More examples

Grzegorz Jabłoński
1 parent 91c7c002
Showing 8 changed files with 588 additions and 1 deletions
05-daytime1.cpp
06-daytime2.cpp
07-daytime3.cpp
08-daytime4.cpp
09-daytime5.cpp
10-daytime6.cpp
11-daytime7.cpp
makefile
+//
+// client.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <iostream>
+#include <boost/array.hpp>
+#include <asio.hpp>
+
+using asio::ip::tcp;
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc != 2)
+    {
+      std::cerr << "Usage: client <host>" << std::endl;
+      return 1;
+    }
+
+    asio::io_context io_context;
+
+    tcp::resolver resolver(io_context);
+    tcp::resolver::results_type endpoints =
+      resolver.resolve(argv[1], "daytime");
+
+    tcp::socket socket(io_context);
+    asio::connect(socket, endpoints);
+
+    for (;;)
+    {
+      boost::array<char, 128> buf;
+      asio::error_code error;
+
+      size_t len = socket.read_some(asio::buffer(buf), error);
+
+      if (error == asio::error::eof)
+        break; // Connection closed cleanly by peer.
+      else if (error)
+        throw asio::system_error(error); // Some other error.
+
+      std::cout.write(buf.data(), len);
+    }
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// server.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <ctime>
+#include <iostream>
+#include <string>
+#include <asio.hpp>
+
+using asio::ip::tcp;
+
+std::string make_daytime_string()
+{
+  using namespace std; // For time_t, time and ctime;
+  time_t now = time(0);
+  return ctime(&now);
+}
+
+int main()
+{
+  try
+  {
+    asio::io_context io_context;
+
+    tcp::acceptor acceptor(io_context, tcp::endpoint(tcp::v4(), 13));
+
+    for (;;)
+    {
+      tcp::socket socket(io_context);
+      acceptor.accept(socket);
+
+      std::string message = make_daytime_string();
+
+      asio::error_code ignored_error;
+      asio::write(socket, asio::buffer(message), ignored_error);
+    }
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// server.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <ctime>
+#include <iostream>
+#include <string>
+#include <boost/bind/bind.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <asio.hpp>
+
+using asio::ip::tcp;
+
+std::string make_daytime_string()
+{
+  using namespace std; // For time_t, time and ctime;
+  time_t now = time(0);
+  return ctime(&now);
+}
+
+class tcp_connection
+  : public boost::enable_shared_from_this<tcp_connection>
+{
+public:
+  typedef boost::shared_ptr<tcp_connection> pointer;
+
+  static pointer create(asio::io_context& io_context)
+  {
+    return pointer(new tcp_connection(io_context));
+  }
+
+  tcp::socket& socket()
+  {
+    return socket_;
+  }
+
+  void start()
+  {
+    message_ = make_daytime_string();
+
+    asio::async_write(socket_, asio::buffer(message_),
+        std::bind(&tcp_connection::handle_write, shared_from_this(),
+          std::placeholders::_1,
+          std::placeholders::_2));
+  }
+
+private:
+  tcp_connection(asio::io_context& io_context)
+    : socket_(io_context)
+  {
+  }
+
+  void handle_write(const asio::error_code& /*error*/,
+      size_t /*bytes_transferred*/)
+  {
+  }
+
+  tcp::socket socket_;
+  std::string message_;
+};
+
+class tcp_server
+{
+public:
+  tcp_server(asio::io_context& io_context)
+    : io_context_(io_context),
+      acceptor_(io_context, tcp::endpoint(tcp::v4(), 13))
+  {
+    start_accept();
+  }
+
+private:
+  void start_accept()
+  {
+    tcp_connection::pointer new_connection =
+      tcp_connection::create(io_context_);
+
+    acceptor_.async_accept(new_connection->socket(),
+        std::bind(&tcp_server::handle_accept, this, new_connection,
+          std::placeholders::_1));
+  }
+
