/// <summary>
/// Run example
/// </summary>
public static void RunExample()
{
//We need to define what happens when packets are received.
//To do this we add an incoming packet handler for a 'Message' packet type.
//
//We will define what we want the handler to do inline by using a lambda expression
//http://msdn.microsoft.com/en-us/library/bb397687.aspx.
//We could also just point the AppendGlobalIncomingPacketHandler method
//to a standard method (See AdvancedSend example)
//
//This handler will convert the incoming raw bytes into a string (this is what
//the <string> bit means) and then write that string to the local console window.
NetworkComms.AppendGlobalIncomingPacketHandler <string>("Message", (packetHeader, connection, incomingString) => { Console.WriteLine("\n ... Incoming message from " + connection.ToString() + " saying '" + incomingString + "'."); });
//Start listening for incoming 'TCP' connections.
//We want to select a random port on all available adaptors so provide
//an IPEndPoint using IPAddress.Any and port 0.
//See also Connection.StartListening(ConnectionType.UDP, IPEndPoint)
Connection.StartListening(ConnectionType.TCP, new System.Net.IPEndPoint(System.Net.IPAddress.Any, 0));
//Print the IP addresses and ports we are listening on to make sure everything
//worked as expected.
Console.WriteLine("Listening for TCP messages on:");
foreach (System.Net.IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
//We loop here to allow any number of test messages to be sent and received
while (true)
{
//Request a message to send somewhere
Console.WriteLine("\nPlease enter your message and press enter (Type 'exit' to quit):");
string stringToSend = Console.ReadLine();
//If the user has typed exit then we leave our loop and end the example
if (stringToSend == "exit")
{
break;
}
else
{
//Once we have a message we need to know where to send it
//We have created a small wrapper class to help keep things clean here
ConnectionInfo targetServerConnectionInfo = ExampleHelper.GetServerDetails();
//There are loads of ways of sending data (see AdvancedSend example for more)
//but the most simple, which we use here, just uses an IP address (string) and port (integer)
//We pull these values out of the ConnectionInfo object we got above and voila!
NetworkComms.SendObject("Message", ((System.Net.IPEndPoint)targetServerConnectionInfo.RemoteEndPoint).Address.ToString(), ((System.Net.IPEndPoint)targetServerConnectionInfo.RemoteEndPoint).Port, stringToSend);
}
}
//We should always call shutdown on NetworkComms.Net if we have used it
NetworkComms.Shutdown();
}
/// <summary>
/// Run the AdvancedSend example.
/// </summary>
public static void RunExample()
{
Console.WriteLine("Unmanaged Connection Example ...\n");
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
Console.WriteLine("\nNOTE: From this point on make sure both clients are configured in the same way if you want the example to work.");
Console.WriteLine("\nIMPORTANT!! - Many of the features offered by NetworkComms.Net rely on managed connections, " +
"i.e. those which enable the custom ApplicationLayerProtocol. If you use unmanaged connections, i.e. where the custom " +
"application protocol has been disabled, you must take into account TCP packet fragmentation and concatenation, " +
"correctly handling it, for all circumstances.");
//Choose between unmanaged TCP or UDP
SelectConnectionType();
//Add a packet handler for dealing with incoming unmanaged data
NetworkComms.AppendGlobalIncomingUnmanagedPacketHandler((header, connection, array) =>
{
Console.WriteLine("\nReceived unmanaged byte[] from " + connection.ToString());
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(i.ToString() + " - " + array[i].ToString());
}
});
//Create suitable send receive options for use with unmanaged connections
SendReceiveOptions optionsToUse = new SendReceiveOptions <NullSerializer>();
//Get the local IPEndPoints we intend to listen on
//The port provided is '0' meaning select a random port.
