scrapy.Request cannot enter callback
code is as follows:
def isIdentifyingCode(self, response):
""""""
-sharp
pass
def get_identifying_code(self, headers):
-sharp
-sharp
return scrapy.Request(
url="https://www.zhihu.com/api/v3/oauth/captcha?lang=en",
headers=header,
callback=self.isIdentifyingCode,
dont_filter=True)when scrapy crawls a picture of a web page, the class that inherits ImagesPipelines is customized in the pipelines file. but the custom pipelines cannot be executed after running the program. Item cannot pass the following is a custom pipelines clas...
when I crawl a page with scrapy, I find that I can only request one page at a time, but the posts on the official website and Baidu say that the concurrency can be controlled through CONCURRENT_REQUESTS , but I tried it or it didn t work? CONCURRENT_...
I use CrawlSpider combined with the following Rules to automatically turn the page and climb the movie information of Douban top250: rules = ( Rule(LinkExtractor(restrict_xpaths= span[@class="next"] a ), callback= parse_...
as shown in the figure below, when the page is the food section of the whole city, for example, the URL of Xi an food is "http: www.dianping.com xian ch10 ", you can crawl the data normally (figure 1). 50 "http: www.dianping.com xian ... " Please ...
uses the scrapy.Request method to collect pages, but nothing is done. import scrapy def ret(response): print( start print ) print(response.body) url = https: doc.scrapy.org en latest intro tutorial.html v = scrapy.http.Request(url=url,...
when crawling Google Maps data using scrapy, the url accessed is http: kh.google.com flatfile., where the question mark is a parameter, and the following 403 errors will occur randomly: . the same url, may be downloaded normally after another try, ...