What are the ways to get the data or pictures of the website?

I would like to ask the gods, what are the ways to get the data or pictures on a website? There is no example reference, I currently understand the method is the web crawler.

Apr.09,2021

you can write a browser plug-in. You can directly use js to get the corresponding tag data


write an oil monkey to get


    .
  1. Web crawler
  2. hack into the database and read directly from the database
  3. cooperate with the website to make the website provide data interface
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