src/chrome/test/chromedriver/chrome_launcher.cc

   1 // Copyright (c) 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 "chrome/test/chromedriver/chrome_launcher.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "base/base64.h"
  11 #include "base/basictypes.h"
  12 #include "base/command_line.h"
  13 #include "base/file_util.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/scoped_file.h"
  16 #include "base/format_macros.h"
  17 #include "base/json/json_reader.h"
  18 #include "base/json/json_writer.h"
  19 #include "base/logging.h"
  20 #include "base/process/kill.h"
  21 #include "base/process/launch.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_util.h"
  24 #include "base/strings/stringprintf.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "base/threading/platform_thread.h"
  27 #include "base/time/time.h"
  28 #include "base/values.h"
  29 #include "chrome/common/chrome_constants.h"
  30 #include "chrome/test/chromedriver/chrome/chrome_android_impl.h"
  31 #include "chrome/test/chromedriver/chrome/chrome_desktop_impl.h"
  32 #include "chrome/test/chromedriver/chrome/chrome_existing_impl.h"
  33 #include "chrome/test/chromedriver/chrome/chrome_finder.h"
  34 #include "chrome/test/chromedriver/chrome/device_manager.h"
  35 #include "chrome/test/chromedriver/chrome/devtools_http_client.h"
  36 #include "chrome/test/chromedriver/chrome/embedded_automation_extension.h"
  37 #include "chrome/test/chromedriver/chrome/status.h"
  38 #include "chrome/test/chromedriver/chrome/user_data_dir.h"
  39 #include "chrome/test/chromedriver/chrome/version.h"
  40 #include "chrome/test/chromedriver/chrome/web_view.h"
  41 #include "chrome/test/chromedriver/net/port_server.h"
  42 #include "chrome/test/chromedriver/net/url_request_context_getter.h"
  43 #include "crypto/rsa_private_key.h"
  44 #include "crypto/sha2.h"
  45 #include "third_party/zlib/google/zip.h"
  46
  47 #if defined(OS_POSIX)
  48 #include <fcntl.h>
  49 #include <sys/stat.h>
  50 #include <sys/types.h>
  51 #endif
  52
  53 namespace {
  54
  55 const char* kCommonSwitches[] = {
  56     "ignore-certificate-errors", "metrics-recording-only"};
  57
  58 #if defined(OS_LINUX)
  59 const char* kEnableCrashReport = "enable-crash-reporter-for-testing";
  60 #endif
  61
  62 Status UnpackAutomationExtension(const base::FilePath& temp_dir,
  63                                  base::FilePath* automation_extension) {
  64   std::string decoded_extension;
  65   if (!base::Base64Decode(kAutomationExtension, &decoded_extension))
  66     return Status(kUnknownError, "failed to base64decode automation extension");
  67
  68   base::FilePath extension_zip = temp_dir.AppendASCII("internal.zip");
  69   int size = static_cast<int>(decoded_extension.length());
  70   if (base::WriteFile(extension_zip, decoded_extension.c_str(), size)
  71       != size) {
  72     return Status(kUnknownError, "failed to write automation extension zip");
  73   }
  74
  75   base::FilePath extension_dir = temp_dir.AppendASCII("internal");
  76   if (!zip::Unzip(extension_zip, extension_dir))
  77     return Status(kUnknownError, "failed to unzip automation extension");
  78
  79   *automation_extension = extension_dir;
  80   return Status(kOk);
  81 }
  82
  83 Status PrepareCommandLine(int port,
  84                           const Capabilities& capabilities,
  85                           CommandLine* prepared_command,
  86                           base::ScopedTempDir* user_data_dir,
  87                           base::ScopedTempDir* extension_dir,
  88                           std::vector<std::string>* extension_bg_pages) {
  89   base::FilePath program = capabilities.binary;
  90   if (program.empty()) {
  91     if (!FindChrome(&program))
  92       return Status(kUnknownError, "cannot find Chrome binary");
  93   } else if (!base::PathExists(program)) {
  94     return Status(kUnknownError,
  95                   base::StringPrintf("no chrome binary at %" PRFilePath,
  96                                      program.value().c_str()));
  97   }
  98   CommandLine command(program);
  99   Switches switches;
 100
 101   for (size_t i = 0; i < arraysize(kCommonSwitches); ++i)
 102     switches.SetSwitch(kCommonSwitches[i]);
 103   switches.SetSwitch("disable-hang-monitor");
 104   switches.SetSwitch("disable-prompt-on-repost");
 105   switches.SetSwitch("disable-sync");
 106   switches.SetSwitch("no-first-run");
 107   switches.SetSwitch("disable-background-networking");
 108   switches.SetSwitch("disable-web-resources");
 109   switches.SetSwitch("safebrowsing-disable-auto-update");
 110   switches.SetSwitch("safebrowsing-disable-download-protection");
 111   switches.SetSwitch("disable-client-side-phishing-detection");
 112   switches.SetSwitch("disable-component-update");
 113   switches.SetSwitch("disable-default-apps");
 114   switches.SetSwitch("enable-logging");
 115   switches.SetSwitch("logging-level", "1");
 116   switches.SetSwitch("password-store", "basic");
