src/chrome/browser/media_galleries/fileapi/safe_iapps_library_parser.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 "chrome/browser/media_galleries/fileapi/safe_iapps_library_parser.h"
   6
   7 #include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
   8 #include "chrome/common/chrome_utility_messages.h"
   9 #include "content/public/browser/browser_thread.h"
  10 #include "content/public/browser/child_process_data.h"
  11 #include "ipc/ipc_platform_file.h"
  12
  13 using content::BrowserThread;
  14 using content::UtilityProcessHost;
  15
  16 namespace iapps {
  17
  18 SafeIAppsLibraryParser::SafeIAppsLibraryParser()
  19     : parser_state_(INITIAL_STATE) {}
  20
  21 void SafeIAppsLibraryParser::ParseIPhotoLibrary(
  22     const base::FilePath& library_file,
  23     const IPhotoParserCallback& callback) {
  24   library_file_ = library_file;
  25   iphoto_callback_ = callback;
  26   Start();
  27 }
  28
  29 void SafeIAppsLibraryParser::ParseITunesLibrary(
  30     const base::FilePath& library_file,
  31     const ITunesParserCallback& callback) {
  32   library_file_ = library_file;
  33   itunes_callback_ = callback;
  34   Start();
  35 }
  36
  37 void SafeIAppsLibraryParser::Start() {
  38   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
  39
  40   // |library_platform_file_| will be closed on the IO thread once it
  41   // has been handed off to the child process.
  42   library_platform_file_ = base::CreatePlatformFile(
  43       library_file_,
  44       base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
  45       NULL,   // created
  46       NULL);  // error_code
  47   if (library_platform_file_ == base::kInvalidPlatformFileValue) {
  48     VLOG(1) << "Could not open iApps library XML file: "
  49             << library_file_.value();
  50     BrowserThread::PostTask(
  51         BrowserThread::IO, FROM_HERE,
  52         base::Bind(&SafeIAppsLibraryParser::OnOpenLibraryFileFailed, this));
  53     return;
  54   }
  55
  56   BrowserThread::PostTask(
  57       BrowserThread::IO, FROM_HERE,
  58       base::Bind(&SafeIAppsLibraryParser::StartProcessOnIOThread, this));
  59 }
  60
  61 SafeIAppsLibraryParser::~SafeIAppsLibraryParser() {}
  62
  63 void SafeIAppsLibraryParser::StartProcessOnIOThread() {
  64   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  65   DCHECK_EQ(INITIAL_STATE, parser_state_);
  66
  67   scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
  68       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
  69   utility_process_host_ =
  70       UtilityProcessHost::Create(this, message_loop_proxy.get())->AsWeakPtr();
  71   // Wait for the startup notification before sending the main IPC to the
  72   // utility process, so that we can dup the file handle.
  73   utility_process_host_->Send(new ChromeUtilityMsg_StartupPing);
  74   parser_state_ = PINGED_UTILITY_PROCESS_STATE;
  75 }
  76
  77 void SafeIAppsLibraryParser::OnUtilityProcessStarted() {
  78   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  79   if (parser_state_ != PINGED_UTILITY_PROCESS_STATE)
  80     return;
  81
  82   if (utility_process_host_->GetData().handle == base::kNullProcessHandle) {
  83     DLOG(ERROR) << "Child process handle is null";
  84     OnError();
  85     return;
  86   }
  87
  88   if (!itunes_callback_.is_null()) {
  89     utility_process_host_->Send(
  90         new ChromeUtilityMsg_ParseITunesLibraryXmlFile(
  91             IPC::GetFileHandleForProcess(
  92                 library_platform_file_,
  93                 utility_process_host_->GetData().handle,
  94                 true /* close_source_handle */)));
  95   } else if (!iphoto_callback_.is_null()) {
  96 #if defined(OS_MACOSX)
  97     utility_process_host_->Send(
  98         new ChromeUtilityMsg_ParseIPhotoLibraryXmlFile(
  99             IPC::GetFileHandleForProcess(
 100                 library_platform_file_,
 101                 utility_process_host_->GetData().handle,
 102                 true /* close_source_handle */)));
 103 #endif
 104   }
 105
 106   parser_state_ = STARTED_PARSING_STATE;
 107 }
 108
 109 #if defined(OS_MACOSX)
 110 void SafeIAppsLibraryParser::OnGotIPhotoLibrary(
 111     bool result, const iphoto::parser::Library& library) {
 112   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 113   DCHECK(!iphoto_callback_.is_null());
 114
 115   if (parser_state_ != STARTED_PARSING_STATE)
 116     return;
 117
 118   MediaFileSystemBackend::MediaTaskRunner()->PostTask(
 119       FROM_HERE,
 120       base::Bind(iphoto_callback_, result, library));
 121   parser_state_ = FINISHED_PARSING_STATE;
 122 }
 123 #endif
 124
 125 void SafeIAppsLibraryParser::OnGotITunesLibrary(
 126     bool result, const itunes::parser::Library& library) {
 127   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 128   DCHECK(!itunes_callback_.is_null());
 129
 130   if (parser_state_ != STARTED_PARSING_STATE)
 131     return;
 132
 133   MediaFileSystemBackend::MediaTaskRunner()->PostTask(
 134       FROM_HERE,
 135       base::Bind(itunes_callback_, result, library));
 136   parser_state_ = FINISHED_PARSING_STATE;
 137 }
 138
 139 void SafeIAppsLibraryParser::OnOpenLibraryFileFailed() {
 140   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 141   OnError();
 142 }
 143
 144 void SafeIAppsLibraryParser::OnProcessCrashed(int exit_code) {
 145   OnError();
 146 }
 147
 148 void SafeIAppsLibraryParser::OnError() {
 149   parser_state_ = FINISHED_PARSING_STATE;
 150   if (!itunes_callback_.is_null())
 151     OnGotITunesLibrary(false /* failed */, itunes::parser::Library());
 152
 153 #if defined(OS_MACOSX)
 154   if (!iphoto_callback_.is_null())
 155     OnGotIPhotoLibrary(false /* failed */, iphoto::parser::Library());
 156 #endif
 157 }
 158
 159 bool SafeIAppsLibraryParser::OnMessageReceived(
 160     const IPC::Message& message) {
 161   bool handled = true;
 162   IPC_BEGIN_MESSAGE_MAP(SafeIAppsLibraryParser, message)
 163     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ProcessStarted,
 164                         OnUtilityProcessStarted)
 165 #if defined(OS_MACOSX)
 166     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GotIPhotoLibrary,
 167                         OnGotIPhotoLibrary)
 168 #endif
 169     IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_GotITunesLibrary,
 170                         OnGotITunesLibrary)
 171     IPC_MESSAGE_UNHANDLED(handled = false)
 172   IPC_END_MESSAGE_MAP()
 173   return handled;
 174 }
 175
 176 }  // namespace iapps