Forward Crawler Proxy: Forward Proxy Mode Crawler Dedicated IPs

Why are crawlers always blocked? You may be missing this magic tool

Crawler old iron should have experienced this bad thing: the code is clearly written smoothly, the target site has not changed the structure, but it is every now and then to receive 403 error. At this time do not rush to doubt life, eighty percent of yourLocal IPs are being targeted by website risk controlIt's like going to the grocery store and always using the same face. It's like going to the grocery store and always using the same face. If the security guards don't stare at you, who will?

What the hell is a forward proxy?

Simply put, it's aIntermediate courier station。本来你网购直接寄到家（网站），现在改成先送到快递站（代理服务器），再转寄给你。网站看到的是快递站的地址，根本不知道你本尊在哪。这样就算某个快递站被拉黑，换一家接着用就行。

Hands on Vesting for Crawlers

Using Python's requests library as an example, I'll show you how to use ipipgo's proxy:

import requests

proxies = {
    "http": "http://用户名:密码@gateway.ipipgo.com:端口",
    "https": "http://用户名:密码@gateway.ipipgo.com:端口"
}

resp = requests.get("destination URL", proxies=proxies, timeout=10)

Focus on these two:

1. Don't be rigid in your authentication information: It is recommended to save the account password with a configuration file or environment variable
2. Time-outs should be set appropriately: Adjusted to business needs, too long affects efficiency, too short is easy to misjudgment

Why recommend ipipgo? these points really smell good!

Having used seven or eight proxy services, the reason I ended up locking up ipipgo was three words-firm and accurate. Their IPs are all real home broadband addresses, unlike some service providers who take server room IPs to fill up their numbers. Especially when doing e-commerce data collection, the success rate with their proxy can soar from 50% to 90%+.

And a hidden benefit isControlled IP survival timeThe company's IP address is the same as the IP address of the company's website. When you need long session for price monitoring, you can apply for a fixed IP to maintain a constant line for 2 hours; when you do large-scale collection, you can cut the IP in a second, which is a kind of flexibility that you haven't seen in other companies.

First Aid Guide to Common Potholes

Q: Obviously I used a proxy and still got blocked?
A: Check if the cookie carries identity information, or the request header features are too obvious. It is recommended to randomly change User-Agent for each request. ipipgo has a ready-made fingerprint library in the background that can be directly called.

Q: Suddenly all the agents can't connect?
A: Eighty percent of the target site upgraded the anti-crawl strategy. First, reduce the request frequency, and then contact ipipgo technical support to change the IP segment. They have an "emergency switch" function that can switch the whole IP pool in 5 minutes.

Q: Response speed is fast and slow?
A：在代理设置里开启「智能路由」，ipipgo会自动选择最低的节点。实测能把平均响应时间控制在800ms以内，比手动选节点快一倍。

Tell the truth.

Agent service is not the more expensive the better, it depends on the business scenario. If you are doing short-term public opinion monitoring, choose ipipgo's per-volume package is the most cost-effective; if you are running a long-term data pipeline, you can directly go to the enterprise customized version, and you can also get the exclusive API scheduling interface. Don't be fooled by those fancy features.Stability + PurityIt's the proxy IPs that are hard.