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