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 <set>
   8 #include <utility>
   9
  10 #include "base/command_line.h"
  11 #include "base/files/file_path.h"
  12 #include "base/files/file_util.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_registry.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/manifest_handlers/kiosk_mode_info.h"
  37 #include "net/base/filename_util.h"
  38 #include "net/base/net_util.h"
  39 #include "url/gurl.h"
  40
  41 #if defined(OS_CHROMEOS)
  42 #include "components/user_manager/user_manager.h"
  43 #endif
  44
  45 namespace app_runtime = extensions::api::app_runtime;
  46
  47 using content::BrowserThread;
  48 using extensions::AppRuntimeEventRouter;
  49 using extensions::app_file_handler_util::CreateFileEntry;
  50 using extensions::app_file_handler_util::FileHandlerCanHandleFile;
  51 using extensions::app_file_handler_util::FileHandlerForId;
  52 using extensions::app_file_handler_util::FirstFileHandlerForFile;
  53 using extensions::app_file_handler_util::HasFileSystemWritePermission;
  54 using extensions::app_file_handler_util::PrepareFilesForWritableApp;
  55 using extensions::EventRouter;
  56 using extensions::Extension;
  57 using extensions::ExtensionHost;
  58 using extensions::GrantedFileEntry;
  59
  60 namespace apps {
  61
  62 namespace {
  63
  64 const char kFallbackMimeType[] = "application/octet-stream";
  65
  66 bool DoMakePathAbsolute(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     base::FilePath absolute_path = base::MakeAbsoluteFilePath(*file_path);
  74     if (absolute_path.empty())
  75       return false;
  76     *file_path = absolute_path;
  77     return true;
  78   }
  79
  80   if (!current_directory.IsAbsolute())
  81     return false;
  82
  83   *file_path = current_directory.Append(*file_path);
  84   return true;
  85 }
  86
  87 // Class to handle launching of platform apps to open specific paths.
  88 // An instance of this class is created for each launch. The lifetime of these
  89 // instances is managed by reference counted pointers. As long as an instance
  90 // has outstanding tasks on a message queue it will be retained; once all
  91 // outstanding tasks are completed it will be deleted.
  92 class PlatformAppPathLauncher
  93     : public base::RefCountedThreadSafe<PlatformAppPathLauncher> {
  94  public:
  95   PlatformAppPathLauncher(Profile* profile,
  96                           const Extension* extension,
  97                           const std::vector<base::FilePath>& file_paths)
  98       : profile_(profile),
  99         extension_id(extension->id()),
 100         file_paths_(file_paths),
 101         collector_(profile) {}
 102
 103   PlatformAppPathLauncher(Profile* profile,
 104                           const Extension* extension,
 105                           const base::FilePath& file_path)
 106       : profile_(profile), extension_id(extension->id()), collector_(profile) {
 107     if (!file_path.empty())
 108       file_paths_.push_back(file_path);
 109   }
 110
 111   void Launch() {
 112     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 113
 114     const Extension* extension = GetExtension();
 115     if (!extension)
 116       return;
 117
 118     if (file_paths_.empty()) {
 119       LaunchWithNoLaunchData();
 120       return;
 121     }
 122
 123     for (size_t i = 0; i < file_paths_.size(); ++i) {
 124       DCHECK(file_paths_[i].IsAbsolute());
 125     }
 126
 127     if (HasFileSystemWritePermission(extension)) {
 128       PrepareFilesForWritableApp(
 129           file_paths_,
 130           profile_,
 131           false,
 132           base::Bind(&PlatformAppPathLauncher::OnFilesValid, this),
 133           base::Bind(&PlatformAppPathLauncher::OnFilesInvalid, this));
 134       return;
 135     }
 136
 137     OnFilesValid();
 138   }
 139
 140   void LaunchWithHandler(const std::string& handler_id) {
 141     handler_id_ = handler_id;
 142     Launch();
 143   }
 144
 145   void LaunchWithRelativePath(const base::FilePath& current_directory) {
 146     BrowserThread::PostTask(
 147         BrowserThread::FILE,
 148         FROM_HERE,
 149         base::Bind(&PlatformAppPathLauncher::MakePathAbsolute,
