title: Jmeter: Http POST request with body data and file upload
body: <p>I'm trying to test a Rest api which is working on postman but not on Jmeter, 
  the request takes (2 parameters):</p>
  
  <ul>
  <li>a pdf file </li>
  <li>a body data (json containing pdf information) </li>
  </ul>
  
  <p>on Postman : when I put the Content-Type = application/x-www-form-urlencoded, and I upload the json file and the pdf file it works
  but on jmeter I'm always getting errors such as "Unsupported Media Type"</p>