diff options
Diffstat (limited to 'netwerk/base/nsMIMEInputStream.cpp')
| -rw-r--r-- | netwerk/base/nsMIMEInputStream.cpp | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/netwerk/base/nsMIMEInputStream.cpp b/netwerk/base/nsMIMEInputStream.cpp new file mode 100644 index 0000000000..77ef9054fe --- /dev/null +++ b/netwerk/base/nsMIMEInputStream.cpp @@ -0,0 +1,508 @@ +/* -*- Mode: C++; tab-width: 4; 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/. */ + +/** + * The MIME stream separates headers and a datastream. It also allows + * automatic creation of the content-length header. + */ + +#include "nsMIMEInputStream.h" + +#include <utility> + +#include "ipc/IPCMessageUtils.h" +#include "mozilla/Mutex.h" +#include "mozilla/ipc/InputStreamUtils.h" +#include "nsCOMPtr.h" +#include "nsComponentManagerUtils.h" +#include "nsIAsyncInputStream.h" +#include "nsIClassInfoImpl.h" +#include "nsIHttpHeaderVisitor.h" +#include "nsIIPCSerializableInputStream.h" +#include "nsIInputStreamLength.h" +#include "nsIMIMEInputStream.h" +#include "nsISeekableStream.h" +#include "nsString.h" + +using namespace mozilla::ipc; +using mozilla::Maybe; + +class nsMIMEInputStream : public nsIMIMEInputStream, + public nsISeekableStream, + public nsIIPCSerializableInputStream, + public nsIAsyncInputStream, + public nsIInputStreamCallback, + public nsIInputStreamLength, + public nsIAsyncInputStreamLength, + public nsIInputStreamLengthCallback, + public nsICloneableInputStream { + virtual ~nsMIMEInputStream() = default; + + public: + nsMIMEInputStream() = default; + + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIINPUTSTREAM + NS_DECL_NSIMIMEINPUTSTREAM + NS_DECL_NSISEEKABLESTREAM + NS_DECL_NSITELLABLESTREAM + NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM + NS_DECL_NSIASYNCINPUTSTREAM + NS_DECL_NSIINPUTSTREAMCALLBACK + NS_DECL_NSIINPUTSTREAMLENGTH + NS_DECL_NSIASYNCINPUTSTREAMLENGTH + NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK + NS_DECL_NSICLONEABLEINPUTSTREAM + + private: + void InitStreams(); + + struct MOZ_STACK_CLASS ReadSegmentsState { + nsCOMPtr<nsIInputStream> mThisStream; + nsWriteSegmentFun mWriter{nullptr}; + void* mClosure{nullptr}; + }; + static nsresult ReadSegCb(nsIInputStream* aIn, void* aClosure, + const char* aFromRawSegment, uint32_t aToOffset, + uint32_t aCount, uint32_t* aWriteCount); + + bool IsSeekableInputStream() const; + bool IsAsyncInputStream() const; + bool IsInputStreamLength() const; + bool IsAsyncInputStreamLength() const; + bool IsCloneableInputStream() const; + + nsTArray<HeaderEntry> mHeaders; + + nsCOMPtr<nsIInputStream> mStream; + bool mStartedReading{false}; + + mozilla::Mutex mMutex MOZ_UNANNOTATED{"nsMIMEInputStream::mMutex"}; + + // This is protected by mutex. + nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback; + + // This is protected by mutex. + nsCOMPtr<nsIInputStreamLengthCallback> mAsyncInputStreamLengthCallback; +}; + +NS_IMPL_ADDREF(nsMIMEInputStream) +NS_IMPL_RELEASE(nsMIMEInputStream) + +NS_IMPL_CLASSINFO(nsMIMEInputStream, nullptr, nsIClassInfo::THREADSAFE, + NS_MIMEINPUTSTREAM_CID) + +NS_INTERFACE_MAP_BEGIN(nsMIMEInputStream) + NS_INTERFACE_MAP_ENTRY(nsIMIMEInputStream) + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIInputStream, nsIMIMEInputStream) + NS_INTERFACE_MAP_ENTRY(nsITellableStream) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsISeekableStream, IsSeekableInputStream()) + NS_INTERFACE_MAP_ENTRY(nsIIPCSerializableInputStream) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStream, IsAsyncInputStream()) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamCallback, + IsAsyncInputStream()) + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMIMEInputStream) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamLength, + IsInputStreamLength()) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStreamLength, + IsAsyncInputStreamLength()) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamLengthCallback, + IsAsyncInputStreamLength()) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsICloneableInputStream, + IsCloneableInputStream()) + NS_IMPL_QUERY_CLASSINFO(nsMIMEInputStream) +NS_INTERFACE_MAP_END + +NS_IMPL_CI_INTERFACE_GETTER(nsMIMEInputStream, nsIMIMEInputStream, + nsIAsyncInputStream, nsIInputStream, + nsISeekableStream, nsITellableStream) + +NS_IMETHODIMP +nsMIMEInputStream::AddHeader(const char* aName, const char* aValue) { + NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE); + + HeaderEntry* entry = mHeaders.AppendElement(); + entry->name().Append(aName); + entry->value().Append(aValue); + + return NS_OK; +} + +NS_IMETHODIMP +nsMIMEInputStream::VisitHeaders(nsIHttpHeaderVisitor* visitor) { + nsresult rv; + + for (auto& header : mHeaders) { + rv = visitor->VisitHeader(header.name(), header.value()); + if (NS_FAILED(rv)) { + return rv; + } + } + return NS_OK; +} + +NS_IMETHODIMP +nsMIMEInputStream::SetData(nsIInputStream* aStream) { + NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE); + + mStream = aStream; + return NS_OK; +} + +NS_IMETHODIMP +nsMIMEInputStream::GetData(nsIInputStream** aStream) { + NS_ENSURE_ARG_POINTER(aStream); + *aStream = do_AddRef(mStream).take(); + return NS_OK; +} + +// set up the internal streams +void nsMIMEInputStream::InitStreams() { + NS_ASSERTION(!mStartedReading, + "Don't call initStreams twice without rewinding"); + + mStartedReading = true; +} + +#define INITSTREAMS \ + if (!mStartedReading) { \ + NS_ENSURE_TRUE(mStream, NS_ERROR_UNEXPECTED); \ + InitStreams(); \ + } + +// Reset mStartedReading when Seek-ing to start +NS_IMETHODIMP +nsMIMEInputStream::Seek(int32_t whence, int64_t offset) { + NS_ENSURE_TRUE(mStream, NS_ERROR_UNEXPECTED); + + nsresult rv; + nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream); + + if (whence == NS_SEEK_SET && offset == 0) { + rv = stream->Seek(whence, offset); + if (NS_SUCCEEDED(rv)) mStartedReading = false; + } else { + INITSTREAMS; + rv = stream->Seek(whence, offset); + } + + return rv; +} + +// Proxy ReadSegments since we need to be a good little nsIInputStream +NS_IMETHODIMP nsMIMEInputStream::ReadSegments(nsWriteSegmentFun aWriter, + void* aClosure, uint32_t aCount, + uint32_t* _retval) { + INITSTREAMS; + ReadSegmentsState state; + // Disambiguate ambiguous nsIInputStream. + state.mThisStream = + static_cast<nsIInputStream*>(static_cast<nsIMIMEInputStream*>(this)); + state.mWriter = aWriter; + state.mClosure = aClosure; + return mStream->ReadSegments(ReadSegCb, &state, aCount, _retval); +} + +nsresult nsMIMEInputStream::ReadSegCb(nsIInputStream* aIn, void* aClosure, + const char* aFromRawSegment, + uint32_t aToOffset, uint32_t aCount, + uint32_t* aWriteCount) { + ReadSegmentsState* state = (ReadSegmentsState*)aClosure; + return (state->mWriter)(state->mThisStream, state->mClosure, aFromRawSegment, + aToOffset, aCount, aWriteCount); +} + +/** + * Forward everything else to the mStream after calling InitStreams() + */ + +// nsIInputStream +NS_IMETHODIMP nsMIMEInputStream::Close(void) { + INITSTREAMS; + return mStream->Close(); +} +NS_IMETHODIMP