Shulou(Shulou.com)06/03 Report--

This article mainly explains "how the web crawler works". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how web crawlers work.

Because it is impossible to determine the total number of pages on the Internet, the web crawler robot starts with a list of known URL and first crawls sites on those URL. When they crawl these pages, they find links to other URL and add those links to the list of pages to be crawled next. Because there are a large number of pages on Internet that can be indexed for search, this process may take place indefinitely.

Web crawlers will follow specific strategies to make them more selective about which pages they should crawl, in what order they should be crawled, and how often they should be crawled to check for content updates. Content on Internet is constantly updated, deleted, or relocated. Web crawlers need to check the page regularly to ensure that the latest information is indexed. Although the behavior of web crawlers of different search engines is slightly different, the ultimate goal is the same, which is to retrieve and index content from web pages.

Nowadays, many websites have anti-crawling mechanisms, so they need to use residential ip to improve crawler efficiency.

At this point, I believe you have a deeper understanding of "how the web crawler works". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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