Access the jwt token from multiple threads

Question

I Have API's to retrieve the token and get Positions nested under Token Generator and API Group threads.

I need to retrieve token only once and set the token to the property and access it across multiple threads.

Reponse from the post request:

{"token":"eyJhbGciOiJIUzUxMddiJ9.eyJ1c2VyX25hbWUiOiJhZG1pbiIsImxhc3RfbmFtZSI6ImFkbWluIiwiZmlyc3RfbmFtZSI6ImFkbWluIiwidXNlcl9pZCI6OCwicm9sZSI6IkFETUlOIiwiaWF0IjoxNTg2NDQ3MTc2LCJleHAiOjE1OssdDY1MzM1NzZ9.Q9-DT0q7uR53prnZFw1cTFIAlhqzj-qzNwr3qCbFn5B4irAxkR469aGxQK5VhvfEoPk4R_jZwyOpERzmVcRI6A"}

JSON Extractor in Token Generator thread

BeanShell PostProcessor in Token Generator thread

props.put("token", jwt_token); 

HTTP Header Manager in API Group thread

Authorization : Bearer ${__P(token)}

but my request headers in second API:

Authorization: Bearer 1

What am i missing here?

Answer 1

You need to update your code in Beanshell Post Processor.

props.put("token", jwt_token); 

You are trying to set a variable value in a property, but from the code, you have provided you are using jwt_token which is not the value extracted. You should update your code as below -

props.put("token", vars.get("jwt_token")); 

Answer 2

1. Don't use Beanshell, starting from JMeter 3.1 you should be using JSR223 Test Elements and Groovy language for scripting

2. You can avoid this JSON Extractor bit and perform the extraction of the JWT token and storing it into a JMeter property in a single line of code to wit:

   props.put('token', new groovy.json.JsonSlurper().parse(prev.getResponseData()).token)
   

More information:

• Apache Groovy - Parsing and producing JSON
• Apache Groovy - Why and How You Should Use It