Node.js Data Fetching | Axios Crawler Practical Cases

First, why crawlers need proxy IP?

Crawlers must have encountered this situation: the program that was running well suddenlybe stuck in a rutIf you have a reliable proxy IP on hand, it is like playing a game with a resurrection armor on, you can immediately come back to life. At this time, if you have a reliable proxy IP on hand, it is the same as playing the game open the resurrection armor, immediately can be resurrected from the same place full of blood.

Take a real scenario: for example, you want to catch the price data of an e-commerce platform, the same IP request dozens of times in a row, the other server immediately alert. But if each request for a different export IP, just like the martial arts novel of disguise, the server simply can not recognize you are the same person.

Second, Axios configuration agent 5 minutes to get started

Adding proxies with Axios in Node.js is actually quite simple, here's an example of aplug-and-playconfiguration templates:

const axios = require('axios');
const httpsProxyAgent = require('https-proxy-agent');

// proxy information from ipipgo backend
const proxy = {
    host: 'gateway.ipipgo.com',
    
    auth: 'Your account:password'
};

const agent = new httpsProxyAgent(`http://${proxy.auth}@${proxy.host}:${proxy.port}`);

axios.get('Target URL', {
    httpsAgent: agent, {
    timeout: 8000
}).then(response => {
    console.log('Data arrived:', response.data);
});

Note a few key points:

Third, ipipgo actual test avoidance guide

I have used seven or eight proxy service providers, and finally used ipipgo for a long time mainly because of three real advantages:

1. IP pool(med.) recovery ratehigh, and can also maintain more than 85% available during the evening peak hours
2. The average response time is around 200ms, twice as fast as some of the ones claiming to be "very fast".
3. Flexible pricing scheme for small-scale crawlersquantity-based packagebest value

Recently done a project data: with the ordinary agent success rate of only 62%, change ipipgo directly after pulling to 93%, the effect is immediately apparent.

IV. First aid kit for common problems

Q: What should I do if my proxy IP suddenly fails?
A: First check if the account is in arrears, then look at the IP whitelist settings. ipipgo has real-time availability monitoring in the background, and it is recommended to turn on the automatic switching mode.

Q: How can I improve the efficiency of data collection?
A: three tricks: ① use connection pooling technology ② set a reasonable request interval ③ use ipipgo's exclusive IP package

Q: What if I need to run multiple crawlers at the same time?
A: ipipgo supportmultiplexIf you create multiple sub-accounts in the background, you can use separate authentication information for each crawler process.

Fifth, the choice of agent services to see which doorway

Agent service providers on the market are a mixed bag, to teach you a fewThe best way to avoid lightning::

• Test whether the IP is clean: use ipipgo's online inspection tool to check the associated blacklist
• Look at the response speed: continuous ping 20 times, the fluctuation is not more than 50ms to be qualified.
• Check the after-sales service: only those who can respond within 10 minutes are considered reliable.

Finally, the big truth: the reptile business is all aboutTools determine efficiencySince using ipipgo's residential agency. Since the use of ipipgo's residential agent, the project delivery speed is directly twice as fast, the father of the party have praised our team professional. If you need to go to their official website to take a look, new users to send 5G traffic trial, enough to run a small project.