Obtaining a JSONArray using JavascriptExecutor

Is there a way to extract a JSONArray from JavascriptExecutor in Selenium? Normally, when I try to access it using "___grecaptcha_cfg.clients[0]" in Chrome's dev console, I get a result similar to this:

https://i.sstatic.net/X8BlS.png

However, when I attempt the following code snippet:

JavascriptExecutor js = (JavascriptExecutor) Browser;         
Object  o = (Object) js.executeScript("return ___grecaptcha_cfg.clients[0];");

I encounter an error:

Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: Maximum call stack size exceeded (Session info: chrome=69.0.3497.100) (Driver info: chromedriver=2.41.578737 (49da6702b16031c40d63e5618de03a32ff6c197e),
platform=Windows NT 6.1.7601 SP1 x86_64) (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 0 milliseconds

Any suggestions on how to resolve this issue?

Thank you

UPDATE

If I use the following code instead:

 Object o = (Object) js.executeScript("return ___grecaptcha_cfg.clients[0].Cy.C;");

I receive the desired output:

{action=null, badge=bottomright, bind=null, callback={}, content-binding=null, pool=null, preload=null, s=null, sitekey=flkgjsfldkjgsfdg, size=invisible, stoken=null, tabindex=null, theme=null, type=image}

The issue lies with the changing value of Cy.C. How can I handle this dynamically changing value?

Update 2

By using:

String script = "return JSON.stringify(___grecaptcha_cfg.clients[0]);";
String str = (String) js.executeScript(script);

I encounter the error message 

unknown error: Converting circular structure to JSON

It seems like I may be running into infinite recursion. Any advice on how to solve this problem? My goal is to parse out the value 'Cy.C' by identifying callback={} or sitekey={} within the object.

javascriptjavaseleniumcallbackselenium-chromedriver

Answer №1

To handle a complex return JSON object, one approach is to convert it into a string and then parse it back within the JAVA code.

String script = "return JSON.stringify(___grecaptcha_cfg.clients[0].Cy.C);";
String jsonString = (String) js.executeScript(script);

// Using JSON-Java library to convert JSON string to JSON Java Object.
//
//

Answer №2

The issue with the error message "unknown error: Maximum call stack size exceeded" was due to the complexity of the object I was searching for.

After noticing several unanswered posts about similar issues, I decided to share my solution:

String script = "for (var prop in ___grecaptcha_cfg.clients[0])"
               +"{"
               +" return '___grecaptcha_cfg.clients[0].' + prop"
               +"}";
System.out.println(script);
Object objects = (Object) js.executeScript(script);
System.out.printl(objects);

In this code snippet, I am only retrieving the first property from the object. It became apparent that unless I iterated through the entire object, I wouldn't get the correct order.

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