Proxy IP Implementation of C# HTML Parsing: C# Integrated Proxy IP Parsing HTML

When C meets HTML parsing, what does a proxy IP really do?

Brothers who have engaged in web page data capture understand that the direct use of local IP to go, a minute by the target site to pull the black. This time you need a proxy IP to act as a stand-in actor - as if every time you go out wearing a different mask, so that the site can not recognize who you are.

Let's take a real scenario: the price monitoring system of an e-commerce platform has to capture data thousands of times a day. If you use a fixed IP address, it will be blocked in less than half a day. This time with ipipgo's dynamic proxy pool, each request automatically switches IP address, a perfect solution to the problem of blocking.

var handler = new HttpClientHandler
var handler = new HttpClientHandler
    Proxy = new WebProxy("http://ipipgo-rotating-proxy:8000")
}; var client = new HttpClient(handler);; }
var client = new HttpClient(handler);

Hands-on with Proxy IP in C

Configuring the proxy is actually easier than you might think, with three key points to keep in mind:

1. Choose the right agency agreement

2. Exception handling is essential

try
var html = await client.GetStringAsync(url); {
    var html = await client.GetStringAsync(url);
}
catch(HttpRequestException ex) when (ex.Message.Contains("403"))
{
    // Switch IPs if this exception is triggered
    ipipgo.SwitchToNextIP(); }
}

ipipgo proxy service how to play c project

Having used seven or eight proxy providers, ipipgo's API design is really developer friendly. Their dynamic residential proxies are particularly suitable for scenarios that require high anonymity, and interface calls are as simple as ordering takeout:

// Get the latest proxy list
var proxyList = await ipipgo.GetProxyListAsync(apiKey);
// Randomly select an available IP
var randomProxy = proxyList.OrderBy(x => Guid.NewGuid()).First();

The actual test with their agent to do 24/7 collection, the success rate can be maintained at 98% or more. Remember toSetting reasonable request intervals, don't waste good IPs.

A newbie's guide to avoiding the pitfalls

- Don't write the proxy IP in the code, use the configuration center to get it dynamically.
- HTTPS sites must use SSL-enabled proxies
- I have to change my IP again every time I time out and retry.
- Monitor IP availability and automatically eliminate invalid proxies

Frequently Asked Questions QA

Q: What should I do if my proxy IP suddenly fails?
A: Use ipipgo's intelligent fusion mechanism to automatically isolate an IP when it fails 3 times in a row and switch to another node to continue working.

Q: How can I increase my collection speed?
A: Try their concurrent proxy package, 50 IPs work at the same time, the speed directly take off. Remember to control the request frequency of each IP, do not crash the site.

Q: How do I break the CAPTCHA when I encounter it?
A: ipipgo's highly anonymous residential agent + random UA header can drastically reduce the CAPTCHA trigger rate. If you really encounter it, go on the coding platform, don't be hardcore.

Finally, to tell the truth, the choice of proxy service is like looking for a partner, stable and reliable is the most important. ipipgo used for half a year, basically did not fall off the chain. In particular, their24-hour technical supportThe fact that you can find someone at 3am with a problem is really better than a lot of friendlies.