mirror of
https://github.com/mozilla/gecko-dev.git
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f8100451db
We will use the new type for the generated IPDL message handler prototype to make sure correct error handling method is called. MozReview-Commit-ID: AzVbApxFGZ0
744 lines
19 KiB
C++
744 lines
19 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ActorsChild.h"
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#include "BackgroundChildImpl.h"
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#include "FileHandleBase.h"
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#include "FileRequestBase.h"
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#include "js/Date.h"
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#include "mozilla/dom/EncodingUtils.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/ipc/BlobChild.h"
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#include "MutableFileBase.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsString.h"
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#include "xpcpublic.h"
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#include "mozilla/dom/BindingUtils.h"
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namespace mozilla {
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namespace dom {
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/*******************************************************************************
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* Helpers
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******************************************************************************/
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namespace {
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class MOZ_STACK_CLASS AutoSetCurrentFileHandle final
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{
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typedef mozilla::ipc::BackgroundChildImpl BackgroundChildImpl;
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FileHandleBase* const mFileHandle;
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FileHandleBase* mPreviousFileHandle;
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FileHandleBase** mThreadLocalSlot;
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public:
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explicit AutoSetCurrentFileHandle(FileHandleBase* aFileHandle)
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: mFileHandle(aFileHandle)
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, mPreviousFileHandle(nullptr)
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, mThreadLocalSlot(nullptr)
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{
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if (aFileHandle) {
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BackgroundChildImpl::ThreadLocal* threadLocal =
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BackgroundChildImpl::GetThreadLocalForCurrentThread();
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MOZ_ASSERT(threadLocal);
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// Hang onto this location for resetting later.
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mThreadLocalSlot = &threadLocal->mCurrentFileHandle;
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// Save the current value.
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mPreviousFileHandle = *mThreadLocalSlot;
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// Set the new value.
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*mThreadLocalSlot = aFileHandle;
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}
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}
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~AutoSetCurrentFileHandle()
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{
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MOZ_ASSERT_IF(mThreadLocalSlot, mFileHandle);
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MOZ_ASSERT_IF(mThreadLocalSlot, *mThreadLocalSlot == mFileHandle);
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if (mThreadLocalSlot) {
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// Reset old value.
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*mThreadLocalSlot = mPreviousFileHandle;
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}
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}
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FileHandleBase*
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FileHandle() const
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{
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return mFileHandle;
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}
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};
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class MOZ_STACK_CLASS ResultHelper final
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: public FileRequestBase::ResultCallback
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{
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FileRequestBase* mFileRequest;
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AutoSetCurrentFileHandle mAutoFileHandle;
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union
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{
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File* mFile;
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const nsCString* mString;
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const FileRequestMetadata* mMetadata;
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const JS::Handle<JS::Value>* mJSValHandle;
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} mResult;
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enum
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{
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ResultTypeFile,
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ResultTypeString,
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ResultTypeMetadata,
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ResultTypeJSValHandle,
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} mResultType;
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public:
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ResultHelper(FileRequestBase* aFileRequest,
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FileHandleBase* aFileHandle,
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File* aResult)
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: mFileRequest(aFileRequest)
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, mAutoFileHandle(aFileHandle)
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, mResultType(ResultTypeFile)
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{
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MOZ_ASSERT(aFileRequest);
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MOZ_ASSERT(aFileHandle);
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MOZ_ASSERT(aResult);
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mResult.mFile = aResult;
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}
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ResultHelper(FileRequestBase* aFileRequest,
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FileHandleBase* aFileHandle,
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const nsCString* aResult)
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: mFileRequest(aFileRequest)
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, mAutoFileHandle(aFileHandle)
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, mResultType(ResultTypeString)
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{
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MOZ_ASSERT(aFileRequest);
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MOZ_ASSERT(aFileHandle);
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MOZ_ASSERT(aResult);
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mResult.mString = aResult;
