Price Tracker Plugin: Browser Extensions

The Hidden Conundrum of Price Tracker Plugins

Everyone has encountered this situation when shopping online, right? Fancy a commodity just ready to start, the next day the price suddenly went up 200 dollars. At this time if there is an automatic price tracking tool, simply do not too worry. There are many price tracking plug-ins on the market, but there is a pit that many people don't pay attention to -Frequent refreshing will be blocked by the e-commerce site IPThe

As an example, the anti-climbing mechanism of a certain treasure is particularly sensitive. If you use ordinary plug-ins to check a dozen times in half an hour, light pop-up CAPTCHA, heavy directly blocked IP address. At this time you need to think differently, with a proxy IP to decentralize the request, like a guerrilla war.

Make your own anti-blocking plugin

First the entire simplest browser plugin shelf. Create a new manifest.json file, and note that background script is used here to handle proxy settings:

{
  "manifest_version": 3,
  "name": "Intelligent Price Comparison Assistant",
  "version": "1.0", "background": {
  "background": {
    "service_worker": "background.js"
  },
  "permissions": ["proxy", "storage"]
}

The focus is on the proxy IP rotation policy. It is recommended to setChange IP every 5 requestsThis is not easy to trigger anti-climbing, but also to ensure the timeliness of the data. Here we recommend the use of ipipgo's dynamic residential agent, their IP pool is large, change up especially smooth.

Proxy IP configuration tips

Get an IP pool loop mechanism in background.js. Note that different sites have different tolerances, so here's a reference program:

Remember to handle authentication when setting up the proxy. Take ipipgo's proxies for example, their authentication information is integrated directly into the API, so it's not a big deal to use:

function rotateProxy() {
  const newProxy = `http://user:pass@${getIPFromPool()}:8080`;
  chrome.proxy.settings.set({
    value: {
      mode: "fixed_servers",
      rules: {
        singleProxy: {
          scheme: "http",
          host: newProxy.split('@')[1].split(':')[0],
          port: parseInt(newProxy.split(':')[2])
        }
      }
    },
    scope: 'regular'
  });
}

Guidelines on demining of common problems

Q: Do free proxies work?
A: Never! Nine out of ten free IPs are invalid, and the remaining one may be phishing. I've seen free proxies used to engage in price comparison, the result of the price data were all tampered with, blood loss!

Q: How do I choose a package for ipipgo?
A: For personal use, it is fine to choose the one that is billed according to the quantity, and for enterprise users, it is directly on the customized package. They have a smart routing function especially top, can automatically match the fastest line.

Q: What should I do if I encounter a CAPTCHA?
A: This is the time to get onMan-Machine Validation SolutionsThe reason for this is that it's not a good idea to use the same IP address as you do. However, in general, according to the configuration strategy we mentioned, the probability of triggering the CAPTCHA can be reduced by 70% or 80% by using a quality IP from ipipgo.

Advanced Play: Price Early Warning System

After you've taken care of the basic monitoring, you can add an email notification feature. Here's a tip:Monitoring regional pricing with IP from different regions. For example, to monitor a brand's regional promotional prices, use ipipgo's localized IP pool to grab more accurate price data.

Lastly, don't be greedy and set the refresh interval too short. A friend set up a 10-second refresh, the results of the day was blocked more than thirty IP. according to the configuration of the program we give to, guaranteed stable price staring three months without turning the car.