diff options
Diffstat (limited to 'dom/fs/api/FileSystemHandle.cpp')
| -rw-r--r-- | dom/fs/api/FileSystemHandle.cpp | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/dom/fs/api/FileSystemHandle.cpp b/dom/fs/api/FileSystemHandle.cpp new file mode 100644 index 0000000000..beca83d0bf --- /dev/null +++ b/dom/fs/api/FileSystemHandle.cpp @@ -0,0 +1,319 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=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 "FileSystemHandle.h" + +#include "FileSystemDirectoryHandle.h" +#include "FileSystemFileHandle.h" +#include "fs/FileSystemRequestHandler.h" +#include "js/StructuredClone.h" +#include "mozilla/ErrorResult.h" +#include "mozilla/dom/FileSystemHandleBinding.h" +#include "mozilla/dom/FileSystemLog.h" +#include "mozilla/dom/FileSystemManager.h" +#include "mozilla/dom/Promise-inl.h" +#include "mozilla/dom/Promise.h" +#include "mozilla/dom/StorageManager.h" +#include "mozilla/dom/StructuredCloneHolder.h" +#include "mozilla/dom/quota/QuotaCommon.h" +#include "mozilla/ipc/PBackgroundSharedTypes.h" +#include "nsJSPrincipals.h" +#include "nsString.h" +#include "prio.h" +#include "private/pprio.h" +#include "xpcpublic.h" + +namespace mozilla::dom { + +namespace { + +bool ConstructHandleMetadata(JSContext* aCx, nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader, + const bool aDirectory, + fs::FileSystemEntryMetadata& aMetadata) { + using namespace mozilla::dom::fs; + + EntryId entryId; + if (!entryId.SetLength(32u, fallible)) { + return false; + } + + if (!JS_ReadBytes(aReader, static_cast<void*>(entryId.BeginWriting()), 32u)) { + return false; + } + + Name name; + if (!StructuredCloneHolder::ReadString(aReader, name)) { + return false; + } + + mozilla::ipc::PrincipalInfo storageKey; + if (!nsJSPrincipals::ReadPrincipalInfo(aReader, storageKey)) { + return false; + } + + QM_TRY_UNWRAP(auto hasEqualStorageKey, + aGlobal->HasEqualStorageKey(storageKey), false); + + if (!hasEqualStorageKey) { + LOG(("Blocking deserialization of %s due to cross-origin", + NS_ConvertUTF16toUTF8(name).get())); + return false; + } + + LOG_VERBOSE(("Deserializing %s", NS_ConvertUTF16toUTF8(name).get())); + + aMetadata = fs::FileSystemEntryMetadata(entryId, name, aDirectory); + return true; +} + +} // namespace + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileSystemHandle) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY + NS_INTERFACE_MAP_ENTRY(nsISupports) +NS_INTERFACE_MAP_END + +NS_IMPL_CYCLE_COLLECTING_ADDREF(FileSystemHandle) +NS_IMPL_CYCLE_COLLECTING_RELEASE(FileSystemHandle) + +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(FileSystemHandle) +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FileSystemHandle) + NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal) + // Don't unlink mManager! + NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER +NS_IMPL_CYCLE_COLLECTION_UNLINK_END +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(FileSystemHandle) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mManager) +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +FileSystemHandle::FileSystemHandle( + nsIGlobalObject* aGlobal, RefPtr<FileSystemManager>& aManager, + const fs::FileSystemEntryMetadata& aMetadata, + fs::FileSystemRequestHandler* aRequestHandler) + : mGlobal(aGlobal), + mManager(aManager), + mMetadata(aMetadata), + mRequestHandler(aRequestHandler) { + MOZ_ASSERT(!mMetadata.entryId().IsEmpty()); +} + +// WebIDL Boilerplate + +nsIGlobalObject* FileSystemHandle::GetParentObject() const { return mGlobal; } + +JSObject* FileSystemHandle::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return FileSystemHandle_Binding::Wrap(aCx, this, aGivenProto); +} + +// WebIDL Interface + +void FileSystemHandle::GetName(nsAString& aResult) { + aResult = mMetadata.entryName(); +} + +already_AddRefed<Promise> FileSystemHandle::IsSameEntry( + FileSystemHandle& aOther, ErrorResult& aError) const { + RefPtr<Promise> promise = Promise::Create(GetParentObject(), aError); + if (aError.Failed()) { + return nullptr; + } + + // Handles the case of "dir = createdir foo; removeEntry(foo); file = + // createfile foo; issameentry(dir, file)" + const bool result = mMetadata.entryId().Equals(aOther.mMetadata.entryId()) && + Kind() == aOther.Kind(); + promise->MaybeResolve(result); + + return promise.forget(); +} + +already_AddRefed<Promise> FileSystemHandle::Move(const nsAString& aName, + ErrorResult& aError) { + LOG(("Move %s to %s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(aName).get())); + + fs::EntryId parent; // empty means same directory + return Move(parent, aName, aError); +} + +already_AddRefed<Promise> FileSystemHandle::Move( + FileSystemDirectoryHandle& aParent, ErrorResult& aError) { + LOG(("Move %s to %s/%s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(aParent.mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(mMetadata.entryName()).get())); + return Move(aParent, mMetadata.entryName(), aError); +} + +already_AddRefed<Promise> FileSystemHandle::Move( + FileSystemDirectoryHandle& aParent, const