VBA Web Crawl: Excel Automated Capture

VBA can also play the web page to pick books? Teach you to use Excel to gripe data

The old drivers who do data collection know that the most afraid of using Excel to write VBA scripts to capture web pages, IP is blocked! The hard-written code runs for two days on the break, who can withstand this? Today, we will teach you how to give VBA scriptsvestThe following is an example of a proxy IP implementation.Long-term stabilization of cadastre collectionThe

Why the vest for VBA?

To give a chestnut: you use your own broadband every day to pick the price of an e-commerce company, the first two days well, the third day suddenly returned to the403 error. This is where the website is putting your IP in a small dark room! This is when you need a proxy IP toDisguise your true identityIt's like this:

To the VBA vest tutorials

Here's an example of an HTTP proxy from ipipgo (other brands are not recommended), prepare three things first:

1. ipipgo's API interface link (ask customer service for it)
2. whitelisted IP authentication (more secure than account secret)
3. proxy server address:port

The key code is written like this:

Sub Cadastre Data()
    Dim http As Object
    Set http = CreateObject("MSXML2.XMLHTTP")

    ' Get dynamic proxy from ipipgo (emphasis added!)
    proxy = GetProxyFromIPIPGO()

    http.Open "GET", "Target URL", False
    http.setProxy 2, proxy, "" ' set proxy
    http.send

    ' Process the returned data...
End Sub

Function GetProxyFromIPIPGO()
    ' Call the ipipgo API to get the latest proxy IP.
    ' It is recommended to randomize the IP for each request.
End Function

Avoid the three big pits

1. Don't use free agents.: slower than a snail's pace and less stable than tears
2. IP switching frequency: Change IP every 5 minutes for high-frequency visits
3. Exception handling: Remember to addOn Error Resume Nextcrashworthiness

QA time

Q: What should I do if my proxy IP is not working?
A: Use ipipgo'sIntelligent Fusing MechanismThe system automatically eliminates failed nodes, which is 10 times more stable than ordinary proxies.

Q: How can I increase the speed of book picking?
A: Try ipipgo'sExclusive High Speed AccessIt is 3-5 times faster than the shared agent and is especially suitable for grabbing data.

Q: What if I need to deal with CAPTCHA?
A: with ipipgo'sHigh Stash Agents+ Randomized UA header that reduces 90% CAPTCHA triggering rate

Why do you recommend ipipgo?

Real life experience after two years of use in my own home:
- Average response <80ms (others at least 200ms+)
- 23 countries and regions covered (a must for doing cross-border e-commerce)
- There are specializedExcel Data Acquisition Package(Call customer service and give the code word "VBA" for 10% off)

Finally, a nagging word: VBA Cadastre is not what high-tech, the key is toFinding the right tool + using the right methodThe next time the IP is blocked, don't delete the code. Next time you encounter IP blocked don't be in a hurry to delete the code, change a vest and continue to do!