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

This article mainly explains "what are the common anti-crawler methods". Interested friends might as well take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what are the common anti-reptile methods?"

1. Judged by UA: UA is UserAgent and is the identity flag that requires the browser.

UA is the UserAgent, which is the identity of the required browser. The anti-crawler mechanism identifies the crawler by judging that there is no UA in the head of the access request, which is at a very low level and is usually not the only criterion. Anti-crawlers are very simple and can be randomly counted as UA.

2. Judged by Cookie: Cookie refers to the login verification of member account password.

Cookie refers to the password login authentication of a member account, which is judged by distinguishing how often the account crawls in a short period of time. This method of anti-crawler is also very difficult and requires multiple account crawling.

3. Determine by access frequency

Reptiles often visit the target website many times in a short period of time, and the anti-crawler mechanism can determine whether it is a reptile by the frequency of a single IP. This way of anti-climbing is difficult to resist and can only be solved by changing the IP.

4. Judge by CAPTCHA

CAPTCHA is a cost-effective implementation scheme for anti-crawlers. Anti-crawlers usually need to access the OCR CAPTCHA recognition platform, or use TesseractOCR recognition, or use neural networks to train CAPTCHA.

5. Dynamic page loading

The use of dynamically loaded websites is usually to facilitate users to click and view, the crawler can not interact with the page, which greatly increases the difficulty of the crawler.

In general, when users crawl information from a website, they are constrained by "crawlers", which hinders users from obtaining information.

At this point, I believe you have a deeper understanding of "what are the common anti-crawler methods?" 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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