summaryrefslogtreecommitdiffstats
path: root/netwerk/base/nsMIMEInputStream.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--netwerk/base/nsMIMEInputStream.cpp500
1 files changed, 500 insertions, 0 deletions
diff --git a/netwerk/base/nsMIMEInputStream.cpp b/netwerk/base/nsMIMEInputStream.cpp
new file mode 100644
index 0000000000..d0d9fe09a5
--- /dev/null
+++ b/netwerk/base/nsMIMEInputStream.cpp
@@ -0,0 +1,500 @@
+/* -*- 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:
+ 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;
+ mozilla::Atomic<bool, mozilla::Relaxed> mStartedReading{false};
+
+ mozilla::Mutex mMutex{"nsMIMEInputStream::mMutex"};
+ nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback MOZ_GUARDED_BY(mMutex);
+
+ // 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;
+}
+
+#define INITSTREAMS \
+ if (!mStartedReading) { \
+ NS_ENSURE_TRUE(mStream, NS_ERROR_UNEXPECTED); \
+ mStartedReading = true; \
+ }
+
+// 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::StreamStatus() {
+ INITSTREAMS;
+ return mStream->StreamStatus();
+}
+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;
+ {
+ mozilla::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;
+
+ {
+ mozilla::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;
+ {
+ mozilla::MutexAutoLock lock(mMutex);
+ mAsyncInputStreamLengthCallback = aCallback;
+ }
+
+ return stream->AsyncLengthWait(callback, aEventTarget);
+}
+
+NS_IMETHODIMP
+nsMIMEInputStream::OnInputStreamLengthReady(nsIAsyncInputStreamLength* aStream,
+ int64_t aLength) {
+ nsCOMPtr<nsIInputStreamLengthCallback> callback;
+ {
+ mozilla::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 =
+ static_cast<bool>(mStartedReading);
+
+ mimeStream.forget(aResult);
+ return NS_OK;
+}