shell_content_browser_client.cc revision 03b57e008b61dfcb1fbad3aea950ae0e001748b0 
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/shell/browser/shell_content_browser_client.h"
6
7#include "base/command_line.h"
8#include "content/public/browser/browser_thread.h"
9#include "content/public/browser/render_process_host.h"
10#include "content/public/browser/site_instance.h"
11#include "content/public/common/content_switches.h"
12#include "content/public/common/url_constants.h"
13#include "content/shell/browser/shell_browser_context.h"
14#include "extensions/browser/extension_message_filter.h"
15#include "extensions/browser/extension_protocols.h"
16#include "extensions/browser/extension_registry.h"
17#include "extensions/browser/info_map.h"
18#include "extensions/browser/process_map.h"
19#include "extensions/common/constants.h"
20#include "extensions/common/extension.h"
21#include "extensions/common/switches.h"
22#include "extensions/shell/browser/shell_browser_context.h"
23#include "extensions/shell/browser/shell_browser_main_parts.h"
24#include "extensions/shell/browser/shell_extension_system.h"
25#include "url/gurl.h"
26
27#if !defined(DISABLE_NACL)
28#include "components/nacl/browser/nacl_browser.h"
29#include "components/nacl/browser/nacl_host_message_filter.h"
30#include "components/nacl/browser/nacl_process_host.h"
31#include "components/nacl/common/nacl_process_type.h"
32#include "components/nacl/common/nacl_switches.h"
33#include "content/public/browser/browser_child_process_host.h"
34#include "content/public/browser/child_process_data.h"
35#endif
36
37using base::CommandLine;
38using content::BrowserContext;
39using content::BrowserThread;
40
41namespace extensions {
42namespace {
43
44ShellContentBrowserClient* g_instance = NULL;
45
46}  // namespace
47
48ShellContentBrowserClient::ShellContentBrowserClient(
49    ShellBrowserMainDelegate* browser_main_delegate)
50    : browser_main_parts_(NULL), browser_main_delegate_(browser_main_delegate) {
51  DCHECK(!g_instance);
52  g_instance = this;
53}
54
55ShellContentBrowserClient::~ShellContentBrowserClient() {
56  g_instance = NULL;
57}
58
59// static
60ShellContentBrowserClient* ShellContentBrowserClient::Get() {
61  return g_instance;
62}
63
64content::BrowserContext* ShellContentBrowserClient::GetBrowserContext() {
65  return browser_main_parts_->browser_context();
66}
67
68content::BrowserMainParts* ShellContentBrowserClient::CreateBrowserMainParts(
69    const content::MainFunctionParams& parameters) {
70  browser_main_parts_ =
71      new ShellBrowserMainParts(parameters, browser_main_delegate_);
72  return browser_main_parts_;
73}
74
75void ShellContentBrowserClient::RenderProcessWillLaunch(
76    content::RenderProcessHost* host) {
77  int render_process_id = host->GetID();
78  BrowserContext* browser_context = browser_main_parts_->browser_context();
79  host->AddFilter(
80      new ExtensionMessageFilter(render_process_id, browser_context));
81  // PluginInfoMessageFilter is not required because app_shell does not have
82  // the concept of disabled plugins.
83#if !defined(DISABLE_NACL)
84  host->AddFilter(new nacl::NaClHostMessageFilter(
85      render_process_id,
86      browser_context->IsOffTheRecord(),
87      browser_context->GetPath(),
88      browser_context->GetRequestContextForRenderProcess(render_process_id)));
89#endif
90}
91
92bool ShellContentBrowserClient::ShouldUseProcessPerSite(
93    content::BrowserContext* browser_context,
94    const GURL& effective_url) {
95  // This ensures that all render views created for a single app will use the
96  // same render process (see content::SiteInstance::GetProcess). Otherwise the
97  // default behavior of ContentBrowserClient will lead to separate render
98  // processes for the background page and each app window view.
99  return true;
100}
101
102net::URLRequestContextGetter* ShellContentBrowserClient::CreateRequestContext(
103    content::BrowserContext* content_browser_context,
104    content::ProtocolHandlerMap* protocol_handlers,
105    content::URLRequestInterceptorScopedVector request_interceptors) {
106  // Handle only chrome-extension:// requests. app_shell does not support
107  // chrome-extension-resource:// requests (it does not store shared extension
108  // data in its installation directory).
109  InfoMap* extension_info_map =
110      browser_main_parts_->extension_system()->info_map();
111  (*protocol_handlers)[kExtensionScheme] =
112      linked_ptr<net::URLRequestJobFactory::ProtocolHandler>(
113          CreateExtensionProtocolHandler(false /* is_incognito */,
114                                         extension_info_map));
115  // Let content::ShellBrowserContext handle the rest of the setup.
