Python proxy IP parsing HTML: Python proxy HTML parsing methods

Proxy IP and HTML parsing thingy

The old iron engaged in crawling should understand, directly with their own IP data gathering is like wearing the same clothes to different shopping malls - sooner or later by the security guards. At this time the proxy IP is equivalent to the dress up magic weapon, especially with ipipgo this kind of professional service provider, can let you play in the data collection of seventy-two changes.

Practical: proxy IP how to plug into Python code

Here is the whole job for the guys, using the requests library to demonstrate how to put a proxy IP on the request header. Be careful to look at the parameter settings and don't let the server tell you what's going on:

import requests

 Here's an example using ipipgo's Socks5 proxy
proxies = {
    'http': 'socks5://user:password@gateway.ipipgo.com:1080',
    'https': 'socks5://user:password@gateway.ipipgo.com:1080'
}

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

Here's the point!timeout settingDon't miss it, some sites are slow to respond, set a 10 seconds just to get stuck in the endurance line of most servers.

Analyzing HTML's Three Biggest Killers

After getting the web source code, these are the three toolkits you use with pleasure:

 BeautifulSoup for Face Party
from bs4 import BeautifulSoup
soup = BeautifulSoup(response.text, 'lxml')

 Performance party use lxml
from lxml import etree
tree = etree.HTML(response.text)

 For lazy people
import re
pattern = re.compile(r'')

It was found empirically that using ipipgo'sStatic Residential IPWith lxml parsing, the speed can be more than 30% faster than normal proxy.

Anti-banning shenanigans

Seen too many newbies fall into these pits:

• IP switching frequency is like a jerk - it is recommended to change the IP every 5-10 requests
• Request headers don't pretend to look like real people - remember to bring Referer and User-Agent!
• Ignoring SSL Certificate Validation - Adding a verify=False Parameter Can Save Your Life

Here's a recommendation for ipipgoDynamic Residential Enterprise EditionIt comes with automatic switching function of IP pool, and it has been tested that it has not been blocked for 8 hours of continuous collection.

Package Selection Guide

Frequently asked questions on demining

Q: What should I do if my proxy IP is not working?
A: 80% of the quality of the IP pool is not, ipipgo TK line has an automatic resurrection mechanism, the dead IP within half an hour to automatically make up for the new one.

Q: What should I do if the parsing speed is slow as a snail?
A: Try their cross-border line, the carrier backbone network, the delay can be pressed to 200ms or less!

Q: HTTPS websites always report certificate errors?
A: In requests.get() add a verify=False parameter, or let ipipgo customer service to give you a special encrypted channel

Finally, a nagging word, with a proxy IP is like wearing clothes, do not always catch the same piece of grip. ipipgo's client comes with intelligent switching, set up a every 5 minutes to change the IP strategy, guaranteed that your crawlers live longer than the king of the eight.