mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-01 00:32:11 +00:00
1739e25925
Differential Revision: https://phabricator.services.mozilla.com/D28191 --HG-- extra : moz-landing-system : lando
376 lines
13 KiB
C++
376 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InputStreamUtils.h"
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#include "nsIIPCSerializableInputStream.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/dom/File.h"
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#include "mozilla/dom/IPCBlobInputStream.h"
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#include "mozilla/dom/IPCBlobInputStreamStorage.h"
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#include "mozilla/ipc/IPCStreamDestination.h"
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#include "mozilla/ipc/IPCStreamSource.h"
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#include "mozilla/InputStreamLengthHelper.h"
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#include "mozilla/SlicedInputStream.h"
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#include "mozilla/InputStreamLengthWrapper.h"
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#include "nsComponentManagerUtils.h"
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#include "nsDebug.h"
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#include "nsIAsyncInputStream.h"
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#include "nsIAsyncOutputStream.h"
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#include "nsID.h"
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#include "nsIPipe.h"
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#include "nsIXULRuntime.h"
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#include "nsMIMEInputStream.h"
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#include "nsMultiplexInputStream.h"
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#include "nsNetCID.h"
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#include "nsStreamUtils.h"
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#include "nsStringStream.h"
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#include "nsXULAppAPI.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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namespace {
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NS_DEFINE_CID(kStringInputStreamCID, NS_STRINGINPUTSTREAM_CID);
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NS_DEFINE_CID(kFileInputStreamCID, NS_LOCALFILEINPUTSTREAM_CID);
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NS_DEFINE_CID(kBufferedInputStreamCID, NS_BUFFEREDINPUTSTREAM_CID);
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NS_DEFINE_CID(kMIMEInputStreamCID, NS_MIMEINPUTSTREAM_CID);
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NS_DEFINE_CID(kMultiplexInputStreamCID, NS_MULTIPLEXINPUTSTREAM_CID);
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} // namespace
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namespace mozilla {
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namespace ipc {
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namespace {
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template <typename M>
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void SerializeInputStreamInternal(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize,
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uint32_t* aSizeUsed, M* aManager) {
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MOZ_ASSERT(aInputStream);
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MOZ_ASSERT(aManager);
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nsCOMPtr<nsIIPCSerializableInputStream> serializable =
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do_QueryInterface(aInputStream);
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if (!serializable) {
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MOZ_CRASH("Input stream is not serializable!");
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}
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serializable->Serialize(aParams, aFileDescriptors, aDelayedStart, aMaxSize,
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aSizeUsed, aManager);
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if (aParams.type() == InputStreamParams::T__None) {
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MOZ_CRASH("Serialize failed!");
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}
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}
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template <typename M>
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void SerializeInputStreamAsPipeInternal(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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bool aDelayedStart, M* aManager) {
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MOZ_ASSERT(aInputStream);
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MOZ_ASSERT(aManager);
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// Let's try to take the length using InputStreamLengthHelper. If the length
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// cannot be taken synchronously, and its length is needed, the stream needs
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// to be fully copied in memory on the deserialization side.
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int64_t length;
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if (!InputStreamLengthHelper::GetSyncLength(aInputStream, &length)) {
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length = -1;
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}
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// As a fallback, attempt to stream the data across using a IPCStream
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// actor. For blocking streams, create a nonblocking pipe instead,
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nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(aInputStream);
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if (!asyncStream) {
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const uint32_t kBufferSize = 32768; // matches IPCStream buffer size.
