mojo/runner/context.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 "mojo/runner/context.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/files/file_path.h"
  12 #include "base/lazy_instance.h"
  13 #include "base/macros.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/path_service.h"
  16 #include "base/process/process_info.h"
  17 #include "base/run_loop.h"
  18 #include "base/strings/string_number_conversions.h"
  19 #include "base/strings/string_split.h"
  20 #include "base/strings/string_util.h"
  21 #include "base/trace_event/trace_event.h"
  22 #include "build/build_config.h"
  23 #include "components/devtools_service/public/cpp/switches.h"
  24 #include "components/devtools_service/public/interfaces/devtools_service.mojom.h"
  25 #include "mojo/application/public/cpp/application_connection.h"
  26 #include "mojo/application/public/cpp/application_delegate.h"
  27 #include "mojo/application/public/cpp/application_impl.h"
  28 #include "mojo/common/trace_controller_impl.h"
  29 #include "mojo/common/tracing_impl.h"
  30 #include "mojo/edk/embedder/embedder.h"
  31 #include "mojo/edk/embedder/simple_platform_support.h"
  32 #include "mojo/package_manager/package_manager_impl.h"
  33 #include "mojo/runner/in_process_native_runner.h"
  34 #include "mojo/runner/out_of_process_native_runner.h"
  35 #include "mojo/runner/switches.h"
  36 #include "mojo/services/tracing/public/cpp/switches.h"
  37 #include "mojo/services/tracing/public/interfaces/tracing.mojom.h"
  38 #include "mojo/shell/application_loader.h"
  39 #include "mojo/shell/connect_to_application_params.h"
  40 #include "mojo/shell/query_util.h"
  41 #include "mojo/shell/switches.h"
  42 #include "mojo/util/filename_util.h"
  43 #include "url/gurl.h"
  44
  45 namespace mojo {
  46 namespace runner {
  47 namespace {
  48
  49 // Used to ensure we only init once.
  50 class Setup {
  51  public:
  52   Setup() {
  53     embedder::Init(make_scoped_ptr(new embedder::SimplePlatformSupport()));
  54   }
  55
  56   ~Setup() {}
  57
  58  private:
  59   DISALLOW_COPY_AND_ASSIGN(Setup);
  60 };
  61
  62 void InitContentHandlers(package_manager::PackageManagerImpl* manager,
  63                          const base::CommandLine& command_line) {
  64   // Default content handlers.
  65   manager->RegisterContentHandler("application/pdf", GURL("mojo:pdf_viewer"));
  66   manager->RegisterContentHandler("image/png", GURL("mojo:png_viewer"));
  67   manager->RegisterContentHandler("text/html", GURL("mojo:html_viewer"));
  68   manager->RegisterContentHandler("text/plain", GURL("mojo:html_viewer"));
  69
  70   // Command-line-specified content handlers.
  71   std::string handlers_spec =
  72       command_line.GetSwitchValueASCII(switches::kContentHandlers);
  73   if (handlers_spec.empty())
  74     return;
  75
  76 #if defined(OS_ANDROID)
  77   // TODO(eseidel): On Android we pass command line arguments is via the
  78   // 'parameters' key on the intent, which we specify during 'am shell start'
  79   // via --esa, however that expects comma-separated values and says:
  80   //   am shell --help:
  81   //     [--esa <EXTRA_KEY> <EXTRA_STRING_VALUE>[,<EXTRA_STRING_VALUE...]]
  82   //     (to embed a comma into a string escape it using "\,")
  83   // Whatever takes 'parameters' and constructs a CommandLine is failing to
  84   // un-escape the commas, we need to move this fix to that file.
  85   base::ReplaceSubstringsAfterOffset(&handlers_spec, 0, "\\,", ",");
  86 #endif
  87
  88   std::vector<std::string> parts = base::SplitString(
  89       handlers_spec, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  90   if (parts.size() % 2 != 0) {
  91     LOG(ERROR) << "Invalid value for switch " << switches::kContentHandlers
  92                << ": must be a comma-separated list of mimetype/url pairs."
  93                << handlers_spec;
  94     return;
  95   }
  96
  97   for (size_t i = 0; i < parts.size(); i += 2) {
  98     GURL url(parts[i + 1]);
  99     if (!url.is_valid()) {
 100       LOG(ERROR) << "Invalid value for switch " << switches::kContentHandlers
 101                  << ": '" << parts[i + 1] << "' is not a valid URL.";
 102       return;
 103     }
 104     // TODO(eseidel): We should also validate that the mimetype is valid
 105     // net/base/mime_util.h could do this, but we don't want to depend on net.
