/// <summary>
/// Initializes a new instance of the <see cref="T:LeanIPC.RemoteObject"/> class.
/// </summary>
/// <param name="handle">The handle to use.</param>
public RemoteObject(RPCPeer peer, Type type, long handle)
{
m_peer = peer;
m_handle = handle;
m_remoteType = type;
m_typelookups = m_remoteType.IsInterface
? new Type[] { m_remoteType }.Concat(m_remoteType.GetInterfaces()).Distinct().ToArray()
: new Type[] { m_remoteType };
}
/// <summary>
/// Creates a proxy instance that wraps a dictionary of properties
/// </summary>
/// <returns>The property decomposed instance.</returns>
/// <param name="peer">The unused peer instance.</param>
/// <param name="type">The remote type being wrapped.</param>
/// <param name="interface">The interface presented as the wrapped.</param>
/// <param name="values">The decomposed property values.</param>
public static object WrapPropertyDecomposedInstance(this RPCPeer peer, Type type, Type @interface, object[] values)
{
var d = new Dictionary <string, object>();
var names = (string[])values[0];
for (var i = 0; i < names.Length; i++)
{
d[names[i]] = values[i + 1];
}
var p = ProxyCreator.CreateAutomaticProxy <PropertyDecomposedObject>(peer, type, @interface, 0);
var h = p.GetType().GetField("__remoteHandle", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(p) as PropertyDecomposedObject;
h.m_values = d;
return(p);
}
/// <summary>
/// Runs the RPC peer
/// </summary>
/// <returns>An awaitable task.</returns>
public static Task RunClientRPCListenerAsync()
{
// Make sure we have loaded these assemblies into the current process
var myTypes = new List <Type> {
typeof(Ceen.AsyncLock), typeof(Ceen.Httpd.HttpServer), typeof(Ceen.Mvc.Controller)
};
// Preload this, if possible
try { myTypes.Add(Type.GetType("Ceen.Security.PRNG, Ceen.Security")); }
catch { }
// Read environment setup
var path = Environment.GetEnvironmentVariable(SOCKET_PATH_VARIABLE_NAME);
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException($"No path found in the environment variable");
}
var prefix = string.IsNullOrWhiteSpace(Environment.GetEnvironmentVariable(SOCKET_PREFIX_VARIABLE_NAME)) ? string.Empty : "\0";
var socket = new Socket(AddressFamily.Unix, SocketType.Stream, ProtocolType.IP);
socket.Connect(new SockRock.UnixEndPoint(prefix + path));
var ipc = new LeanIPC.InterProcessConnection(new NetworkStream(socket, true));
var peer = new LeanIPC.RPCPeer(ipc, typeof(SpawnedServer));
// Pass back the SpawnedServer instance as a reference
peer.TypeSerializer.RegisterSerializationAction(typeof(SpawnedServer), LeanIPC.SerializationAction.Reference);
// Support these types with automatically generated proxies
peer.AddAutomaticProxy(typeof(IStorageEntry), typeof(IStorageEntry));
peer.AddAutomaticProxy(typeof(IStorageCreator), typeof(IStorageCreator));
// Add support for EndPoint's
peer.TypeSerializer.RegisterEndPointSerializers();
peer.TypeSerializer.RegisterIPEndPointSerializers();
return(Task.WhenAll(
ipc.RunMainLoopAsync(true),
ListenForRequests(peer, path, prefix)
));
}
/// <summary>
/// Initializes a new instance of the <see cref="T:LeanIPC.PropertyDecomposedObject"/> class.