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nsCOMPtr<nsIAsyncOutputStream> sink;
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nsresult rv = NS_NewPipe2(getter_AddRefs(asyncStream), getter_AddRefs(sink),
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true, false, kBufferSize, UINT32_MAX);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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nsCOMPtr<nsIEventTarget> target =
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do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
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rv = NS_AsyncCopy(aInputStream, sink, target, NS_ASYNCCOPY_VIA_READSEGMENTS,
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kBufferSize);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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}
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MOZ_ASSERT(asyncStream);
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aParams = IPCRemoteStreamParams(
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aDelayedStart, IPCStreamSource::Create(asyncStream, aManager), length);
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}
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} // namespace
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void InputStreamHelper::SerializeInputStream(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors, bool aDelayedStart,
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uint32_t aMaxSize, uint32_t* aSizeUsed, ContentChild* aManager) {
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SerializeInputStreamInternal(aInputStream, aParams, aFileDescriptors,
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aDelayedStart, aMaxSize, aSizeUsed, aManager);
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}
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void InputStreamHelper::SerializeInputStream(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors, bool aDelayedStart,
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uint32_t aMaxSize, uint32_t* aSizeUsed, PBackgroundChild* aManager) {
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SerializeInputStreamInternal(aInputStream, aParams, aFileDescriptors,
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aDelayedStart, aMaxSize, aSizeUsed, aManager);
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}
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void InputStreamHelper::SerializeInputStream(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors, bool aDelayedStart,
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uint32_t aMaxSize, uint32_t* aSizeUsed, ContentParent* aManager) {
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SerializeInputStreamInternal(aInputStream, aParams, aFileDescriptors,
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aDelayedStart, aMaxSize, aSizeUsed, aManager);
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}
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void InputStreamHelper::SerializeInputStream(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors, bool aDelayedStart,
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uint32_t aMaxSize, uint32_t* aSizeUsed, PBackgroundParent* aManager) {
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SerializeInputStreamInternal(aInputStream, aParams, aFileDescriptors,
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aDelayedStart, aMaxSize, aSizeUsed, aManager);
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}
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void InputStreamHelper::SerializeInputStreamAsPipe(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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bool aDelayedStart,
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ContentChild* aManager) {
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SerializeInputStreamAsPipeInternal(aInputStream, aParams, aDelayedStart,
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aManager);
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}
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void InputStreamHelper::SerializeInputStreamAsPipe(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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bool aDelayedStart,
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PBackgroundChild* aManager) {
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SerializeInputStreamAsPipeInternal(aInputStream, aParams, aDelayedStart,
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aManager);
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}
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void InputStreamHelper::SerializeInputStreamAsPipe(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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bool aDelayedStart,
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ContentParent* aManager) {
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SerializeInputStreamAsPipeInternal(aInputStream, aParams, aDelayedStart,
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aManager);
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}
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void InputStreamHelper::SerializeInputStreamAsPipe(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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bool aDelayedStart, PBackgroundParent* aManager) {
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SerializeInputStreamAsPipeInternal(aInputStream, aParams, aDelayedStart,
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aManager);
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}
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void InputStreamHelper::PostSerializationActivation(InputStreamParams& aParams,
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bool aConsumedByIPC,
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bool aDelayedStart) {
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switch (aParams.type()) {
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case InputStreamParams::TBufferedInputStreamParams: {
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BufferedInputStreamParams& params =
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aParams.get_BufferedInputStreamParams();
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InputStreamHelper::PostSerializationActivation(
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params.optionalStream(), aConsumedByIPC, aDelayedStart);
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return;
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}
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case InputStreamParams::TMIMEInputStreamParams: {
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MIMEInputStreamParams& params = aParams.get_MIMEInputStreamParams();
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InputStreamHelper::PostSerializationActivation(
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params.optionalStream(), aConsumedByIPC, aDelayedStart);
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return;
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}
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case InputStreamParams::TMultiplexInputStreamParams: {
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MultiplexInputStreamParams& params =
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aParams.get_MultiplexInputStreamParams();
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for (InputStreamParams& subParams : params.streams()) {
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InputStreamHelper::PostSerializationActivation(
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subParams, aConsumedByIPC, aDelayedStart);
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}
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return;
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}
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case InputStreamParams::TSlicedInputStreamParams: {
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SlicedInputStreamParams& params = aParams.get_SlicedInputStreamParams();
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InputStreamHelper::PostSerializationActivation(
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params.stream(), aConsumedByIPC, aDelayedStart);
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return;
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}
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case InputStreamParams::TInputStreamLengthWrapperParams: {
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InputStreamLengthWrapperParams& params =
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aParams.get_InputStreamLengthWrapperParams();
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InputStreamHelper::PostSerializationActivation(
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params.stream(), aConsumedByIPC, aDelayedStart);
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return;
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}
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case InputStreamParams::TIPCRemoteStreamParams: {
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IPCRemoteStreamType& remoteInputStream =
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aParams.get_IPCRemoteStreamParams().stream();
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IPCStreamSource* source = nullptr;
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if (remoteInputStream.type() ==
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IPCRemoteStreamType::TPChildToParentStreamChild) {
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source = IPCStreamSource::Cast(
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remoteInputStream.get_PChildToParentStreamChild());
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} else {
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MOZ_ASSERT(remoteInputStream.type() ==
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IPCRemoteStreamType::TPParentToChildStreamParent);
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source = IPCStreamSource::Cast(
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remoteInputStream.get_PParentToChildStreamParent());
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}
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MOZ_ASSERT(source);
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// If the source stream has not been taken to be sent to the other side,
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// we can destroy it.
