[Dsim-svn] SF.net SVN: dsim:[99] trunk/dsim/test/boost/asio

[<sng...@us...>]

Revision: 99
          http://dsim.svn.sourceforge.net/dsim/?rev=99&view=rev
Author:   snguyenkim
Date:     2010-07-16 12:56:45 +0000 (Fri, 16 Jul 2010)

Log Message:
-----------
Chatting program using boost asio

Added Paths:
-----------
    trunk/dsim/test/boost/asio/chat/
    trunk/dsim/test/boost/asio/chat/Makefile.am
    trunk/dsim/test/boost/asio/chat/chat_client.cpp
    trunk/dsim/test/boost/asio/chat/chat_message.hpp
    trunk/dsim/test/boost/asio/chat/chat_server.cpp

Added: trunk/dsim/test/boost/asio/chat/Makefile.am
===================================================================
--- trunk/dsim/test/boost/asio/chat/Makefile.am	                        (rev 0)
+++ trunk/dsim/test/boost/asio/chat/Makefile.am	2010-07-16 12:56:45 UTC (rev 99)
@@ -0,0 +1,19 @@
+## test/boost/asio sub-directory
+include $(top_srcdir)/Makefile.common
+
+##
+
+MAINTAINERCLEANFILES = Makefile.in
+
+check_PROGRAMS = chat_client chat_server
+
+chat_client_SOURCES = chat_client.cpp
+chat_client_CXXFLAGS = $(BOOST_CFLAGS) $(BOOST_CFLAGS)
+chat_client_LDFLAGS = $(BOOST_LIBS) $(BOOST_DATE_TIME_LIB) $(BOOST_ASIO_LIB)
+chat_client_LDADD =
+
+chat_server_SOURCES = chat_server.cpp
+chat_server_CXXFLAGS = $(BOOST_CFLAGS) $(BOOST_CFLAGS)
+chat_server_LDFLAGS = $(BOOST_LIBS) $(BOOST_DATE_TIME_LIB) $(BOOST_ASIO_LIB)
+chat_server_LDADD =
+