/// </summary>
/// <param name="peer">The unused peer argument.</param>
/// <param name="remotetype">The remote type.</param>
/// <param name="handle">The unused handle argument.</param>
public PropertyDecomposedObject(RPCPeer peer, Type remotetype, long handle)
{
m_peer = peer;
m_remoteType = remotetype;
}
/// <summary>
/// Registers a custom serializer that decomposes an interface into the properties
/// </summary>
/// <param name="peer">The peer to register on.</param>
/// <param name="filter">An optional filter for the properties</param>
/// <typeparam name="T">The type to register the custom serializer for.</typeparam>
public static RPCPeer RegisterPropertyDecomposer <T>(this RPCPeer peer, Func <System.Reflection.PropertyInfo, bool> filter = null)
{
RegisterPropertyDecomposer <T>(peer.TypeSerializer, filter);
return(peer);
}
/// <summary>
/// Registers a custom serializer/deserializer for <see cref="IPEndPoint"/>
/// </summary>
/// <param name="peer">The peer to register on.</param>
/// <returns>The peer instance</returns>
public static RPCPeer RegisterIPEndPointSerializers(this RPCPeer peer)
{
RegisterIPEndPointSerializers(peer.TypeSerializer);
return(peer);
}
/// <summary>
/// Creates a remote proxy for the given handle
/// </summary>
/// <returns>The create.</returns>
/// <param name="peer">The peer to invoke the method on.</param>
/// <param name="type">The remote type being wrapped.</param>
/// <param name="interface">The interface to return</param>
/// <param name="handle">The remote handle.</param>
public static IRemoteInstance WrapRemote(this RPCPeer peer, Type type, Type @interface, long handle)
{
return((IRemoteInstance)ProxyCreator.CreateAutomaticProxy <RemoteObject>(peer, type, @interface, handle));
}
/// <summary>
/// Creates a proxy class for the given interface that makes remote invocations
/// </summary>
/// <returns>The remote proxy.</returns>
/// <param name="peer">The peer to invoke remote methods on.</param>
/// <param name="type">The remote type to make the proxy for.</param>
/// <param name="proxytype">The type to create a proxy with</param>
/// <param name="handlertype">The type that the proxy is interfacing with, must implement IProxyHelper</param>
/// <param name="handle">The remote handle.</param>
public static object CreateRemoteProxy(RPCPeer peer, Type type, Type proxytype, Type handlertype, long handle)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (proxytype == null)
{
throw new ArgumentNullException(nameof(proxytype));
}
if (handlertype == null)
{
throw new ArgumentNullException(nameof(handlertype));
}
lock (_lock)
{
if (!_interfaceCache.ContainsKey(proxytype))
{
// NOTE: Some of the code below actually supports a non-interface type,
// but this only works if _all_ methods on the class are virtual
// To avoid confusion, we only allow interfaces to be auto-proxied
if (!proxytype.IsInterface)
{
throw new ArgumentException($"Cannot generate a proxy for the non-interface type {proxytype}");
}
if (!handlertype.GetInterfaces().Any(x => x == typeof(IProxyHelper)))
{
throw new Exception($"The type {handlertype} does not implement {typeof(IProxyHelper)}");
}
var typename = "DynamicProxy." + type.FullName + "." + Guid.NewGuid().ToString("N").Substring(0, 6);
// Build an assembly and a module to contain the type
var assemblyName = new AssemblyName($"{nameof(LeanIPC)}.{nameof(ProxyCreator)}.{typename}");
var assembly = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
var module = assembly.DefineDynamicModule(assemblyName.Name);
// The RemoteObject constructor args
var constructorArgs = new Type[] { typeof(RPCPeer), typeof(Type), typeof(long) };
var interfaces = new List <Type>();
if (proxytype.IsInterface)
{
interfaces.Add(proxytype);
}
if (!proxytype.GetInterfaces().Contains(typeof(IRemoteInstance)) && handlertype.GetInterfaces().Contains(typeof(IRemoteInstance)))
{
interfaces.Add(typeof(IRemoteInstance));
}
if (!proxytype.GetInterfaces().Contains(typeof(IDisposable)))
{
interfaces.Add(typeof(IDisposable));
}
var basetype = proxytype.IsInterface
? typeof(object)
: proxytype;
// Create the type definition
var typeBuilder = module.DefineType(typename, TypeAttributes.Public, basetype, interfaces.ToArray());
// Create a field to store the remote object instance
var remotefld = typeBuilder.DefineField("__remoteHandle", handlertype, FieldAttributes.Private | FieldAttributes.InitOnly);
