我试图从一个网站解析数据，我使用scrapy，但该网站受到cloudflare的保护。我找到了一个解决方案，使用cloudscraper，这个cloudscraper确实可以绕过保护。但我不明白它如何与scrapy一起使用。
想写这样的东西

import scrapy
   from scrapy.xlib.pydispatch import dispatcher
   import cloudscraper
   import requests
   from scrapy.http import Request, FormRequest
   class PycoderSpider(scrapy.Spider):
      name = 'armata_exper'
      start_urls = ['https://arma-models.ru/catalog/sbornye_modeli/?limit=48']
      def start_requests(self):
         url = "https://arma-models.ru/catalog/sbornye_modeli/?limit=48"
         scraper = cloudscraper.CloudScraper()
         cookie_value, user_agent = scraper.get_tokens(url)
         yield scrapy.Request(url, cookies=cookie_value, headers={'User-Agent': user_agent})

      def parse(self, response):
         ....

字符串
收到错误

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/scrapy/utils/signal.py", line 30, in send_catch_log
    *arguments, **named)
  File "/usr/lib/python3.6/site-packages/pydispatch/robustapply.py", line 55, in robustApply
    return receiver(*arguments, **named)
  File "/usr/lib/python3.6/site-packages/scrapy/spidermiddlewares/referer.py", line 343, in request_scheduled
    redirected_urls = request.meta.get('redirect_urls', [])
AttributeError: 'Response' object has no attribute 'meta'
Unhandled Error

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/scrapy/commands/crawl.py", line 58, in run
    self.crawler_process.start()
  File "/usr/lib/python3.6/site-packages/scrapy/crawler.py", line 309, in start
    reactor.run(installSignalHandlers=False)  # blocking call
  File "/usr/lib64/python3.6/site-packages/twisted/internet/base.py", line 1283, in run
    self.mainLoop()
  File "/usr/lib64/python3.6/site-packages/twisted/internet/base.py", line 1292, in mainLoop
    self.runUntilCurrent()
--- <exception caught here> ---
  File "/usr/lib64/python3.6/site-packages/twisted/internet/base.py", line 913, in runUntilCurrent
    call.func(*call.args, **call.kw)
  File "/usr/lib/python3.6/site-packages/scrapy/utils/reactor.py", line 41, in __call__
    return self._func(*self._a, **self._kw)
  File "/usr/lib/python3.6/site-packages/scrapy/core/engine.py", line 135, in _next_request
    self.crawl(request, spider)
  File "/usr/lib/python3.6/site-packages/scrapy/core/engine.py", line 210, in crawl
    self.schedule(request, spider)
  File "/usr/lib/python3.6/site-packages/scrapy/core/engine.py", line 216, in schedule
    if not self.slot.scheduler.enqueue_request(request):
  File "/usr/lib/python3.6/site-packages/scrapy/core/scheduler.py", line 91, in enqueue_request
    if not request.dont_filter and self.df.request_seen(request):
builtins.AttributeError: 'Response' object has no attribute 'dont_filter'

型
请告诉我怎么做才对

import cloudscraper import logging from scrapy.http import HtmlResponse class CustomCloudflareMiddleware(object): cloudflare_scraper = cloudscraper.create_scraper() def process_response(self, request, response, spider): request_url = request.url response_status = response.status if response_status not in (403, 503): return response spider.logger.info("Cloudflare detected. Using cloudscraper on URL: %s", request_url) cflare_response = self.cloudflare_scraper.get(request_url) cflare_res_transformed = HtmlResponse(url = request_url, body=cflare_response.text, encoding='utf-8') return cflare_res_transformed

class MyCrawler(CrawlSpider): name = 'mycrawlername' custom_settings = { 'USER_AGENT': '...', 'CLOSESPIDER_PAGECOUNT': 20, 'DOWNLOADER_MIDDLEWARES': { 'middlewares.CustomCloudflareMiddleware.CustomCloudflareMiddleware': 543, } } # my rules... # my parsing functions...

1条答案

按热度按时间

brtdzjyr1#

我已经成功地使用Scrapy downloader middlewares集成了Scrapy和Cloudscraper。
这是我提出的中间件：

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我使用process_response中间件方法。如果我检测到响应是403或503，那么我使用cloudscraper执行相同的请求。否则，我只是继续正常的管道（为了简单起见，也可以删除这个if以始终使用cloudscraper;或者定义更精确的条件来使用或不使用cloudscraper）。此外，由于requests响应与Scrapy不同，我们需要将它们转换为Scrapy响应。
最后，您必须在spider中配置中间件。我喜欢通过定义custom_settings类变量来实现这一点：

型
(the中间件的确切路径将取决于您的项目结构）
你可以找到我完整的例子here。

赞(0）回复(0）举报 12个月前

如何使用cloudscraper与scrapy

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