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}
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ResultHelper(FileRequestBase* aFileRequest,
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FileHandleBase* aFileHandle,
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const FileRequestMetadata* aResult)
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: mFileRequest(aFileRequest)
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, mAutoFileHandle(aFileHandle)
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, mResultType(ResultTypeMetadata)
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{
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MOZ_ASSERT(aFileRequest);
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MOZ_ASSERT(aFileHandle);
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MOZ_ASSERT(aResult);
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mResult.mMetadata = aResult;
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}
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ResultHelper(FileRequestBase* aFileRequest,
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FileHandleBase* aFileHandle,
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const JS::Handle<JS::Value>* aResult)
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: mFileRequest(aFileRequest)
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, mAutoFileHandle(aFileHandle)
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, mResultType(ResultTypeJSValHandle)
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{
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MOZ_ASSERT(aFileRequest);
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MOZ_ASSERT(aFileHandle);
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MOZ_ASSERT(aResult);
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mResult.mJSValHandle = aResult;
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}
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FileRequestBase*
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FileRequest() const
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{
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return mFileRequest;
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}
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FileHandleBase*
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FileHandle() const
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{
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return mAutoFileHandle.FileHandle();
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}
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virtual nsresult
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GetResult(JSContext* aCx, JS::MutableHandle<JS::Value> aResult) override
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{
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MOZ_ASSERT(aCx);
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MOZ_ASSERT(mFileRequest);
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switch (mResultType) {
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case ResultTypeFile:
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return GetResult(aCx, mResult.mFile, aResult);
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case ResultTypeString:
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return GetResult(aCx, mResult.mString, aResult);
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case ResultTypeMetadata:
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return GetResult(aCx, mResult.mMetadata, aResult);
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case ResultTypeJSValHandle:
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aResult.set(*mResult.mJSValHandle);
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return NS_OK;
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default:
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MOZ_CRASH("Unknown result type!");
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}
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MOZ_CRASH("Should never get here!");
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}
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private:
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nsresult
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GetResult(JSContext* aCx,
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File* aFile,
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JS::MutableHandle<JS::Value> aResult)
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{
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bool ok = GetOrCreateDOMReflector(aCx, aFile, aResult);
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if (NS_WARN_IF(!ok)) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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return NS_OK;
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}
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nsresult
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GetResult(JSContext* aCx,
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const nsCString* aString,
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JS::MutableHandle<JS::Value> aResult)
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{
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const nsCString& data = *aString;
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nsresult rv;
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if (!mFileRequest->HasEncoding()) {
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JS::Rooted<JSObject*> arrayBuffer(aCx);
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rv = nsContentUtils::CreateArrayBuffer(aCx, data, arrayBuffer.address());
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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aResult.setObject(*arrayBuffer);
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return NS_OK;
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}
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nsAutoCString encoding;
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// The BOM sniffing is baked into the "decode" part of the Encoding
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// Standard, which the File API references.
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if (!nsContentUtils::CheckForBOM(
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reinterpret_cast<const unsigned char *>(data.get()),
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data.Length(),
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encoding)) {
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// BOM sniffing failed. Try the API argument.
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if (!EncodingUtils::FindEncodingForLabel(mFileRequest->GetEncoding(),
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encoding)) {
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// API argument failed. Since we are dealing with a file system file,
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// we don't have a meaningful type attribute for the blob available,
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// so proceeding to the next step, which is defaulting to UTF-8.
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encoding.AssignLiteral("UTF-8");
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}
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}
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nsString tmpString;
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rv = nsContentUtils::ConvertStringFromEncoding(encoding, data, tmpString);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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if (NS_WARN_IF(!xpc::StringToJsval(aCx, tmpString, aResult))) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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return NS_OK;
