import (
    "http"
    "moul.io/http2curl"
)

data := bytes.NewBufferString(`{"hello":"world","answer":42}`)
req, _ := http.NewRequest("PUT", "http://www.example.com/abc/def.ghi?jlk=mno&pqr=stu", data)
req.Header.Set("Content-Type", "application/json")

command, _ := http2curl.GetCurlCommand(req)
fmt.Println(command)
// Output: curl -X PUT -d "{\"hello\":\"world\",\"answer\":42}" -H "Content-Type: application/json" http://www.example.com/abc/def.ghi?jlk=mno&pqr=stu