 150                    this,
 151                    current_directory));
 152   }
 153
 154  private:
 155   friend class base::RefCountedThreadSafe<PlatformAppPathLauncher>;
 156
 157   virtual ~PlatformAppPathLauncher() {}
 158
 159   void MakePathAbsolute(const base::FilePath& current_directory) {
 160     DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 161
 162     for (std::vector<base::FilePath>::iterator it = file_paths_.begin();
 163          it != file_paths_.end();
 164          ++it) {
 165       if (!DoMakePathAbsolute(current_directory, &*it)) {
 166         LOG(WARNING) << "Cannot make absolute path from " << it->value();
 167         BrowserThread::PostTask(
 168             BrowserThread::UI,
 169             FROM_HERE,
 170             base::Bind(&PlatformAppPathLauncher::LaunchWithNoLaunchData, this));
 171         return;
 172       }
 173     }
 174
 175     BrowserThread::PostTask(BrowserThread::UI,
 176                             FROM_HERE,
 177                             base::Bind(&PlatformAppPathLauncher::Launch, this));
 178   }
 179
 180   void OnFilesValid() {
 181     collector_.CollectForLocalPaths(
 182         file_paths_,
 183         base::Bind(&PlatformAppPathLauncher::OnMimeTypesCollected, this));
 184   }
 185
 186   void OnFilesInvalid(const base::FilePath& /* error_path */) {
 187     LaunchWithNoLaunchData();
 188   }
 189
 190   void LaunchWithNoLaunchData() {
 191     // This method is required as an entry point on the UI thread.
 192     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 193
 194     const Extension* extension = GetExtension();
 195     if (!extension)
 196       return;
 197
 198     AppRuntimeEventRouter::DispatchOnLaunchedEvent(
 199         profile_, extension, extensions::SOURCE_FILE_HANDLER);
 200   }
 201
 202   void OnMimeTypesCollected(scoped_ptr<std::vector<std::string> > mime_types) {
 203     DCHECK(file_paths_.size() == mime_types->size());
 204
 205     const Extension* extension = GetExtension();
 206     if (!extension)
 207       return;
 208
 209     // If fetching a mime type failed, then use a fallback one.
 210     for (size_t i = 0; i < mime_types->size(); ++i) {
 211       const std::string mime_type =
 212           !(*mime_types)[i].empty() ? (*mime_types)[i] : kFallbackMimeType;
 213       mime_types_.push_back(mime_type);
 214     }
 215
 216     // Find file handler from the platform app for the file being opened.
 217     const extensions::FileHandlerInfo* handler = NULL;
 218     if (!handler_id_.empty()) {
 219       handler = FileHandlerForId(*extension, handler_id_);
 220       if (handler) {
 221         for (size_t i = 0; i < file_paths_.size(); ++i) {
 222           if (!FileHandlerCanHandleFile(
 223                   *handler, mime_types_[i], file_paths_[i])) {
 224             LOG(WARNING)
 225                 << "Extension does not provide a valid file handler for "
 226                 << file_paths_[i].value();
 227             handler = NULL;
 228             break;
 229           }
 230         }
 231       }
 232     } else {
 233       std::set<std::pair<base::FilePath, std::string> > path_and_file_type_set;
 234       for (size_t i = 0; i < file_paths_.size(); ++i) {
 235         path_and_file_type_set.insert(
 236             std::make_pair(file_paths_[i], mime_types_[i]));
 237       }
 238       const std::vector<const extensions::FileHandlerInfo*>& handlers =
 239           extensions::app_file_handler_util::FindFileHandlersForFiles(
 240               *extension, path_and_file_type_set);
 241       if (!handlers.empty())
 242         handler = handlers[0];
 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.";
 249       LaunchWithNoLaunchData();
 250       return;
 251     }
 252
 253     if (handler_id_.empty())
 254       handler_id_ = handler->id;
 255
 256     // Access needs to be granted to the file for the process associated with
 257     // the extension. To do this the ExtensionHost is needed. This might not be
 258     // available, or it might be in the process of being unloaded, in which case
 259     // the lazy background task queue is used to load the extension and then
 260     // call back to us.
