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+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#pragma once
+
+#include <hicn/transport/core/packet.h>
+
+#define ASIO_STANDALONE
+#include <asio.hpp>
+#include <deque>
+#include <functional>
+
+namespace transport {
+
+using asio::ip::tcp;
+
+typedef std::function<void(const uint8_t *data, std::size_t size, bool is_last,
+ bool headers)>
+ ContentReceivedCallback;
+typedef std::function<bool(asio::ip::tcp::socket &socket)> OnConnectionClosed;
+typedef std::function<void()> ContentSentCallback;
+typedef std::deque<
+ std::pair<std::unique_ptr<utils::MemBuf>, ContentSentCallback>>
+ BufferQueue;
+
+class HTTPSession {
+ static constexpr uint32_t buffer_size = 1024 * 512;
+
+ enum class ConnectorState {
+ CLOSED,
+ CONNECTING,
+ CONNECTED,
+ };
+
+ public:
+ HTTPSession(asio::io_service &io_service, std::string &ip_address,
+ std::string &port, ContentReceivedCallback receive_callback,
+ OnConnectionClosed on_reconnect_callback, bool reverse = false);
+
+ HTTPSession(asio::ip::tcp::socket socket,
+ ContentReceivedCallback receive_callback,
+ OnConnectionClosed on_reconnect_callback, bool reverse = true);
+
+ ~HTTPSession();
+
+ void send(const uint8_t *buffer, std::size_t len,
+ ContentSentCallback &&content_sent = 0);
+
+ void send(utils::MemBuf *buffer, ContentSentCallback &&content_sent);
+
+ void close();
+
+ private:
+ void doConnect();
+
+ void doReadHeader();
+
+ void doReadBody(std::size_t body_size, std::size_t additional_bytes);
+
+ void doReadChunkedHeader();
+
+ void doWrite();
+
+ bool checkConnected();
+
+ private:
+ void handleRead(std::error_code ec, std::size_t length);
+ void tryReconnection();
+ void startConnectionTimer();
+ void handleDeadline(const std::error_code &ec);
+
+ asio::io_service &io_service_;
+ asio::ip::tcp::socket socket_;
+ asio::ip::tcp::resolver resolver_;
+ asio::ip::tcp::resolver::iterator endpoint_iterator_;
+ asio::steady_timer timer_;
+
+ BufferQueue write_msgs_;
+
+ asio::streambuf input_buffer_;
+
+ bool reverse_;
+ bool is_reconnection_;
+ bool data_available_;
+
+ std::size_t content_length_;
+
+ // Chunked encoding
+ bool is_last_chunk_;
+ bool chunked_;
+
+ ContentReceivedCallback receive_callback_;
+ OnConnectionClosed on_connection_closed_callback_;
+
+ // Connector state
+ ConnectorState state_;
+};
+
+} // namespace transport