зеркало из https://github.com/mozilla/gecko-dev.git
545 строки
17 KiB
C++
545 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/**
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* The MIME stream separates headers and a datastream. It also allows
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* automatic creation of the content-length header.
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*/
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#include "nsMIMEInputStream.h"
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#include <utility>
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/SeekableStreamWrapper.h"
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#include "mozilla/ipc/InputStreamUtils.h"
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#include "nsCOMPtr.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIAsyncInputStream.h"
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#include "nsIClassInfoImpl.h"
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#include "nsIHttpHeaderVisitor.h"
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#include "nsIIPCSerializableInputStream.h"
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#include "nsIInputStreamLength.h"
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#include "nsIMIMEInputStream.h"
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#include "nsISeekableStream.h"
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#include "nsString.h"
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using namespace mozilla::ipc;
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using mozilla::Maybe;
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class nsMIMEInputStream : public nsIMIMEInputStream,
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public nsISeekableStream,
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public nsIIPCSerializableInputStream,
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public nsIAsyncInputStream,
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public nsIInputStreamCallback,
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public nsIInputStreamLength,
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public nsIAsyncInputStreamLength,
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public nsIInputStreamLengthCallback,
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public nsICloneableInputStream {
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virtual ~nsMIMEInputStream() = default;
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public:
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nsMIMEInputStream() = default;
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIINPUTSTREAM
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NS_DECL_NSIMIMEINPUTSTREAM
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NS_DECL_NSISEEKABLESTREAM
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NS_DECL_NSITELLABLESTREAM
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NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
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NS_DECL_NSIASYNCINPUTSTREAM
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NS_DECL_NSIINPUTSTREAMCALLBACK
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NS_DECL_NSIINPUTSTREAMLENGTH
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NS_DECL_NSIASYNCINPUTSTREAMLENGTH
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NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK
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NS_DECL_NSICLONEABLEINPUTSTREAM
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private:
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void InitStreams();
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template <typename M>
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void SerializeInternal(InputStreamParams& aParams,
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FileDescriptorArray& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize,
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uint32_t* aSizeUsed, M* aManager);
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struct MOZ_STACK_CLASS ReadSegmentsState {
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nsCOMPtr<nsIInputStream> mThisStream;
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nsWriteSegmentFun mWriter{nullptr};
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void* mClosure{nullptr};
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};
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static nsresult ReadSegCb(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment, uint32_t aToOffset,
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uint32_t aCount, uint32_t* aWriteCount);
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bool IsSeekableInputStream() const;
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bool IsAsyncInputStream() const;
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bool IsInputStreamLength() const;
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bool IsAsyncInputStreamLength() const;
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bool IsCloneableInputStream() const;
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nsTArray<HeaderEntry> mHeaders;
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nsCOMPtr<nsIInputStream> mStream;
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bool mStartedReading{false};
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mozilla::Mutex mMutex{"nsMIMEInputStream::mMutex"};
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// This is protected by mutex.
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nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback;
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// This is protected by mutex.
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nsCOMPtr<nsIInputStreamLengthCallback> mAsyncInputStreamLengthCallback;
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};
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NS_IMPL_ADDREF(nsMIMEInputStream)
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NS_IMPL_RELEASE(nsMIMEInputStream)
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NS_IMPL_CLASSINFO(nsMIMEInputStream, nullptr, nsIClassInfo::THREADSAFE,
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NS_MIMEINPUTSTREAM_CID)
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NS_INTERFACE_MAP_BEGIN(nsMIMEInputStream)
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NS_INTERFACE_MAP_ENTRY(nsIMIMEInputStream)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIInputStream, nsIMIMEInputStream)
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NS_INTERFACE_MAP_ENTRY(nsITellableStream)
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsISeekableStream, IsSeekableInputStream())
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NS_INTERFACE_MAP_ENTRY(nsIIPCSerializableInputStream)
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStream, IsAsyncInputStream())
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamCallback,
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IsAsyncInputStream())
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMIMEInputStream)
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamLength,
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IsInputStreamLength())
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStreamLength,
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IsAsyncInputStreamLength())
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamLengthCallback,
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IsAsyncInputStreamLength())
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NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsICloneableInputStream,
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IsCloneableInputStream())
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NS_IMPL_QUERY_CLASSINFO(nsMIMEInputStream)
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NS_INTERFACE_MAP_END
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NS_IMPL_CI_INTERFACE_GETTER(nsMIMEInputStream, nsIMIMEInputStream,
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nsIAsyncInputStream, nsIInputStream,
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nsISeekableStream, nsITellableStream)
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NS_IMETHODIMP
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nsMIMEInputStream::AddHeader(const char* aName, const char* aValue) {
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NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
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HeaderEntry* entry = mHeaders.AppendElement();
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entry->name().Append(aName);
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entry->value().Append(aValue);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMIMEInputStream::VisitHeaders(nsIHttpHeaderVisitor* visitor) {
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nsresult rv;
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for (auto& header : mHeaders) {
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rv = visitor->VisitHeader(header.name(), header.value());
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if (NS_FAILED(rv)) {