 261     extensions::LazyBackgroundTaskQueue* const queue =
 262         extensions::LazyBackgroundTaskQueue::Get(profile_);
 263     if (queue->ShouldEnqueueTask(profile_, extension)) {
 264       queue->AddPendingTask(
 265           profile_, extension_id,
 266           base::Bind(&PlatformAppPathLauncher::GrantAccessToFilesAndLaunch,
 267                      this));
 268       return;
 269     }
 270
 271     extensions::ProcessManager* const process_manager =
 272         extensions::ProcessManager::Get(profile_);
 273     ExtensionHost* const host =
 274         process_manager->GetBackgroundHostForExtension(extension_id);
 275     DCHECK(host);
 276     GrantAccessToFilesAndLaunch(host);
 277   }
 278
 279   void GrantAccessToFilesAndLaunch(ExtensionHost* host) {
 280     const Extension* extension = GetExtension();
 281     if (!extension)
 282       return;
 283
 284     // If there was an error loading the app page, |host| will be NULL.
 285     if (!host) {
 286       LOG(ERROR) << "Could not load app page for " << extension_id;
 287       return;
 288     }
 289
 290     std::vector<GrantedFileEntry> file_entries;
 291     for (size_t i = 0; i < file_paths_.size(); ++i) {
 292       file_entries.push_back(CreateFileEntry(
 293           profile_, extension, host->render_process_host()->GetID(),
 294           file_paths_[i], false));
 295     }
 296
 297     AppRuntimeEventRouter::DispatchOnLaunchedEventWithFileEntries(
 298         profile_, extension, handler_id_, mime_types_, file_entries);
 299   }
 300
 301   const Extension* GetExtension() const {
 302     return extensions::ExtensionRegistry::Get(profile_)->GetExtensionById(
 303         extension_id, extensions::ExtensionRegistry::EVERYTHING);
 304   }
 305
 306   // The profile the app should be run in.
 307   Profile* profile_;
 308   // The id of the extension providing the app. A pointer to the extension is
 309   // not kept as the extension may be unloaded and deleted during the course of
 310   // the launch.
 311   const std::string extension_id;
 312   // The path to be passed through to the app.
 313   std::vector<base::FilePath> file_paths_;
 314   std::vector<std::string> mime_types_;
 315   // The ID of the file handler used to launch the app.
 316   std::string handler_id_;
 317   extensions::app_file_handler_util::MimeTypeCollector collector_;
 318
 319   DISALLOW_COPY_AND_ASSIGN(PlatformAppPathLauncher);
 320 };
 321
 322 }  // namespace
 323
 324 void LaunchPlatformAppWithCommandLine(Profile* profile,
 325                                       const Extension* extension,
 326                                       const base::CommandLine& command_line,
 327                                       const base::FilePath& current_directory,
 328                                       extensions::AppLaunchSource source) {
 329   // An app with "kiosk_only" should not be installed and launched
 330   // outside of ChromeOS kiosk mode in the first place. This is a defensive
 331   // check in case this scenario does occur.