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}
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nsresult
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GetResult(JSContext* aCx,
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const FileRequestMetadata* aMetadata,
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JS::MutableHandle<JS::Value> aResult)
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{
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JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
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if (NS_WARN_IF(!obj)) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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const FileRequestSize& size = aMetadata->size();
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if (size.type() != FileRequestSize::Tvoid_t) {
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MOZ_ASSERT(size.type() == FileRequestSize::Tuint64_t);
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JS::Rooted<JS::Value> number(aCx, JS_NumberValue(size.get_uint64_t()));
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if (NS_WARN_IF(!JS_DefineProperty(aCx, obj, "size", number, 0))) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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}
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const FileRequestLastModified& lastModified = aMetadata->lastModified();
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if (lastModified.type() != FileRequestLastModified::Tvoid_t) {
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MOZ_ASSERT(lastModified.type() == FileRequestLastModified::Tint64_t);
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JS::Rooted<JSObject*> date(aCx,
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JS::NewDateObject(aCx, JS::TimeClip(lastModified.get_int64_t())));
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if (NS_WARN_IF(!date)) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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if (NS_WARN_IF(!JS_DefineProperty(aCx, obj, "lastModified", date, 0))) {
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return NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
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}
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}
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aResult.setObject(*obj);
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return NS_OK;
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}
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};
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already_AddRefed<File>
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ConvertActorToFile(FileHandleBase* aFileHandle,
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const FileRequestGetFileResponse& aResponse)
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{
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auto* actor = static_cast<BlobChild*>(aResponse.fileChild());
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MutableFileBase* mutableFile = aFileHandle->MutableFile();
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MOZ_ASSERT(mutableFile);
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const FileRequestMetadata& metadata = aResponse.metadata();
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const FileRequestSize& size = metadata.size();
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MOZ_ASSERT(size.type() == FileRequestSize::Tuint64_t);
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const FileRequestLastModified& lastModified = metadata.lastModified();
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MOZ_ASSERT(lastModified.type() == FileRequestLastModified::Tint64_t);
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actor->SetMysteryBlobInfo(mutableFile->Name(),
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mutableFile->Type(),
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size.get_uint64_t(),
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lastModified.get_int64_t());
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RefPtr<BlobImpl> blobImpl = actor->GetBlobImpl();
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MOZ_ASSERT(blobImpl);
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RefPtr<File> file = mutableFile->CreateFileFor(blobImpl, aFileHandle);
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return file.forget();
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}
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void
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HandleSuccess(ResultHelper* aResultHelper)
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{
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MOZ_ASSERT(aResultHelper);
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RefPtr<FileRequestBase> fileRequest = aResultHelper->FileRequest();
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MOZ_ASSERT(fileRequest);
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fileRequest->AssertIsOnOwningThread();
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RefPtr<FileHandleBase> fileHandle = aResultHelper->FileHandle();
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MOZ_ASSERT(fileHandle);
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if (fileHandle->IsAborted()) {
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fileRequest->SetError(NS_ERROR_DOM_FILEHANDLE_ABORT_ERR);
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return;
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}
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MOZ_ASSERT(fileHandle->IsOpen());
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fileRequest->SetResultCallback(aResultHelper);
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MOZ_ASSERT(fileHandle->IsOpen() || fileHandle->IsAborted());
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}
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void
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HandleError(FileRequestBase* aFileRequest,
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nsresult aErrorCode,
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FileHandleBase* aFileHandle)
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{
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MOZ_ASSERT(aFileRequest);
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aFileRequest->AssertIsOnOwningThread();
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MOZ_ASSERT(NS_FAILED(aErrorCode));
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MOZ_ASSERT(NS_ERROR_GET_MODULE(aErrorCode) == NS_ERROR_MODULE_DOM_FILEHANDLE);
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MOZ_ASSERT(aFileHandle);
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RefPtr<FileRequestBase> fileRequest = aFileRequest;
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RefPtr<FileHandleBase> fileHandle = aFileHandle;
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AutoSetCurrentFileHandle ascfh(aFileHandle);
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fileRequest->SetError(aErrorCode);
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MOZ_ASSERT(fileHandle->IsOpen() || fileHandle->IsAborted());
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}
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} // anonymous namespace
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/*******************************************************************************
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* BackgroundMutableFileChildBase
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******************************************************************************/
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BackgroundMutableFileChildBase::BackgroundMutableFileChildBase(
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DEBUGONLY(PRThread* aOwningThread))
