diff -r 000000000000 -r 6474c204b198 dom/filesystem/GetFileOrDirectoryTask.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/filesystem/GetFileOrDirectoryTask.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,223 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GetFileOrDirectoryTask.h"
+
+#include "js/Value.h"
+#include "mozilla/dom/Directory.h"
+#include "mozilla/dom/FileSystemBase.h"
+#include "mozilla/dom/FileSystemUtils.h"
+#include "mozilla/dom/Promise.h"
+#include "nsDOMFile.h"
+#include "nsIFile.h"
+#include "nsStringGlue.h"
+
+namespace mozilla {
+namespace dom {
+
+GetFileOrDirectoryTask::GetFileOrDirectoryTask(
+  FileSystemBase* aFileSystem,
+  const nsAString& aTargetPath,
+  bool aDirectoryOnly)
+  : FileSystemTaskBase(aFileSystem)
+  , mTargetRealPath(aTargetPath)
+  , mIsDirectory(aDirectoryOnly)
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  MOZ_ASSERT(aFileSystem);
+  nsCOMPtr<nsIGlobalObject> globalObject =
+    do_QueryInterface(aFileSystem->GetWindow());
+  if (!globalObject) {
+    return;
+  }
+  mPromise = new Promise(globalObject);
+}
+
+GetFileOrDirectoryTask::GetFileOrDirectoryTask(
+  FileSystemBase* aFileSystem,
+  const FileSystemGetFileOrDirectoryParams& aParam,
+  FileSystemRequestParent* aParent)
+  : FileSystemTaskBase(aFileSystem, aParam, aParent)
+  , mIsDirectory(false)
+{
+  MOZ_ASSERT(FileSystemUtils::IsParentProcess(),
+             "Only call from parent process!");
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  MOZ_ASSERT(aFileSystem);
+  mTargetRealPath = aParam.realPath();
+}
+
+GetFileOrDirectoryTask::~GetFileOrDirectoryTask()
+{
+  MOZ_ASSERT(!mPromise || NS_IsMainThread(),
+             "mPromise should be released on main thread!");
+}
+
+already_AddRefed<Promise>
+GetFileOrDirectoryTask::GetPromise()
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  return nsRefPtr<Promise>(mPromise).forget();
+}
+
+FileSystemParams
+GetFileOrDirectoryTask::GetRequestParams(const nsString& aFileSystem) const
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  return FileSystemGetFileOrDirectoryParams(aFileSystem, mTargetRealPath);
+}
+
+FileSystemResponseValue
+GetFileOrDirectoryTask::GetSuccessRequestResult() const
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  if (mIsDirectory) {
+    return FileSystemDirectoryResponse(mTargetRealPath);
+  }
+  BlobParent* actor = GetBlobParent(mTargetFile);
+  if (!actor) {
+    return FileSystemErrorResponse(NS_ERROR_DOM_FILESYSTEM_UNKNOWN_ERR);
+  }
+  FileSystemFileResponse response;
+  response.blobParent() = actor;
+  return response;
+}
+
+void
+GetFileOrDirectoryTask::SetSuccessRequestResult(const FileSystemResponseValue& aValue)
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  switch (aValue.type()) {
+    case FileSystemResponseValue::TFileSystemFileResponse: {
+      FileSystemFileResponse r = aValue;
+      BlobChild* actor = static_cast<BlobChild*>(r.blobChild());
+      nsCOMPtr<nsIDOMBlob> blob = actor->GetBlob();
+      mTargetFile = do_QueryInterface(blob);
+      mIsDirectory = false;
+      break;
+    }
+    case FileSystemResponseValue::TFileSystemDirectoryResponse: {
+      FileSystemDirectoryResponse r = aValue;
+      mTargetRealPath = r.realPath();
+      mIsDirectory = true;
+      break;
+    }
+    default: {
+      NS_RUNTIMEABORT("not reached");
+      break;
+    }
+  }
+}
+
+nsresult
+GetFileOrDirectoryTask::Work()
+{
+  MOZ_ASSERT(FileSystemUtils::IsParentProcess(),
+             "Only call from parent process!");
+  MOZ_ASSERT(!NS_IsMainThread(), "Only call on worker thread!");
+
+  if (mFileSystem->IsShutdown()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Whether we want to get the root directory.
+  bool getRoot = mTargetRealPath.IsEmpty();
+
+  nsCOMPtr<nsIFile> file = mFileSystem->GetLocalFile(mTargetRealPath);
+  if (!file) {
+    return NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
+  }
+
+  bool exists;
+  nsresult rv = file->Exists(&exists);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (!exists) {
+    if (!getRoot) {
+      return NS_ERROR_DOM_FILE_NOT_FOUND_ERR;
+    }
+
+    // If the root directory doesn't exit, create it.
+    rv = file->Create(nsIFile::DIRECTORY_TYPE, 0777);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+  }
+
+  // Get isDirectory.
+  rv = file->IsDirectory(&mIsDirectory);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (mIsDirectory) {
+    return NS_OK;
+  }
+
+  // Check if the root is a directory.
+  if (getRoot) {
+    return NS_ERROR_DOM_FILESYSTEM_TYPE_MISMATCH_ERR;
+  }
+
+  bool isFile;
+  // Get isFile
+  rv = file->IsFile(&isFile);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  if (!isFile) {
+    // Neither directory or file.
+    return NS_ERROR_DOM_FILESYSTEM_TYPE_MISMATCH_ERR;
+  }
+
+  if (!mFileSystem->IsSafeFile(file)) {
+    return NS_ERROR_DOM_SECURITY_ERR;
+  }
+
+  mTargetFile = new nsDOMFileFile(file);
+
+  return NS_OK;
+}
+
+void
+GetFileOrDirectoryTask::HandlerCallback()
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
+  if (mFileSystem->IsShutdown()) {
+    mPromise = nullptr;
+    return;
+  }
+
+  if (HasError()) {
+    nsRefPtr<DOMError> domError = new DOMError(mFileSystem->GetWindow(),
+      mErrorValue);
+    mPromise->MaybeReject(domError);
+    mPromise = nullptr;
+    return;
+  }
+
+  if (mIsDirectory) {
+    nsRefPtr<Directory> dir = new Directory(mFileSystem, mTargetRealPath);
+    mPromise->MaybeResolve(dir);
+    mPromise = nullptr;
+    return;
+  }
+
+  mPromise->MaybeResolve(mTargetFile);
+  mPromise = nullptr;
+}
+
+void
+GetFileOrDirectoryTask::GetPermissionAccessType(nsCString& aAccess) const
+{
+  aAccess.AssignLiteral("read");
+}
+
+} // namespace dom
+} // namespace mozilla