 117   switches.SetSwitch("use-mock-keychain");
 118   switches.SetSwitch("remote-debugging-port", base::IntToString(port));
 119
 120   for (std::set<std::string>::const_iterator iter =
 121            capabilities.exclude_switches.begin();
 122        iter != capabilities.exclude_switches.end();
 123        ++iter) {
 124     switches.RemoveSwitch(*iter);
 125   }
 126   switches.SetFromSwitches(capabilities.switches);
 127
 128   if (!switches.HasSwitch("user-data-dir")) {
 129     command.AppendArg("data:,");
 130     if (!user_data_dir->CreateUniqueTempDir())
 131       return Status(kUnknownError, "cannot create temp dir for user data dir");
 132     switches.SetSwitch("user-data-dir", user_data_dir->path().value());
 133     Status status = internal::PrepareUserDataDir(
 134         user_data_dir->path(), capabilities.prefs.get(),
 135         capabilities.local_state.get());
 136     if (status.IsError())
 137       return status;
 138   }
 139
 140   if (!extension_dir->CreateUniqueTempDir()) {
 141     return Status(kUnknownError,
 142                   "cannot create temp dir for unpacking extensions");
 143   }
 144   Status status = internal::ProcessExtensions(capabilities.extensions,
 145                                               extension_dir->path(),
 146                                               true,
 147                                               &switches,
 148                                               extension_bg_pages);
 149   if (status.IsError())
 150     return status;
 151   switches.AppendToCommandLine(&command);
 152   *prepared_command = command;
 153   return Status(kOk);
 154 }
 155
 156 Status WaitForDevToolsAndCheckVersion(
 157     const NetAddress& address,
 158     URLRequestContextGetter* context_getter,
 159     const SyncWebSocketFactory& socket_factory,
 160     scoped_ptr<DevToolsHttpClient>* user_client) {
 161   scoped_ptr<DevToolsHttpClient> client(new DevToolsHttpClient(
 162       address, context_getter, socket_factory));
 163   base::TimeTicks deadline =
 164       base::TimeTicks::Now() + base::TimeDelta::FromSeconds(60);
 165   Status status = client->Init(deadline - base::TimeTicks::Now());
 166   if (status.IsError())
 167     return status;
 168   if (client->browser_info()->build_no < kMinimumSupportedChromeBuildNo) {
 169     return Status(kUnknownError, "Chrome version must be >= " +
 170         GetMinimumSupportedChromeVersion());
 171   }
 172
 173   while (base::TimeTicks::Now() < deadline) {
 174     WebViewsInfo views_info;
 175     client->GetWebViewsInfo(&views_info);
 176     for (size_t i = 0; i < views_info.GetSize(); ++i) {
 177       if (views_info.Get(i).type == WebViewInfo::kPage) {
 178         *user_client = client.Pass();
 179         return Status(kOk);
 180       }
 181     }
 182     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(50));
 183   }
 184   return Status(kUnknownError, "unable to discover open pages");
 185 }
 186
 187 Status LaunchExistingChromeSession(
 188     URLRequestContextGetter* context_getter,
 189     const SyncWebSocketFactory& socket_factory,
 190     const Capabilities& capabilities,
 191     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
 192     scoped_ptr<Chrome>* chrome) {
 193   Status status(kOk);
 194   scoped_ptr<DevToolsHttpClient> devtools_client;
 195   status = WaitForDevToolsAndCheckVersion(
 196       capabilities.debugger_address, context_getter, socket_factory,
 197       &devtools_client);
 198   if (status.IsError()) {
 199     return Status(kUnknownError, "cannot connect to chrome at " +
 200                       capabilities.debugger_address.ToString(),
 201                   status);
 202   }
 203   chrome->reset(new ChromeExistingImpl(devtools_client.Pass(),
 204                                        devtools_event_listeners));
 205   return Status(kOk);
 206 }
 207
 208 Status LaunchDesktopChrome(
 209     URLRequestContextGetter* context_getter,
 210     int port,
 211     scoped_ptr<PortReservation> port_reservation,
 212     const SyncWebSocketFactory& socket_factory,
 213     const Capabilities& capabilities,
 214     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
 215     scoped_ptr<Chrome>* chrome) {
 216   CommandLine command(CommandLine::NO_PROGRAM);
 217   base::ScopedTempDir user_data_dir;
 218   base::ScopedTempDir extension_dir;
 219   std::vector<std::string> extension_bg_pages;
 220   Status status = PrepareCommandLine(port,
 221                                      capabilities,
 222                                      &command,
 223                                      &user_data_dir,
 224                                      &extension_dir,
 225                                      &extension_bg_pages);
 226   if (status.IsError())
 227     return status;
 228
 229   base::LaunchOptions options;
 230
 231 #if defined(OS_LINUX)
 232   // If minidump path is set in the capability, enable minidump for crashes.
