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