What is the reason for encoding exceptions when using the request library to get HTML text in Node.js? How to solve it?

Solution to Node.js's encoding exception when using request library to get HTML text

In Node.js, when using the request library to crawl web page content, you often encounter encoding problems that lead to garbled output. This article analyzes the causes of this problem and provides solutions.

Problem description:

Use the request library to get the web page HTML. The browser displays normally, but the printing result in Node.js environment is garbled. For example:

 const request = require('request');

function getGoods() {
  request('https://www.58moto.com/used-car/1470264', (err, res, body) => {
    console.log(body); 
  });
}

getGoods();

Problem analysis:

The request library does not automatically handle response content encoding by default. When the server response header Content-Type does not explicitly specify the character set, request library may return data in binary form, resulting in garbled code.

Solution:

It is recommended to use the axios library instead of request . axios can automatically identify and process encoding to avoid garbled code problems.

 const axios = require('axios');

function getGoods() {
  axios.get('https://www.58moto.com/used-car/1470264')
    .then(response => {
      console.log(response.data);
    })
    .catch(error => {
      console.error(error);
    });
}

getGoods();

axios ' automatic encoding processing function can effectively solve the problems encountered by request library when processing encoding, and ensure that the correct HTML text content is obtained. If you still encounter problems, you can check Content-Type header information returned by the server and manually set the encoding options of request , such as encoding: 'utf8' , but this is not as convenient and reliable as axios ' automatic processing.

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