src/cloud_print/service/win/chrome_launcher.cc

   1 // Copyright (c) 2012 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 "cloud_print/service/win/chrome_launcher.h"
   6
   7 #include "base/base_switches.h"
   8 #include "base/command_line.h"
   9 #include "base/files/file_util.h"
  10 #include "base/files/scoped_temp_dir.h"
  11 #include "base/json/json_reader.h"
  12 #include "base/json/json_writer.h"
  13 #include "base/process/kill.h"
  14 #include "base/process/process.h"
  15 #include "base/values.h"
  16 #include "base/win/registry.h"
  17 #include "base/win/scoped_handle.h"
  18 #include "base/win/scoped_process_information.h"
  19 #include "chrome/common/chrome_constants.h"
  20 #include "chrome/common/chrome_switches.h"
  21 #include "chrome/common/pref_names.h"
  22 #include "chrome/installer/launcher_support/chrome_launcher_support.h"
  23 #include "cloud_print/common/win/cloud_print_utils.h"
  24 #include "cloud_print/service/service_constants.h"
  25 #include "cloud_print/service/win/service_utils.h"
  26 #include "components/cloud_devices/common/cloud_devices_urls.h"
  27 #include "google_apis/gaia/gaia_urls.h"
  28 #include "net/base/url_util.h"
  29 #include "url/gurl.h"
  30
  31 namespace {
  32
  33 const int kShutdownTimeoutMs = 30 * 1000;
  34 const int kUsageUpdateTimeoutMs = 6 * 3600 * 1000;  // 6 hours.
  35
  36 static const base::char16 kAutoRunKeyPath[] =
  37     L"Software\\Microsoft\\Windows\\CurrentVersion\\Run";
  38
  39 // Terminates any process.
  40 void ShutdownChrome(HANDLE process, DWORD thread_id) {
  41   if (::PostThreadMessage(thread_id, WM_QUIT, 0, 0) &&
  42       WAIT_OBJECT_0 == ::WaitForSingleObject(process, kShutdownTimeoutMs)) {
  43     return;
  44   }
  45   LOG(ERROR) << "Failed to shutdown process.";
  46   base::KillProcess(process, 0, true);
  47 }
  48
  49 BOOL CALLBACK CloseIfPidEqual(HWND wnd, LPARAM lparam) {
  50   DWORD pid = 0;
  51   ::GetWindowThreadProcessId(wnd, &pid);
  52   if (pid == static_cast<DWORD>(lparam))
  53     ::PostMessage(wnd, WM_CLOSE, 0, 0);
  54   return TRUE;
  55 }
  56
  57 void CloseAllProcessWindows(HANDLE process) {
  58   ::EnumWindows(&CloseIfPidEqual, GetProcessId(process));
  59 }
  60
  61 // Close Chrome browser window.
  62 void CloseChrome(HANDLE process, DWORD thread_id) {
  63   CloseAllProcessWindows(process);
  64   if (WAIT_OBJECT_0 == ::WaitForSingleObject(process, kShutdownTimeoutMs)) {
  65     return;
  66   }
  67   ShutdownChrome(process, thread_id);
  68 }
  69
  70 bool LaunchProcess(const CommandLine& cmdline,
  71                    base::win::ScopedHandle* process_handle,
  72                    DWORD* thread_id) {
  73   STARTUPINFO startup_info = {};
  74   startup_info.cb = sizeof(startup_info);
  75   startup_info.dwFlags = STARTF_USESHOWWINDOW;
  76   startup_info.wShowWindow = SW_SHOW;
  77
  78   PROCESS_INFORMATION temp_process_info = {};
  79   base::FilePath::StringType writable_cmdline_str(
  80       cmdline.GetCommandLineString());
  81   if (!CreateProcess(NULL,
  82       &writable_cmdline_str[0], NULL, NULL,
  83       FALSE, 0, NULL, NULL, &startup_info, &temp_process_info)) {
  84     return false;
  85   }
  86   base::win::ScopedProcessInformation process_info(temp_process_info);
  87
  88   if (process_handle)
  89     process_handle->Set(process_info.TakeProcessHandle());
  90
  91   if (thread_id)
  92     *thread_id = process_info.thread_id();
  93
  94   return true;
  95 }
  96
  97 std::string ReadAndUpdateServiceState(const base::FilePath& directory,
  98                                       const std::string& proxy_id) {
  99   std::string json;
 100   base::FilePath file_path = directory.Append(chrome::kServiceStateFileName);
 101   if (!base::ReadFileToString(file_path, &json)) {
 102     return std::string();
 103   }
 104
 105   scoped_ptr<base::Value> service_state(base::JSONReader::Read(json));
 106   base::DictionaryValue* dictionary = NULL;
 107   if (!service_state->GetAsDictionary(&dictionary) || !dictionary) {
 108     return std::string();
 109   }
 110
 111   bool enabled = false;
 112   if (!dictionary->GetBoolean(prefs::kCloudPrintProxyEnabled, &enabled) ||
 113       !enabled) {
 114     return std::string();
 115   }
 116
 117   std::string refresh_token;
 118   if (!dictionary->GetString(prefs::kCloudPrintRobotRefreshToken,
 119                              &refresh_token) ||
 120       refresh_token.empty()) {
 121     return std::string();
 122   }
 123
 124   // Remove everything except kCloudPrintRoot.
