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 <utility>
   8 #include <set>
   9
  10 #include "base/command_line.h"
  11 #include "base/file_util.h"
  12 #include "base/files/file_path.h"
  13 #include "base/logging.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "chrome/browser/extensions/api/file_handlers/app_file_handler_util.h"
  18 #include "chrome/browser/extensions/api/file_handlers/mime_util.h"
  19 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
  20 #include "chrome/browser/profiles/profile.h"
  21 #include "content/public/browser/browser_thread.h"
  22 #include "content/public/browser/render_process_host.h"
  23 #include "content/public/browser/web_contents.h"
  24 #include "content/public/common/content_switches.h"
  25 #include "content/public/common/url_constants.h"
  26 #include "extensions/browser/api/app_runtime/app_runtime_api.h"
  27 #include "extensions/browser/event_router.h"
  28 #include "extensions/browser/extension_host.h"
  29 #include "extensions/browser/extension_prefs.h"
  30 #include "extensions/browser/extension_system.h"
  31 #include "extensions/browser/granted_file_entry.h"
  32 #include "extensions/browser/lazy_background_task_queue.h"
  33 #include "extensions/browser/process_manager.h"
  34 #include "extensions/common/api/app_runtime.h"
  35 #include "extensions/common/extension.h"
  36 #include "extensions/common/extension_messages.h"
  37 #include "extensions/common/manifest_handlers/kiosk_mode_info.h"
  38 #include "net/base/filename_util.h"
  39 #include "net/base/net_util.h"
  40 #include "url/gurl.h"
  41
  42 #if defined(OS_CHROMEOS)
  43 #include "chrome/browser/chromeos/login/users/user_manager.h"
  44 #endif
  45
  46 namespace app_runtime = extensions::core_api::app_runtime;
  47
  48 using content::BrowserThread;
  49 using extensions::AppRuntimeEventRouter;
  50 using extensions::app_file_handler_util::CreateFileEntry;
  51 using extensions::app_file_handler_util::FileHandlerCanHandleFile;
  52 using extensions::app_file_handler_util::FileHandlerForId;
  53 using extensions::app_file_handler_util::FirstFileHandlerForFile;
  54 using extensions::app_file_handler_util::HasFileSystemWritePermission;
  55 using extensions::app_file_handler_util::PrepareFilesForWritableApp;
  56 using extensions::EventRouter;
  57 using extensions::Extension;
  58 using extensions::ExtensionHost;
  59 using extensions::ExtensionSystem;
  60 using extensions::GrantedFileEntry;
  61
  62 namespace apps {
  63
  64 namespace {
  65
  66 const char kFallbackMimeType[] = "application/octet-stream";
  67
  68 bool DoMakePathAbsolute(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 // Helper method to launch the platform app |extension| with no data. This
  87 // should be called in the fallback case, where it has been impossible to
  88 // load or obtain file launch data.
  89 void LaunchPlatformAppWithNoData(Profile* profile, const Extension* extension) {
  90   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  91   AppRuntimeEventRouter::DispatchOnLaunchedEvent(profile, extension);
  92 }
  93
  94 // Class to handle launching of platform apps to open specific paths.
  95 // An instance of this class is created for each launch. The lifetime of these
  96 // instances is managed by reference counted pointers. As long as an instance
  97 // has outstanding tasks on a message queue it will be retained; once all
  98 // outstanding tasks are completed it will be deleted.
  99 class PlatformAppPathLauncher
 100     : public base::RefCountedThreadSafe<PlatformAppPathLauncher> {
 101  public:
 102   PlatformAppPathLauncher(Profile* profile,
 103                           const Extension* extension,
 104                           const std::vector<base::FilePath>& file_paths)
 105       : profile_(profile),
 106         extension_(extension),
 107         file_paths_(file_paths),
 108         collector_(profile) {}
 109
 110   PlatformAppPathLauncher(Profile* profile,
 111                           const Extension* extension,
 112                           const base::FilePath& file_path)
 113       : profile_(profile), extension_(extension), collector_(profile) {
 114     if (!file_path.empty())
 115       file_paths_.push_back(file_path);
 116   }
 117
 118   void Launch() {
 119     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 120     if (file_paths_.empty()) {
 121       LaunchPlatformAppWithNoData(profile_, extension_);
 122       return;
 123     }
 124
 125     for (size_t i = 0; i < file_paths_.size(); ++i) {
 126       DCHECK(file_paths_[i].IsAbsolute());
 127     }
 128
 129     if (HasFileSystemWritePermission(extension_)) {
 130       PrepareFilesForWritableApp(
 131           file_paths_,
 132           profile_,
 133           false,
 134           base::Bind(&PlatformAppPathLauncher::OnFilesValid, this),
 135           base::Bind(&PlatformAppPathLauncher::OnFilesInvalid, this));
 136       return;
 137     }
 138
 139     OnFilesValid();
 140   }
 141
 142   void LaunchWithHandler(const std::string& handler_id) {
 143     handler_id_ = handler_id;
 144     Launch();
 145   }
 146
