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diff --git a/3rdparty/asio/src/examples/cpp11/http/server/connection.hpp b/3rdparty/asio/src/examples/cpp11/http/server/connection.hpp
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+//
+// connection.hpp
+// ~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 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_CONNECTION_HPP
+#define HTTP_CONNECTION_HPP
+
+#include <array>
+#include <memory>
+#include <asio.hpp>
+#include "reply.hpp"
+#include "request.hpp"
+#include "request_handler.hpp"
+#include "request_parser.hpp"
+
+namespace http {
+namespace server {
+
+class connection_manager;
+
+/// Represents a single connection from a client.
+class connection
+ : public std::enable_shared_from_this<connection>
+{
+public:
+ connection(const connection&) = delete;
+ connection& operator=(const connection&) = delete;
+
+ /// Construct a connection with the given socket.
+ explicit connection(asio::ip::tcp::socket socket,
+ connection_manager& manager, request_handler& handler);
+
+ /// Start the first asynchronous operation for the connection.
+ void start();
+
+ /// Stop all asynchronous operations associated with the connection.
+ void stop();
+
+private:
+ /// Perform an asynchronous read operation.
+ void do_read();
+
+ /// Perform an asynchronous write operation.
+ void do_write();
+
+ /// Socket for the connection.
+ asio::ip::tcp::socket socket_;
+
+ /// The manager for this connection.
+ connection_manager& connection_manager_;
+
+ /// The handler used to process the incoming request.
+ request_handler& request_handler_;
+
+ /// Buffer for incoming data.
+ std::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 std::shared_ptr<connection> connection_ptr;
+
+} // namespace server
+} // namespace http
+
+#endif // HTTP_CONNECTION_HPP