List <IPEndPoint> localIPEndPoints = (from current in HostInfo.IP.FilteredLocalAddresses()
select new IPEndPoint(current, 0)).ToList();
//Create suitable listeners depending on the desired connectionType
List <ConnectionListenerBase> listeners;
if (connectionTypeToUse == ConnectionType.TCP)
{
//For each localIPEndPoint get a TCP listener
//We need to set the ApplicationLayerProtocolStatus to Disabled
listeners = (from current in localIPEndPoints
select(ConnectionListenerBase) new TCPConnectionListener(optionsToUse, ApplicationLayerProtocolStatus.Disabled)).ToList();
}
else
{
//We need to set the ApplicationLayerProtocolStatus to Disabled
listeners = (from current in localIPEndPoints
select(ConnectionListenerBase) new UDPConnectionListener(optionsToUse, ApplicationLayerProtocolStatus.Disabled, UDPConnection.DefaultUDPOptions)).ToList();
}
//Start listening
Connection.StartListening(listeners, localIPEndPoints, true);
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
Console.WriteLine("Listening for incoming byte[] on:");
List <EndPoint> localListeningEndPoints = Connection.ExistingLocalListenEndPoints(connectionTypeToUse);
foreach (IPEndPoint localEndPoint in localListeningEndPoints)
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
Console.WriteLine("\nPress any key if you want to send data from this client. Press q to quit.");
while (true)
{
//Wait for user to press something before sending anything from this end
var keyContinue = Console.ReadKey(true);
if (keyContinue.Key == ConsoleKey.Q)
{
break;
}
//Create the send object based on user input
byteDataToSend = CreateSendArray();
//Get remote endpoint address
//Expecting user to enter IP address as 192.168.0.1:4000
ConnectionInfo connectionInfo = ExampleHelper.GetServerDetails(ApplicationLayerProtocolStatus.Disabled);
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
Connection connectionToUse;
//Create the connection
if (connectionTypeToUse == ConnectionType.TCP)
{
connectionToUse = TCPConnection.GetConnection(connectionInfo, optionsToUse);
}
else
{
connectionToUse = UDPConnection.GetConnection(connectionInfo, UDPOptions.None, optionsToUse);
}
//Send the object
connectionToUse.SendUnmanagedBytes(byteDataToSend);
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
Console.WriteLine("\nSend complete. Press 'q' to quit or any other key to send something else.");
}
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
//Make sure you call shutdown when finished to clean up.
NetworkComms.Shutdown();
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
}
/// <summary>
/// Run the AdvancedSend example.
/// </summary>
public static void RunExample()
{
Console.WriteLine("AdvancedSend Example ...\n");
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
Console.WriteLine("\nNOTE: From this point on make sure both clients are configured in the same way if you want the example to work.");
//Choose between TCP or UDP
SelectConnectionType();
//Choose the serialiser and processors which network comms will use
DataSerializer dataSerializer;
SelectDataSerializer(out dataSerializer);
List <DataProcessor> dataProcessors;
Dictionary <string, string> dataProcessorOptions;
//We cannot select data processors if the NullSerializer was selected
if (dataSerializer.GetType() != typeof(NullSerializer))
{
SelectDataProcessors(out dataProcessors, out dataProcessorOptions);
}
else
{
dataProcessors = new List <DataProcessor>();
dataProcessorOptions = new Dictionary <string, string>();
}
NetworkComms.DefaultSendReceiveOptions = new SendReceiveOptions(dataSerializer, dataProcessors, dataProcessorOptions);
//Add a packet handler for dealing with incoming connections. Function will be called when a packet is received with the specified type. We also here specify the type of object
//we are expecting to receive. In this case we expect an int[] for packet type ArrayTestPacketInt
NetworkComms.AppendGlobalIncomingPacketHandler <byte[]>("ArrayByte",
(header, connection, array) =>
{
Console.WriteLine("\nReceived byte array from " + connection.ToString());
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(i.ToString() + " - " + array[i].ToString());
}
});
//As above but this time we expect a string[], and use a different packet type to distinguish the difference
NetworkComms.AppendGlobalIncomingPacketHandler <string[]>("ArrayString",
(header, connection, array) =>
{
Console.WriteLine("\nReceived string array from " + connection);
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(i.ToString() + " - " + array[i]);
}
});
//Our custom object packet handler will be different depending on which serializer we have chosen
if (NetworkComms.DefaultSendReceiveOptions.DataSerializer.GetType() == typeof(ProtobufSerializer))
{
NetworkComms.AppendGlobalIncomingPacketHandler <ProtobufCustomObject>("CustomObject",
(header, connection, customObject) =>
{
Console.WriteLine("\nReceived custom protobuf object from " + connection);
Console.WriteLine(" ... intValue={0}, stringValue={1}", customObject.IntValue, customObject.StringValue);
});
}
else if (NetworkComms.DefaultSendReceiveOptions.DataSerializer.GetType() == typeof(BinaryFormaterSerializer))
{
NetworkComms.AppendGlobalIncomingPacketHandler <BinaryFormatterCustomObject>("CustomObject",
(header, connection, customObject) =>
{
Console.WriteLine("\nReceived custom binary formatter object from " + connection);
Console.WriteLine(" ... intValue={0}, stringValue={1}", customObject.IntValue, customObject.StringValue);
});
}
else
{
NetworkComms.AppendGlobalIncomingPacketHandler <JSONSerializerCustomObject>("CustomObject",
(header, connection, customObject) =>
{
Console.WriteLine("\nReceived custom JSON object from " + connection);
Console.WriteLine(" ... intValue={0}, stringValue={1}", customObject.IntValue, customObject.StringValue);
});
}
//Start listening for incoming connections
//We want to select a random port on all available adaptors so provide
//an IPEndPoint using IPAddress.Any and port 0.