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: ThreadObject(DEBUGONLY(aOwningThread))
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, mMutableFile(nullptr)
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{
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AssertIsOnOwningThread();
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MOZ_COUNT_CTOR(BackgroundMutableFileChildBase);
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}
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BackgroundMutableFileChildBase::~BackgroundMutableFileChildBase()
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{
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AssertIsOnOwningThread();
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MOZ_COUNT_DTOR(BackgroundMutableFileChildBase);
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}
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void
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BackgroundMutableFileChildBase::EnsureDOMObject()
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{
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AssertIsOnOwningThread();
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if (mTemporaryStrongMutableFile) {
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return;
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}
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mTemporaryStrongMutableFile = CreateMutableFile();
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MOZ_ASSERT(mTemporaryStrongMutableFile);
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mTemporaryStrongMutableFile->AssertIsOnOwningThread();
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mMutableFile = mTemporaryStrongMutableFile;
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}
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void
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BackgroundMutableFileChildBase::ReleaseDOMObject()
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT(mTemporaryStrongMutableFile);
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mTemporaryStrongMutableFile->AssertIsOnOwningThread();
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MOZ_ASSERT(mMutableFile == mTemporaryStrongMutableFile);
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mTemporaryStrongMutableFile = nullptr;
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}
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void
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BackgroundMutableFileChildBase::SendDeleteMeInternal()
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT(!mTemporaryStrongMutableFile);
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if (mMutableFile) {
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mMutableFile->ClearBackgroundActor();
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mMutableFile = nullptr;
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MOZ_ALWAYS_TRUE(PBackgroundMutableFileChild::SendDeleteMe());
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}
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}
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void
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BackgroundMutableFileChildBase::ActorDestroy(ActorDestroyReason aWhy)
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{
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AssertIsOnOwningThread();
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if (mMutableFile) {
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mMutableFile->ClearBackgroundActor();
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DEBUGONLY(mMutableFile = nullptr;)
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}
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}
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PBackgroundFileHandleChild*
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BackgroundMutableFileChildBase::AllocPBackgroundFileHandleChild(
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const FileMode& aMode)
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{
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MOZ_CRASH("PBackgroundFileHandleChild actors should be manually "
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"constructed!");
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}
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bool
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BackgroundMutableFileChildBase::DeallocPBackgroundFileHandleChild(
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PBackgroundFileHandleChild* aActor)
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT(aActor);
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delete static_cast<BackgroundFileHandleChild*>(aActor);
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return true;
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}
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/*******************************************************************************
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* BackgroundFileHandleChild
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******************************************************************************/
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BackgroundFileHandleChild::BackgroundFileHandleChild(
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DEBUGONLY(PRThread* aOwningThread,)
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FileHandleBase* aFileHandle)
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: ThreadObject(DEBUGONLY(aOwningThread))
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, mTemporaryStrongFileHandle(aFileHandle)
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, mFileHandle(aFileHandle)
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT(aFileHandle);
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aFileHandle->AssertIsOnOwningThread();
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MOZ_COUNT_CTOR(BackgroundFileHandleChild);
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}
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BackgroundFileHandleChild::~BackgroundFileHandleChild()
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{
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AssertIsOnOwningThread();
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MOZ_COUNT_DTOR(BackgroundFileHandleChild);
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}
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void
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BackgroundFileHandleChild::SendDeleteMeInternal()
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{
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AssertIsOnOwningThread();
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if (mFileHandle) {
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NoteActorDestroyed();
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MOZ_ALWAYS_TRUE(PBackgroundFileHandleChild::SendDeleteMe());
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}
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}
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void
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BackgroundFileHandleChild::NoteActorDestroyed()
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT_IF(mTemporaryStrongFileHandle, mFileHandle);
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if (mFileHandle) {
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mFileHandle->ClearBackgroundActor();
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// Normally this would be DEBUG-only but NoteActorDestroyed is also called
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// from SendDeleteMeInternal. In that case we're going to receive an actual
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// ActorDestroy call later and we don't want to touch a dead object.
