moved asio folder and tested catkin-isolated build

asio/src/examples/cpp03/http/server3/connection.hpp

@@ -0,0 +1,78 @@
+//
+// connection.hpp
+// ~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef HTTP_SERVER3_CONNECTION_HPP
+#define HTTP_SERVER3_CONNECTION_HPP
+
+#include <asio.hpp>
+#include <boost/array.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include "reply.hpp"
+#include "request.hpp"
+#include "request_handler.hpp"
+#include "request_parser.hpp"
+
+namespace http {
+namespace server3 {
+
+/// Represents a single connection from a client.
+class connection
+  : public boost::enable_shared_from_this<connection>,
+    private boost::noncopyable
+{
+public:
+  /// Construct a connection with the given io_context.
+  explicit connection(asio::io_context& io_context,
+      request_handler& handler);
+
+  /// Get the socket associated with the connection.
+  asio::ip::tcp::socket& socket();
+
+  /// Start the first asynchronous operation for the connection.
+  void start();
+
+private:
+  /// Handle completion of a read operation.
+  void handle_read(const asio::error_code& e,
+      std::size_t bytes_transferred);
+
+  /// Handle completion of a write operation.
+  void handle_write(const asio::error_code& e);
+
+  /// Strand to ensure the connection's handlers are not called concurrently.
+  asio::strand<asio::io_context::executor_type> strand_;
+
+  /// Socket for the connection.
+  asio::ip::tcp::socket socket_;
+
+  /// The handler used to process the incoming request.
+  request_handler& request_handler_;
+
+  /// Buffer for incoming data.
+  boost::array<char, 8192> buffer_;
+
+  /// The incoming request.
+  request request_;
+
+  /// The parser for the incoming request.
+  request_parser request_parser_;
+
+  /// The reply to be sent back to the client.
+  reply reply_;
+};
+
+typedef boost::shared_ptr<connection> connection_ptr;
+
+} // namespace server3
+} // namespace http
+
+#endif // HTTP_SERVER3_CONNECTION_HPP