//If we wanted to listen on a specific port we would use that instead of '0'
Connection.StartListening(connectionTypeToUse, new IPEndPoint(IPAddress.Any, 0));
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
Console.WriteLine("Listening for incoming objects on:");
List <EndPoint> localListeningEndPoints = Connection.ExistingLocalListenEndPoints(connectionTypeToUse);
foreach (IPEndPoint localEndPoint in localListeningEndPoints)
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
Console.WriteLine("\nPress any key if you want to send something from this client. Press q to quit.");
while (true)
{
//Wait for user to press something before sending anything from this end
var keyContinue = Console.ReadKey(true);
if (keyContinue.Key == ConsoleKey.Q)
{
break;
}
//Create the send object based on user input
CreateSendObject();
//Expecting user to enter IP address as 192.168.0.1:4000
ConnectionInfo connectionInfo = ExampleHelper.GetServerDetails();
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
Connection connectionToUse;
//Create the connection
if (connectionTypeToUse == ConnectionType.TCP)
{
connectionToUse = TCPConnection.GetConnection(connectionInfo);
}
else
{
connectionToUse = UDPConnection.GetConnection(connectionInfo, UDPOptions.None);
}
//Send the object
if (toSendType == typeof(Array))
{
if (toSendObject.GetType().GetElementType() == typeof(byte))
{
connectionToUse.SendObject("ArrayByte", toSendObject);
}
else
{
connectionToUse.SendObject("ArrayString", toSendObject);
}
}
else
{
connectionToUse.SendObject("CustomObject", toSendObject);
}
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
Console.WriteLine("\nSend complete. Press 'q' to quit or any other key to send something else.");
}
//***************************************************************//
// Start of interesting stuff //
//***************************************************************//
//Make sure you call shutdown when finished to clean up.
NetworkComms.Shutdown();
//***************************************************************//
// End of interesting stuff //
//***************************************************************//
}
/// <summary>
/// Run example
/// </summary>
public static void RunExample()
{
//Select mode
Console.WriteLine("SpeedTest Example ...\n");
Console.WriteLine("Please select host or peer mode:");
Console.WriteLine("1 - Host Mode (Catches Data)");
Console.WriteLine("2 - Peer Mode (Sends Data)");
//Read in user choice
if (Console.ReadKey(true).Key == ConsoleKey.D1)
{
hostMode = true;
}
else
{
hostMode = false;
}
if (hostMode)
{
//Prepare DFS in host mode
#region ServerMode
Console.WriteLine("\n ... host mode selected.");
NetworkComms.ConnectionEstablishShutdownDelegate clientEstablishDelegate = (connection) =>
{
Console.WriteLine("Client " + connection.ConnectionInfo + " connected.");
};
NetworkComms.ConnectionEstablishShutdownDelegate clientShutdownDelegate = (connection) =>
{
Console.WriteLine("Client " + connection.ConnectionInfo + " disconnected.");
};
NetworkComms.PacketHandlerCallBackDelegate <byte[]> IncomingDataDelegate = (packetHeader, connection, incomingObject) =>
{
Console.WriteLine("Speed bytes received from " + connection.ConnectionInfo + ".");
};
NetworkComms.AppendGlobalConnectionEstablishHandler(clientEstablishDelegate);
NetworkComms.AppendGlobalConnectionCloseHandler(clientShutdownDelegate);
NetworkComms.AppendGlobalIncomingPacketHandler("SpeedData", IncomingDataDelegate);
//Start listening for TCP connections
//We want to select a random port on all available adaptors so provide
//an IPEndPoint using IPAddress.Any and port 0.
