private void WriteMetadata(IRpcHttpContext ctx, Stream outputStream)
{
var md = ReflectionHelper.GetRpcServiceInfo(impls);
ctx.WriteOutput(outputStream, md);
}
private void ProcessNormalRequest(IRpcHttpContext ctx, Stream outputStream)
{
RpcError error = new RpcError("rpc server error.", null);
if (ctx.Request.ContentLength64 > ByteSize.FromMbs(10).TotalBytes)
{
error.Message = "request data is limited in 10Mb";
}
else
{
var requestMeta = ctx.Request.Headers["meta"];
if (requestMeta != null)
{
//get request metadata
IRpcHeadSerializer headSerializer;
if (!iocContainer.TryResolve(out headSerializer))
{
headSerializer = iocContainer.Resolve <IRpcHeadSerializer>("default");
}
RpcHead head = null;
bool deserialize_head_error_obtained = false;
bool deserialize_body_error_obtained = false;
try
{
head = headSerializer.Deserialize(requestMeta);
}
catch (Exception ex)
{
deserialize_head_error_obtained = true;
error.Message = "error on deserialize rpc head metadata. " + ex.Message;
error.StackTrace = ex.StackTrace;
}
if (head != null)
{
RpcHead.SetCurrent(head);
Type itfType = itfTypes.FirstOrDefault(x => x.Namespace == head.Namespace && x.Name == head.TypeName);
if (itfType != null)
{
var itfMethod = (MethodInfo)ReflectionHelper.ResolveMethod(itfType, head.MethodMDToken);
if (itfMethod != null)
{
var parmTypes = itfMethod.GetParameters().Select(x => x.ParameterType).ToArray();
var pramNames = itfMethod.GetParameters().Select(x => x.Name).ToArray();
bool error_generated = false;
IRpcService rpcService = null;
//deserialize arguments
IRpcDataSerializer serializer;
if (!iocContainer.TryResolve(out serializer))
{
serializer = iocContainer.Resolve <IRpcDataSerializer>("default");
}
object[] args = null;
if (head.EventOp)
{
FixupEventHandlerType(parmTypes);
}
try
{
args = serializer.Deserialize(ctx.Request.InputStream, parmTypes, pramNames);
}
catch (Exception ex)
{
deserialize_body_error_obtained = true;
error.Message = "error on deserialize rpc request data. " + ex.Message;
error.StackTrace = ex.StackTrace;
}
if (!deserialize_body_error_obtained)
{
object impl = null;
object returnVal = null;
//find a instance
if (!this.instances.TryGetValue(head.InstanceId, out impl))
{
//resolve the implimentation of the interface
impl = iocContainer.Resolve(itfType);
}
var implInternal = impl;
if (impl != null && !typeof(ThunkImplementation).IsAssignableFrom(impl.GetType()))
{
//thunk impl is for event remote handle, if no this thunk, server can not known which client handler will call
impl = this.instances[head.InstanceId] = thunkImplFactory.GetProxy(itfType, impl, head.InstanceId, this);
}
//process a call for getting user infomation if user code support authroize
rpcService = impl as IRpcService;
var abstractRpcService = implInternal as RpcService;
if (abstractRpcService != null)
{
abstractRpcService.exceptionHandler = this.ExceptionHandler;
abstractRpcService.authorizeHandler = this.AuthroizeHandler;
}
RpcIdentity identity = rpcService != null?rpcService.Authroize(head.Token) : AuthroizeHandler.Authroize(head.Token);
var principal = new RpcPrincipal(identity);
Thread.CurrentPrincipal = principal;
if (abstractRpcService != null)
{
abstractRpcService.User = principal;
}
var rpcAdministration = implInternal as RpcServiceAdministration;
if (rpcAdministration != null)
{
rpcAdministration.Server = this;
}
Type instanceType = impl.GetType();
try
{
Console.WriteLine("[rpc call] {0}.{1}.{2}", head.Namespace, head.TypeName, head.MethodName);
if (!RpcMethodHelper.IsAuthoirzied(itfType, itfMethod, instanceType))
{
error_generated = true;
error = new RpcError("access denied.", null);
ctx.Response.StatusCode = 401;
}
else
{
//execute the call
if (head.EventOp)
{
//Debugger.Break();
var op = head.GetEventOp();
//create a method as the event proxy
EventInfo e = TypeHelper.GetEventInfo(itfType, op.EventName);
var hanlderName = itfType.Name + "_" + op.EventName;
//thunkHandler is a proxy method will call DelegateHelper.
