The Windows portion of Native Messagaing

chrome/browser/extensions/api/messaging/native_message_process_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/messaging/native_message_process_host.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/pickle.h"
 #include "base/process_util.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/messaging/native_process_launcher.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/features/feature.h"
 #include "content/public/common/result_codes.h"
 
 namespace {
 
-const int kExitTimeoutMS = 5000;
-const uint32 kMaxMessageDataLength = 10 * 1024 * 1024;
 const char kNativeHostsDirectoryName[] = "Native Hosts";
 
 }  // namespace
 
 namespace extensions {
 
+// static
+const int NativeMessageProcessHost::kExitTimeoutMS = 5000;
+const uint32 NativeMessageProcessHost::kMaxMessageDataLength = 10 * 1024 * 1024;
+
 NativeMessageProcessHost::NativeMessageProcessHost(
     base::WeakPtr<Client> weak_client_ui,
     int destination_port,
     base::ProcessHandle native_process_handle,
     FileHandle read_file,
     FileHandle write_file,
     bool is_send_message)
     : weak_client_ui_(weak_client_ui),
       destination_port_(destination_port),
       native_process_handle_(native_process_handle),
       read_file_(read_file),
       write_file_(write_file),
       scoped_read_file_(&read_file_),
       scoped_write_file_(&write_file_),
       is_send_message_(is_send_message) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
   InitIO();
 }
 
 NativeMessageProcessHost::~NativeMessageProcessHost() {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+
+  StopIO();
+
   // Give the process some time to shutdown, then try and kill it.
-  content::BrowserThread::PostDelayedTask(
-      content::BrowserThread::FILE,
-      FROM_HERE,
-      base::Bind(base::IgnoreResult(&base::KillProcess),
-                 native_process_handle_,
-                 content::RESULT_CODE_NORMAL_EXIT,
-                 false /* don't wait for exit */),
-      base::TimeDelta::FromMilliseconds(kExitTimeoutMS));
+  if (native_process_handle_ != base::kNullProcessHandle &&
+      base::GetTerminationStatus(native_process_handle_, NULL) ==
+          base::TERMINATION_STATUS_STILL_RUNNING) {
+    content::BrowserThread::PostDelayedTask(
+        content::BrowserThread::IO,
+        FROM_HERE,
+        base::Bind(base::IgnoreResult(&base::KillProcess),
+                   native_process_handle_,
+                   content::RESULT_CODE_NORMAL_EXIT,
+                   true /* wait for exit */),
+        base::TimeDelta::FromMilliseconds(kExitTimeoutMS));
+  }
 }
 
 // static
 void NativeMessageProcessHost::Create(base::WeakPtr<Client> weak_client_ui,
                                       const std::string& native_app_name,
                                       const std::string& connection_message,
                                       int destination_port,
                                       MessageType type,
                                       CreateCallback callback) {
-  NativeProcessLauncher launcher;
   CreateWithLauncher(weak_client_ui, native_app_name, connection_message,
-                     destination_port, type, callback, launcher);
+                     destination_port, type, callback,
+                     scoped_ptr<NativeProcessLauncher>(
+                         new NativeProcessLauncher()));
 }
 
 // static
 void NativeMessageProcessHost::CreateWithLauncher(
     base::WeakPtr<Client> weak_client_ui,
     const std::string& native_app_name,
     const std::string& connection_message,
     int destination_port,
     MessageType type,
     CreateCallback callback,
-    const NativeProcessLauncher& launcher) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+    scoped_ptr<NativeProcessLauncher> launcher) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
   DCHECK(type == TYPE_SEND_MESSAGE_REQUEST || type == TYPE_CONNECT);
 
   ScopedHost process;
   if (Feature::GetCurrentChannel() > chrome::VersionInfo::CHANNEL_DEV ||
       !CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableNativeMessaging)) {
     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
                                      base::Bind(callback,
                                                 base::Passed(&process)));
     return;
   }
 
+  content::BrowserThread::PostTask(content::BrowserThread::FILE, FROM_HERE,
+      base::Bind(&NativeMessageProcessHost::LaunchProcessOnFileThread,
+                 weak_client_ui,
+                 native_app_name,
+                 connection_message,
+                 destination_port,
+                 type,
+                 callback,
+                 base::Passed(&launcher)));
+}
+
+// static
+void NativeMessageProcessHost::LaunchProcessOnFileThread(
+    base::WeakPtr<Client> weak_client_ui,
+    const std::string& native_app_name,
+    const std::string& connection_message,
+    int destination_port,
+    MessageType type,
+    CreateCallback callback,
+    scoped_ptr<NativeProcessLauncher> launcher) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  ScopedHost process;
   FilePath native_host_program;
   FilePath native_host_registry;
   CHECK(PathService::Get(chrome::DIR_USER_DATA, &native_host_registry));
   native_host_registry =
       native_host_registry.AppendASCII(kNativeHostsDirectoryName);
   native_host_program = native_host_registry.AppendASCII(native_app_name);
 
   // Make sure that the client is not trying to invoke something outside of the
   // proper directory. Eg. '../../dangerous_something.exe'.
   if (!file_util::ContainsPath(native_host_registry, native_host_program)) {
     LOG(ERROR) << "Could not find native host: " << native_app_name;
     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
                                      base::Bind(callback,
                                                 base::Passed(&process)));
     return;
   }
 