 233   if (!capabilities.minidump_path.empty()) {
 234     VLOG(0) << "Minidump generation specified. Will save dumps to: "
 235             << capabilities.minidump_path;
 236
 237     options.environ["CHROME_HEADLESS"] = 1;
 238     options.environ["BREAKPAD_DUMP_LOCATION"] = capabilities.minidump_path;
 239
 240     if (!command.HasSwitch(kEnableCrashReport))
 241       command.AppendSwitch(kEnableCrashReport);
 242   }
 243
 244   // We need to allow new privileges so that chrome's setuid sandbox can run.
 245   options.allow_new_privs = true;
 246 #endif
 247
 248 #if !defined(OS_WIN)
 249   if (!capabilities.log_path.empty())
 250     options.environ["CHROME_LOG_FILE"] = capabilities.log_path;
 251   if (capabilities.detach)
 252     options.new_process_group = true;
 253 #endif
 254
 255 #if defined(OS_POSIX)
 256   base::FileHandleMappingVector no_stderr;
 257   base::ScopedFD devnull;
 258   if (!CommandLine::ForCurrentProcess()->HasSwitch("verbose")) {
 259     // Redirect stderr to /dev/null, so that Chrome log spew doesn't confuse
 260     // users.
 261     devnull.reset(HANDLE_EINTR(open("/dev/null", O_WRONLY)));
 262     if (!devnull.is_valid())
 263       return Status(kUnknownError, "couldn't open /dev/null");
 264     no_stderr.push_back(std::make_pair(devnull.get(), STDERR_FILENO));
 265     options.fds_to_remap = &no_stderr;
 266   }
 267 #endif
 268
 269 #if defined(OS_WIN)
 270   std::string command_string = base::WideToUTF8(command.GetCommandLineString());
 271 #else
 272   std::string command_string = command.GetCommandLineString();
 273 #endif
 274   VLOG(0) << "Launching chrome: " << command_string;
 275   base::ProcessHandle process;
 276   if (!base::LaunchProcess(command, options, &process))
 277     return Status(kUnknownError, "chrome failed to start");
 278
 279   scoped_ptr<DevToolsHttpClient> devtools_client;
 280   status = WaitForDevToolsAndCheckVersion(
 281       NetAddress(port), context_getter, socket_factory, &devtools_client);
 282
 283   if (status.IsError()) {
 284     int exit_code;
 285     base::TerminationStatus chrome_status =
 286         base::GetTerminationStatus(process, &exit_code);
 287     if (chrome_status != base::TERMINATION_STATUS_STILL_RUNNING) {
 288       std::string termination_reason;
 289       switch (chrome_status) {
 290         case base::TERMINATION_STATUS_NORMAL_TERMINATION:
 291           termination_reason = "exited normally";
 292           break;
 293         case base::TERMINATION_STATUS_ABNORMAL_TERMINATION:
 294           termination_reason = "exited abnormally";
 295           break;
 296         case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
 297           termination_reason = "was killed";
 298           break;
 299         case base::TERMINATION_STATUS_PROCESS_CRASHED:
 300           termination_reason = "crashed";
 301           break;
 302         default:
 303           termination_reason = "unknown";
 304           break;
 305       }
 306       return Status(kUnknownError,
 307                     "Chrome failed to start: " + termination_reason);
 308     }
 309     if (!base::KillProcess(process, 0, true)) {
 310       int exit_code;
 311       if (base::GetTerminationStatus(process, &exit_code) ==
 312           base::TERMINATION_STATUS_STILL_RUNNING)
 313         return Status(kUnknownError, "cannot kill Chrome", status);
 314     }
 315     return status;
 316   }
 317   scoped_ptr<ChromeDesktopImpl> chrome_desktop(
 318       new ChromeDesktopImpl(devtools_client.Pass(),
 319                             devtools_event_listeners,
 320                             port_reservation.Pass(),
 321                             process,
 322                             command,
 323                             &user_data_dir,
 324                             &extension_dir));
 325   for (size_t i = 0; i < extension_bg_pages.size(); ++i) {
 326     VLOG(0) << "Waiting for extension bg page load: " << extension_bg_pages[i];
 327     scoped_ptr<WebView> web_view;
 328     Status status = chrome_desktop->WaitForPageToLoad(
