Isolated FS for media devices.

webkit/fileapi/mtp_device_interface_win.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 "webkit/fileapi/mtp_device_interface_win.h"
+
+#include "base/logging.h"
+
+#define CLIENT_NAME         L"WPD Chromium"
+#define CLIENT_MAJOR_VER    1
+#define CLIENT_MINOR_VER    0
+#define CLIENT_REVISION     2
+
+namespace fileapi {
+
+MtpDeviceInterfaceWin::MtpDeviceInterfaceWin(
+    const FilePath::StringType& device_id)
+    : device_id_(device_id) {
+  CoInitialize(NULL);
+  bool res = Init();
+  DCHECK(res);
+}
+
+MtpDeviceInterfaceWin::~MtpDeviceInterfaceWin() {
+  pdevice_.Release();
+  CoUninitialize();

[kinuko, 2012/07/26 00:38:06]

Is it really ok to call these on another thread from the one we called
CoInitialize and Init()?

[kmadhusu, 2012/07/27 02:13:41]

That should be okay. I removed the win specific code from this CL. Lets focus on
the linux stuff first.

+}
+
+bool MtpDeviceInterfaceWin::Init() {
+  HRESULT hr = pdevice_.CreateInstance(__uuidof(PortableDevice),
+                                       NULL,
+                                       CLSCTX_INPROC_SERVER);
+  if (FAILED(hr))
+    return false;
+
+  base::win::ScopedComPtr<IPortableDeviceValues> client_info;
+  // Fill out information about your application, so the device knows
+  // who they are speaking to. Client information is optional.  The client
+  // can choose to identify itself, or to remain unknown to the driver. It is
+  // beneficial to identify yourself because drivers may be able to optimize
+  // their behavior for known clients.
+
+  // CoCreate an IPortableDeviceValues interface to hold the client
+  // information.
+  hr = client_info.CreateInstance(__uuidof(PortableDeviceValues),
+                                  NULL,
+                                  CLSCTX_INPROC_SERVER);
+  if (FAILED(hr))
+    return false;
+
+  // Attempt to set all bits of client information
+  hr = client_info->SetStringValue(WPD_CLIENT_NAME, CLIENT_NAME);
+  if (FAILED(hr))
+    LOG(INFO) << "Failed to set WPD_CLIENT_NAME ";
+
+  hr = client_info->SetUnsignedIntegerValue(WPD_CLIENT_MAJOR_VERSION,
+                                            CLIENT_MAJOR_VER);
+  if (FAILED(hr))
+    LOG(INFO) << "Failed to set WPD_CLIENT_MAJOR_VERSION";
+
+  hr = client_info->SetUnsignedIntegerValue(WPD_CLIENT_REVISION,
+                                            CLIENT_REVISION);
+  if (FAILED(hr))
+    LOG(INFO) << "Failed to set WPD_CLIENT_REVISION";
+
+  //  Some device drivers need to impersonate the caller in order to function
+  // correctly.  Since our application does not need to restrict its identity,
+  // specify SECURITY_IMPERSONATION so that we work with all devices.
+  hr = client_info->SetUnsignedIntegerValue(
+           WPD_CLIENT_SECURITY_QUALITY_OF_SERVICE, SECURITY_IMPERSONATION);
+  if (FAILED(hr))
+    LOG(INFO) << "Failed to set WPD_CLIENT_SECURITY_QUALITY_OF_SERVICE";
+
+  hr = pdevice_->Open(const_cast<wchar_t*>(device_id_.c_str()), client_info);
+  if (FAILED(hr)) {
+    if (hr == E_ACCESSDENIED) {
+      // Failed to Open the device for Read Write access, will open it for
+      // Read-only access instead.
+      client_info->SetUnsignedIntegerValue(WPD_CLIENT_DESIRED_ACCESS,
+                                           GENERIC_READ);
+      hr = pdevice_->Open(const_cast<wchar_t*>(device_id_.c_str()),
+                                               client_info);
+      if (FAILED(hr))
+        return false;
+    } else {
+      return false;
+    }
+  }
+  return true;
+}
+
+PlatformFileError MtpDeviceInterfaceWin::GetFileInfo(
+    const FilePath& file_path,
+    PlatformFileInfo* file_info) {
+  NOTIMPLEMENTED();
+  return base::PLATFORM_FILE_ERROR_SECURITY;
+}
+
+FileSystemFileUtil::AbstractFileEnumerator*
+    MtpDeviceInterfaceWin::CreateFileEnumerator(
+        const FilePath& root,
+        bool recursive) {
+  NOTIMPLEMENTED();
+  return new FileSystemFileUtil::EmptyFileEnumerator();
+}
+
+PlatformFileError MtpDeviceInterfaceWin::Touch(
+    const FilePath& file_path,
+    const base::Time& last_access_time,
+    const base::Time& last_modified_time) {
+  NOTIMPLEMENTED();
+  return base::PLATFORM_FILE_ERROR_SECURITY;
+}
+
+bool MtpDeviceInterfaceWin::PathExists(const FilePath& file_path) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool MtpDeviceInterfaceWin::DirectoryExists(const FilePath& file_path) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool MtpDeviceInterfaceWin::IsDirectoryEmpty(const FilePath& file_path) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+}  // namespace fileapi