How can i convert Json request to base 64 in JMeter Preprocessor

Question

I have a following Json

Ex : var Jsonfile = [ { "value": "3", "type" : "string", "label: "Repaymentday" },

{ "value": "3", "type" : "string", "label: "Repaymentday" }, ];

i need to store all this requests in a single variable and i need to convert those values as Base64. i am adding all this request in Preprocessor and i need to pass this variable into JMeter request(as base64 value). Could someone please how to achieve this in JMeter

Answer 1

1. There is __base64Encode() function available in Custom JMeter Functions bundle (can be installed using JMeter Plugins Manager) which can perform the encoding of arbitrary text (or JMeter Variable)

   ${__base64Encode(foo,)}
   

2. If you don't want or cannot use JMeter Plugins you can do the same using JMeter's built-in __groovy() function like:

   ${__groovy('foo'.bytes.encodeBase64().toString(),)}
   

Replace foo with the actual text you want to encode and that would be it