/// <summary>
/// Connect to server. This opens a persistent connection allowing multiple remote calls
/// until <see cref="Disconnect(bool)" /> is called.
/// </summary>
/// <param name="keepAlive">Whether to send pings over the connection to keep it alive</param>
/// <returns>True if succeeded, false if not</returns>
public virtual bool Connect(bool keepAlive = true)
{
var source = new NamedPipeClientStream(
".",
PipeName,
PipeDirection.InOut,
PipeOptions.Asynchronous);
try
{
source.Connect(500);
}
catch (TimeoutException)
{
return(false);
}
Stream = new IpcStream(source, KnownTypes);
if (keepAlive)
{
StartPing();
}
return(true);
}
/// <summary>
/// Register a service interface on the server
/// </summary>
/// <param name="t">The interface of the service</param>
/// <param name="instance">Instance of a class implementing the service</param>
public void RegisterService(Type t, object instance)
{
services[t.Name] = instance;
types[t.Name] = t;
IpcStream.ScanInterfaceForTypes(t, KnownTypes);
}
/// <summary>
/// Register a service interface on the server
/// </summary>
/// <typeparam name="T">The interface of the service</typeparam>
/// <param name="instance">Instance of a class implementing the service</param>
public void RegisterService <T>(T instance)
{
if (!(instance is T))
{
throw new InvalidOperationException("Instance must implement service interface");
}
services[typeof(T).Name] = instance;
types[typeof(T).Name] = typeof(T);
IpcStream.ScanInterfaceForTypes(typeof(T), KnownTypes);
}
/// <summary>
/// Scans the service interface and builds proxy class
/// </summary>
/// <typeparam name="T">Service interface, must equal server-side</typeparam>
/// <returns>Proxy class for remote calls</returns>
public T GetServiceProxy <T>()
{
IpcStream.ScanInterfaceForTypes(typeof(T), KnownTypes);
return((T)_proxyGenerator.CreateInterfaceProxyWithoutTarget(typeof(T), new Proxy <T>(this)));
}
/// <summary>
/// Process a received message by calling the corresponding method on the service instance and
/// returning the return value over the network.
/// </summary>
/// <param name="source">Network stream</param>
private bool ProcessMessage(NamedPipeServerStream source)
{
// Checks, if the stream is from an allowed client ...
if (!CheckPipeServerStreamForAllowedProcess(source))
{
return(false);
}
var stream = new IpcStream(source, KnownTypes);
var msg = stream.ReadMessage();
// this was a close-connection notification
if (msg == null || msg.StatusMsg == StatusMessage.CloseConnection)
{
return(false);
}
if (msg.StatusMsg == StatusMessage.Ping)
{
return(true);
}
var processedOk = false;
var error = "";
object rv = null;
// find the service
if (services.TryGetValue(msg.Service, out var instance) && instance != null)
{
// get the method
var method = instance.GetType().GetMethod(msg.Method);
// double check method existence against type-list for security
// typelist will contain interfaces instead of instances
if (GetServiceMethod(types[msg.Service], msg.Method) != null && method != null)
{
try
{
// invoke method
rv = method.Invoke(instance, msg.Parameters);
processedOk = true;
}
catch (Exception e)
{
error = e.ToString();
}
}
else
{
error = "Could not find method";
}
}
else
{
error = "Could not find service";
}
// return either return value or error message
var returnMsg = processedOk ? new IpcMessage {
Return = rv
} : new IpcMessage {
Error = error
};
stream.WriteMessage(returnMsg);
// if there's more to come, keep reading a next message
return(msg.StatusMsg == StatusMessage.KeepAlive);
}
