Web crawlers vs. crawling: a technical solution analysis

Why are crawlers always blocked? You may be missing this magic tool

Crawler friends have encountered this situation: the code is clearly no problem, but running on the tip of the 403 error, or directly by the target site black. At this time do not rush to doubt life, eighty percent of your IP address is recognized by the other side. Just like we go to the supermarket to try to eat, always wear the same clothes to go, the security guards do not stare at you to stare at who?

Naked Crawler vs Proxy Crawler in Action

First look at a real case: an e-commerce platform price monitoring project, with the ordinary crawler continuous collection of 3 hours after the trigger ban, replaced by a proxy IP program after 72 hours of stable operation. The doorway here is actually two points:

 Common Crawler (High Risk Mode)
import requests
for page in range(1,100):
    response = requests.get(f "https://xxx.com/list?page={page}")

 Proxy crawler (safe mode)
import requests
proxies = {
    'http': 'http://ipipgo-rotate:password@gateway.ipipgo.com:8000',
    'https': 'http://ipipgo-rotate:password@gateway.ipipgo.com:8000'
}
for page in range(1,100): response = requests.get(f"{page}, proxies=proxies): response = requests.
    response = requests.get(f "https://xxx.com/list?page={page}", proxies=proxies)

See? That's the key.Proxies parametersipipgo's dynamic proxy service will automatically give you a new vest, each request is like a new clothes to try to eat, the site can not be found to be the same "food".

Three Practical Tips for Proxy IPs

It's not that just any agent will work, there's a lot more to it than that:

Special reminder: don't panic when you encounter a CAPTCHA, ipipgo'sIntelligent Routing FunctionThe ability to automatically switch high success rate IP segments is much more reliable than human trial and error.

A guide to avoiding the pitfalls of the white man

Newbies who are just starting out with proxies often make these mistakes:
1. Use the proxy IP as a family heirloom (it is recommended that a single IP be used for no more than 5 minutes)
2. Ignoring request intervals (even if the IP is changed, 10 clicks in 1 second will reveal it)
3. SSL certificates not processed (https requests require special configuration)

A universal configuration template is given here:

import requests
from random import uniform

proxies = {
    'https': 'http://your_account:token@gateway.ipipgo.com:8000'
}

for url in target_list.
    response = requests.get(
        url, proxies=proxies, proxies=proxies, proxies.get()
        proxies=proxies, verify='ipipgo_ca.pem', officially provided CA certificate
        verify='ipipgo_ca.pem', officially provided CA certificate
        headers={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36...'} ,
        timeout=15
    )
    time.sleep(uniform(1,3)) Random intervals are more natural

question-and-answer session

Q: Can't I use the free agent?
A: It's not that it doesn't work, it's that there are too many pits. We have tested, the average survival time of free agents is less than 7 minutes, and there is a risk of data tampering with 30%. ipipgo's commercial-grade agents come with adata encryptionrespond in singingresponse calibration, suitable for serious projects.

Q: How do I know if the proxy is active?
A: A visit to http://echo.ipipgo.com/, a proprietary detection interface, will return information about the currently used egress IP.

Q: What should I do if I encounter a website asking me to log in?
A: Created in the ipipgo consoleSession-holding agentsThis type of IP maintains the cookie state and is particularly suitable for collection scenarios that require logging in.

Q: What makes your family better than others?
A: Three hard-core advantages: ① Support forSwitch cities on demandThe positioning function ② failed requests automatically retry not deducted ③ 7 × 24 hours technical response, last time I mentioned two o'clock in the middle of the night actually seconds back to the work order!

Let's get real.

Proxy IP this thing, with good is a godsend, with bad is burning machine. It is recommended that newcomers first from ipipgo'spay-per-use packageGetting started, they send 1G of free traffic per day to test, enough to run through the business process. Remember, stable data collection = quality agent + reasonable strategy, you can't have one without the other.