convert HTML entities in a JSON

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I have a this kind of awful JSON file { "foo": "bar ’ foo ’" }.

Is there a way - using preferably jq - to convert the HTML entities then in this example to convert ’ in ’.

I need to convert them programmatically. This JSON is only an example.

Thank you

This is an easy-to-use HTML entity encoder/decoder called he that was written in JavaScript. It is not jq based, but it should allow you to do what you are attempting with relative ease.

https://github.com/mathiasbynens/he

INSTALL:

Via npm:

npm install he

Via Bower:

bower install he

Via Component:

component install mathiasbynens/he

In a browser:

<script src="he.js"></script>

In Node.js, io.js, Narwhal, and RingoJS:

var he = require('he');

In Rhino:

load('he.js');

Using an AMD loader like RequireJS:

require(
  {
    'paths': {
      'he': 'path/to/he'
    }
  },
  ['he'],
  function(he) {
    console.log(he);
  }
);

Using as a CLI tool:

Install he using the -g global flag

npm i -g he

You will be then able to encode or decode HTML entities from the command line:

$ he --encode 'föo ♥ bår 𝌆 baz'
> föo ♥ bår 𝌆 baz

$ he --encode --use-named-refs 'föo ♥ bår 𝌆 baz'
> föo ♥ bår 𝌆 baz

$ he --decode 'föo ♥ bår 𝌆 baz'
> föo ♥ bår 𝌆 baz

Decoding Programmatically:

he.decode(html, options)

This function takes a string of HTML and decodes any named and numerical character references in it using the algorithm described in section 12.2.4.69 of the HTML spec.

he.decode('foo © bar ≠ baz 𝌆 qux');
// → 'foo © bar ≠ baz 𝌆 qux'