Convert string which is read from a file to json object in nodejs

Question

I am reading a string from a file and want to convert it into a json object File content: {name:"sda"}

Code:

var fs=require('fs');

var dir='./folder/';
fs.readdir(dir,function(err,files){
    if (err) throw err;

    files.forEach(function(file){


        fs.readFile(dir+file,'utf-8',function(err,jsonData){
            if (err) throw err;
            var content=jsonData;
            var data=JSON.stringify(content);
            console.log(data);
        });

    });

But I am getting this output: {name:\"sda\"}

Shanoor · Accepted Answer · 2015-09-29 13:06:01Z

1

Since your file is not a valid JSON, you can use eval (it's a dirty hack but it works), example :

data = '{name:"sda"}';
eval('foo = ' + data);
console.log(foo);

answered Sep 29, 2015 at 13:06

Shanoor

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2 Comments

bangali babu Over a year ago

can't use eval can u give me any other way

Shanoor Over a year ago

I'm curious, why can't you use eval? It's the quickest way, the other way implies to parse your invalid "json" and build an object from it. Something like that: jsbin.com/xexohejuzu/edit?js,output

chridam · Accepted Answer · 2015-09-29 14:13:49Z

1

In addition to JSON.stringify() method which converts a JavaScript value to a JSON string, you can also use JSON.parse() method which parses a string as JSON:

fs.readFile(dir+file,'utf-8',function(err, jsonData){
    if (err) throw err;    
    var content = JSON.stringify(jsonData);
    console.log(content);

    var data = JSON.parse(content);
    console.log(data);

});

Check the demo below.

var jsonData = '{name:"sda"}',
    content = JSON.stringify(jsonData),
    data = JSON.parse(content);

pre.innerHTML = JSON.stringify(data, null, 4);

<pre id="pre"></pre>

edited Sep 29, 2015 at 14:13

answered Sep 29, 2015 at 12:37

chridam

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2 Comments

bangali babu Over a year ago

cant do JSON.parse because it is not in json format When i am doing that i am getting this error:- Unexpected token name

chridam Over a year ago

In that case use a combination of the two methods, I've updated my answer to reflect this.

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