vegeta encode
を使えばOK
bodyにはbase64された値が入ってる
$ echo 'GET https://httpbin.org/get' | vegeta attack -rate=1 -duration=1s | vegeta encode | jq
{
"attack": "",
"seq": 0,
"code": 200,
"timestamp": "2023-02-28T11:10:17.173759917+09:00",
"latency": 1229773750,
"bytes_out": 0,
"bytes_in": 298,
"error": "",
"body": "ewog...",
"method": "GET",
"url": "https://httpbin.org/get",
"headers": {
"Content-Length": [
"298"
],
...