src/chrome/service/service_utility_process_host.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 "chrome/service/service_utility_process_host.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/file_util.h"
  10 #include "base/files/scoped_temp_dir.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/message_loop/message_loop_proxy.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/process/kill.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "chrome/common/chrome_switches.h"
  18 #include "chrome/common/chrome_utility_messages.h"
  19 #include "content/public/common/child_process_host.h"
  20 #include "content/public/common/result_codes.h"
  21 #include "content/public/common/sandbox_init.h"
  22 #include "ipc/ipc_switches.h"
  23 #include "printing/page_range.h"
  24 #include "ui/base/ui_base_switches.h"
  25 #include "ui/gfx/rect.h"
  26
  27 #if defined(OS_WIN)
  28 #include "base/files/file_path.h"
  29 #include "base/memory/scoped_ptr.h"
  30 #include "base/process/launch.h"
  31 #include "base/win/scoped_handle.h"
  32 #include "content/public/common/sandbox_init.h"
  33 #include "content/public/common/sandboxed_process_launcher_delegate.h"
  34 #include "printing/emf_win.h"
  35
  36 namespace {
  37
  38 // NOTE: changes to this class need to be reviewed by the security team.
  39 class ServiceSandboxedProcessLauncherDelegate
  40     : public content::SandboxedProcessLauncherDelegate {
  41  public:
  42   explicit ServiceSandboxedProcessLauncherDelegate(
  43       const base::FilePath& exposed_dir)
  44     : exposed_dir_(exposed_dir) {
  45   }
  46
  47   virtual void PreSandbox(bool* disable_default_policy,
  48                           base::FilePath* exposed_dir) OVERRIDE {
  49     *exposed_dir = exposed_dir_;
  50   }
  51
  52  private:
  53   base::FilePath exposed_dir_;
  54 };
  55
  56 }  // namespace
  57
  58 #endif  // OS_WIN
  59
  60 using content::ChildProcessHost;
  61
  62 namespace {
  63 enum ServiceUtilityProcessHostEvent {
  64   SERVICE_UTILITY_STARTED,
  65   SERVICE_UTILITY_DISCONNECTED,
  66   SERVICE_UTILITY_METAFILE_REQUEST,
  67   SERVICE_UTILITY_METAFILE_SUCCEEDED,
  68   SERVICE_UTILITY_METAFILE_FAILED,
  69   SERVICE_UTILITY_CAPS_REQUEST,
  70   SERVICE_UTILITY_CAPS_SUCCEEDED,
  71   SERVICE_UTILITY_CAPS_FAILED,
  72   SERVICE_UTILITY_SEMANTIC_CAPS_REQUEST,
  73   SERVICE_UTILITY_SEMANTIC_CAPS_SUCCEEDED,
  74   SERVICE_UTILITY_SEMANTIC_CAPS_FAILED,
  75   SERVICE_UTILITY_EVENT_MAX,
  76 };
  77 }  // namespace
  78
  79 ServiceUtilityProcessHost::ServiceUtilityProcessHost(
  80     Client* client, base::MessageLoopProxy* client_message_loop_proxy)
  81         : handle_(base::kNullProcessHandle),
  82           client_(client),
  83           client_message_loop_proxy_(client_message_loop_proxy),
  84           waiting_for_reply_(false) {
  85   child_process_host_.reset(ChildProcessHost::Create(this));
  86 }
  87
  88 ServiceUtilityProcessHost::~ServiceUtilityProcessHost() {
  89   // We need to kill the child process when the host dies.
  90   base::KillProcess(handle_, content::RESULT_CODE_NORMAL_EXIT, false);
  91 }
  92
  93 bool ServiceUtilityProcessHost::StartRenderPDFPagesToMetafile(
  94     const base::FilePath& pdf_path,
  95     const printing::PdfRenderSettings& render_settings,
  96     const std::vector<printing::PageRange>& page_ranges) {
  97   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
  98                             SERVICE_UTILITY_METAFILE_REQUEST,
  99                             SERVICE_UTILITY_EVENT_MAX);
 100   start_time_ = base::Time::Now();
 101 #if !defined(OS_WIN)
 102   // This is only implemented on Windows (because currently it is only needed
 103   // on Windows). Will add implementations on other platforms when needed.
