guangdong.guangdong_sub_customs_parse_excel import parse_excel
from crossborder.utils.constants import DOWNLOAD_DIR
from crossborder.utils.constants import GUANGDONG_CUSTOMS_URL
from crossborder.utils.download_utils import configure_stealth_options, generate_month_sequence, download_excel, download_excel2, \
    batch_download_excel
from crossborder.utils.log import log
from crossborder.utils.parse_utils import traverse_and_process

download_dir = DOWNLOAD_DIR / "guangdong"



def generate_target_title(check_year, check_month, customs_name):
    """生成正则匹配的标题模式"""
    global target_title
    if customs_name == "广州海关":
        return rf'{check_year}\s*年\s*(?:1[-－]\s*)?{check_month}月广州关区所辖7地市进出口综合统计资料'
    elif customs_name == "深圳海关":
        return rf"{check_year}\s*年\s*(?:1[-－]\s*)?{check_month}月(深圳海关|深圳关区)综合统计资料"
    elif customs_name == "拱北海关":
        return rf"\S+市{check_year}\s*年\s*(?:1[-－]\s*)?{check_month}月对外贸易进出口统计表"
    elif customs_name == "汕头海关":
        return rf"5市报表{check_year}年(?:1[-－]\s*{check_month}月|{check_month}月)（人民币）"
    elif customs_name == "黄埔海关":
        return rf"{check_year}年\s*(?:1[-－]\s*)?{check_month}月东莞市进出口企业性质总值表"
    elif customs_name == "江门海关":
        if check_month == 3:
            target_title = rf"{check_year}年\s*(?:一季度|前{check_month}个月|\s*{check_month}月)[\u4e00-\u9fa5]+市外贸进出口有关情况统计表（以人民币计价）"
        elif check_month == 12:
            target_title = rf"{check_year}年(?:\s*{check_month}月)?\s*[\u4e00-\u9fa5]+市外贸进出口有关情况统计表（以人民币计价）"
        else:
            target_title = rf"{check_year}年\s*前?{check_month}个?月.*外贸进出口有关情况统计表（以人民币计价）"
        return target_title
    elif customs_name == "湛江海关":
        if check_month == 3:
            target_title = rf"{check_year}年\s*(?:一季度|前3个月|3月).*外贸进出口数据"
        elif check_month == 9:
            target_title = rf"{check_year}年\s*(?:前三季度|前9个月|9月).*外贸进出口数据"
        elif check_month == 12:
            target_title = rf'^{check_year}年(?:及{check_month}月份)?湛江市、茂名市(?:外贸)?进出口数据'
        else:
            target_title = rf"{check_year}年\s*前?{check_month}个?月.*(外贸)?进出口数据"
        return target_title
    else:
        return rf"{check_year}\s*年\s*(?:1[-－]\s*)??{check_month}月{customs_name}进出口综合统计资料"




def detect_latest_month(driver,customs_name):
    """三级回溯智能检测最新有效月份"""
    current_date = datetime.now()
    for offset in range(0, 3):
        check_date = current_date - timedelta(days=offset * 30)
        check_year = check_date.year
        check_month = check_date.month

        # 根据海关名称生成对应的标题
        target_title = generate_target_title(check_year, check_month, customs_name)

        try:
            WebDriverWait(driver, 10).until(
                EC.presence_of_element_located((By.CLASS_NAME, "conList_ul"))
            )

