个别hxs.select工作时空的刮板输出？

Question

mainfile

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

class BloggerxSpider(BaseSpider):
    name = 'bloggerx'
    allowed_domains = ['abcr.com']
    start_urls = ['http://www.abcr.com/profile/07372831905432746031']
    def parse(self,response):
        hxs = HtmlXPathSelector(response)
        item = BloggerxItem()
        item['gender'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Gender")]/following-sibling::node()/text()').extract()
        item['blogger_since'] = hxs.select('/html/body/div[2]/div/div[2]/div/p[2]/text()').re('\d+')
        item['profile_views'] = hxs.select('/html/body/div[2]/div/div[2]/div/p[3]/text()').re('\d+')
        item['industry'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Industry")]/following-sibling::node()/span/a/text()').extract()
        item['occupation'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Occupation")]/following-sibling::node()/span/a/text()').extract()
        item['locality'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="locality"]/a/text()').extract()
        item['region'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="region"]/a/text()').extract()
        item['country'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="country-name"]/a/text()').extract()
        item['introduction'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Introduction")]/following-sibling::node()/text()').extract()
        item['interests'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Interests")]/following-sibling::node()/span/a/text()').extract()
        item['email1'] = hxs.select('//html/body/div[2]/div/div[2]/div/ul/li/script/text()').re('[\w.]+@[\w.]+[com]')
        item['email2'] = hxs.select('/html/body/div[2]/div/div[2]/div/ul/li[3]/div/text()').extract()
        item['website'] = hxs.select('//html/body/div[2]/div/div[2]/div/ul/li[2]/a/@href').extract()
        item['films'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Films")]/following-sibling::node()/span/a/text()').extract()
        item['music'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Music")]/following-sibling::node()/span/a/text()').extract()
        item['books'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Books")]/following-sibling::node()/span/a/text()').extract()
        item['blogs_follow'] = hxs.select('//html/body/div[2]/div/div[3]/ul[2]/li/a/text()').extract()
        item['blogs_follow_link'] = hxs.select('//html/body/div[2]/div/div[3]/ul[2]/li/a/@href').extract()
        item['author_blogs'] =  hxs.select('//html/body/div[2]/div/div[3]/ul/li/span/a/text()').extract()
        item['author_blogs_link'] = hxs.select('//html/body/div[2]/div/div[3]/ul/li/span/a/@href').extract()
        return item

项目文件

from scrapy.item import Item, Field

class BloggerxItem(Item):
    # define the fields for your item here like:
    # name = Field()
    gender = Field()
    blogger_since = Field()
    profile_views = Field()
    industry = Field()
    occupation = Field()
    locality = Field()
    introduction = Field()
    interests = Field()
    email1 = Field()
    website = Field()
    films = Field()
    music = Field()
    books = Field()
    region = Field()
    country = Field()
    email2 = Field()
    blogs_follow = Field()
    blogs_follow_link = Field()
    author_blogs = Field()
    author_blogs_link = Field()
    pass

运行时输出

：scrapy crawl bloggerx -o items.json -t json

2013-03-07 16:39:24+0530 [scrapy] INFO: Scrapy 0.16.4 started (bot: bloggerx)
2013-03-07 16:39:24+0530 [scrapy] DEBUG: Enabled extensions: FeedExporter, LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
2013-03-07 16:39:25+0530 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats
2013-03-07 16:39:25+0530 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2013-03-07 16:39:25+0530 [scrapy] DEBUG: Enabled item pipelines: 
2013-03-07 16:39:25+0530 [bloggerx] INFO: Spider opened
2013-03-07 16:39:25+0530 [bloggerx] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2013-03-07 16:39:25+0530 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6028
2013-03-07 16:39:25+0530 [scrapy] DEBUG: Web service listening on 0.0.0.0:6085
2013-03-07 16:39:27+0530 [bloggerx] DEBUG: Crawled (200) <GET http://www.abcr.com/profile/07372831905432746031> (referer: None)
2013-03-07 16:39:27+0530 [bloggerx] INFO: Closing spider (finished)
2013-03-07 16:39:27+0530 [bloggerx] INFO: Dumping Scrapy stats:
    {'downloader/request_bytes': 249,
     'downloader/request_count': 1,
     'downloader/request_method_count/GET': 1,
     'downloader/response_bytes': 13459,
     'downloader/response_count': 1,
     'downloader/response_status_count/200': 1,
     'finish_reason': 'finished',
     'finish_time': datetime.datetime(2013, 3, 7, 11, 9, 27, 320389),
     'log_count/DEBUG': 7,
     'log_count/INFO': 4,
     'response_received_count': 1,
     'scheduler/dequeued': 1,
     'scheduler/dequeued/memory': 1,
     'scheduler/enqueued': 1,
     'scheduler/enqueued/memory': 1,
     'start_time': datetime.datetime(2013, 3, 7, 11, 9, 25, 967450)}
2013-03-07 16:39:27+0530 [bloggerx] INFO: Spider closed (finished)

生成的输出文件为空，并且在scrapy shell上尝试时单独的hxs.select语句可以正常工作。我有什么蠢事吗？

Answer 1

好像很晚了。但是最近我学会了scrapy，就我的研究而言......

