Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+}