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