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出于某种原因，我的爬虫只爬了几个域。它至少应该遵循起始页上的所有 url。此外，这在 craigslist 上，我不确定它们是否以阻止爬虫而闻名。知道发生了什么吗？

这是输出：

2012-07-01 15:02:56-0400 [craigslist] INFO: Spider opened
2012-07-01 15:02:56-0400 [craigslist] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2012-07-01 15:02:56-0400 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6026
2012-07-01 15:02:56-0400 [scrapy] DEBUG: Web service listening on 0.0.0.0:6083
2012-07-01 15:02:57-0400 [craigslist] DEBUG: Crawled (200) <GET http://boston.craigslist.org/search/fua?query=chest+of+drawers> (referer: None)
2012-07-01 15:02:57-0400 [craigslist] DEBUG: Crawled (200) <GET http://boston.craigslist.org/fua/> (referer: None)
2012-07-01 15:02:57-0400 [craigslist] DEBUG: Filtered offsite request to 'boston.craigslist.org': <GET http://boston.craigslist.org/sob/fud/3112540401.html>
2012-07-01 15:02:57-0400 [craigslist] INFO: Closing spider (finished)

这是代码：

from scrapy.selector import HtmlXPathSelector
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.contrib.spiders import CrawlSpider, Rule
from craigslist.items import CraigslistItem

from scrapy.http import Request

class BostonCragistlistSpider(CrawlSpider):
    name = 'craigslist'
    allowed_domains = ['http://boston.craigslist.org']
    start_urls = ['http://boston.craigslist.org/search/fua?query=chest+of+drawers']

    rules = (
        Rule(SgmlLinkExtractor(allow=r'\/[a-z]{3}\/[a-z]{3}\/.*\.html'), callback='get_image', follow=True),
        # looking for domains like:
        # http://boston.craigslist.org/sob/fud/3111565340.html
        # http://boston.craigslist.org/gbs/fuo/3112103005.html
        Rule(SgmlLinkExtractor(allow=r'\/search\/fua\?query=\.*'), callback='extract_links', follow=True),
    )

    def extract_links(self, response):
        print 'extracting links'
        links = hxs.select('//p[@class="row"]//a/@href').extract()
        for link in links:
            return Request(link, callback=self.get_image)

    def get_image(self, response):
        print 'parsing'
        hxs = HtmlXPathSelector(response)
        images = hxs.select('//img//@src').extract()

任何想法将不胜感激！

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1 回答 1

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allowed_domains 需要包含域名，而不是 URL。将其更改为：

allowed_domains = ['boston.craigslist.org']

您可以从日志中看到请求已被场外中间件（删除 allowed_domains 之外的 URL 的组件）过滤：

15:02:57-0400 [craigslist] DEBUG: Filtered offsite request to 'boston.craigslist.org': http://boston.craigslist.org/sob/fud/3112540401.html>
于 2012-07-03T01:11:15.127 回答