1 files changed, 182 insertions, 0 deletions
diff --git a/netwerk/protocol/http/Http2Push.h b/netwerk/protocol/http/Http2Push.h
new file mode 100644
index 0000000000..b7e25c2028
--- /dev/null
+++ b/netwerk/protocol/http/Http2Push.h
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef mozilla_net_Http2Push_Internal_h
+#define mozilla_net_Http2Push_Internal_h
+
+// HTTP/2 - RFC 7540
+// https://www.rfc-editor.org/rfc/rfc7540.txt
+
+#include "Http2Session.h"
+#include "Http2StreamBase.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/UniquePtr.h"
+#include "nsHttpRequestHead.h"
+#include "nsIRequestContext.h"
+#include "nsString.h"
+#include "PSpdyPush.h"
+
+namespace mozilla {
+namespace net {
+
+class Http2PushTransactionBuffer;
+
+class Http2PushedStream final : public Http2StreamBase {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Http2PushedStream, override)
+
+  Http2PushedStream(Http2PushTransactionBuffer* aTransaction,
+                    Http2Session* aSession, Http2StreamBase* aAssociatedStream,
+                    uint32_t aID,
+                    uint64_t aCurrentForegroundTabOuterContentWindowId);
+
+  Http2PushedStream* GetHttp2PushedStream() override { return this; }
+  bool GetPushComplete();
+
+  // The consumer stream is the synthetic pull stream hooked up to this push
+  Http2StreamBase* GetConsumerStream() { return mConsumerStream; };
+
+  void SetConsumerStream(Http2StreamBase* consumer);
+  [[nodiscard]] bool GetHashKey(nsCString& key);
+
+  // override of Http2StreamBase
+  [[nodiscard]] nsresult ReadSegments(nsAHttpSegmentReader*, uint32_t,
+                                      uint32_t*) override;
+  [[nodiscard]] nsresult WriteSegments(nsAHttpSegmentWriter*, uint32_t,
+                                       uint32_t*) override;
+  void AdjustInitialWindow() override;
+
+  nsAHttpTransaction* Transaction() override { return mTransaction; }
+  nsIRequestContext* RequestContext() override { return mRequestContext; };
+  void ConnectPushedStream(Http2StreamBase* stream);
+
+  [[nodiscard]] bool TryOnPush();
+  [[nodiscard]] static bool TestOnPush(Http2StreamBase* stream);
+
+  virtual bool DeferCleanup(nsresult status) override;
+  void SetDeferCleanupOnSuccess(bool val) { mDeferCleanupOnSuccess = val; }
+
+  bool IsOrphaned(TimeStamp now);
+  void OnPushFailed() {
+    mDeferCleanupOnPush = false;
+    mOnPushFailed = true;
+  }
+
+  [[nodiscard]] nsresult GetBufferedData(char* buf, uint32_t count,
+                                         uint32_t* countWritten);
+
+  // overload of Http2StreamBase
+  virtual bool HasSink() override { return !!mConsumerStream; }
+  void SetPushComplete() { mPushCompleted = true; }
+  virtual void CurrentBrowserIdChanged(uint64_t) override;
+
+  nsCString& GetRequestString() { return mRequestString; }
+  nsCString& GetResourceUrl() { return mResourceUrl; }
+
+  nsresult ConvertPushHeaders(Http2Decompressor* decompressor,
+                              nsACString& aHeadersIn, nsACString& aHeadersOut);
+
+  void CloseStream(nsresult reason) override;
+
+ protected:
+  nsresult CallToReadData(uint32_t count, uint32_t* countRead) override;
+  nsresult CallToWriteData(uint32_t count, uint32_t* countWritten) override;
+  nsresult GenerateHeaders(nsCString& aCompressedData,
+                           uint8_t& firstFrameFlags) override;
+
+ private:
+  virtual ~Http2PushedStream() = default;
+  // paired request stream that consumes from real http/2 one.. null until a
+  // match is made.
+  Http2StreamBase* mConsumerStream{nullptr};
+
+  nsCOMPtr<nsIRequestContext> mRequestContext;
+
+  nsAHttpTransaction* mAssociatedTransaction;
+
+  Http2PushTransactionBuffer* mBufferedPush;
+  mozilla::TimeStamp mLastRead;
+
+  nsCString mHashKey;
+  nsresult mStatus{NS_OK};
+  bool mPushCompleted{false};  // server push FIN received
+  bool mDeferCleanupOnSuccess{true};
+
+  // mDeferCleanupOnPush prevents Http2Session::CleanupStream() from
+  // destroying the push stream on an error code during the period between
+  // when we need to do OnPush() on another thread and the time it takes
+  // for that event to create a synthetic pull stream attached to this
+  // object. That synthetic pull will become mConsuemerStream.
+  // Ths is essentially a delete protecting reference.
+  bool mDeferCleanupOnPush{false};
+  bool mOnPushFailed{false};
+  nsCString mRequestString;
+  nsCString mResourceUrl;
+
+  uint32_t mDefaultPriorityDependency;
+
+  // The underlying HTTP transaction. This pointer is used as the key
+  // in the Http2Session mStreamTransactionHash so it is important to
+  // keep a reference to it as long as this stream is a member of that hash.
+  // (i.e. don't change it or release it after it is set in the ctor).
+  RefPtr<nsAHttpTransaction> const mTransaction;
+};
+
+class Http2PushTransactionBuffer final : public nsAHttpTransaction {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSAHTTPTRANSACTION
+
+  Http2PushTransactionBuffer();
+
+  [[nodiscard]] nsresult GetBufferedData(char* buf, uint32_t count,
+                                         uint32_t* countWritten);
+  void SetPushStream(Http2PushedStream* stream) { mPushStream = stream; }
+
+ private:
+  virtual ~Http2PushTransactionBuffer();
+  uint64_t Available();
+
+  const static uint32_t kDefaultBufferSize = 4096;
+
+  nsresult mStatus{NS_OK};
+  nsHttpRequestHead* mRequestHead{nullptr};
+  Http2PushedStream* mPushStream{nullptr};
+  bool mIsDone{false};
+
+  UniquePtr<char[]> mBufferedHTTP1;
+  uint32_t mBufferedHTTP1Size{kDefaultBufferSize};
+  uint32_t mBufferedHTTP1Used{0};
+  uint32_t mBufferedHTTP1Consumed{0};
+};
+
+class Http2PushedStreamWrapper : public nsISupports {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  bool DispatchRelease();
+
+  explicit Http2PushedStreamWrapper(Http2PushedStream* aPushStream);
+
+  nsCString& GetRequestString() { return mRequestString; }
+  nsCString& GetResourceUrl() { return mResourceUrl; }
+  Http2PushedStream* GetStream();
+  void OnPushFailed();
+  uint32_t StreamID() { return mStreamID; }
+
+ private:
+  virtual ~Http2PushedStreamWrapper();
+
+  nsCString mRequestString;
+  nsCString mResourceUrl;
+  uint32_t mStreamID;
+  WeakPtr<Http2StreamBase> mStream;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_Http2Push_Internal_h