XPath Include Match: XPath Crawl Combined with Proxy IP Configuration Tips

First, XPath crawl for why to take a proxy IP?

Brothers engaged in data crawling understand that using XPath to pick up web pages is like using chopsticks to clip vegetables - too direct and easy to be burned mouth. Website anti-climbing mechanism is now very refined, the same IP high-frequency request minutes to give you a blacklist. This time you have to rely on proxy IP to"Guerrilla warfare.", change your vest and get back to work.

For example, if you want to catch the price data of an e-commerce platform and request 50 times with your own broadband, the page will directly give you a CAPTCHA. But if you change the IP every 5 times, the success rate can be more than tripled. This is whyXPath and Proxy IPs are the golden couple!The

Second, the actual configuration of four steps

Demonstrated here with a combination of Python+Requests+lxml (don't panic, the code is simple):

import requests
from lxml import etree

 Extract the proxy from ipipgo (remember to replace it with your own account)
proxy = "http://用户名:密码@gateway.ipipgo.com:端口"

headers = {'User-Agent': 'Mozilla/5.0'}

for page in range(1,6):: {'User-Agent': 'Mozilla/5.0'}
    try: resp = requests.get('User-Agent': 'Mozilla/5.0'})
        resp = requests.get(
            url=f'https://目标网站/page/{page}',
            proxies={'http': proxy, 'https': proxy},
            headers=headers,
            timeout=10
        )
        html = etree.HTML(resp.text)
         XPath locates the prices element
        prices = html.xpath('//div[@class="price"]/text()')
        print(f "Page {page} data grabbed successfully")
    except Exception as e.
        print("Triggered anti-climbing, is changing IP...")
         Here we call ipipgo's API to change the IP.

Key point reminder:

• Don't set the timeout more than 15 seconds, or it will affect efficiency.
• Automatic switching of IP pools for each exception trigger
• User-Agent suggests preparing 10 sets of rotations

Third, the proxy IP selection doorway

Not all proxies are suitable for XPath crawling, focus on these three metrics:

Personally tested ipipgo'sDynamic Residential Enterprise EditionIn the e-commerce website crawl in the most stable performance, more than 9 yuan 1G flow enough to run 20,000 times the ordinary request, more cost-effective than some of the charge by the number of IP.

IV. Guidelines for avoiding pitfalls

Three common mistakes newbies make:

1. Failure to set the timeout parameter, causing the program to die.
2. XPath paths are written to death, site revamping fails (contains fuzzy matching is recommended)
3. Proxy IP quality is poor, using the use of the "dumb cannon"

Write more robust XPath like this, for example:

//div[contains(@class,'prod_item')]//span[contains(text(),'¥')]

V. You ask, I answer

Q: Do I need to maintain the availability of the proxy IP myself?
A: If you use ipipgo's API to get it dynamically, their server will automatically filter the failed nodes, so we just use it.

Q: What should I do if I encounter Cloudflare protection?
A: Going on their TK line with request interval randomization has been personally tested to break 90%'s 5-second shield.

Q: Why do you recommend residential agents?
A: Data center IPs are easy to identify, and residential IPs go on the carrier's real user line, which is much more camouflaged.

Sixth, private skills to give away

1. Randomly wait 0.5-3 seconds before each request to simulate a real person's operation
2. Important items recommended to buy ipipgo'sDedicated Static IPIt's a bit more expensive, but it's more stable than a shared IP.
3. encounter particularly difficult to get a website, directly to their technical customer service to customize the program, than their own folding to save time!

Finally, don't be greedy and use a free proxy, or data leakage or legal risk. Regular business or choose ipipgo this kind of has aTK Linerespond in singing200 countries coveredof service providers, data security is much more important than those few dollars.