 147   void LaunchWithRelativePath(const base::FilePath& current_directory) {
 148     BrowserThread::PostTask(
 149         BrowserThread::FILE,
 150         FROM_HERE,
 151         base::Bind(&PlatformAppPathLauncher::MakePathAbsolute,
 152                    this,
 153                    current_directory));
 154   }
 155
 156  private:
 157   friend class base::RefCountedThreadSafe<PlatformAppPathLauncher>;
 158
 159   virtual ~PlatformAppPathLauncher() {}
 160
 161   void MakePathAbsolute(const base::FilePath& current_directory) {
 162     DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 163
 164     for (std::vector<base::FilePath>::iterator it = file_paths_.begin();
 165          it != file_paths_.end();
 166          ++it) {
 167       if (!DoMakePathAbsolute(current_directory, &*it)) {
 168         LOG(WARNING) << "Cannot make absolute path from " << it->value();
 169         BrowserThread::PostTask(
 170             BrowserThread::UI,
 171             FROM_HERE,
 172             base::Bind(&PlatformAppPathLauncher::LaunchWithNoLaunchData, this));
 173         return;
 174       }
 175     }
 176
 177     BrowserThread::PostTask(BrowserThread::UI,
 178                             FROM_HERE,
 179                             base::Bind(&PlatformAppPathLauncher::Launch, this));
 180   }
 181
 182   void OnFilesValid() {
 183     collector_.CollectForLocalPaths(
 184         file_paths_,
 185         base::Bind(&PlatformAppPathLauncher::OnMimeTypesCollected, this));
 186   }
 187
 188   void OnFilesInvalid(const base::FilePath& /* error_path */) {
 189     LaunchWithNoLaunchData();
 190   }
 191
 192   void LaunchWithNoLaunchData() {
 193     // This method is required as an entry point on the UI thread.
 194     LaunchPlatformAppWithNoData(profile_, extension_);
 195   }
 196
 197   void OnMimeTypesCollected(scoped_ptr<std::vector<std::string> > mime_types) {
 198     DCHECK(file_paths_.size() == mime_types->size());
 199
 200     // If fetching a mime type failed, then use a fallback one.
 201     for (size_t i = 0; i < mime_types->size(); ++i) {
 202       const std::string mime_type =
 203           !(*mime_types)[i].empty() ? (*mime_types)[i] : kFallbackMimeType;
 204       mime_types_.push_back(mime_type);
 205     }
 206
 207     // Find file handler from the platform app for the file being opened.
 208     const extensions::FileHandlerInfo* handler = NULL;
 209     if (!handler_id_.empty()) {
 210       handler = FileHandlerForId(*extension_, handler_id_);
 211       if (handler) {
 212         for (size_t i = 0; i < file_paths_.size(); ++i) {
 213           if (!FileHandlerCanHandleFile(
 214                   *handler, mime_types_[i], file_paths_[i])) {
 215             LOG(WARNING)
 216                 << "Extension does not provide a valid file handler for "
 217                 << file_paths_[i].value();
 218             handler = NULL;
 219             break;
 220           }
 221         }
 222       }
 223     } else {
 224       std::set<std::pair<base::FilePath, std::string> > path_and_file_type_set;
 225       for (size_t i = 0; i < file_paths_.size(); ++i) {
 226         path_and_file_type_set.insert(
 227             std::make_pair(file_paths_[i], mime_types_[i]));
 228       }
 229       const std::vector<const extensions::FileHandlerInfo*>& handlers =
 230           extensions::app_file_handler_util::FindFileHandlersForFiles(
 231               *extension_, path_and_file_type_set);
 232       if (!handlers.empty())
 233         handler = handlers[0];
 234     }
 235
 236     // If this app doesn't have a file handler that supports the file, launch
 237     // with no launch data.
 238     if (!handler) {
 239       LOG(WARNING) << "Extension does not provide a valid file handler.";
 240       LaunchWithNoLaunchData();
 241       return;
 242     }
 243
 244     if (handler_id_.empty())
 245       handler_id_ = handler->id;
 246
 247     // Access needs to be granted to the file for the process associated with
 248     // the extension. To do this the ExtensionHost is needed. This might not be
 249     // available, or it might be in the process of being unloaded, in which case
 250     // the lazy background task queue is used to load the extension and then
 251     // call back to us.
 252     extensions::LazyBackgroundTaskQueue* const queue =
 253         ExtensionSystem::Get(profile_)->lazy_background_task_queue();
 254     if (queue->ShouldEnqueueTask(profile_, extension_)) {
 255       queue->AddPendingTask(
 256           profile_,
 257           extension_->id(),
 258           base::Bind(&PlatformAppPathLauncher::GrantAccessToFilesAndLaunch,
 259                      this));
 260       return;
 261     }
 262
 263     extensions::ProcessManager* const process_manager =
 264         ExtensionSystem::Get(profile_)->process_manager();
 265     ExtensionHost* const host =
 266         process_manager->GetBackgroundHostForExtension(extension_->id());
 267     DCHECK(host);
 268     GrantAccessToFilesAndLaunch(host);
 269   }
 270
 271   void GrantAccessToFilesAndLaunch(ExtensionHost* host) {
 272     // If there was an error loading the app page, |host| will be NULL.
