Random IP generation algorithm open source implementation

Hands On Random IP Generators

The old iron engaged in crawlers certainly understand that the site anti-climbing mechanism is now more and more chicken thief. Last week a brother told me that he wrote a script to run the run was blocked IP, angry almost smashed the keyboard. At this timeRandomized IP Generation AlgorithmThat's where it comes in - but let's not get ahead of ourselves and write the code, we need to figure out how this is going to work.

Random IPs aren't blind.

Many people think that randomly generated IP is to fill in four random numbers, which is definitely a pit! For example, the beginning of the 192.168 intranet address, or simply does not exist in the address segment, this kind of IP generated out of the waste. The correct approach isRefer to the global public IP segment assigned by IANA, here's an easy comparison chart for you:

Open Source Realization Triple Axe

If you write in Python, you will mainly use these three libraries:

1. sockets do basic calibration
2. random handling of random numbers
3. ipaddress library validation

As a chestnut, generating European IPs can be messed with like this:

import random
def gen_eu_ip(): return f "46.{random.randint(0,255)}.
    return f "46.{random.randint(0,255)}. {random.randint(0,255)}. {random.randint(0,255)}"

It's better to build your own than to use a ready-made one.

Writing your own generator has an Achilles' heel - the generated IP may not even make sense! It's like when you buy a master key and realize you can't poke through half the locks. That's when it's time toProxy services for ipipgoOut of the gate, people have ready-made dynamic IP pools with auto-verification.

Use their API three lines of code to get the available IPs:

import requests
resp = requests.get("https://api.ipipgo.com/getproxy")
print(resp.json()['ip'])

A practical guide to avoiding the pit

Ever had a script suddenly hang up at 3am? Theselesson learned through blood and tearsIt must be memorized:

1. Don't be too regular in the intervals between requests (human operations are subject to small margins of error)
2. Use different IP segments for different operations (A segment for registration, B segment for query)
3. Weekly update of the IP database (ipipgo will automatically update it in the background, which is a great relief).

Frequently Asked Questions QA

Q: How can I test whether the generated IP is valid?
A: Just use the curl command to try the connectivity, or just use ipipgo'sOnline testing tools, much faster than building your own authentication server.

Q: How many IPs are needed to be sufficient?
A: Small projects 500-1000 per day is enough, if you do large-scale collection, it is recommended that ipipgo'sEnterprise PackageIt supports switching 20+ IPs per second.

Q: How to switch quickly when I encounter IP blocking?
A: Add an abnormal retry mechanism in the code, detect the 403 status code will automatically change ipipgo's next IP, pro-test efficiency 98% or more.

Lastly, free proxies are basically unusable nowadays, either they are slow or have a short survival time. I have tested more than a dozen service providers.The response time of ipipgo can be stabilized within 200ms., doing business that requires real-time interaction is not false. Some brothers said that their city-level positioning is quite accurate, so you can try to do geographical restrictions to bypass.