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return rv;
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMIMEInputStream::SetData(nsIInputStream* aStream) {
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NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
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nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(aStream);
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if (!seekable) {
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return NS_ERROR_INVALID_ARG;
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}
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mStream = aStream;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMIMEInputStream::GetData(nsIInputStream** aStream) {
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NS_ENSURE_ARG_POINTER(aStream);
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*aStream = do_AddRef(mStream).take();
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return NS_OK;
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}
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// set up the internal streams
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void nsMIMEInputStream::InitStreams() {
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NS_ASSERTION(!mStartedReading,
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"Don't call initStreams twice without rewinding");
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mStartedReading = true;
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}
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#define INITSTREAMS \
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if (!mStartedReading) { \
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NS_ENSURE_TRUE(mStream, NS_ERROR_UNEXPECTED); \
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InitStreams(); \
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}
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// Reset mStartedReading when Seek-ing to start
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NS_IMETHODIMP
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nsMIMEInputStream::Seek(int32_t whence, int64_t offset) {
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NS_ENSURE_TRUE(mStream, NS_ERROR_UNEXPECTED);
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nsresult rv;
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nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
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if (whence == NS_SEEK_SET && offset == 0) {
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rv = stream->Seek(whence, offset);
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if (NS_SUCCEEDED(rv)) mStartedReading = false;
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} else {
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INITSTREAMS;
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rv = stream->Seek(whence, offset);
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}
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return rv;
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}
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// Proxy ReadSegments since we need to be a good little nsIInputStream
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NS_IMETHODIMP nsMIMEInputStream::ReadSegments(nsWriteSegmentFun aWriter,
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void* aClosure, uint32_t aCount,
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uint32_t* _retval) {
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INITSTREAMS;
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ReadSegmentsState state;
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// Disambiguate ambiguous nsIInputStream.
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state.mThisStream =
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static_cast<nsIInputStream*>(static_cast<nsIMIMEInputStream*>(this));
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state.mWriter = aWriter;
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state.mClosure = aClosure;
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return mStream->ReadSegments(ReadSegCb, &state, aCount, _retval);
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}
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nsresult nsMIMEInputStream::ReadSegCb(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment,
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uint32_t aToOffset, uint32_t aCount,
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uint32_t* aWriteCount) {
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ReadSegmentsState* state = (ReadSegmentsState*)aClosure;
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return (state->mWriter)(state->mThisStream, state->mClosure, aFromRawSegment,
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aToOffset, aCount, aWriteCount);
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}
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/**
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* Forward everything else to the mStream after calling InitStreams()
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*/
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// nsIInputStream
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NS_IMETHODIMP nsMIMEInputStream::Close(void) {
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INITSTREAMS;
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return mStream->Close();
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}
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NS_IMETHODIMP nsMIMEInputStream::Available(uint64_t* _retval) {
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INITSTREAMS;
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return mStream->Available(_retval);
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}
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NS_IMETHODIMP nsMIMEInputStream::Read(char* buf, uint32_t count,
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uint32_t* _retval) {
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INITSTREAMS;
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return mStream->Read(buf, count, _retval);
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}
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NS_IMETHODIMP nsMIMEInputStream::IsNonBlocking(bool* aNonBlocking) {
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INITSTREAMS;
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return mStream->IsNonBlocking(aNonBlocking);
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}
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// nsIAsyncInputStream
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NS_IMETHODIMP
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nsMIMEInputStream::CloseWithStatus(nsresult aStatus) {
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INITSTREAMS;
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nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream);
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return asyncStream->CloseWithStatus(aStatus);
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}
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NS_IMETHODIMP
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nsMIMEInputStream::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
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uint32_t aRequestedCount,
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nsIEventTarget* aEventTarget) {
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INITSTREAMS;
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nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream);
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if (NS_WARN_IF(!asyncStream)) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIInputStreamCallback> callback = aCallback ? this : nullptr;
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{
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MutexAutoLock lock(mMutex);
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if (mAsyncWaitCallback && aCallback) {
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return NS_ERROR_FAILURE;
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}
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mAsyncWaitCallback = aCallback;
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}
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return asyncStream->AsyncWait(callback, aFlags, aRequestedCount,
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aEventTarget);
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}
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// nsIInputStreamCallback
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NS_IMETHODIMP
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nsMIMEInputStream::OnInputStreamReady(nsIAsyncInputStream* aStream) {
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nsCOMPtr<nsIInputStreamCallback> callback;
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{
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MutexAutoLock lock(mMutex);
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// We have been canceled in the meanwhile.
