python-网站抓取和屏幕截图

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我正在使用scrapy抓取一个网站,并将内部/外部链接存储在我的i??tems类中.

有什么办法可以取消链接时捕获的屏幕快照？

注意：该网站具有登录授权表.

我的代码(spider.py)

  from scrapy.spider import BaseSpider
  from scrapy.contrib.spiders.init import InitSpider
  from scrapy.http import Request, FormRequest
  from scrapy.selector import HtmlXPathSelector
  from tutorial.items import DmozItem
  from scrapy.contrib.spiders import CrawlSpider, Rule
  from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
  import urlparse
  from scrapy import log

  class MySpider(CrawlSpider):

      items = []
      failed_urls = []
      duplicate_responses = []

      name = 'myspiders'
      allowed_domains = ['someurl.com']
      login_page = 'someurl.com/login_form'
      start_urls = 'someurl.com/'

      rules = [Rule(SgmlLinkExtractor(deny=('logged_out', 'logout',)), follow=True, callback='parse_start_url')]

      def start_requests(self):

          yield Request(
              url=self.login_page,
              callback=self.login,
              dont_filter=False
              )


      def login(self, response):
          """Generate a login request."""
          return FormRequest.from_response(response,
            formnumber=1,
            formdata={'username': 'username', 'password': 'password' },
            callback=self.check_login_response)


      def check_login_response(self, response):
          """Check the response returned by a login request to see if we are
          successfully logged in.
          """
          if "Logout" in response.body:
              self.log("Successfully logged in. Let's start crawling! :%s" % response, level=log.INFO)
              self.log("Response Url : %s" % response.url, level=log.INFO)

              yield Request(url=self.start_urls)
          else:
              self.log("Bad times :(", loglevel=log.INFO)


      def parse_start_url(self, response):


          # Scrape data from page
          hxs = HtmlXPathSelector(response)

          self.log('response came in from : %s' % (response), level=log.INFO)

          # check for some important page to crawl
          if response.url == 'someurl.com/medical/patient-info' :

              self.log('yes I am here', level=log.INFO)

              urls = hxs.select('//a/@href').extract()
              urls = list(set(urls))


              for url in urls :

                  self.log('URL extracted : %s' % url, level=log.INFO)

                  item = DmozItem()

                  if response.status == 404 or response.status == 500:
                      self.failed_urls.append(response.url)
                      self.log('failed_url : %s' % self.failed_urls, level=log.INFO)
                      item['failed_urls'] = self.failed_urls

                  else :

                      if url.startswith('http') :
                          if url.startswith('someurl.com'):
                              item['internal_link'] = url

                              # Need to capture screenshot of the extracted url here

                              self.log('internal_link :%s' % url, level=log.INFO)
                          else :
                              item['external_link'] = url

                              # Need to capture screenshot of the extracted url here

                              self.log('external_link :%s' % url, level=log.INFO)

                  self.items.append(item)

              self.items = list(set(self.items))
              return self.items
          else :
              self.log('did not recieved expected response', level=log.INFO)

更新：我正在使用虚拟机(通过腻子登录)

解决方法:

您可以看一下splash这样的渲染服务器

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