python crawler using proxy: Python crawler project integration proxy IP program

First, why crawlers must be equipped with proxies? This window has to be broken

Brothers engaged in crawling have encountered this situation: scripts run well suddenly on the hiatus, the site returns 403 with a ghost like. To put it bluntly, your local IP was recognized by others, directly off the small black house. This is like using the same cell phone number every day to send text messages to the girl, not to be pulled black only strange.

The proxy IP is yours.face changerThe first thing you need to do is to change your vest every time you request a proxy. Especially for data capture, no proxy is like running naked into the battlefield, and you will be set on fire in minutes. But there are all kinds of proxy services on the market, and a bad choice will slow down the speed.

Secondly, which brushes should I look at when choosing a proxy IP?

Don't listen to the fancy jingles, focus on these three points:

For example, to do e-commerce price comparison, you have to use a dynamic residential IP, every visit is like a real user. If you are doing automated testing, a static IP is more stable. Like ipipgo'sDynamic Residential PackageThe 7 bucks more for 1 G of traffic is thief friendly for individual developers.

Third, the hand to teach you to plug the agent into the Python project

Using the requests library as an example, three lines of code are enough to hook up the proxy:

import requests

proxies = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:端口',
    'https': 'http://用户名:密码@gateway.ipipgo.com:端口'
}
response = requests.get('destination URL', proxies=proxies)

If you're using the Scrapy framework, add these lines to settings.py:

DOWNLOADER_MIDDLEWARES = {
    'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware': 400,
}

IPIPGO_API = "Your extraction link"

Remember to pull the IP pool from ipipgo's API when the crawler launches, theirTK LineLatency can be squeezed down to less than 200ms, which is personally faster than some of the big players.

IV. Guide to avoiding the pit: don't step on these minefields

1. IP pool maintenance:Don't be stupid and use free proxies, 8 out of 10 are bad. It is recommended to update the IP of 20% every hour, like ipipgo's client can change the IP automatically

2. Request frequency control:Even if you use a proxy, don't go wild and set random delays:

import random
time.sleep(random.uniform(1,3)) 

3. Exception handling:Don't be hard on the CAPTCHA, switch IPs in time, wrap the request code with try-except, and switch to the next proxy if the status code is not 200.

V. QA First Aid Kit

Q: What should I do if my proxy IP is slow?
A: Priority is given to local carrier resources, and ipipgo supports filtering by country and city. If it is a cross-border request, using their cross-border line can be as fast as 30%

Q: How do I check if the proxy is in effect?
A: Visit http://httpbin.org/ip to see if the returned IP is a proxy IP. or use the detection tool that comes with the ipipgo client

Q: What can I do if my IP is blocked?
A: Immediately stop the current IP request and change the IP type. If the static residential IP is blocked, contact ipipgo customer service to change the bindings, they respond fast!

Why choose ipipgo?

this oneDynamic Residential PackageI've been renewing for three years, a few points of real experience:

1. Extracting the API is simple and brutal, no need to engage in complex authentication
2. The client comes with traffic statistics, do not worry about overspending at the end of the month
3. Customer service is really online 24 hours a day, last time I asked about TK line configuration at three o'clock in the middle of the night and it was actually answered in seconds.
4. Support socks5 protocol, some special scenarios than http proxy stable

Especially theirStatic Residential IPThe 35 bucks a month can be bound to the server, do long-term monitoring project to save heart. Recently also came out of the hourly billing flexible packages, small teams with no pain.

Lastly, don't just look at the price when choosing a proxy service. Like some cheap packages with offshore data center IP, the recognition rate is super high. ipipgo's residential IP is a local operator resources, the degree of camouflage with real people on the Internet is the same as a hair, which is the core of the anti-blocking.