Getting http response code with Selenium and Expose Response Headers extension

README.md

Chrome Extension: https://chrome.google.com/webstore/detail/expose-response-headers/omlflgllokdkamhdgiaalffaeopelagg

selenium.example.js

// uses Expose Response Headers extension for Chrome
var builder = new selenium.Builder().withCapabilities(selenium.Capabilities.chrome());
var options = new selenium_chrome.Options();
options.addExtensions(__dirname + "/response-headers.crx");
builder.setChromeOptions(options);
var page = builder.build();
page.then(function() {
  page.get(url).then(function() {
    page.executeScript(function() {
      return {
        statusCode: navigator.responseStatusCode
      }
    }).then(function(obj) {
      // now you have obj.statusCode
    });
  }, function(err) {
    // error opening url
  });
}, function(err) {
  // error creating browser
});