var thunkHandler = instanceType.GetMethod(hanlderName);
var clientHandlerId = (int)args[0]; /*event callback id of client*/
//event register/unregister
if (op.EventKind == RpcEventKind.Add)
{
EventHub.AddEventHandler(e, impl, head.InstanceId, thunkHandler, clientHandlerId);
}
else
{
EventHub.RemoveEventHandler(e, impl, head.InstanceId, thunkHandler, clientHandlerId);
BlockingQueue <RpcEvent> messages;
if (this.eventMessages.TryGetValue(head.InstanceId, out messages))
{
//null for close the ws connection
//Console.WriteLine("send null RpcEvent for close the ws connection on instance " + head.InstanceId);
messages.Enqueue(null);
}
}
}
else
{
MethodInfo implMethod = RpcMethodHelper.FindImplMethod(itfType, itfMethod, instanceType);
returnVal = RpcMethodHelper.Invoke(itfType, itfMethod, impl, implMethod, head.EventOp, head.Timeout, head.Token, args);
}
//dispose resouces like stream
foreach (IDisposable item in args.OfType <IDisposable>())
{
try
{
item.Dispose();
}
catch { }
}
}
}
catch (TargetInvocationException ex)
{
error_generated = true;
if (rpcService != null)
{
try
{
error = rpcService.HandleException(head, ex.InnerException);
}
catch (Exception ex2)
{
//do not use exceptionHandler here, it may cause a deal loop
//because the rpcService backend ex handler is exceptionHandler by default
error = RpcError.FromException(ex2);
}
}
else
{
error = this.ExceptionHandler.HandleException(head, ex.InnerException);
}
}
catch (Exception ex)
{
error_generated = true;
if (rpcService != null)
{
try
{
error = rpcService.HandleException(head, ex);
}
catch (Exception ex2)
{
//do not use exceptionHandler here, it may cause a deal loop
//because the rpcService backend ex handler is exceptionHandler by default
error = RpcError.FromException(ex2);
}
}
else
{
error = this.ExceptionHandler.HandleException(head, ex);
}
}
if (!error_generated)
{
try
{
if (itfMethod.ReturnType != typeof(void))
{
if (typeof(Task).IsAssignableFrom(itfMethod.ReturnType))
{
if (itfMethod.ReturnType.IsGenericType)
{
serializer.Serialize(outputStream, new Type[] { itfMethod.ReturnType.GenericTypeArguments[0] }, new object[] { returnVal }, new string[] { "p0" });
}
else
{
//no need handle task without a result.
}
}
else
{
serializer.Serialize(outputStream, new Type[] { itfMethod.ReturnType }, new object[] { returnVal }, new string[] { "p0" });
}
IDisposable value = returnVal as IDisposable;
if (value != null)
{
try { value.Dispose(); } catch { }
}
IDisposable inst = impl as IDisposable;
if (inst != null)
{
try { inst.Dispose(); } catch { }
}
}
return;
}
catch (Exception ex)
{
Console.WriteLine("error on writting response, " + ex.Message);
return; // connection is broken. nothing to do.
}
}
}
}
else
{
error.Message = "invalid rpc request metadata, unknown method under the interface.";
}
}
else
{
error.Message = "invalid rpc request metadata, unknown interface.";
}
}
else if (!deserialize_head_error_obtained)
{
error.Message = "invalid rpc request metadata, deserialize failed.";
}
}
else
{
error.Message = "invalid rpc request metadata";
}
}
Console.WriteLine(error.Message);
Console.WriteLine(error.StackTrace);
if (ctx.Response.StatusCode == 200)
{
ctx.Response.StatusCode = 500;
ctx.Response.StatusDescription = "Internal Server Error";
}
ctx.WriteOutput(outputStream, error);
}