Python crawler development: Python proxy crawler practice tutorials

Hands-on with Python proxy crawler to avoid anti-crawl mechanism

Crawler iron should have experienced the despair of being blocked IP, yesterday just wrote a good crawler today by the site ban. At this time the need for proxy IP to save the day, today we will nag how to use Python + proxy IP to create a crawler system is not bad.

Practical combat essential: proxy IP basic configuration

Let's start by straightening out the three basic positions of a proxy IP:

import requests

 Normal Proxy Mode
proxies = {
    'http': 'http://username:password@ip:port',
    'https': 'http://username:password@ip:port'
}

 Randomized IP pool mode
ip_pool = [
    'http://ip1:port',
    'http://ip2:port'
]

 Use ipipgo's API to get a dynamic IP (highly recommended)
import ipipgo
client = ipipgo.Client(api_key='your key')
current_ip = client.get_proxy()

Knockout:It is recommended to directly interface with the API interface of ipipgo, their dynamic residential IP pool update frequency is fast, tested the e-commerce platform for 12 consecutive hours of capture without being ban.

Anti Anti Climbing Triple Axe Combat Technique

It's not enough to have an agent, you have to go along with these tawdry operations:

To give a real case: with ipipgo's static residential IP with random delay, successfully broke through the price monitoring protection of a travel platform, continuous collection of 3 days without pressure.

ipipgo package selection guide

Right-sized according to business needs:

 Dynamic Residential (Standard Edition) Scenarios
If you need high anonymity and affordability.
    Choose the $7.67/GB package

 Dynamic Residential (Enterprise Edition)
elif Need API high concurrency support.
    Go to $9.47/GB Enterprise Package

 Scenarios for Static Residential
elif Need long-term fixed IP: $35/IP closed-eye entry
    $35/IP closed eyes into

Their TK line can control the latency within 200ms in Southeast Asian e-commerce data capture scenarios, which is at least 3 times faster than ordinary lines.

Frequently Asked Questions First Aid Kit

Q: What should I do if my proxy IP always fails?
A: Check the IP pool update mechanism, recommend using ipipgo's real-time API to get the latest IP, their IP survival cycle can basically last 4-6 hours.

Q: Still being recognized after using a proxy?
A: eighty percent of the cookie leaks the real IP, remember to cooperate with requests.

Q: Is the agent too slow to affect efficiency?
A: change ipipgo's cross-border line, the measured download speed can reach 5MB/s, faster than the ordinary proxy more than 8 times!

Cost Control Tips

Share a money-saving trick: use ipipgo's dynamic package, add a traffic statistics module in the code, below the threshold automatically switch IP, so you can save at least 30% traffic costs.

class TrafficMonitor.
    def __init__(self, limit=500).
        self.used = 0
        self.limit = limit in MB

    def check(self): if self.used > self.limit: if self.used = 0
        if self.used > self.limit: self._refresh_ip()
            self._refresh_ip()
            self.used = 0

    def _refresh_ip(self): if self.used > self.limit: self._refresh_ip(): self.used = 0
         Call ipipgo's IP replacement interface
        new_ip = client.rotate_ip()

Finally, to tell the truth, instead of tossing free agents, it is better to spend a little money to use ipipgo's professional services. They have that 1v1 customized program is really fragrant, last time there is a financial data collection project, customized a hybrid agent program, the cost directly cut in half.