initial import

Net/samples/EchoServer/src/EchoServer.cpp

@@ -0,0 +1,228 @@
+//
+// EchoServer.cpp
+//
+// $Id: //poco/1.1.0/Net/samples/EchoServer/src/EchoServer.cpp#2 $
+//
+// This sample demonstrates the SocketReactor and SocketAcceptor classes.
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include "Net/SocketReactor.h"
+#include "Net/SocketAcceptor.h"
+#include "Net/SocketNotification.h"
+#include "Net/StreamSocket.h"
+#include "Net/ServerSocket.h"
+#include "Foundation/Observer.h"
+#include "Foundation/Exception.h"
+#include "Foundation/Thread.h"
+#include "Util/ServerApplication.h"
+#include "Util/Option.h"
+#include "Util/OptionSet.h"
+#include "Util/HelpFormatter.h"
+#include <iostream>
+
+
+using Net::SocketReactor;
+using Net::SocketAcceptor;
+using Net::ReadableNotification;
+using Net::ShutdownNotification;
+using Net::ServerSocket;
+using Net::StreamSocket;
+using Foundation::Observer;
+using Foundation::Thread;
+using Util::ServerApplication;
+using Util::Application;
+using Util::Option;
+using Util::OptionSet;
+using Util::HelpFormatter;
+
+
+class EchoServiceHandler
+{
+public:
+	EchoServiceHandler(StreamSocket& socket, SocketReactor& reactor):
+		_socket(socket),
+		_reactor(reactor),
+		_pBuffer(new char[BUFFER_SIZE])
+	{
+		Application& app = Application::instance();
+		app.logger().information("Connection from " + socket.peerAddress().toString());
+
+		_reactor.addEventHandler(_socket, Observer<EchoServiceHandler, ReadableNotification>(*this, &EchoServiceHandler::onReadable));
+		_reactor.addEventHandler(_socket, Observer<EchoServiceHandler, ShutdownNotification>(*this, &EchoServiceHandler::onShutdown));
+	}
+	
+	~EchoServiceHandler()
+	{
+		Application& app = Application::instance();
+		try
+		{
+			app.logger().information("Disconnecting " + _socket.peerAddress().toString());
+		}
+		catch (...)
+		{
+		}
+		_reactor.removeEventHandler(_socket, Observer<EchoServiceHandler, ReadableNotification>(*this, &EchoServiceHandler::onReadable));
+		_reactor.removeEventHandler(_socket, Observer<EchoServiceHandler, ShutdownNotification>(*this, &EchoServiceHandler::onShutdown));
+		delete [] _pBuffer;
+	}
+	
+	void onReadable(ReadableNotification* pNf)
+	{
+		pNf->release(); // we get ownership of the notification, but we do not need it, so we kiss it goodbye.
+		int n = _socket.receiveBytes(_pBuffer, BUFFER_SIZE);
+		if (n > 0)
+			_socket.sendBytes(_pBuffer, n);
+		else
+			delete this;
+	}
+	
+	void onShutdown(ShutdownNotification* pNf)
+	{
+		delete this;
+	}
+	
+private:
+	enum
+	{
+		BUFFER_SIZE = 1024
+	};
+	
+	StreamSocket   _socket;
+	SocketReactor& _reactor;
+	char*          _pBuffer;
+};
+
+
+class EchoServer: public Util::ServerApplication
+	/// The main application class.
+	///
+	/// This class handles command-line arguments and
+	/// configuration files.
+	/// Start the EchoServer executable with the help
+	/// option (/help on Windows, --help on Unix) for
+	/// the available command line options.
+	///
+	/// To use the sample configuration file (EchoServer.properties),
+	/// copy the file to the directory where the EchoServer executable
+	/// resides. If you start the debug version of the EchoServer
+	/// (EchoServerd[.exe]), you must also create a copy of the configuration
+	/// file named EchoServerd.properties. In the configuration file, you
+	/// can specify the port on which the server is listening (default
+	/// 9977) and the format of the date/time string sent back to the client.
+	///
+	/// To test the EchoServer you can use any telnet client (telnet localhost 9977).
+{
+public:
+	EchoServer(): _helpRequested(false)
+	{
+	}
+	
+	~EchoServer()
+	{
+	}
+
+protected:
+	void initialize(Application& self)
+	{
+		loadConfiguration(); // load default configuration files, if present
+		ServerApplication::initialize(self);
+	}
+		
+	void uninitialize()
+	{
+		ServerApplication::uninitialize();
+	}
+
+	void defineOptions(OptionSet& options)
+	{
+		ServerApplication::defineOptions(options);
+		
+		options.addOption(
+			Option("help", "h", "display help information on command line arguments")
+				.required(false)
+				.repeatable(false));
+	}
+
+	void handleOption(const std::string& name, const std::string& value)
+	{
+		ServerApplication::handleOption(name, value);
+
+		if (name == "help")
+			_helpRequested = true;
+	}
+
+	void displayHelp()
+	{
+		HelpFormatter helpFormatter(options());
+		helpFormatter.setCommand(commandName());
+		helpFormatter.setUsage("OPTIONS");
+		helpFormatter.setHeader("An echo server implemented using the Reactor and Acceptor patterns.");
+		helpFormatter.format(std::cout);
+	}
+
+	int main(const std::vector<std::string>& args)
+	{
+		if (_helpRequested)
+		{
+			displayHelp();
+		}
+		else
+		{
+			// get parameters from configuration file
+			unsigned short port = (unsigned short) config().getInt("EchoServer.port", 9977);
+			
+			// set-up a server socket
+			ServerSocket svs(port);
+			// set-up a SocketReactor...
+			SocketReactor reactor;
+			// ... and a SocketAcceptor
+			SocketAcceptor<EchoServiceHandler> acceptor(svs, reactor);
+			// run the reactor in its own thread so that we can wait for 
+			// a termination request
+			Thread thread;
+			thread.start(reactor);
+			// wait for CTRL-C or kill
+			waitForTerminationRequest();
+			// Stop the SocketReactor
+			reactor.stop();
+			thread.join();
+		}
+		return Application::EXIT_OK;
+	}
+	
+private:
+	bool _helpRequested;
+};
+
+
+int main(int argc, char** argv)
+{
+	EchoServer app;
+	return app.run(argc, argv);
+}