jmeter testcases which can handle captcha?

Question

We are trying to build a jmeter testcase which does the following:

• login to a system
• obtain some information and check whether correct.

Answer 1

I was able to solve it myself. The solution is as follows:

• Create a Beanshell Sampler

In it, the following code displays the captcha and waits for user input

filenameOrURL = new URL("${captchaimage}");
image = Toolkit.getDefaultToolkit().getImage(filenameOrURL);
Icon icon = new javax.swing.ImageIcon(image);

JOptionPane pane = new JOptionPane("Enter Captcha", 0, 0, null);
String captcha = pane.showInputDialog(null, "Captcha", "Captcha", 0, icon, null, null);

Then we can use the captcha variable in any way we want. Thank you everyone who tried to help.

Answer 2

Since CAPTHA used to detect non-humans, JMeter will always fail it.

You have to make a workaround in your software: either disable captcha requesting or print somewhere on page correct captcha. Of course, only for JMeter tests.

Answer 3

Dirty workaround? Print the captcha value in alt image for the tests. And then you can retrieve the value and go on.