+  void handle_accept(tcp_connection::pointer new_connection,
+      const asio::error_code& error)
+  {
+    if (!error)
+    {
+      new_connection->start();
+    }
+
+    start_accept();
+  }
+
+  asio::io_context& io_context_;
+  tcp::acceptor acceptor_;
+};
+
+int main()
+{
+  try
+  {
+    asio::io_context io_context;
+    tcp_server server(io_context);
+    io_context.run();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// client.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <iostream>
+#include <boost/array.hpp>
+#include <asio.hpp>
+
+using asio::ip::udp;
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc != 2)
+    {
+      std::cerr << "Usage: client <host>" << std::endl;
+      return 1;
+    }
+
+    asio::io_context io_context;
+
+    udp::resolver resolver(io_context);
+    udp::endpoint receiver_endpoint =
+      *resolver.resolve(udp::v4(), argv[1], "daytime").begin();
+
+    udp::socket socket(io_context);
+    socket.open(udp::v4());
+
+    boost::array<char, 1> send_buf  = {{ 0 }};
+    socket.send_to(asio::buffer(send_buf), receiver_endpoint);
+
+    boost::array<char, 128> recv_buf;
+    udp::endpoint sender_endpoint;
+    size_t len = socket.receive_from(
+        asio::buffer(recv_buf), sender_endpoint);
+
+    std::cout.write(recv_buf.data(), len);
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// server.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <ctime>
+#include <iostream>
+#include <string>
+#include <boost/array.hpp>
+#include <asio.hpp>
+
+using asio::ip::udp;
+
+std::string make_daytime_string()
+{
+  using namespace std; // For time_t, time and ctime;
+  time_t now = time(0);
+  return ctime(&now);
+}
+
+int main()
+{
+  try
+  {
+    asio::io_context io_context;
+
+    udp::socket socket(io_context, udp::endpoint(udp::v4(), 13));
+
+    for (;;)
+    {
+      boost::array<char, 1> recv_buf;
+      udp::endpoint remote_endpoint;
+      socket.receive_from(asio::buffer(recv_buf), remote_endpoint);
+
+      std::string message = make_daytime_string();
+
+      asio::error_code ignored_error;
+      socket.send_to(asio::buffer(message),
+          remote_endpoint, 0, ignored_error);
+    }
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// server.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <ctime>
+#include <iostream>
+#include <string>
+#include <boost/array.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/shared_ptr.hpp>
+#include <asio.hpp>
+
+using asio::ip::udp;
+
+std::string make_daytime_string()
+{
+  using namespace std; // For time_t, time and ctime;
+  time_t now = time(0);
+  return ctime(&now);
+}
+
+class udp_server
+{
+public:
+  udp_server(asio::io_context& io_context)
+    : socket_(io_context, udp::endpoint(udp::v4(), 13))
+  {
+    start_receive();
+  }
+
+private:
+  void start_receive()
+  {
+    socket_.async_receive_from(
+        asio::buffer(recv_buffer_), remote_endpoint_,
+        std::bind(&udp_server::handle_receive, this,
+          std::placeholders::_1,
+          std::placeholders::_2));
+  }
+
+  void handle_receive(const asio::error_code& error,
+      std::size_t /*bytes_transferred*/)
+  {
+    if (!error)
+    {
+      boost::shared_ptr<std::string> message(
+          new std::string(make_daytime_string()));
+
+      socket_.async_send_to(asio::buffer(*message), remote_endpoint_,
+          std::bind(&udp_server::handle_send, this, message,
+            std::placeholders::_1,
+            std::placeholders::_2));
+
+      start_receive();
+    }
+  }
+
+  void handle_send(boost::shared_ptr<std::string> /*message*/,
+      const asio::error_code& /*error*/,
+      std::size_t /*bytes_transferred*/)
+  {
+  }
+
+  udp::socket socket_;
+  udp::endpoint remote_endpoint_;
