Add custom interstitial for captive portals.

chrome/browser/ssl/ssl_error_handler.cc

+// Copyright (c) 2014 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/ssl/ssl_error_handler.h"
+
+#include "base/time/time.h"
+#include "base/timer/timer.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ssl/captive_portal_blocking_page.h"
+#include "chrome/browser/ssl/ssl_blocking_page.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/browser/web_contents.h"
+
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+#include "chrome/browser/captive_portal/captive_portal_service.h"
+#include "chrome/browser/captive_portal/captive_portal_service_factory.h"
+#endif
+
+// The delay before displaying the SSL interstitial, during which we wait for a
+// captive portal result.
+const int kDefaultSSLInterstitialDisplayDelay = 2;
+
+SSLErrorHandler::SSLErrorHandler(content::WebContents* web_contents,
+                                 int cert_error,
+                                 const net::SSLInfo& ssl_info,
+                                 const GURL& request_url,
+                                 bool overridable,
+                                 bool strict_enforcement,
+                                 const base::Callback<void(bool)>& callback)
+    : content::WebContentsObserver(web_contents),
+      web_contents_(web_contents),
+      cert_error_(cert_error),
+      ssl_info_(ssl_info),
+      request_url_(request_url),
+      overridable_(overridable),
+      strict_enforcement_(strict_enforcement),
+      callback_(callback),
+      captive_portal_detection_enabled_(false),
+      handled_(false),
+      ssl_interstitial_display_delay_(
+          base::TimeDelta::FromSeconds(kDefaultSSLInterstitialDisplayDelay)) {
+}
+
+SSLErrorHandler::~SSLErrorHandler() {
+}
+
+void SSLErrorHandler::Handle() {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  CheckForCaptivePortal();
+  timer_.Start(FROM_HERE, ssl_interstitial_display_delay_,
+               base::Bind(&SSLErrorHandler::OnTimerExpired,
+                          base::Unretained(this)));
+#else
+  ShowSSLInterstitial();
+#endif
+}
+
+void SSLErrorHandler::CheckForCaptivePortal() {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  Profile* profile = Profile::FromBrowserContext(
+      web_contents_->GetBrowserContext());
+  CaptivePortalService* captive_portal_service =
+      CaptivePortalServiceFactory::GetForProfile(profile);
+  captive_portal_detection_enabled_ = captive_portal_service->enabled();
+  captive_portal_service->DetectCaptivePortal();
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_CAPTIVE_PORTAL_CHECK_RESULT,
+                 content::Source<Profile>(profile));
+#endif
+}
+
+void SSLErrorHandler::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  // TODO(meacer): Refactor this method in SSLBlockingPage.
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  // When detection is disabled, captive portal service always sends
+  // RESULT_INTERNET_CONNECTED. Ignore any probe results in that case.
+  if (!captive_portal_detection_enabled_)
+    return;

[mmenke, 2014/06/17 19:17:03]

Why is this needed?  Doesn't look like we're recording histograms, so we're just
do nothing, anyways, in that case.

[meacer, 2014/06/18 21:23:08]

Done.

+  if (type == chrome::NOTIFICATION_CAPTIVE_PORTAL_CHECK_RESULT) {
+    CaptivePortalService::Results* results =
+        content::Details<CaptivePortalService::Results>(details).ptr();
+    bool captive_portal_detected =
+        (results->result == captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL);
+    if (captive_portal_detected)
+      OnCaptivePortalResult();

[mmenke, 2014/06/17 19:17:03]

Think it's a little weird that we just always wait for the timer if no captive
portal is enabled.

[meacer, 2014/06/18 21:23:08]

If portal detection isn't enabled, we immediately show the ssl interstitial
without firing a timer, and Observe wouldn't get called at all since we won't
listen for any notifications.

+  }
+#endif
+}
+
+void SSLErrorHandler::OnCaptivePortalResult() {
+  if (handled_ || !timer_.IsRunning())
+    return;
+  timer_.Stop();
+  ShowCaptivePortalInterstitial();
+  handled_ = true;
+}
+
+void SSLErrorHandler::OnTimerExpired() {
+  if (handled_)
+    return;
+  ShowSSLInterstitial();
+  handled_ = true;
+}
+
+void SSLErrorHandler::ShowCaptivePortalInterstitial() {
+  // Show captive portal blocking page. The interstitial owns the blocking page.
+  new CaptivePortalBlockingPage(web_contents_, request_url_);
+}
+
+void SSLErrorHandler::ShowSSLInterstitial() {
+  // Show SSL blocking page. The interstitial owns the blocking page.
+  new SSLBlockingPage(web_contents_, cert_error_, ssl_info_, request_url_,
+                      overridable_, strict_enforcement_, callback_);
+}
+
+void SSLErrorHandler::DidStopLoading(
+    content::RenderViewHost* render_view_host) {
+  timer_.Stop();
+  delete this;
+}
+
+void SSLErrorHandler::WebContentsDestroyed() {
+  timer_.Stop();
+  delete this;
+}