зеркало из https://github.com/mozilla/gecko-dev.git
145 строки
4.4 KiB
C++
145 строки
4.4 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/ipc/IPCBlobInputStream.h"
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#include "mozilla/dom/ipc/IPCBlobInputStreamStorage.h"
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#include "nsComponentManagerUtils.h"
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#include "nsDebug.h"
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#include "nsID.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 "nsStringStream.h"
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#include "nsTemporaryFileInputStream.h"
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#include "nsXULAppAPI.h"
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#include "SlicedInputStream.h"
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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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void
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InputStreamHelper::SerializeInputStream(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors)
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{
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MOZ_ASSERT(aInputStream);
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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);
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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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already_AddRefed<nsIInputStream>
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InputStreamHelper::DeserializeInputStream(const InputStreamParams& aParams,
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const nsTArray<FileDescriptor>& aFileDescriptors)
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{
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nsCOMPtr<nsIInputStream> stream;
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nsCOMPtr<nsIIPCSerializableInputStream> serializable;
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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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IPCBlobInputStreamStorage::Get()->GetStream(aParams.get_IPCBlobInputStreamParams().id(),
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getter_AddRefs(stream));
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return stream.forget();
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}
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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::TTemporaryFileInputStreamParams:
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serializable = new nsTemporaryFileInputStream();
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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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// When the input stream already exists in this process, all we need to do
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// is retrieve the original instead of sending any data over the wire.
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case InputStreamParams::TRemoteInputStreamParams:
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// Thi is broken!
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return nullptr;
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case InputStreamParams::TSameProcessInputStreamParams: {
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MOZ_ASSERT(aFileDescriptors.IsEmpty());
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const SameProcessInputStreamParams& params =
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aParams.get_SameProcessInputStreamParams();
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stream = dont_AddRef(
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reinterpret_cast<nsIInputStream*>(params.addRefedInputStream()));
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MOZ_ASSERT(stream);
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return stream.forget();
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}
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case InputStreamParams::TSlicedInputStreamParams:
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serializable = new SlicedInputStream();
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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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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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