Parse Function Inside Json

I have this JSON as a result of the function JSON.stringify(): {'get':'function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g[h];i.

Solution 1:

QUICK ANSWER:

The function bellow will do it:

function fix(obj){

    for (var propertyin obj) {
        if (obj.hasOwnProperty(property)) {
            obj[property] = eval("(" + obj[property] + ")");
        }
    }

}

If obj has your JSON parsed object then just do the following:

fix(obj);
console.log(obj); // in case you want to see the change in the console

EXPLANATION (IF YOU NEED ONE):

You will be able to get the javascript function expression if you enclose the string with parentheses '()' before invoking eval.

So the steps to achieve the desired result are:

1. Enclose the function expression string in parentheses (see footnotes for the reason why)
2. Invoke the eval function to evaluate the function declaration expression
3. Assign the function declaration expression to the same property that contained the string value

For the simplistic example you gave, you can get the desired results by:

var obj = {"get":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g

[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio=

{provider:a,tokens:b,request:c},e.http(i)}","post":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if

('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||

d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}"};

obj.get = eval("(" + obj.get + ")");
obj.post = eval("(" + obj.post + ")");

You can automate that by using the following function:

function fix(obj){

    for (var propertyin obj) {
        if (obj.hasOwnProperty(property)) {
            obj[property] = eval("(" + obj[property] + ")");
        }
    }

}

Your final code should be something like:

functionfix(obj){

        for (var property in obj) {
            if (obj.hasOwnProperty(property)) {
                obj[property] = eval("(" + obj[property] + ")");
            }
        }

    }


var obj = {"get":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if('object'==typeof g)for(h in g)i[h]=g

    [h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||d,i.oauthio=

    {provider:a,tokens:b,request:c},e.http(i)}","post":"function (f,g){'use strict';var h,i;if(i={},'string'==typeof f){if

    ('object'==typeof g)for(h in g)i[h]=g[h];i.url=f}else if('object'==typeof f)for(h in f)i[h]=f[h];return i.type=i.type||

    d,i.oauthio={provider:a,tokens:b,request:c},e.http(i)}"};

fix(obj);

---

Footnotes:

In case you have interest to know why the parentheses are needed please check the link below:

Why does JavaScript's eval need parentheses to eval JSON data?

Solution 2:

this solution is better than using eval :

let's say obj contains your json, which means the function is obj.get but it is a sting, to convert it to a real function, you can use the constructor Function

obj.get = newFunction(obj.get);

Note that I tried it on your code but the string you have posted has some errors on it. make sure your function is correct.