Add custom interstitial for captive portals.

chrome/browser/ssl/ssl_error_handler.cc

+// Copyright 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/metrics/histogram.h"
+#include "base/time/time.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ssl/ssl_blocking_page.h"
+#include "chrome/common/chrome_version_info.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"
+#include "chrome/browser/captive_portal/captive_portal_tab_helper.h"
+#include "chrome/browser/ssl/captive_portal_blocking_page.h"
+#endif
+
+namespace {
+
+// Events for UMA.
+enum SSLErrorHandlerEvent {
+  HANDLE_ALL,
+  CAPTIVE_PORTAL_CHECK,
+  SHOW_CAPTIVE_PORTAL_INTERSTITIAL,
+  SHOW_CAPTIVE_PORTAL_INTERSTITIAL_OVERRIDABLE,
+  SHOW_SSL_INTERSTITIAL,
+  SHOW_SSL_INTERSTITIAL_OVERRIDABLE,
+  SSL_ERROR_HANDLER_EVENT_COUNT
+};
+
+void RecordUMA(SSLErrorHandlerEvent event) {
+  UMA_HISTOGRAM_ENUMERATION("interstitial.ssl_error_handler",
+                            event,
+                            SSL_ERROR_HANDLER_EVENT_COUNT);
+}
+
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+bool IsCaptivePortalInterstitialEnabled() {
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  return channel <= chrome::VersionInfo::CHANNEL_DEV;
+}
+#endif
+
+}  // namespace
+
+SSLErrorHandler::SSLErrorHandler(content::WebContents* web_contents,
+                                 int cert_error,
+                                 const net::SSLInfo& ssl_info,
+                                 const GURL& request_url,
+                                 const int options_mask,
+                                 const base::TimeDelta ssl_error_delay,
+                                 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),
+      options_mask_(options_mask),
+      callback_(callback),
+      ssl_interstitial_display_delay_(ssl_error_delay) {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  Profile* profile = Profile::FromBrowserContext(
+      web_contents_->GetBrowserContext());
+  registrar_.Add(this,
+                 chrome::NOTIFICATION_CAPTIVE_PORTAL_CHECK_RESULT,
+                 content::Source<Profile>(profile));
+#endif
+}
+
+SSLErrorHandler::~SSLErrorHandler() {
+}
+
+void SSLErrorHandler::HandleSSLError(
+    content::WebContents* web_contents,
+    int cert_error,
+    const net::SSLInfo& ssl_info,
+    const GURL& request_url,
+    int options_mask,
+    const base::Callback<void(bool)>& callback) {
+  // SSL interstitials aren't delayed if captive portal detection is disabled.
+  base::TimeDelta ssl_error_delay;
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  CaptivePortalTabHelper* captive_portal_tab_helper =
+      CaptivePortalTabHelper::FromWebContents(web_contents);
+  if (captive_portal_tab_helper) {
+    captive_portal_tab_helper->OnSSLCertError(ssl_info);
+    ssl_error_delay = captive_portal_tab_helper->GetSSLErrorDelay();

[mmenke, 2014/11/10 17:32:08]

I need to spend some time thinking about how to move this - I think as-is, this
is a layering violation.  Moving this class into the captive_portal directory
would fix that...But that also seems a little weird.

+  }
+#endif
+ (new SSLErrorHandler(web_contents, cert_error, ssl_info, request_url,

[mmenke, 2014/11/10 17:32:08]

nit:  +1 indent

[meacer, 2014/11/14 00:30:25]

Done.

+                      options_mask, ssl_error_delay, callback))->Handle();
+}
+
+void SSLErrorHandler::Handle() {
+  RecordUMA(HANDLE_ALL);
+
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  if (IsCaptivePortalInterstitialEnabled()) {
+    CheckForCaptivePortal();
+    timer_.Start(FROM_HERE, ssl_interstitial_display_delay_,
+                 base::Bind(&SSLErrorHandler::OnTimerExpired,
+                            base::Unretained(this)));
+    return;
+  }
+#endif
+  // Display an SSL interstitial.
+  ShowSSLInterstitial();
+}
+
+void SSLErrorHandler::CheckForCaptivePortal() {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  RecordUMA(CAPTIVE_PORTAL_CHECK);

[mmenke, 2014/11/10 17:32:08]

Do we get anything out of this histogram?  Basically just tells us if we're on
mobile or not.

[meacer, 2014/11/14 00:30:25]

Mostly convenience. With this one doesn't need to cross correlate multiple
histograms.

[meacer, 2014/11/14 00:31:32]

Actually, I'll probably delete this histogram.

+  Profile* profile = Profile::FromBrowserContext(
+      web_contents_->GetBrowserContext());
+  CaptivePortalService* captive_portal_service =
+      CaptivePortalServiceFactory::GetForProfile(profile);
+  captive_portal_service->DetectCaptivePortal();
+#endif
+}
+
+void SSLErrorHandler::ShowCaptivePortalInterstitial() {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  // Show captive portal blocking page. The interstitial owns the blocking page.
+  RecordUMA(SSLBlockingPage::IsOverridable(options_mask_) ?
+            SHOW_CAPTIVE_PORTAL_INTERSTITIAL_OVERRIDABLE :
+            SHOW_CAPTIVE_PORTAL_INTERSTITIAL);
+  (new CaptivePortalBlockingPage(web_contents_, request_url_))->Show();
+  delete this;
+#else
+  NOTREACHED();
+#endif
+}
+
+void SSLErrorHandler::ShowSSLInterstitial() {
+  // Show SSL blocking page. The interstitial owns the blocking page.
+  RecordUMA(SSLBlockingPage::IsOverridable(options_mask_) ?
+            SHOW_SSL_INTERSTITIAL_OVERRIDABLE :
+            SHOW_SSL_INTERSTITIAL);
+  (new SSLBlockingPage(web_contents_, cert_error_, ssl_info_, request_url_,
+                       options_mask_, callback_))->Show();
+  delete this;
+}
+
+void SSLErrorHandler::OnTimerExpired() {
+  ShowSSLInterstitial();
+}
+
+void SSLErrorHandler::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+#if defined(ENABLE_CAPTIVE_PORTAL_DETECTION)
+  if (type == chrome::NOTIFICATION_CAPTIVE_PORTAL_CHECK_RESULT) {
+    timer_.Stop();
+    CaptivePortalService::Results* results =
+        content::Details<CaptivePortalService::Results>(details).ptr();
+    if (results->result == captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL)
+      ShowCaptivePortalInterstitial();
+    else
+      ShowSSLInterstitial();
+  }
+#endif
+}
+
+void SSLErrorHandler::DidStartNavigationToPendingEntry(
+    const GURL& url,
+    content::NavigationController::ReloadType reload_type) {
+  delete this;
+}
+
+void SSLErrorHandler::DidStopLoading(
+    content::RenderViewHost* render_view_host) {
+  delete this;
+}
+
+void SSLErrorHandler::WebContentsDestroyed() {
+  delete this;
+}