Jmeter: JSON response manipulation and passing to the next http request - json

Question

I've got the response from HTTP GET request as JSON file and I want to use that JSON and pass it to the next HTTP request. I got the following response data
{
"apiInfo": {
"id": "23143",
"name": "bookkeeping",
"state": "used",
"data": "15893712000000"
},
"apiDetails": [
{
"bookName": "abc",
"state": "old",
"noOfTimesUsed": "53"
"additionalParam"{
"name": "abc",
"id": "123"
}
},
{
"bookName": "def",
"state": "new",
"noOfTimesUsed": "5",
"action": "keep"
"additionalParam"{
"name": "def",
"id": "456"
}
},
{
"bookName": "xyz",
"state": "avg",
"noOfTimesUsed": "23"
"additionalParam"{
"name": "ghi",
"id": "789"
}
},
{
"bookName": "pqr",
"state": "old",
"noOfTimesUsed": "75",
"action": "discard"
"additionalParam"{
"name": "jkl",
"id": "012"
}
}
]
}
I want to use "apiInfo" & "apiDetails" part from the JSON response and manipulate its data. As you can notice, some array field have attribute "action" in it and some one doesn't. I want to make sure all the field in the array have this data and is assigned as ' "action":"keep" '. Also, I want to add "id" from apiInfo & "name" from additionalParams from apiDetails itself. The end result I want is somewhat like this
"apiDetails": [
{
"id": "23143",
"bookName": "abc",
"state": "old",
"noOfTimesUsed": "53",
"action": "keep",
"name":"abc"
},
{
"id": "23143",
"bookName": "def",
"state": "new",
"noOfTimesUsed": "5",
"action": "keep",
"name":"def"
},
{
"id": "23143",
"bookName": "xyz",
"state": "avg",
"noOfTimesUsed": "23",
"action": "keep",
"name":"ghi"
},
{
"id": "23143",
"bookName": "pqr",
"state": "old",
"noOfTimesUsed": "75",
"action": "keep",
"name":"jkl"
}
]
I've been trying to use JSR223 sampler and have been struggling with it. It's bit complicated and I need help. P.S.: I've tried using javascript code to manipulate the results as desired but have been unsuccessful.
Please help.
Thanks, Sid

Answer 1

Add JSR223 PostProcessor as a child of the request which returns the above JSON
Put the following code into "Script" area:
def apiDetails = new groovy.json.JsonSlurper().parse(prev.getResponseData()).apiDetails
apiDetails.each { apiDetail ->
apiDetail.put('action', 'keep')
}
vars.put('request', new groovy.json.JsonBuilder(apidetails: apiDetails.collect()).toPrettyString())
That's it, you should be able to refer the generated request as ${request} where required
More information:
Apache Groovy - Parsing and producing JSON
Apache Groovy - Why and How You Should Use It