Added: trunk/dsim/test/boost/asio/chat/chat_client.cpp
===================================================================
--- trunk/dsim/test/boost/asio/chat/chat_client.cpp	                        (rev 0)
+++ trunk/dsim/test/boost/asio/chat/chat_client.cpp	2010-07-16 12:56:45 UTC (rev 99)
@@ -0,0 +1,187 @@
+//
+// chat_client.cpp
+// ~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2010 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 <cstdlib>
+#include <deque>
+#include <iostream>
+#include <boost/bind.hpp>
+#include <boost/asio.hpp>
+#include <boost/thread.hpp>
+#include "chat_message.hpp"
+
+using boost::asio::ip::tcp;
+
+typedef std::deque<chat_message> chat_message_queue;
+
+class chat_client
+{
+public:
+  chat_client(boost::asio::io_service& io_service,
+      tcp::resolver::iterator endpoint_iterator)
+    : io_service_(io_service),
+      socket_(io_service)
+  {
+    tcp::endpoint endpoint = *endpoint_iterator;
+    socket_.async_connect(endpoint,
+        boost::bind(&chat_client::handle_connect, this,
+          boost::asio::placeholders::error, ++endpoint_iterator));
+  }
+
+  void write(const chat_message& msg)
+  {
+    io_service_.post(boost::bind(&chat_client::do_write, this, msg));
+  }
+
+  void close()
+  {
+    io_service_.post(boost::bind(&chat_client::do_close, this));
+  }
+
+private:
+
+  void handle_connect(const boost::system::error_code& error,
+      tcp::resolver::iterator endpoint_iterator)
+  {
+    if (!error)
+    {
+      boost::asio::async_read(socket_,
+          boost::asio::buffer(read_msg_.data(), chat_message::header_length),
+          boost::bind(&chat_client::handle_read_header, this,
+            boost::asio::placeholders::error));
+    }
+    else if (endpoint_iterator != tcp::resolver::iterator())
+    {
+      socket_.close();
+      tcp::endpoint endpoint = *endpoint_iterator;
+      socket_.async_connect(endpoint,
+          boost::bind(&chat_client::handle_connect, this,
+            boost::asio::placeholders::error, ++endpoint_iterator));
+    }
+  }
+
+  void handle_read_header(const boost::system::error_code& error)
+  {
+    if (!error && read_msg_.decode_header())
+    {
+      boost::asio::async_read(socket_,
+          boost::asio::buffer(read_msg_.body(), read_msg_.body_length()),
+          boost::bind(&chat_client::handle_read_body, this,
+            boost::asio::placeholders::error));
+    }
+    else
+    {
+      do_close();
+    }
+  }
+
+  void handle_read_body(const boost::system::error_code& error)
+  {
+    if (!error)
+    {
+      std::cout.write(read_msg_.body(), read_msg_.body_length());
+      std::cout << "\n";
+      boost::asio::async_read(socket_,
+          boost::asio::buffer(read_msg_.data(), chat_message::header_length),
+          boost::bind(&chat_client::handle_read_header, this,
+            boost::asio::placeholders::error));
+    }
+    else
+    {
+      do_close();
+    }
+  }
+
+  void do_write(chat_message msg)
+  {
+    bool write_in_progress = !write_msgs_.empty();
+    write_msgs_.push_back(msg);
+    if (!write_in_progress)
+    {
+      boost::asio::async_write(socket_,
+          boost::asio::buffer(write_msgs_.front().data(),
+            write_msgs_.front().length()),
+          boost::bind(&chat_client::handle_write, this,
+            boost::asio::placeholders::error));
+    }
+  }
+
+  void handle_write(const boost::system::error_code& error)
+  {
+    if (!error)
+    {
+      write_msgs_.pop_front();
+      if (!write_msgs_.empty())
+      {
+        boost::asio::async_write(socket_,
+            boost::asio::buffer(write_msgs_.front().data(),
+              write_msgs_.front().length()),
+            boost::bind(&chat_client::handle_write, this,
+              boost::asio::placeholders::error));
+      }
+    }
+    else
+    {
+      do_close();
+    }
+  }
+
+  void do_close()
+  {
+    socket_.close();
+  }
+
+private:
+  boost::asio::io_service& io_service_;
+  tcp::socket socket_;
+  chat_message read_msg_;
+  chat_message_queue write_msgs_;
+};
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc != 3)
+    {
+      std::cerr << "Usage: chat_client <host> <port>\n";
+      return 1;
+    }
+
+    boost::asio::io_service io_service;
+
+    tcp::resolver resolver(io_service);
+    tcp::resolver::query query(argv[1], argv[2]);
+    tcp::resolver::iterator iterator = resolver.resolve(query);
+
+    chat_client c(io_service, iterator);
+
+    boost::thread t(boost::bind(&boost::asio::io_service::run, &io_service));
+
+    char line[chat_message::max_body_length + 1];
+    while (std::cin.getline(line, chat_message::max_body_length + 1))
+    {
+      using namespace std; // For strlen and memcpy.
+      chat_message msg;
+      msg.body_length(strlen(line));
+      memcpy(msg.body(), line, msg.body_length());
+      msg.encode_header();
+      c.write(msg);
+    }
+
+    c.close();
+    t.join();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Exception: " << e.what() << "\n";
+  }
+
+  return 0;
+}