 125   scoped_ptr<base::Value> cloud_print_root;
 126   dictionary->Remove(prefs::kCloudPrintRoot, &cloud_print_root);
 127   dictionary->Clear();
 128   dictionary->Set(prefs::kCloudPrintRoot, cloud_print_root.release());
 129
 130   dictionary->SetBoolean(prefs::kCloudPrintXmppPingEnabled, true);
 131   if (!proxy_id.empty())  // Reuse proxy id if we already had one.
 132     dictionary->SetString(prefs::kCloudPrintProxyId, proxy_id);
 133   std::string result;
 134   base::JSONWriter::WriteWithOptions(dictionary,
 135                                      base::JSONWriter::OPTIONS_PRETTY_PRINT,
 136                                      &result);
 137   return result;
 138 }
 139
 140 void DeleteAutorunKeys(const base::FilePath& user_data_dir) {
 141   base::win::RegKey key(HKEY_CURRENT_USER, kAutoRunKeyPath, KEY_SET_VALUE);
 142   if (!key.Valid())
 143     return;
 144   std::vector<base::string16> to_delete;
 145
 146   base::FilePath abs_user_data_dir = base::MakeAbsoluteFilePath(user_data_dir);
 147
 148   {
 149     base::win::RegistryValueIterator value(HKEY_CURRENT_USER, kAutoRunKeyPath);
 150     for (; value.Valid(); ++value) {
 151       if (value.Type() == REG_SZ && value.Value()) {
 152         CommandLine cmd = CommandLine::FromString(value.Value());
 153         if (cmd.GetSwitchValueASCII(switches::kProcessType) ==
 154             switches::kServiceProcess &&
 155             cmd.HasSwitch(switches::kUserDataDir)) {
 156           base::FilePath path_from_reg = base::MakeAbsoluteFilePath(
 157               cmd.GetSwitchValuePath(switches::kUserDataDir));
 158           if (path_from_reg == abs_user_data_dir) {
 159             to_delete.push_back(value.Name());
 160           }
 161         }
 162       }
 163     }
 164   }
 165
 166   for (size_t i = 0; i < to_delete.size(); ++i) {
 167     key.DeleteValue(to_delete[i].c_str());
 168   }
 169 }
 170
 171 }  // namespace
 172
 173 ChromeLauncher::ChromeLauncher(const base::FilePath& user_data)
 174     : stop_event_(true, true),
 175       user_data_(user_data) {
 176 }
 177
 178 ChromeLauncher::~ChromeLauncher() {
 179 }
 180
 181 bool ChromeLauncher::Start() {
 182   DeleteAutorunKeys(user_data_);
 183   stop_event_.Reset();
 184   thread_.reset(new base::DelegateSimpleThread(this, "chrome_launcher"));
 185   thread_->Start();
 186   return true;
 187 }
 188
 189 void ChromeLauncher::Stop() {
 190   stop_event_.Signal();
 191   thread_->Join();
 192   thread_.reset();
 193 }
 194
 195 void ChromeLauncher::Run() {
 196   const base::TimeDelta default_time_out = base::TimeDelta::FromSeconds(1);
 197   const base::TimeDelta max_time_out = base::TimeDelta::FromHours(1);
 198
 199   for (base::TimeDelta time_out = default_time_out;;
 200        time_out = std::min(time_out * 2, max_time_out)) {
 201     base::FilePath chrome_path = chrome_launcher_support::GetAnyChromePath();
 202
 203     if (!chrome_path.empty()) {
 204       CommandLine cmd(chrome_path);
 205       CopyChromeSwitchesFromCurrentProcess(&cmd);
 206
 207       // Required switches.
 208       cmd.AppendSwitchASCII(switches::kProcessType, switches::kServiceProcess);
 209       cmd.AppendSwitchPath(switches::kUserDataDir, user_data_);
 210       cmd.AppendSwitch(switches::kNoServiceAutorun);
 211
 212       // Optional.
