Scrapy - Parse_item没有被调用

Question

我有两个主要的问题

1）parse_item方法不会被调用/当“回调=‘self.parse_item’”是爬行页面 2）之后执行包括在规则中，scrapy不会继续遵循链接。相反，它只能跟踪从“启动网址”立即可用的链接。

下面是代码

from scrapy.spider import BaseSpider 
from scrapy.spider import BaseSpider 
from scrapy.selector import HtmlXPathSelector 
from scrapy.contrib.spiders import CrawlSpider, Rule 
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor 
from sheprime.items import SheprimeItem 

class HerroomSpider(CrawlSpider): 
    name = "herroom" 
    allowed_domains = ["herroom.com"] 
    start_urls = [ 
        "http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml", 
"http://www.herroom.com/hosiery.aspx", 


rules = [ 
      Rule(SgmlLinkExtractor(allow=(r'/[A-Za-z0-9\-]+\.shtml',)), callback='self.parse_item') 


    ] 

def parse_item(self, response): 
    print "some message" 

#I have put in this simple parse function, because I just want to get it to work 

感谢您的帮助，

大号

Answer 1

您的代码：

Rule(SgmlLinkExtractor(allow=(r'/[A-Za-z0-9\-]+\.shtml',)), callback='self.parse_item') 

它应该是：

Rule(SgmlLinkExtractor(allow=(r'/[A-Za-z0-9\-]+\.shtml',)), callback='parse_item') 

这个工作对我来说：

from scrapy.contrib.spiders import CrawlSpider, Rule 
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor 

class HerroomSpider(CrawlSpider): 
    name = "herroom" 
    allowed_domains = ["herroom.com"] 
    start_urls = [ 
     "http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml", 
     "http://www.herroom.com/hosiery.aspx" 
    ] 


    rules = [ 
     Rule(SgmlLinkExtractor(allow=(r'/[A-Za-z0-9\-]+\.shtml',)), callback='parse_item') 
    ] 

    def parse_item(self, response): 
     print "some message" 

结果：

[email protected]:~/projects/test$ scrapy crawl herroom 
2012-07-09 08:08:51+0400 [scrapy] INFO: Scrapy 0.15.1 started (bot: domains_scraper) 
2012-07-09 08:08:51+0400 [scrapy] DEBUG: Enabled extensions: LogStats, CloseSpider, CoreStats, SpiderState 
2012-07-09 08:08:51+0400 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats 
2012-07-09 08:08:51+0400 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware 
2012-07-09 08:08:51+0400 [scrapy] DEBUG: Enabled item pipelines: Pipeline 
2012-07-09 08:08:51+0400 [herroom] INFO: Spider opened 
2012-07-09 08:08:51+0400 [herroom] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 
2012-07-09 08:08:52+0400 [herroom] DEBUG: Crawled (200) <GET http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml> (referer: None) 
2012-07-09 08:08:54+0400 [herroom] DEBUG: Crawled (200) <GET http://www.herroom.com/hosiery.aspx> (referer: None) 
2012-07-09 08:08:55+0400 [herroom] DEBUG: Crawled (200) <GET http://www.herroom.com/simone-perele.shtml> (referer: http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml) 
some message 
2012-07-09 08:08:56+0400 [herroom] DEBUG: Crawled (200) <GET http://www.herroom.com/simone-perele-12p300-trocadero-strapless-bra.shtml> (referer: http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml) 
some message 
2012-07-09 08:08:57+0400 [herroom] DEBUG: Crawled (200) <GET http://www.herroom.com/simone-perele-12p342-trocadero-push-up-bra-with-racerback.shtml> (referer: http://www.herroom.com/simone-perele-12p314-trocadero-sheer-seamless-racerback-bra.shtml) 
some message