Added: trunk/dsim/test/boost/asio/chat/chat_message.hpp
===================================================================
--- trunk/dsim/test/boost/asio/chat/chat_message.hpp	                        (rev 0)
+++ trunk/dsim/test/boost/asio/chat/chat_message.hpp	2010-07-16 12:56:45 UTC (rev 99)
@@ -0,0 +1,93 @@
+//
+// chat_message.hpp
+// ~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2010 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 CHAT_MESSAGE_HPP
+#define CHAT_MESSAGE_HPP
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+class chat_message
+{
+public:
+  enum { header_length = 4 };
+  enum { max_body_length = 512 };
+
+  chat_message()
+    : body_length_(0)
+  {
+  }
+
+  const char* data() const
+  {
+    return data_;
+  }
+
+  char* data()
+  {
+    return data_;
+  }
+
+  size_t length() const
+  {
+    return header_length + body_length_;
+  }
+
+  const char* body() const
+  {
+    return data_ + header_length;
+  }
+
+  char* body()
+  {
+    return data_ + header_length;
+  }
+
+  size_t body_length() const
+  {
+    return body_length_;
+  }
+
+  void body_length(size_t length)
+  {
+    body_length_ = length;
+    if (body_length_ > max_body_length)
+      body_length_ = max_body_length;
+  }
+
+  bool decode_header()
+  {
+    using namespace std; // For strncat and atoi.
+    char header[header_length + 1] = "";
+    strncat(header, data_, header_length);
+    body_length_ = atoi(header);
+    if (body_length_ > max_body_length)
+    {
+      body_length_ = 0;
+      return false;
+    }
+    return true;
+  }
+
+  void encode_header()
+  {
+    using namespace std; // For sprintf and memcpy.
+    char header[header_length + 1] = "";
+    sprintf(header, "%4d", body_length_);
+    memcpy(data_, header, header_length);
+  }
+
+private:
+  char data_[header_length + max_body_length];
+  size_t body_length_;
+};
+
+#endif // CHAT_MESSAGE_HPP

