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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_BASE_PROTOBUF_HTTP_STREAM_REQUEST_H_
#define REMOTING_BASE_PROTOBUF_HTTP_STREAM_REQUEST_H_
#include <string_view>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/timer/timer.h"
#include "remoting/base/protobuf_http_request_base.h"
#include "services/network/public/cpp/simple_url_loader_stream_consumer.h"
namespace google {
namespace protobuf {
class MessageLite;
} // namespace protobuf
} // namespace google
namespace remoting {
class HttpStatus;
class ProtobufHttpClient;
class ProtobufHttpStreamParser;
// A server streaming request.
class ProtobufHttpStreamRequest final
: public ProtobufHttpRequestBase,
public network::SimpleURLLoaderStreamConsumer {
public:
template <typename MessageType>
using MessageCallback =
base::RepeatingCallback<void(std::unique_ptr<MessageType> message)>;
using StreamClosedCallback =
base::OnceCallback<void(const HttpStatus& status)>;
static constexpr base::TimeDelta kStreamReadyTimeoutDuration =
base::Seconds(30);
explicit ProtobufHttpStreamRequest(
std::unique_ptr<ProtobufHttpRequestConfig> config);
~ProtobufHttpStreamRequest() override;
// Sets a callback that gets called when the stream is ready to receive data.
void SetStreamReadyCallback(base::OnceClosure callback);
// Sets a callback that gets called when the stream is closed.
void SetStreamClosedCallback(StreamClosedCallback callback);
// Sets the callback to be called every time a new message is received.
// |MessageType| needs to be a protobuf message type.
template <typename MessageType>
void SetMessageCallback(const MessageCallback<MessageType>& callback) {
default_message_ = &MessageType::default_instance();
message_callback_ = base::BindRepeating(
[](MessageCallback<MessageType> callback,
std::unique_ptr<google::protobuf::MessageLite> generic_message) {
std::move(callback).Run(std::unique_ptr<MessageType>(
static_cast<MessageType*>(generic_message.release())));
},
callback);
}
private:
friend class ProtobufHttpClient;
// ProtobufHttpStreamParser callbacks.
void OnMessage(const std::string& message);
void OnStreamClosed(const HttpStatus& status);
// ProtobufHttpRequestBase implementations.
void OnAuthFailed(const HttpStatus& status) override;
void StartRequestInternal(
network::mojom::URLLoaderFactory* loader_factory) override;
base::TimeDelta GetRequestTimeoutDuration() const override;
// network::SimpleURLLoaderStreamConsumer implementations.
void OnDataReceived(std::string_view string_view,
base::OnceClosure resume) override;
void OnComplete(bool success) override;
void OnRetry(base::OnceClosure start_retry) override;
void OnStreamReadyTimeout();
// Used to create new response message instances.
raw_ptr<const google::protobuf::MessageLite> default_message_;
std::unique_ptr<ProtobufHttpStreamParser> stream_parser_;
base::OneShotTimer stream_ready_timeout_timer_;
base::OnceClosure stream_ready_callback_;
StreamClosedCallback stream_closed_callback_;
base::RepeatingCallback<void(std::unique_ptr<google::protobuf::MessageLite>)>
message_callback_;
};
} // namespace remoting
#endif // REMOTING_BASE_PROTOBUF_HTTP_STREAM_REQUEST_H_
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