phantomas/modules/mainRequest/mainRequest.js

Headless Chromium-based web performance metrics collector and monitoring tool

/**
 * Analyzes bits of data pertaining to the main request only
 */
"use strict";

module.exports = function (phantomas) {
  var isMainRequest = true;
  var statusCodes = [];

  phantomas.on("recv", function (entry, res) {
    if (isMainRequest) {
      captureStatusCode(statusCodes, res.status);
    }
  });

  phantomas.on("responseEnd", function (entry, res) {
    isMainRequest = false;
    captureStatusCode(statusCodes, res.status);

    phantomas.setMetric("statusCodesTrail", statusCodes.join(","), true); // @desc comma-separated list of HTTP status codes that main request followed through (could contain a single element if the main request is a terminal one) [string]
  });

  function captureStatusCode(codes, code) {
    codes.push(code);
  }
};