HTTP proxy solves the problem that IP is collected frequently. It can be said that for HTTP proxy, crawler or crawler collection tool is an indispensable auxiliary tool. How is this HTTP proxy used?
When using Python to write a web crawler program to start crawling data, the first step is to analyze the data modules on the website, and then write a web crawler demo model to analyze the page structure and code structure of the website. We can first simulate the HTTP request to the target site to see what the response data information looks like?
During normal access, you can easily obtain the data in the list and the detailed links to enter the list, and obtain the detailed data package of each enterprise through the links.
When an HTTP request is sent to a site, it usually returns a 200 status, indicating that the request is legally accepted and the returned data is seen, but it also has its own set of anti crawling mechanism algorithm. If you check the same IP to continuously collect the data of its website, it will be listed in the exception blacklist by the IP. When you collect the data of its website, it will be blocked forever. How to solve this problem?
Every request is requested by HTTP proxy, and the HTTP proxy changes randomly. The whole process of each request is different, so this HTTP proxy is used to solve all requests. If you need to use the HTTP proxy or have questions about the use, you can click to enter the Roxlabs website and get a 500MB trial to try.