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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "InputStreamUtils.h"
#include "nsIIPCSerializableInputStream.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/ipc/BlobChild.h"
#include "mozilla/dom/ipc/BlobParent.h"
#include "nsComponentManagerUtils.h"
#include "nsDebug.h"
#include "nsID.h"
#include "nsIXULRuntime.h"
#include "nsMIMEInputStream.h"
#include "nsMultiplexInputStream.h"
#include "nsNetCID.h"
#include "nsStringStream.h"
#include "nsXULAppAPI.h"
using namespace mozilla::dom;
namespace {
NS_DEFINE_CID(kStringInputStreamCID, NS_STRINGINPUTSTREAM_CID);
NS_DEFINE_CID(kFileInputStreamCID, NS_LOCALFILEINPUTSTREAM_CID);
NS_DEFINE_CID(kPartialFileInputStreamCID, NS_PARTIALLOCALFILEINPUTSTREAM_CID);
NS_DEFINE_CID(kBufferedInputStreamCID, NS_BUFFEREDINPUTSTREAM_CID);
NS_DEFINE_CID(kMIMEInputStreamCID, NS_MIMEINPUTSTREAM_CID);
NS_DEFINE_CID(kMultiplexInputStreamCID, NS_MULTIPLEXINPUTSTREAM_CID);
} // namespace
namespace mozilla {
namespace ipc {
void
SerializeInputStream(nsIInputStream* aInputStream,
InputStreamParams& aParams,
nsTArray<FileDescriptor>& aFileDescriptors)
{
MOZ_ASSERT(aInputStream);
nsCOMPtr<nsIIPCSerializableInputStream> serializable =
do_QueryInterface(aInputStream);
if (!serializable) {
MOZ_CRASH("Input stream is not serializable!");
}
serializable->Serialize(aParams, aFileDescriptors);
if (aParams.type() == InputStreamParams::T__None) {
MOZ_CRASH("Serialize failed!");
}
}
void
SerializeInputStream(nsIInputStream* aInputStream,
OptionalInputStreamParams& aParams,
nsTArray<FileDescriptor>& aFileDescriptors)
{
if (aInputStream) {
InputStreamParams params;
SerializeInputStream(aInputStream, params, aFileDescriptors);
aParams = params;
}
else {
aParams = mozilla::void_t();
}
}
already_AddRefed<nsIInputStream>
DeserializeInputStream(const InputStreamParams& aParams,
const nsTArray<FileDescriptor>& aFileDescriptors)
{
nsCOMPtr<nsIInputStream> stream;
nsCOMPtr<nsIIPCSerializableInputStream> serializable;
switch (aParams.type()) {
case InputStreamParams::TStringInputStreamParams:
serializable = do_CreateInstance(kStringInputStreamCID);
break;
case InputStreamParams::TFileInputStreamParams:
serializable = do_CreateInstance(kFileInputStreamCID);
break;
case InputStreamParams::TPartialFileInputStreamParams:
serializable = do_CreateInstance(kPartialFileInputStreamCID);
break;
case InputStreamParams::TTemporaryFileInputStreamParams:
serializable = new nsTemporaryFileInputStream();
break;
case InputStreamParams::TBufferedInputStreamParams:
serializable = do_CreateInstance(kBufferedInputStreamCID);
break;
case InputStreamParams::TMIMEInputStreamParams:
serializable = do_CreateInstance(kMIMEInputStreamCID);
break;
case InputStreamParams::TMultiplexInputStreamParams:
serializable = do_CreateInstance(kMultiplexInputStreamCID);
break;
// When the input stream already exists in this process, all we need to do
// is retrieve the original instead of sending any data over the wire.
case InputStreamParams::TRemoteInputStreamParams: {
if (NS_WARN_IF(!XRE_IsParentProcess())) {
return nullptr;
}
const nsID& id = aParams.get_RemoteInputStreamParams().id();
RefPtr<BlobImpl> blobImpl = BlobParent::GetBlobImplForID(id);
MOZ_ASSERT(blobImpl, "Invalid blob contents");
// If fetching the internal stream fails, we ignore it and return a
// null stream.
ErrorResult rv;
nsCOMPtr<nsIInputStream> stream;
blobImpl->GetInternalStream(getter_AddRefs(stream), rv);
if (NS_WARN_IF(rv.Failed()) || !stream) {
NS_WARNING("Couldn't obtain a valid stream from the blob");
rv.SuppressException();
}
return stream.forget();
}
case InputStreamParams::TSameProcessInputStreamParams: {
MOZ_ASSERT(aFileDescriptors.IsEmpty());
const SameProcessInputStreamParams& params =
aParams.get_SameProcessInputStreamParams();
stream = dont_AddRef(
reinterpret_cast<nsIInputStream*>(params.addRefedInputStream()));
MOZ_ASSERT(stream);
return stream.forget();
}
default:
MOZ_ASSERT(false, "Unknown params!");
return nullptr;
}
MOZ_ASSERT(serializable);
if (!serializable->Deserialize(aParams, aFileDescriptors)) {
MOZ_ASSERT(false, "Deserialize failed!");
return nullptr;
}
stream = do_QueryInterface(serializable);
MOZ_ASSERT(stream);
return stream.forget();
}
already_AddRefed<nsIInputStream>
DeserializeInputStream(const OptionalInputStreamParams& aParams,
const nsTArray<FileDescriptor>& aFileDescriptors)
{
nsCOMPtr<nsIInputStream> stream;
switch (aParams.type()) {
case OptionalInputStreamParams::Tvoid_t:
// Leave stream null.
break;
case OptionalInputStreamParams::TInputStreamParams:
stream = DeserializeInputStream(aParams.get_InputStreamParams(),
aFileDescriptors);
break;
default:
MOZ_ASSERT(false, "Unknown params!");
}
return stream.forget();
}
} // namespace ipc
} // namespace mozilla
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