 104   NOTIMPLEMENTED();
 105   return false;
 106 #else  // !defined(OS_WIN)
 107   scratch_metafile_dir_.reset(new base::ScopedTempDir);
 108   if (!scratch_metafile_dir_->CreateUniqueTempDir())
 109     return false;
 110   if (!base::CreateTemporaryFileInDir(scratch_metafile_dir_->path(),
 111                                       &metafile_path_)) {
 112     return false;
 113   }
 114
 115   if (!StartProcess(false, scratch_metafile_dir_->path()))
 116     return false;
 117
 118   base::win::ScopedHandle pdf_file(
 119       ::CreateFile(pdf_path.value().c_str(),
 120                    GENERIC_READ,
 121                    FILE_SHARE_READ | FILE_SHARE_WRITE,
 122                    NULL,
 123                    OPEN_EXISTING,
 124                    FILE_ATTRIBUTE_NORMAL,
 125                    NULL));
 126   if (pdf_file == INVALID_HANDLE_VALUE)
 127     return false;
 128   HANDLE pdf_file_in_utility_process = NULL;
 129   ::DuplicateHandle(::GetCurrentProcess(), pdf_file, handle(),
 130                     &pdf_file_in_utility_process, 0, false,
 131                     DUPLICATE_SAME_ACCESS);
 132   if (!pdf_file_in_utility_process)
 133     return false;
 134   DCHECK(!waiting_for_reply_);
 135   waiting_for_reply_ = true;
 136   return child_process_host_->Send(
 137       new ChromeUtilityMsg_RenderPDFPagesToMetafile(
 138           pdf_file_in_utility_process,
 139           metafile_path_,
 140           render_settings,
 141           page_ranges));
 142 #endif  // !defined(OS_WIN)
 143 }
 144
 145 bool ServiceUtilityProcessHost::StartGetPrinterCapsAndDefaults(
 146     const std::string& printer_name) {
 147   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 148                             SERVICE_UTILITY_CAPS_REQUEST,
 149                             SERVICE_UTILITY_EVENT_MAX);
 150   start_time_ = base::Time::Now();
 151   base::FilePath exposed_path;
 152   if (!StartProcess(true, exposed_path))
 153     return false;
 154   DCHECK(!waiting_for_reply_);
 155   waiting_for_reply_ = true;
 156   return child_process_host_->Send(
 157       new ChromeUtilityMsg_GetPrinterCapsAndDefaults(printer_name));
 158 }
 159
 160 bool ServiceUtilityProcessHost::StartGetPrinterSemanticCapsAndDefaults(
 161     const std::string& printer_name) {
 162   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 163                             SERVICE_UTILITY_SEMANTIC_CAPS_REQUEST,
 164                             SERVICE_UTILITY_EVENT_MAX);
 165   start_time_ = base::Time::Now();
 166   base::FilePath exposed_path;
 167   if (!StartProcess(true, exposed_path))
 168     return false;
 169   DCHECK(!waiting_for_reply_);
 170   waiting_for_reply_ = true;
 171   return child_process_host_->Send(
 172       new ChromeUtilityMsg_GetPrinterSemanticCapsAndDefaults(printer_name));
 173 }
 174
 175 bool ServiceUtilityProcessHost::StartProcess(
 176     bool no_sandbox,
 177     const base::FilePath& exposed_dir) {
 178   std::string channel_id = child_process_host_->CreateChannel();
 179   if (channel_id.empty())
 180     return false;
 181
 182   base::FilePath exe_path = GetUtilityProcessCmd();
 183   if (exe_path.empty()) {
 184     NOTREACHED() << "Unable to get utility process binary name.";
 185     return false;
 186   }
 187
 188   CommandLine cmd_line(exe_path);
 189   cmd_line.AppendSwitchASCII(switches::kProcessType, switches::kUtilityProcess);
 190   cmd_line.AppendSwitchASCII(switches::kProcessChannelID, channel_id);
 191   cmd_line.AppendSwitch(switches::kLang);
 192
 193   if (Launch(&cmd_line, no_sandbox, exposed_dir)) {
 194     UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 195                               SERVICE_UTILITY_STARTED,
 196                               SERVICE_UTILITY_EVENT_MAX);
 197     return true;
 198   }
 199   return false;
 200 }
 201
 202 bool ServiceUtilityProcessHost::Launch(CommandLine* cmd_line,
 203                                        bool no_sandbox,
 204                                        const base::FilePath& exposed_dir) {
 205 #if !defined(OS_WIN)
 206   // TODO(sanjeevr): Implement for non-Windows OSes.
