Entering password characters in JMeter based on captcha request

Question

Are there any techniques that can be used to log in to a website with JMeter, when you are asked for the x,y,z characters of the password?

edit: a little more info: I'm recording HTTP requests, and for our local environment you just login with the password, which works fine. For the "live" site it asks for random different characters.

Answer 1

In order to implement what you want you have to proceed this way:

• Extract from the page that ask the 3 characters using either Regular_Expression_Extractor , CSS/JQuery Extractor or JSON Extractor. This will create for example 2 variables start and end

• Then add a JSR223 Post Processor using Groovy to extract the characters required from the password, example:

def start = vars["start"];
def end = vars["end"];
def password = vars["password"]; // This can come from a CSV or be hard coded if it does not change
vars.put("passwordExtract", password.substring(start, end));

• You can then use ${passwordExtract} to input the value in next request