Is it possible to utilize Jsoup to extract specific portions of JavaScript code from a webpage?

I am looking to extract data from the following script:

$(document).ready(function(){ 
  $("#areaName").val(1);$("#state").val(29);$("#city").val(1);
  $("#subareaName").val(1);$("#lane").val(1);
}

Specifically, I need to retrieve values such as areaName = 1, state = 29, city = 1, subareaName = 1, lane = 1.

Can anyone guide me on how to achieve this using jsoup?

Answer №1

Jsoup serves as an HTML (XML) parser that allows you to extract JavaScript from a web page's source code. An example of how you can achieve this is by using the following code snippet:

Elements scripts = document.select("script");

After extracting the script, you will need to parse it yourself, which can be done using regular expressions. Below is an illustration:

    final String itemName = "productName";
    final String regex = "#" + itemName + ".*?value\\((.*?)\\)";
    final String scriptContent = "$(document).ready(function(){ \n"
            + "  $(\"#productName\").value(1);$(\"#category\").value(12);\n"
            + "}";
    
    final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
    final Matcher matcher = pattern.matcher(scriptContent);

    if (matcher.find() && matcher.groupCount() > 0) {
        String productName = matcher.group(1);
        System.out.println(itemName + ": " + productName);
    }

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