nsAString& aName, + ErrorResult& aError) { + LOG(("Move %s to %s/%s", NS_ConvertUTF16toUTF8(mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(aParent.mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(aName).get())); + return Move(aParent.mMetadata.entryId(), aName, aError); +} + +already_AddRefed<Promise> FileSystemHandle::Move(const fs::EntryId& aParentId, + const nsAString& aName, + ErrorResult& aError) { + RefPtr<Promise> promise = Promise::Create(GetParentObject(), aError); + if (aError.Failed()) { + return nullptr; + } + + fs::Name name(aName); + if (!aParentId.IsEmpty()) { + fs::FileSystemChildMetadata newMetadata; + newMetadata.parentId() = aParentId; + newMetadata.childName() = aName; + mRequestHandler->MoveEntry(mManager, this, mMetadata, newMetadata, promise, + aError); + } else { + mRequestHandler->RenameEntry(mManager, this, mMetadata, name, promise, + aError); + } + if (aError.Failed()) { + return nullptr; + } + + // Other handles to this will be broken, and the spec is ok with this, but we + // need to update our EntryId and name + promise->AddCallbacksWithCycleCollectedArgs( + [name](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv, + FileSystemHandle* aHandle) { + // XXX Fix entryId! + LOG(("Changing FileSystemHandle name from %s to %s", + NS_ConvertUTF16toUTF8(aHandle->mMetadata.entryName()).get(), + NS_ConvertUTF16toUTF8(name).get())); + aHandle->mMetadata.entryName() = name; + }, + [](JSContext* aCx, JS::Handle<JS::Value> aValue, ErrorResult& aRv, + FileSystemHandle* aHandle) { + LOG(("reject of move for %s", + NS_ConvertUTF16toUTF8(aHandle->mMetadata.entryName()).get())); + }, + RefPtr(this)); + + return promise.forget(); +} + +// [Serializable] implementation + +// static +already_AddRefed<FileSystemHandle> FileSystemHandle::ReadStructuredClone( + JSContext* aCx, nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader) { + LOG_VERBOSE(("Reading File/DirectoryHandle")); + + uint32_t kind = static_cast<uint32_t>(FileSystemHandleKind::EndGuard_); + + if (!JS_ReadBytes(aReader, reinterpret_cast<void*>(&kind), + sizeof(uint32_t))) { + return nullptr; + } + + if (kind == static_cast<uint32_t>(FileSystemHandleKind::Directory)) { + RefPtr<FileSystemHandle> result = + FileSystemHandle::ConstructDirectoryHandle(aCx, aGlobal, aReader); + return result.forget(); + } + + if (kind == static_cast<uint32_t>(FileSystemHandleKind::File)) { + RefPtr<FileSystemHandle> result = + FileSystemHandle::ConstructFileHandle(aCx, aGlobal, aReader); + return result.forget(); + } + + return nullptr; +} + +bool FileSystemHandle::WriteStructuredClone( + JSContext* aCx, JSStructuredCloneWriter* aWriter) const { + LOG_VERBOSE(("Writing File/DirectoryHandle")); + MOZ_ASSERT(mMetadata.entryId().Length() == 32); + + auto kind = static_cast<uint32_t>(Kind()); + if (NS_WARN_IF(!JS_WriteBytes(aWriter, static_cast<void*>(&kind), + sizeof(uint32_t)))) { + return false; + } + + if (NS_WARN_IF(!JS_WriteBytes( + aWriter, static_cast<const void*>(mMetadata.entryId().get()), + mMetadata.entryId().Length()))) { + return false; + } + + if (!StructuredCloneHolder::WriteString(aWriter, mMetadata.entryName())) { + return false; + } + + // Needed to make sure the destination nsIGlobalObject is from the same + // origin/principal + QM_TRY_INSPECT(const auto& storageKey, mGlobal->GetStorageKey(), false); + + return nsJSPrincipals::WritePrincipalInfo(aWriter, storageKey); +} + +// static +already_AddRefed<FileSystemFileHandle> FileSystemHandle::ConstructFileHandle( + JSContext* aCx, nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader) { + LOG(("Reading FileHandle")); + + fs::FileSystemEntryMetadata metadata; + if (!ConstructHandleMetadata(aCx, aGlobal, aReader, /* aDirectory */ false, + metadata)) { + return nullptr; + } + + RefPtr<StorageManager> storageManager = aGlobal->GetStorageManager(); + if (!storageManager) { + return nullptr; + } + + // Note that the actor may not exist or may not be connected yet. + RefPtr<FileSystemManager> fileSystemManager = + storageManager->GetFileSystemManager(); + + RefPtr<FileSystemFileHandle> fsHandle = + new FileSystemFileHandle(aGlobal, fileSystemManager, metadata); + + return fsHandle.forget(); +} + +// static +already_AddRefed<FileSystemDirectoryHandle> +FileSystemHandle::ConstructDirectoryHandle(JSContext* aCx, + nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader) { + LOG(("Reading DirectoryHandle")); + + fs::FileSystemEntryMetadata metadata; + if (!ConstructHandleMetadata(aCx, aGlobal, aReader, /* aDirectory */ true, + metadata)) { + return nullptr; + } + + RefPtr<StorageManager> storageManager = aGlobal->GetStorageManager(); + if (!storageManager) { + return nullptr; + } + + // Note that the actor may not exist or may not be connected yet. + RefPtr<FileSystemManager> fileSystemManager = + storageManager->GetFileSystemManager(); + + RefPtr<FileSystemDirectoryHandle> fsHandle = + new FileSystemDirectoryHandle(aGlobal, fileSystemManager, metadata); + + return fsHandle.forget(); +} + +} // namespace mozilla::dom |