QWebEngine set proxy IP: Qt application embedded browser proxy scheme

What the hell does this thing do?

Crawlers may have encountered such a situation, with Qt wrote an embedded browser to capture data, the results of the target site click block IP. this time if you can give the QWebEngine a vest to change the identity of the thing is much better. To put it bluntly is to make the program like a chameleon, each visit with a different IP address out of the door.

To give a real example, there is a team doing e-commerce price comparison, they used Qt to make a batch query tool. As a result, a shopping platform detected frequent visits to the same IP, directly to the black. Later they gave QWebEngine hang ipipgo dynamic residential proxy, every hour automatically switch 200 + IP, data collection never turn over.

Two Tips to Fix Proxy Settings

The first move is a global agent:Ideal for situations where the entire application is going to go proxy, configured directly at program startup. Be aware that it may affect other network requests though.

// Add these lines to the main function
QNetworkProxy proxy; proxy.setType(QNetworkProxy::HttpProxy)
proxy.setType(QNetworkProxy::HttpProxy); proxy.setHostName("proxy.ipipgo.com"); // Replace with the actual proxy.
proxy.setHostName("proxy.ipipgo.com"); // Replace with the actual proxy server.
proxy.setPort(9001);
QNetworkProxy::setApplicationProxy(proxy);

The second trick is precise control:Setting up the proxy only for the browser component does not affect the rest of the program. This method is more flexible and suitable for scenarios that require multiple browser instances.

QWebEngineProfile profile = new QWebEngineProfile(this);
QNetworkProxy proxy.
proxy.setType(QNetworkProxy::HttpProxy); proxy.setHostName("dynamic.ipipgo.net")
proxy.setHostName("dynamic.ipipgo.net"); //dynamic residential proxy address
proxy.setPort(32000.

profile->setProxy(proxy);
QWebEnginePage page = new QWebEnginePage(profile, this);
webView->setPage(page);

ipipgo hands-on configuration manual

Here's a recommendation to use their Dynamic Residential package for the best value for money. It's a three-step process:

1. Go to the official website to register and enter the console, select the HTTP proxy channel.
2. Select API Extraction in "Access Method" and get the interface address:
https://api.ipipgo.com/get?key=你的密钥&count=10
3. Code regularly request this interface to get the latest IP pool

Frequently Asked Questions

Q：Why doesn't the proxy take effect after I set it?
A: First check three points: 1. port is not filled in the wrong 2. proxy type selection is not selected correctly 3. network environment allows external connections. It is recommended to use Postman to test the proxy address first

Q: What if I need to switch IP frequently?
A: Dynamically modify the proxy settings of QWebEngineProfile in the page load completion callback. Together with ipipgo's API extraction, it can realize the new IP every time you visit.

Q: How do I choose between dynamic and static proxies?
A: You need to maintain the session for a long time to choose static (such as analog login), short-term high-frequency collection with dynamic. If the budget is sufficient, it is recommended to use the two packages together.

Cold Tricks

There's a hidden feature many people don't know about - the ability to set different proxies for different tabs. By creating multiple instances of QWebEngineProfile, each instance is bound to a different proxy configuration. This enables parallel multitasking collection, directly doubling efficiency.

For example, when doing price comparison, you can have 5 tabs open at the same time:
- Label 1 with US IP
- Label 2 with Japanese IP
- Tag 3 takes the TK line
…
Each page carries a different geographic identity to collect data, which is not prone to triggering a windfall, but also captures geographically differentiated information.

Lastly, you should pay special attention to the memory management of the proxy settings. Every time you create a new QWebEngineProfile, remember to set the parent object, otherwise it is easy to memory leaks. If you can't figure it out, ipipgo's tech support can help you look at the code, and this 1v1 service is quite useful.