+  boost::array<char, 1> recv_buffer_;
+};
+
+int main()
+{
+  try
+  {
+    asio::io_context io_context;
+    udp_server server(io_context);
+    io_context.run();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
+//
+// server.cpp
+// ~~~~~~~~~~
+//
+// 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)
+//
+
+#include <ctime>
+#include <iostream>
+#include <string>
+#include <boost/array.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <asio.hpp>
+
+using asio::ip::tcp;
+using asio::ip::udp;
+
+std::string make_daytime_string()
+{
+  using namespace std; // For time_t, time and ctime;
+  time_t now = time(0);
+  return ctime(&now);
+}
+
+class tcp_connection
+  : public boost::enable_shared_from_this<tcp_connection>
+{
+public:
+  typedef boost::shared_ptr<tcp_connection> pointer;
+
+  static pointer create(asio::io_context& io_context)
+  {
+    return pointer(new tcp_connection(io_context));
+  }
+
+  tcp::socket& socket()
+  {
+    return socket_;
+  }
+
+  void start()
+  {
+    message_ = make_daytime_string();
+
+    asio::async_write(socket_, asio::buffer(message_),
+        boost::bind(&tcp_connection::handle_write, shared_from_this()));
+  }
+
+private:
+  tcp_connection(asio::io_context& io_context)
+    : socket_(io_context)
+  {
+  }
+
+  void handle_write()
+  {
+  }
+
+  tcp::socket socket_;
+  std::string message_;
+};
+
+class tcp_server
+{
+public:
+  tcp_server(asio::io_context& io_context)
+    : io_context_(io_context),
+      acceptor_(io_context, tcp::endpoint(tcp::v4(), 13))
+  {
+    start_accept();
+  }
+
+private:
+  void start_accept()
+  {
+    tcp_connection::pointer new_connection =
+      tcp_connection::create(io_context_);
+
+    acceptor_.async_accept(new_connection->socket(),
+        std::bind(&tcp_server::handle_accept, this, new_connection,
+          std::placeholders::_1));
+  }
+
+  void handle_accept(tcp_connection::pointer new_connection,
+      const asio::error_code& error)
+  {
+    if (!error)
+    {
+      new_connection->start();
+    }
+
+    start_accept();
+  }
+
+  asio::io_context& io_context_;
+  tcp::acceptor acceptor_;
+};
+
+class udp_server
+{
+public:
+  udp_server(asio::io_context& io_context)
+    : socket_(io_context, udp::endpoint(udp::v4(), 13))
+  {
+    start_receive();
+  }
+
+private:
+  void start_receive()
+  {
+    socket_.async_receive_from(
+        asio::buffer(recv_buffer_), remote_endpoint_,
+        std::bind(&udp_server::handle_receive, this,
+          std::placeholders::_1));
+  }
+
+  void handle_receive(const asio::error_code& error)
+  {
+    if (!error)
+    {
+      boost::shared_ptr<std::string> message(
+          new std::string(make_daytime_string()));
+
+      socket_.async_send_to(asio::buffer(*message), remote_endpoint_,
+          boost::bind(&udp_server::handle_send, this, message));
+
+      start_receive();
+    }
+  }
+
+  void handle_send(boost::shared_ptr<std::string> /*message*/)
+  {
+  }
+
+  udp::socket socket_;
+  udp::endpoint remote_endpoint_;
+  boost::array<char, 1> recv_buffer_;
+};
+
+int main()
+{
+  try
+  {
+    asio::io_context io_context;
+    tcp_server server1(io_context);
+    udp_server server2(io_context);
+    io_context.run();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << e.what() << std::endl;
+  }
+
+  return 0;
+}
+
@@ -4,7 +4,7 @@ CFLAGS=-ggdb -Wall -pedantic -D_REENTRANT -DASIO_STANDALONE -DASIO_HAS_CO_AWAIT 
 %: %.cpp
 	g++-10 -std=c++20 -fcoroutines $(CFLAGS) $< -o $@ -lpthread
  
-EXECS = 00-timer1 01-timer2 02-timer3 03-timer4 04-timer5
+EXECS = 00-timer1 01-timer2 02-timer3 03-timer4 04-timer5 05-daytime1 06-daytime2 07-daytime3 08-daytime4 09-daytime5 10-daytime6 11-daytime7
  
 all: $(EXECS)