// Create the constructor that initializes the remote object field
var constructor = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, constructorArgs);
var construtorIL = constructor.GetILGenerator();
var conm = handlertype.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, constructorArgs, null);
if (conm == null)
{
throw new Exception($"The type {handlertype} does not have a constructor that takes the types ({typeof(RPCPeer)}, {typeof(Type)}, {typeof(long)})");
}
construtorIL.Emit(OpCodes.Ldarg_0);
construtorIL.Emit(OpCodes.Ldarg_1);
construtorIL.Emit(OpCodes.Ldarg_2);
construtorIL.Emit(OpCodes.Ldarg_3);
construtorIL.Emit(OpCodes.Newobj, conm);
construtorIL.Emit(OpCodes.Stfld, remotefld);
construtorIL.Emit(OpCodes.Ret);
// Explicitly wire the IRemoteInstance interface to call remotefld directly
// Since we map this directly, we can treat property access as methods
var explictMethods =
(
interfaces.Contains(typeof(IRemoteInstance)) || proxytype.GetInterfaces().Contains(typeof(IRemoteInstance))
? typeof(IRemoteInstance).GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)
: new MethodInfo[0]
)
.Concat(
typeof(IDisposable).GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)
);
foreach (var sourceMethod in explictMethods)
{
if (!proxytype.IsInterface)
{
continue;
}
var parameterTypes = sourceMethod.GetParameters().Select(x => x.ParameterType).ToArray();
// If the proxy type is IDisposable, we need to call the remote dispose before the local
var isSpecialDispose = sourceMethod.DeclaringType == typeof(IDisposable) && proxytype.GetInterfaces().Contains(typeof(IDisposable));
// Replicate the source method
var method = typeBuilder.DefineMethod(
(isSpecialDispose ? string.Empty : sourceMethod.DeclaringType.Name + ".") + sourceMethod.Name,
MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual,
CallingConventions.Standard,
sourceMethod.ReturnType,
parameterTypes
);
// Write the IL to call the method through the interface
var methodIL = method.GetILGenerator();
// Invoke dispose on the remote instance first
if (isSpecialDispose)
{
methodIL.Emit(OpCodes.Ldarg_0);
methodIL.Emit(OpCodes.Ldfld, remotefld);
methodIL.Emit(OpCodes.Ldstr, sourceMethod.Name);
EmitTypeArray(methodIL, parameterTypes);
EmitArgumentArray(methodIL, parameterTypes, 1);
var methods = handlertype
.GetMethods(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.Name == nameof(IProxyHelper.HandleInvokeMethod))
.Where(x => !x.IsGenericMethod);
methodIL.Emit(OpCodes.Callvirt, methods.First());
methodIL.Emit(OpCodes.Pop);
}
// Pass the call to the IProxyHelper instance
methodIL.Emit(OpCodes.Ldarg_0);
methodIL.Emit(OpCodes.Ldfld, remotefld);
for (var i = 0; i < parameterTypes.Length; i++)
{
EmitLdarg(methodIL, i + 1);
}
methodIL.Emit(OpCodes.Callvirt, sourceMethod);
methodIL.Emit(OpCodes.Ret);
// Specify that our specially named method implements the interface method
if (!isSpecialDispose)
{
typeBuilder.DefineMethodOverride(method, sourceMethod);
}
}
// Add all methods
foreach (var sourceMethod in AllImplementedMethods(proxytype, IGNORETYPES))
{
if (sourceMethod.Name == "Dispose" && sourceMethod.GetParameters().Length == 0 && sourceMethod.ReturnType == typeof(void))
{
continue;
}
if (!proxytype.IsInterface)
{
continue;
}
var parameterTypes = sourceMethod.GetParameters().Select(x => x.ParameterType).ToArray();
// Replicate the source method
var method = typeBuilder.DefineMethod(
sourceMethod.Name,
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.Final | MethodAttributes.Virtual,
CallingConventions.Standard,
sourceMethod.ReturnType,
parameterTypes
);
var methodIL = method.GetILGenerator();
methodIL.Emit(OpCodes.Ldarg_0);
methodIL.Emit(OpCodes.Ldfld, remotefld);
methodIL.Emit(OpCodes.Ldstr, sourceMethod.Name);
EmitTypeArray(methodIL, parameterTypes);
EmitArgumentArray(methodIL, parameterTypes, 1);
var isAsyncResult =
sourceMethod.ReturnType == typeof(Task)
||
(sourceMethod.ReturnType.IsConstructedGenericType && sourceMethod.ReturnType.GetGenericTypeDefinition() == typeof(Task <>));
var methods = handlertype
.GetMethods(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.Name == (isAsyncResult ? nameof(IProxyHelper.HandleInvokeMethodAsync) : nameof(IProxyHelper.HandleInvokeMethod)));
if (sourceMethod.ReturnType == typeof(void))
{
// We discard the null object from the method
