带有随机数量身体部位的加特林请求

Question

I want to test a HTTP upload API that accepts a list of files in a single request. I want to write a Gatling script that generates a request with a random number of body parts each time.

This is what I have:

feed(feeder)
  .exec(
    {
      var req = http("My request")
        .post("/${id}")
        .header("Content-Type", "multipart/mixed")

      1 to Random.nextInt(10) foreach {
        i => {
          req = req.bodyPart(
            ByteArrayBodyPart("file-put", session => randomByteArray(10 * 1024 + Random.nextInt(10 * 1024 * 1024)))
              .contentType("application/pdf")
              .fileName(session => s"/$i-UPLOAD-TEST.pdf")
          )
        }
      }
      req
    }
  )

private def randomByteArray(size: Int): Array[Byte] = {
    val bytes = new Array[Byte](size)
    Random.nextBytes(bytes)
    bytes
}

With every request the file sizes and contents are randomized, so the randomByteArray works fine. But each time I get the same number of body parts. I assume it's because the request "template" is generated at the start of the simulation, so the foreach loop runs only once and configures the number of body parts for all the future requests.

How can I make the number of body parts random each time?

Answer 1

您必须事先构建每个分支（一个用于一个部分，一个用于2，等等），然后随机切换 。