您正在从标题中调用crawl spider并使用基本蜘蛛 错误：

from scrapy.contrib.spiders import CrawlSpider, Rule
class BloggerxSpider(BaseSpider):

更正后：

 from scrapy.contrib.spiders import **CrawlSpider**, Rule

class BloggerxSpider(**CrawlSpider**):

或

from scrapy.spider import BaseSpider

class BloggerxSpider(BaseSpider):

Answer 2

而是def parse_blogger，你需要进行def解析。

def parse是在框架中进行解析的默认解析，如果要将其命名为不同 您需要将您的回复发送给新的回复。

要使用自己的解析方法，您需要调用为回调，这是您创建自己的请求时的示例：

request = Request("http://something", callback=self.parse_blogger)

Answer 3

如果您没有明确定义规则而不关心以下链接，请改用BaseSpider，但要将回调命名为parse。

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from bloggerx.items import BloggerxItem

class BloggerxSpider(BaseSpider):
    ...

请注意，对于CrawlSpiders，您不应将documentation explicitly states命名为回调parse，因为它会覆盖CrawlSpider的parse方法，并且蜘蛛无法正确抓取。

Answer 4

您的日志输出对我来说似乎很奇怪，因为您的start_urls没有条目，服务器响应404，Scrapy默认会忽略，因此不会返回任何项目。你的蜘蛛也没有声明BaseSpider，这意味着这段代码甚至都不会编译，所以看来这里有一些复制/粘贴问题。

EDIT ------------------

我将域名更改为blogger.com，现在它返回一个项目：

2013-03-08 09:02:28-0600 [scrapy] INFO: Scrapy 0.17.0 started (bot: oneoff)
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Overridden settings: {'NEWSPIDER_MODULE': 'oneoff.spiders', 'SPIDER_MODULES': ['oneoff.spiders'], 'USER_AGENT': 'Chromium OneOff 24.0.1312.56 Ubuntu 12.04 (24.0.1312.56-0ubuntu0.12.04.1)', 'BOT_NAME': 'oneoff'}
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Enabled item pipelines:
2013-03-08 09:02:28-0600 [bloggerx] INFO: Spider opened
2013-03-08 09:02:28-0600 [bloggerx] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6024
2013-03-08 09:02:28-0600 [scrapy] DEBUG: Web service listening on 0.0.0.0:6081
2013-03-08 09:02:28-0600 [bloggerx] DEBUG: Crawled (200) <GET http://www.blogger.com/profile/07372831905432746031> (referer: None)
2013-03-08 09:02:28-0600 [bloggerx] DEBUG: Scraped from <200 http://www.blogger.com/profile/07372831905432746031>
    {'author_blogs': [u'Inserire comunicati stampa per il turismo',
                      u'Inserire Comunicati stampa e Article Marketing',
                      u'Video Quacos'],
     'author_blogs_link': [u'http://comunicati-stampa-per-il-turismo.blogspot.com/',
                           u'http://comunicati-stampa-vendita-online.blogspot.com/',
                           u'http://quacos.blogspot.com/'],
     'blogger_since': [u'2008'],
     'blogs_follow': [u'Abandonware Time',
                      u'AltroSeo.com',
                      u'ANSIMA notizie',
                      u'Cinnamon Girl',
                      u'enigmamigarun',
                      u'Fake Books - Libri di una riga.',
                      u'FM - COSMETICA E NON SOLO ',
                      u'GS BARBARIANS',
                      u'Il Disinformatico',
                      u'Linus&#39; blog',
                      u'Montefeltro Nuoto Master',
                      u'Nella Tana del Coniglio',
                      u'PHP and tips'],
     'blogs_follow_link': [u'http://squakenet.blogspot.com/',
                           u'http://www.altroseo.com/',
                           u'http://ansima.blogspot.com/',
                           u'http://cinnamongirl82.blogspot.com/',
                           u'http://enigmaamigarun.blogspot.com/',
                           u'http://fake-books.blogspot.com/',
                           u'http://valeriacosmeticafm.blogspot.com/',
                           u'http://gsbarbarians.blogspot.com/',
                           u'http://attivissimo.blogspot.com/',
                           u'http://torvalds-family.blogspot.com/',
                           u'http://montefeltronuotomaster.blogspot.com/',
                           u'http://anonimoconiglio.blogspot.com/',
                           u'http://phpntips.blogspot.com/'],
     'books': [],
     'country': [],
     'email1': [u'bloggiovanni.cappellini@gmail.com'],
     'email2': [u'cappogio@hotmail.com'],
     'films': [],
     'gender': [],
     'industry': [],
     'interests': [],
     'introduction': [],
     'locality': [],
     'music': [],
     'occupation': [],
     'profile_views': [u'553'],
     'region': [],
     'website': [u'http://www.quacos.com']}
2013-03-08 09:02:28-0600 [bloggerx] INFO: Closing spider (finished)
2013-03-08 09:02:28-0600 [bloggerx] INFO: Dumping Scrapy stats:
    {'downloader/request_bytes': 288,
     'downloader/request_count': 1,
     'downloader/request_method_count/GET': 1,
     'downloader/response_bytes': 13615,
     'downloader/response_count': 1,
     'downloader/response_status_count/200': 1,
     'finish_reason': 'finished',
     'finish_time': datetime.datetime(2013, 3, 8, 15, 2, 28, 948533),
     'item_scraped_count': 1,
     'log_count/DEBUG': 9,
     'log_count/INFO': 4,
     'response_received_count': 1,
     'scheduler/dequeued': 1,
     'scheduler/dequeued/memory': 1,
     'scheduler/enqueued': 1,
     'scheduler/enqueued/memory': 1,
     'start_time': datetime.datetime(2013, 3, 8, 15, 2, 28, 379242)}
2013-03-08 09:02:28-0600 [bloggerx] INFO: Spider closed (finished)