Connection.StartListening(ConnectionType.TCP, new IPEndPoint(IPAddress.Any, 0));
Console.WriteLine("\nListening for incoming connections on:");
foreach (IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
Console.WriteLine("\nIdentifier - {0}", NetworkComms.NetworkIdentifier);
Console.WriteLine("\nPress 'q' to close host.\n");
while (true)
{
ConsoleKeyInfo pressedKey = Console.ReadKey(true);
if (pressedKey.Modifiers != ConsoleModifiers.Control && pressedKey.Key == ConsoleKey.Q)
{
Console.WriteLine("Closing host.");
break;
}
}
#endregion
}
else if (!hostMode)
{
//Prepare DFS in peer mode
#region PeerMode
Console.WriteLine("\n ... peer mode selected.");
Console.WriteLine("\nPlease enter how large the test data packet should be in MB and press return (larger is more accurate), e.g. 1024:");
int numberMegsToCreate = int.Parse(Console.ReadLine());
//Fill a byte[] with random data
DateTime startTime = DateTime.Now;
Random randGen = new Random();
byte[] someRandomData = new byte[numberMegsToCreate * 1024 * 1024];
randGen.NextBytes(someRandomData);
Console.WriteLine("\nTest speed data created. Using {0}MB.\n", numberMegsToCreate);
NetworkComms.PacketConfirmationTimeoutMS = 20000;
ConnectionInfo serverConnectionInfo = ExampleHelper.GetServerDetails();
Console.WriteLine("\nIdentifier - {0}", NetworkComms.NetworkIdentifier);
SendReceiveOptions nullCompressionSRO = new SendReceiveOptions <NullSerializer>();
//Add options which will require receive confirmations and also include packet construction time
//in the packet header.
nullCompressionSRO.Options.Add("ReceiveConfirmationRequired", "");
nullCompressionSRO.Options.Add("IncludePacketConstructionTime", "");
TCPConnection serverConnection = TCPConnection.GetConnection(serverConnectionInfo);
Stopwatch timer = new Stopwatch();
while (true)
{
timer.Reset();
timer.Start();
serverConnection.SendObject("SpeedData", someRandomData, nullCompressionSRO);
timer.Stop();
Console.WriteLine("SpeedData sent successfully with receive confirmation in {0}secs. Corresponds to {1}MB/s", (timer.ElapsedMilliseconds / 1000.0).ToString("0.00"), (numberMegsToCreate / (timer.ElapsedMilliseconds / 1000.0)).ToString("0.00"));
}
#endregion
}
NetworkComms.Shutdown();
}
/// <summary>
/// Run example
/// </summary>
public static void RunExample()
{
Console.WriteLine("Secure Socket Layer (SSL) Example ...\n");
//Ensure we have a certificate to use
//Maximum security is achieved by using a trusted certificate
//To keep things simple here we just create a self signed certificate for testing
string certName = "testCertificate.pfx";
if (!File.Exists(certName))
{
Console.WriteLine("Creating self-signed test certificate - " + certName);
CertificateDetails details = new CertificateDetails("CN=networkcomms.net", DateTime.Now, DateTime.Now.AddYears(1));
//We could increase/decrease the default key length if we want
details.KeyLength = 1024;
//Save the certificate to disk
SSLTools.CreateSelfSignedCertificatePFX(details, certName);
certificate = new X509Certificate2(certName);
Console.WriteLine("\t... certificate successfully created.");
}
else
{
//Load an existing certificate
Console.WriteLine("Loading existing certificate - " + certName);
certificate = new X509Certificate2(certName);
Console.WriteLine("\t... certificate successfully loaded.");
}
//Add a global incoming packet handler for packets of type "Message"
//This handler will convert the incoming raw bytes into a string (this is what
//the <string> bit means) and then write that string to the local console window.
