How can I extract request body data in JMeter?

In JMeter, request body data can be extracted using either the Regular Expression Extractor or the JSON Extractor.

Option 1: Method 1: Utilizing a regular expression extractor

1. Add a regular expression extractor to the HTTP request.
2. Set the relevant parameters in the regular expression extractor, such as “reference name”, “regular expression”, and “template”.
3. Use the regular expression extractor to extract variable names referenced in the “Body Data” field of HTTP requests, such as ${variable}.

Option 2: Utilize a JSON extractor.

1. Add a JSON extractor to the HTTP request.
2. Use a JSONPath expression in the “Body data” field of an HTTP request to extract data, such as $.path.to.data.
3. Set relevant parameters in the JSON extractor, such as “Reference name” and “JSONPath expression”.

Please note to choose the appropriate extraction method and corresponding variable reference based on the format and content of the request body data.