Parse JSON-like data in NodeJS

Question

I am getting a return from an API call through NodeJS as data similar to JSON.

I am getting the reply as:

{ abc: 10,
  qwe: 5 }

If the above was as shown below:

{ "abc": 10,
  "qwe": 5 }

I could have used JSON.parse function, but the former can't be used with JSON.parse.

Is there any way I can get the value of qwe from that response?

Do you need to parse the data, or is it actually already in json format? What happens when you try to log data.qwe from your request for example? It may help us if you show a little more code surrounding the result that gives you the format in question. — ThisClark
– ThisClark, Commented Feb 3, 2018 at 20:00
It is in the former format (one without the quotes). So, I cannot parse it with JSON.parse neither data.qwe — remedcu
– remedcu, Commented Feb 3, 2018 at 20:02

CodeAt30 · Accepted Answer · 2018-02-03 20:30:53Z

2

Option 1: It's already an object.

The item you're showing is already an object. It doesn't need parsing through. JSON.parse() is meant to go through a string and turn it into an object. just work with the object itself.

Example:

const object = {abc:10, qwe:5};

console.log(object.abc);       // > 10
console.log(object["qwe"]);    // > 5

Option 2: It is a non-JSON string.

In this case maybe you can predict the pattern and manually turn into a JSON format that you can parse later?

something like:

const nonJson = "{abc: 10, qwe: 5 }";
let jsoned = nonJson.replace(/(:\s+)/g, "\":\"");
jsoned = jsoned.replace(/(,\s+)/g, "\",\"");
jsoned = jsoned.replace(/({\s*)/, "{\"");
jsoned = jsoned.replace(/(\s+})/, "\"}");

const object = JSON.parse(jsoned);

edited Feb 3, 2018 at 20:30

answered Feb 3, 2018 at 20:05

CodeAt30

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Comments

Terry Lennox · Accepted Answer · 2018-02-03 20:30:55Z

1

There is a way to do this, it's a bit ugly though, you can do:

var unquotedJson = '{ abc: 10, qwe: 5 }';

var object = eval('('+ unquotedJson +')');

NB: eval is only to be used with a trusted source, since it will execute JavaScript code.

I should also mention that unquoted JSON is not really JSON!

edited Feb 3, 2018 at 20:30

answered Feb 3, 2018 at 20:05

Terry Lennox

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2 Comments

charlietfl Over a year ago

Should also note that it doesn't come without serious security concerns also

Terry Lennox Over a year ago

You're right, eval is dangerous, only to be used with a trusted source.

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