Surface button for loading stale cache copy on net error page.

chrome/renderer/net/net_error_helper.cc

 // Copyright (c) 2013 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/renderer/net/net_error_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/localized_error.h"
 #include "chrome/common/net/net_error_info.h"
 #include "chrome/common/render_messages.h"
-#include "chrome/renderer/net/error_cache_load.h"
+#include "chrome/renderer/net/net_error_page_controller.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "content/public/renderer/resource_fetcher.h"
 #include "grit/renderer_resources.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 58 matching lines @@
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   bool auto_reload_enabled =
       command_line->HasSwitch(switches::kEnableOfflineAutoReload);
   core_.set_auto_reload_enabled(auto_reload_enabled);
 }
 
 NetErrorHelper::~NetErrorHelper() {
   RenderThread::Get()->RemoveObserver(this);
 }
 
+void NetErrorHelper::ReloadButtonPressed() {
+  core_.ExecuteButtonPress(NetErrorHelperCore::RELOAD_BUTTON);
+}
+
+void NetErrorHelper::LoadStaleButtonPressed() {
+  core_.ExecuteButtonPress(NetErrorHelperCore::LOAD_STALE_BUTTON);
+}
+
+void NetErrorHelper::MoreButtonPressed() {
+  core_.ExecuteButtonPress(NetErrorHelperCore::MORE_BUTTON);
+}
+
 void NetErrorHelper::DidStartProvisionalLoad() {
   blink::WebFrame* frame = render_frame()->GetWebFrame();
   core_.OnStartLoad(GetFrameType(frame), GetLoadingPageType(frame));
 }
 
 void NetErrorHelper::DidCommitProvisionalLoad(bool is_new_navigation) {
   blink::WebFrame* frame = render_frame()->GetWebFrame();
   core_.OnCommitLoad(GetFrameType(frame));
 }
 
@@ skipping 33 matching lines @@
 
 bool NetErrorHelper::ShouldSuppressErrorPage(blink::WebFrame* frame,
                                              const GURL& url) {
   return core_.ShouldSuppressErrorPage(GetFrameType(frame), url);
 }
 
 void NetErrorHelper::GenerateLocalizedErrorPage(
     const blink::WebURLError& error,
     bool is_failed_post,
     scoped_ptr<LocalizedError::ErrorPageParams> params,
+    bool* reload_button_shown,
+    bool* load_stale_button_shown,
     std::string* error_html) const {
   error_html->clear();
 
   int resource_id = IDR_NET_ERROR_HTML;
   const base::StringPiece template_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id));
   if (template_html.empty()) {
     NOTREACHED() << "unable to load template.";
   } else {
     base::DictionaryValue error_strings;
     LocalizedError::GetStrings(error.reason, error.domain.utf8(),
                                error.unreachableURL, is_failed_post,
-                               error.staleCopyInCache,
+                               error.staleCopyInCache && !is_failed_post,
                                RenderThread::Get()->GetLocale(),
                                render_frame()->GetRenderView()->
                                    GetAcceptLanguages(),
                                params.Pass(), &error_strings);
+    *reload_button_shown = error_strings.Get("reloadButton", NULL);
+    *load_stale_button_shown = error_strings.Get("staleLoadButton", NULL);
+
     // "t" is the id of the template's root node.
     *error_html = webui::GetTemplatesHtml(template_html, &error_strings, "t");
   }
 }
 
 void NetErrorHelper::LoadErrorPageInMainFrame(const std::string& html,
                                               const GURL& failed_url) {
   blink::WebView* web_view = render_frame()->GetRenderView()->GetWebView();
   if (!web_view)
     return;
   blink::WebFrame* frame = web_view->mainFrame();
   frame->loadHTMLString(html, GURL(kUnreachableWebDataURL), failed_url, true);
 }
 
-void NetErrorHelper::EnableStaleLoadBindings(const GURL& page_url) {
-  ErrorCacheLoad::Install(render_frame(), page_url);
+void NetErrorHelper::EnablePageHelperFunctions() {
+  NetErrorPageController::Install(render_frame());
 }
 
 void NetErrorHelper::UpdateErrorPage(const blink::WebURLError& error,
                                      bool is_failed_post) {
   base::DictionaryValue error_strings;
   LocalizedError::GetStrings(error.reason,
                              error.domain.utf8(),
                              error.unreachableURL,
                              is_failed_post,
-                             error.staleCopyInCache,
+                             error.staleCopyInCache && !is_failed_post,
                              RenderThread::Get()->GetLocale(),
                              render_frame()->GetRenderView()->
                                  GetAcceptLanguages(),
                              scoped_ptr<LocalizedError::ErrorPageParams>(),
                              &error_strings);
 
   std::string json;
   JSONWriter::Write(&error_strings, &json);
 
   std::string js = "if (window.updateForDnsProbe) "
@@ skipping 32 matching lines @@
 }
 
 void NetErrorHelper::CancelFetchNavigationCorrections() {
   correction_fetcher_.reset();
 }
 
 void NetErrorHelper::ReloadPage() {
   render_frame()->GetWebFrame()->reload(false);
 }
 
+void NetErrorHelper::LoadPageFromCache(const GURL& page_url) {
+  blink::WebFrame* web_frame = render_frame()->GetWebFrame();
+  DCHECK(!EqualsASCII(web_frame->dataSource()->request().httpMethod(), "POST"));
+
+  blink::WebURLRequest request(page_url);
+  request.setCachePolicy(blink::WebURLRequest::ReturnCacheDataDontLoad);
+
+  web_frame->loadRequest(request);
+}
+
 void NetErrorHelper::OnNetErrorInfo(int status_num) {
   DCHECK(status_num >= 0 && status_num < chrome_common_net::DNS_PROBE_MAX);
 
   DVLOG(1) << "Received status " << DnsProbeStatusToString(status_num);
 
   core_.OnNetErrorInfo(static_cast<DnsProbeStatus>(status_num));
 }
 
 void NetErrorHelper::OnSetNavigationCorrectionInfo(
     const GURL& navigation_correction_url,
@@ skipping 15 matching lines @@
   if (!response.isNull() && response.httpStatusCode() == 200) {
     core_.OnNavigationCorrectionsFetched(
         data, render_frame()->GetRenderView()->GetAcceptLanguages(),
         LocaleIsRTL());
   } else {
     core_.OnNavigationCorrectionsFetched(
         "", render_frame()->GetRenderView()->GetAcceptLanguages(),
         LocaleIsRTL());
   }
 }