Btukfyl

I need to benchmark our system with wrk and I ran into a problem. How can I chain requests in wrk with lua?

Scenario

• Login and get access token (code below)


• GET data from X endpoint (using access token from login step)


• GET data from Y endpoint (using access token from login step)

Lua script:

json = require "json"

log = require "log"



counter=100



access_token = ""



request = function() 

    path="/api/v1/auth"

    wrk.headers["x-auth-devicemetadata"] = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"

    wrk.headers["x-auth-user"] = "test_user_"..counter

    wrk.headers["x-auth-pass"] = "test_password"

    wrk.headers["Content-Type"] = "application/json"

    wrk.headers["x-auth-deviceuid"] = "test:chrome"

    counter = counter + 1

    return wrk.format("POST", path, headers)

end



response = function(status, headers, body)

    if status >= 400 then

        log.debug("user id: "..counter)

        log.debug("https status": ..status)

        log.debug("Error body: "..body)

        return

    end



    if status == 200 then

        log.debug("Successfull: "..body)

        log.debug("User: "..counter)

        autorization = json.decode(body)

        access_token = autorization["access_token"]

    end

end 



.....

# GET data from X endpoint

# GET data from Y endpoint

My main question is how to chain requests in wrk script using lua and pass data between?