NetworkComms.AppendGlobalIncomingPacketHandler <string>("Message", (packetHeader, connection, incomingString) =>
{
Console.WriteLine("\n ... Incoming message from " + connection.ToString() + " saying '" + incomingString + "'.");
});
//Create suitable SSLOptions to use with TCP
SelectSSLOptions();
//Get a list of all local endPoints using the default port
List <IPEndPoint> desiredlocalEndPoints = (from current in HostInfo.IP.FilteredLocalAddresses()
select new IPEndPoint(current, 0)).ToList();
//Create a list of matching TCP listeners where we provide the listenerSSLOptions
List <ConnectionListenerBase> listeners = (from current in desiredlocalEndPoints
select(ConnectionListenerBase)(new TCPConnectionListener(NetworkComms.DefaultSendReceiveOptions,
ApplicationLayerProtocolStatus.Enabled,
listenerSSLOptions))).ToList();
//Start listening for incoming TCP connections
Connection.StartListening(listeners, desiredlocalEndPoints, true);
//Print out the listening addresses and ports
Console.WriteLine("\nListening for incoming TCP (SSL) connections on:");
foreach (IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
//We loop here to allow any number of test messages to be sent and received
while (true)
{
//Request a message to send somewhere
Console.WriteLine("\nPlease enter your message and press enter (Type 'exit' to quit):");
string stringToSend = Console.ReadLine();
//If the user has typed exit then we leave our loop and end the example
if (stringToSend == "exit")
{
break;
}
else
{
//Once we have a message we need to know where to send it
//We have created a small wrapper class to help keep things clean here
ConnectionInfo targetServerConnectionInfo = ExampleHelper.GetServerDetails();
try
{
//Get a connection to the target server using the connection SSL options we configured earlier
//If there is a problem with the SSL handshake this will throw a CommsSetupShutdownException
TCPConnection connection = TCPConnection.GetConnection(targetServerConnectionInfo,
sendingSendReceiveOptions,
connectionSSLOptions);
//Send our message of the encrypted connection
connection.SendObject("Message", stringToSend);
}
catch (CommsException)
{
//We catch all exceptions by using CommsException
Console.WriteLine("\nERROR - Connection to " + targetServerConnectionInfo + " was unsuccessful." +
" Server is either not listening or the entered SSL configurations" +
"are not compatible. Please check settings and try again.");
}
}
}
//If we have used comms features we must gracefully shutdown
NetworkComms.Shutdown();
}
/// <summary>
/// Run the example
/// </summary>
public void Run()
{
//Expecting user to enter ip address as 192.168.0.1:4000
ConnectionInfo connectionInfo = ExampleHelper.GetServerDetails();
SelectConnectionType();
try
{
//We would really like to create a local instance of MathClass, but the client does not have a
//reference to MathClass (defined server side only):
//
//IMath remoteObject = new MathClass();
//
//This example is all about RPC, so we create the instance remotely instead, as follows ...
//We need to select our remote object using one of the available access methods
string instanceId = "";
Connection connection = null;
if (connectionTypeToUse == ConnectionType.TCP)
{
connection = TCPConnection.GetConnection(connectionInfo);
}
else
{
connection = UDPConnection.GetConnection(connectionInfo, UDPOptions.None);
}
//Get the remote object
IMath remoteObject = SelectRemoteObject(connection, out instanceId);
//Add a handler to the object's event to demonstrate remote triggering of events
remoteObject.EchoEvent += (sender, args) =>
{
Console.WriteLine("Echo event received saying {0}", args.EchoValue);
};
Console.WriteLine("\nRemote object has been selected. RPC object instanceId: {0}", instanceId);
while (true)
{
//We can now perform RPC operations on our remote object
Console.WriteLine("\nPlease press 'y' key to perform some remote math. Any other key will quit the example.");
string message = Console.ReadKey(true).KeyChar.ToString().ToLower();
//If the user has typed exit then we leave our loop and end the example
if (message == "y")
{
//We pass our remoteObject to our local method DoMath to keep this area of code clean
Console.WriteLine("Result: " + DoMath(remoteObject).ToString());
}
else
{
break;
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally
{
NetworkComms.Shutdown();
}
}
/// <summary>
/// Run example
/// </summary>
public static void RunExample()
{
Console.WriteLine("IntermediateSend Example ...\n");
//Set the default send receive options to use for all communication
//
//Serializers convert custom objects into byte[] which is required for transmission
// - Here we have selected the ProtobufSerializer. For more please see the AdvancedSend example.
//
//Data processors manipulate the raw byte[] of an object, some encrypt, some compress etc etc.
// - Here we have selected a single data processor which will compress data, the LZMACompressor
// For more please see the AdvancedSend example.
