Nodejs reads garbled files

When reading files in Node.js, it is easy to encounter garbled characters. One common reason is that the file is not encoded in the correct format.

In Windows operating systems, the default text encoding format is GBK, but in most Unix and Linux operating systems, UTF-8 encoding format is used. Therefore, if a GBK-encoded file is opened in a Unix or Linux operating system, it will most likely produce garbled characters.

There are many ways to deal with the garbled problem during Node.js file reading. The following common methods are provided below:

1. readFile() method

In Node.js, use the readFile() method of the fs module to read files . This method takes two parameters: file name and callback function. The callback function contains two parameters: the error object and the read data.

When reading a file, you can specify the encoding format of the file through the options parameter. For example, to specify the encoding as UTF-8, set the options parameter to {encoding: 'utf-8'}.

The following is an example of using the readFile() method to read a file:

const fs = require('fs');

fs.readFile('example.txt', { encoding: 'utf-8' }, (err, data) => {
    if (err) throw err;
    console.log(data);
});

2. createReadStream() method

In addition to the readFile() method, you can also Use the createReadStream() method of the fs module to read the file. This method creates a Readable Stream that can read the file contents step by step.

The following is an example of using the createReadStream() method to read a file:

const fs = require('fs');

const readStream = fs.createReadStream('example.txt', { encoding: 'utf-8' });

readStream.on('data', (data) => {
    console.log(data);
});

readStream.on('error', (err) => {
    throw err;
});

3. iconv-lite module

iconv-lite module is a module for A third-party module that handles text encoding in Node.js. It supports multiple encoding formats, including GBK, UTF-8, ISO-8859-1, and more.

The following is an example of using the iconv-lite module to read files:

const fs = require('fs');
const iconv = require('iconv-lite');

const buffer = fs.readFileSync('example.txt');
const content = iconv.decode(buffer, 'gbk');

console.log(content);

The above method can help you deal with garbled characters during file reading in Node.js. Just choose the method that suits you based on your specific needs.

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