 207   NOTIMPLEMENTED();
 208   return false;
 209 #else  // !defined(OS_WIN)
 210
 211   if (no_sandbox) {
 212     base::ProcessHandle process = base::kNullProcessHandle;
 213     cmd_line->AppendSwitch(switches::kNoSandbox);
 214     base::LaunchProcess(*cmd_line, base::LaunchOptions(), &handle_);
 215   } else {
 216     ServiceSandboxedProcessLauncherDelegate delegate(exposed_dir);
 217     handle_ = content::StartSandboxedProcess(&delegate, cmd_line);
 218   }
 219   return (handle_ != base::kNullProcessHandle);
 220 #endif  // !defined(OS_WIN)
 221 }
 222
 223 base::FilePath ServiceUtilityProcessHost::GetUtilityProcessCmd() {
 224 #if defined(OS_LINUX)
 225   int flags = ChildProcessHost::CHILD_ALLOW_SELF;
 226 #else
 227   int flags = ChildProcessHost::CHILD_NORMAL;
 228 #endif
 229   return ChildProcessHost::GetChildPath(flags);
 230 }
 231
 232 void ServiceUtilityProcessHost::OnChildDisconnected() {
 233   if (waiting_for_reply_) {
 234     // If we are yet to receive a reply then notify the client that the
 235     // child died.
 236     client_message_loop_proxy_->PostTask(
 237         FROM_HERE, base::Bind(&Client::OnChildDied, client_.get()));
 238     UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 239                               SERVICE_UTILITY_DISCONNECTED,
 240                               SERVICE_UTILITY_EVENT_MAX);
 241     UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilityDisconnectTime",
 242                         base::Time::Now() - start_time_);
 243   }
 244   delete this;
 245 }
 246
 247 bool ServiceUtilityProcessHost::OnMessageReceived(const IPC::Message& message) {
 248   bool handled = true;
 249   IPC_BEGIN_MESSAGE_MAP(ServiceUtilityProcessHost, message)
 250     IPC_MESSAGE_HANDLER(
 251         ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Succeeded,
 252         OnRenderPDFPagesToMetafileSucceeded)
 253     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Failed,
 254                         OnRenderPDFPagesToMetafileFailed)
 255     IPC_MESSAGE_HANDLER(
 256         ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded,
 257         OnGetPrinterCapsAndDefaultsSucceeded)
 258     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Failed,
 259                         OnGetPrinterCapsAndDefaultsFailed)
 260     IPC_MESSAGE_HANDLER(
 261         ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Succeeded,
 262         OnGetPrinterSemanticCapsAndDefaultsSucceeded)
 263     IPC_MESSAGE_HANDLER(
 264         ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Failed,
 265         OnGetPrinterSemanticCapsAndDefaultsFailed)
 266     IPC_MESSAGE_UNHANDLED(handled = false)
 267   IPC_END_MESSAGE_MAP()
 268   return handled;
 269 }
 270
 271 base::ProcessHandle ServiceUtilityProcessHost::GetHandle() const {
 272   return handle_;
 273 }
 274
 275 void ServiceUtilityProcessHost::OnRenderPDFPagesToMetafileSucceeded(
 276     int highest_rendered_page_number,
 277     double scale_factor) {
 278   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 279                             SERVICE_UTILITY_METAFILE_SUCCEEDED,
 280                             SERVICE_UTILITY_EVENT_MAX);
 281   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilityMetafileTime",
 282                       base::Time::Now() - start_time_);
 283   DCHECK(waiting_for_reply_);
 284   waiting_for_reply_ = false;
 285   // If the metafile was successfully created, we need to take our hands off the
 286   // scratch metafile directory. The client will delete it when it is done with
 287   // metafile.