NetworkComms.DefaultSendReceiveOptions = new SendReceiveOptions <ProtobufSerializer, LZMACompressor>();
//Ensure the packet construction time is included in all sent packets
NetworkComms.DefaultSendReceiveOptions.IncludePacketConstructionTime = true;
//Ensure all incoming packets are handled with the priority AboveNormal
NetworkComms.DefaultSendReceiveOptions.ReceiveHandlePriority = QueueItemPriority.AboveNormal;
//We need to define what happens when packets are received.
//To do this we add an incoming packet handler for a 'Message' packet type.
//You are free to choose your own packet types.
//
//This handler will expect the incoming raw bytes to be converted to a string (this is what the <string> bit means).
NetworkComms.AppendGlobalIncomingPacketHandler <string>("Message", HandleIncomingMessagePacket);
//Start listening for incoming 'TCP' connections.
//We want to select a random port on all available adaptors so provide
//an IPEndPoint using IPAddress.Any and port 0.
//See also Connection.StartListening(ConnectionType.UDP, IPEndPoint)
Connection.StartListening(ConnectionType.TCP, new IPEndPoint(IPAddress.Any, 0));
//Print the IP addresses and ports we are listening on to make sure everything
//worked as expected.
Console.WriteLine("Listening for TCP messages on:");
foreach (IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
//We loop here to allow any number of test messages to be sent and received
while (true)
{
//Request a message to send somewhere
Console.WriteLine("\nPlease enter your message and press enter (Type 'exit' to quit):");
string stringToSend = Console.ReadLine();
//If the user has typed exit then we leave our loop and end the example
if (stringToSend == "exit")
{
break;
}
else
{
try
{
//Once we have a message we need to know where to send it
//We have created a small wrapper class to help keep things clean here
ConnectionInfo targetServerConnectionInfo = ExampleHelper.GetServerDetails();
//We get a connection to the desired target server
//This is performed using a static method, i.e. 'TCPConnection.GetConnection()' instead of
//using 'new TCPConnection()' to ensure thread safety. This means if you have a multi threaded application
//and attempt to get a connection the same target server simultaneously, you will only ever create
//a single connection.
Connection conn = TCPConnection.GetConnection(targetServerConnectionInfo);
//We send the string using a 'Message' packet type
//There are a large number of overrides to SendObject
//Please see our other examples or the online API
//http://www.networkcomms.net/api/
conn.SendObject("Message", stringToSend);
}
catch (CommsException ex)
{
//All NetworkComms.Net exception inherit from CommsException so we can easily
//catch all just by catching CommsException. For the break down of exceptions please
//see our online API.
//http://www.networkcomms.net/api/
//If an error occurs we need to decide what to do.
//In this example we will just log to a file and continue.
LogTools.LogException(ex, "IntermediateSendExampleError", "rekt m9");
Console.WriteLine("\nError: CommsException was caught. Please see the log file created for more information.\n");
}
}
}
//We should always call shutdown on NetworkComms.Net if we have used it
NetworkComms.Shutdown();
}
/// <summary>
/// The distributed file system (DFS) allows for the high performance distribution of large files
/// within a cluster of peers. This sytem replicates the behaviour the bitTorrent protocol by using
/// NetworkCommsDotNet. This example demonstrates the DFS in action.
