wire_stream.h

// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef ACTIONENGINE_NET_WEBSOCKETS_WIRE_STREAM_H_
#define ACTIONENGINE_NET_WEBSOCKETS_WIRE_STREAM_H_
 
#include <cstdint>
#include <memory>
#include <optional>
#include <string>
#include <string_view>
 
#define BOOST_ASIO_NO_DEPRECATED
 
#include <absl/base/nullability.h>
#include <absl/base/thread_annotations.h>
#include <absl/log/check.h>
#include <absl/status/status.h>
#include <absl/status/statusor.h>
#include <absl/strings/str_format.h>
#include <boost/asio/ip/tcp.hpp>
 
#include "actionengine/concurrency/concurrency.h"
#include "actionengine/data/types.h"
#include "actionengine/net/stream.h"
#include "actionengine/net/websockets/fiber_aware_websocket_stream.h"
#include "actionengine/service/service.h"
 
namespace act::net {

class WebsocketWireStream final : public WireStream {
 public:
  explicit WebsocketWireStream(std::unique_ptr<BoostWebsocketStream> stream,
                               std::string_view id = "");
 
  explicit WebsocketWireStream(FiberAwareWebsocketStream stream,
                               std::string_view id = "");
 
  ~WebsocketWireStream() override;
 
  absl::Status Send(WireMessage message) override;
 
  absl::StatusOr<std::optional<WireMessage>> Receive(
      absl::Duration timeout) override;
 
  absl::Status Start() override;
 
  absl::Status Accept() override;
 
  void HalfClose() override;
 
  void Abort() override;
 
  absl::Status GetStatus() const override { return status_; }
 
  [[nodiscard]] std::string GetId() const override { return id_; }
 
  [[nodiscard]] const void* absl_nonnull GetImpl() const override {
    return &stream_;
  }
 
  template <typename Sink>
  friend void AbslStringify(Sink& sink, const WebsocketWireStream& stream) {
    absl::Format(&sink, "WebsocketWireStream(id: %s, status: %v)", stream.id_,
                 stream.status_);
  }
 
 private:
  absl::Status SendInternal(WireMessage message)
      ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_);
 
  absl::Status HalfCloseInternal() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mu_);
 
  mutable act::Mutex mu_;
 
  FiberAwareWebsocketStream stream_;
  bool half_closed_ ABSL_GUARDED_BY(mu_) = false;
  bool closed_ ABSL_GUARDED_BY(mu_) = false;
  std::string id_;
 
  absl::Status status_;
};
 
absl::StatusOr<std::unique_ptr<WebsocketWireStream>> MakeWebsocketWireStream(
    std::string_view address = "127.0.0.1", uint16_t port = 20000,
    std::string_view target = "/", std::string_view id = "",
    PrepareStreamFn prepare_stream = PrepareClientStream);
 
}  // namespace act::net
 
#endif  // ACTIONENGINE_NET_WEBSOCKETS_WIRE_STREAM_H_