JavaScript Fetch API: JS Proxy Fetch Requests

I. Why do Fetch requests need a proxy IP?

We usually use JavaScript to write web crawlers or tune the interface, often encountered the target site IP blocking. For example, if you take the IP of your own server to frequently request a website, it will be blacked out in less than half an hour. This time you need a proxy IP torotational identityIt's like playing hide-and-seek and constantly changing vests.

The traditional approach is to do proxy on the server side, but the front-end direct call is more economical. Let's say with ipipgo's dynamic residential IP, each request automatically change the IP address, the site pressure can not tell if the real person operation.

// As a chestnut: a Fetch request with a proxy
const proxyUrl = 'http://username:password@proxy.ipipgo.com:8080';
const targetUrl = 'https://target-site.com/api';

fetch(targetUrl, {
  method: 'GET', {
  headers: {'Content-Type': 'application/json'}, proxy: proxyUrl // key configuration
  proxy: proxyUrl // key configuration items
})
.then(response => response.json())

Second, three steps to get the Fetch agent configuration

Here's a great trick to teach you how to use ipipgo's proxy service in just three steps:

1. Go to the ipipgo backend to generateAPI Extraction Links, get an address like this:
https://api.ipipgo.com/get?key=您的密钥

2. Dynamically obtain the proxy IP in the code:

async function getProxyIP() {
  const res = await fetch('https://api.ipipgo.com/get?key=YOUR_KEY');
  const { ip, port } = await res.json();
  return `http://${ip}:${port}`;
}

3. Plug the proxy configuration into the Fetch request:

async function fetchWithProxy() {
  const proxy = await getProxyIP();
  await fetch('Your destination address', {
    agent: new HttpsProxyAgent(proxy) // need to introduce https-proxy-agent
  });
}

Third, I've stepped over these potholes for you

I recently discovered this while helping a client with data collection:

• Using free proxies often encountersSSL Certificate ErrorI don't think that's gonna happen with ipipgo's dedicated agent.
• Dynamic residential IP to be setInterval of 3 seconds or moreIf you're too fast, you'll be recognized as a robot.
• Remember to put in the request headerX-Forwarded-ForFake Real IP

IV. Clearance of QA FAQs

Q: What can I do about slow proxy IPs?
A: change to ipipgo's static residential IP, 35 dollars a month fixed address, suitable for long-term tasks

Q: What's wrong with the constant prompt of authorization failure?
A: Check two things: 1. whether the API key is expired 2. whether the account balance is sufficient (don't laugh, some people really forget to charge)

Q: Do you support HTTPS sites?
A: Must! ipipgo full support HTTP/HTTPS/Socks5, encrypted transmission is as stable as a dog!

Fifth, how to choose the package does not cost money

Lastly, I would like to say that if you encounter a high frequency of IP blocking, you should directly ask the ipipgo technology guy for aCustomized SolutionsThey can adjust the rotation strategy according to the specific business, which is much more worrying than tossing it yourself. Sensei you want Southeast Asia small language IP, or Europe and the United States super data collection, their family of more than 200 countries of the resource base can basically cover.