logging response from wrk

wrk_log.lua

wrk.path  = "/rest/ping"
wrk.method = "POST"
wrk.body   = "id=7579764573763278289&platformid=ANDROID&version=1.0.0"
wrk.headers["Content-Type"] = "application/x-www-form-urlencoded"
wrk.headers["deviceid"] = "354435052821931"
wrk.headers["Accept"] = "application/json"

logfile = io.open("wrk.log", "w");
local cnt = 0;

response = function(status, header, body)
     logfile:write("status:" .. status .. "\n");
     cnt = cnt + 1;
     logfile:write("status:" .. status .. "\n" .. body .. "\n-------------------------------------------------\n");
end

done = function(summary, latency, requests)
     logfile:write("------------- SUMMARY -------------\n")
     print("Response count: ", cnt)
     logfile.close();
end