D4Vinci/Scrapling v0.4.8

Release v0.4.8

on GitHub

A big spider update that takes the crawling framework to the next level 🕷️

🚀 New Stuff and quality of life changes

• Added a LinkExtractor primitive in scrapling.spiders.LinkExtractor to pull URLs out of a Response. There are a lot of controls (Check the docs)

  from scrapling.spiders import LinkExtractor
  
  extractor = LinkExtractor(allow=r"/posts/", deny_domains=["ads.example.com"])

• Added CrawlSpider and CrawlRule generic spider templates so you no longer have to hand-write the same "follow links matching this pattern" boilerplate. Override rules() to return a list of CrawlRule objects, each pairing a LinkExtractor. (Check the docs)

  from scrapling.spiders import CrawlSpider, CrawlRule, LinkExtractor
  
  class QuotesSpider(CrawlSpider):
      name = "blog"
      start_urls = ["https://quotes.toscrape.com/"]
  
      def rules(self):
          return [
              CrawlRule(LinkExtractor(allow=r"/author/"), callback=self.parse_author),
              CrawlRule(LinkExtractor(allow=r"/page/\d+/")),  # pagination, no callback
          ]
  
      async def parse_author(self, response):
          yield {
              "name": response.css(".author-title::text").get(),
              "birthday": response.css(".author-born-date::text").get(),
              "url": response.url,
          }

• Added a SitemapSpider template that seeds a crawl directly from a sitemap, or robots.txt URLs. Handles gzip-compressed sitemaps, and a lot of controls and options. URLs are dispatched via the crawl rules as shown above for CrawlSpider. (Check the docs)

  from scrapling.spiders import SitemapSpider, CrawlRule, LinkExtractor
  
  class NewsSitemap(SitemapSpider):
      name = "news"
      sitemap_urls = ["https://example.com/robots.txt"]
  
      def rules(self):
          return [
              CrawlRule(LinkExtractor(allow=r"/articles/"), callback=self.parse_article),
          ]
  
      async def parse_article(self, response):
          yield {"url": response.url, "title": response.css("h1::text").get()}

• Adaptive relocation now defaults to a 40% similarity threshold instead of 0 across all methods. This will make the adaptive feature work better. When nothing crosses the threshold, a warning now tells you the top score it did see, so you can lower percentage deliberately if needed.

• Updated all browsers and fingerprints. Run a new scrapling install --force after updating to refresh the browsers and fingerprints.

🐛 Bug Fixes

• Fixed Fetcher.configure(...) not applying to per-request calls. Same fix applied to AsyncFetcher.
• Fixed incorrect request fingerprinting that caused duplicate requests in spiders by @yetval in #255.
• Fixed the Adaptive scraping engine staying silent on weak matches. Combined with the threshold change above, you now get a warning instead of a misleading "best guess" element when relocation fails.

Docs

• Refreshed older code examples across the documentation to match the current version.
• Improved the code copy-paste experience on the docs site and trimmed the agent skill so it uses fewer tokens per invocation.

🙏 Special thanks to the community for all the continuous testing and feedback

Big shoutout to our Platinum Sponsors