蜘蛛：

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector
from bloggerx.items import BloggerxItem

class BloggerxSpider(BaseSpider):
    name = 'bloggerx'
    allowed_domains = ['blogger.com']
    start_urls = ['http://www.blogger.com/profile/07372831905432746031']

    def parse(self, response):
        hxs = HtmlXPathSelector(response)
        item = BloggerxItem()
        item['gender'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Gender")]/following-sibling::node()/text()').extract()
        item['blogger_since'] = hxs.select('/html/body/div[2]/div/div[2]/div/p[2]/text()').re('\d+')
        item['profile_views'] = hxs.select('/html/body/div[2]/div/div[2]/div/p[3]/text()').re('\d+')
        item['industry'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Industry")]/following-sibling::node()/span/a/text()').extract()
        item['occupation'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Occupation")]/following-sibling::node()/span/a/text()').extract()
        item['locality'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="locality"]/a/text()').extract()
        item['region'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="region"]/a/text()').extract()
        item['country'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Location")]/following-sibling::node()/span[@class="country-name"]/a/text()').extract()
        item['introduction'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Introduction")]/following-sibling::node()/text()').extract()
        item['interests'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Interests")]/following-sibling::node()/span/a/text()').extract()
        item['email1'] = hxs.select('//html/body/div[2]/div/div[2]/div/ul/li/script/text()').re('[\w.]+@[\w.]+[com]')
        item['email2'] = hxs.select('/html/body/div[2]/div/div[2]/div/ul/li[3]/div/text()').extract()
        item['website'] = hxs.select('//html/body/div[2]/div/div[2]/div/ul/li[2]/a/@href').extract()
        item['films'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Films")]/following-sibling::node()/span/a/text()').extract()
        item['music'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Music")]/following-sibling::node()/span/a/text()').extract()
        item['books'] = hxs.select('//html/body/div[2]/div/div[3]/table/tr/th[contains(text(),"Favourite Books")]/following-sibling::node()/span/a/text()').extract()
        item['blogs_follow'] = hxs.select('//html/body/div[2]/div/div[3]/ul[2]/li/a/text()').extract()
        item['blogs_follow_link'] = hxs.select('//html/body/div[2]/div/div[3]/ul[2]/li/a/@href').extract()
        item['author_blogs'] = hxs.select('//html/body/div[2]/div/div[3]/ul/li/span/a/text()').extract()
        item['author_blogs_link'] = hxs.select('//html/body/div[2]/div/div[3]/ul/li/span/a/@href').extract()

        return item