methodIL.Emit(OpCodes.Callvirt, methods.First(x => !x.IsGenericMethodDefinition));
methodIL.Emit(OpCodes.Pop);
}
else if (sourceMethod.ReturnType == typeof(Task))
{
// We return the Task from the underlying call
methodIL.Emit(OpCodes.Callvirt, methods.First(x => !x.IsGenericMethodDefinition));
}
else
{
// Unwrap the Task<T>, so the generic argument is T
// or just use the return type for the method
var genericParameter =
sourceMethod.ReturnType.IsConstructedGenericType && sourceMethod.ReturnType.GetGenericTypeDefinition() == typeof(Task <>)
? sourceMethod.ReturnType.GetGenericArguments().First()
: sourceMethod.ReturnType;
methodIL.Emit(OpCodes.Callvirt, methods.First(x => x.IsGenericMethodDefinition).MakeGenericMethod(genericParameter));
}
methodIL.Emit(OpCodes.Ret);
}
// Add all properties
foreach (var sourceProperty in AllImplementedProperties(proxytype, IGNORETYPES))
{
if (!proxytype.IsInterface)
{
continue;
}
var indexParameters = sourceProperty.GetIndexParameters().Select(x => x.ParameterType).ToArray();
var property = typeBuilder.DefineProperty(
sourceProperty.Name,
PropertyAttributes.None,
sourceProperty.PropertyType,
indexParameters
);
if (sourceProperty.CanRead)
{
var getMethod = typeBuilder.DefineMethod(
"get_" + property.Name,
MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Final | MethodAttributes.Virtual | MethodAttributes.NewSlot,
CallingConventions.HasThis,
sourceProperty.PropertyType,
indexParameters
);
var getMethodIL = getMethod.GetILGenerator();
getMethodIL.Emit(OpCodes.Ldarg_0);
getMethodIL.Emit(OpCodes.Ldfld, remotefld);
getMethodIL.Emit(OpCodes.Ldstr, sourceProperty.Name);
EmitTypeArray(getMethodIL, indexParameters);
EmitArgumentArray(getMethodIL, indexParameters, 1);
var isAsyncResult =
sourceProperty.PropertyType.IsConstructedGenericType
&&
sourceProperty.PropertyType.GetGenericTypeDefinition() == typeof(Task <>);
var baseGetMethod = handlertype
.GetMethods(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.Name == (isAsyncResult ? nameof(IProxyHelper.HandleInvokePropertyGetAsync) : nameof(IProxyHelper.HandleInvokePropertyGet)))
.Where(x => x.IsGenericMethodDefinition)
.First();
var genericParameter =
isAsyncResult
? sourceProperty.PropertyType.GetGenericArguments().First()
: sourceProperty.PropertyType;
getMethodIL.Emit(OpCodes.Callvirt, baseGetMethod.MakeGenericMethod(genericParameter));
getMethodIL.Emit(OpCodes.Ret);
property.SetGetMethod(getMethod);
}
if (sourceProperty.CanWrite)
{
var setMethod = typeBuilder.DefineMethod(
"set_" + property.Name,
MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Final | MethodAttributes.Virtual | MethodAttributes.NewSlot,
CallingConventions.HasThis,
typeof(void),
new Type[] { sourceProperty.PropertyType }.Concat(indexParameters).ToArray()
);
var setMethodIL = setMethod.GetILGenerator();
setMethodIL.Emit(OpCodes.Ldarg_0);
setMethodIL.Emit(OpCodes.Ldfld, remotefld);
setMethodIL.Emit(OpCodes.Ldstr, sourceProperty.Name);
setMethodIL.Emit(OpCodes.Ldarg_1);
if (sourceProperty.PropertyType.IsValueType)
{
setMethodIL.Emit(OpCodes.Box, sourceProperty.PropertyType);
}
EmitTypeArray(setMethodIL, indexParameters);
EmitArgumentArray(setMethodIL, indexParameters, 2);
setMethodIL.Emit(OpCodes.Callvirt, handlertype.GetMethod(nameof(IProxyHelper.HandleInvokePropertySet), BindingFlags.Public | BindingFlags.Instance));
setMethodIL.Emit(OpCodes.Ret);
property.SetSetMethod(setMethod);
}
}
_interfaceCache[proxytype] = typeBuilder.CreateTypeInfo();
}
}
// Return the instance
//var typeInfo = typeBuilder.CreateTypeInfo();
//var instanceConstructor = typeInfo.GetConstructor(constructorArgs);
return(Activator.CreateInstance(_interfaceCache[proxytype], new object[] { peer, type, handle }));
}
/// <summary>
/// Creates a proxy class for the given interface that makes remote invocations
/// </summary>
/// <returns>The remote proxy.</returns>
/// <param name="peer">The peer to invoke remote methods on.</param>
/// <param name="type">The remote type to make the proxy for.</param>
/// <param name="proxytype">The type to create a proxy with</param>
/// <param name="handle">The remote handle.</param>
/// <typeparam name="TBase">The type that the proxy is interfacing with</typeparam>
public static object CreateAutomaticProxy <TBase>(RPCPeer peer, Type type, Type proxytype, long handle)
where TBase : IProxyHelper
{
return(CreateRemoteProxy(peer, type, proxytype, typeof(TBase), handle));
}
