Node.JS / Express.JS : 将数据从 CSV 文件正确转换为 JSON

Question

我打算从 CSV 文件加载数据并在 Express Router 中发送它作为 JSON 数据。

我的 CSV 文件如下所示：

• 没有标题，
• 我的行分隔符就是 "/n" ,

• 我的价值观在 " "

  "2171106","2017-07-03 00:27:24","France","3","Desktop","Mac","Firefox","2170248","77.98" "800309","2017-07-03 03:23:21","France","9","Desktop","GNU/Linux","Safari","2170296","85.39" "805789","2017-07-03 03:34:32","France","1","Tablet","iOS","Mobile Safari","2170299","61.49" "2171167","2017-07-03 04:42:47","France","1","Desktop","Windows","Chrome","2170314","39.99" "2171170","2017-07-03 04:50:02","France","1","Desktop","Windows","Chrome","2170320","20.89" "838601","2017-07-03 05:48:38","France","1","Smartphone","iOS","Mobile Safari","2170323","66.88" "2171173","2017-07-03 06:09:28","France","1","Desktop","Windows","Microsoft Edge","2170407","57.77" "1659566","2017-07-03 06:28:08","France","1","Smartphone","Android","Chrome Mobile","2170416","32.99" "835619","2017-07-03 06:46:00","France","4","Desktop","Windows","Firefox","2170419","203.93" "773872","2017-07-03 06:51:14","France","8","Tablet","iOS","Mobile Safari","2170422","285.79" "2171241","2017-07-03 06:54:30","France","1","Desktop","Mac","Safari","2170425","29.49" "2171238","2017-07-03 07:02:48","France","1","Desktop","Windows","Firefox","2170434","49.95" "1570588","2017-07-03 07:08:09","France","1","Desktop","Windows","Microsoft Edge","2170437","61.06" "2111374","2017-07-03 07:08:21","英国","1","平板电脑","iOS","移动 Safari","2170440","36.58" "1604941","2017-07-03 07:18:38","France","2","Tablet","iOS","Mobile Safari","2170452","30.89" "2095884","2017-07-03 07:25:34","France","1","Tablet","iOS","Mobile Safari","2170458","65.79" "2171259","2017-07-03 07:26:48","France","1","Desktop","Windows","Firefox","2170461","62.67" "860366","2017-07-03 07:30:46","France","1","Desktop","Windows","Chrome","2170464","137.67"

为了更好地展示它，这里是：

我只想将这些数据解析为一个对象，然后在 express 中以 json 格式发送。

我使用了几个库：csvjson、csvtojson、papaparse ... 但每次转换都会出现问题。

这是我的服务器代码：

var express = require("express");
var app     = express();
var path    = require("path");
var fs = require('fs');
var Converter  = require("csvtojson").Converter;

var fileStream = fs.createReadStream("data.csv");
var jsonData;
//new converter instance
var converter = new Converter({constructResult:true});

//end_parsed will be emitted once parsing finished
converter.on("end_parsed", function (jsonObj) {
    jsonData = jsonObj
});
fileStream.pipe(converter);

app.get("/list",function(req,res){
    res.json(jsonData);
});

app.listen(3000);
console.log("Running at Port 3000");

运行时，转换出错，显示数据如下：

如您所见，这是完全错误的： 例如，这是第一个输出的元素： 几乎图书馆都以同样错误的方式转换它，我认为我的代码中有一个 missing config。 （表格可能会分行）

有什么建议吗？？

Answer 1

来自 csvtojson API 文档：

noheader：表示csv数据没有标题行，第一行是数据行。默认为假。

所以也许在你的 Converter 构造中添加 noheader:true。