How to set up a dynamic ip pool for use by crawlers

This article introduces how to establish a dynamic ip pool for crawlers to use, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Many industries also need dynamic ip, such as search engine optimization, crawler collection, network marketing, finance and so on.

When we set up the IP proxy, we need to obtain high-quality IP resources. If we have a lot of ip resources, we can break the limit on the number of times and make the crawler work more efficiently. Dynamic agent IP is the best tool to break through the limit of times and improve the efficiency of crawlers.

Description

1. Climb the free ip.

2. Most of the IP of BeautifulSoup is useless. The next step is whether requests is useful or not.

3. Useful ip is stored in the database so that we can use it at any time (redis)

4. It takes time (or a period of time) to test whether ip in the database is useful or useless. Because the ip that is already stored in the database must have a timeliness, it will be gone after time.

5. Implement an interface so that other programs can call the stored ip smoothly.

Example

# coding:utf-8 # this is the storage of the agent Store the crawled agent in the database from ProxyFile.config import * class Redis_Operation: def put_head (self,ip): # here the useful IP address is stored in redis R.lpush ('IP_list' Ip) def get_head (self): # here take an IP return R.lpop ('IP_list') def get_tail (self) from the beginning of the list: # here take an IP from the end of the list to check return R.rpop (' IP_list') def list_len (self): # return the length of the list Return R.llen ('IP_list') RO=Redis_Operation () # create an instance Other files will export this example, ah, on how to establish a dynamic ip pool for crawlers to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.