URL collection tool: proxy IP rotation collection of efficient program tutorials

First, why is your crawler always pulled by the site?

Engaged in data collection of the old iron understand, the most headache is just half of the IP is sealed. The site is now very fine, the same IP continuous access immediately triggered wind control, light speed limit heavy seal. At this timeProxy IP RotationIt's the saving grace - like going out in different clothes every day so that the website doesn't recognize who you are.

To cite a real case: an e-commerce company with its own server IP collection of competing prices, the results of three days on the blocking of the IP, changed to ipipgo's dynamic residential agent after theAverage daily collection skyrocketed from 50,000 to 800,000 items. That's the magic of agent rotation, and here's a handful of practical tips.

Second, choose the right type of agent = half success

There are various types of agents in the market, and choosing the wrong type is equal to spending money for nothing. According to our experience of serving 300+ enterprises, we recommend this choice:

Dynamic Residential (Standard): suitable for small and medium-sized collection, 7.67 yuan / GB price is really fragrant, each request automatically change the IP
Static Residential AgentsScenarios where the session state needs to be maintained (e.g., post-login capture) are a good deal at $35/IP per month
Enterprise Edition Dynamic Residential: A must for millions of data, $9.47/GB with request prioritization!

The focus here is on the ipipgoTK line agentThe TK specializes in anti-climbing mechanisms for e-commerce platforms. Before a customer pick Amazon product information, ordinary agent success rate is only 30%, change into TK line directly pull to 92%.

III. 5 Steps to Build an Agent Rotation System

As an example, Python uses the ipipgo API to implement smart rotation:

import requests
from itertools import cycle

 Get a pool of proxies from ipipgo
def get_proxies():
    api_url = "https://api.ipipgo.com/get?format=json&key=你的密钥"
    res = requests.get(api_url).json()
    return cycle(res['proxies']) cycle through proxies

proxy_pool = get_proxies()

 Automatically switch when collecting
def crawl(url).
    for _ in range(3): fail retry 3 times
        proxy = next(proxy_pool)
        try: resp = requests.get(url, proxies={"http")
            resp = requests.get(url, proxies={"http": proxy, "https": proxy}, timeout=10)
            return resp.text
        except.
            continue
    return None

Key Tip:
1. Do not set the timeout time more than 10 seconds, otherwise it will affect efficiency
2. Cycle the proxy pool with the cycle function to avoid reusing it.
3. With a random User-Agent is more effective (the space is limited here will not be expanded)

Fourth, avoid the pit guide: 90% novice will make mistakes

Pit 1: Poor agent quality
A customer used a free proxy for cheap, and the result was that 50% requests failed. It is recommended to at least choose a free proxy like ipipgo.Carrier-grade resourcesof the service provider, with a measured availability of 98%+.

Pit 2: Unreasonable switching frequency
Collecting such anti-climbing strict station as Zhihu, it is recommended to change IP every 5-10 requests; collecting ordinary news station can be changed 20-30 times. ipipgo clients haveAutomatic switching threshold setting, without having to write your own logic.

Pit 3: Ignoring Location
Remember to choose a domestic websitecontinental nodeThe overseas website is recommended to use ipipgo's cross-border special line. Before a buddy pick Japanese Rakuten but use the U.S. agent, the results triggered a secondary verification.

V. Frequently Asked Questions QA

Q: What should I do if my agent suddenly fails?
A: Add an exception retry mechanism in the code, and at the same time, it is recommended to open ipipgo'sReal-time monitoring servicesThe IP is automatically excluded from the list of invalid IPs.

Q: Do I need to maintain my own agent pool?
A: No need at all! Extract proxies through ipipgo's API and automatically get the latest IP for each request. theirConcurrent Extraction InterfaceEspecially suitable for distributed crawlers.

Q: What should I do if the collection speed is limited?
A: Two options: ① upgrade to the enterprise version of the dynamic agent to get priority channel ② use the ipipgo client'sIntelligent speed control functionAutomatic matching of target site responsiveness

VI. Why do you recommend ipipgo?

Having used a dozen or so proxy services, I finally chose ipipgo because of these points:
- True Residential IPAll home broadband IPs, unlike some home server room IPs that fool people!
- Complete agreement: When helping a client interface with TikTok collection last year, their Socks5 protocol bypassed detection perfectly!
- Proprietary Programs: Last time there was a medical data collection project, their tech took 48 hours to get the customization protocols done

Recently they've been giving away new subscribers500MB Traffic TrialI'd like to suggest that you experience it first before deciding on it. After all, the agent this thing just look at the parameters can not, you have to actually run the data to know the good and bad.