nsMIMEInputStream::Available(uint64_t* _retval) { + INITSTREAMS; + return mStream->Available(_retval); +} +NS_IMETHODIMP nsMIMEInputStream::Read(char* buf, uint32_t count, + uint32_t* _retval) { + INITSTREAMS; + return mStream->Read(buf, count, _retval); +} +NS_IMETHODIMP nsMIMEInputStream::IsNonBlocking(bool* aNonBlocking) { + INITSTREAMS; + return mStream->IsNonBlocking(aNonBlocking); +} + +// nsIAsyncInputStream +NS_IMETHODIMP +nsMIMEInputStream::CloseWithStatus(nsresult aStatus) { + INITSTREAMS; + nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream); + return asyncStream->CloseWithStatus(aStatus); +} + +NS_IMETHODIMP +nsMIMEInputStream::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags, + uint32_t aRequestedCount, + nsIEventTarget* aEventTarget) { + INITSTREAMS; + nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream); + if (NS_WARN_IF(!asyncStream)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIInputStreamCallback> callback = aCallback ? this : nullptr; + { + MutexAutoLock lock(mMutex); + if (NS_WARN_IF(mAsyncWaitCallback && aCallback && + mAsyncWaitCallback != aCallback)) { + return NS_ERROR_FAILURE; + } + + mAsyncWaitCallback = aCallback; + } + + return asyncStream->AsyncWait(callback, aFlags, aRequestedCount, + aEventTarget); +} + +// nsIInputStreamCallback + +NS_IMETHODIMP +nsMIMEInputStream::OnInputStreamReady(nsIAsyncInputStream* aStream) { + nsCOMPtr<nsIInputStreamCallback> callback; + + { + MutexAutoLock lock(mMutex); + + // We have been canceled in the meanwhile. + if (!mAsyncWaitCallback) { + return NS_OK; + } + + callback.swap(mAsyncWaitCallback); + } + + MOZ_ASSERT(callback); + return callback->OnInputStreamReady(this); +} + +// nsITellableStream +NS_IMETHODIMP nsMIMEInputStream::Tell(int64_t* _retval) { + INITSTREAMS; + nsCOMPtr<nsITellableStream> stream = do_QueryInterface(mStream); + return stream->Tell(_retval); +} + +// nsISeekableStream +NS_IMETHODIMP nsMIMEInputStream::SetEOF(void) { + INITSTREAMS; + nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream); + return stream->SetEOF(); +} + +/** + * Factory method used by do_CreateInstance + */ + +nsresult nsMIMEInputStreamConstructor(REFNSIID iid, void** result) { + *result = nullptr; + + RefPtr<nsMIMEInputStream> inst = new nsMIMEInputStream(); + if (!inst) return NS_ERROR_OUT_OF_MEMORY; + + return inst->QueryInterface(iid, result); +} + +void nsMIMEInputStream::SerializedComplexity(uint32_t aMaxSize, + uint32_t* aSizeUsed, + uint32_t* aPipes, + uint32_t* aTransferables) { + if (nsCOMPtr<nsIIPCSerializableInputStream> serializable = + do_QueryInterface(mStream)) { + InputStreamHelper::SerializedComplexity(mStream, aMaxSize, aSizeUsed, + aPipes, aTransferables); + } else { + *aPipes = 1; + } +} + +void nsMIMEInputStream::Serialize(InputStreamParams& aParams, uint32_t aMaxSize, + uint32_t* aSizeUsed) { + MOZ_ASSERT(aSizeUsed); + *aSizeUsed = 0; + + MIMEInputStreamParams params; + params.headers() = mHeaders.Clone(); + params.startedReading() = mStartedReading; + + if (!mStream) { + aParams = params; + return; + } + + InputStreamParams wrappedParams; + + if (nsCOMPtr<nsIIPCSerializableInputStream> serializable = + do_QueryInterface(mStream)) { + InputStreamHelper::SerializeInputStream(mStream, wrappedParams, aMaxSize, + aSizeUsed); + } else { + // Falling back to sending the underlying stream over a pipe when + // sending an nsMIMEInputStream over IPC is potentially wasteful + // if it is sent several times. This can possibly happen with + // fission. There are two ways to improve this, see bug 1648369 + // and bug 1648370. + InputStreamHelper::SerializeInputStreamAsPipe(mStream, wrappedParams); + } + + NS_ASSERTION(wrappedParams.type() != InputStreamParams::T__None, + "Wrapped stream failed to serialize!"); + + params.optionalStream().emplace(wrappedParams); + aParams = params; +} + +bool nsMIMEInputStream::Deserialize(const InputStreamParams& aParams) { + if (aParams.type() != InputStreamParams::TMIMEInputStreamParams) { + NS_ERROR("Received unknown parameters from the other process!"); + return false; + } + + const MIMEInputStreamParams& params = aParams.get_MIMEInputStreamParams(); + const Maybe<InputStreamParams>& wrappedParams = params.optionalStream(); + + if (wrappedParams.isSome()) { + nsCOMPtr<nsIInputStream> stream; + stream = InputStreamHelper::DeserializeInputStream(wrappedParams.ref()); + if (!stream) { + NS_WARNING("Failed to deserialize wrapped stream!"); + return false; + } + + MOZ_ALWAYS_SUCCEEDS(SetData(stream)); + } + + mHeaders = params.headers().Clone(); + mStartedReading = params.startedReading(); + + return true; +} + +NS_IMETHODIMP +nsMIMEInputStream::Length(int64_t* aLength) { + nsCOMPtr<nsIInputStreamLength> stream = do_QueryInterface(mStream); + if (NS_WARN_IF(!stream)) { + return NS_ERROR_FAILURE; + } + + return stream->Length(aLength); +} + +NS_IMETHODIMP +nsMIMEInputStream::AsyncLengthWait(nsIInputStreamLengthCallback* aCallback, + nsIEventTarget* aEventTarget) { + nsCOMPtr<nsIAsyncInputStreamLength> stream = do_QueryInterface(mStream); + if (NS_WARN_IF(!stream)) { + return NS_ERROR_FAILURE; + } + + nsCOMPtr<nsIInputStreamLengthCallback> callback = aCallback ? this : nullptr; + { + MutexAutoLock lock(mMutex); + mAsyncInputStreamLengthCallback = aCallback; + } + + return stream->AsyncLengthWait(callback, aEventTarget); +} + +NS_IMETHODIMP +nsMIMEInputStream::OnInputStreamLengthReady(nsIAsyncInputStreamLength* aStream, + int64_t aLength) { + nsCOMPtr<nsIInputStreamLengthCallback> callback; + { + MutexAutoLock lock(mMutex); + // We have been canceled in the meanwhile. + if (!mAsyncInputStreamLengthCallback) { + return NS_OK; + } + + callback.swap(mAsyncInputStreamLengthCallback); + } + + MOZ_ASSERT(callback); + return callback->OnInputStreamLengthReady(this, aLength); +} + +bool nsMIMEInputStream::IsSeekableInputStream() const { + nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mStream); + return !!seekable; +} + +bool nsMIMEInputStream::IsAsyncInputStream() const { + nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mStream); + return !!asyncStream; +} + +bool nsMIMEInputStream::IsInputStreamLength() const { + nsCOMPtr<nsIInputStreamLength> stream = do_QueryInterface(mStream); + return !!stream; +} + +bool nsMIMEInputStream::IsAsyncInputStreamLength() const { + nsCOMPtr<nsIAsyncInputStreamLength> stream = do_QueryInterface(mStream); + return !!stream; +} + +bool nsMIMEInputStream::IsCloneableInputStream() const { + nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream); + return !!stream; +} + +// nsICloneableInputStream interface + +NS_IMETHODIMP +nsMIMEInputStream::GetCloneable(bool* aCloneable) { + nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream); + if (!mStream) { + return NS_ERROR_FAILURE; + } + + return stream->GetCloneable(aCloneable); +} + +NS_IMETHODIMP +nsMIMEInputStream::Clone(nsIInputStream** aResult) { + nsCOMPtr<nsICloneableInputStream> stream = do_QueryInterface(mStream); + 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; +} |