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if (!aConsumedByIPC) {
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source->StartDestroy();
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return;
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}
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if (!aDelayedStart) {
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// If we don't need to do a delayedStart, we start it now. Otherwise,
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// the Start() will be called at the first use by the
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// IPCStreamDestination::DelayedStartInputStream.
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source->Start();
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}
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return;
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}
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case InputStreamParams::TStringInputStreamParams:
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break;
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case InputStreamParams::TFileInputStreamParams:
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break;
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case InputStreamParams::TIPCBlobInputStreamParams:
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break;
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default:
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MOZ_CRASH(
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"A new stream? Should decide if it must be processed recursively or "
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"not.");
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}
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}
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void InputStreamHelper::PostSerializationActivation(
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Maybe<InputStreamParams>& aParams, bool aConsumedByIPC,
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bool aDelayedStart) {
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if (aParams.isSome()) {
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InputStreamHelper::PostSerializationActivation(
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aParams.ref(), aConsumedByIPC, aDelayedStart);
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}
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}
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already_AddRefed<nsIInputStream> InputStreamHelper::DeserializeInputStream(
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const InputStreamParams& aParams,
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const nsTArray<FileDescriptor>& aFileDescriptors) {
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// IPCBlobInputStreams are not deserializable on the parent side.
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if (aParams.type() == InputStreamParams::TIPCBlobInputStreamParams) {
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MOZ_ASSERT(XRE_IsParentProcess());
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nsCOMPtr<nsIInputStream> stream;
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IPCBlobInputStreamStorage::Get()->GetStream(
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aParams.get_IPCBlobInputStreamParams().id(),
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aParams.get_IPCBlobInputStreamParams().start(),
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aParams.get_IPCBlobInputStreamParams().length(),
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getter_AddRefs(stream));
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return stream.forget();
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}
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if (aParams.type() == InputStreamParams::TIPCRemoteStreamParams) {
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const IPCRemoteStreamParams& remoteStream =
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aParams.get_IPCRemoteStreamParams();
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const IPCRemoteStreamType& remoteStreamType = remoteStream.stream();
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IPCStreamDestination* destinationStream;
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if (remoteStreamType.type() ==
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IPCRemoteStreamType::TPChildToParentStreamParent) {
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destinationStream = IPCStreamDestination::Cast(
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remoteStreamType.get_PChildToParentStreamParent());
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} else {
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MOZ_ASSERT(remoteStreamType.type() ==
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IPCRemoteStreamType::TPParentToChildStreamChild);
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destinationStream = IPCStreamDestination::Cast(
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remoteStreamType.get_PParentToChildStreamChild());
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}
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destinationStream->SetDelayedStart(remoteStream.delayedStart());
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destinationStream->SetLength(remoteStream.length());
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return destinationStream->TakeReader();
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}
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nsCOMPtr<nsIIPCSerializableInputStream> serializable;
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switch (aParams.type()) {
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case InputStreamParams::TStringInputStreamParams:
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serializable = do_CreateInstance(kStringInputStreamCID);
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break;
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case InputStreamParams::TFileInputStreamParams:
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serializable = do_CreateInstance(kFileInputStreamCID);
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break;
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case InputStreamParams::TBufferedInputStreamParams:
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serializable = do_CreateInstance(kBufferedInputStreamCID);
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break;
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case InputStreamParams::TMIMEInputStreamParams:
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serializable = do_CreateInstance(kMIMEInputStreamCID);
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break;
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case InputStreamParams::TMultiplexInputStreamParams:
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serializable = do_CreateInstance(kMultiplexInputStreamCID);
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break;
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case InputStreamParams::TSlicedInputStreamParams:
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serializable = new SlicedInputStream();
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break;
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case InputStreamParams::TInputStreamLengthWrapperParams:
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serializable = new InputStreamLengthWrapper();
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break;
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default:
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MOZ_ASSERT(false, "Unknown params!");
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return nullptr;
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}
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MOZ_ASSERT(serializable);
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if (!serializable->Deserialize(aParams, aFileDescriptors)) {
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MOZ_ASSERT(false, "Deserialize failed!");
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return nullptr;
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}
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nsCOMPtr<nsIInputStream> stream = do_QueryInterface(serializable);
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MOZ_ASSERT(stream);
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return stream.forget();
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}
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} // namespace ipc
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} // namespace mozilla
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