chrome/browser/page_load_metrics/observers/google_captcha_observer.cc

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/page_load_metrics/observers/google_captcha_observer.h"

#include "base/metrics/histogram_macros.h"
#include "base/strings/string_util.h"
#include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
#include "chrome/common/page_load_metrics/page_load_timing.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"

namespace google_captcha_observer {

namespace {

const char kGoogleCaptchaEvents[] = "PageLoad.Clients.GoogleCaptcha.Events";

enum GoogleCaptchaEvent {
  // A Google CAPTCHA page was shown to the user.
  GOOGLE_CAPTCHA_SHOWN,
  // A Google CAPTCHA page was solved by the user.
  GOOGLE_CAPTCHA_SOLVED,
  // Add new values before this final count.
  GOOGLE_CAPTCHA_EVENT_BOUNDARY,
};

void RecordGoogleCaptchaEvent(GoogleCaptchaEvent event) {
  UMA_HISTOGRAM_ENUMERATION(
      kGoogleCaptchaEvents, event,
      GOOGLE_CAPTCHA_EVENT_BOUNDARY);
}

}  // namespace

bool IsGoogleCaptcha(const GURL& url) {
  return (base::StartsWith(url.host_piece(), "ipv4.google.",
                           base::CompareCase::SENSITIVE)
          || base::StartsWith(url.host_piece(), "ipv6.google.",
                              base::CompareCase::SENSITIVE))
      && base::StartsWith(url.path_piece(), "/sorry",
                          base::CompareCase::SENSITIVE);
}

GoogleCaptchaObserver::GoogleCaptchaObserver() {}

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
GoogleCaptchaObserver::OnCommit(content::NavigationHandle* navigation_handle) {
  if (!navigation_handle->IsSamePage()
      && IsGoogleCaptcha(navigation_handle->GetURL())) {
    RecordGoogleCaptchaEvent(GOOGLE_CAPTCHA_SHOWN);
  }
  return CONTINUE_OBSERVING;
}

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
GoogleCaptchaObserver::OnRedirect(
    content::NavigationHandle* navigation_handle) {
  if (IsGoogleCaptcha(navigation_handle->GetReferrer().url)) {
    RecordGoogleCaptchaEvent(GOOGLE_CAPTCHA_SOLVED);
    return STOP_OBSERVING;
  }
  return CONTINUE_OBSERVING;
}

}  // namespace google_captcha_observer