 273     if (!host) {
 274       LOG(ERROR) << "Could not load app page for " << extension_->id();
 275       return;
 276     }
 277
 278     std::vector<GrantedFileEntry> file_entries;
 279     for (size_t i = 0; i < file_paths_.size(); ++i) {
 280       file_entries.push_back(
 281           CreateFileEntry(profile_,
 282                           extension_,
 283                           host->render_process_host()->GetID(),
 284                           file_paths_[i],
 285                           false));
 286     }
 287
 288     AppRuntimeEventRouter::DispatchOnLaunchedEventWithFileEntries(
 289         profile_, extension_, handler_id_, mime_types_, file_entries);
 290   }
 291
 292   // The profile the app should be run in.
 293   Profile* profile_;
 294   // The extension providing the app.
 295   // TODO(benwells): Hold onto the extension ID instead of a pointer as it
 296   // is possible the extension will be unloaded while we're doing our thing.
 297   // See http://crbug.com/372270 for details.
 298   const Extension* extension_;
 299   // The path to be passed through to the app.
 300   std::vector<base::FilePath> file_paths_;
 301   std::vector<std::string> mime_types_;
 302   // The ID of the file handler used to launch the app.
 303   std::string handler_id_;
 304   extensions::app_file_handler_util::MimeTypeCollector collector_;
 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   // An app with "kiosk_only" should not be installed and launched
 316   // outside of ChromeOS kiosk mode in the first place. This is a defensive
 317   // check in case this scenario does occur.
 318   if (extensions::KioskModeInfo::IsKioskOnly(extension)) {
 319     bool in_kiosk_mode = false;
 320 #if defined(OS_CHROMEOS)
 321     chromeos::UserManager* user_manager = chromeos::UserManager::Get();
 322     in_kiosk_mode = user_manager && user_manager->IsLoggedInAsKioskApp();
 323 #endif
 324     if (!in_kiosk_mode) {
 325       LOG(ERROR) << "App with 'kiosk_only' attribute must be run in "
 326           << " ChromeOS kiosk mode.";
 327       NOTREACHED();
 328       return;
 329     }
 330   }
 331
 332 #if defined(OS_WIN)
 333   base::CommandLine::StringType about_blank_url(
 334       base::ASCIIToWide(url::kAboutBlankURL));
 335 #else
 336   base::CommandLine::StringType about_blank_url(url::kAboutBlankURL);
 337 #endif
 338   CommandLine::StringVector args = command_line.GetArgs();
 339   // Browser tests will add about:blank to the command line. This should
 340   // never be interpreted as a file to open, as doing so with an app that
 341   // has write access will result in a file 'about' being created, which
 342   // causes problems on the bots.
 343   if (args.empty() || (command_line.HasSwitch(switches::kTestType) &&
 344                        args[0] == about_blank_url)) {
 345     LaunchPlatformAppWithNoData(profile, extension);
 346     return;
 347   }
 348
 349   base::FilePath file_path(command_line.GetArgs()[0]);
 350   scoped_refptr<PlatformAppPathLauncher> launcher =
 351       new PlatformAppPathLauncher(profile, extension, file_path);
 352   launcher->LaunchWithRelativePath(current_directory);
 353 }
 354
 355 void LaunchPlatformAppWithPath(Profile* profile,
 356                                const Extension* extension,
 357                                const base::FilePath& file_path) {
 358   scoped_refptr<PlatformAppPathLauncher> launcher =
 359       new PlatformAppPathLauncher(profile, extension, file_path);
 360   launcher->Launch();
 361 }
 362
 363 void LaunchPlatformApp(Profile* profile, const Extension* extension) {
 364   LaunchPlatformAppWithCommandLine(profile,
 365                                    extension,
 366                                    CommandLine(CommandLine::NO_PROGRAM),
 367                                    base::FilePath());
 368 }
 369
 370 void LaunchPlatformAppWithFileHandler(
 371     Profile* profile,
 372     const Extension* extension,
 373     const std::string& handler_id,
 374     const std::vector<base::FilePath>& file_paths) {
 375   scoped_refptr<PlatformAppPathLauncher> launcher =
 376       new PlatformAppPathLauncher(profile, extension, file_paths);
 377   launcher->LaunchWithHandler(handler_id);
 378 }
 379
 380 void RestartPlatformApp(Profile* profile, const Extension* extension) {
 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     AppRuntimeEventRouter::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   AppRuntimeEventRouter::DispatchOnLaunchedEventWithUrl(
 409       profile, extension, handler_id, url, referrer_url);
 410 }
 411
 412 }  // namespace apps