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

Novice crawler to prevent IP from being blocked, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

1. Reduce the frequency of visit. Grab one page at a time, take a break for a few seconds, and limit the number of pages you grab each day.

With regard to the time interval of collection, you can first test the maximum access frequency of the target website. The closer to the maximum access frequency, the easier it is to be blocked by IP. It is necessary to set a reasonable time interval, which can not only meet the collection speed, but also is not restricted by IP.

2. Use a highly anonymous agent. To break through the anti-crawler mechanism of the website, you need to use the proxy IP and visit it multiple times by changing the IP.

To use multithreading, you also need a lot of IP and use highly anonymous proxies, otherwise the target site will detect that you are using proxy IP and reveal your real IP, which will definitely block IP. If you use a highly anonymous agent, it is different, and the other party does not notice.

3. Multi-thread acquisition.

Collect data, want to collect more data as soon as possible. Otherwise, a lot of work will be collected one by one, taking time. For example, collect every few seconds, about 10 times per minute, and collect more than 10,000 pages a day. If it is a small website, but how to do tens of millions of pages on a large website, it takes a lot of time to collect at this speed.

It is recommended to collect a large number of data, can use multi-thread, it can synchronously complete multiple tasks, each thread to collect different tasks, to increase the number of collection.

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