 106     manager->RegisterContentHandler(parts[i], url);
 107   }
 108 }
 109
 110 void InitDevToolsServiceIfNeeded(shell::ApplicationManager* manager,
 111                                  const base::CommandLine& command_line) {
 112   if (!command_line.HasSwitch(devtools_service::kRemoteDebuggingPort))
 113     return;
 114
 115   std::string port_str =
 116       command_line.GetSwitchValueASCII(devtools_service::kRemoteDebuggingPort);
 117   unsigned port;
 118   if (!base::StringToUint(port_str, &port) || port > 65535) {
 119     LOG(ERROR) << "Invalid value for switch "
 120                << devtools_service::kRemoteDebuggingPort << ": '" << port_str
 121                << "' is not a valid port number.";
 122     return;
 123   }
 124
 125   ServiceProviderPtr devtools_service_provider;
 126   scoped_ptr<shell::ConnectToApplicationParams> params(
 127       new shell::ConnectToApplicationParams);
 128   params->set_source(shell::Identity(GURL("mojo:shell")));
 129   params->SetTargetURL(GURL("mojo:devtools_service"));
 130   params->set_services(GetProxy(&devtools_service_provider));
 131   manager->ConnectToApplication(params.Pass());
 132
 133   devtools_service::DevToolsCoordinatorPtr devtools_coordinator;
 134   devtools_service_provider->ConnectToService(
 135       devtools_service::DevToolsCoordinator::Name_,
 136       GetProxy(&devtools_coordinator).PassMessagePipe());
 137   devtools_coordinator->Initialize(static_cast<uint16_t>(port));
 138 }
 139
 140 class TracingServiceProvider : public ServiceProvider {
 141  public:
 142   explicit TracingServiceProvider(InterfaceRequest<ServiceProvider> request)
 143       : binding_(this, request.Pass()) {}
 144   ~TracingServiceProvider() override {}
 145
 146   void ConnectToService(const String& service_name,
 147                         ScopedMessagePipeHandle client_handle) override {
 148     if (service_name == tracing::TraceController::Name_) {
 149       new TraceControllerImpl(
 150           MakeRequest<tracing::TraceController>(client_handle.Pass()));
 151     }
 152   }
 153
 154  private:
 155   StrongBinding<ServiceProvider> binding_;
 156
 157   DISALLOW_COPY_AND_ASSIGN(TracingServiceProvider);
 158 };
 159
 160 }  // namespace
 161
 162 Context::Context(const base::FilePath& shell_file_root)
 163     : shell_file_root_(shell_file_root),
 164       package_manager_(nullptr),
 165       main_entry_time_(base::Time::Now()) {}
 166
 167 Context::~Context() {
 168   DCHECK(!base::MessageLoop::current());
 169 }
 170
 171 // static
 172 void Context::EnsureEmbedderIsInitialized() {
 173   static base::LazyInstance<Setup>::Leaky setup = LAZY_INSTANCE_INITIALIZER;
 174   setup.Get();
 175 }
 176
 177 bool Context::Init() {
 178   TRACE_EVENT0("mojo_shell", "Context::Init");
 179   const base::CommandLine& command_line =
 180       *base::CommandLine::ForCurrentProcess();
 181
 182   EnsureEmbedderIsInitialized();
 183   task_runners_.reset(
 184       new TaskRunners(base::MessageLoop::current()->task_runner()));
 185
 186   // TODO(vtl): This should be MASTER, not NONE.
 187   embedder::InitIPCSupport(
 188       embedder::ProcessType::NONE, task_runners_->shell_runner(), this,
 189       task_runners_->io_runner(), embedder::ScopedPlatformHandle());
 190
 191   package_manager_ = new package_manager::PackageManagerImpl(shell_file_root_);
 192   InitContentHandlers(package_manager_, command_line);
 193
 194   application_manager_.reset(
 195       new shell::ApplicationManager(make_scoped_ptr(package_manager_)));
 196
 197   scoped_ptr<shell::NativeRunnerFactory> runner_factory;
 198   if (command_line.HasSwitch(switches::kEnableMultiprocess))
 199     runner_factory.reset(new OutOfProcessNativeRunnerFactory(this));
 200   else
 201     runner_factory.reset(new InProcessNativeRunnerFactory(this));
 202   application_manager_->set_blocking_pool(task_runners_->blocking_pool());
 203   application_manager_->set_native_runner_factory(runner_factory.Pass());
 204
 205   ServiceProviderPtr service_provider_ptr;
 206   ServiceProviderPtr tracing_service_provider_ptr;
 207   new TracingServiceProvider(GetProxy(&tracing_service_provider_ptr));
 208
 209   scoped_ptr<shell::ConnectToApplicationParams> params(
 210       new shell::ConnectToApplicationParams);
 211   params->SetTargetURL(GURL("mojo:tracing"));
 212   params->set_services(GetProxy(&service_provider_ptr));
 213   params->set_exposed_services(tracing_service_provider_ptr.Pass());
 214   application_manager_->ConnectToApplication(params.Pass());
 215
 216   // Record the shell startup metrics used for performance testing.
