scrapy 爬虫框架中 ajax 异步加载 post请求方式的

scrapy 爬虫框架中 ajax 异步加载 post请求方式的处理方法：

以福建省公共资源交易电子公共服务网站为例https://www.fjggfw.gov.cn/Website/JYXXNew.aspx，爬取招标结果，打开F12控制台界面如下图所示：

Request Method:POST

post请求方式中主要是Form Data中的信息，及每次请求Cookie信息，通过构造Cookie与param，设置scrapy.FormRequest，即可对服务器发起请求

            try:
                yield scrapy.FormRequest(self.base_url, formdata= params, callback=self.parse, cookies=self.Cookie, dont_filter=True)
            except:
                print("FormRequest报错")
                pass

 完整代码如下：

import scrapy
import sys
sys.path.append(r'C:\Users\admin\Desktop\buildingS')
from  buildingS.items import BidItem
from urllib.parse import urlencode
import json
class BidSpider(scrapy.spiders.Spider):
    name = "bidVfj"
    allow_domains = ["fjggfw.gov.cn"]
    base_url = 'https://www.fjggfw.gov.cn/Website/AjaxHandler/BuilderHandler.ashx?'
    user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36'
    Cookie = {
        '_qddac': '4-3-1.4euvh3.51etrl.jz7ny77d',
        '__root_domain_v': '.fjggfw.gov.cn',
        '_qddaz': 'QD.hldktx.4myn8z.jz0rop48',
        'ASP.NET_SessionId': '2vw4lzuocibr4nnhxsthnkoa',
        'Hm_lvt_63d8823bd78e78665043c516ae5b1514': '1565232336,1565245654,1565318931,1565422427',
        'Hm_lvt_94bfa5b89a33cebfead2f88d38657023': '1565232336,1565245655,1565318931,1565422427',
        'Hm_lpvt_94bfa5b89a33cebfead2f88d38657023': '1565569989',
        'Hm_lpvt_63d8823bd78e78665043c516ae5b1514': '1565569990',
        '_qdda': '4-1.4euvh3',
        '_qddab': '4-okbsm1.jz7ny77h',
        '_qddamta_2852155767=': '4-0',
        '_qddagsx_02095bad0b': 'ba8daf85fe0dbeb0a65a7ea578a68929ff792177b87c13b3d9814691d5e079395d73da9a63d4e4dc40372ff0b2be56289e7c533dd0d63924c5efad41f77c98c4db44cb6ac7e47072e67fada11102036bc4b391cd9855444824b1f352724e11a0e0bd6359823b1633ef2881fecf9fed10d843e0803d0dad0f3f907099eb15e252'
    }
    def start_requests(self):
        pages = 10
        for page in range(1,pages):
            params = {
                'OPtype': 'GetListNew',
                "pageNo": str(page),
                "pageSize":'10',
                "proArea":'-1',
                'category':'GCJS',
                'announcementType': '-1',
                'ProType': '-1',
                'xmlx':'-1',
                "projectName":'',
                "TopTime":'2019-05-14 00:00:00',
                "EndTime":'2019-08-14 23:59:59',
            }
            try:
                yield scrapy.FormRequest(self.base_url, formdata= params, callback=self.parse, cookies=self.Cookie, dont_filter=True)
            except:
                print("FormRequest报错")
                pass


    def parse(self, response):
        print("*" * 50)
        item = BidItem()
        try:
            if response.text:  # str(response.content,'utf-8')
                jsons = json.loads(response.text)
                bids = jsons.get('data')
                for bid in bids:
                    item['name'] = bid.get('NAME')
                    item['district'] = bid.get('AREANAME')
                    item['endRegistration'] = None
                    item['type'] = bid.get('PROTYPE_TEXT')
                    item['purl'] = '--'
                    item['tenderee'] = '--'
                    item['tenderer'] = '--'
                    item['address'] = '--'
                    item['docnmb'] = bid.get('PLATFORM_CODE')
                    item['startaffich'] = bid.get('TM')
                    item['endaffich'] = None
                    item['startRegistration'] = None
                    yield item
        except:
            print('response 为空')
            pass