RemotingSurrogateSelector.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Runtime / Remoting / RemotingSurrogateSelector.cs / 1 / RemotingSurrogateSelector.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

namespace System.Runtime.Remoting.Messaging { 
 
    using System;
    using System.Runtime.InteropServices; 
    using System.Runtime.Remoting;
    using System.Runtime.Remoting.Metadata;
    using System.Runtime.Remoting.Activation;
    using System.Runtime.Remoting.Proxies; 
    using System.Runtime.Serialization;
    using System.Runtime.Serialization.Formatters; 
    using System.Text; 
    using System.Reflection;
    using System.Threading; 
    using System.Globalization;
    using System.Collections;
    using System.Security.Permissions;	
[System.Runtime.InteropServices.ComVisible(true)] 
    public delegate bool MessageSurrogateFilter(String key, Object value);
 
    [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure)]	 
    [SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags=SecurityPermissionFlag.Infrastructure)]	
[System.Runtime.InteropServices.ComVisible(true)] 
    public class RemotingSurrogateSelector : ISurrogateSelector
    {
        // Private static data
        private static Type s_IMethodCallMessageType = typeof(IMethodCallMessage); 
        private static Type s_IMethodReturnMessageType = typeof(IMethodReturnMessage);
        private static Type s_ObjRefType = typeof(ObjRef); 
 
        // Private member data
        private Object _rootObj = null; 
        private ISurrogateSelector _next = null;
        private RemotingSurrogate  _remotingSurrogate = new RemotingSurrogate();
        private ObjRefSurrogate _objRefSurrogate = new ObjRefSurrogate();
        private ISerializationSurrogate _messageSurrogate  = null; 
        private MessageSurrogateFilter _filter = null;
 
 
        public RemotingSurrogateSelector()
        { 
            _messageSurrogate = new MessageSurrogate(this);
        }

        public MessageSurrogateFilter Filter 
        {
            set { _filter = value; } 
            get { return _filter; } 
        }
 
        public void SetRootObject(Object obj)
        {
            if (obj == null)
            { 
                throw new ArgumentNullException("obj");
            } 
            _rootObj = obj; 
            SoapMessageSurrogate soapMsg = _messageSurrogate as SoapMessageSurrogate;
            if (null != soapMsg) 
            {
                soapMsg.SetRootObject(_rootObj);
            }
        } 

        public Object GetRootObject() 
        { 
            return _rootObj;
        } 

        // Specifies the next ISurrogateSelector to be examined for surrogates if the current
        // instance doesn't have a surrogate for the given type and assembly in the given context.
 	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	 
        public virtual void ChainSelector(ISurrogateSelector selector) {_next = selector;}
 
        // Returns the appropriate surrogate for the given type in the given context. 
	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	
        public virtual ISerializationSurrogate GetSurrogate(Type type, StreamingContext context, out ISurrogateSelector ssout) 
        {
            if (type == null)
            {
                throw new ArgumentNullException("type"); 
            }
 
            Message.DebugOut("Entered  GetSurrogate for " + type.FullName + "\n"); 

            if (type.IsMarshalByRef) 
            {
                Message.DebugOut("Selected surrogate for " + type.FullName);
                ssout = this;
                return _remotingSurrogate; 
            }
            else if (s_IMethodCallMessageType.IsAssignableFrom(type) || 
                     s_IMethodReturnMessageType.IsAssignableFrom(type)) 
            {
                ssout = this; 
                return _messageSurrogate;
            }
            else if (s_ObjRefType.IsAssignableFrom(type))
            { 
                ssout = this;
                return _objRefSurrogate; 
            } 
            else if (_next != null)
            { 
                return _next.GetSurrogate(type, context, out ssout);
            }
            else
            { 
                ssout = null;
                return null; 
            } 

        } // GetSurrogate 

	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	
        public virtual ISurrogateSelector GetNextSelector() { return _next;}
 
        public virtual void UseSoapFormat()
        { 
            _messageSurrogate = new SoapMessageSurrogate(this); 
            ((SoapMessageSurrogate)_messageSurrogate).SetRootObject(_rootObj);
        } 
    }

    internal class RemotingSurrogate : ISerializationSurrogate
    { 
	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	
        public virtual void GetObjectData(Object obj, SerializationInfo info, StreamingContext context) 
        { 
            if (obj == null)
            { 
                throw new ArgumentNullException("obj");
            }

            if (info==null) { 
                throw new ArgumentNullException("info");
            } 
 