   FileHandle read_handle;
   FileHandle write_handle;
   base::ProcessHandle native_process_handle;
 
-  if (!launcher.LaunchNativeProcess(native_host_program,
-                                    &native_process_handle,
-                                    &read_handle,
-                                    &write_handle)) {
+  if (!launcher->LaunchNativeProcess(native_host_program,
+                                     &native_process_handle,
+                                     &read_handle,
+                                     &write_handle)) {
     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
                                      base::Bind(callback,
                                                 base::Passed(&process)));
     return;
   }
 
+  NativeProcessHostCreationInformation creation_info(weak_client_ui,
+                                                     connection_message,
+                                                     destination_port,
+                                                     type,
+                                                     callback,
+                                                     read_handle,
+                                                     write_handle,
+                                                     native_process_handle);
+
+  content::BrowserThread::PostTask(content::BrowserThread::IO, FROM_HERE,
+      base::Bind(&NativeMessageProcessHost::FinalizeCreate,
+                 creation_info));
+}
+
+// static
+void NativeMessageProcessHost::FinalizeCreate(
+    NativeProcessHostCreationInformation creation_info) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+  ScopedHost process;
+
   process.reset(new NativeMessageProcessHost(
-      weak_client_ui, destination_port, native_process_handle, read_handle,
-      write_handle, type == TYPE_SEND_MESSAGE_REQUEST));
+      creation_info.weak_client_ui, creation_info.destination_port,
+      creation_info.native_process_handle, creation_info.read_handle,
+      creation_info.write_handle,
+      creation_info.type == TYPE_SEND_MESSAGE_REQUEST));
 
-  process->SendImpl(type, connection_message);
+  process->SendImpl(creation_info.type, creation_info.connection_message);
 
   content::BrowserThread::PostTask(
       content::BrowserThread::UI, FROM_HERE,
-      base::Bind(callback, base::Passed(&process)));
+      base::Bind(creation_info.callback, base::Passed(&process)));
 }
 
 void NativeMessageProcessHost::SendImpl(MessageType type,
                                         const std::string& json) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
 
   // Make sure that the process has not died.
-  if (base::GetTerminationStatus(native_process_handle_, NULL) !=
-      base::TERMINATION_STATUS_STILL_RUNNING) {
+  if (native_process_handle_ != base::kNullProcessHandle &&
+      base::GetTerminationStatus(native_process_handle_, NULL) !=
+          base::TERMINATION_STATUS_STILL_RUNNING) {
     // Notify the message service that the channel should close.
     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
         base::Bind(&Client::CloseChannel, weak_client_ui_,
                    destination_port_, true));
   }
 
   WriteMessage(type, json);
 }
 
 bool NativeMessageProcessHost::WriteMessage(MessageType type,
@@ skipping 11 matching lines @@
 
   if (!WriteData(write_file_, const_cast<const Pickle*>(&pickle)->payload(),
                  pickle.payload_size())) {
     LOG(ERROR) << "Error writing message to the native client.";
     return false;
   }
 
   return true;
 }
 
-bool NativeMessageProcessHost::ReadMessage(MessageType* type,
-                                           std::string* message) {
-  // Read the type (uint32) and length (uint32).
-  char message_meta_data[8];
-  if (!ReadData(read_file_, message_meta_data, 8)) {
-    LOG(ERROR) << "Error reading the message type and length.";
-    return false;
-  }
-
+bool NativeMessageProcessHost::VerifyMessageMetaData(
+    const char* message_meta_data,
+    MessageType* type,
+    uint32* message_length) {
   Pickle pickle;
   pickle.WriteBytes(message_meta_data, 8);
   PickleIterator pickle_it(pickle);
   uint32 uint_type;
   uint32 data_length;
   if (!pickle_it.ReadUInt32(&uint_type) ||
       !pickle_it.ReadUInt32(&data_length)) {
     LOG(ERROR) << "Error getting the message type and length from the pickle.";
     return false;
   }
 
   if (uint_type >= NUM_MESSAGE_TYPES) {
     LOG(ERROR) << type << " is not a valid message type.";
     return false;
   }
 
   if ((is_send_message_ && (uint_type != TYPE_SEND_MESSAGE_RESPONSE)) ||
       (!is_send_message_ && (uint_type != TYPE_CONNECT_MESSAGE))) {
     LOG(ERROR) << "Recieved a message of type " << uint_type << ". "
                << "Expecting a message of type "
                << (is_send_message_ ? TYPE_SEND_MESSAGE_RESPONSE :
                                       TYPE_CONNECT_MESSAGE);
     return false;
   }
-  *type = static_cast<MessageType>(uint_type);
 
   if (data_length > kMaxMessageDataLength) {
     LOG(ERROR) << data_length << " is too large for the length of a message. "
                << "Max message size is " << kMaxMessageDataLength;
     return false;
   }
 
-  message->resize(data_length, '\0');
-  if (!ReadData(read_file_, &(*message)[0], data_length)) {
-    LOG(ERROR) << "Error reading the json data.";
-    return false;
-  }
+  *type = static_cast<MessageType>(uint_type);
+  *message_length = data_length;
 
   return true;
 }
 
 }  // namespace extensions