Scrapy returns 0 个项目和 0 个已抓取的页面

Question

我需要帮助。我正在学习抓取并且一直在努力让它抓取网站。

我每次抓取 0 个项目。我已经使用 user_agent 并且还在 settings.py 中设置了 robot_txt = False 但它不起作用。

我注意到当我使用 scrapy shell 时，我得到了所有的细节，并一次又一次地检查我的代码以发现错误，但仍然找不到。请有人帮我检查并告诉我哪里错了。蜘蛛代码：

    import scrapy
    from scrapy.linkextractors import LinkExtractor
    from scrapy.spiders import CrawlSpider, Rule
    from scrapy.loader import ItemLoader
    from  batt_data.items import BattDataItem
    import urllib.parse
    
    class BatterySpider(CrawlSpider):
        name = 'battery' 
        allowed_domains = ['web']
        start_urls = ['https://www.made-in-china.com/multi- 
        search/24v%2Bbattery/F1/1.html']
        base_url = ['https://www.made-in-china.com/multi- 
        search/24v%2Bbattery/F1/1.html']
    
        rules = (
            Rule(LinkExtractor(restrict_xpaths='//*[contains(@class, 
            "nextpage")]'), callback='parse_item', follow=True),
        )
    
        def parse_item(self, response):
            item = BattDataItem()
            item['description'] = response.xpath('//img[@class="J-firstLazyload"]/@alt').extract()
            item['chemistry'] = response.xpath('//li[@class="J-faketitle ellipsis"][1]/span/text()').extract()
            item['applications'] = response.xpath('//li[@class="J-faketitle ellipsis"][2]/span/text()').extract()
            item['shape'] = response.xpath('//li[@class="J-faketitle ellipsis"][4]/span/text()').extract()
            item['discharge_rate'] = response.xpath('//li[@class="J-faketitle ellipsis"][5]/span/text()').extract()
            yield item

日志文件：

C:\Users\Ikeen\batt_data>scrapy crawl battery
    2020-08-29 21:17:27 [scrapy.utils.log] INFO: Scrapy 2.1.0 started (bot: batt_data)
    2020-08-29 21:17:27 [scrapy.utils.log] INFO: Versions: lxml 4.1.0.0, libxml2 2.9.4, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 20.3.0, Python 3.6.3 |Anaconda, Inc.| (default, Oct 15 2017, 03:27:45) [MSC v.1900 64 bit (AMD64)], pyOpenSSL 17.2.0 (OpenSSL 1.0.2l  25 May 2017), cryptography 2.0.3, Platform Windows-10-10.0.18362-SP0
    2020-08-29 21:17:27 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor
    2020-08-29 21:17:27 [scrapy.crawler] INFO: Overridden settings:
    {'BOT_NAME': 'batt_data',
     'NEWSPIDER_MODULE': 'batt_data.spiders',
     'SPIDER_MODULES': ['batt_data.spiders'],
     'USER_AGENT': 'Mozilla/5.0'}
    2020-08-29 21:17:27 [scrapy.extensions.telnet] INFO: Telnet Password: 549b17173b135b6b
    2020-08-29 21:17:27 [scrapy.middleware] INFO: Enabled extensions:
    ['scrapy.extensions.corestats.CoreStats',
     'scrapy.extensions.telnet.TelnetConsole',
     'scrapy.extensions.logstats.LogStats']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled downloader middlewares:
    ['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
     'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
     'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
     'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
     'scrapy.downloadermiddlewares.retry.RetryMiddleware',
     'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
     'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
     'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
     'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
     'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
     'scrapy.downloadermiddlewares.stats.DownloaderStats']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled spider middlewares:
    ['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
     'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
     'scrapy.spidermiddlewares.referer.RefererMiddleware',
     'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
     'scrapy.spidermiddlewares.depth.DepthMiddleware']
    2020-08-29 21:17:28 [scrapy.middleware] INFO: Enabled item pipelines:
    []
    2020-08-29 21:17:28 [scrapy.core.engine] INFO: Spider opened
    2020-08-29 21:17:28 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
    2020-08-29 21:17:28 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
    2020-08-29 21:17:30 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/1.html> (referer: None)
    2020-08-29 21:17:30 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'www.made-in-china.com': <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/2.html;jsessionid=2B77F23449911847145999CD6E9B6429>
    2020-08-29 21:17:30 [scrapy.core.engine] INFO: Closing spider (finished)
    2020-08-29 21:17:30 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
    {'downloader/request_bytes': 234,
     'downloader/request_count': 1,
     'downloader/request_method_count/GET': 1,
     'downloader/response_bytes': 54381,
     'downloader/response_count': 1,
     'downloader/response_status_count/200': 1,
     'elapsed_time_seconds': 2.42789,
     'finish_reason': 'finished',
     'finish_time': datetime.datetime(2020, 8, 29, 20, 17, 30, 804912),
     'log_count/DEBUG': 2,
     'log_count/INFO': 10,
     'offsite/domains': 1,
     'offsite/filtered': 1,
     'request_depth_max': 1,
     'response_received_count': 1,
     'scheduler/dequeued': 1,
     'scheduler/dequeued/memory': 1,
     'scheduler/enqueued': 1,
     'scheduler/enqueued/memory': 1,
     'start_time': datetime.datetime(2020, 8, 29, 20, 17, 28, 377022)}
    2020-08-29 21:17:30 [scrapy.core.engine] INFO: Spider closed (finished)

Answer 1

2020-08-29 21:17:30 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'www.made-in-china.com': <GET https://www.made-in-china.com/multi-search/24v%2Bbattery/F1/2.html;jsessionid=2B77F23449911847145999CD6E9B6429>

您的请求正在被过滤，因为它不属于您定义的允许域。

    allowed_domains = ['web']

使用allowed_domains = ['made-in-china.com']或完全删除它。

Scrapy returns 0 个项目和 0 个已抓取的页面

Scrapy returns 0 items and 0 crawled pages

web-crawler

scrapy

web-scraping