/// </summary>
public static void RunExample()
{
//Select mode
Console.WriteLine("Distributed File System (DFS) Example ...\n");
Console.WriteLine("Please select host or peer mode:");
Console.WriteLine("1 - Host Mode (Original source of data)");
Console.WriteLine("2 - Peer Mode (Builds data and then acts as subhost)");
//Read in user choice
if (Console.ReadKey(true).Key == ConsoleKey.D1)
{
hostMode = true;
}
else
{
hostMode = false;
}
if (hostMode)
{
//Prepare DFS in host mode
#region ServerMode
Console.WriteLine("\n ... host mode selected.");
Console.WriteLine("\nPlease enter how large the test data packet should be in MB and press return, e.g. 50:");
int numberMegsToCreate = int.Parse(Console.ReadLine());
//Fill a byte[] with random data
DateTime startTime = DateTime.Now;
Random randGen = new Random();
byte[] someRandomData = new byte[numberMegsToCreate * 1024 * 1024];
randGen.NextBytes(someRandomData);
Console.WriteLine("\n ... successfully created a {0}MB test packet.", ((double)someRandomData.Length / (1024.0 * 1024.0)).ToString("0.###"));
object listLocker = new object();
List <IPEndPoint> connectedClients = new List <IPEndPoint>();
//Initialise the DFS before creating the test object to ensure the correct port and IP are used as the seed
DFS.Initialise(10000);
//Create the item to be distributed
List <ConnectionInfo> seedConnectionInfoList = (from current in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP) select new ConnectionInfo(ConnectionType.TCP, NetworkComms.NetworkIdentifier, current, true)).ToList();
DistributedItem newItem = new DistributedItem("exampleItem", "exampleItem", new MemoryStream(someRandomData), seedConnectionInfoList, DataBuildMode.Disk_Single);
NetworkComms.ConnectionEstablishShutdownDelegate clientEstablishDelegate = (connection) =>
{
lock (listLocker)
connectedClients.Remove((IPEndPoint)connection.ConnectionInfo.RemoteEndPoint);
Console.WriteLine("Client " + connection.ConnectionInfo + " connected.");
};
NetworkComms.ConnectionEstablishShutdownDelegate clientShutdownDelegate = (connection) =>
{
lock (listLocker)
connectedClients.Remove((IPEndPoint)connection.ConnectionInfo.RemoteEndPoint);
Console.WriteLine("Client " + connection.ConnectionInfo + " disconnected.");
};
NetworkComms.PacketHandlerCallBackDelegate <int> ReplyDelegate = (packetHeader, connection, incomingObject) =>
{
//Push the item into the swarm
lock (listLocker)
if (!connectedClients.Contains(connection.ConnectionInfo.RemoteEndPoint))
{
connectedClients.Add((IPEndPoint)connection.ConnectionInfo.RemoteEndPoint);
}
DFS.PushItemToPeer(connection, newItem, "BigDataRequestResponse");
Console.WriteLine("Pushing item to " + connection.ConnectionInfo + " (" + connection.ConnectionInfo.NetworkIdentifier + "). {0} in swarm. P#={1}, S#={2}.", connectedClients.Count, newItem.PushCount, newItem.TotalChunkSupplyCount);
};
NetworkComms.PacketHandlerCallBackDelegate <string> InfoDelegate = (packetHeader, connectionId, incomingString) =>
{
Console.WriteLine(" ... " + connectionId + " - " + incomingString);
};
Console.WriteLine(" ... DFS has been initialised.");
NetworkComms.AppendGlobalConnectionEstablishHandler(clientEstablishDelegate);
NetworkComms.AppendGlobalConnectionCloseHandler(clientShutdownDelegate);
NetworkComms.AppendGlobalIncomingPacketHandler("BigDataRequest", ReplyDelegate);
NetworkComms.AppendGlobalIncomingPacketHandler("ClientInfo", InfoDelegate);
Console.WriteLine("\nListening for incoming connections on:");
foreach (IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
Console.WriteLine("\nIdentifier - {0}", NetworkComms.NetworkIdentifier);
Console.WriteLine("\nPress 's' to write out stats, 'q' to close any connected peers, 'ctrl+q' to close this host.\n");
while (true)
{
ConsoleKeyInfo pressedKey = Console.ReadKey(true);
#region Host Shutdown
if (pressedKey.Modifiers != ConsoleModifiers.Control && pressedKey.Key == ConsoleKey.Q)
{
Console.WriteLine("Sending shutdown to clients...");
lock (listLocker)
{
for (int i = 0; i < connectedClients.Count; i++)
{
try
{
TCPConnection.GetConnection(new ConnectionInfo(connectedClients[i])).SendObject("ClientCommand", 0);
}
catch (Exception)
{
