How to check if Gatling's session variable exists outside of exec block?

Gatling (Open-Source)
1

My case is quite simple. I have a REST call defined in Scala class - BackendApi:

def eventPathTreeCall(request: EventPathTreeRequestBuilder): HttpRequestBuilder = { val url = request.build() http(url).get(url).headers(httpGetHeaders()) }

This call is used by two scenarios - one simulating loading a webpage, and other just testing REST calls. Depending on which scenario is making the call, I need different request headers. For loading web page scenario I need to pass X-CSRF-TOKEN, but I do not want to send it when executing second scenario. What I wanted to achive, is to have an if statement, checking if csrf-token variable is defined in Gatling’s session. My first thought would be to use Gatling EL:

def httpGetHeaders(): Map[String, String] = { val map = collection.mutable.Map( "Etag" -> "", "X-Forwarded-For" -> "127.0.0.1", "X-Origin-Id" -> "3", "X-Requested-With" -> "XMLHttpRequest", "Pragma" -> "no-cache", "Cache-Control" -> "no-cache", "Connection" -> "keep-alive") if (!"${csrf-token.isUndefined()}".toBoolean)) map.put("X-CSRF-Token", "${csrf-token}") map.toMap }

Unfortunately it does not work, I get an exception about parsing boolean.

Caused by: java.lang.IllegalArgumentException: For input string: “${csrf-token.isUndefined()}”
So it is clear that Gatling’s expression is not evaluated. When I have created a var with headers, and tried to use expressions in it they were populated correctly:

val getHeaders = Map( "Etag" -> "", "X-CSRF-Token" -> "${csrf-token}", "X-Forwarded-For" -> "127.0.0.1", "X-Origin-Id" -> "3", "X-Requested-With" -> "XMLHttpRequest", "Pragma" -> "no-cache", "Cache-Control" -> "no-cache", "Connection" -> "keep-alive" )

If my idea is wrong, please tell me how to use session variable value outside of gatling exec blocks, and base test’s logic on these values in Scala code.

2

have you found any solution for this? i got the same problem :frowning:

3

${csrf-token.isUndefined() is only going to work in the context of one of the gatling dsl flow control statements (doIf / doIfOrElse …). You can’t just use it in a regular ‘if’ block as that block has no knowledge of the session or how to use it to resolve your variable.