Simple Web Crawling Tool: Simple Proxy Crawler Development Guide

Hands-on web crawling tool that doesn't block your account

Engage in the crawler is the most headache is the site blocked IP, yesterday also ran a good script today suddenly stopped. At this time you have to use the proxy IP this magic weapon, just like playing the game open a small number, a number is blocked immediately change the new number and then play.

Let's write the simplest example in Python:

import requests
from itertools import cycle

 Here is the link to the API provided by ipipgo.
proxy_api = "https://api.ipipgo.com/get?type=dynamic&count=5"

def get_proxies():
    resp = requests.get(proxy_api)
    return [f"{p['ip']}:{p['port']}" for p in resp.json()['data']]

proxy_pool = cycle(get_proxies())

url = "https://target-site.com/data"
for _ in range(10).
    proxy = next(proxy_pool)
    try.
        resp = requests.get(url, proxies={"http": proxy, "https": proxy})
        print(resp.text[:100]) Print the first 100 characters of validation.
    print(resp.text[:100])
        print(f"{proxy} hung, switch to the next one now!")

There are just three things at the core of this script:Automatic acquisition of IP pools,Recurring Proxies,Abnormal automatic switching. Extracting dynamic residential IPs with ipipgo's API, switching randomly per request, is more than ten times more durable than a single IP.

Choose the right type of agent to get twice the result with half the effort

There are various types of proxy IPs on the market, so let's use the table to compare three common types:

Delineate the focus:Choose Dynamic Standard for small amount of data(math.) genusUse a static IP for long term hangups(math.) genusEnterprise applications go straight to customized solutionsI'm not sure if I've ever had a problem with that. The last time I helped a client with a price comparison system, I used a dynamic enterprise IP and it ran for a month straight without being blocked.

Guide to avoiding pitfalls: five common mistakes made by novices

1. Forgetting to set a timeout: Some proxies are slow to respond, and without the timeout parameter, the whole script will get stuck!

 Correct posture
requests.get(url, proxies=proxy, timeout=(3, 7))

2. IP pool not updated: It is recommended that the IP pool be refreshed every 2 hours, especially for dynamic residential IPs

3. User-Agent does not switch: Replacement of request header with proxy IP, realism +50%

4. Ignore HTTPS certificate validation: Some agents require authentication to be turned off, but this reduces security

5. No IP quality testing.: ping the extracted IPs first to eliminate the failed nodes

Practical case: capture e-commerce price data

As an example, an e-commerce platform has their anti-crawl strategy:

• Banning a single IP for more than 20 requests per minute
• Non-usable browser features detected and blocked directly
• AJAX dynamic loading data

Our crack program:

from fake_useragent import UserAgent

ua = UserAgent()
headers = {
    'User-Agent': ua.random, 'Accept-Language': 'en-US,en;q=0.9'
    'Accept-Language': 'en-US,en;q=0.9'
}

def stealth_crawl(url).
    proxy = get_proxy() get new IP from ipipgo
    try.
        resp = requests.get(url,
                          headers=headers, proxies={"https
                          proxies={"https": proxy},
                          timeout=5)
        if "CAPTCHA" in resp.text: print("Trigger validation!
            print("Authentication triggered! Switching IPs now")
            refresh_proxies()
        return parse_data(resp.json())
    except Exception as e: log_error(e)
        log_error(e)
        return None

The core of this program isDynamic UA + Proxy IP + Anomaly DetectionTrinity. The actual test with ipipgo's static residential IP, continuous collection for 3 days did not trigger the verification mechanism.

Frequently Asked Questions

Q: What should I do if the proxy IP is invalid after using it?
A: ipipgo's is recommendedDynamic Residential (Enterprise Edition)Package with its own IP survival detection function and automatic replacement when it fails.

Q: What if I need to run multiple crawlers at the same time?
A: Use theirAPI Concurrent Extractionfunction, remember to set different session IDs to avoid IP duplication.

Q: How to break the anti-climbing mechanism which is particularly strict?
A: Contact ipipgo technical support for customizationTK line agentThis IP pool has been specially processed to have a pass rate of up to 98%.

Q: How can I tell if I should use a per-measurement or monthly subscription?
A: It's more cost-effective to have a direct monthly subscription with an average daily data volume of 10GB. Their customer service can give doUsage assessment reportThis service is free of charge.

Why do you recommend ipipgo?

After using seven or eight proxy service providers, I finally locked ipipgo for three reasons.IP purityhigh, unlike some service providers who sell blacklisted IPs as new; and two.fast response time, work orders must be responded to within 10 minutes; iii.Package Flexibility, last month we did short term projects and were able to apply for weekly payments.

Especially theirSERP Specialized Agents, doubling the success rate directly when doing search engine crawls. Recently the newtraffic sharingThe functionality is also quite useful for teams to share IP pools with multiple people without fighting.

Finally give a piece of advice: do not buy cheap junk agent, was blocked loss is greater. Regular service providers haveFree Trial, test before ordering. For example, ipipgo's newbie experience package is enough to run through the entire development process.