Utilize Regex to isolate text between specified string markers

I am attempting to scrape a website and I need to extract the JSON data from the data variable in the JavaScript code below using Python Regex.

<script type="text/javascript">
P.when('A').register("ImageBlockATF", function(A){
    var data = {
                'colorImages': { 'initial': [{"hiRes":"https://images-na.ssl-images-amazon.com/images/I/81Oo79kGp2L._SL1500_.jpg","thumb":"https://images-na.ssl-images-amazon.com/images/I/41SnVVzKChL._SS40_.jpg","large":"https://images-na.ssl-images-amazon.com/images/I/41SnVVzKChL.jpg","main":{"https://images-na.ssl-images-amazon.com/images/I/81Oo79kGp2L._SY355_.jpg":[355,270],"https://images-na.ssl-images-amazon.com/images/I/81Oo79kGp2L._SY450_.jpg":[450...

The regex I have been trying is not producing the desired results. Here is what I have attempted so far:

(var\s+data\s+=).*^[A.trigger('P.AboveTheFold')]$

In essence, I am seeking a regex pattern that will capture the text situated between var data = and A.trigger('P.AboveTheFold').

pythonregexweb-scraping

Answer №1

Make sure that your json data does not contain any instances of ;, and then you can use the following code:

var info\s*=\s*([^;]*});

While this method may not be very robust, it is still advised to utilize a parsing library for better results. The json data will be located within the 1st group.

Check it out here.

If you are certain that your data falls between var info = and A.trigger('Y.TopOfPage'), you can implement the following:

(?<=var info = ).*(?=A.trigger\('Y\.TopOfPage'\))

Explore it further there.

The entirety of the json data will be captured with this approach, thanks to positive lookarounds. Keep in mind that this method is also not foolproof – any variance in spacing between data and = could potentially cause issues. To work around this, consider using the re.DOTALL flag in Python to ensure that . includes newlines.

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