gatling & elastic : invalid basic authentication header encoding - scala

Question

here is my problem. I can't seem to use gatling for aggregation. I have this error: "invalid basic authentication header encoding" HTTP code 401.
here is my simplified code:
package app
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._
import java.util.Base64
class Aggregation extends Simulation {
val httpConf = http
.baseUrl("http://localhost:9200")
.acceptHeader("text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
val body = StringBody("""{
"aggs": {
"genres": {
"terms": { "field": "genre" }
}
}
}""".stripMargin.replaceAll("\n", " "))
// surely here there is an error but I don't know why
val auth = Base64.getEncoder.encodeToString("elastic:changeme".getBytes())
val scn = scenario("Test aggregation")
.exec(
http("Aggregation")
.get("/_search")
.header("Authorization", "Basic " + auth)
.body(body).asJson
.check(status.is(200)))
var users: Integer = 1
var duration: Integer = 1
setUp(
scn.inject(rampUsers(users) during (duration seconds))
).protocols(httpConf)
}

Answer 1

If your auth scheme is really Basic, you should use Gatling's built-in support instead of crafting the header yourself, see https://gatling.io/docs/gatling/reference/current/http/request/#authentication
http("Aggregation")
.get("/_search")
.basicAuth("elastic", "changeme")
.body(body).asJson
.check(status.is(200)))