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

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