 332   if (extensions::KioskModeInfo::IsKioskOnly(extension)) {
 333     bool in_kiosk_mode = false;
 334 #if defined(OS_CHROMEOS)
 335     user_manager::UserManager* user_manager = user_manager::UserManager::Get();
 336     in_kiosk_mode = user_manager && user_manager->IsLoggedInAsKioskApp();
 337 #endif
 338     if (!in_kiosk_mode) {
 339       LOG(ERROR) << "App with 'kiosk_only' attribute must be run in "
 340           << " ChromeOS kiosk mode.";
 341       NOTREACHED();
 342       return;
 343     }
 344   }
 345
 346 #if defined(OS_WIN)
 347   base::CommandLine::StringType about_blank_url(
 348       base::ASCIIToUTF16(url::kAboutBlankURL));
 349 #else
 350   base::CommandLine::StringType about_blank_url(url::kAboutBlankURL);
 351 #endif
 352   base::CommandLine::StringVector args = command_line.GetArgs();
 353   // Browser tests will add about:blank to the command line. This should
 354   // never be interpreted as a file to open, as doing so with an app that
 355   // has write access will result in a file 'about' being created, which
 356   // causes problems on the bots.
 357   if (args.empty() || (command_line.HasSwitch(switches::kTestType) &&
 358                        args[0] == about_blank_url)) {
 359     AppRuntimeEventRouter::DispatchOnLaunchedEvent(profile, extension, source);
 360     return;
 361   }
 362
 363   base::FilePath file_path(command_line.GetArgs()[0]);
 364   scoped_refptr<PlatformAppPathLauncher> launcher =
 365       new PlatformAppPathLauncher(profile, extension, file_path);
 366   launcher->LaunchWithRelativePath(current_directory);
 367 }
 368
 369 void LaunchPlatformAppWithPath(Profile* profile,
 370                                const Extension* extension,
 371                                const base::FilePath& file_path) {
 372   scoped_refptr<PlatformAppPathLauncher> launcher =
 373       new PlatformAppPathLauncher(profile, extension, file_path);
 374   launcher->Launch();
 375 }
 376
 377 void LaunchPlatformApp(Profile* profile,
 378                        const Extension* extension,
 379                        extensions::AppLaunchSource source) {
 380   LaunchPlatformAppWithCommandLine(
 381       profile,
 382       extension,
 383       base::CommandLine(base::CommandLine::NO_PROGRAM),
 384       base::FilePath(),
 385       source);
 386 }
 387
 388 void LaunchPlatformAppWithFileHandler(
 389     Profile* profile,
 390     const Extension* extension,
 391     const std::string& handler_id,
 392     const std::vector<base::FilePath>& file_paths) {
 393   scoped_refptr<PlatformAppPathLauncher> launcher =
 394       new PlatformAppPathLauncher(profile, extension, file_paths);
 395   launcher->LaunchWithHandler(handler_id);
 396 }
 397
 398 void RestartPlatformApp(Profile* profile, const Extension* extension) {
 399   EventRouter* event_router = EventRouter::Get(profile);
 400   bool listening_to_restart = event_router->
 401       ExtensionHasEventListener(extension->id(),
 402                                 app_runtime::OnRestarted::kEventName);
 403
 404   if (listening_to_restart) {
 405     AppRuntimeEventRouter::DispatchOnRestartedEvent(profile, extension);
 406     return;
 407   }
 408
 409   extensions::ExtensionPrefs* extension_prefs =
 410       extensions::ExtensionPrefs::Get(profile);
 411   bool had_windows = extension_prefs->IsActive(extension->id());
 412   extension_prefs->SetIsActive(extension->id(), false);
 413   bool listening_to_launch = event_router->
 414       ExtensionHasEventListener(extension->id(),
 415                                 app_runtime::OnLaunched::kEventName);
 416
 417   if (listening_to_launch && had_windows) {
 418     AppRuntimeEventRouter::DispatchOnLaunchedEvent(
 419         profile, extension, extensions::SOURCE_RESTART);
 420   }
 421 }
 422
 423 void LaunchPlatformAppWithUrl(Profile* profile,
 424                               const Extension* extension,
 425                               const std::string& handler_id,
 426                               const GURL& url,
 427                               const GURL& referrer_url) {
 428   AppRuntimeEventRouter::DispatchOnLaunchedEventWithUrl(
 429       profile, extension, handler_id, url, referrer_url);
 430 }
 431
 432 }  // namespace apps