代码来自《Learning Scrapy》，还在学习当中，这段代码基本是抄的，想运行一下，看看效果，无奈没有达到书中所描述的效果，就是并没有跳转到下一页进行爬虫，帮忙看一下. 代码： {代码...} 上面的爬虫地址是doc...

Try exchanging the order of the two rules

python - scrapy crawl 为什么无法跳转到下一个链接？

代码来自《Learning Scrapy》，还在学习当中，这段代码基本是抄的，想运行一下，看看效果，无奈没有达到书中所描述的效果，就是并没有跳转到下一页进行爬虫，帮忙看一下.
代码：

<code>import datetime
import urlparse
import socket
 
from scrapy.loader.processors import MapCompose, Join
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule
from scrapy.loader import ItemLoader
 
from ..items import PropertiesItem
 
 
class EasySpider(CrawlSpider):
    name = 'easy'
    allowed_domains = ['http://192.168.99.100:32768/']
    start_urls = ['http://192.168.99.100:32768/properties/index_00000.html',]
 
    # Rules for horizontal and vertical crawling
    rules = (
        Rule(LinkExtractor(restrict_xpaths='//*[contains(@class,"next")]')),
        Rule(LinkExtractor(restrict_xpaths='//*[@itemprop="url"]'),
             callback='parse_item')
    )
 
    def parse_item(self, response):
        """ This function parses a property page.
 
        @url http://192.168.99.100:32768/properties/property_000000.html
        @returns items 1
        @scrapes title price description address image_urls
        @scrapes url project spider server date
        """
 
        # Create the loader using the response
        l = ItemLoader(item=PropertiesItem(), response=response)
 
        # Load fields using XPath expressions
        l.add_xpath('title', '//*[@itemprop="name"][1]/text()',
                    MapCompose(unicode.strip, unicode.title))
        l.add_xpath('price', './/*[@itemprop="price"][1]/text()',
                    MapCompose(lambda i: i.replace(',', ''), float),
                    re='[,.0-9]+')
        l.add_xpath('description', '//*[@itemprop="description"][1]/text()',
                    MapCompose(unicode.strip), Join())
        l.add_xpath('address',
                    '//*[@itemtype="http://schema.org/Place"][1]/text()',
                    MapCompose(unicode.strip))
        l.add_xpath('image_urls', '//*[@itemprop="image"][1]/@src',
                    MapCompose(lambda i: urlparse.urljoin(response.url, i)))
 
        # Housekeeping fields
        l.add_value('url', response.url)
        l.add_value('project', self.settings.get('BOT_NAME'))
        l.add_value('spider', self.name)
        l.add_value('server', socket.gethostname())
        l.add_value('date', datetime.datetime.now())
 
        return l.load_item()
</code>

上面的爬虫地址是docker中的
网页源代码为：

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<code class="HTML">
 
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Scrapy Book Tutorial Example</title>
<style type="text/css">
a {text-decoration:none;}
.listing-description { font-size: 7px; display:block; }
</style>
</head>
<body>
<h1>Page 4</h1>
<ul>
 
<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
  <a class="listing-link" itemprop="url" href="property_000120.html">
  <img itemprop="image" src="../images/i01.jpg" width="15" height="15" alt="thumb" />
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  <span itemprop="price">£881.0pw</span>
  location: <span itemscope itemtype="http://schema.org/Place">
  <span>Wimbledon, London</span></span>
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but buses croydon heating square stoke floors maisonette local</span>
  </a>
</li>
 
<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
  <a class="listing-link" itemprop="url" href="property_000121.html">
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  <span class="listing-title" itemprop="name">european station area royal food</span>, price:
  <span itemprop="price">£1151.0pw</span>
  location: <span itemscope itemtype="http://schema.org/Place">
  <span>Battersea, London</span></span>
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  </a>
</li>
 
<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
  <a class="listing-link" itemprop="url" href="property_000122.html">
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  <span class="listing-title" itemprop="name">ontario maintained rm bbc modern</span>, price:
  <span itemprop="price">£1026.0pw</span>
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  </a>
</li>
 
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  <a class="listing-link" itemprop="url" href="property_000123.html">
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  <span class="listing-title" itemprop="name">jacuzzi marble newbury also wanted</span>, price:
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</li>
 
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  <a class="listing-link" itemprop="url" href="property_000124.html">
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</li>
 
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  <a class="listing-link" itemprop="url" href="property_000127.html">
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  <span class="listing-title" itemprop="name">immaculate edgware guy twin warehouse angel views georgian</span>, price:
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  <span class="listing-title" itemprop="name">hotel ec first notting</span>, price:
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  <span>Camden Town, London</span></span>
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  <span class="listing-title" itemprop="name">tulse n mews summer</span>, price:
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  location: <span itemscope itemtype="http://schema.org/Place">
  <span>Camden, London</span></span>
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<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
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  <span class="listing-title" itemprop="name">rise furn promotion heating</span>, price:
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  location: <span itemscope itemtype="http://schema.org/Place">
  <span>Shoreditch, London</span></span>
  <span class="listing-description" itemprop="description">home who miles
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  </a>
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  <img itemprop="image" src="../images/i08.jpg" width="15" height="15" alt="thumb" />
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  <span>Croydon, London</span></span>
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<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
  <a class="listing-link" itemprop="url" href="property_000147.html">
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  <span class="listing-title" itemprop="name">waterloo condition knightsbridge rentals</span>, price:
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  location: <span itemscope itemtype="http://schema.org/Place">
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  <span class="listing-description" itemprop="description">current free nd professional
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<li class="listing-maxi" itemscope itemtype="http://schema.org/Product">
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  <span class="listing-title" itemprop="name">university mile contract room</span>, price:
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  <a class="listing-link" itemprop="url" href="property_000149.html">
  <img itemprop="image" src="../images/i00.jpg" width="15" height="15" alt="thumb" />
  <span class="listing-title" itemprop="name">accommodation st russell vale</span>, price:
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  location: <span itemscope itemtype="http://schema.org/Place">
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ringa_lee2899 days ago870

python - scrapy crawl 为什么无法跳转到下一个链接？

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