diff options
Diffstat (limited to '3rdparty/asio/src/examples/cpp03/windows/transmit_file.cpp')
-rw-r--r-- | 3rdparty/asio/src/examples/cpp03/windows/transmit_file.cpp | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/3rdparty/asio/src/examples/cpp03/windows/transmit_file.cpp b/3rdparty/asio/src/examples/cpp03/windows/transmit_file.cpp new file mode 100644 index 00000000000..8ca9e1790fc --- /dev/null +++ b/3rdparty/asio/src/examples/cpp03/windows/transmit_file.cpp @@ -0,0 +1,171 @@ +// +// transmit_file.cpp +// ~~~~~~~~~~~~~~~~~ +// +// 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) +// + +#include <ctime> +#include <iostream> +#include <string> +#include <boost/bind.hpp> +#include <boost/shared_ptr.hpp> +#include <boost/enable_shared_from_this.hpp> +#include "asio.hpp" + +#if defined(ASIO_HAS_WINDOWS_OVERLAPPED_PTR) + +using asio::ip::tcp; +using asio::windows::overlapped_ptr; +using asio::windows::random_access_handle; + +// A wrapper for the TransmitFile overlapped I/O operation. +template <typename Handler> +void transmit_file(tcp::socket& socket, + random_access_handle& file, Handler handler) +{ + // Construct an OVERLAPPED-derived object to contain the handler. + overlapped_ptr overlapped(socket.get_executor().context(), handler); + + // Initiate the TransmitFile operation. + BOOL ok = ::TransmitFile(socket.native_handle(), + file.native_handle(), 0, 0, overlapped.get(), 0, 0); + DWORD last_error = ::GetLastError(); + + // Check if the operation completed immediately. + if (!ok && last_error != ERROR_IO_PENDING) + { + // The operation completed immediately, so a completion notification needs + // to be posted. When complete() is called, ownership of the OVERLAPPED- + // derived object passes to the io_context. + asio::error_code ec(last_error, + asio::error::get_system_category()); + overlapped.complete(ec, 0); + } + else + { + // The operation was successfully initiated, so ownership of the + // OVERLAPPED-derived object has passed to the io_context. + overlapped.release(); + } +} + +class connection + : public boost::enable_shared_from_this<connection> +{ +public: + typedef boost::shared_ptr<connection> pointer; + + static pointer create(asio::io_context& io_context, + const std::string& filename) + { + return pointer(new connection(io_context, filename)); + } + + tcp::socket& socket() + { + return socket_; + } + + void start() + { + asio::error_code ec; + file_.assign(::CreateFile(filename_.c_str(), GENERIC_READ, 0, 0, + OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, 0), ec); + if (file_.is_open()) + { + transmit_file(socket_, file_, + boost::bind(&connection::handle_write, shared_from_this(), + asio::placeholders::error, + asio::placeholders::bytes_transferred)); + } + } + +private: + connection(asio::io_context& io_context, const std::string& filename) + : socket_(io_context), + filename_(filename), + file_(io_context) + { + } + + void handle_write(const asio::error_code& /*error*/, + size_t /*bytes_transferred*/) + { + asio::error_code ignored_ec; + socket_.shutdown(tcp::socket::shutdown_both, ignored_ec); + } + + tcp::socket socket_; + std::string filename_; + random_access_handle file_; +}; + +class server +{ +public: + server(asio::io_context& io_context, + unsigned short port, const std::string& filename) + : acceptor_(io_context, tcp::endpoint(tcp::v4(), port)), + filename_(filename) + { + start_accept(); + } + +private: + void start_accept() + { + connection::pointer new_connection = + connection::create(acceptor_.get_executor().context(), filename_); + + acceptor_.async_accept(new_connection->socket(), + boost::bind(&server::handle_accept, this, new_connection, + asio::placeholders::error)); + } + + void handle_accept(connection::pointer new_connection, + const asio::error_code& error) + { + if (!error) + { + new_connection->start(); + } + + start_accept(); + } + + tcp::acceptor acceptor_; + std::string filename_; +}; + +int main(int argc, char* argv[]) +{ + try + { + if (argc != 3) + { + std::cerr << "Usage: transmit_file <port> <filename>\n"; + return 1; + } + + asio::io_context io_context; + + using namespace std; // For atoi. + server s(io_context, atoi(argv[1]), argv[2]); + + io_context.run(); + } + catch (std::exception& e) + { + std::cerr << e.what() << std::endl; + } + + return 0; +} + +#else // defined(ASIO_HAS_WINDOWS_OVERLAPPED_PTR) +# error Overlapped I/O not available on this platform +#endif // defined(ASIO_HAS_WINDOWS_OVERLAPPED_PTR) |