Question 181390 in Json Question posted in
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Json – How to maintain types of values when extracting keys and values from a JavaScript object in Python?

I am using Python. I need to gather the content of js object while maintaining the values’ type.

for example I have a js file with the next content

const rules = {
    force_update_cache: true,
    country: 'gb',
    override_headers: {
      'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1',
    },
    navigate_opt: {wait_until: ['domcontentloaded'], timeout: 60*SEC},
}

I want to extract the keys and values of rules while maintaining the original type of the values.

I regexed my way to read only the keys and values without the "const rules {, }".
I tried using ast.literal_eval but it doesn’t work propely.

I expect to get evantually a dictionary with the keys, and values with their original type.

string.
number.
integer.
object.
array.
boolean.
null.

Is there a solution for that?

Tags:

2

Answers


  1. 0

    use the vm module in Node.js to execute the JavaScript code and access the resulting object.

    const vm = require('vm');

const script = `
const rules = {
force_update_cache: true,
country: 'gb',
override_headers: {
'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) 
AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 
Safari/602.1',
},
navigate_opt: {wait_until: ['domcontentloaded'], timeout: 60*SEC},
};

rules;
`;

const sandbox = { SEC: 1 }; // Define any variables needed in the code

const context = vm.createContext(sandbox);
const result = vm.runInContext(script, context);

console.log(result);
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  2. 0

    maybe you can try this

    const rules = {
  force_update_cache: true,
  country: 'gb',
  override_headers: {
    'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1',
  },
  navigate_opt: {wait_until: ['domcontentloaded'], timeout: 60*SEC},
};

// Convert the object to a string
const rulesString = JSON.stringify(rules);

// Remove the surrounding braces to get the object literal
const objectLiteral = rulesString.slice(1, -1);

// Use eval() to parse the object literal
const parsedObject = eval('(' + objectLiteral + ')');

console.log(parsedObject);
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