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Diffstat (limited to '3rdparty/asio/src/examples/cpp03/serialization/connection.hpp')
-rw-r--r-- | 3rdparty/asio/src/examples/cpp03/serialization/connection.hpp | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/3rdparty/asio/src/examples/cpp03/serialization/connection.hpp b/3rdparty/asio/src/examples/cpp03/serialization/connection.hpp deleted file mode 100644 index a1fa2a19e8e..00000000000 --- a/3rdparty/asio/src/examples/cpp03/serialization/connection.hpp +++ /dev/null @@ -1,188 +0,0 @@ -// -// connection.hpp -// ~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2016 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 SERIALIZATION_CONNECTION_HPP -#define SERIALIZATION_CONNECTION_HPP - -#include <asio.hpp> -#include <boost/archive/text_iarchive.hpp> -#include <boost/archive/text_oarchive.hpp> -#include <boost/bind.hpp> -#include <boost/shared_ptr.hpp> -#include <boost/tuple/tuple.hpp> -#include <iomanip> -#include <string> -#include <sstream> -#include <vector> - -namespace s11n_example { - -/// The connection class provides serialization primitives on top of a socket. -/** - * Each message sent using this class consists of: - * @li An 8-byte header containing the length of the serialized data in - * hexadecimal. - * @li The serialized data. - */ -class connection -{ -public: - /// Constructor. - connection(asio::io_context& io_context) - : socket_(io_context) - { - } - - /// Get the underlying socket. Used for making a connection or for accepting - /// an incoming connection. - asio::ip::tcp::socket& socket() - { - return socket_; - } - - /// Asynchronously write a data structure to the socket. - template <typename T, typename Handler> - void async_write(const T& t, Handler handler) - { - // Serialize the data first so we know how large it is. - std::ostringstream archive_stream; - boost::archive::text_oarchive archive(archive_stream); - archive << t; - outbound_data_ = archive_stream.str(); - - // Format the header. - std::ostringstream header_stream; - header_stream << std::setw(header_length) - << std::hex << outbound_data_.size(); - if (!header_stream || header_stream.str().size() != header_length) - { - // Something went wrong, inform the caller. - asio::error_code error(asio::error::invalid_argument); - socket_.get_io_context().post(boost::bind(handler, error)); - return; - } - outbound_header_ = header_stream.str(); - - // Write the serialized data to the socket. We use "gather-write" to send - // both the header and the data in a single write operation. - std::vector<asio::const_buffer> buffers; - buffers.push_back(asio::buffer(outbound_header_)); - buffers.push_back(asio::buffer(outbound_data_)); - asio::async_write(socket_, buffers, handler); - } - - /// Asynchronously read a data structure from the socket. - template <typename T, typename Handler> - void async_read(T& t, Handler handler) - { - // Issue a read operation to read exactly the number of bytes in a header. - void (connection::*f)( - const asio::error_code&, - T&, boost::tuple<Handler>) - = &connection::handle_read_header<T, Handler>; - asio::async_read(socket_, asio::buffer(inbound_header_), - boost::bind(f, - this, asio::placeholders::error, boost::ref(t), - boost::make_tuple(handler))); - } - - /// Handle a completed read of a message header. The handler is passed using - /// a tuple since boost::bind seems to have trouble binding a function object - /// created using boost::bind as a parameter. - template <typename T, typename Handler> - void handle_read_header(const asio::error_code& e, - T& t, boost::tuple<Handler> handler) - { - if (e) - { - boost::get<0>(handler)(e); - } - else - { - // Determine the length of the serialized data. - std::istringstream is(std::string(inbound_header_, header_length)); - std::size_t inbound_data_size = 0; - if (!(is >> std::hex >> inbound_data_size)) - { - // Header doesn't seem to be valid. Inform the caller. - asio::error_code error(asio::error::invalid_argument); - boost::get<0>(handler)(error); - return; - } - - // Start an asynchronous call to receive the data. - inbound_data_.resize(inbound_data_size); - void (connection::*f)( - const asio::error_code&, - T&, boost::tuple<Handler>) - = &connection::handle_read_data<T, Handler>; - asio::async_read(socket_, asio::buffer(inbound_data_), - boost::bind(f, this, - asio::placeholders::error, boost::ref(t), handler)); - } - } - - /// Handle a completed read of message data. - template <typename T, typename Handler> - void handle_read_data(const asio::error_code& e, - T& t, boost::tuple<Handler> handler) - { - if (e) - { - boost::get<0>(handler)(e); - } - else - { - // Extract the data structure from the data just received. - try - { - std::string archive_data(&inbound_data_[0], inbound_data_.size()); - std::istringstream archive_stream(archive_data); - boost::archive::text_iarchive archive(archive_stream); - archive >> t; - } - catch (std::exception& e) - { - // Unable to decode data. - asio::error_code error(asio::error::invalid_argument); - boost::get<0>(handler)(error); - return; - } - - // Inform caller that data has been received ok. - boost::get<0>(handler)(e); - } - } - -private: - /// The underlying socket. - asio::ip::tcp::socket socket_; - - /// The size of a fixed length header. - enum { header_length = 8 }; - - /// Holds an outbound header. - std::string outbound_header_; - - /// Holds the outbound data. - std::string outbound_data_; - - /// Holds an inbound header. - char inbound_header_[header_length]; - - /// Holds the inbound data. - std::vector<char> inbound_data_; -}; - -typedef boost::shared_ptr<connection> connection_ptr; - -} // namespace s11n_example - -#endif // SERIALIZATION_CONNECTION_HPP |