chrome/browser/ui/webui/nacl_ui.cc

   1 // Copyright (c) 2012 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/ui/webui/nacl_ui.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/command_line.h"
  13 #include "base/files/file_util.h"
  14 #include "base/json/json_file_value_serializer.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "base/path_service.h"
  17 #include "base/strings/string16.h"
  18 #include "base/strings/string_number_conversions.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "base/threading/sequenced_worker_pool.h"
  21 #include "base/values.h"
  22 #include "chrome/browser/plugins/plugin_prefs.h"
  23 #include "chrome/browser/profiles/profile.h"
  24 #include "chrome/common/chrome_paths.h"
  25 #include "chrome/common/chrome_switches.h"
  26 #include "chrome/common/chrome_version_info.h"
  27 #include "chrome/common/url_constants.h"
  28 #include "chrome/grit/chromium_strings.h"
  29 #include "chrome/grit/generated_resources.h"
  30 #include "content/public/browser/browser_thread.h"
  31 #include "content/public/browser/plugin_service.h"
  32 #include "content/public/browser/user_metrics.h"
  33 #include "content/public/browser/web_ui.h"
  34 #include "content/public/browser/web_ui_data_source.h"
  35 #include "content/public/browser/web_ui_message_handler.h"
  36 #include "content/public/common/webplugininfo.h"
  37 #include "grit/browser_resources.h"
  38 #include "ui/base/l10n/l10n_util.h"
  39
  40 #if defined(OS_WIN)
  41 #include "base/win/windows_version.h"
  42 #endif
  43
  44 using base::ASCIIToUTF16;
  45 using base::UserMetricsAction;
  46 using content::BrowserThread;
  47 using content::PluginService;
  48 using content::WebUIMessageHandler;
  49
  50 namespace {
  51
  52 content::WebUIDataSource* CreateNaClUIHTMLSource() {
  53   content::WebUIDataSource* source =
  54       content::WebUIDataSource::Create(chrome::kChromeUINaClHost);
  55
  56   source->AddLocalizedString("loadingMessage", IDS_NACL_LOADING_MESSAGE);
  57   source->AddLocalizedString("naclLongTitle", IDS_NACL_TITLE_MESSAGE);
  58   source->SetJsonPath("strings.js");
  59   source->AddResourcePath("about_nacl.css", IDR_ABOUT_NACL_CSS);
  60   source->AddResourcePath("about_nacl.js", IDR_ABOUT_NACL_JS);
  61   source->SetDefaultResource(IDR_ABOUT_NACL_HTML);
  62   return source;
  63 }
  64
  65 ////////////////////////////////////////////////////////////////////////////////
  66 //
  67 // NaClDomHandler
  68 //
  69 ////////////////////////////////////////////////////////////////////////////////
  70
  71 // The handler for JavaScript messages for the about:flags page.
  72 class NaClDomHandler : public WebUIMessageHandler {
  73  public:
  74   NaClDomHandler();
  75   ~NaClDomHandler() override;
  76
  77   // WebUIMessageHandler implementation.
  78   void RegisterMessages() override;
  79
  80  private:
  81   // Callback for the "requestNaClInfo" message.
  82   void HandleRequestNaClInfo(const base::ListValue* args);
  83
  84   // Callback for the NaCl plugin information.
  85   void OnGotPlugins(const std::vector<content::WebPluginInfo>& plugins);
  86
  87   // A helper callback that receives the result of checking if PNaCl path
  88   // exists and checking the PNaCl |version|. |is_valid| is true if the PNaCl
  89   // path that was returned by PathService is valid, and false otherwise.
  90   void DidCheckPathAndVersion(const std::string* version, bool is_valid);
  91
  92   // Called when enough information is gathered to return data back to the page.
  93   void MaybeRespondToPage();
  94
  95   // Helper for MaybeRespondToPage -- called after enough information
  96   // is gathered.
  97   void PopulatePageInformation(base::DictionaryValue* naclInfo);
  98
  99   // Returns whether the specified plugin is enabled.
 100   bool isPluginEnabled(size_t plugin_index);
 101
 102   // Adds information regarding the operating system and chrome version to list.
 103   void AddOperatingSystemInfo(base::ListValue* list);
 104
 105   // Adds the list of plugins for NaCl to list.
 106   void AddPluginList(base::ListValue* list);
 107
 108   // Adds the information relevant to PNaCl (e.g., enablement, paths, version)
 109   // to the list.
 110   void AddPnaclInfo(base::ListValue* list);
 111
 112   // Adds the information relevant to NaCl to list.
 113   void AddNaClInfo(base::ListValue* list);
 114
 115   // Whether the page has requested data.
 116   bool page_has_requested_data_;
 117
 118   // Whether the plugin information is ready.
 119   bool has_plugin_info_;
 120
 121   // Whether PNaCl path was validated. PathService can return a path
 122   // that does not exists, so it needs to be validated.
 123   bool pnacl_path_validated_;
 124   bool pnacl_path_exists_;
 125   std::string pnacl_version_string_;
 126
 127   // Factory for the creating refs in callbacks.
 128   base::WeakPtrFactory<NaClDomHandler> weak_ptr_factory_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(NaClDomHandler);
 131 };
 132
 133 NaClDomHandler::NaClDomHandler()
 134     : page_has_requested_data_(false),
 135       has_plugin_info_(false),
 136       pnacl_path_validated_(false),
 137       pnacl_path_exists_(false),
 138       weak_ptr_factory_(this) {
 139   PluginService::GetInstance()->GetPlugins(base::Bind(
 140       &NaClDomHandler::OnGotPlugins, weak_ptr_factory_.GetWeakPtr()));
 141 }
 142
 143 NaClDomHandler::~NaClDomHandler() {
 144 }
 145
 146 void NaClDomHandler::RegisterMessages() {
 147   web_ui()->RegisterMessageCallback(
 148       "requestNaClInfo",
 149       base::Bind(&NaClDomHandler::HandleRequestNaClInfo,
 150                  base::Unretained(this)));
 151 }
 152
 153 // Helper functions for collecting a list of key-value pairs that will
 154 // be displayed.
 155 void AddPair(base::ListValue* list,
 156              const base::string16& key,
 157              const base::string16& value) {
 158   base::DictionaryValue* results = new base::DictionaryValue();
 159   results->SetString("key", key);
 160   results->SetString("value", value);
 161   list->Append(results);
 162 }
 163
 164 // Generate an empty data-pair which acts as a line break.
 165 void AddLineBreak(base::ListValue* list) {
 166   AddPair(list, ASCIIToUTF16(""), ASCIIToUTF16(""));
 167 }
 168
 169 bool NaClDomHandler::isPluginEnabled(size_t plugin_index) {
 170   std::vector<content::WebPluginInfo> info_array;
 171   PluginService::GetInstance()->GetPluginInfoArray(
 172       GURL(), "application/x-nacl", false, &info_array, NULL);
 173   PluginPrefs* plugin_prefs =
 174       PluginPrefs::GetForProfile(Profile::FromWebUI(web_ui())).get();
 175   return (!info_array.empty() &&
 176           plugin_prefs->IsPluginEnabled(info_array[plugin_index]));
 177 }
 178
 179 void NaClDomHandler::AddOperatingSystemInfo(base::ListValue* list) {
 180   // Obtain the Chrome version info.
 181   chrome::VersionInfo version_info;
 182   AddPair(list,
 183           l10n_util::GetStringUTF16(IDS_PRODUCT_NAME),
 184           ASCIIToUTF16(version_info.Version() + " (" +
 185                        chrome::VersionInfo::GetVersionStringModifier() + ")"));
 186
 187   // OS version information.
 188   // TODO(jvoung): refactor this to share the extra windows labeling
 189   // with about:flash, or something.
 190   std::string os_label = version_info.OSType();
 191 #if defined(OS_WIN)
 192   base::win::OSInfo* os = base::win::OSInfo::GetInstance();
 193   switch (os->version()) {
 194     case base::win::VERSION_XP: os_label += " XP"; break;
 195     case base::win::VERSION_SERVER_2003:
 196       os_label += " Server 2003 or XP Pro 64 bit";
 197       break;
 198     case base::win::VERSION_VISTA: os_label += " Vista or Server 2008"; break;
 199     case base::win::VERSION_WIN7: os_label += " 7 or Server 2008 R2"; break;
 200     case base::win::VERSION_WIN8: os_label += " 8 or Server 2012"; break;
 201     default:  os_label += " UNKNOWN"; break;
 202   }
 203   os_label += " SP" + base::IntToString(os->service_pack().major);
 204   if (os->service_pack().minor > 0)
 205     os_label += "." + base::IntToString(os->service_pack().minor);
 206   if (os->architecture() == base::win::OSInfo::X64_ARCHITECTURE)
 207     os_label += " 64 bit";
 208 #endif
 209   AddPair(list,
 210           l10n_util::GetStringUTF16(IDS_ABOUT_VERSION_OS),
 211           ASCIIToUTF16(os_label));
 212   AddLineBreak(list);
 213 }
 214
 215 void NaClDomHandler::AddPluginList(base::ListValue* list) {
 216   // Obtain the version of the NaCl plugin.
 217   std::vector<content::WebPluginInfo> info_array;
 218   PluginService::GetInstance()->GetPluginInfoArray(
 219       GURL(), "application/x-nacl", false, &info_array, NULL);
 220   base::string16 nacl_version;
 221   base::string16 nacl_key = ASCIIToUTF16("NaCl plugin");
 222   if (info_array.empty()) {
 223     AddPair(list, nacl_key, ASCIIToUTF16("Disabled"));
 224   } else {
 225     // Only the 0th plugin is used.
 226     nacl_version = info_array[0].version + ASCIIToUTF16(" ") +
 227         info_array[0].path.LossyDisplayName();
 228     if (!isPluginEnabled(0)) {
 229       nacl_version += ASCIIToUTF16(" (Disabled in profile prefs)");
 230     }
 231
 232     AddPair(list, nacl_key, nacl_version);
 233
 234     // Mark the rest as not used.
 235     for (size_t i = 1; i < info_array.size(); ++i) {
 236       nacl_version = info_array[i].version + ASCIIToUTF16(" ") +
 237           info_array[i].path.LossyDisplayName();
 238       nacl_version += ASCIIToUTF16(" (not used)");
 239       if (!isPluginEnabled(i)) {
 240         nacl_version += ASCIIToUTF16(" (Disabled in profile prefs)");
 241       }
 242       AddPair(list, nacl_key, nacl_version);
 243     }
 244   }
 245   AddLineBreak(list);
 246 }
 247
 248 void NaClDomHandler::AddPnaclInfo(base::ListValue* list) {
 249   // Display whether PNaCl is enabled.
 250   base::string16 pnacl_enabled_string = ASCIIToUTF16("Enabled");
 251   if (!isPluginEnabled(0)) {
 252     pnacl_enabled_string = ASCIIToUTF16("Disabled in profile prefs");
 253   }
 254   AddPair(list,
 255           ASCIIToUTF16("Portable Native Client (PNaCl)"),
 256           pnacl_enabled_string);
 257
 258   // Obtain the version of the PNaCl translator.
 259   base::FilePath pnacl_path;
 260   bool got_path = PathService::Get(chrome::DIR_PNACL_COMPONENT, &pnacl_path);
 261   if (!got_path || pnacl_path.empty() || !pnacl_path_exists_) {
 262     AddPair(list,
 263             ASCIIToUTF16("PNaCl translator"),
 264             ASCIIToUTF16("Not installed"));
 265   } else {
 266     AddPair(list,
 267             ASCIIToUTF16("PNaCl translator path"),
 268             pnacl_path.LossyDisplayName());
 269     AddPair(list,
 270             ASCIIToUTF16("PNaCl translator version"),
 271             ASCIIToUTF16(pnacl_version_string_));
 272   }
 273   AddLineBreak(list);
 274 }
 275
 276 void NaClDomHandler::AddNaClInfo(base::ListValue* list) {
 277   base::string16 nacl_enabled_string = ASCIIToUTF16("Disabled");
 278   if (isPluginEnabled(0) &&
 279       base::CommandLine::ForCurrentProcess()->HasSwitch(
 280           switches::kEnableNaCl)) {
 281     nacl_enabled_string = ASCIIToUTF16("Enabled by flag '--enable-nacl'");
 282   }
 283   AddPair(list,
 284           ASCIIToUTF16("Native Client (non-portable, outside web store)"),
 285           nacl_enabled_string);
 286   AddLineBreak(list);
 287 }
 288
 289 void NaClDomHandler::HandleRequestNaClInfo(const base::ListValue* args) {
 290   page_has_requested_data_ = true;
 291   // Force re-validation of PNaCl's path in the next call to
 292   // MaybeRespondToPage(), in case PNaCl went from not-installed
 293   // to installed since the request.
 294   pnacl_path_validated_ = false;
 295   MaybeRespondToPage();
 296 }
 297
 298 void NaClDomHandler::OnGotPlugins(
 299     const std::vector<content::WebPluginInfo>& plugins) {
 300   has_plugin_info_ = true;
 301   MaybeRespondToPage();
 302 }
 303
 304 void NaClDomHandler::PopulatePageInformation(base::DictionaryValue* naclInfo) {
 305   DCHECK(pnacl_path_validated_);
 306   // Store Key-Value pairs of about-information.
 307   scoped_ptr<base::ListValue> list(new base::ListValue());
 308   // Display the operating system and chrome version information.
 309   AddOperatingSystemInfo(list.get());
 310   // Display the list of plugins serving NaCl.
 311   AddPluginList(list.get());
 312   // Display information relevant to PNaCl.
 313   AddPnaclInfo(list.get());
 314   // Display information relevant to NaCl (non-portable.
 315   AddNaClInfo(list.get());
 316   // naclInfo will take ownership of list, and clean it up on destruction.
 317   naclInfo->Set("naclInfo", list.release());
 318 }
 319
 320 void NaClDomHandler::DidCheckPathAndVersion(const std::string* version,
 321                                             bool is_valid) {
 322   pnacl_path_validated_ = true;
 323   pnacl_path_exists_ = is_valid;
 324   pnacl_version_string_ = *version;
 325   MaybeRespondToPage();
 326 }
 327
 328 void CheckVersion(const base::FilePath& pnacl_path, std::string* version) {
 329   base::FilePath pnacl_json_path =
 330       pnacl_path.AppendASCII("pnacl_public_pnacl_json");
 331   JSONFileValueDeserializer deserializer(pnacl_json_path);
 332   std::string error;
 333   scoped_ptr<base::Value> root(deserializer.Deserialize(NULL, &error));
 334   if (!root || !root->IsType(base::Value::TYPE_DICTIONARY))
 335     return;
 336
 337   // Now try to get the field. This may leave version empty if the
 338   // the "get" fails (no key, or wrong type).
 339   static_cast<base::DictionaryValue*>(root.get())->GetStringASCII(
 340       "pnacl-version", version);
 341 }
 342
 343 bool CheckPathAndVersion(std::string* version) {
 344   base::FilePath pnacl_path;
 345   bool got_path = PathService::Get(chrome::DIR_PNACL_COMPONENT, &pnacl_path);
 346   if (got_path && !pnacl_path.empty() && base::PathExists(pnacl_path)) {
 347     CheckVersion(pnacl_path, version);
 348     return true;
 349   }
 350   return false;
 351 }
 352
 353 void NaClDomHandler::MaybeRespondToPage() {
 354   // Don't reply until everything is ready.  The page will show a 'loading'
 355   // message until then.
 356   if (!page_has_requested_data_ || !has_plugin_info_)
 357     return;
 358
 359   if (!pnacl_path_validated_) {
 360     std::string* version_string = new std::string;
 361     base::PostTaskAndReplyWithResult(
 362         BrowserThread::GetBlockingPool(),
 363         FROM_HERE,
 364         base::Bind(&CheckPathAndVersion, version_string),
 365         base::Bind(&NaClDomHandler::DidCheckPathAndVersion,
 366                    weak_ptr_factory_.GetWeakPtr(),
 367                    base::Owned(version_string)));
 368     return;
 369   }
 370
 371   base::DictionaryValue naclInfo;
 372   PopulatePageInformation(&naclInfo);
 373   web_ui()->CallJavascriptFunction("nacl.returnNaClInfo", naclInfo);
 374 }
 375
 376 }  // namespace
 377
 378 ///////////////////////////////////////////////////////////////////////////////
 379 //
 380 // NaClUI
 381 //
 382 ///////////////////////////////////////////////////////////////////////////////
 383
 384 NaClUI::NaClUI(content::WebUI* web_ui) : WebUIController(web_ui) {
 385   content::RecordAction(UserMetricsAction("ViewAboutNaCl"));
 386
 387   web_ui->AddMessageHandler(new NaClDomHandler());
 388
 389   // Set up the about:nacl source.
 390   Profile* profile = Profile::FromWebUI(web_ui);
 391   content::WebUIDataSource::Add(profile, CreateNaClUIHTMLSource());
 392 }