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if (!mAsyncWaitCallback) {
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return NS_OK;
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}
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callback.swap(mAsyncWaitCallback);
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}
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MOZ_ASSERT(callback);
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return callback->OnInputStreamReady(this);
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}
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// nsITellableStream
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NS_IMETHODIMP nsMIMEInputStream::Tell(int64_t* _retval) {
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INITSTREAMS;
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nsCOMPtr<nsITellableStream> stream = do_QueryInterface(mStream);
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return stream->Tell(_retval);
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}
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// nsISeekableStream
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NS_IMETHODIMP nsMIMEInputStream::SetEOF(void) {
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INITSTREAMS;
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nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
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return stream->SetEOF();
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}
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/**
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* Factory method used by do_CreateInstance
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*/
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nsresult nsMIMEInputStreamConstructor(nsISupports* outer, REFNSIID iid,
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void** result) {
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*result = nullptr;
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if (outer) return NS_ERROR_NO_AGGREGATION;
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RefPtr<nsMIMEInputStream> inst = new nsMIMEInputStream();
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if (!inst) return NS_ERROR_OUT_OF_MEMORY;
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return inst->QueryInterface(iid, result);
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}
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void nsMIMEInputStream::Serialize(
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InputStreamParams& aParams, FileDescriptorArray& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize, uint32_t* aSizeUsed,
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mozilla::ipc::ParentToChildStreamActorManager* aManager) {
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SerializeInternal(aParams, aFileDescriptors, aDelayedStart, aMaxSize,
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aSizeUsed, aManager);
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}
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void nsMIMEInputStream::Serialize(
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InputStreamParams& aParams, FileDescriptorArray& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize, uint32_t* aSizeUsed,
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mozilla::ipc::ChildToParentStreamActorManager* aManager) {
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SerializeInternal(aParams, aFileDescriptors, aDelayedStart, aMaxSize,
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aSizeUsed, aManager);
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}
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template <typename M>
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void nsMIMEInputStream::SerializeInternal(InputStreamParams& aParams,
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FileDescriptorArray& 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(aSizeUsed);
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*aSizeUsed = 0;
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MIMEInputStreamParams params;
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params.headers() = mHeaders.Clone();
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params.startedReading() = mStartedReading;
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if (!mStream) {
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aParams = params;
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return;
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}
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InputStreamParams wrappedParams;
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if (nsCOMPtr<nsIIPCSerializableInputStream> serializable =
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do_QueryInterface(mStream)) {
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InputStreamHelper::SerializeInputStream(mStream, wrappedParams,
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aFileDescriptors, aDelayedStart,
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aMaxSize, aSizeUsed, aManager);
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} else {
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// Falling back to sending the underlying stream over a pipe when
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// sending an nsMIMEInputStream over IPC is potentially wasteful
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// if it is sent several times. This can possibly happen with
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// fission. There are two ways to improve this, see bug 1648369
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// and bug 1648370.
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InputStreamHelper::SerializeInputStreamAsPipe(mStream, wrappedParams,
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aDelayedStart, aManager);
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}
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NS_ASSERTION(wrappedParams.type() != InputStreamParams::T__None,
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"Wrapped stream failed to serialize!");
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params.optionalStream().emplace(wrappedParams);
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aParams = params;
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}
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bool nsMIMEInputStream::Deserialize(
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const InputStreamParams& aParams,
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const FileDescriptorArray& aFileDescriptors) {
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if (aParams.type() != InputStreamParams::TMIMEInputStreamParams) {
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NS_ERROR("Received unknown parameters from the other process!");
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return false;
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}
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const MIMEInputStreamParams& params = aParams.get_MIMEInputStreamParams();
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const Maybe<InputStreamParams>& wrappedParams = params.optionalStream();
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if (wrappedParams.isSome()) {
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nsCOMPtr<nsIInputStream> stream;
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stream = InputStreamHelper::DeserializeInputStream(wrappedParams.ref(),
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aFileDescriptors);
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if (!stream) {
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NS_WARNING("Failed to deserialize wrapped stream!");
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return false;
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}
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// nsMIMEInputStream requires that the underlying data stream be seekable,
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// as is checked in `SetData`. Ensure that the stream we deserialized is
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// seekable before using it.
