title: How to store scraped links in Scrapy
body: <p>I did a lot of searches on the web but I couldn't find anything related or maybe it has to do with the wording used.</p>
  <p>Basically, I would like to write a spider that would able to save the scraped links and to check if some other links have been already scraped. Is there any build in function in scrapy to do so?</p>
  <p>Many thanks</p>