chrome/browser/apps/ephemeral_app_throttle.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/apps/ephemeral_app_throttle.h"
   6
   7 #include "base/command_line.h"
   8 #include "chrome/browser/apps/ephemeral_app_launcher.h"
   9 #include "chrome/browser/extensions/extension_service.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/browser/profiles/profile_io_data.h"
  12 #include "chrome/common/chrome_switches.h"
  13 #include "components/crx_file/id_util.h"
  14 #include "components/navigation_interception/intercept_navigation_resource_throttle.h"
  15 #include "components/navigation_interception/navigation_params.h"
  16 #include "content/public/browser/browser_thread.h"
  17 #include "content/public/browser/resource_throttle.h"
  18 #include "content/public/browser/web_contents.h"
  19 #include "extensions/browser/extension_system.h"
  20 #include "extensions/common/extension_urls.h"
  21 #include "net/url_request/url_request.h"
  22
  23 using content::BrowserThread;
  24 using content::WebContents;
  25 using extensions::Extension;
  26
  27 namespace {
  28
  29 bool LaunchEphemeralApp(
  30     const std::string& app_id,
  31     content::WebContents* source,
  32     const navigation_interception::NavigationParams& params) {
  33   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  34
  35   // Redirect top-level navigations only.
  36   if (source->IsSubframe())
  37     return false;
  38
  39   Profile* profile =
  40       Profile::FromBrowserContext(source->GetBrowserContext());
  41   if (!profile)
  42     return false;
  43
  44   ExtensionService* service =
  45       extensions::ExtensionSystem::Get(profile)->extension_service();
  46   DCHECK(service);
  47   const Extension* extension = service->GetInstalledExtension(app_id);
  48
  49   // Only launch apps.
  50   if (extension && !extension->is_app())
  51     return false;
  52
  53   // The EphemeralAppLauncher will handle launching of an existing app or
  54   // installing and launching a new ephemeral app.
  55   scoped_refptr<EphemeralAppLauncher> installer =
  56       EphemeralAppLauncher::CreateForWebContents(
  57           app_id, source, EphemeralAppLauncher::LaunchCallback());
  58   installer->Start();
  59   return true;
  60 }
  61
  62 }  // namespace
  63
  64 // static
  65 content::ResourceThrottle*
  66 EphemeralAppThrottle::MaybeCreateThrottleForLaunch(
  67     net::URLRequest* request,
  68     ProfileIOData* profile_io_data) {
  69   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
  70           switches::kEnableLinkableEphemeralApps))
  71     return NULL;
  72
  73   if (request->method() != "GET" || !request->url().SchemeIsHTTPOrHTTPS())
  74     return NULL;
  75
  76   // Not supported for incognito profiles.
  77   if (profile_io_data->IsOffTheRecord())
  78     return NULL;
  79
  80   // Only watch for links in Google search results.
  81   if (request->referrer().find("https://www.google.com") == std::string::npos)
  82     return NULL;
  83
  84   // Crudely watch for links to Chrome Web Store detail pages and assume that
  85   // the app ID will be after the last slash of the URL. We cannot even
  86   // differentiate between apps and extensions, so attempt to launch both.
  87   // This is obviously for demonstration purposes only and will be implemented
  88   // properly in production code - for example, links to ephemeral apps could
  89   // have a new scheme.
  90   if (request->url().spec().find(
  91           extension_urls::GetWebstoreItemDetailURLPrefix()) != 0)
  92     return NULL;
  93
  94   std::string app_id(request->url().ExtractFileName());
  95   if (!crx_file::id_util::IdIsValid(app_id))
  96     return NULL;
  97
  98   return new navigation_interception::InterceptNavigationResourceThrottle(
  99       request,
 100       base::Bind(&LaunchEphemeralApp, app_id));
 101 }