            # 获取所有 <a> 标签
            links = driver.find_elements(By.XPATH, '//a[@title]')

            # 使用 Python 正则匹配 title
            for link in links:
                title = link.get_attribute('title')
                if re.search(target_title, title, re.IGNORECASE):
                    log.info(f"【{customs_name}】最新月份数据 {check_year}-{check_month}：{title}")
                    return check_year, check_month

        except Exception as e:
            log.info(f"未找到 {target_title}: {e}")
            continue
    raise Exception("三个月内未找到有效数据")

def process_month_data(driver, year, month, customs_name,found_count, max_retries=3):
    """带重试机制的表格数据处理"""
    target_title = generate_target_title(year, month, customs_name)


    links = driver.find_elements(By.XPATH, '//a[@title]')

    for link in links:
        try:
            title = link.get_attribute('title')
            if re.search(target_title, title, re.IGNORECASE):
                # log.info(f"【{customs_name}】匹配到目标: {title}")
                url = link.get_attribute("href")

                for attempt in range(max_retries):
                    try:
                        if customs_name in ['汕头海关', '江门海关']:
                            download_excel2(driver, link, year, month, title, download_dir)
                        elif customs_name in ['湛江海关', '广州海关']:
                            batch_download_excel(driver, url, year, month, title, download_dir)
                        elif customs_name == "拱北海关":
                            parse_region_table(driver, url, year, month, title)
                        else:
                            download_excel(driver, url, year, month, title, download_dir)
                        found_count += 1
                        time.sleep(random.uniform(0.5, 1.5))  # 下载间隔
                        break
                    except Exception as e:
                        log.info(f"【{customs_name}】第 {attempt + 1} 次重试失败: {str(e)}")
                        if attempt + 1 == max_retries:
                            log.info(f"【{customs_name}】已达最大重试次数，放弃采集: {title}")
        except Exception as e:
            log.info(f"无法获取 title 属性: {e}")

    log.info(f"本页找到{found_count}个有效表格")
    return found_count


def reverse_crawler(driver, target_months,  customs_name):
    """逆向分页抓取核心（优化分页逻辑）"""
    processed_months = set()
    # target_months = [(2023, 5), (2023, 4)]
    page = 1
    for year, month in target_months:
        log.info(f"开始处理{customs_name} {year}年{month}月数据".center(55, "="))

        WebDriverWait(driver, 15).until(
            EC.presence_of_element_located((By.CLASS_NAME, "conList_ul"))
        )

        found_tables = 0
        table_nums = 1

        if  customs_name == "拱北海关" or customs_name == "江门海关":
            table_nums = 2

        while True:
            # 智能等待页面稳定
            random_sleep(base=2, variance=3)

            try:
                log.info(f"【{customs_name}】当前页面：{driver.current_url}, 第{page}页")
                # 处理当前页面的表格数据
                found = process_month_data(driver, year, month ,customs_name,found_tables)
                found_tables += found

                # 完成四个表格采集
                if found_tables >= table_nums:
                    log.info(f"【{customs_name}】已完成{year}年{month}月全部表格采集")
                    processed_months.add((year, month))
                    break

                log.info(f"【{customs_name}】第{page}页已采集表格数：{found_tables}/{table_nums},前往下一页采集")
                # 分页操作（增强定位稳定性）
                WebDriverWait(driver, 15).until(
                    EC.element_to_be_clickable((By.XPATH, '//a[contains(text(),"下一页")]'))
                ).click()

                page += 1


            except TimeoutException:
                log.info(f"未找到更多分页，已采集表格数：{found_tables}/{table_nums}")
                break
            except Exception as e:
                log.info(f"分页异常：{str(e)}")
                handle_retry(driver)  # 异常恢复函数
                break

    return processed_months

def handle_retry(driver):
    """异常恢复处理"""
    try:
        driver.refresh()
        WebDriverWait(driver, 15).until(
            EC.presence_of_element_located((By.CLASS_NAME, "conList_ul"))
        )
        log.info("浏览器异常已恢复")
    except:
        log.info("需要人工干预的严重错误")
        raise


def random_sleep(base=2, variance=5):
    """智能随机等待"""
    sleep_time = base + random.random() * variance
    time.sleep(sleep_time)