 217   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 218           tracing::kEnableStatsCollectionBindings)) {
 219     tracing::StartupPerformanceDataCollectorPtr collector;
 220     service_provider_ptr->ConnectToService(
 221         tracing::StartupPerformanceDataCollector::Name_,
 222         GetProxy(&collector).PassMessagePipe());
 223 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(OS_LINUX)
 224     // CurrentProcessInfo::CreationTime is only defined on some platforms.
 225     const base::Time creation_time = base::CurrentProcessInfo::CreationTime();
 226     collector->SetShellProcessCreationTime(creation_time.ToInternalValue());
 227 #endif
 228     collector->SetShellMainEntryPointTime(main_entry_time_.ToInternalValue());
 229   }
 230
 231   InitDevToolsServiceIfNeeded(application_manager_.get(), command_line);
 232
 233   return true;
 234 }
 235
 236 void Context::Shutdown() {
 237   // Actions triggered by ApplicationManager's destructor may require a current
 238   // message loop, so we should destruct it explicitly now as ~Context() occurs
 239   // post message loop shutdown.
 240   application_manager_.reset();
 241
 242   TRACE_EVENT0("mojo_shell", "Context::Shutdown");
 243   DCHECK_EQ(base::MessageLoop::current()->task_runner(),
 244             task_runners_->shell_runner());
 245   embedder::ShutdownIPCSupport();
 246   // We'll quit when we get OnShutdownComplete().
 247   base::MessageLoop::current()->Run();
 248 }
 249
 250 void Context::OnShutdownComplete() {
 251   DCHECK_EQ(base::MessageLoop::current()->task_runner(),
 252             task_runners_->shell_runner());
 253   base::MessageLoop::current()->Quit();
 254 }
 255
 256 void Context::Run(const GURL& url) {
 257   DCHECK(app_complete_callback_.is_null());
 258   ServiceProviderPtr services;
 259   ServiceProviderPtr exposed_services;
 260
 261   app_urls_.insert(url);
 262
 263   scoped_ptr<shell::ConnectToApplicationParams> params(
 264       new shell::ConnectToApplicationParams);
 265   params->SetTargetURL(url);
 266   params->set_services(GetProxy(&services));
 267   params->set_exposed_services(exposed_services.Pass());
 268   params->set_on_application_end(
 269       base::Bind(&Context::OnApplicationEnd, base::Unretained(this), url));
 270   application_manager_->ConnectToApplication(params.Pass());
 271 }
 272
 273 void Context::RunCommandLineApplication(const base::Closure& callback) {
 274   DCHECK(app_urls_.empty());
 275   DCHECK(app_complete_callback_.is_null());
 276   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 277   base::CommandLine::StringVector args = command_line->GetArgs();
 278   for (size_t i = 0; i < args.size(); ++i) {
 279     GURL possible_app(args[i]);
 280     if (possible_app.SchemeIs("mojo")) {
 281       Run(possible_app);
 282       app_complete_callback_ = callback;
 283       break;
 284     }
 285   }
 286 }
 287
 288 void Context::OnApplicationEnd(const GURL& url) {
 289   if (app_urls_.find(url) != app_urls_.end()) {
 290     app_urls_.erase(url);
 291     if (app_urls_.empty() && base::MessageLoop::current()->is_running()) {
 292       DCHECK_EQ(base::MessageLoop::current()->task_runner(),
 293                 task_runners_->shell_runner());
 294       if (app_complete_callback_.is_null()) {
 295         base::MessageLoop::current()->Quit();
 296       } else {
 297         app_complete_callback_.Run();
 298       }
 299     }
 300   }
 301 }
 302
 303 }  // namespace runner
 304 }  // namespace mojo