JMeter authenticity token with Rails App

Question

I am trying to do a JMeter post operation to a simle rails app but I am getting the following back:

Started POST "/flights/" for 127.0.0.1 at 2015-05-04 12:40:15 -0700 Processing by FlightsController#create as HTML Parameters: {"authenticity_token"=>"$(LOGIN_AUTH_TOKEN)"} Can't verify CSRF token authenticity Completed 422 Unprocessable Entity in 3ms (ActiveRecord: 0.0ms)

I have implemented the suggestion about creating a regular expression extractor for the authenticity login as shown here:

and here is the http request:

Any help appreciated and thanks in advance, Slavko

Answer 1

• Move the Regular Expression Extractor as the child element of the first HTTP Request.
• Regular expression could be name=authenticity_token type=hidden value=(.*?)"
• In the next request, access authenticity_token by using ${LOGIN_AUTH_TOKEN} (Not by $(LOGIN_AUTH_TOKEN))