 288   scratch_metafile_dir_->Take();
 289   client_message_loop_proxy_->PostTask(
 290       FROM_HERE,
 291       base::Bind(&Client::MetafileAvailable, client_.get(), metafile_path_,
 292                  highest_rendered_page_number, scale_factor));
 293 }
 294
 295 void ServiceUtilityProcessHost::OnRenderPDFPagesToMetafileFailed() {
 296   DCHECK(waiting_for_reply_);
 297   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 298                             SERVICE_UTILITY_METAFILE_FAILED,
 299                             SERVICE_UTILITY_EVENT_MAX);
 300   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilityMetafileFailTime",
 301                       base::Time::Now() - start_time_);
 302   waiting_for_reply_ = false;
 303   client_message_loop_proxy_->PostTask(
 304       FROM_HERE,
 305       base::Bind(&Client::OnRenderPDFPagesToMetafileFailed, client_.get()));
 306 }
 307
 308 void ServiceUtilityProcessHost::OnGetPrinterCapsAndDefaultsSucceeded(
 309     const std::string& printer_name,
 310     const printing::PrinterCapsAndDefaults& caps_and_defaults) {
 311   DCHECK(waiting_for_reply_);
 312   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 313                             SERVICE_UTILITY_CAPS_SUCCEEDED,
 314                             SERVICE_UTILITY_EVENT_MAX);
 315   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilityCapsTime",
 316                       base::Time::Now() - start_time_);
 317   waiting_for_reply_ = false;
 318   client_message_loop_proxy_->PostTask(
 319       FROM_HERE,
 320       base::Bind(&Client::OnGetPrinterCapsAndDefaults, client_.get(), true,
 321                  printer_name, caps_and_defaults));
 322 }
 323
 324 void ServiceUtilityProcessHost::OnGetPrinterSemanticCapsAndDefaultsSucceeded(
 325     const std::string& printer_name,
 326     const printing::PrinterSemanticCapsAndDefaults& caps_and_defaults) {
 327   DCHECK(waiting_for_reply_);
 328   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 329                             SERVICE_UTILITY_SEMANTIC_CAPS_SUCCEEDED,
 330                             SERVICE_UTILITY_EVENT_MAX);
 331   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilitySemanticCapsTime",
 332                       base::Time::Now() - start_time_);
 333   waiting_for_reply_ = false;
 334   client_message_loop_proxy_->PostTask(
 335       FROM_HERE,
 336       base::Bind(&Client::OnGetPrinterSemanticCapsAndDefaults, client_.get(),
 337                  true, printer_name, caps_and_defaults));
 338 }
 339
 340 void ServiceUtilityProcessHost::OnGetPrinterCapsAndDefaultsFailed(
 341     const std::string& printer_name) {
 342   DCHECK(waiting_for_reply_);
 343   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 344                             SERVICE_UTILITY_CAPS_FAILED,
 345                             SERVICE_UTILITY_EVENT_MAX);
 346   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilityCapsFailTime",
 347                       base::Time::Now() - start_time_);
 348   waiting_for_reply_ = false;
 349   client_message_loop_proxy_->PostTask(
 350       FROM_HERE,
 351       base::Bind(&Client::OnGetPrinterCapsAndDefaults, client_.get(), false,
 352                  printer_name, printing::PrinterCapsAndDefaults()));
 353 }
 354
 355 void ServiceUtilityProcessHost::OnGetPrinterSemanticCapsAndDefaultsFailed(
 356     const std::string& printer_name) {
 357   DCHECK(waiting_for_reply_);
 358   UMA_HISTOGRAM_ENUMERATION("CloudPrint.ServiceUtilityProcessHostEvent",
 359                             SERVICE_UTILITY_SEMANTIC_CAPS_FAILED,
 360                             SERVICE_UTILITY_EVENT_MAX);
 361   UMA_HISTOGRAM_TIMES("CloudPrint.ServiceUtilitySemanticCapsFailTime",
 362                       base::Time::Now() - start_time_);
 363   waiting_for_reply_ = false;
 364   client_message_loop_proxy_->PostTask(
 365       FROM_HERE,
 366       base::Bind(&Client::OnGetPrinterSemanticCapsAndDefaults,
 367                  client_.get(), false, printer_name,
 368                  printing::PrinterSemanticCapsAndDefaults()));
 369 }
 370
 371 void ServiceUtilityProcessHost::Client::MetafileAvailable(
 372     const base::FilePath& metafile_path,
 373     int highest_rendered_page_number,
 374     double scale_factor) {
 375   // The metafile was created in a temp folder which needs to get deleted after
 376   // we have processed it.
 377   base::ScopedTempDir scratch_metafile_dir;
 378   if (!scratch_metafile_dir.Set(metafile_path.DirName()))
 379     LOG(WARNING) << "Unable to set scratch metafile directory";
 380 #if defined(OS_WIN)
 381   // It's important that metafile is declared after scratch_metafile_dir so
 382   // that the metafile destructor closes the file before the base::ScopedTempDir
 383   // destructor tries to remove the directory.
 384   printing::Emf metafile;
 385   if (!metafile.InitFromFile(metafile_path)) {
 386     OnRenderPDFPagesToMetafileFailed();
 387   } else {
 388     OnRenderPDFPagesToMetafileSucceeded(metafile,
 389                                         highest_rendered_page_number,
 390                                         scale_factor);
 391   }
 392 #endif  // defined(OS_WIN)
 393 }
 394