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mTemporaryStrongFileHandle = nullptr;
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mFileHandle = nullptr;
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}
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}
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void
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BackgroundFileHandleChild::NoteComplete()
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT_IF(mFileHandle, mTemporaryStrongFileHandle);
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mTemporaryStrongFileHandle = nullptr;
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}
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void
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BackgroundFileHandleChild::ActorDestroy(ActorDestroyReason aWhy)
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{
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AssertIsOnOwningThread();
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NoteActorDestroyed();
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}
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mozilla::ipc::IPCResult
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BackgroundFileHandleChild::RecvComplete(const bool& aAborted)
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{
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AssertIsOnOwningThread();
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MOZ_ASSERT(mFileHandle);
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mFileHandle->HandleCompleteOrAbort(aAborted);
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NoteComplete();
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return IPC_OK();
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}
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PBackgroundFileRequestChild*
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BackgroundFileHandleChild::AllocPBackgroundFileRequestChild(
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const FileRequestParams& aParams)
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{
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MOZ_CRASH("PBackgroundFileRequestChild actors should be manually "
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"constructed!");
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}
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bool
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BackgroundFileHandleChild::DeallocPBackgroundFileRequestChild(
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PBackgroundFileRequestChild* aActor)
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{
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MOZ_ASSERT(aActor);
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delete static_cast<BackgroundFileRequestChild*>(aActor);
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return true;
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}
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/*******************************************************************************
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* BackgroundFileRequestChild
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******************************************************************************/
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BackgroundFileRequestChild::BackgroundFileRequestChild(
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DEBUGONLY(PRThread* aOwningThread,)
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|
FileRequestBase* aFileRequest)
|
|
: ThreadObject(DEBUGONLY(aOwningThread))
|
|
, mFileRequest(aFileRequest)
|
|
, mFileHandle(aFileRequest->FileHandle())
|
|
, mActorDestroyed(false)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(aFileRequest);
|
|
aFileRequest->AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mFileHandle);
|
|
mFileHandle->AssertIsOnOwningThread();
|
|
|
|
MOZ_COUNT_CTOR(BackgroundFileRequestChild);
|
|
}
|
|
|
|
BackgroundFileRequestChild::~BackgroundFileRequestChild()
|
|
{
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(!mFileHandle);
|
|
|
|
MOZ_COUNT_DTOR(BackgroundFileRequestChild);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::HandleResponse(nsresult aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(NS_FAILED(aResponse));
|
|
MOZ_ASSERT(NS_ERROR_GET_MODULE(aResponse) == NS_ERROR_MODULE_DOM_FILEHANDLE);
|
|
MOZ_ASSERT(mFileHandle);
|
|
|
|
HandleError(mFileRequest, aResponse, mFileHandle);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::HandleResponse(
|
|
const FileRequestGetFileResponse& aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
|
|
RefPtr<File> file = ConvertActorToFile(mFileHandle, aResponse);
|
|
|
|
ResultHelper helper(mFileRequest, mFileHandle, file);
|
|
|
|
HandleSuccess(&helper);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::HandleResponse(const nsCString& aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
|
|
ResultHelper helper(mFileRequest, mFileHandle, &aResponse);
|
|
|
|
HandleSuccess(&helper);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::HandleResponse(const FileRequestMetadata& aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
|
|
ResultHelper helper(mFileRequest, mFileHandle, &aResponse);
|
|
|
|
HandleSuccess(&helper);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::HandleResponse(JS::Handle<JS::Value> aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
|
|
ResultHelper helper(mFileRequest, mFileHandle, &aResponse);
|
|
|
|
HandleSuccess(&helper);
|
|
}
|
|
|
|
void
|
|
BackgroundFileRequestChild::ActorDestroy(ActorDestroyReason aWhy)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
|
|
MOZ_ASSERT(!mActorDestroyed);
|
|
|
|
mActorDestroyed = true;
|
|
|
|
if (mFileHandle) {
|
|
mFileHandle->AssertIsOnOwningThread();
|
|
|
|
mFileHandle->OnRequestFinished(/* aActorDestroyedNormally */
|
|
aWhy == Deletion);
|
|
|
|
DEBUGONLY(mFileHandle = nullptr;)
|
|
}
|
|
}
|
|
|
|
mozilla::ipc::IPCResult
|
|
BackgroundFileRequestChild::Recv__delete__(const FileRequestResponse& aResponse)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mFileRequest);
|
|
MOZ_ASSERT(mFileHandle);
|
|
|
|
if (mFileHandle->IsAborted()) {
|
|
// Always handle an "error" with ABORT_ERR if the file handle was aborted,
|
|
// even if the request succeeded or failed with another error.
|
|
HandleResponse(NS_ERROR_DOM_FILEHANDLE_ABORT_ERR);
|
|
} else {
|
|
switch (aResponse.type()) {
|
|
case FileRequestResponse::Tnsresult:
|
|
HandleResponse(aResponse.get_nsresult());
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestGetFileResponse:
|
|
HandleResponse(aResponse.get_FileRequestGetFileResponse());
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestReadResponse:
|
|
HandleResponse(aResponse.get_FileRequestReadResponse().data());
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestWriteResponse:
|
|
HandleResponse(JS::UndefinedHandleValue);
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestTruncateResponse:
|
|
HandleResponse(JS::UndefinedHandleValue);
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestFlushResponse:
|
|
HandleResponse(JS::UndefinedHandleValue);
|
|
break;
|
|
|
|
case FileRequestResponse::TFileRequestGetMetadataResponse:
|
|
HandleResponse(aResponse.get_FileRequestGetMetadataResponse()
|
|
.metadata());
|
|
break;
|
|
|
|
default:
|
|
MOZ_CRASH("Unknown response type!");
|
|
}
|
|
}
|
|
|
|
mFileHandle->OnRequestFinished(/* aActorDestroyedNormally */ true);
|
|
|
|
// Null this out so that we don't try to call OnRequestFinished() again in
|
|
// ActorDestroy.
|
|
mFileHandle = nullptr;
|
|
|
|
return IPC_OK();
|
|
}
|
|
|
|
mozilla::ipc::IPCResult
|
|
BackgroundFileRequestChild::RecvProgress(const uint64_t& aProgress,
|
|
const uint64_t& aProgressMax)
|
|
{
|
|
AssertIsOnOwningThread();
|
|
MOZ_ASSERT(mFileRequest);
|
|
|
|
mFileRequest->OnProgress(aProgress, aProgressMax);
|
|
|
|
return IPC_OK();
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|