How to extract values from json in jmeter when the keys are unkown?

Question

I have a json response as, { \'sadasd123242\' : \'asdadada122dfsfs\', \'dadsadaskljk\' : \'adasdasdasdsadds\' } I want to extract the keys from the response in jmeter test u

Answer 1

Considering first value as key which is dynamic and second value you have to fetch.

You can use "Boundary extractor" post processor in that case by defining the left and right boundary as shown in the below image.

Check the below test for boundary expression to get the desired result:-

Hope this help.

Answer 2

Assuming you have the response in the following format:

{
  "data": {
    "assets": {
      "sadsad12dwqqwe": "asda1212312",
      "asdasd1213123": "asdas2131231"
    }
  }
}

You can extract key names using JSR223 PostProcessor and the following code:

new groovy.json.JsonSlurper().parse(prev.getResponseData()).data.assets.eachWithIndex{ def node, int idx ->
    log.info('Key ' + idx + '=' + node.getKey())
    vars.put('key_' + idx, node.getKey())
}

It will print key names into jmeter.log file and create JMeter Variables like:

- `${key_1}`
- `${key_2}`
- etc.

holding the required "key" values.

Demo:

References:

• Apache Groovy: Parsing and producing JSON
• Apache Groovy - Why and How You Should Use It