 213       cmd.AppendSwitch(switches::kAutoLaunchAtStartup);
 214       cmd.AppendSwitch(switches::kDisableDefaultApps);
 215       cmd.AppendSwitch(switches::kDisableExtensions);
 216       cmd.AppendSwitch(switches::kDisableGpu);
 217       cmd.AppendSwitch(switches::kDisableSoftwareRasterizer);
 218       cmd.AppendSwitch(switches::kDisableSync);
 219       cmd.AppendSwitch(switches::kNoFirstRun);
 220       cmd.AppendSwitch(switches::kNoStartupWindow);
 221
 222       base::win::ScopedHandle chrome_handle;
 223       base::Time started = base::Time::Now();
 224       DWORD thread_id = 0;
 225       LaunchProcess(cmd, &chrome_handle, &thread_id);
 226
 227       HANDLE handles[] = { stop_event_.handle(), chrome_handle.Get() };
 228       DWORD wait_result = WAIT_TIMEOUT;
 229       while (wait_result == WAIT_TIMEOUT) {
 230         cloud_print::SetGoogleUpdateUsage(kGoogleUpdateId);
 231         wait_result = ::WaitForMultipleObjects(arraysize(handles), handles,
 232                                                FALSE, kUsageUpdateTimeoutMs);
 233       }
 234       if (wait_result == WAIT_OBJECT_0) {
 235         ShutdownChrome(chrome_handle.Get(), thread_id);
 236         break;
 237       } else if (wait_result == WAIT_OBJECT_0 + 1) {
 238         LOG(ERROR) << "Chrome process exited.";
 239       } else {
 240         LOG(ERROR) << "Error waiting Chrome (" << ::GetLastError() << ").";
 241       }
 242       if (base::Time::Now() - started > base::TimeDelta::FromHours(1)) {
 243         // Reset timeout because process worked long enough.
 244         time_out = default_time_out;
 245       }
 246     }
 247     if (stop_event_.TimedWait(time_out))
 248       break;
 249   }
 250 }
 251
 252 std::string ChromeLauncher::CreateServiceStateFile(
 253     const std::string& proxy_id,
 254     const std::vector<std::string>& printers) {
 255   base::ScopedTempDir temp_user_data;
 256   if (!temp_user_data.CreateUniqueTempDir()) {
 257     LOG(ERROR) << "Can't create temp dir.";
 258     return std::string();
 259   }
 260
 261   base::FilePath chrome_path = chrome_launcher_support::GetAnyChromePath();
 262   if (chrome_path.empty()) {
 263     LOG(ERROR) << "Can't find Chrome.";
 264     return std::string();
 265   }
 266
 267   base::FilePath printers_file = temp_user_data.path().Append(L"printers.json");
 268
 269   base::ListValue printer_list;
 270   printer_list.AppendStrings(printers);
 271   std::string printers_json;
 272   base::JSONWriter::Write(&printer_list, &printers_json);
 273   size_t written = base::WriteFile(printers_file,
 274                                    printers_json.c_str(),
 275                                    printers_json.size());
 276   if (written != printers_json.size()) {
 277     LOG(ERROR) << "Can't write file.";
 278     return std::string();
 279   }
 280
 281   CommandLine cmd(chrome_path);
 282   CopyChromeSwitchesFromCurrentProcess(&cmd);
 283   cmd.AppendSwitchPath(switches::kUserDataDir, temp_user_data.path());
 284   cmd.AppendSwitchPath(switches::kCloudPrintSetupProxy, printers_file);
 285   cmd.AppendSwitch(switches::kNoServiceAutorun);
 286
 287   // Optional.
 288   cmd.AppendSwitch(switches::kDisableDefaultApps);
 289   cmd.AppendSwitch(switches::kDisableExtensions);
 290   cmd.AppendSwitch(switches::kDisableSync);
 291   cmd.AppendSwitch(switches::kNoDefaultBrowserCheck);
 292   cmd.AppendSwitch(switches::kNoFirstRun);
 293
 294   cmd.AppendArg(
 295       cloud_devices::GetCloudPrintEnableWithSigninURL(proxy_id).spec());
 296
 297   base::win::ScopedHandle chrome_handle;
 298   DWORD thread_id = 0;
 299   if (!LaunchProcess(cmd, &chrome_handle, &thread_id)) {
 300     LOG(ERROR) << "Unable to launch Chrome.";
 301     return std::string();
 302   }
 303
 304   for (;;) {
 305     DWORD wait_result = ::WaitForSingleObject(chrome_handle.Get(), 500);
 306     std::string json = ReadAndUpdateServiceState(temp_user_data.path(),
 307                                                  proxy_id);
 308     if (wait_result == WAIT_OBJECT_0) {
 309       // Return what we have because browser is closed.
 310       return json;
 311     }
 312     if (wait_result != WAIT_TIMEOUT) {
 313       LOG(ERROR) << "Chrome launch failed.";
 314       return std::string();
 315     }
 316     if (!json.empty()) {
 317       // Close chrome because Service State is ready.
 318       CloseChrome(chrome_handle.Get(), thread_id);
 319       return json;
 320     }
 321   }
 322 }