问题 I have a Website URL Like www.example.com I want to collect social information from this website like : facebook url (facebook.com/example ), twitter url ( twitter.com/example ) etc., if available anywhere, at any page of website. How to complete this task, suggest any tutorials, blogs, technologies .. 回答1: Since you don't know exactly where (on which page of the website) those link are located, you probably want to base you spider on CrawlSpider class. Such spider lets you define rules for