Automated Crawler Tools: Automated Agent Crawler System

Why does this thing have to be a proxy?

搞爬虫的老铁们肯定都遇到过这破事——刚抓几页数据IP就被封了。好比说你去超市买鸡蛋，刚拿两盒就被保安盯上不让进了。这时候代理IP就是你的隐身衣，每次换件衣服进去才安全。

To give a real example: Zhang San, their company to catch e-commerce price data, with their own company's fixed IP connected to catch, the results of the third day of the entire company's network were blacked out. Later changed ipipgo dynamic residential agent, automatic switching more than 300 IP every day, steady grasp of the data for two months did not turn over.

What do you need to build your own proxy crawler?

The whole system is like an intelligent robot that has to be fitted with all these parts:

 Simple proxy rotation example (Python)
import requests
from ipipgo_client import get_proxy Assuming this is the SDK for ipipgo

def crawler(url).
    for _ in range(5): retry 5 times
        proxy = get_proxy(type='dynamic') Get proxy dynamically.
        try.
            res = requests.get(url, proxies={'http': proxy}, timeout=10)
            return res.text
        except.
            continue
    return None

Watch out for these three potholes:

1. The quality of the agent must be stable (don't use a free agent, it's like papier-mâché)
2. Be smart about your switching strategy (don't cut 800 times a minute and get exposed)
3. Exception handling should be thorough (immediately change the IP in case of failure)

A practical guide to avoiding the pit

Seen the most tragic case: a company with their own written proxy pool, the results of 90%IP are invalid. Later changed to use ipipgo API extraction program, with their own health check function, the success rate from 11% directly soared to 98%.

Recently found a tawdry operation: the ipipgo client installed on the Raspberry Pi, set up a timed task at 3:00 a.m. to automatically open the catch, with their TK line, catching foreign data faster than the local.

The most common shit you guys ask about.

Q: What should I do if I use a proxy IP and get stuck?
A：八成是网络类型没选对，做国内业务别选跨境线路。用ipipgo的客户端测速功能，自动筛选低的节点。

Q: How do I know if the proxy is in effect?
A: Add a detection logic in the code, for example, visit http://ip.ipipgo.com/checkip, can return the current IP means effective.

Q: Which package is the best value to buy?
A: novice suggested dynamic residential standard version, 35 dollars can run 4.5G flow, enough to catch 100,000 pieces of commodity data. Business users directly find their sales customization, large quantities can cut prices.

Why do you recommend ipipgo, man?

His family is the most cattle operator resources, such as you want to catch the data of a small country in Southeast Asia, others may be a few IP back and forth to change, ipipgo can get the local real family broadband IP. recently added SERP API interface is more absolute, directly to help you to search engine results parsed into structured data.

Package prices are clearly marked (all units are in RMB):

• Dynamic Residential Standard: 7.67/GB/month (for startup teams)
• Enterprise Edition Dynamic Residential: 9.47/GB/month (with exclusive customer service)
• Static residential IP: 35/each/month (essential for raising a number)

One last piece of cold knowledge: their client can set theIntelligent switching rulesFor example, if you encounter a 403 error, you can automatically change the IP address, which is much more convenient than manual operation. In the business of data collection, if you choose the right tools, you will be able to go home early from work, and this is really not a lie.