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nsCOMPtr<nsIInputStream> seekable;
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nsresult rv = mozilla::SeekableStreamWrapper::MaybeWrap(
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stream.forget(), getter_AddRefs(seekable));
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if (NS_FAILED(rv)) {
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NS_WARNING("Failed to ensure wrapped input stream is seekable");
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return false;
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}
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MOZ_ALWAYS_SUCCEEDS(SetData(seekable));
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}
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mHeaders = params.headers().Clone();
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mStartedReading = params.startedReading();
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return true;
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}
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NS_IMETHODIMP
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nsMIMEInputStream::Length(int64_t* aLength) {
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nsCOMPtr<nsIInputStreamLength> stream = do_QueryInterface(mStream);
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if (NS_WARN_IF(!stream)) {
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return NS_ERROR_FAILURE;
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}
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return stream->Length(aLength);
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}
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NS_IMETHODIMP
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nsMIMEInputStream::AsyncLengthWait(nsIInputStreamLengthCallback* aCallback,
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nsIEventTarget* aEventTarget) {
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nsCOMPtr<nsIAsyncInputStreamLength> stream = do_QueryInterface(mStream);
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if (NS_WARN_IF(!stream)) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIInputStreamLengthCallback> callback = aCallback ? this : nullptr;
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{
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MutexAutoLock lock(mMutex);
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mAsyncInputStreamLengthCallback = aCallback;
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}
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return stream->AsyncLengthWait(callback, aEventTarget);
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}
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NS_IMETHODIMP
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nsMIMEInputStream::OnInputStreamLengthReady(nsIAsyncInputStreamLength* aStream,
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int64_t aLength) {
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nsCOMPtr<nsIInputStreamLengthCallback> callback;
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{
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MutexAutoLock lock(mMutex);
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// We have been canceled in the meanwhile.
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if (!mAsyncInputStreamLengthCallback) {
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return NS_OK;
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}
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callback.swap(mAsyncInputStreamLengthCallback);
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}
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MOZ_ASSERT(callback);
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return callback->OnInputStreamLengthReady(this, aLength);
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}
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bool nsMIMEInputStream::IsSeekableInputStream() const {
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nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mStream);
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return !!seekable;
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}
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bool nsMIMEInputStream::IsAsyncInputStream() const {
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nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream);
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return !!asyncStream;
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}
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bool nsMIMEInputStream::IsInputStreamLength() const {
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nsCOMPtr<nsIInputStreamLength> stream = do_QueryInterface(mStream);
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return !!stream;
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}
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bool nsMIMEInputStream::IsAsyncInputStreamLength() const {
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nsCOMPtr<nsIAsyncInputStreamLength> stream = do_QueryInterface(mStream);
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return !!stream;
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}
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bool nsMIMEInputStream::IsCloneableInputStream() const {
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nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream);
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return !!stream;
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}
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// nsICloneableInputStream interface
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NS_IMETHODIMP
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nsMIMEInputStream::GetCloneable(bool* aCloneable) {
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nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream);
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if (!mStream) {
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return NS_ERROR_FAILURE;
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}
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return stream->GetCloneable(aCloneable);
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}
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NS_IMETHODIMP
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nsMIMEInputStream::Clone(nsIInputStream** aResult) {
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nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream);
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if (!mStream) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIInputStream> clonedStream;
|
|
nsresult rv = stream->Clone(getter_AddRefs(clonedStream));
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsIMIMEInputStream> mimeStream = new nsMIMEInputStream();
|
|
|
|
rv = mimeStream->SetData(clonedStream);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
for (const HeaderEntry& entry : mHeaders) {
|
|
rv = mimeStream->AddHeader(entry.name().get(), entry.value().get());
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
}
|
|
|
|
static_cast<nsMIMEInputStream*>(mimeStream.get())->mStartedReading =
|
|
mStartedReading;
|
|
|
|
mimeStream.forget(aResult);
|
|
return NS_OK;
|
|
}
|