Python Scrapy爬虫程序未处理XHR请求
我的爬行器只在前10页上爬行,所以我假设它没有通过请求进入LoadMore按钮 我正在抓取此网站: 我的蜘蛛代码:Python Scrapy爬虫程序未处理XHR请求,python,web-scraping,xmlhttprequest,scrapy,scrape,Python,Web Scraping,Xmlhttprequest,Scrapy,Scrape,我的爬行器只在前10页上爬行,所以我假设它没有通过请求进入LoadMore按钮 我正在抓取此网站: 我的蜘蛛代码: import scrapy from scrapy.conf import settings from scrapy.http import Request from scrapy.selector import Selector from reviews.items import ReviewItem class T3Spider(scrapy.Spider): na
import scrapy
from scrapy.conf import settings
from scrapy.http import Request
from scrapy.selector import Selector
from reviews.items import ReviewItem
class T3Spider(scrapy.Spider):
name = "t3" #spider name to call in terminal
allowed_domains = ['t3.com'] #the domain where the spider is allowed to crawl
start_urls = ['http://www.t3.com/reviews'] #url from which the spider will start crawling
def parse(self, response):
sel = Selector(response)
review_links = sel.xpath('//div[@id="content"]//div/div/a/@href').extract()
for link in review_links:
yield Request(url="http://www.t3.com"+link, callback=self.parse_review)
#if there is a load-more button:
if sel.xpath('//*[@class="load-more"]'):
req = Request(url=r'http://www\.t3\.com/more/reviews/latest/\d+', headers = {"Referer": "http://www.t3.com/reviews", "X-Requested-With": "XMLHttpRequest"}, callback=self.parse)
yield req
else:
return
def parse_review(self, response):
pass #all my scraped item fields
我做错了什么?对不起,我是新来的。感谢您的时间、耐心和帮助。如果您检查“加载更多”按钮,您将找不到任何关于加载更多评论链接构造方式的指示。背后的想法相当简单-后面的数字http://www.t3.com/more/reviews/latest/
看起来像是上次加载文章的时间戳。您可以通过以下方式获得:
import calendar
from dateutil.parser import parse
import scrapy
from scrapy.http import Request
class T3Spider(scrapy.Spider):
name = "t3"
allowed_domains = ['t3.com']
start_urls = ['http://www.t3.com/reviews']
def parse(self, response):
reviews = response.css('div.listingResult')
for review in reviews:
link = review.xpath("a/@href").extract()[0]
yield Request(url="http://www.t3.com" + link, callback=self.parse_review)
# TODO: handle exceptions here
# extract the review date
time = reviews[-1].xpath(".//time/@datetime").extract()[0]
# convert a date into a timestamp
timestamp = calendar.timegm(parse(time).timetuple())
url = 'http://www.t3.com/more/reviews/latest/%d' % timestamp
req = Request(url=url,
headers={"Referer": "http://www.t3.com/reviews", "X-Requested-With": "XMLHttpRequest"},
callback=self.parse)
yield req
def parse_review(self, response):
print response.url
注:
- 这需要安装模块
- 你应该重新检查代码,确保你得到了所有的评论而没有跳过任何一个
- 你应该以某种方式结束这种“加载更多”的事情