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javascriptdynamicjmeter

How to capture dynamic values created using javascript in jmeter

I am trying to run a JMeter script but it is failing at login. The reason is, password is getting encrypted using RSA algorithm and that is using javascript. so the password that is saved at the time of recording wont work and I am not able to get the dynamic value of encrypted password as it is being encrypted using javascript which is not supported by JMeter. because of javascript usage at runtime, I can not use regular expression to look in response data as this is not part of response.

I am trying to login to Tableau reporting server.

Solution

  • I had the same problem using NEOLOAD, so I included the following script before the Auth POST.

    // Get variable value from VariableManager
var doLoginIDString = context.variableManager.getValue("doLoginID");
if (doLoginIDString==null) {
    context.fail("Variable 'doLoginID' not found");
}

logger.debug("doLoginIDString="+doLoginIDString);

var rsa = new RSAKey();
rsa.setPublic(doLoginIDString,'10001');
var res = rsa.encrypt('<USER_PASSWORD>');
logger.debug("encrypted_var= "+res);
if (res) {
     context.variableManager.setValue("crypted_Password",res);
}

    VariableManager is a NEOLOAD variable Manager :)

    "doLoginID" is a variable I created based on a string which is passed by the server for you to encript with your password. This string can be found in LoginPage's source code.

    "crypted_Password" is a variable I created for POST crypted parameter.

    RSAKey(), setPublic() and encrypt() are included in .js files you download from the server when you access login page. I just include those files in to my project's library and it worked.

    I don't know if with JMeter is the same, but hope this helps you to understand what you need to do.