Site-wide crawler with robots.txt: Compliance Crawl Configuration

What is the biggest fear of the whole site crawler?

If you've ever engaged in data capture, you know that server IP blocking is as common as eating. Yesterday, the script was running well, today suddenly stuck - open the log to see.403 error directly to the face. That's when it hits you that the target site has long since put your IP address in a small black room.

There is an e-commerce friend is even worse, their team in order to compare prices need to capture the competitor's data. As a result, they were banned for three consecutive days for more than 20 IPs, and the technical guy was so anxious that he was pulling his hair out. Later used a dynamic proxy IP pool.Survival rate soared directly from 30% to 90%, which is a good way to stabilize the position.

robots.txt is not a setup, but it's not a shackle either

Many crawler newbies see robots.txt and freak out, but it's not necessary at all. This file is like the doorway to the websiteVisiting Information, tells you which areas you can enter and which to detour around. But note three things:

Be aware of the practical use ofCrawl-delay parameter, for example, set a 10-second interval. But this is too slow for site-wide crawling, which is then realized by proxy IP poolsConcurrent requests, both in terms of compliance and efficiency.

Proxy IP configuration tips

As an example, Python's requests library is demonstrated with ipipgo's dynamic residential proxy. The key is toAutomatic switching of export IPs, here's a tip - randomly pick proxy nodes before each request:

import requests
from ipipgo import get_proxy Assume this is the SDK for ipipgo.

def crawler(url).
    proxy = get_proxy(type='residential') get residential proxy
    proxies = {
        "http": f "http://{proxy['username']}:{proxy['password']}@{proxy['server']}",
        "https": f "http://{proxy['username']}:{proxy['password']}@{proxy['server']}"
    }
    response = requests.get(url, proxies=proxies, timeout=10)
    return response.text

Notice the use ofUsername + Password AuthenticationInstead of IP whitelisting, because ipipgo's proxy service supports two authentication methods. It is recommended to prioritize the account password mode, so that you don't have to change the server configuration frequently when switching proxies.

Top 3 Tips to Prevent Banning

1. IP Rotation Strategy: No more than 500 requests per day from a single IP address.
2. request header masquerading as: Remember to bring Referer and common browser UA's!
3. Exception handling mechanism: Switch proxies immediately and retry if you encounter a 403.

The focus here is on ipipgo'sIntelligent Routing Function. Their proxy service can automatically match local IPs based on the location of the target website, for example, if you catch a Japanese website, you can use the Tokyo server room node, so that the probability of being recognized as abnormal traffic will be significantly reduced.

Frequently Asked Questions QA

Q: What should I do if the target website robots.txt completely prohibits crawlers?
A: In this case, it is recommended to contact the website side to get authorization first. If you really need to capture, use ipipgo'sHigh Stash Proxy IPIn conjunction with randomized request intervals, single IP requests are controlled to less than 3 per minute.

Q: How to choose between dynamic and static proxies?
A: Dynamic proxies are a must for full-site crawlers! Static IPs are suitable for scenarios where the session is maintained over a long period of time, such as keeping logged in. ipipgo's dynamic IP pool supportsPer request billing, a better deal than a monthly package.

Q: How do I break the CAPTCHA when I encounter it?
A: Immediately suspend the current IP request, change to a new IP and then reduce the collection frequency. ipipgo's10Gbps Ultra High Speed AgentCan quickly switch IP, with the use of coding platform for better results.

Tell the truth.

Seen too many people use proxy IPs as a panacea and end up getting blocked worse. The point isrational useInstead of brainlessly piling up the number of IPs. Recently, I helped a client to do a stress test, polling 500 dynamic IPs with ipipgo, and collecting millions of data stably for 48 hours in a row.Blocking rate controlled below 0.7%. What does this data say? Choosing the right service provider + configuration for compliant acquisition is completely achievable.

One last reminder for all you creepy-crawly peeps out there:Never run scripts directly locally! Home broadband IP blocking can affect normal internet access. Using a proxy server as an isolation layer is safe and does not affect daily use. If you need to test it, ipipgo now has theFree Trial Package, 1G of free traffic for new registration, enough for small-scale testing.