extensions/shell/browser/shell_content_browser_client.cc

   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
  37 using base::CommandLine;
  38 using content::BrowserContext;
  39 using content::BrowserThread;
  40
  41 namespace extensions {
  42 namespace {
  43
  44 ShellContentBrowserClient* g_instance = NULL;
  45
  46 }  // namespace
  47
  48 ShellContentBrowserClient::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
  55 ShellContentBrowserClient::~ShellContentBrowserClient() {
  56   g_instance = NULL;
  57 }
  58
  59 // static
  60 ShellContentBrowserClient* ShellContentBrowserClient::Get() {
  61   return g_instance;
  62 }
  63
  64 content::BrowserContext* ShellContentBrowserClient::GetBrowserContext() {
  65   return browser_main_parts_->browser_context();
  66 }
  67
  68 content::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
  75 void 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
  92 bool 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
 102 net::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
 120 bool 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
 142 void 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
 164 void 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
 186 void 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
 195 content::BrowserPpapiHost*
 196 ShellContentBrowserClient::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
 213 void 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
 220 void 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
 239 const 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