Executing JavaScript in HttpClient or HtmlUnitHow to trigger javascript in HttpClient or HtmlUnit

Currently, I am using the HttpClient POST method to perform a specific action on a website. This involves using Javascript for an ajax connection which generates a unique requestID in the form of

var reqID = Math.floor(Math.random()*1000001);
. I need to access this reqID in order to successfully carry out the action. Can anyone provide guidance on how to access Javascript in HttpClient? Alternatively, is it possible to access the reqID variable using HtmlUnit?

The Javascript code snippet includes:

ajaxConnection.prototype.execute = function() {
    var reqID = Math.floor(Math.random()*1000001);
    var params = "reqID=" + reqID ;
    for (var key in this.connection_parameters) {
        params += "&" + key + "=" + this.connection_parameters[key];
    }

I am making a POST request to achieve the desired action like so:

String Src = PageSource_Post("http://www.example.com/ajax/ratingClient.php", new String[][]{{"reqID",""},{"id", "329602"},{"cmd", "rate"},{"rating", "2"},}, null);

At present, the reqID field is left blank while other parameters are obtained from the page source. Additionally, I am exploring the use of HtmlUnit:

webClient.setJavaScriptEnabled(true);
HtmlPage firstPage = webClient.getPage("http://www.example.com/");
HTMLScriptElement script = new HTMLScriptElement();

From this point onward, how can I access the specific reqID variable?

Answer №1

Are you referring to the web browser?

For Firefox, you can use Firebug and for IE, press F12

Utilizing these debugging tools will assist you in troubleshooting JavaScript errors. Set breakpoints in your code and run it step by step to monitor the value of your reqID.

Answer №2

Are you looking to run JavaScript from Java? Personally, I have found that HTMLUnit and HTTPUnit's support for JavaScript is somewhat lacking. In similar situations, we have had great success using Selenium. You can easily create test cases with the Selenium IDE, a Firefox plugin (http://docs.seleniumhq.org/projects/ide/). This tool enables you to record your actions in Firefox and export them as JUnit tests. Check out this helpful guide for more information:

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