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This article mainly shows you "how to use the agent ip in the reptile", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn how to use the agent ip in the reptile "this article.

Scheme 1: each process interface randomly takes the IP list for repeated use, and calls API to get it if it is invalid.

The general logic is as follows:

1. Each process, randomly recycle a part of ip from the interface, and repeatedly try the ip directory to capture data.

2. If the visit is successful, continue to catch the next one.

3. After failure, take IP from the interface and continue to try.

Disadvantages of the scheme: all IP have deadlines, 100 are extracted, and when the 20th is used, the rest may not be available. When setting up a HTTP request, the connection time is more than 3 seconds, and the read time is more than 5 seconds, which may take 3 to 8 seconds, and may be caught hundreds of times in those 3-8 seconds.

Scheme 2: first extract a large number of IP, import it into the local database, and then extract IP from the database.

The general logic is as follows:

1. Create a table in the database, write an import script for API per minute (please consult the agent IP service provider for advice), and import the IP list into the database.

2. Record the import time, IP, port, expiration time, IP availability and other fields in the database

3. Write a crawl script that reads the available IP from the database, and each process fetches an IP usage from the database.

4. When crawling, judging the result, dealing with cookie, etc., whenever there is a CAPTCHA or error, abandon the IP and replace the IP.

Generally speaking, crawler users do not have the ability to maintain their own servers, or to solve the problem of proxy IP on their own, first, because the technical content is too high, second, because the cost is too high, of course, there are many people will put some free proxy IP on the Internet, but from the practical, stability and security considerations, it is not recommended that you use free IP. Since the agent IP published online is not necessarily available, it is likely that you will find that IP is not available or invalid during use. If you need to use ip, you can try Sun http, the preferred IP products of crawler collection, marketing and promotion, studios and other industries. The number of urban lines across the country is unlimited in frequency and concurrency, and the IP pool is updated 24 hours a day.

The above is all the content of the article "how to use Agent ip in Crawlers". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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