 329         extension_bg_pages[i], base::TimeDelta::FromSeconds(10), &web_view);
 330     if (status.IsError()) {
 331       return Status(kUnknownError,
 332                     "failed to wait for extension background page to load: " +
 333                         extension_bg_pages[i],
 334                     status);
 335     }
 336   }
 337   *chrome = chrome_desktop.Pass();
 338   return Status(kOk);
 339 }
 340
 341 Status LaunchAndroidChrome(
 342     URLRequestContextGetter* context_getter,
 343     int port,
 344     scoped_ptr<PortReservation> port_reservation,
 345     const SyncWebSocketFactory& socket_factory,
 346     const Capabilities& capabilities,
 347     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
 348     DeviceManager* device_manager,
 349     scoped_ptr<Chrome>* chrome) {
 350   Status status(kOk);
 351   scoped_ptr<Device> device;
 352   if (capabilities.android_device_serial.empty()) {
 353     status = device_manager->AcquireDevice(&device);
 354   } else {
 355     status = device_manager->AcquireSpecificDevice(
 356         capabilities.android_device_serial, &device);
 357   }
 358   if (status.IsError())
 359     return status;
 360
 361   Switches switches(capabilities.switches);
 362   for (size_t i = 0; i < arraysize(kCommonSwitches); ++i)
 363     switches.SetSwitch(kCommonSwitches[i]);
 364   switches.SetSwitch("disable-fre");
 365   switches.SetSwitch("enable-remote-debugging");
 366   status = device->SetUp(capabilities.android_package,
 367                          capabilities.android_activity,
 368                          capabilities.android_process,
 369                          switches.ToString(),
 370                          capabilities.android_use_running_app,
 371                          port);
 372   if (status.IsError()) {
 373     device->TearDown();
 374     return status;
 375   }
 376
 377   scoped_ptr<DevToolsHttpClient> devtools_client;
 378   status = WaitForDevToolsAndCheckVersion(NetAddress(port),
 379                                           context_getter,
 380                                           socket_factory,
 381                                           &devtools_client);
 382   if (status.IsError()) {
 383     device->TearDown();
 384     return status;
 385   }
 386
 387   chrome->reset(new ChromeAndroidImpl(devtools_client.Pass(),
 388                                       devtools_event_listeners,
 389                                       port_reservation.Pass(),
 390                                       device.Pass()));
 391   return Status(kOk);
 392 }
 393
 394 }  // namespace
 395
 396 Status LaunchChrome(
 397     URLRequestContextGetter* context_getter,
 398     const SyncWebSocketFactory& socket_factory,
 399     DeviceManager* device_manager,
 400     PortServer* port_server,
 401     PortManager* port_manager,
 402     const Capabilities& capabilities,
 403     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
 404     scoped_ptr<Chrome>* chrome) {
 405   if (capabilities.IsExistingBrowser()) {
 406     return LaunchExistingChromeSession(
 407         context_getter, socket_factory,
 408         capabilities, devtools_event_listeners, chrome);
 409   }
 410
 411   int port = 0;
 412   scoped_ptr<PortReservation> port_reservation;
 413   Status port_status(kOk);
 414
 415   if (capabilities.IsAndroid()) {
 416     port_status = port_manager->ReservePortFromPool(&port, &port_reservation);
 417     if (port_status.IsError())
 418       return Status(kUnknownError, "cannot reserve port for Chrome",
 419                     port_status);
 420     return LaunchAndroidChrome(context_getter,
 421                                port,
 422                                port_reservation.Pass(),
 423                                socket_factory,
 424                                capabilities,
 425                                devtools_event_listeners,
 426                                device_manager,
 427                                chrome);
 428   } else {
 429     if (port_server)
