scrapy spider中的2个函数和第二个不运行的函数

Question

我正在使用scrapy来获取页面上某些网址内的内容，类似于这里的问题：Use scrapy to get list of urls, and then scrape content inside those urls

我可以从我的开始网址（第一个def）获得subURL，但是，我的第二个def似乎没有通过。结果文件为空。我已经测试了scrapy shell中函数内部的内容，它正在获取我想要的信息，但是当我运行蜘蛛时却没有。

import scrapy
from scrapy.selector import Selector
#from scrapy import Spider
from WheelsOnlineScrapper.items import Dealer
from WheelsOnlineScrapper.url_list import urls
import logging
from urlparse import urljoin

logger = logging.getLogger(__name__)

class WheelsonlinespiderSpider(scrapy.Spider):
	logger.info('Spider starting')
	name = 'wheelsonlinespider'
	rotate_user_agent = True # lives in middleware.py and settings.py
	allowed_domains = ["https://wheelsonline.ca"]
	start_urls = urls # this list is created in url_list.py
	logger.info('URLs retrieved') 

	def parse(self, response):

		subURLs = []
		
		partialURLs = response.css('.directory_name::attr(href)').extract()
		
		for i in partialURLs:
			
			subURLs = urljoin('https://wheelsonline.ca/', i)
			yield scrapy.Request(subURLs, callback=self.parse_dealers)
			logger.info('Dealer ' + subURLs + ' fetched')



	def parse_dealers(self, response):


		logger.info('Beginning of page')
		
        dlr = Dealer()
		
	    #Extracting the content using css selectors
		try: 
			dlr['DealerName'] = response.css(".dealer_head_main_name::text").extract_first() + ' ' + response.css(".dealer_head_aux_name::text").extract_first()
		except TypeError:
			dlr['DealerName'] = response.css(".dealer_head_main_name::text").extract_first()

		dlr['MailingAddress'] = ','.join(response.css(".dealer_address_right::text").extract()) 
		dlr['PhoneNumber'] = response.css(".dealer_head_phone::text").extract_first()

		logger.info('Dealer fetched ' + dlr['DealerName'])
		
		yield dlr


		logger.info('End of page')

Answer 1

您的allowed_domains列表包含协议（https）。它应该只有documentation的域名​​：

allowed_domains = ["wheelsonline.ca"]

此外，您应该在日志中收到一条消息：

URLWarning：allowed_domains仅接受域，而不接受URL。忽略allowed_domains中的URL条目https://wheelsonline.ca