socks5 crawler proxy: Python crawler project dedicated socks5 proxy API interface

Hands-on with socks5 proxy to keep crawlers alive longer

Crawler brothers understand that the biggest headache is IP blocked. Yesterday just run through the script, today may be a break. At this time socks5 proxy is especially like to the crawler put on the invisible clothes, especially like ipipgo this kind of coverage of the global residential IP service, can make your request looks like a real person operation.

To give a real case: there is a team of e-commerce price comparison, before the use of ordinary proxy two or three days to change the IP pool. Later, it changed to ipipgo's socks5 dynamic residential IP, the success rate of request directly soared to 93%. why so top? Because people more than 90 million home network IP random switching, the target site simply can not feel the law.

What's the difference between socks5 and regular proxies

Many people can't tell the difference between http proxy and socks5. Simply put, the http proxy is like a courier that can only take small roads, while the socks5 proxy is able to fly an airplane to send express all-rounders. Support for TCP/UDP various protocols, even DNS resolution can be proxy, which needs to deal with complex requests for crawlers is open.

How to play with socks5 proxies in Python

Taking the requests library as an example, you can access it without changing too much code. Here's a little trick:Remember to set up a timeout retry mechanismAfter all, the network environment is complex. It is recommended to use the API provided by ipipgo to dynamically obtain a proxy, so that each request can automatically change the IP.

import requests

proxies = {
    'http': 'socks5://user:pass@gateway.ipipgo.com:1080',
    'https': 'socks5://user:pass@gateway.ipipgo.com:1080'
}

resp = requests.get('destination URL', proxies=proxies, timeout=10)

Note! If you use scrapy framework, you have to configure socks5 middleware in middleware. One pitfall is that some older versions of the library will report protocol errors, so you can try using therequests[socks]This expansion pack.

Avoid these potholes and take the easy way out

1. IP purity is killing me.: Don't use those used up server room IPs, go with a provider like ipipgo that has a large pool of residential IPs. Their IPs are real home broadband and not easily blacklisted.

2. Don't get too wild with concurrency control：就算用代理也别开太多线程，建议控制在每秒5-10个请求。可以配合随机，模仿真人操作节奏。

3. Remember to handle exceptionsThe 403/429 status code is used to switch IPs automatically. ipipgo's API returns available proxies in real time, which is very stable with the retry mechanism.

interactive question-and-answer session

Q: What should I do if my agent is slow?
A：检查三点：①选离目标服务器近的节点 ②测试单个代理的 ③确认是不是自己代码的问题。ipipgo的代理都带测速功能，可以筛选低的IP。

Q: How do I verify if the agent is in effect?
A: Direct accesshttp://ip.ipipgo.com/checkip, this interface returns the currently used egress IP and location information.

Q: What should I do if I encounter a certificate error?
A: 80% is the certificate problem of socks5 proxy. It is recommended to addverify=FalseTemporarily skip authentication, but production environments still need to be configured with CA certificates.

The last word of caution, do crawlers like guerrilla warfare, you have to learn to hide their whereabouts. Use a good socks5 proxy equivalent to the crawler with camouflage clothing, especially like ipipgo such a resourceful service provider, you can make your data collection twice as much with half the effort. At first, you may find the configuration troublesome, but after figuring out the real flavor, at least you don't have to toss every day to change the IP.