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
LaunchEphemeralApp(const std::string & app_id,content::WebContents * source,const navigation_interception::NavigationParams & params)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::CreateForLink(app_id, source);
56 installer->Start();
57 return true;
58 }
59
60 } // namespace
61
62 // static
63 content::ResourceThrottle*
MaybeCreateThrottleForLaunch(net::URLRequest * request,ProfileIOData * profile_io_data)64 EphemeralAppThrottle::MaybeCreateThrottleForLaunch(
65 net::URLRequest* request,
66 ProfileIOData* profile_io_data) {
67 if (!CommandLine::ForCurrentProcess()->HasSwitch(
68 switches::kEnableLinkableEphemeralApps))
69 return NULL;
70
71 if (request->method() != "GET" || !request->url().SchemeIsHTTPOrHTTPS())
72 return NULL;
73
74 // Not supported for incognito profiles.
75 if (profile_io_data->IsOffTheRecord())
76 return NULL;
77
78 // Only watch for links in Google search results.
79 if (request->referrer().find("https://www.google.com") == std::string::npos)
80 return NULL;
81
82 // Crudely watch for links to Chrome Web Store detail pages and assume that
83 // the app ID will be after the last slash of the URL. We cannot even
84 // differentiate between apps and extensions, so attempt to launch both.
85 // This is obviously for demonstration purposes only and will be implemented
86 // properly in production code - for example, links to ephemeral apps could
87 // have a new scheme.
88 if (request->url().spec().find(
89 extension_urls::GetWebstoreItemDetailURLPrefix()) != 0)
90 return NULL;
91
92 std::string app_id(request->url().ExtractFileName());
93 if (!Extension::IdIsValid(app_id))
94 return NULL;
95
96 return new navigation_interception::InterceptNavigationResourceThrottle(
97 request,
98 base::Bind(&LaunchEphemeralApp, app_id));
99 }
100