How to save response in a variable in jmeter

Question

I am performing load testing on my server using jmeter. In one of my post requests, I receive a unique id in the response. I need to send this id as a parameter in the following post requests. I am new to jmeter and don't have any idea how to do this. Help would be really appreciated.

Answer 1

If you need to store the whole response into a variable - take the following steps:

1. Add Beanshell PostProcessor as a child of the request which returns response you're looking for

2. Put the following line into the PostProcessor's "Script" area:

   vars.put("response", new String(data));
   

3. Refer extracted value as ${response} where required

   See How to Use BeanShell: JMeter's Favorite Built-in Component guide to lean more about Beanshell scripting in JMeter

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Alternatively you can do the same with the Regular Expression Extractor, in that case relevant configuration will be:

• Reference Name: response
• Regular Expression: (?s)(^.*)
• Template: $1$

If you need a part of response, not the whole response you can amend Regular Expression according to your needs as per Regular Expressions chapter of JMeter's User Manual