Scrapy 没有从网页中拉取 link，只有网页本身

Question

import scrapy
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule
import protego

class NirsoftSpider(CrawlSpider):
    name = 'sotw'
    allowed_domains = ['www.shadowofthewyrm.org']
    start_urls = ['https://www.shadowofthewyrm.org/downloads.html']

    rules = (
        Rule(LinkExtractor(allow=r'/releases/'),
             callback='parse_item', follow=True),
    )

    def parse_item(self, response):
        file_url = response.css('attr(href)').get()
        file_url = response.urljoin(file_url)
        yield {'file_url': file_url}

抓取输出：

2022-04-08 14:43:47 [scrapy.utils.log] INFO: Scrapy 2.6.1 started (bot: SotW)
2022-04-08 14:43:47 [scrapy.utils.log] INFO: Versions: lxml 4.8.0.0, libxml2 2.9.12, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 22.2.0, Python 3.9.5 (tags/v3.9.5:0a7dcbd, May  3 2021, 17:27:52) [MSC v.1928 64 bit (AMD64)], pyOpenSSL 22.0.0 (OpenSSL 1.1.1n  15
 Mar 2022), cryptography 36.0.2, Platform Windows-10-10.0.19043-SP0
2022-04-08 14:43:47 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'SotW',
 'NEWSPIDER_MODULE': 'SotW.spiders',
 'SPIDER_MODULES': ['SotW.spiders']}
2022-04-08 14:43:47 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor
2022-04-08 14:43:47 [scrapy.extensions.telnet] INFO: Telnet Password: 1a18143a1c486859
2022-04-08 14:43:47 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2022-04-08 14:43:47 [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']
2022-04-08 14:43:47 [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']
2022-04-08 14:43:47 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2022-04-08 14:43:47 [scrapy.core.engine] INFO: Spider opened
2022-04-08 14:43:47 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2022-04-08 14:43:47 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2022-04-08 14:43:47 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://www.shadowofthewyrm.org/downloads.html> (referer: None)
2022-04-08 14:43:47 [scrapy.core.engine] INFO: Closing spider (finished)
2022-04-08 14:43:47 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 292,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 1571,
 'downloader/response_count': 1,
 'downloader/response_status_count/200': 1,
 'elapsed_time_seconds': 0.282146,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2022, 4, 8, 19, 43, 47, 996453),
 'httpcompression/response_bytes': 2629,
 'httpcompression/response_count': 1,
 'log_count/DEBUG': 2,
 'log_count/INFO': 10,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2022, 4, 8, 19, 43, 47, 714307)}
2022-04-08 14:43:47 [scrapy.core.engine] INFO: Spider closed (finished)

具体来说，我想从本网站下载 Windows 下载 link 作为“自动更新”程序的一种方式。下载 link 本身就是 https://www.shadowofthewyrm.org/releases/ShadowOfTheWyrm-Win-1.4.3.zip

基数 url 是 https://www.shadowofthewyrm.org/downloads.html

不知道怎么拉。

尝试删除 LinkExtractor 的“允许”规则以查看 zip 下载是否显示，但仍然没有成功。任何帮助将不胜感激，谢谢。

Answer 1

您的 LinkExtractor 不起作用，因为 href 仅包含 releases/（检查 HTML 源代码）。事实上你不需要遵循这个link（如果你不想下载它）。但下载后你将拥有 response.url:

中的所有内容

def parse_item(self, response):
    yield {'file_url': response.url}

Scrapy 没有从网页中拉取 link，只有网页本身

Scrapy not pulling link from webpage, only the webpage itself

python

scrapy