# def process_customs(customs_name, args):
#     """处理单个海关的数据抓取任务"""
#     options = configure_stealth_options(download_dir)
#     driver = webdriver.Firefox(options=options)
#
#     try:
#         driver.get(GUANGDONG_CUSTOMS_URL[customs_name])
#         valid_year, valid_month = detect_latest_month(driver, customs_name)
#         log.info(f"检测到{customs_name}最新有效数据：{valid_year}-{valid_month:02d}")
#
#         if customs_name in ['汕头海关', '拱北海关', '江门海关']:
#             skip_january = False
#         else:
#             skip_january = True
#
#         if args.year:
#             target_months = generate_month_sequence(valid_year, valid_month, args.year, skip_january)
#         else:
#             target_months = generate_month_sequence(valid_year, valid_month)
#
#         log.info(f"目标采集月份序列：{target_months}")
#         reverse_crawler(driver, target_months, customs_name)
#         log.info(f"{customs_name} {len(target_months)}个月份数据已采集完毕")
#         return customs_name, True
#     except Exception as e:
#         log.info(f"[错误] 采集失败：{customs_name} - {str(e)}")
#         return customs_name, False
#     finally:
#         driver.quit()
#
#
# def main():
#     parser = argparse.ArgumentParser(description='海关数据智能抓取系统')
#     parser.add_argument('--year', type=int, default=None,
#                         help='终止年份（如2023），未指定时抓取最新两个月')
#     args = parser.parse_args()
#
#     customs_list = GUANGDONG_CUSTOMS_URL.keys()
#
#     # 使用线程池并发采集
#     with ThreadPoolExecutor(max_workers=3) as executor:
#         futures = []
#         for customs_name in customs_list:
#             future = executor.submit(process_customs, customs_name, args)
#             futures.append(future)
#
#         for future in as_completed(futures):
#             customs_name, success = future.result()
#             if success:
#                 log.info(f"[完成] {customs_name} 数据采集成功")
#             else:
#                 log.info(f"[失败] {customs_name} 数据采集失败")
#
#     log.info("\n广东省所有海关数据采集完成。")

def main():
    """主入口（优化参数处理逻辑）"""
    parser = argparse.ArgumentParser(description='海关数据智能抓取系统')
    parser.add_argument('--year', type=int, default=None,
                        help='终止年份（如2023），未指定时抓取最新两个月')
    args = parser.parse_args()
    driver = webdriver.Firefox(options=configure_stealth_options(download_dir))
    for customs_name in GUANGDONG_CUSTOMS_URL.keys():
        try:
            driver.get(GUANGDONG_CUSTOMS_URL[customs_name])
            log.info(f"【{customs_name}】数据采集开始……")
            valid_year, valid_month = detect_latest_month(driver, customs_name)
            log.info(f"【{customs_name}】检测到最新有效数据：{valid_year}-{valid_month:02d}")

            if customs_name in ['汕头海关', '拱北海关']:
                skip_january = False
            else:
                skip_january = True

            if args.year:
                target_months = generate_month_sequence(valid_year, valid_month, args.year, skip_january)
            else:
                target_months = generate_month_sequence(valid_year, valid_month)

            log.info(f"【{customs_name}】目标采集月份序列：{target_months}")
            reverse_crawler(driver, target_months, customs_name)

            if customs_name == '拱北海关':
                for year, month in target_months:
                    log.info(f"【{customs_name}】{year}-{month:02d}单月数据计算中...")
                    calculate_monthly_data(year, month)

            log.info(f"【{customs_name}】{len(target_months)}个月份数据已采集完毕".center(66, "="))
        finally:
           pass

    driver.quit()
    log.info("【广东省】数据抓取结束".center(66, "*"))
    log.info("\n广东省数据清洗入库中...")
    traverse_and_process(download_dir, parse_excel, province_name="guangdong")
    log.info("\n广东省地级市数据同比更新中...")
    db_helper = DBHelper()
    db_helper.update_prov_yoy("广东省")
    log.info("\n广东省地级市数据同比更新结束")

if __name__ == "__main__":
    main()