nodejs cheerio garbled code

During the process of transmitting data, it is easy to encounter the problem of garbled characters. In the process of using nodejs for data crawling, cheerio is often used for document parsing. However, sometimes the content parsed using cheerio will be garbled. This problem may bother many developers using cheerio. This article will introduce the reasons and solutions for garbled characters in cheerio, and help developers quickly solve the problem.

1. Cause of cheerio garbled characters

In the process of parsing the document, if the encoding of the document is inconsistent with the encoding parsed by cheerio, garbled characters will occur. The specific reasons are as follows:

(1) Source file encoding problem. If the source file uses a non-UTF-8 encoding method, such as GBK, GBK2312, etc., and cheerio uses UTF-8 encoding when parsing, the parsed Chinese will be garbled.

(2) Network transmission problem. If the parsed document is transmitted over the network, the encoding method of the network transmission may be inconsistent with the encoding method of cheerio parsing, causing the parsed content to be garbled.

2. Cheerio garbled code solution

The method to solve the cheerio garbled code problem is actually very simple. The specific method is as follows:

(1) Specify the parsing encoding method. When the document uses a non-UTF-8 encoding method, you can specify the corresponding encoding method when cheerio parses, such as GBK, GBK2312, etc. The code example is as follows:

const cheerio = require('cheerio');
const iconv = require('iconv-lite');
const request = require('request');

const url = 'https://www.example.com'; // 需要解析的页面 URL
const options = {
    url: url,
    encoding: null        // 设置编码为 null
};
request(options, function (error, response, buffer) {
    const html = iconv.decode(buffer, 'gbk');     // 将 buffer 转成 GBK 编码的字符串
    const $ = cheerio.load(html.toString());      // 使用 cheerio 加载 HTML 字符串
    console.log($('title').text());               // 输出 title 标签的内容
});

(2) Check the network transmission encoding method. Encoding issues when transmitting documents should be avoided whenever possible. You can use your browser's developer tools to see what encoding is used for network transmission, and then match the encoding to the encoding used when cheerio parses it.

In short, the way to solve the cheerio garbled problem is to pay attention to the encoding method of the document and the encoding method of network transmission to match the encoding method when cheerio parses. Only by paying attention to these issues can developers avoid cheerio parsing garbled characters.

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