Added: trunk/dsim/test/boost/asio/chat/chat_server.cpp
===================================================================
--- trunk/dsim/test/boost/asio/chat/chat_server.cpp	                        (rev 0)
+++ trunk/dsim/test/boost/asio/chat/chat_server.cpp	2010-07-16 12:56:45 UTC (rev 99)
@@ -0,0 +1,244 @@
+//
+// chat_server.cpp
+// ~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2010 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 <algorithm>
+#include <cstdlib>
+#include <deque>
+#include <iostream>
+#include <list>
+#include <set>
+#include <boost/bind.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/asio.hpp>
+#include "chat_message.hpp"
+
+using boost::asio::ip::tcp;
+
+//----------------------------------------------------------------------
+
+typedef std::deque<chat_message> chat_message_queue;
+
+//----------------------------------------------------------------------
+
+class chat_participant
+{
+public:
+  virtual ~chat_participant() {}
+  virtual void deliver(const chat_message& msg) = 0;
+};
+
+typedef boost::shared_ptr<chat_participant> chat_participant_ptr;
+
+//----------------------------------------------------------------------
+
+class chat_room
+{
+public:
+  void join(chat_participant_ptr participant)
+  {
+    participants_.insert(participant);
+    std::for_each(recent_msgs_.begin(), recent_msgs_.end(),
+        boost::bind(&chat_participant::deliver, participant, _1));
+  }
+
+  void leave(chat_participant_ptr participant)
+  {
+    participants_.erase(participant);
+  }
+
+  void deliver(const chat_message& msg)
+  {
+    recent_msgs_.push_back(msg);
+    while (recent_msgs_.size() > max_recent_msgs)
+      recent_msgs_.pop_front();
+
+    std::for_each(participants_.begin(), participants_.end(),
+        boost::bind(&chat_participant::deliver, _1, boost::ref(msg)));
+  }
+
+private:
+  std::set<chat_participant_ptr> participants_;
+  enum { max_recent_msgs = 100 };
+  chat_message_queue recent_msgs_;
+};
+
+//----------------------------------------------------------------------
+
+class chat_session
+  : public chat_participant,
+    public boost::enable_shared_from_this<chat_session>
+{
+public:
+  chat_session(boost::asio::io_service& io_service, chat_room& room)
+    : socket_(io_service),
+      room_(room)
+  {
+  }
+
+  tcp::socket& socket()
+  {
+    return socket_;
+  }
+
+  void start()
+  {
+    room_.join(shared_from_this());
+    boost::asio::async_read(socket_,
+        boost::asio::buffer(read_msg_.data(), chat_message::header_length),
+        boost::bind(
+          &chat_session::handle_read_header, shared_from_this(),
+          boost::asio::placeholders::error));
+  }
+
+  void deliver(const chat_message& msg)
+  {
+    bool write_in_progress = !write_msgs_.empty();
+    write_msgs_.push_back(msg);
+    if (!write_in_progress)
+    {
+      boost::asio::async_write(socket_,
+          boost::asio::buffer(write_msgs_.front().data(),
+            write_msgs_.front().length()),
+          boost::bind(&chat_session::handle_write, shared_from_this(),
+            boost::asio::placeholders::error));
+    }
+  }
+
+  void handle_read_header(const boost::system::error_code& error)
+  {
+    if (!error && read_msg_.decode_header())
+    {
+      boost::asio::async_read(socket_,
+          boost::asio::buffer(read_msg_.body(), read_msg_.body_length()),
+          boost::bind(&chat_session::handle_read_body, shared_from_this(),
+            boost::asio::placeholders::error));
+    }
+    else
+    {
+      room_.leave(shared_from_this());
+    }
+  }
+
+  void handle_read_body(const boost::system::error_code& error)
+  {
+    if (!error)
+    {
+      room_.deliver(read_msg_);
+      boost::asio::async_read(socket_,
+          boost::asio::buffer(read_msg_.data(), chat_message::header_length),
+          boost::bind(&chat_session::handle_read_header, shared_from_this(),
+            boost::asio::placeholders::error));
+    }
+    else
+    {
+      room_.leave(shared_from_this());
+    }
+  }
+
+  void handle_write(const boost::system::error_code& error)
+  {
+    if (!error)
+    {
+      write_msgs_.pop_front();
+      if (!write_msgs_.empty())
+      {
+        boost::asio::async_write(socket_,
+            boost::asio::buffer(write_msgs_.front().data(),
+              write_msgs_.front().length()),
+            boost::bind(&chat_session::handle_write, shared_from_this(),
+              boost::asio::placeholders::error));
+      }
+    }
+    else
+    {
+      room_.leave(shared_from_this());
+    }
+  }
+
+private:
+  tcp::socket socket_;
+  chat_room& room_;
+  chat_message read_msg_;
+  chat_message_queue write_msgs_;
+};
+
+typedef boost::shared_ptr<chat_session> chat_session_ptr;
+
+//----------------------------------------------------------------------
+
+class chat_server
+{
+public:
+  chat_server(boost::asio::io_service& io_service,
+      const tcp::endpoint& endpoint)
+    : io_service_(io_service),
+      acceptor_(io_service, endpoint)
+  {
+    chat_session_ptr new_session(new chat_session(io_service_, room_));
+    acceptor_.async_accept(new_session->socket(),
+        boost::bind(&chat_server::handle_accept, this, new_session,
+          boost::asio::placeholders::error));
+  }
+
+  void handle_accept(chat_session_ptr session,
+      const boost::system::error_code& error)
+  {
+    if (!error)
+    {
+      session->start();
+      chat_session_ptr new_session(new chat_session(io_service_, room_));
+      acceptor_.async_accept(new_session->socket(),
+          boost::bind(&chat_server::handle_accept, this, new_session,
+            boost::asio::placeholders::error));
+    }
+  }
+
+private:
+  boost::asio::io_service& io_service_;
+  tcp::acceptor acceptor_;
+  chat_room room_;
+};
+
+typedef boost::shared_ptr<chat_server> chat_server_ptr;
+typedef std::list<chat_server_ptr> chat_server_list;
+
+//----------------------------------------------------------------------
+
+int main(int argc, char* argv[])
+{
+  try
+  {
+    if (argc < 2)
+    {
+      std::cerr << "Usage: chat_server <port> [<port> ...]\n";
+      return 1;
+    }
+
+    boost::asio::io_service io_service;
+
+    chat_server_list servers;
+    for (int i = 1; i < argc; ++i)
+    {
+      using namespace std; // For atoi.
+      tcp::endpoint endpoint(tcp::v4(), atoi(argv[i]));
+      chat_server_ptr server(new chat_server(io_service, endpoint));
+      servers.push_back(server);
+    }
+
+    io_service.run();
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Exception: " << e.what() << "\n";
+  }
+
+  return 0;
+}


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