116  return browser_main_parts_->browser_context()->CreateRequestContext(
117      protocol_handlers, request_interceptors.Pass());
118}
119
120bool ShellContentBrowserClient::IsHandledURL(const GURL& url) {
121  if (!url.is_valid())
122    return false;
123  // Keep in sync with ProtocolHandlers added in CreateRequestContext() and in
124  // content::ShellURLRequestContextGetter::GetURLRequestContext().
125  static const char* const kProtocolList[] = {
126      url::kBlobScheme,
127      content::kChromeDevToolsScheme,
128      content::kChromeUIScheme,
129      url::kDataScheme,
130      url::kFileScheme,
131      url::kFileSystemScheme,
132      kExtensionScheme,
133      kExtensionResourceScheme,
134  };
135  for (size_t i = 0; i < arraysize(kProtocolList); ++i) {
136    if (url.scheme() == kProtocolList[i])
137      return true;
138  }
139  return false;
140}
141
142void ShellContentBrowserClient::SiteInstanceGotProcess(
143    content::SiteInstance* site_instance) {
144  // If this isn't an extension renderer there's nothing to do.
145  const Extension* extension = GetExtension(site_instance);
146  if (!extension)
147    return;
148
149  ProcessMap::Get(browser_main_parts_->browser_context())
150      ->Insert(extension->id(),
151               site_instance->GetProcess()->GetID(),
152               site_instance->GetId());
153
154  BrowserThread::PostTask(
155      BrowserThread::IO,
156      FROM_HERE,
157      base::Bind(&InfoMap::RegisterExtensionProcess,
158                 browser_main_parts_->extension_system()->info_map(),
159                 extension->id(),
160                 site_instance->GetProcess()->GetID(),
161                 site_instance->GetId()));
162}
163
164void ShellContentBrowserClient::SiteInstanceDeleting(
165    content::SiteInstance* site_instance) {
166  // If this isn't an extension renderer there's nothing to do.
167  const Extension* extension = GetExtension(site_instance);
168  if (!extension)
169    return;
170
171  ProcessMap::Get(browser_main_parts_->browser_context())
172      ->Remove(extension->id(),
173               site_instance->GetProcess()->GetID(),
174               site_instance->GetId());
175
176  BrowserThread::PostTask(
177      BrowserThread::IO,
178      FROM_HERE,
179      base::Bind(&InfoMap::UnregisterExtensionProcess,
180                 browser_main_parts_->extension_system()->info_map(),
181                 extension->id(),
182                 site_instance->GetProcess()->GetID(),
183                 site_instance->GetId()));
184}
185
186void ShellContentBrowserClient::AppendExtraCommandLineSwitches(
187    CommandLine* command_line,
188    int child_process_id) {
189  std::string process_type =
190      command_line->GetSwitchValueASCII(::switches::kProcessType);
191  if (process_type == ::switches::kRendererProcess)
192    AppendRendererSwitches(command_line);
193}
194
195content::BrowserPpapiHost*
196ShellContentBrowserClient::GetExternalBrowserPpapiHost(int plugin_process_id) {
197#if !defined(DISABLE_NACL)
198  content::BrowserChildProcessHostIterator iter(PROCESS_TYPE_NACL_LOADER);
199  while (!iter.Done()) {
200    nacl::NaClProcessHost* host = static_cast<nacl::NaClProcessHost*>(
201        iter.GetDelegate());
202    if (host->process() &&
203        host->process()->GetData().id == plugin_process_id) {
204      // Found the plugin.
205      return host->browser_ppapi_host();
206    }
207    ++iter;
208  }
209#endif
210  return NULL;
211}
212
213void ShellContentBrowserClient::GetAdditionalAllowedSchemesForFileSystem(
214    std::vector<std::string>* additional_allowed_schemes) {
215  ContentBrowserClient::GetAdditionalAllowedSchemesForFileSystem(
216      additional_allowed_schemes);
217  additional_allowed_schemes->push_back(kExtensionScheme);
218}
219
220void ShellContentBrowserClient::AppendRendererSwitches(
221    CommandLine* command_line) {
222  // TODO(jamescook): Should we check here if the process is in the extension
223  // service process map, or can we assume all renderers are extension
224  // renderers?
225  command_line->AppendSwitch(switches::kExtensionProcess);
226
227#if !defined(DISABLE_NACL)
228  // NOTE: app_shell does not support non-SFI mode, so it does not pass through
229  // SFI switches either here or for the zygote process.
230  static const char* const kSwitchNames[] = {
231    ::switches::kEnableNaClDebug,
232  };
233  command_line->CopySwitchesFrom(*CommandLine::ForCurrentProcess(),
234                                 kSwitchNames,
235                                 arraysize(kSwitchNames));
236#endif  // !defined(DISABLE_NACL)
237}
238
239const Extension* ShellContentBrowserClient::GetExtension(
240    content::SiteInstance* site_instance) {
241  ExtensionRegistry* registry =
242      ExtensionRegistry::Get(site_instance->GetBrowserContext());
243  return registry->enabled_extensions().GetExtensionOrAppByURL(
244      site_instance->GetSiteURL());
245}
246
247}  // namespace extensions
248