            //
            // This code is to special case marshalling types inheriting from RemotingClientProxy 
            // Check whether type inherits from RemotingClientProxy and serialize the correct ObjRef
            // after getting the correct proxy to the actual server object
            //
 
            Message.DebugOut("RemotingSurrogate::GetObjectData obj.Type: " + obj.GetType().FullName + " \n");
            if(RemotingServices.IsTransparentProxy(obj)) 
            { 
                RealProxy rp = RemotingServices.GetRealProxy(obj);
                rp.GetObjectData(info, context); 
            }
            else
            {
                    RemotingServices.GetObjectData(obj, info, context); 
            }
        } 
 

 	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	 
        public virtual Object  SetObjectData(Object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector)
        {
            throw new NotSupportedException(Environment.GetResourceString("NotSupported_PopulateData"));
        } 

    } // class RemotingSurrogate 
 

    internal class ObjRefSurrogate : ISerializationSurrogate 
    {
	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	
        public virtual void GetObjectData(Object obj, SerializationInfo info, StreamingContext context)
        { 
            if (obj == null)
            { 
                throw new ArgumentNullException("obj"); 
            }
 
            if (info==null) {
                throw new ArgumentNullException("info");
            }
 
            //
            // This code is to provide special handling for ObjRef's that are supposed 
            //   to be passed as parameters. 
            //
 
            ((ObjRef)obj).GetObjectData(info, context);
            // add flag indicating the ObjRef was passed as a parameter
            info.AddValue("fIsMarshalled", 0);
        } // GetObjectData 

 	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	 
        public virtual Object  SetObjectData(Object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector) 
        {
            throw new NotSupportedException(Environment.GetResourceString("NotSupported_PopulateData")); 
        }

    } // class ObjRefSurrogate
 

    internal class SoapMessageSurrogate : ISerializationSurrogate 
    { 
        // Private static data
        private static Type _voidType = typeof(void); 
        private static Type _soapFaultType = typeof(SoapFault);

        // Member data
        String DefaultFakeRecordAssemblyName = "http://schemas.microsoft.com/urt/SystemRemotingSoapTopRecord"; 
        Object _rootObj = null;
        RemotingSurrogateSelector _ss; 
 
        internal SoapMessageSurrogate(RemotingSurrogateSelector ss)
        { 
            _ss = ss;
        }

        internal void SetRootObject(Object obj) 
        {
            _rootObj = obj; 
        } 

        internal virtual String[] GetInArgNames(IMethodCallMessage m, int c) 
        {
            String[] names = new String[c];
            for (int i = 0; i < c; i++)
            { 
                String name = m.GetInArgName(i);
                if (name == null) 
                { 
                    name = "__param" + i;
                } 
                names[i] = name;
            }
            return names;
        } 

        internal virtual String[] GetNames(IMethodCallMessage m, int c) 
        { 
            String[] names = new String[c];
            for (int i = 0; i < c; i++) 
            {
                String name = m.GetArgName(i);
                if (name == null)
                { 
                    name = "__param" + i;
                } 
                names[i] = name; 
            }
            return names; 
        }

 	[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)]	
        public virtual void GetObjectData(Object obj, SerializationInfo info, StreamingContext context) 
        {
            if (info==null) 
            { 
               throw new ArgumentNullException("info");
            } 

            if ( (obj!=null) && (obj !=_rootObj))
            {
                (new MessageSurrogate(_ss)).GetObjectData(obj, info, context); 
            }
            else 
            { 
                IMethodReturnMessage msg = obj as IMethodReturnMessage;
                if(null != msg) 
                {

                    if (msg.Exception == null)
                    { 
                        String responseElementName;
                        String responseElementNS; 
                        String returnElementName; 

                        // obtain response element name namespace 
                        MethodBase mb = msg.MethodBase;
                        SoapMethodAttribute attr = (SoapMethodAttribute)InternalRemotingServices.GetCachedSoapAttribute(mb);
                        responseElementName = attr.ResponseXmlElementName;
                        responseElementNS = attr.ResponseXmlNamespace; 
                        returnElementName = attr.ReturnXmlElementName;
 
                        ArgMapper mapper = new ArgMapper(msg, true /*fOut*/); 
                        Object[] args = mapper.Args;
                        info.FullTypeName = responseElementName; 
                        info.AssemblyName = responseElementNS;
                        Type retType = ((MethodInfo)mb).ReturnType;
                        if (!((retType == null) || (retType == _voidType)))
                        { 
                            info.AddValue(returnElementName, msg.ReturnValue, retType);
                        } 
                        if (args != null) 
                        {
                            Type[] types = mapper.ArgTypes; 
                            for (int i=0; i

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK