src/apps/launcher.cc

   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 "apps/launcher.h"
   6
   7 #include "apps/apps_client.h"
   8 #include "base/command_line.h"
   9 #include "base/file_util.h"
  10 #include "base/files/file_path.h"
  11 #include "base/logging.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "chrome/browser/extensions/api/app_runtime/app_runtime_api.h"
  16 #include "chrome/browser/extensions/api/file_handlers/app_file_handler_util.h"
  17 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
  18 #include "chrome/browser/profiles/profile.h"
  19 #include "chrome/common/extensions/api/app_runtime.h"
  20 #include "content/public/browser/browser_thread.h"
  21 #include "content/public/browser/render_process_host.h"
  22 #include "content/public/browser/web_contents.h"
  23 #include "extensions/browser/event_router.h"
  24 #include "extensions/browser/extension_host.h"
  25 #include "extensions/browser/extension_prefs.h"
  26 #include "extensions/browser/extension_system.h"
  27 #include "extensions/browser/lazy_background_task_queue.h"
  28 #include "extensions/browser/process_manager.h"
  29 #include "extensions/common/extension.h"
  30 #include "extensions/common/extension_messages.h"
  31 #include "extensions/common/manifest_handlers/kiosk_mode_info.h"
  32 #include "net/base/mime_util.h"
  33 #include "net/base/net_util.h"
  34 #include "url/gurl.h"
  35
  36 #if defined(OS_CHROMEOS)
  37 #include "chrome/browser/chromeos/drive/file_errors.h"
  38 #include "chrome/browser/chromeos/drive/file_system_interface.h"
  39 #include "chrome/browser/chromeos/drive/file_system_util.h"
  40 #include "chrome/browser/chromeos/login/user_manager.h"
  41 #endif
  42
  43 #if defined(OS_WIN)
  44 #include "win8/util/win8_util.h"
  45 #endif
  46
  47 namespace app_runtime = extensions::api::app_runtime;
  48
  49 using content::BrowserThread;
  50 using extensions::app_file_handler_util::CheckWritableFiles;
  51 using extensions::app_file_handler_util::FileHandlerForId;
  52 using extensions::app_file_handler_util::FileHandlerCanHandleFile;
  53 using extensions::app_file_handler_util::FirstFileHandlerForFile;
  54 using extensions::app_file_handler_util::CreateFileEntry;
  55 using extensions::app_file_handler_util::GrantedFileEntry;
  56 using extensions::app_file_handler_util::HasFileSystemWritePermission;
  57 using extensions::EventRouter;
  58 using extensions::Extension;
  59 using extensions::ExtensionHost;
  60 using extensions::ExtensionSystem;
  61
  62 namespace apps {
  63
  64 namespace {
  65
  66 const char kFallbackMimeType[] = "application/octet-stream";
  67
  68 bool MakePathAbsolute(const base::FilePath& current_directory,
  69                       base::FilePath* file_path) {
  70   DCHECK(file_path);
  71   if (file_path->IsAbsolute())
  72     return true;
  73
  74   if (current_directory.empty()) {
  75     *file_path = base::MakeAbsoluteFilePath(*file_path);
  76     return !file_path->empty();
  77   }
  78
  79   if (!current_directory.IsAbsolute())
  80     return false;
  81
  82   *file_path = current_directory.Append(*file_path);
  83   return true;
  84 }
  85
  86 bool GetAbsolutePathFromCommandLine(const CommandLine& command_line,
  87                                     const base::FilePath& current_directory,
  88                                     base::FilePath* path) {
  89   if (!command_line.GetArgs().size())
  90     return false;
  91
  92   base::FilePath relative_path(command_line.GetArgs()[0]);
  93   base::FilePath absolute_path(relative_path);
  94   if (!MakePathAbsolute(current_directory, &absolute_path)) {
  95     LOG(WARNING) << "Cannot make absolute path from " << relative_path.value();
  96     return false;
  97   }
  98   *path = absolute_path;
  99   return true;
 100 }
 101
 102 // Helper method to launch the platform app |extension| with no data. This
 103 // should be called in the fallback case, where it has been impossible to
 104 // load or obtain file launch data.
 105 void LaunchPlatformAppWithNoData(Profile* profile, const Extension* extension) {
 106   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 107   extensions::AppEventRouter::DispatchOnLaunchedEvent(profile, extension);
 108 }
 109
 110 // Class to handle launching of platform apps to open a specific path.
 111 // An instance of this class is created for each launch. The lifetime of these
 112 // instances is managed by reference counted pointers. As long as an instance
 113 // has outstanding tasks on a message queue it will be retained; once all
 114 // outstanding tasks are completed it will be deleted.
 115 class PlatformAppPathLauncher
 116     : public base::RefCountedThreadSafe<PlatformAppPathLauncher> {
 117  public:
 118   PlatformAppPathLauncher(Profile* profile,
 119                           const Extension* extension,
 120                           const base::FilePath& file_path)
 121       : profile_(profile), extension_(extension), file_path_(file_path) {}
 122
 123   void Launch() {
 124     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 125     if (file_path_.empty()) {
 126       LaunchPlatformAppWithNoData(profile_, extension_);
 127       return;
 128     }
 129
 130     DCHECK(file_path_.IsAbsolute());
 131
 132     if (HasFileSystemWritePermission(extension_)) {
 133       std::vector<base::FilePath> paths;
 134       paths.push_back(file_path_);
 135       CheckWritableFiles(
 136           paths,
 137           profile_,
 138           false,
 139           base::Bind(&PlatformAppPathLauncher::OnFileValid, this),
 140           base::Bind(&PlatformAppPathLauncher::OnFileInvalid, this));
 141       return;
 142     }
 143
 144     OnFileValid();
 145   }
 146
 147   void LaunchWithHandler(const std::string& handler_id) {
 148     handler_id_ = handler_id;
 149     Launch();
 150   }
 151
 152  private:
 153   friend class base::RefCountedThreadSafe<PlatformAppPathLauncher>;
 154
 155   virtual ~PlatformAppPathLauncher() {}
 156
 157   void OnFileValid() {
 158 #if defined(OS_CHROMEOS)
 159     if (drive::util::IsUnderDriveMountPoint(file_path_)) {
 160       PlatformAppPathLauncher::GetMimeTypeAndLaunchForDriveFile();
 161       return;
 162     }
 163 #endif
 164
 165     BrowserThread::PostTask(
 166         BrowserThread::FILE,
 167         FROM_HERE,
 168         base::Bind(&PlatformAppPathLauncher::GetMimeTypeAndLaunch, this));
 169   }
 170
 171   void OnFileInvalid(const base::FilePath& /* error_path */) {
 172     LaunchWithNoLaunchData();
 173   }
 174
 175   void GetMimeTypeAndLaunch() {
 176     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 177
 178     // If the file doesn't exist, or is a directory, launch with no launch data.
 179     if (!base::PathExists(file_path_) ||
 180         base::DirectoryExists(file_path_)) {
 181       LOG(WARNING) << "No file exists with path " << file_path_.value();
 182       BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
 183               &PlatformAppPathLauncher::LaunchWithNoLaunchData, this));
 184       return;
 185     }
 186
 187     std::string mime_type;
 188     if (!net::GetMimeTypeFromFile(file_path_, &mime_type))
 189       mime_type = kFallbackMimeType;
 190
 191     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, base::Bind(
 192             &PlatformAppPathLauncher::LaunchWithMimeType, this, mime_type));
 193   }
 194
 195 #if defined(OS_CHROMEOS)
 196   void GetMimeTypeAndLaunchForDriveFile() {
 197     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 198
 199     drive::FileSystemInterface* file_system =
 200         drive::util::GetFileSystemByProfile(profile_);
 201     if (!file_system) {
 202       LaunchWithNoLaunchData();
 203       return;
 204     }
 205
 206     file_system->GetFile(
 207         drive::util::ExtractDrivePath(file_path_),
 208         base::Bind(&PlatformAppPathLauncher::OnGotDriveFile, this));
 209   }
 210
 211   void OnGotDriveFile(drive::FileError error,
 212                       const base::FilePath& file_path,
 213                       scoped_ptr<drive::ResourceEntry> entry) {
 214     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 215
 216     if (error != drive::FILE_ERROR_OK ||
 217         !entry || entry->file_specific_info().is_hosted_document()) {
 218       LaunchWithNoLaunchData();
 219       return;
 220     }
 221
 222     const std::string& mime_type =
 223         entry->file_specific_info().content_mime_type();
 224     LaunchWithMimeType(mime_type.empty() ? kFallbackMimeType : mime_type);
 225   }
 226 #endif  // defined(OS_CHROMEOS)
 227
 228   void LaunchWithNoLaunchData() {
 229     // This method is required as an entry point on the UI thread.
 230     LaunchPlatformAppWithNoData(profile_, extension_);
 231   }
 232
 233   void LaunchWithMimeType(const std::string& mime_type) {
 234     // Find file handler from the platform app for the file being opened.
 235     const extensions::FileHandlerInfo* handler = NULL;
 236     if (!handler_id_.empty())
 237       handler = FileHandlerForId(*extension_, handler_id_);
 238     else
 239       handler = FirstFileHandlerForFile(*extension_, mime_type, file_path_);
 240     if (handler && !FileHandlerCanHandleFile(*handler, mime_type, file_path_)) {
 241       LOG(WARNING) << "Extension does not provide a valid file handler for "
 242                    << file_path_.value();
 243       LaunchWithNoLaunchData();
 244       return;
 245     }
 246
 247     // If this app doesn't have a file handler that supports the file, launch
 248     // with no launch data.
 249     if (!handler) {
 250       LOG(WARNING) << "Extension does not provide a valid file handler for "
 251                    << file_path_.value();
 252       LaunchWithNoLaunchData();
 253       return;
 254     }
 255
 256     if (handler_id_.empty())
 257       handler_id_ = handler->id;
 258
 259     // Access needs to be granted to the file for the process associated with
 260     // the extension. To do this the ExtensionHost is needed. This might not be
 261     // available, or it might be in the process of being unloaded, in which case
 262     // the lazy background task queue is used to load the extension and then
 263     // call back to us.
 264     extensions::LazyBackgroundTaskQueue* queue =
 265         ExtensionSystem::Get(profile_)->lazy_background_task_queue();
 266     if (queue->ShouldEnqueueTask(profile_, extension_)) {
 267       queue->AddPendingTask(profile_, extension_->id(), base::Bind(
 268               &PlatformAppPathLauncher::GrantAccessToFileAndLaunch,
 269               this, mime_type));
 270       return;
 271     }
 272
 273     extensions::ProcessManager* process_manager =
 274         ExtensionSystem::Get(profile_)->process_manager();
 275     ExtensionHost* host =
 276         process_manager->GetBackgroundHostForExtension(extension_->id());
 277     DCHECK(host);
 278     GrantAccessToFileAndLaunch(mime_type, host);
 279   }
 280
 281   void GrantAccessToFileAndLaunch(const std::string& mime_type,
 282                                   ExtensionHost* host) {
 283     // If there was an error loading the app page, |host| will be NULL.
 284     if (!host) {
 285       LOG(ERROR) << "Could not load app page for " << extension_->id();
 286       return;
 287     }
 288
 289     GrantedFileEntry file_entry =
 290         CreateFileEntry(profile_,
 291                         extension_,
 292                         host->render_process_host()->GetID(),
 293                         file_path_,
 294                         false);
 295     extensions::AppEventRouter::DispatchOnLaunchedEventWithFileEntry(
 296         profile_, extension_, handler_id_, mime_type, file_entry);
 297   }
 298
 299   // The profile the app should be run in.
 300   Profile* profile_;
 301   // The extension providing the app.
 302   const Extension* extension_;
 303   // The path to be passed through to the app.
 304   const base::FilePath file_path_;
 305   // The ID of the file handler used to launch the app.
 306   std::string handler_id_;
 307
 308   DISALLOW_COPY_AND_ASSIGN(PlatformAppPathLauncher);
 309 };
 310
 311 }  // namespace
 312
 313 void LaunchPlatformAppWithCommandLine(Profile* profile,
 314                                       const Extension* extension,
 315                                       const CommandLine& command_line,
 316                                       const base::FilePath& current_directory) {
 317   if (!AppsClient::Get()->CheckAppLaunch(profile, extension))
 318     return;
 319
 320   // An app with "kiosk_only" should not be installed and launched
 321   // outside of ChromeOS kiosk mode in the first place. This is a defensive
 322   // check in case this scenario does occur.
 323   if (extensions::KioskModeInfo::IsKioskOnly(extension)) {
 324     bool in_kiosk_mode = false;
 325 #if defined(OS_CHROMEOS)
 326     chromeos::UserManager* user_manager = chromeos::UserManager::Get();
 327     in_kiosk_mode = user_manager && user_manager->IsLoggedInAsKioskApp();
 328 #endif
 329     if (!in_kiosk_mode) {
 330       LOG(ERROR) << "App with 'kiosk_only' attribute must be run in "
 331           << " ChromeOS kiosk mode.";
 332       NOTREACHED();
 333       return;
 334     }
 335   }
 336
 337   base::FilePath path;
 338   if (!GetAbsolutePathFromCommandLine(command_line, current_directory, &path)) {
 339     LaunchPlatformAppWithNoData(profile, extension);
 340     return;
 341   }
 342
 343   // TODO(benwells): add a command-line argument to provide a handler ID.
 344   LaunchPlatformAppWithPath(profile, extension, path);
 345 }
 346
 347 void LaunchPlatformAppWithPath(Profile* profile,
 348                                const Extension* extension,
 349                                const base::FilePath& file_path) {
 350   // launcher will be freed when nothing has a reference to it. The message
 351   // queue will retain a reference for any outstanding task, so when the
 352   // launcher has finished it will be freed.
 353   scoped_refptr<PlatformAppPathLauncher> launcher =
 354       new PlatformAppPathLauncher(profile, extension, file_path);
 355   launcher->Launch();
 356 }
 357
 358 void LaunchPlatformApp(Profile* profile, const Extension* extension) {
 359   LaunchPlatformAppWithCommandLine(profile,
 360                                    extension,
 361                                    CommandLine(CommandLine::NO_PROGRAM),
 362                                    base::FilePath());
 363 }
 364
 365 void LaunchPlatformAppWithFileHandler(Profile* profile,
 366                                       const Extension* extension,
 367                                       const std::string& handler_id,
 368                                       const base::FilePath& file_path) {
 369   scoped_refptr<PlatformAppPathLauncher> launcher =
 370       new PlatformAppPathLauncher(profile, extension, file_path);
 371   launcher->LaunchWithHandler(handler_id);
 372 }
 373
 374 void RestartPlatformApp(Profile* profile, const Extension* extension) {
 375 #if defined(OS_WIN)
 376   // On Windows 8's single window Metro mode we can not launch platform apps.
 377   // In restart we are just making sure launch doesn't slip through.
 378   if (win8::IsSingleWindowMetroMode())
 379     return;
 380 #endif
 381   EventRouter* event_router = EventRouter::Get(profile);
 382   bool listening_to_restart = event_router->
 383       ExtensionHasEventListener(extension->id(),
 384                                 app_runtime::OnRestarted::kEventName);
 385
 386   if (listening_to_restart) {
 387     extensions::AppEventRouter::DispatchOnRestartedEvent(profile, extension);
 388     return;
 389   }
 390
 391   extensions::ExtensionPrefs* extension_prefs =
 392       extensions::ExtensionPrefs::Get(profile);
 393   bool had_windows = extension_prefs->IsActive(extension->id());
 394   extension_prefs->SetIsActive(extension->id(), false);
 395   bool listening_to_launch = event_router->
 396       ExtensionHasEventListener(extension->id(),
 397                                 app_runtime::OnLaunched::kEventName);
 398
 399   if (listening_to_launch && had_windows)
 400     LaunchPlatformAppWithNoData(profile, extension);
 401 }
 402
 403 void LaunchPlatformAppWithUrl(Profile* profile,
 404                               const Extension* extension,
 405                               const std::string& handler_id,
 406                               const GURL& url,
 407                               const GURL& referrer_url) {
 408   extensions::AppEventRouter::DispatchOnLaunchedEventWithUrl(
 409       profile, extension, handler_id, url, referrer_url);
 410 }
 411
 412 }  // namespace apps