Map Data Extraction Tool: Map Data Collection

Why does map data collection always get stuck? Try this wildcard.

Anyone who works with map data understands that hard-written crawler programs move aroundGetting blackballed from a website. Yesterday, the script could run normally, today suddenly 403, angry want to smash the keyboard. In fact, this thing is similar to guerrilla warfare, you have to learn tolit. shoot one shot and change placesThe

Why does your crawler always get caught?

The site's anti-climbing mechanism is now so refined that it catches people by three main methods:

The most fatal thing here is the IP problem, many newbies directly use their own server IP hard, the result is a minute to be shut down the small black room.

Hands-On Manual (Hands-On Edition)

Take Python crawler as an example, let's use ipipgo's proxy service as a demonstration. First, register on the official website to get aFree Trial Pack, get the API interface address.

import requests
from random import choice

 Proxy pool from ipipgo
proxy_list = [
    "http://user:pass@gateway.ipipgo.com:30001",
    "http://user:pass@gateway.ipipgo.com:30002", ...
    ... Prepare at least 20 entries
]

def get_map_data(url).
    try.
        proxy = {'http': choice(proxy_list)}
        response = requests.get(url, headers={'User-Agent': 'Mozilla.0 (Windows)')
            headers={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64)'},
            proxies=proxy,
            timeout=10
        )
        return response.text
    except Exception as e.
        print(f "Retry with another IP: {e}")
        return get_map_data(url)

Note that here there are two tiresome operations: 1, randomly selecting a proxy for each request 2, automatically retrying when an exception is encountered. ipipipgo's proxy poolSurvival rate maintained above 95%It's a lot less work than building your own agent.

A Guide to Avoiding the Pit (Blood and Tears)

1. Don't try to use free proxies, the kind of 10 IP9 dead simply can't be used.
2. access interval of at least 3 seconds, too fast even the best agent can not carry
3. Remember to change the User-Agent regularly, do not always use a browser fingerprints
4. Don't fight hard when encountering CAPTCHA, you should go to the coding platform.

QA First Aid Kit

Q: How to test the proxy IP I just bought?
A: Use the ipipgo backend of theOnline Debugging ToolsIt can be used to check the response speed of the proxy by inputting the target URL to see the return status directly.

Q: What should I do if my IP is blocked halfway through the collection?
A: Immediately stop access to the current IP, go to the ipipgo consoleOne-click IP pool refresh, their IP inventory is updated 200,000+ per day, which is perfectly adequate.

Q: What if I need to run multiple crawlers at the same time?
A: Created in the ipipgo backendmultiline groupingThe company also supports the use of a separate IP pool for different crawlers to avoid interfering with each other. Their home supports up to500 concurrent requestsThe batch collection is especially powerful.

One final rant, data collection is a constant battle. Using the right tools can save you the trouble of 90% like ipipgoWith automatic IP rotationThe service has been measured to increase collection efficiency by more than 3 times. Newbies are advised to start with theirpay-per-use packageYou can use as much as you want without wasting it.