Console.WriteLine("Exception telling client to shutdown. Probably already disconnected.");
}
}
}
}
else if (pressedKey.Modifiers == ConsoleModifiers.Control && pressedKey.Key == ConsoleKey.Q)
{
Console.WriteLine("Sending shutdown to clients and closing local host...");
lock (listLocker)
{
for (int i = 0; i < connectedClients.Count; i++)
{
try
{
TCPConnection.GetConnection(new ConnectionInfo(connectedClients[i])).SendObject("ClientCommand", 0);
}
catch (Exception)
{
Console.WriteLine("Exception telling client to shutdown. Probably already disconnected.");
}
}
}
Console.WriteLine("Closing host.");
break;
}
else if (pressedKey.Key == ConsoleKey.S)
{
#region Stats
Console.WriteLine("\nCurrent Stats:");
Console.WriteLine("{0} comms connections.", NetworkComms.TotalNumConnections());
if (NetworkComms.TotalNumConnections() > 0)
{
Console.WriteLine("Connections with: ");
var connections = NetworkComms.GetExistingConnection();
foreach (var connection in connections)
{
Console.WriteLine("\t{0}", connection.ConnectionInfo);
}
}
#endregion
}
#endregion
}
#endregion
}
else if (!hostMode)
{
//Prepare DFS in peer mode
#region PeerMode
Console.WriteLine("\n ... peer mode selected.");
ConnectionInfo serverConnectionInfo = ExampleHelper.GetServerDetails();
DFS.Initialise(10000);
Console.WriteLine(" ... DFS has been initialised.");
bool shutDown = false;
bool buildComplete = true;
DateTime startTime = DateTime.Now;
int buildCount = 0;
NetworkComms.PacketHandlerCallBackDelegate <byte[]> ReplyDelegate = (packetHeader, connection, dataBytes) =>
{
try
{
buildCount++;
DistributedItem item = DFS.MostRecentlyCompletedItem();
Console.WriteLine(" ... full item build " + buildCount + " took {0} secs ({1} MB/s) using {2} total peers. {3} builds completed.", (DateTime.Now - startTime).TotalSeconds.ToString("0.00"), (((double)dataBytes.Length / 1048576.0) / (DateTime.Now - startTime).TotalSeconds).ToString("0.0"), item.SwarmChunkAvailability.NumPeersInSwarm(), buildCount);
double speed = (((double)dataBytes.Length / 1048576.0) / (DateTime.Now - startTime).TotalSeconds);
connection.SendObject("ClientInfo", " ... build " + buildCount + " took " + (DateTime.Now - startTime).TotalSeconds.ToString("0.00") + " secs (" + speed.ToString("0.0") + " MB/s) using " + item.SwarmChunkAvailability.NumPeersInSwarm() + " peers. " + buildCount + " builds completed.");
buildComplete = true;
}
catch (Exception)
{
Console.WriteLine("Shutting down due to exception.");
shutDown = true;
}
};
NetworkComms.PacketHandlerCallBackDelegate <int> ShutdownDelegate = (packetHeader, connectionId, packetDataBytes) =>
{
shutDown = true;
};
NetworkComms.AppendGlobalIncomingPacketHandler("BigDataRequestResponse", ReplyDelegate);
NetworkComms.AppendGlobalIncomingPacketHandler("ClientCommand", ShutdownDelegate);
Console.WriteLine("\nIdentifier - {0}", NetworkComms.NetworkIdentifier);
Console.WriteLine("\nListening for incoming objects on:");
foreach (IPEndPoint localEndPoint in Connection.ExistingLocalListenEndPoints(ConnectionType.TCP))
{
Console.WriteLine("{0}:{1}", localEndPoint.Address, localEndPoint.Port);
}
startTime = DateTime.Now;
while (true)
{
if (!shutDown && buildComplete)
{
Console.WriteLine("\nPress 'r' to rebuild or any other key to shutdown.");
var shutdownKey = Console.ReadKey(true).Key;
if (shutdownKey != ConsoleKey.R)
{
shutDown = true;
}
if (!shutDown)
{
DistributedItem item = DFS.MostRecentlyCompletedItem();
if (item != null)
{
DFS.RemoveItem(item.Data.CompleteDataCheckSum);
Console.WriteLine("\n ... item removed from local and rebuilding at {0}.", DateTime.Now.ToString("HH:mm:ss.fff"));
startTime = DateTime.Now;
}
buildComplete = false;
TCPConnection.GetConnection(serverConnectionInfo).SendObject("BigDataRequest");
Console.WriteLine(" ... initiating item build ...");
}
}
else if (shutDown)
{
shutDown = true;
DFS.Shutdown();
break;
}
Thread.Sleep(250);
}
try
{
TCPConnection.GetConnection(serverConnectionInfo).SendObject("ClientInfo", "... shutting down, initiating DFS shutdown.");
}
catch (CommsException)
{
Console.WriteLine("... unable to inform local of shutdown. Connection probably already closed.");
}
Console.WriteLine("Done. Completed {0} builds.", buildCount);
#endregion
}
DFS.Shutdown();
NetworkComms.Shutdown();
}
