How would I write regex to get the json out of this HTML script tag?

July 16, 2023

So I have this text that I extracted out of a <script> tag.

                                        function fbq_w123456as() {
                                                fbq('track', 'AddToCart', {
                                                contents: [
                                                {
                                                        'id': '123456',
                                                        'quantity': '',
                                                        'item_price':69.99                                                        }
                                                ],
                                                content_name: 'Stackoverflow',
                                                content_category: '',
                                                content_ids: ['w123456as'],
                                                content_type: 'product',
                                                value: 420.69,
                                                currency: 'USD'
                                                });
                                        }

I’m trying to extract this information using regex and later converting it into JSON using python.
I’ve tried re.search(r"'AddToCart', (.*?);" and a few other attempts but no luck. I am very new to regex and I am struggling with it.

{
    "contents":[
        {
            "id":"123456",
            "quantity":"",
            "item_price":69.99
        }
    ],
    "content_name":"Stackoverflow",
    "content_category":"",
    "content_ids":[
        "w123456as"
    ],
    "content_type":"product",
    "value":420.69,
    "currency":"USD"
}

How would I create the regex to extract the JSON data?

>Solution :

You can try:

import re
from ast import literal_eval

js_txt = """\
    function fbq_w123456as() {
            fbq('track', 'AddToCart', {
            contents: [
            {
                    'id': '123456',
                    'quantity': '',
                    'item_price':69.99                                                        }
            ],
            content_name: 'Stackoverflow',
            content_category: '',
            content_ids: ['w123456as'],
            content_type: 'product',
            value: 420.69,
            currency: 'USD'
            });
    }"""

out = re.search(r"'AddToCart', (\{.*?\})\);", js_txt, flags=re.S).group(1)
out = re.sub(r"""([^"'\s]+):""", r'"\1":', out)
out = literal_eval(out)
print(out)

Prints python dict:

{
    "contents": [{"id": "123456", "quantity": "", "item_price": 69.99}],
    "content_name": "Stackoverflow",
    "content_category": "",
    "content_ids": ["w123456as"],
    "content_type": "product",
    "value": 420.69,
    "currency": "USD",
}