 430       port_status = port_server->ReservePort(&port, &port_reservation);
 431     else
 432       port_status = port_manager->ReservePort(&port, &port_reservation);
 433     if (port_status.IsError())
 434       return Status(kUnknownError, "cannot reserve port for Chrome",
 435                     port_status);
 436     return LaunchDesktopChrome(context_getter,
 437                                port,
 438                                port_reservation.Pass(),
 439                                socket_factory,
 440                                capabilities,
 441                                devtools_event_listeners,
 442                                chrome);
 443   }
 444 }
 445
 446 namespace internal {
 447
 448 void ConvertHexadecimalToIDAlphabet(std::string* id) {
 449   for (size_t i = 0; i < id->size(); ++i) {
 450     int val;
 451     if (base::HexStringToInt(base::StringPiece(id->begin() + i,
 452                                                id->begin() + i + 1),
 453                              &val)) {
 454       (*id)[i] = val + 'a';
 455     } else {
 456       (*id)[i] = 'a';
 457     }
 458   }
 459 }
 460
 461 std::string GenerateExtensionId(const std::string& input) {
 462   uint8 hash[16];
 463   crypto::SHA256HashString(input, hash, sizeof(hash));
 464   std::string output = StringToLowerASCII(base::HexEncode(hash, sizeof(hash)));
 465   ConvertHexadecimalToIDAlphabet(&output);
 466   return output;
 467 }
 468
 469 Status GetExtensionBackgroundPage(const base::DictionaryValue* manifest,
 470                                   const std::string& id,
 471                                   std::string* bg_page) {
 472   std::string bg_page_name;
 473   bool persistent = true;
 474   manifest->GetBoolean("background.persistent", &persistent);
 475   const base::Value* unused_value;
 476   if (manifest->Get("background.scripts", &unused_value))
 477     bg_page_name = "_generated_background_page.html";
 478   manifest->GetString("background.page", &bg_page_name);
 479   manifest->GetString("background_page", &bg_page_name);
 480   if (bg_page_name.empty() || !persistent)
 481     return Status(kOk);
 482   *bg_page = "chrome-extension://" + id + "/" + bg_page_name;
 483   return Status(kOk);
 484 }
 485
 486 Status ProcessExtension(const std::string& extension,
 487                         const base::FilePath& temp_dir,
 488                         base::FilePath* path,
 489                         std::string* bg_page) {
 490   // Decodes extension string.
 491   // Some WebDriver client base64 encoders follow RFC 1521, which require that
 492   // 'encoded lines be no more than 76 characters long'. Just remove any
 493   // newlines.
 494   std::string extension_base64;
 495   base::RemoveChars(extension, "\n", &extension_base64);
 496   std::string decoded_extension;
 497   if (!base::Base64Decode(extension_base64, &decoded_extension))
 498     return Status(kUnknownError, "cannot base64 decode");
 499
 500   // If the file is a crx file, extract the extension's ID from its public key.
 501   // Otherwise generate a random public key and use its derived extension ID.
 502   std::string public_key;
 503   std::string magic_header = decoded_extension.substr(0, 4);
 504   if (magic_header.size() != 4)
 505     return Status(kUnknownError, "cannot extract magic number");
 506
 507   const bool is_crx_file = magic_header == "Cr24";
 508
 509   if (is_crx_file) {
 510     // Assume a CRX v2 file - see https://developer.chrome.com/extensions/crx.
 511     std::string key_len_str = decoded_extension.substr(8, 4);
 512     if (key_len_str.size() != 4)
 513       return Status(kUnknownError, "cannot extract public key length");
 514     uint32 key_len = *reinterpret_cast<const uint32*>(key_len_str.c_str());
 515     public_key = decoded_extension.substr(16, key_len);
 516     if (key_len != public_key.size())
 517       return Status(kUnknownError, "invalid public key length");
 518   } else {
 519     // Not a CRX file. Generate RSA keypair to get a valid extension id.
