chrome/browser/net/predictor_tab_helper.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/net/predictor_tab_helper.h"
   6
   7 #include "base/command_line.h"
   8 #include "chrome/browser/net/predictor.h"
   9 #include "chrome/browser/profiles/profile.h"
  10 #include "chrome/common/chrome_switches.h"
  11 #include "chrome/common/url_constants.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "content/public/common/frame_navigate_params.h"
  14
  15 DEFINE_WEB_CONTENTS_USER_DATA_KEY(chrome_browser_net::PredictorTabHelper);
  16
  17 using content::BrowserThread;
  18
  19 namespace {
  20
  21 bool IsUserLinkNavigationRequest(content::PageTransition page_transition) {
  22   bool is_link = (content::PageTransitionStripQualifier(page_transition) ==
  23                   content::PAGE_TRANSITION_LINK);
  24   bool is_forward_back = (page_transition &
  25                           content::PAGE_TRANSITION_FORWARD_BACK) != 0;
  26   // Tracking navigation session including client-side redirect
  27   // is currently not supported.
  28   bool is_client_redirect = (page_transition &
  29                              content::PAGE_TRANSITION_CLIENT_REDIRECT) != 0;
  30   return is_link && !is_forward_back && !is_client_redirect;
  31 }
  32
  33 }  // namespace
  34
  35 namespace chrome_browser_net {
  36
  37 PredictorTabHelper::PredictorTabHelper(content::WebContents* web_contents)
  38     : content::WebContentsObserver(web_contents) {
  39 }
  40
  41 PredictorTabHelper::~PredictorTabHelper() {
  42 }
  43
  44 void PredictorTabHelper::DidStartNavigationToPendingEntry(
  45     const GURL& url,
  46     content::NavigationController::ReloadType reload_type) {
  47   Profile* profile =
  48       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
  49   chrome_browser_net::Predictor* predictor = profile->GetNetworkPredictor();
  50   if (!predictor)
  51     return;
  52   if (url.SchemeIs(content::kHttpScheme) || url.SchemeIs(content::kHttpsScheme))
  53     predictor->PreconnectUrlAndSubresources(url, GURL());
  54 }
  55
  56 void PredictorTabHelper::DidNavigateMainFrame(
  57     const content::LoadCommittedDetails& details,
  58     const content::FrameNavigateParams& params) {
  59   if (!IsUserLinkNavigationRequest(params.transition) ||
  60       !(params.url.SchemeIsHTTPOrHTTPS()))
  61     return;
  62
  63   Profile* profile = Profile::FromBrowserContext(
  64       web_contents()->GetBrowserContext());
  65   Predictor* predictor = profile->GetNetworkPredictor();
  66   if (predictor) {
  67     BrowserThread::PostTask(
  68         BrowserThread::IO,
  69         FROM_HERE,
  70         base::Bind(&Predictor::RecordLinkNavigation,
  71                    base::Unretained(predictor),
  72                    params.url));
  73   }
  74 }
  75
  76 }  // namespace chrome_browser_net