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

This article mainly introduces the HTTP crawler agent how to obtain, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

When crawlers use http proxy crawler data, we often encounter many websites using anti-crawler technology, or the intensity and speed of collecting website information is too large, which puts a lot of pressure on each other's servers. Therefore, you always use the same proxy IP to crawl a web page. Access to this IP is likely to be prohibited, so basically crawler users can not avoid the problem of crawler agent IP, and need a lot of IP resources to achieve the continuous switching of their IP addresses to achieve the purpose of crawling data normally.

At present, it can be said that it is a common need for crawlers to safely avoid anti-crawling programs. Generally, a large number of IP agents are needed to make web crawlers. Because many websites adopt an anti-crawler policy when obtaining website information, it is possible to control the frequency of each IP visit. So when crawling a website, we need a lot of IP agents.

In general, crawler users cannot maintain the server or solve the crawler agent ip problem by themselves. First, the technical threshold is too high, and the second is the cost is too high. It is true that many people will post some free proxy ip online, but for the sake of practicality, stability and security, before you use these proxy ip, many people have already used it, the so-called shared resources, which are banned by some major websites, so when you use these proxy ip resources, you will probably find that they are not available at all. Therefore, there are a large number of proxy servers, which can basically provide proxy ip services.

Thank you for reading this article carefully. I hope the article "how to get HTTP crawler Agent" shared by the editor will be helpful to everyone. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.