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