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jmeterhttp-post

JMeter: Passing an string in a request body based on a condition

I have a request, where I'm sending some values fetched from the response of the previous API calls, as strings within an array.

{"content_id":[${identifier_trending_INDIVIDUAL},${identifier_fetch_INDIVIDUAL},${identifier_interestBased_INDIVIDUAL}]}

If one of the variables doesn't have any value for e.g.: identifier_fetch_INDIVIDUAL is an empty string, I don't want to pass it. It should be included in the body of the request only when it has a value. Is it possible to achieve this using any preprocessor element?

Solution

  • You can achieve this using JSR223 PreProcessor and the following Groovy code:

    def payload = [:]

def content = []
content += vars.get('identifier_trending_INDIVIDUAL') ?: []
content += vars.get('identifier_fetch_INDIVIDUAL') ?: []
content += vars.get('identifier_interestBased_INDIVIDUAL') ?: []

payload.put('content_id', content)

vars.put('payload', new groovy.json.JsonBuilder(payload).toPrettyString())

    You can reference generated value in the HTTP Request sampler's body as ${payload}

    More information: