extension_web_contents_observer.cc revision 23730a6e56a168d1879203e4b3819bb36e3d8f1f 
1// Copyright 2014 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 "extensions/browser/extension_web_contents_observer.h"
6
7#include "content/public/browser/child_process_security_policy.h"
8#include "content/public/browser/render_process_host.h"
9#include "content/public/browser/render_view_host.h"
10#include "content/public/browser/site_instance.h"
11#include "content/public/browser/web_contents.h"
12#include "content/public/common/url_constants.h"
13#include "extensions/browser/extension_prefs.h"
14#include "extensions/browser/extension_registry.h"
15#include "extensions/browser/view_type_utils.h"
16#include "extensions/common/constants.h"
17#include "extensions/common/extension_messages.h"
18
19namespace extensions {
20
21ExtensionWebContentsObserver::ExtensionWebContentsObserver(
22    content::WebContents* web_contents)
23    : content::WebContentsObserver(web_contents),
24      browser_context_(web_contents->GetBrowserContext()) {}
25
26ExtensionWebContentsObserver::~ExtensionWebContentsObserver() {}
27
28void ExtensionWebContentsObserver::RenderViewCreated(
29    content::RenderViewHost* render_view_host) {
30  render_view_host->Send(new ExtensionMsg_NotifyRenderViewType(
31      render_view_host->GetRoutingID(), GetViewType(web_contents())));
32
33  const Extension* extension = GetExtension(render_view_host);
34  if (!extension)
35    return;
36
37  content::RenderProcessHost* process = render_view_host->GetProcess();
38
39  // Some extensions use chrome:// URLs.
40  // This is a temporary solution. Replace it with access to chrome-static://
41  // once it is implemented. See: crbug.com/226927.
42  Manifest::Type type = extension->GetType();
43  if (type == Manifest::TYPE_EXTENSION ||
44      type == Manifest::TYPE_LEGACY_PACKAGED_APP ||
45      (type == Manifest::TYPE_PLATFORM_APP &&
46       extension->location() == Manifest::COMPONENT)) {
47    content::ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
48        process->GetID(), content::kChromeUIScheme);
49  }
50
51  // Some extensions use file:// URLs.
52  if (type == Manifest::TYPE_EXTENSION ||
53      type == Manifest::TYPE_LEGACY_PACKAGED_APP) {
54    ExtensionPrefs* prefs = ExtensionPrefs::Get(browser_context_);
55    if (prefs->AllowFileAccess(extension->id())) {
56      content::ChildProcessSecurityPolicy::GetInstance()->GrantScheme(
57          process->GetID(), content::kFileScheme);
58    }
59  }
60
61  switch (type) {
62    case Manifest::TYPE_EXTENSION:
63    case Manifest::TYPE_USER_SCRIPT:
64    case Manifest::TYPE_HOSTED_APP:
65    case Manifest::TYPE_LEGACY_PACKAGED_APP:
66    case Manifest::TYPE_PLATFORM_APP:
67      // Always send a Loaded message before ActivateExtension so that
68      // ExtensionDispatcher knows what Extension is active, not just its ID.
69      // This is important for classifying the Extension's JavaScript context
70      // correctly (see ExtensionDispatcher::ClassifyJavaScriptContext).
71      render_view_host->Send(
72          new ExtensionMsg_Loaded(std::vector<ExtensionMsg_Loaded_Params>(
73              1, ExtensionMsg_Loaded_Params(extension))));
74      render_view_host->Send(
75          new ExtensionMsg_ActivateExtension(extension->id()));
76      break;
77
78    case Manifest::TYPE_UNKNOWN:
79    case Manifest::TYPE_THEME:
80    case Manifest::TYPE_SHARED_MODULE:
81      break;
82  }
83}
84
85const Extension* ExtensionWebContentsObserver::GetExtension(
86    content::RenderViewHost* render_view_host) {
87  std::string extension_id = GetExtensionId(render_view_host);
88  if (extension_id.empty())
89    return NULL;
90
91  // May be null if the extension doesn't exist, for example if somebody typos
92  // a chrome-extension:// URL.
93  return ExtensionRegistry::Get(browser_context_)
94      ->GetExtensionById(extension_id, ExtensionRegistry::ENABLED);
95}
96
97// static
98std::string ExtensionWebContentsObserver::GetExtensionId(
99    content::RenderViewHost* render_view_host) {
100  // Note that due to ChromeContentBrowserClient::GetEffectiveURL(), hosted apps
101  // (excluding bookmark apps) will have a chrome-extension:// URL for their
102  // site, so we can ignore that wrinkle here.
103  const GURL& site = render_view_host->GetSiteInstance()->GetSiteURL();
104
105  if (!site.SchemeIs(kExtensionScheme))
106    return std::string();
107
108  return site.host();
109}
110
111}  // namespace extensions
112