 520     scoped_ptr<crypto::RSAPrivateKey> key_pair(
 521         crypto::RSAPrivateKey::Create(2048));
 522     if (!key_pair)
 523       return Status(kUnknownError, "cannot generate RSA key pair");
 524     std::vector<uint8> public_key_vector;
 525     if (!key_pair->ExportPublicKey(&public_key_vector))
 526       return Status(kUnknownError, "cannot extract public key");
 527     public_key =
 528         std::string(reinterpret_cast<char*>(&public_key_vector.front()),
 529                     public_key_vector.size());
 530   }
 531   std::string public_key_base64;
 532   base::Base64Encode(public_key, &public_key_base64);
 533   std::string id = GenerateExtensionId(public_key);
 534
 535   // Unzip the crx file.
 536   base::ScopedTempDir temp_crx_dir;
 537   if (!temp_crx_dir.CreateUniqueTempDir())
 538     return Status(kUnknownError, "cannot create temp dir");
 539   base::FilePath extension_crx = temp_crx_dir.path().AppendASCII("temp.crx");
 540   int size = static_cast<int>(decoded_extension.length());
 541   if (base::WriteFile(extension_crx, decoded_extension.c_str(), size) !=
 542       size) {
 543     return Status(kUnknownError, "cannot write file");
 544   }
 545   base::FilePath extension_dir = temp_dir.AppendASCII("extension_" + id);
 546   if (!zip::Unzip(extension_crx, extension_dir))
 547     return Status(kUnknownError, "cannot unzip");
 548
 549   // Parse the manifest and set the 'key' if not already present.
 550   base::FilePath manifest_path(extension_dir.AppendASCII("manifest.json"));
 551   std::string manifest_data;
 552   if (!base::ReadFileToString(manifest_path, &manifest_data))
 553     return Status(kUnknownError, "cannot read manifest");
 554   scoped_ptr<base::Value> manifest_value(base::JSONReader::Read(manifest_data));
 555   base::DictionaryValue* manifest;
 556   if (!manifest_value || !manifest_value->GetAsDictionary(&manifest))
 557     return Status(kUnknownError, "invalid manifest");
 558
 559   std::string manifest_key_base64;
 560   if (manifest->GetString("key", &manifest_key_base64)) {
 561     // If there is a key in both the header and the manifest, use the key in the
 562     // manifest. This allows chromedriver users users who generate dummy crxs
 563     // to set the manifest key and have a consistent ID.
 564     std::string manifest_key;
 565     if (!base::Base64Decode(manifest_key_base64, &manifest_key))
 566       return Status(kUnknownError, "'key' in manifest is not base64 encoded");
 567     std::string manifest_id = GenerateExtensionId(manifest_key);
 568     if (id != manifest_id) {
 569       if (is_crx_file) {
 570         LOG(WARNING)
 571             << "Public key in crx header is different from key in manifest"
 572             << std::endl << "key from header:   " << public_key_base64
 573             << std::endl << "key from manifest: " << manifest_key_base64
 574             << std::endl << "generated extension id from header key:   " << id
 575             << std::endl << "generated extension id from manifest key: "
 576             << manifest_id;
 577       }
 578       id = manifest_id;
 579     }
 580   } else {
 581     manifest->SetString("key", public_key_base64);
 582     base::JSONWriter::Write(manifest, &manifest_data);
 583     if (base::WriteFile(
 584             manifest_path, manifest_data.c_str(), manifest_data.size()) !=
 585         static_cast<int>(manifest_data.size())) {
 586       return Status(kUnknownError, "cannot add 'key' to manifest");
 587     }
 588   }
 589
 590   // Get extension's background page URL, if there is one.
