Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#include "InputStreamUtils.h"
#include "nsIIPCSerializableInputStream.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/quota/DecryptingInputStream_impl.h"
#include "mozilla/dom/quota/IPCStreamCipherStrategy.h"
#include "mozilla/ipc/DataPipe.h"
#include "mozilla/InputStreamLengthHelper.h"
#include "mozilla/RemoteLazyInputStream.h"
#include "mozilla/RemoteLazyInputStreamChild.h"
#include "mozilla/RemoteLazyInputStreamStorage.h"
#include "mozilla/SlicedInputStream.h"
#include "mozilla/InputStreamLengthWrapper.h"
#include "nsBufferedStreams.h"
#include "nsComponentManagerUtils.h"
#include "nsDebug.h"
#include "nsFileStreams.h"
#include "nsIAsyncInputStream.h"
#include "nsIAsyncOutputStream.h"
#include "nsID.h"
#include "nsIMIMEInputStream.h"
#include "nsIMultiplexInputStream.h"
#include "nsIPipe.h"
#include "nsMIMEInputStream.h"
#include "nsMultiplexInputStream.h"
#include "nsNetCID.h"
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsXULAppAPI.h"
using namespace mozilla;
using namespace mozilla::dom;
namespace mozilla {
namespace ipc {
void InputStreamHelper::SerializedComplexity(nsIInputStream* aInputStream,
uint32_t aMaxSize,
uint32_t* aSizeUsed,
uint32_t* aPipes,
uint32_t* aTransferables) {
MOZ_ASSERT(aInputStream);
nsCOMPtr<nsIIPCSerializableInputStream> serializable =
do_QueryInterface(aInputStream);
if (!serializable) {
MOZ_CRASH("Input stream is not serializable!");
}
serializable->SerializedComplexity(aMaxSize, aSizeUsed, aPipes,
aTransferables);
}
void InputStreamHelper::SerializeInputStream(nsIInputStream* aInputStream,
InputStreamParams& aParams,
uint32_t aMaxSize,
uint32_t* aSizeUsed) {
MOZ_ASSERT(aInputStream);
nsCOMPtr<nsIIPCSerializableInputStream> serializable =
do_QueryInterface(aInputStream);
if (!serializable) {
MOZ_CRASH("Input stream is not serializable!");
}
serializable->Serialize(aParams, aMaxSize, aSizeUsed);
if (aParams.type() == InputStreamParams::T__None) {
MOZ_CRASH("Serialize failed!");
}
}
void InputStreamHelper::SerializeInputStreamAsPipe(nsIInputStream* aInputStream,
InputStreamParams& aParams) {
MOZ_ASSERT(aInputStream);
// Let's try to take the length using InputStreamLengthHelper. If the length
// cannot be taken synchronously, and its length is needed, the stream needs
// to be fully copied in memory on the deserialization side.
int64_t length;
if (!InputStreamLengthHelper::GetSyncLength(aInputStream, &length)) {
length = -1;
}
RefPtr<DataPipeSender> sender;
RefPtr<DataPipeReceiver> receiver;
nsresult rv = NewDataPipe(kDefaultDataPipeCapacity, getter_AddRefs(sender),
getter_AddRefs(receiver));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
nsCOMPtr<nsIEventTarget> target =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
rv =
NS_AsyncCopy(aInputStream, sender, target, NS_ASYNCCOPY_VIA_WRITESEGMENTS,
kDefaultDataPipeCapacity, nullptr, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
aParams = DataPipeReceiverStreamParams(WrapNotNull(receiver));
if (length != -1) {
aParams = InputStreamLengthWrapperParams(aParams, length, false);
}
}
already_AddRefed<nsIInputStream> InputStreamHelper::DeserializeInputStream(
const InputStreamParams& aParams) {
if (aParams.type() == InputStreamParams::TRemoteLazyInputStreamParams) {
const RemoteLazyInputStreamParams& params =
aParams.get_RemoteLazyInputStreamParams();
// If the RemoteLazyInputStream already has an internal stream, unwrap it.
// This is required as some code unfortunately depends on the precise
// topology of received streams, and cannot handle being passed a
// `RemoteLazyInputStream` in the parent process.
nsCOMPtr<nsIInputStream> innerStream;
if (XRE_IsParentProcess() &&
NS_SUCCEEDED(
params.stream()->TakeInternalStream(getter_AddRefs(innerStream)))) {
return innerStream.forget();
}
return do_AddRef(params.stream().get());
}
if (aParams.type() == InputStreamParams::TDataPipeReceiverStreamParams) {
const DataPipeReceiverStreamParams& pipeParams =
aParams.get_DataPipeReceiverStreamParams();
return do_AddRef(pipeParams.pipe().get());
}
nsCOMPtr<nsIIPCSerializableInputStream> serializable;
switch (aParams.type()) {
case InputStreamParams::TStringInputStreamParams: {
nsCOMPtr<nsIInputStream> stream;
NS_NewCStringInputStream(getter_AddRefs(stream), ""_ns);
serializable = do_QueryInterface(stream);
} break;
case InputStreamParams::TFileInputStreamParams: {
nsCOMPtr<nsIFileInputStream> stream;
nsFileInputStream::Create(NS_GET_IID(nsIFileInputStream),
getter_AddRefs(stream));
serializable = do_QueryInterface(stream);
} break;
case InputStreamParams::TBufferedInputStreamParams: {
nsCOMPtr<nsIBufferedInputStream> stream;
nsBufferedInputStream::Create(NS_GET_IID(nsIBufferedInputStream),
getter_AddRefs(stream));
serializable = do_QueryInterface(stream);
} break;
case InputStreamParams::TMIMEInputStreamParams: {
nsCOMPtr<nsIMIMEInputStream> stream;
nsMIMEInputStreamConstructor(NS_GET_IID(nsIMIMEInputStream),
getter_AddRefs(stream));
serializable = do_QueryInterface(stream);
} break;
case InputStreamParams::TMultiplexInputStreamParams: {
nsCOMPtr<nsIMultiplexInputStream> stream;
nsMultiplexInputStreamConstructor(NS_GET_IID(nsIMultiplexInputStream),
getter_AddRefs(stream));
serializable = do_QueryInterface(stream);
} break;
case InputStreamParams::TSlicedInputStreamParams:
serializable = new SlicedInputStream();
break;
case InputStreamParams::TInputStreamLengthWrapperParams:
serializable = new InputStreamLengthWrapper();
break;
case InputStreamParams::TEncryptedFileInputStreamParams:
serializable = new dom::quota::DecryptingInputStream<
dom::quota::IPCStreamCipherStrategy>();
break;
default:
MOZ_ASSERT(false, "Unknown params!");
return nullptr;
}
MOZ_ASSERT(serializable);
if (!serializable->Deserialize(aParams)) {
MOZ_ASSERT(false, "Deserialize failed!");
return nullptr;
}
nsCOMPtr<nsIInputStream> stream = do_QueryInterface(serializable);
MOZ_ASSERT(stream);
return stream.forget();
}
} // namespace ipc
} // namespace mozilla