Nodejs将文本转换为JSON [英] Nodejs Convert text to JSON

问题描述

出于某种原因，我很难将此txt文件转换为实际的javascript数组。

For some reason I'm having such a hard time converting this txt file to an actual javascript array.

myJson.txt

{"action": "key press", "timestamp": 1523783621, "user": "neovim"}
{"action": "unlike", "timestamp": 1523784584, "user": "r00k"}
{"action": "touch", "timestamp": 1523784963, "user": "eevee"}
{"action": "report as spam", "timestamp": 1523786005, "user": "moxie"}

目前我所拥有的不起作用

Currently what I have that doesn't work

const fs = require('fs');

function convert(input_file_path) {
    const file = fs.readFileSync(input_file_path, 'utf8');
    const newFormat = file
      .replace(/(\r\n\t|\n|\r\t)/gm,'')
      .replace(/}{/g, '},{');

    console.log([JSON.parse(newFormat)]);
}

convert('myJson.txt');

推荐答案

由于您的文件每行包含一个JSON对象，可以使用 readline 逐行读取该文件。

Since your file contains a JSON object per line, you could read that file line by line, using readline.

然后解析每一行，并推入数组，然后在完全读取文件后返回（解决）。

Each line is then parsed, and push into an array, which is then returned (resolved) after the file is fully read.

'use strict';

const fs = require('fs');
const readline = require('readline');

function convert(file) {

    return new Promise((resolve, reject) => {

        const stream = fs.createReadStream(file);
        // Handle stream error (IE: file not found)
        stream.on('error', reject);

        const reader = readline.createInterface({
            input: stream
        });

        const array = [];

        reader.on('line', line => {
            array.push(JSON.parse(line));
        });

        reader.on('close', () => resolve(array));
    });
}


convert('myJson.txt')
    .then(res => {
        console.log(res);
    })
    .catch(err => console.error(err));

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