 591   std::string bg_page_tmp;
 592   Status status = GetExtensionBackgroundPage(manifest, id, &bg_page_tmp);
 593   if (status.IsError())
 594     return status;
 595
 596   *path = extension_dir;
 597   if (bg_page_tmp.size())
 598     *bg_page = bg_page_tmp;
 599   return Status(kOk);
 600 }
 601
 602 void UpdateExtensionSwitch(Switches* switches,
 603                            const char name[],
 604                            const base::FilePath::StringType& extension) {
 605   base::FilePath::StringType value = switches->GetSwitchValueNative(name);
 606   if (value.length())
 607     value += FILE_PATH_LITERAL(",");
 608   value += extension;
 609   switches->SetSwitch(name, value);
 610 }
 611
 612 Status ProcessExtensions(const std::vector<std::string>& extensions,
 613                          const base::FilePath& temp_dir,
 614                          bool include_automation_extension,
 615                          Switches* switches,
 616                          std::vector<std::string>* bg_pages) {
 617   std::vector<std::string> bg_pages_tmp;
 618   std::vector<base::FilePath::StringType> extension_paths;
 619   for (size_t i = 0; i < extensions.size(); ++i) {
 620     base::FilePath path;
 621     std::string bg_page;
 622     Status status = ProcessExtension(extensions[i], temp_dir, &path, &bg_page);
 623     if (status.IsError()) {
 624       return Status(
 625           kUnknownError,
 626           base::StringPrintf("cannot process extension #%" PRIuS, i + 1),
 627           status);
 628     }
 629     extension_paths.push_back(path.value());
 630     if (bg_page.length())
 631       bg_pages_tmp.push_back(bg_page);
 632   }
 633
 634   if (include_automation_extension) {
 635     base::FilePath automation_extension;
 636     Status status = UnpackAutomationExtension(temp_dir, &automation_extension);
 637     if (status.IsError())
 638       return status;
 639     if (switches->HasSwitch("disable-extensions")) {
 640       UpdateExtensionSwitch(switches, "load-component-extension",
 641                             automation_extension.value());
 642     } else {
 643       extension_paths.push_back(automation_extension.value());
 644     }
 645   }
 646
 647   if (extension_paths.size()) {
 648     base::FilePath::StringType extension_paths_value = JoinString(
 649         extension_paths, FILE_PATH_LITERAL(','));
 650     UpdateExtensionSwitch(switches, "load-extension", extension_paths_value);
 651   }
 652   bg_pages->swap(bg_pages_tmp);
 653   return Status(kOk);
 654 }
 655
 656 Status WritePrefsFile(
 657     const std::string& template_string,
 658     const base::DictionaryValue* custom_prefs,
 659     const base::FilePath& path) {
 660   int code;
 661   std::string error_msg;
 662   scoped_ptr<base::Value> template_value(base::JSONReader::ReadAndReturnError(
 663           template_string, 0, &code, &error_msg));
 664   base::DictionaryValue* prefs;
 665   if (!template_value || !template_value->GetAsDictionary(&prefs)) {
 666     return Status(kUnknownError,
 667                   "cannot parse internal JSON template: " + error_msg);
 668   }
 669
 670   if (custom_prefs) {
 671     for (base::DictionaryValue::Iterator it(*custom_prefs); !it.IsAtEnd();
 672          it.Advance()) {
 673       prefs->Set(it.key(), it.value().DeepCopy());
 674     }
 675   }
 676
 677   std::string prefs_str;
 678   base::JSONWriter::Write(prefs, &prefs_str);
 679   VLOG(0) << "Populating " << path.BaseName().value()
 680           << " file: " << PrettyPrintValue(*prefs);
 681   if (static_cast<int>(prefs_str.length()) != base::WriteFile(
 682           path, prefs_str.c_str(), prefs_str.length())) {
 683     return Status(kUnknownError, "failed to write prefs file");
 684   }
 685   return Status(kOk);
 686 }
 687
 688 Status PrepareUserDataDir(
 689     const base::FilePath& user_data_dir,
 690     const base::DictionaryValue* custom_prefs,
 691     const base::DictionaryValue* custom_local_state) {
 692   base::FilePath default_dir =
 693       user_data_dir.AppendASCII(chrome::kInitialProfile);
 694   if (!base::CreateDirectory(default_dir))
 695     return Status(kUnknownError, "cannot create default profile directory");
 696
 697   Status status =
 698       WritePrefsFile(kPreferences,
 699                      custom_prefs,
 700                      default_dir.Append(chrome::kPreferencesFilename));
 701   if (status.IsError())
 702     return status;
 703
 704   status = WritePrefsFile(kLocalState,
 705                           custom_local_state,
 706                           user_data_dir.Append(chrome::kLocalStateFilename));
 707   if (status.IsError())
 708     return status;
 709
 710   // Write empty "First Run" file, otherwise Chrome will wipe the default
 711   // profile that was written.
 712   if (base::WriteFile(
 713           user_data_dir.Append(chrome::kFirstRunSentinel), "", 0) != 0) {
 714     return Status(kUnknownError, "failed to write first run file");
 715   }
 716   return Status(kOk);
 717 }
 718
 719 }  // namespace internal