Syntax to use parameters in Body section of HTTP Request Sampler in JMeter, using Rest API POST request with body and input from CSV file

Question

I'm using JMeter to test a microservice and I need to use a parameter dynamically with a different value in each request. Also, the parameter is a part of a query that contains other constant values as well.

I defined user variables in the JMeter user.properties file (in JMeter bin folder):

JMeter -- bin/user.properties

# Parameters to use in JMeter
ES_HOST=127.0.0.1
ES_PORT=9200
ES_INDEX=segments
ES_TYPE=_doc
THREAD=5
CSVDATA_ROOT=C:/devtools/apache-jmeter-5.2.1/csv_data

Of course, I have User-Defined Variables:

And how my Test Plan is defined in JMeter

As you can see in the following screenshot of View Result Tree the parameter agentName I defined and shown in the HTTP Request (above) is working.

I want to define it in the body of the HTTP Request, to replace the hardcoded "John Doe" with a parameters that have a different value in each request.

"query":"SearchStartTime=2020-01-01 00:00:00.000TO2020-01-31 23:59:59.999&AgentName=John Doe"}

How can I do that? I need a way to add a parameter to an existing string

I've already tried Using Apache JMeter to Test Elasticsearch (or any REST API) and In Jmeter, What would be syntax of parameters in Body Data section of HTTP Request Sampler, for Rest APIs and input should be generated dynamically also doesn't solve my problem.

user7294900 user7294900 · Accepted Answer · 2020-02-16T12:18:47

Use same syntax as HTTP request - ${agentname} for getting variable value:

"query":"SearchStartTime=2020-01-01 00:00:00.000TO2020-01-31 23:59:59.999&AgentName=${agentname}"

Syntax to use parameters in Body section of HTTP Request Sampler in JMeter, using Rest API POST request with body and input from CSV file

1 Answers